Dynamically configurable acknowledgement procedure

文档序号：1821877 发布日期：2021-11-09 浏览：7次中文

阅读说明：本技术 可动态配置的确收规程 (Dynamically configurable acknowledgement procedure ) 是由晓风·王 D·张徐慧琳 J·马 I·I·萨基尼尼于 2020-03-26 设计创作，主要内容包括：描述了用于无线通信的方法、系统和设备。基站和用户终端可在非地面网络中经由中继卫星进行通信。非地面网络可能在混合自动重复请求(HARQ)过程中由于通信延迟而导致通信中断。经由卫星进行通信的基站和用户终端可实现可动态配置的HARQ过程以避免无线通信系统中的等待时间。(Methods, systems, and devices for wireless communication are described. The base station and the user terminal may communicate via a relay satellite in a non-terrestrial network. Non-terrestrial networks may cause communication interruptions due to communication delays during hybrid automatic repeat request (HARQ) processes. Base stations and user terminals communicating via satellites may implement dynamically configurable HARQ processes to avoid latency in wireless communication systems.)

1. A method for wireless communication at a user terminal, comprising:

receiving a message from a base station indicating configurable hybrid automatic repeat request (HARQ) processes that are configurable on a per-HARQ process basis;

determining parameters for the configurable HARQ process based at least in part on the message; and

performing the configurable HARQ process based at least in part on the parameter.

2. The method of claim 1, wherein the message is received via a communication link in a non-terrestrial network, and wherein determining the parameter is based at least in part on the wireless communication link being part of the non-terrestrial network.

3. The method of claim 1, further comprising:

determining that a round trip delay associated with the configurable HARQ process between the base station and the user terminal satisfies a threshold, wherein determining the parameter is based at least in part on determining that the round trip delay satisfies the threshold.

4. The method of claim 1, further comprising:

determining that a propagation delay window between transmitting a transport block and receiving a positive acknowledgement or a negative acknowledgement satisfies a threshold, and wherein determining the parameter is based at least in part on determining that the propagation delay window satisfies the threshold.

5. The method of claim 1, wherein determining the parameter further comprises:

reducing a maximum number of HARQ retransmissions allowed during the configurable HARQ process based at least in part on receiving the message.

6. The method of claim 1, wherein performing the configurable HARQ process is based at least in part on modulation and coding scheme information associated with a maximum number of HARQ processes.

7. The method of claim 1, wherein determining the parameter further comprises:

determining to disable one or more features associated with one or more transport blocks in the HARQ process.

8. The method of claim 7, wherein the parameter indicates that a positive acknowledgement or a negative acknowledgement is to follow a data transmission.

9. The method of claim 7, wherein the parameter indicates whether HARQ combining is used to perform the configurable HARQ process.

10. The method of claim 7, wherein the message is received via Radio Resource Control (RRC) signaling or in a System Information Block (SIB).

11. The method of claim 1, wherein the HARQ process is disabled based at least in part on receiving the message, wherein the message includes the identified HARQ process identifier.

12. The method of claim 1, further comprising:

flushing one or more buffers associated with the configurable HARQ process based at least in part on receiving the message, wherein the message includes an indicator to cause the user terminal to flush the one or more buffers associated with the configurable HARQ process.

13. The method of claim 1, wherein determining the parameter further comprises:

determining that a HARQ transmission spans more than one slot, wherein the parameter comprises a size of the HARQ transmission.

14. The method of claim 13, further comprising:

one or more grouped code blocks from a transport block are received over a plurality of time slots.

15. A method for wireless communication at a user terminal, comprising:

receiving, at the user terminal, a message indicating a maximum number of parallel hybrid automatic repeat request (HARQ) processes supported between a base station and the user terminal;

determining a maximum number of the parallel HARQ processes supported between the base station and the user terminal from the message; and

performing one or more HARQ processes based at least in part on the maximum number.

16. The method of claim 15, wherein the maximum number of parallel HARQ processes is based at least in part on a number of buffers the user terminal can configure for parallel HARQ processes.

17. The method of claim 15, further comprising:

identifying a HARQ identifier and identifying at least one of a slot number, a time, or a subframe count; and

identifying a first HARQ process of the number of parallel HARQ processes based at least in part on the HARQ identifier and based on at least one of the slot number, the time, or the subframe count, wherein transmitting the message is based at least in part on identifying the first HARQ process.

18. The method of claim 15, wherein a first HARQ process of the number of parallel HARQ processes is indexed by a HARQ identifier and by at least one of a slot number, a time, or a subframe count.

19. The method of claim 15, further comprising:

configuring a number of acknowledgement or negative acknowledgement bits included in a single message associated with the number of parallel HARQ processes; and

transmitting the single message with the number of acknowledgement or negative acknowledgement bits based at least in part on receiving the message.

20. A method for wireless communications at a base station, comprising:

determining parameters for a configurable hybrid automatic repeat request (HARQ) process for a user terminal that are configurable on a per-HARQ process basis; and

transmitting a message indicating the configurable HARQ process and the parameters to the user terminal.

21. The method of claim 20, further comprising:

22. The method of claim 20, further comprising:

23. The method of claim 20, wherein determining the parameter further comprises:

determining to disable one or more features associated with one or more transport blocks in the HARQ process.

24. The method of claim 23, wherein disabling HARQ processes is done on a per cell basis.

25. The method of claim 23, wherein the message includes an indicator that causes the user terminal to flush one or more buffers associated with the configurable HARQ process.

26. The method of claim 23, wherein the message comprises a HARQ acknowledgement configured to cause the user terminal to flush a buffer associated with a configurable acknowledgement process.

27. The method of claim 20, wherein determining the parameter further comprises:

determining that a HARQ transmission spans more than one slot, wherein the parameter comprises a size of the HARQ transmission.

28. The method of claim 27, further comprising:

grouping code blocks from a plurality of transport blocks; and

the warp encoded block is transmitted over a plurality of time slots.

29. A method for wireless communications at a base station, comprising:

transmitting a message to a user terminal indicating a maximum number of parallel hybrid automatic repeat request (HARQ) processes supported between the base station and the user terminal;

determining a maximum number of the parallel HARQ processes supported between the base station and the user terminal from the message; and

performing one or more HARQ processes according to the maximum number.

30. The method of claim 29, further comprising:

identifying a HARQ identifier and identifying at least one of a slot number, a time, or a subframe count; and

SUMMARY

A method of wireless communication at a user terminal is described. The method may include receiving a message from a base station indicating configurable hybrid automatic repeat request (HARQ) processes that are configurable on a per-HARQ process basis; and determining parameters for the configurable HARQ process based on the message. The method may further include performing the configurable HARQ process based on the parameter.

Another apparatus for wireless communication at a user terminal is described. The apparatus may include means for: receiving a message from a base station indicating configurable HARQ processes that are configurable on a per HARQ process basis; and determining parameters for the configurable HARQ process based on the message. The apparatus may further include performing the configurable HARQ process based on the parameter.

A non-transitory computer-readable medium storing code for wireless communication at a user terminal is described. The code may include instructions executable by a processor for: receiving a message from a base station indicating configurable HARQ processes that are configurable on a per HARQ process basis; and determining parameters for the configurable HARQ process based on the message. The code may further include instructions executable by the processor for: the configurable HARQ process is performed based on the parameter.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the message may be received via a communication link in a non-terrestrial network, and wherein determining the parameter may be based on the wireless communication link being part of the non-terrestrial network.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: determining that a round trip delay associated with the configurable HARQ process between the base station and the user terminal satisfies a threshold, wherein determining the parameter may be based on determining that the round trip delay satisfies the threshold.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: determining that a propagation delay window between transmitting a transport block and receiving a positive acknowledgement or a negative acknowledgement satisfies a threshold, and wherein determining the parameter may be based on determining that the propagation delay window satisfies the threshold.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: reducing a maximum number of HARQ retransmissions allowed during the configurable HARQ process based on receiving the message.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the parameter indicates whether HARQ combining can be used to perform the configurable HARQ process.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: performing the configurable HARQ process may be based on modulation and coding scheme information associated with a maximum number of HARQ processes.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: determining to disable one or more features associated with one or more transport blocks in the HARQ process.

In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the parameter indicates that a positive acknowledgement or a negative acknowledgement is to follow a data transmission.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the message may be received via RRC signaling or in a SIB.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the HARQ process may be disabled based on receiving the message, where the message includes the identified HARQ process identifier.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: flushing one or more buffers associated with the configurable HARQ process based on receiving the message, wherein the message includes an indicator to cause the user terminal to flush the one or more buffers associated with the configurable HARQ process.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: determining that the HARQ transmission spans more than one slot, wherein the parameter includes a size of the HARQ transmission.

A method of wireless communication at a user terminal is described. The method may comprise receiving, at a user terminal, a message indicating a maximum number of parallel HARQ processes supported between a base station and the user terminal; and determining a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. The method may further include performing one or more HARQ processes based on the maximum number.

An apparatus for wireless communication at a user terminal is described. The apparatus may include a processor and a memory coupled with the processor, the processor and the memory configured to cause the apparatus to: receiving, at a user terminal, a message indicating a maximum number of parallel HARQ processes supported between a base station and the user terminal; and determining a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. The processor and the memory may be further configured to cause the apparatus to: performing one or more HARQ processes based on the maximum number.

Another apparatus for wireless communication at a user terminal is described. The apparatus may include means for: receiving, at a user terminal, a message indicating a maximum number of parallel HARQ processes supported between a base station and the user terminal; and determining a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. The apparatus may further include performing one or more HARQ processes based on the maximum number.

A non-transitory computer-readable medium storing code for wireless communication at a user terminal is described. The code may include instructions executable by a processor for: receiving, at a user terminal, a message indicating a maximum number of parallel HARQ processes supported between a base station and the user terminal; and determining a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. The code may further include instructions executable by the processor for: performing one or more HARQ processes based on the maximum number.

In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the maximum number of parallel HARQ processes may be based on a number of buffers that the user terminal may be configured to use for the parallel HARQ processes.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying a HARQ identifier and identifying at least one of a slot number, a time, or a subframe count; and identifying a first HARQ process of the number of parallel HARQ processes based on the HARQ identifier and based on at least one of the slot number, the time, or the subframe count, wherein transmitting the message may be based on identifying the first HARQ process.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, a first HARQ process of the number of parallel HARQ processes may be indexed by a HARQ identifier and by at least one of a slot number, a time, or a subframe count.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: configuring a number of acknowledgement or negative acknowledgement bits included in a single message that may be associated with the number of parallel HARQ processes; and transmitting a single message with the number of acknowledgement or negative acknowledgement bits based on receiving the message.

A method of wireless communication at a base station is described. The method may include determining parameters for a configurable HARQ process for a user terminal that is configurable on a per-HARQ process basis; and transmitting a message indicating the configurable HARQ process and the parameter to the user terminal.

An apparatus for wireless communication at a base station is described. The apparatus may include a processor and a memory coupled with the processor, the processor and the memory configured to cause the apparatus to: determining parameters for a configurable HARQ process for a user terminal that are configurable on a per HARQ process basis; and transmitting a message indicating the configurable HARQ process and the parameter to the user terminal.

Another apparatus for wireless communication at a base station is described. The apparatus may include means for: determining parameters for a configurable HARQ process for a user terminal that are configurable on a per HARQ process basis; and transmitting a message indicating the configurable HARQ process and the parameter to the user terminal.

A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor for: determining parameters for a configurable HARQ process for a user terminal that are configurable on a per HARQ process basis; and transmitting a message indicating the configurable HARQ process and the parameter to the user terminal.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: determining that a propagation delay window between transmitting a transport block and receiving a positive acknowledgement or a negative acknowledgement satisfies a threshold, and wherein determining the parameter may be based on determining that the propagation delay window satisfies the threshold.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: determining to disable one or more features associated with one or more transport blocks in the HARQ process.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the message includes an indicator that causes the user terminal to flush one or more buffers associated with the configurable HARQ process.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the message includes a HARQ acknowledgement configured to cause the user terminal to flush a buffer associated with a configurable acknowledgement process.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: determining that the HARQ transmission spans more than one slot, wherein the parameter includes a size of the HARQ transmission.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: grouping code blocks from a plurality of transport blocks; and transmitting the warp encoded block over a plurality of time slots.

A method of wireless communication at a base station is described. The method may comprise transmitting a message to a user terminal indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal; and determining a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. The method may further include performing one or more HARQ processes according to the maximum number.

An apparatus for wireless communication at a base station is described. The apparatus may include a processor and a memory coupled with the processor, the processor and the memory configured to cause the apparatus to: transmitting a message indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal to the user terminal; and determining a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. The processor and the memory may be further configured to cause the apparatus to: performing one or more HARQ processes according to the maximum number.

Another apparatus for wireless communication at a base station is described. The apparatus may include means for: transmitting a message indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal to the user terminal; and determining a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. The apparatus may further include performing one or more HARQ processes according to the maximum number.

A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor for: transmitting a message indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal to the user terminal; and determining a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. The code may further include instructions executable by the processor for: performing one or more HARQ processes according to the maximum number.

A method of wireless communication at a user terminal is described. The method can comprise the following steps: transmitting a first message to a base station indicating the user terminal's ability to participate in a configurable acknowledgement procedure; and receiving a second message from the base station indicating the configurable acknowledgement procedure, wherein the configurable acknowledgement procedure is based on the capabilities of the user terminal. The method may further comprise: determining parameters for the configurable acknowledgement procedure based on the second message; and performing the configurable acknowledgement process based on the parameter.

An apparatus for wireless communication at a user terminal is described. The apparatus may include a processor and a memory coupled with the processor, the processor and the memory configured to cause the apparatus to: transmitting a first message to a base station indicating the user terminal's ability to participate in a configurable acknowledgement procedure; and receiving a second message from the base station indicating the configurable acknowledgement procedure, wherein the configurable acknowledgement procedure is based on the capabilities of the user terminal. The processor and the memory may be further configured to cause the apparatus to: determining parameters for the configurable acknowledgement procedure based on the second message; and performing the configurable acknowledgement process based on the parameter.

Another apparatus for wireless communication at a user terminal is described. The apparatus may include means for: transmitting a first message to a base station indicating the user terminal's ability to participate in a configurable acknowledgement procedure; and receiving a second message from the base station indicating the configurable acknowledgement procedure, wherein the configurable acknowledgement procedure is based on the capabilities of the user terminal. The apparatus may further comprise: determining parameters for the configurable acknowledgement procedure based on the second message; and performing the configurable acknowledgement process based on the parameter.

A non-transitory computer-readable medium storing code for wireless communication at a user terminal is described. The code may include instructions executable by a processor for: transmitting a first message to a base station indicating the user terminal's ability to participate in a configurable acknowledgement procedure; and receiving a second message from the base station indicating the configurable acknowledgement procedure, wherein the configurable acknowledgement procedure is based on the capabilities of the user terminal. The code may further include instructions executable by the processor for: determining parameters for the configurable acknowledgement procedure based on the second message; and performing the configurable acknowledgement process based on the parameter.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying a wireless communication link for communicating a second message associated with the configurable acknowledgement process may be part of a non-terrestrial network, wherein determining the parameter may be based on identifying that the wireless communication link may be part of a non-terrestrial network.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: determining that a round trip delay associated with the configurable acknowledgement process between the base station and the user terminal satisfies a threshold, wherein determining the parameter may be based on determining that the round trip delay satisfies the threshold.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying that a propagation delay window between transmitting the message and receiving an acknowledgement or negative acknowledgement satisfies a threshold, wherein determining the parameter may be based on determining that the propagation delay window satisfies the threshold.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the parameter comprises a maximum number of HARQ retransmissions.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying modulation and coding scheme information associated with the maximum number of HARQ retransmissions, wherein performing the configurable acknowledgement process may be based on identifying the modulation and coding scheme information.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: determining to disable HARQ retransmissions associated with one or more messages.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the parameter indicates that the maximum number of HARQ retransmissions may be equal to zero.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the second message includes RRC signaling configured to disable the HARQ retransmission.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the second message includes downlink control information configured to disable the HARQ retransmission.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the second message includes a SIB.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying a HARQ identifier indicating that the HARQ retransmission may be disabled based on receiving a second message, wherein the second message includes the identified HARQ identifier.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: the one or more buffers associated with the configurable acknowledgement process are refreshed based on receiving a second message, wherein the second message includes an indicator to cause the user terminal to refresh the one or more buffers associated with the configurable acknowledgement process.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the indicator comprises a New Data Indicator (NDI), a Code Block Group Transmission Information (CBGTI) indicator, a code block group clear information (CBGFI) indicator, or a combination thereof.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the second message includes a HARQ acknowledgement configured to cause the user terminal to flush a buffer associated with a configurable acknowledgement process.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: the number of parallel HARQ processes between the base station and the user terminal is determined.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the number of parallel HARQ processes may be greater than sixteen HARQ processes.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the first message indicates a number of buffers that the user terminal may be configured to use for parallel HARQ processes, and the number of parallel HARQ processes may be based on the number of buffers.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the second message includes a HARQ identifier having five or more bits.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying a HARQ identifier and identifying at least one of a slot number, a time, or a subframe count; and identifying a first HARQ process of the number of parallel HARQ processes based on the HARQ identifier and based on at least one of the slot number, the time, or the subframe count, wherein transmitting the second message may be based on identifying the first HARQ process.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: configuring a number of acknowledgement or negative acknowledgement bits included in a single message that may be associated with the number of parallel HARQ processes; and transmitting a single message with the number of acknowledgement or negative acknowledgement bits based on receiving the second message.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: determining that the HARQ transmission spans more than one slot, wherein the parameter includes a size of the HARQ transmission.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: determining a size of a transport block associated with the HARQ transmission, wherein determining that the HARQ transmission spans more than one slot may be based on determining the size of the transport block.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the size of the HARQ transmission may be configured to fill a propagation delay window associated with a round trip delay of the configurable acknowledgement process.

A method of wireless communication at a base station is described. The method can comprise the following steps: receiving, from a user terminal, a first message indicating a capability of the user terminal to participate in a configurable acknowledgement procedure; determining parameters for the configurable acknowledgement procedure based on the capabilities of the user terminal; and transmitting a second message to the user terminal indicating the configurable acknowledgement procedure and the parameter.

An apparatus for wireless communication at a base station is described. The apparatus may include a processor and a memory coupled with the processor, the processor and the memory configured to cause the apparatus to: receiving, from a user terminal, a first message indicating a capability of the user terminal to participate in a configurable acknowledgement procedure; determining parameters for the configurable acknowledgement procedure based on the capabilities of the user terminal; and transmitting a second message to the user terminal indicating the configurable acknowledgement procedure and the parameter.

Another apparatus for wireless communication at a base station is described. The apparatus may include means for: receiving, from a user terminal, a first message indicating a capability of the user terminal to participate in a configurable acknowledgement procedure; determining parameters for the configurable acknowledgement procedure based on the capabilities of the user terminal; and transmitting a second message to the user terminal indicating the configurable acknowledgement procedure and the parameter.

A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor for: receiving, from a user terminal, a first message indicating a capability of the user terminal to participate in a configurable acknowledgement procedure; determining parameters for the configurable acknowledgement procedure based on the capabilities of the user terminal; and transmitting a second message to the user terminal indicating the configurable acknowledgement procedure and the parameter.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying a wireless communication link for communicating a second message associated with the configurable acknowledgement process may be part of a non-terrestrial network, wherein determining the parameter may be based on identifying that the wireless communication link may be part of a non-terrestrial network.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: determining that a round trip delay associated with the configurable acknowledgement process between the base station and the user terminal satisfies a threshold, wherein determining the parameter may be based on determining that the round trip delay satisfies the threshold.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying that a propagation delay window between transmitting the message and receiving an acknowledgement or negative acknowledgement satisfies a threshold, wherein determining the parameter may be based on determining that the propagation delay window satisfies the threshold.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: the maximum number of HARQ retransmissions allowed during the configurable acknowledgement process is reduced based on the capabilities of the user terminal.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the parameter comprises a maximum number of HARQ retransmissions.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying modulation and coding scheme information associated with the maximum number of HARQ retransmissions, wherein transmitting the second message may be based on identifying the modulation and coding scheme information.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: determining to disable HARQ retransmissions associated with one or more messages.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the second message includes a SIB.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying a HARQ identifier indicating that the HARQ retransmission may be disabled, wherein the second message includes the identified HARQ identifier.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the second message includes an indicator to cause the user terminal to refresh one or more buffers associated with the configurable acknowledgement process.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the indicator comprises an NDI, a CBGTI indicator, a CBGFI indicator, or a combination thereof.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: the number of parallel HARQ processes between the base station and the user terminal is determined.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the number of parallel HARQ processes may be greater than sixteen HARQ processes.

In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the second message includes a HARQ identifier having five or more bits.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: identifying a HARQ identifier and identifying at least one of a slot number, a time, or a subframe count; and identifying a first HARQ process of the number of parallel HARQ processes based on the HARQ identifier and based on at least one of the slot number, the time, or the subframe count, wherein transmitting the second message may be based on identifying the first HARQ process.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: configuring a number of acknowledgement or negative acknowledgement bits included in a single message that may be associated with the number of parallel HARQ processes; and receiving a single message with the number of acknowledgement or negative acknowledgement bits based on transmitting the second message.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, determining the parameter may further include operations, features, devices, or instructions for: determining that the HARQ transmission spans more than one slot, wherein the parameter includes a size of the HARQ transmission.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: determining a size of a transport block associated with the HARQ transmission, wherein determining that the HARQ transmission spans more than one slot may be based on determining the size of the transport block.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: grouping code blocks from a plurality of transport blocks; and transmitting the warp encoded block over a plurality of time slots.

Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions to: the size of the HARQ transmission is enlarged to fill a propagation delay window associated with a round trip delay of the configurable acknowledgement process.

Brief Description of Drawings

Fig. 1 illustrates an example of a wireless communication system supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 2A illustrates an example of a wireless communication system that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 2B illustrates an example of a transmission diagram supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 3A-3C illustrate examples of transmission diagrams supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 4 illustrates an example of a process flow supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 5 and 6 illustrate block diagrams of devices supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 7 illustrates a block diagram of a communication manager that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 8 illustrates a diagram of a system including devices supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 9 and 10 illustrate block diagrams of devices supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 11 illustrates a block diagram of a communication manager that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 12 illustrates a diagram of a system including devices supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Fig. 13-20 show flow diagrams illustrating methods of supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure.

Detailed Description

Non-terrestrial networks (sometimes referred to as NTNs) may provide coverage by using high altitude relays between base stations and user terminals. For example, a base station may transmit data to a satellite, which may then be relayed to a user terminal, and vice versa. The user terminal may be any device having the capability to transmit signals to a satellite. Examples of a user terminal may include a User Equipment (UE), relay equipment configured to relay signals between a satellite and the user terminal, or a combination thereof. The base station and the satellite may be several thousand kilometres apart, and it may take some time for electromagnetic waves to propagate through the distances between the base station and the satellite and between the satellite and the user terminal. The propagation delay of a non-terrestrial network may be many orders of magnitude greater than the propagation delay of a terrestrial network. As such, the round trip delay (sometimes referred to as RTD) associated with a signal may also be several orders of magnitude greater for non-terrestrial networks than for terrestrial networks.

The long round trip delay associated with non-terrestrial networks may cause problems in the downlink HARQ process. For example, because of the long round trip delay of the signal, a retransmission or HARQ process may take a much longer time in a non-terrestrial network communication system when compared to a terrestrial network. In some wireless communication systems, a user terminal may support a maximum number of HARQ processes operating in parallel per slot (e.g., sixteen (16) parallel HARQ processes per slot). As the round trip delay increases, the amount of time it takes to resolve the HARQ process may also increase. In some networks, the maximum number of supportable HARQ processes may be configured such that the user terminal does not run out of parallel operating HARQ processes. For example, in a normal case, the user terminal may be configured to resolve at least one HARQ process before it starts using the maximum number of supportable HARQ processes. After the round trip delay reaches a certain length, the user terminal may be able to start the maximum number of HARQ processes before solving the other HARQ processes. In such cases, the user terminal may not be able to run HARQ processes for signals that exceed the maximum number of HARQ processes.

Techniques for configuring HARQ processes when a round trip delay is longer than a threshold are described. An example of when such a HARQ process configuration may be used may be when a communication link is established over a non-terrestrial network. In some implementations, the maximum number of HARQ retransmissions that are part of a HARQ process may be configurable. In some implementations, HARQ processes may be disabled based on the round trip delay satisfying a threshold. In some implementations, the maximum number of HARQ processes running in parallel may be configured based on the round trip delay satisfying a threshold. In yet other implementations, the size of the HARQ transmission may be extended to fill the propagation delay window caused by the increased round trip delay.

Aspects of the present disclosure are initially described in the context of a wireless communication system. Aspects of the disclosure are also illustrated by the transmission diagrams and process flow diagrams. Aspects of the present disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow charts related to a dynamically configurable acknowledgement procedure.

Fig. 1 illustrates an example of a wireless communication system 100 that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The wireless communication system 100 includes base stations 105, user terminals 115, satellites 120, and a core network 130. In some examples, the wireless communication system 100 may be an LTE network, an LTE-a Pro network, or an NR network. In some cases, wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low cost and low complexity devices.

The base station 105 may communicate wirelessly with the user terminals 115 via one or more base station antennas. The base stations 105 described herein may include or may be referred to by those skilled in the art as base transceiver stations, radio base stations, access points, radio transceivers, node bs, evolved node bs (enbs), next generation node bs or gigabit node bs (any of which may be referred to as gnbs), home node bs, home evolved node bs, or some other suitable terminology. The wireless communication system 100 may include different types of base stations 105 (e.g., macro cell base stations or small cell base stations). The user terminals 115 described herein may be capable of communicating with various types of base stations 105 and network equipment, including macro enbs, small cell enbs, gbbs, relay base stations, and so forth.

Each base station 105 may be associated with a particular geographic coverage area 110, supporting communication with various user terminals 115 within that particular geographic coverage area 110. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via a communication link 125, and the communication link 125 between the base station 105 and the user terminal 115 may utilize one or more carriers. The communication links 125 shown in the wireless communication system 100 may include uplink transmissions from the user terminals 115 to the base stations 105 or downlink transmissions from the base stations 105 to the user terminals 115. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.

The geographic coverage area 110 of a base station 105 can be divided into sectors that form a portion of the geographic coverage area 110, and each sector can be associated with a cell. For example, each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other type of cell, or various combinations thereof. In some examples, the base stations 105 may be mobile and thus provide communication coverage for a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and the overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.

The term "cell" refers to a logical communication entity for communicating with a base station 105 (e.g., on a carrier) and may be associated with an identifier to distinguish between neighboring cells (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID)) operating via the same or different carriers. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., Machine Type Communication (MTC), narrowband internet of things (NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access for different types of devices. In some cases, the term "cell" may refer to a portion (e.g., a sector) of geographic coverage area 110 over which a logical entity operates.

The user terminals 115 may be dispersed throughout the wireless communication system 100, and each user terminal 115 may be stationary or mobile. The user terminal may be any device capable of transmitting signals to a satellite. Examples of a user terminal may include a UE, relay equipment configured to relay signals between a satellite and a UE, or a combination thereof. User terminal 115 may also be referred to as a UE, a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, station, terminal, or client. The user terminal 115 may also be a personal electronic device such as a cellular phone, a Personal Digital Assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, user terminal 115 may also refer to a Wireless Local Loop (WLL) station, an internet of things (IoT) device, an internet of everything (IoE) device, or an MTC device, among others, which may be implemented in various items such as appliances, vehicles, meters, and so forth.

Some user terminals 115, such as MTC or IoT devices, may be low cost or low complexity devices and may provide automated communication between machines (e.g., communication via machine-to-machine (M2M)). M2M communication or MTC may refer to data communication techniques that allow devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communications or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay the information to a central server or application that may utilize the information or present the information to a person interacting with the program or application. Some user terminals 115 may be designed to collect information or to implement automated behavior of the machine. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, field survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based business charging.

Some user terminals 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communications (e.g., a mode that supports unidirectional communication via transmission or reception but does not simultaneously transmit and receive). In some examples, half-duplex communication may be performed with a reduced peak rate. Other power saving techniques for user terminal 115 include entering a power saving "deep sleep" mode when not engaged in active communications, or operating on a limited bandwidth (e.g., according to narrowband communications). In some cases, the user terminal 115 may be designed to support critical functions (e.g., mission critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communication for these functions.

In some cases, user terminals 115 may also be able to communicate directly with other user terminals 115 (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more user terminals in the group of user terminals 115 communicating using D2D may be within the geographic coverage area 110 of the base station 105. The other user terminals 115 in the group may be outside the geographic coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some cases, groups of user terminals 115 communicating via D2D communication may utilize a one-to-many (1: M) system, where each user terminal 115 transmits to every other user terminal 115 in the group. In some cases, the base station 105 facilitates scheduling of resources for D2D communication. In other cases, D2D communication is performed between user terminals 115 without involving base stations 105.

The base stations 105 may communicate with the core network 130 and with each other. For example, the base stations 105 may interface with the core network 130 over backhaul links 132 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other over backhaul links 134 (e.g., via X2, Xn, or other interfaces) directly (e.g., directly between base stations 105) or indirectly (e.g., via the core network 130).

The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an Evolved Packet Core (EPC) that may include at least one Mobility Management Entity (MME), at least one serving gateway (S-GW), and at least one Packet Data Network (PDN) gateway (P-GW). The MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for user terminals 115 served by base stations 105 associated with the EPC. User IP packets may be communicated through the S-GW, which may itself be connected to the P-GW. The P-GW may provide IP address allocation as well as other functions. The P-GW may be connected to network operator IP services. The operator IP services may include access to the internet, intranets, IP Multimedia Subsystem (IMS), or Packet Switched (PS) streaming services.

At least some network devices, such as base stations 105, may include subcomponents, such as access network entities, which may be examples of Access Node Controllers (ANCs). Each access network entity may communicate with the respective user terminal 115 over a number of other access network transport entities, which may be referred to as radio heads, intelligent radio heads, or transmission/reception points (TRPs). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., base station 105).

Wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the 300MHz to 3GHz region is referred to as an Ultra High Frequency (UHF) region or a decimeter band because the wavelengths range from about 1 decimeter to 1 meter long. UHF waves can be blocked or redirected by building and environmental features. However, these waves may penetrate a variety of structures sufficiently for the macro cell to provide service to user terminals 115 located indoors. UHF-wave transmission can be associated with smaller antennas and shorter ranges (e.g., less than 100km) than transmission using smaller and longer waves of the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum below 300 MHz.

The wireless communication system 100 may also operate in the ultra-high frequency (SHF) region using a frequency band from 3GHz to 30GHz, also referred to as a centimeter frequency band. The SHF region includes frequency bands (such as the 5GHz industrial, scientific, and medical (ISM) frequency bands) that may be opportunistically used by devices that may be able to tolerate interference from other users.

The wireless communication system 100 may also operate in the Extremely High Frequency (EHF) region of the spectrum (e.g., from 30GHz to 300GHz), which is also referred to as the millimeter-band. In some examples, the wireless communication system 100 may support millimeter wave (mmW) communication between the user terminals 115 and the base station 105, and the EHF antennas of the respective devices may be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate the use of antenna arrays within user terminal 115. However, propagation of EHF transmissions may experience even greater atmospheric attenuation and shorter ranges than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the frequency band usage designated across these frequency regions may differ by country or regulatory agency.

In some cases, the wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ Licensed Assisted Access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band, such as the 5GHz ISM band. When operating in the unlicensed radio frequency spectrum band, wireless devices, such as base stations 105 and user terminals 115, may employ a Listen Before Talk (LBT) procedure to ensure that frequency channels are clear before transmitting data. In some cases, operation in the unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in the licensed band. Operations in the unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in the unlicensed spectrum may be based on Frequency Division Duplexing (FDD), Time Division Duplexing (TDD), or a combination of both.

In some examples, a base station 105 or user terminal 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. For example, the wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., base station 105) equipped with multiple antennas and a receiving device (e.g., user terminal 115) equipped with one or more antennas. MIMO communication may employ multipath signal propagation to increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Also, the receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiver device; and multi-user MIMO (MU-MIMO), in which a plurality of spatial layers are transmitted to a plurality of devices.

Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting or receiving device (e.g., base station 105 or user terminal 115) to shape or steer an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming may be achieved by combining signals communicated via antenna elements of an antenna array such that signals propagating in a particular orientation relative to the antenna array undergo constructive interference while other signals undergo destructive interference. The adjustment to the signals communicated via the antenna elements may include the transmitting or receiving device applying a particular amplitude and phase shift to the signals carried via each antenna element associated with the device. The adjustment associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to an antenna array of a transmitting device or a receiving device, or relative to some other orientation).

In one example, the base station 105 may use multiple antennas or antenna arrays for beamforming operations for directional communication with the user terminals 115. For example, some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times in different directions by the base station 105, which may include a signal being transmitted according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used to identify beam directions (e.g., by the base station 105 or a receiving device, such as user terminal 115) used by the base station 105 for subsequent transmission and/or reception.

Some signals, such as data signals associated with a particular recipient device, may be transmitted by the base station 105 in a single beam direction (e.g., a direction associated with the recipient device, such as user terminal 115). In some examples, a beam direction associated with transmission along a single beam direction may be determined based at least in part on signals transmitted in different beam directions. For example, the user terminals 115 may receive one or more signals transmitted by the base station 105 in different directions, and the user terminals 115 may report to the base station 105 an indication of the signal for which they received at the highest signal quality or other acceptable signal quality. Although the techniques are described with reference to signals transmitted by base station 105 in one or more directions, user terminal 115 may use similar techniques for transmitting signals multiple times in different directions (e.g., to identify beam directions used by user terminal 115 for subsequent transmission or reception) or for transmitting signals in a single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., user terminal 115, which may be an example of a mmW receiving device) may attempt multiple receive beams when receiving various signals from the base station 105, such as a synchronization signal, a reference signal, a beam selection signal, or other control signals. For example, a recipient device may attempt multiple receive directions by: receiving via different antenna sub-arrays, processing received signals according to different antenna sub-arrays, receiving according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array, either of which may be referred to as "listening" according to different receive beams or receive directions. In some examples, the receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal). The single receive beam may be aligned in a beam direction determined based at least in part on listening from different receive beam directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio, or other acceptable signal quality based at least in part on listening from multiple beam directions).

In some cases, the antennas of a base station 105 or a user terminal 115 may be located within one or more antenna arrays that may support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some cases, the antennas or antenna arrays associated with the base station 105 may be located at different geographic locations. The base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with the user terminals 115. Likewise, user terminal 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.

In some cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communication of the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate on logical channels. The Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use HARQ to provide retransmission by the MAC layer, thereby improving link efficiency. In the control plane, the RRC protocol layer may provide for the establishment, configuration and maintenance of RRC connections of radio bearers supporting user plane data between the user terminal 115 and the base station 105 or core network 130. At the Physical (PHY) layer, transport channels may be mapped to physical channels.

In some cases, the user terminals 115 and base stations 105 may support retransmission of data to increase the likelihood that the data is successfully received. HARQ feedback is a technique that increases the likelihood that data will be correctly received on the communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), Forward Error Correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput of the MAC layer in poor radio conditions (e.g., signal-to-noise conditions). In some cases, a wireless device may support simultaneous slot HARQ feedback, where the device may provide HARQ feedback in a particular slot for data received in a previous symbol in that slot. In other cases, the device may provide HARQ feedback in subsequent time slots or according to some other time interval.

The time interval in LTE or NR may be in a basic unit of time (which may for example refer to the sampling period T)_s1/30,720,000 seconds). The time intervals of the communication resources may be organized according to radio frames each having a duration of 10 milliseconds (ms), where the frame period may be expressed as T_f＝307,200T_s. The radio frame may be identified by a System Frame Number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may be further divided into 2 slots, each having a duration of 0.5ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix preceding each symbol period). Each symbol period may contain 2048 sample periods, excluding the cyclic prefix. In some cases, a subframe may be the smallest scheduling unit of the wireless communication system 100 and may be referred to as a Transmission Time Interval (TTI). In other cases, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected(e.g., in a burst of shortened TTI (sTTI) or in a selected component carrier using sTTI).

In some wireless communication systems, a slot may be further divided into a plurality of mini-slots containing one or more symbols. In some examples, a symbol of a mini-slot or a mini-slot may be a minimum scheduling unit. For example, each symbol may vary in duration depending on the subcarrier spacing or operating frequency band. Further, some wireless communication systems may implement timeslot aggregation, where multiple timeslots or mini-timeslots are aggregated together and used for communication between the user terminals 115 and the base station 105.

The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over the communication link 125. For example, the carrier of the communication link 125 may comprise a portion of a radio frequency spectrum band operating according to a physical layer channel for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. The carriers may be associated with predefined frequency channels (e.g., evolved universal mobile telecommunications system terrestrial radio access (E-UTRA) absolute radio frequency channel numbers (EARFCN)) and may be located according to a channel grid for discovery by user terminals 115. The carriers may be downlink or uplink (e.g., in FDD mode), or configured to carry downlink and uplink communications (e.g., in TDD mode). In some examples, a signal waveform transmitted on a carrier may include multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique, such as Orthogonal Frequency Division Multiplexing (OFDM) or DFT-S-OFDM).

The organization of the carriers may be different for different radio access technologies (e.g., LTE-A, LTE-A Pro, NR). For example, communications on a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling supporting decoding of the user data. The carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) and control signaling that coordinates operation of the carrier. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers.

The physical channels may be multiplexed on the carriers according to various techniques. The physical control channels and physical data channels may be multiplexed on the downlink carrier using, for example, Time Division Multiplexing (TDM) techniques, Frequency Division Multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples, control information transmitted in the physical control channel may be distributed in a cascaded manner between different control regions (e.g., between a common control region or common search space and one or more user terminal-specific control regions or user terminal-specific search spaces).

A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as a carrier or "system bandwidth" of the wireless communication system 100. For example, the carrier bandwidth may be one of several predetermined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80MHz) of a carrier of a particular radio access technology. In some examples, each served user terminal 115 may be configured to operate over part or all of the carrier bandwidth. In other examples, some user terminals 115 may be configured for operation using a narrowband protocol type associated with a predefined portion or range within a carrier (e.g., a set of subcarriers or RBs) (e.g., "in-band" deployment of narrowband protocol types).

In a system employing MCM technology, a resource element may include one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme). Thus, the more resource elements a user terminal 115 receives and the higher the order of the modulation scheme, the higher the data rate of the user terminal 115 may be. In a MIMO system, wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers), and using multiple spatial layers may further improve the data rate of communication with user terminals 115.

Devices of the wireless communication system 100 (e.g., base stations 105 or user terminals 115) may have a hardware configuration that supports communication over a particular carrier bandwidth or may be configurable to support communication over one carrier bandwidth of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 and/or a user terminal 115 that supports simultaneous communication via carriers associated with more than one different carrier bandwidth.

The wireless communication system 100 may support communication with user terminals 115 over multiple cells or carriers, a feature that may be referred to as carrier aggregation or multi-carrier operation. User terminal 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both FDD and TDD component carriers.

In some cases, the wireless communication system 100 may utilize an enhanced component carrier (eCC). An eCC may be characterized by one or more characteristics including a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum). An eCC characterized by a wide carrier bandwidth may include one or more segments that may be utilized by user terminals 115 that are unable to monitor the entire carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to conserve power).

In some cases, an eCC may utilize a different symbol duration than other component carriers, which may include using a reduced symbol duration compared to the symbol duration of the other component carriers. Shorter symbol durations may be associated with increased spacing between adjacent subcarriers. Devices utilizing an eCC, such as user terminal 115 or base station 105, may transmit a wideband signal (e.g., according to a frequency channel or carrier bandwidth of 20, 40, 60, 80MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds). A TTI in an eCC may include one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in a TTI) may be variable.

The wireless communication system 100 may be an NR system that may utilize any combination of licensed, shared, and unlicensed spectrum bands, etc. Flexibility in eCC symbol duration and subcarrier spacing may allow eCC to be used across multiple spectra. In some examples, NR sharing spectrum may improve spectrum utilization and spectral efficiency, particularly through dynamic vertical (e.g., across frequency domains) and horizontal (e.g., across time domains) sharing of resources.

The wireless communication system 100 may also include one or more satellites 120. Satellite 120 may communicate with base stations 105 and user terminals 115 (such as UEs). Satellite 120 may be any suitable type of communications satellite configured to relay communications between different end nodes in a wireless communications system. The satellites 120 may be examples of space satellites, balloons, airships, airplanes, drones, unmanned vehicles, and the like. In some examples, the satellites 120 may be in geosynchronous or geostationary, low-earth, or mid-earth orbits. Satellite 120 may be a multi-beam satellite configured to provide service for a plurality of service beam coverage areas in a predefined geographic service area. The satellites 120 may be any distance from the surface of the earth.

In some cases, the cell may be provided or established by the satellite 120 as part of a non-terrestrial network. In some cases, satellite 120 may perform the functions of base station 105, act as a bent pipe satellite, or may act as a regeneration satellite, or a combination thereof. In other cases, satellite 120 may be an example of a smart satellite or a satellite with intelligence. A bent tube transponder or satellite may be configured to receive signals from a ground station and transmit those signals to a different ground station. In some cases, a bent-tube transponder or satellite may amplify the signal or transition from an uplink frequency to a downlink frequency. The regenerative transponder or satellite may be configured to relay signals like a bent-tube transponder or satellite, but other functions may be performed using on-board processing. Examples of those other functions may include demodulating the received signal, decoding the received signal, re-encoding the signal to be transmitted, or modulating the signal to be transmitted, or a combination thereof. For example, a bent pipe satellite (e.g., satellite 120) may receive a signal from base station 105 and may relay the signal to user terminal 115 or base station 105, or vice versa.

The user terminal 115 may include a communication manager 101 that may manage communications in a non-terrestrial network communication system. For the user terminal 115, the communication manager 101 may transmit a first message to the base station 105 indicating the capability of the user terminal 115 (which may be an example of a user terminal) to participate in the configurable acknowledgement process. The communication manager 102 may also receive a second message from the base station 105 indicating a configurable acknowledgement procedure, wherein the configurable acknowledgement procedure is based on the capabilities of the user terminal 115. The communication manager 102 may determine a parameter for the configurable acknowledgement process based on the second message and may perform the configurable acknowledgement process based on the parameter.

One or more of the base stations 105 may also include a communication manager 102 that may manage communications in the non-terrestrial network communication system. For the base station 105, the communication manager 102 may receive a first message from a user terminal 115 (e.g., a user terminal) indicating a capability of the user terminal 115 to participate in a configurable acknowledgement process. The communication manager 102 may also determine parameters for the configurable acknowledgement procedure based on the capabilities of the user terminal 115, and may transmit a second message to the user terminal 115 indicating the configurable acknowledgement procedure and the parameters.

Fig. 2A illustrates an example of a wireless communication system 200 that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100.

The wireless communication system 200 may include a base station 105-a, a user terminal 115-a, and a satellite 120-a, which may be examples of the base station 105, the user terminal 115, and the satellite 120 described with reference to fig. 1. The base station 105-a may be configured to serve a geographic coverage area 110-a by way of a satellite 120-a. In some cases, satellite 120-a may relay communications between base station 105-a and user terminal 115-a.

The base station 105-a may communicate with the user terminal 115-a via a satellite 120-a. The RRC protocol may provide for the establishment, configuration, and maintenance of RRC communications between the user terminal 115-a and the base station 105-a via the satellite 120-a. The base station 105-a may communicate with the user terminal 115-a via the satellite 120-a based on a communication protocol defined in RRC in the control plane. The communication protocol may include HARQ processes that may be configured based on propagation delays of signals communicated between the base station 105-a and the user terminal 115-a.

For communications originating at the base station 105-a and destined for the user terminal 115-a, the base station 105-a may transmit an uplink message 205-a to the satellite 120-a. The uplink message may be transmitted to the satellite 120-a as the first uplink message 205-a. The satellite 120-a may relay the uplink message 205-a to the user terminal 115-a as the first downlink message 205-b.

For communications originating at the user terminal 115-a and destined for the base station 105-a, the user terminal 115-a may transmit an uplink message 210-a to the satellite 120-a. The satellite 120-a may relay the uplink message 210-a to the base station 105-b as a downlink message 210-b.

Some messages communicated between the base station 105-a and the user terminal 115-a may use one or more HARQ processes as part of error detection and correction of those messages. The HARQ process may include a message transmission and a response including an Acknowledgement (ACK) or Negative Acknowledgement (NACK) message. For example, the base station 105-a may transmit the message 205 to the user terminal 115-a via the satellite 120-a. The user terminal 115-a may respond by transmitting an ACK or NACK message in transmission 210 via the satellite 120-a to the base station 105-a. The HARQ process may include a number of retransmissions and responses. In some cases, the HARQ process may be configured with a maximum number of retransmissions after which the HARQ process is considered complete regardless of whether the message was successfully decoded.

In some cases, the satellite 120-a may be in orbit (such as a near earth orbit, a mid earth orbit, or a geostationary orbit). In any of these scenarios, the satellite may be thousands of kilometers from earth, and thus may be thousands of kilometers from base station 105-a and user terminal 115-a. Each transmission or message 205 or 210 between the base station 105-a and the user terminal 115-a may thus travel that distance from earth to the satellite 120-a and back to earth. The distance traveled by the transmission may increase the propagation delay of the transmission or the round trip delay associated with the transmission. Propagation delay may refer to the duration a signal takes to travel from its source to its intended recipient. Round-trip delay may refer to the duration that it takes for a signal to be transmitted from a source to its intended recipient, processed by the intended recipient, and transmitted back to the source in response to an intended recipient of a first message.

When satellite 120-a is in low earth orbit, the satellite may be between 600km and 1500km from the earth. In the case of a low earth orbit location of the satellite 120-a, the round trip delay for the base station 105-a to receive the ACK/NACK from the user terminal 115-a after transmitting the initial message may be on the order of 8 milliseconds (ms). If the altitude of satellite 120-a is 1200km, the round-trip delay may be up to 40 ms. Furthermore, in situations where the satellite 120-a may be in geostationary orbit, the round-trip delay between the base station 105-a and the user terminal 115-a may be up to 600 ms. For comparison, in a terrestrial cell that does not use satellite relay messages, the round-trip delay between base station 105-a and user terminal 115-a that are 100km away may be on the order of 333 microseconds (μ s). HARQ processes may be dynamically or semi-statically configurable to address issues related to such large propagation delays and round trip times.

Fig. 2B illustrates an example of a transmission diagram 202 supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. In some examples, the transmission diagram 202 may implement aspects of the wireless communication system 100 or 200.

Diagram 202 may be a representation of communications between base station 105-a and user terminal 115-a. For example, reference line 203-a may represent a source node of a network (e.g., base station 105-a or user terminal 115-a, depending on the communication), while reference line 203-b may represent an intended recipient node of the network (e.g., base station 105-a or user terminal 115-a, depending on the communication).

The base stations 105 and user terminals 115 may communicate messages via relay satellites 120. Some messages may use one or more HARQ processes to improve the reliability of the message. In a HARQ process, a communication system may be configured such that an initiating device (e.g., a base station 105 that transmits an initial HARQ message and expects an ACK/NACK response) may expect to transmit at least one message and receive at least one uplink message. For HARQ processes associated with a single transmission, in some cases, the base station 105-a or user terminal 115-a initiating the first HARQ transmission may not begin the second HARQ transmission (or sometimes referred to as a HARQ retransmission) until it has received an ACK/NACK message associated with the first HARQ transmission. Due to the long round trip delay corresponding to wireless communications including relay satellite 120, the duration of the HARQ window associated with the ACK/NACK may be quite long, which may result in communication delays.

For example, delayed reception of an ACK/NACK during a HARQ process may interrupt the operation of a timer in the Transmission Control Protocol (TCP). For example, TCP may analyze the delay as related to network congestion, not necessarily to round-trip delay caused by the distance between the satellite and the transmitting and receiving devices (e.g., base station 105 and user terminal 115). Because of this incorrect analysis, some of the transmitted packets may be lost.

Transmission 204-a may represent an initial transmission from base station 105 to user terminal 115. The transmission 204-a may be transmitted to the user terminal 115 via the relay satellite 120. Transmission 209-a may represent an ACK/NACK message from the user terminal 115 to the base station 105 based on transmission 204. The transmission 209-a may be transmitted to the base station 105 via the relay satellite 120. The transmission 204-a may be transmitted by the base station 105 in the first HARQ window 222. Duration 223 may represent a round trip delay from the initial transmission 204-a of the base station 105 to the reception of the ACK/NACK 209-a by the base station 105 after the ACK/NACK is transmitted from the user terminal 115-a.

In many scenarios involving HARQ communications between base station 105 and user terminal 115 relayed by satellite 120, HARQ window 222 may be shorter than duration 223 of the round trip delay. Thus, in these cases, the transmission 209-a may not be received by the base station 105 from the user terminal 115 until after the end of the first HARQ window 222. As the HARQ window is excessively extended, the user terminal may want to transmit a HARQ transmission, but the likelihood of failing to transmit due to other HARQ processes not yet solved or completed increases. This may delay further communication because base station 105-a may not transmit the next transmission 214-a until receiving the ACK/NACK 209-a. Thus, transmission 214-a may be delayed, resulting in yet further delay in the communication. These delays may propagate through further transmissions and may result in latency and packet loss in the communication system.

Furthermore, such a large round trip delay may increase the number of HARQ processes that user terminal 115-a may want to maintain in parallel. For each HARQ process, user terminal 115-a may maintain a buffer for storing information related to the HARQ process. In some cases, user terminal 115-a may be configured to support a maximum number of HARQ processes (e.g., a maximum number of HARQ buffers). Such a large round trip time may result in user terminal 115-a being operating all of the maximum number of HARQ processes and still wanting to send additional messages using HARQ.

Due to the limitations of the configuration specifying four HARQ retransmissions, duration 224 is not used for any transmission to or from base station 105 or user terminal 115. Transmissions 204-b, 204-c, and 204-d may be retransmissions of initial transmission 204-a. Round-trip delays may also occur in systems without relay satellites 120. For example, if the base station 105 and the user terminal 115 are far apart, there may be a long round trip delay between the base station 105 and the user terminal 115, which may result in similar delays and communication latencies.

Fig. 3A to 3C illustrate different configurations for coping with HARQ processes of a network including an increased round trip delay time. Each figure illustrates one or more parameters of a HARQ process that may be configured (e.g., dynamically or semi-statically) for use in a network that includes an increased round-trip delay time. The features and techniques described with reference to fig. 3A through 3C may be combined in various ways to establish a HARQ process or HARQ procedure that is effective for a given network.

Fig. 3A illustrates an example of a transmission diagram 301 supporting a dynamically configurable acknowledgement procedure in accordance with aspects of the present disclosure. In some examples, transmission diagram 301 may implement aspects of wireless communication systems 100 and 200.

Diagram 301 illustrates a scenario where HARQ retransmissions may be disabled or the maximum number of HARQ retransmissions may be limited. For example, the network (e.g., base station 105-a) may dynamically or semi-statically select the maximum number of HARQ retransmissions used by the HARQ process. Diagram 301 may include reference line 320-a and reference line 320-b, with reference line 320-a representing a source (e.g., base station 105-a or user terminal 115-a) transmitting a communication and reference line 320-b representing an intended recipient (e.g., base station 105-a or user terminal 115-a) of the communication.

In some cases, the configuration of HARQ retransmissions may be disabled. In such a case, each transmission 310 between the source and the intended recipient carries unique data (e.g., there are no HARQ retransmissions being transmitted). In some implementations, disabling HARQ may be done on a user terminal-by-user terminal basis. In some implementations, disabling HARQ may be done on a cell-by-cell basis.

In some cases, the maximum number of HARQ retransmissions may be configured for the HARQ process. For example, in some wireless systems, the maximum number of HARQ retransmissions may be three (e.g., for a message, including a total of four transmissions for the original transmission). The maximum number of HARQ retransmissions may be selected between the number of HARQ retransmissions 0, 1, 2, 3, 4, 5, 6, 7, 8, etc.

Base station 105-a may use RRC signaling when signaling HARQ disabled or a maximum number of HARQ retransmissions. For example, the base station 105-a may transmit an RRC signal that semi-statically disables HARQ. In some cases, base station 105-a may transmit Downlink Control Information (DCI) that sometimes temporarily enables or disables HARQ. In some implementations, disabling or enabling the HARQ process may be accomplished using a single bit in the message. In some implementations, RRC signaling may be used to semi-statically configure HARQ with a maximum allowed number of HARQ retransmissions, and DCI may be configured to temporarily disable HARQ processes.

The maximum number of signaling HARQ disablement or signaling HARQ retransmissions may be implemented using various different indicators. In some cases, the maximum number of HARQ-disabled or signaled HARQ retransmissions may be indicated using a single bit. In some cases, the maximum number of HARQ-disabled or signaled HARQ retransmissions may be indicated using more than one bit. In some cases, the maximum number of HARQ-disabled or signaled HARQ retransmissions may be indicated using the reserved HARQ identifier. When using the reserved HARQ identifier, both the base station 105-a and the user terminal 115-a may be configured to know the HARQ configuration associated with the reserved HARQ identifier.

In some cases, there may be an increased limit to the maximum number of HARQ retransmissions per HARQ process. For example, the maximum number of HARQ retransmissions may be zero, one, two, or three retransmissions. In many cases, sixteen (16) HARQ processes may be configured to operate in parallel, with each HARQ process being assigned up to four HARQ transmissions (e.g., including up to three HARQ retransmissions of the original transmission).

In other cases, the HARQ disabling configuration may be dynamically signaled through DCI transmitted by the base station 105 to the user terminals 115. The DCI may indicate a temporary override to the HARQ process, which may include an increased limit on the number of message retransmissions. The DCI indicating the temporary override and HARQ disablement may appear in an initial message transmitted from the base station 105 to the user terminal 115.

Disabling HARQ or reducing the maximum number of HARQ retransmissions may be managed by base station 105-a using buffer-related signaling. After transmitting the message (whether the first message or some subsequent retransmission), base station 105-a may transmit a command to flush or terminate the HARQ process. In some cases, a command to flush or terminate a HARQ process may appear in a downlink message — in a New Data Indicator (NDI) of the downlink message. In some cases, the command to flush the buffer or terminate the HARQ process may include a Code Block Group Transmission Information (CBGTI) indicator, a code block group clear information (CBGFI) indicator, or a combination thereof. When user terminal 115-a receives an indication to flush the buffer or terminate the HARQ process, user terminal 115-a may execute the received command. In some cases, user terminal 115-a may transmit an ACK/NACK that the buffer has been flushed or the HARQ process terminated.

In some cases, HARQ may be disabled to avoid excessive delay between the first transmission and subsequent retransmissions when the round trip delay time is large. RRC signaling may be used to semi-statically configure HARQ to be disabled, and DCI may use a single bit to temporarily enable HARQ to operate. In some cases, RRC signaling may be used to semi-statically disable HARQ, and DCI may temporarily enable HARQ based on one or more bits to operate using a fractional number of retransmissions. In some cases, RRC signaling may be used to semi-statically configure HARQ with some number of allowed retransmissions based on a number of bits, and DCI may temporarily disable HARQ with a single bit or a reserved HARQ ID. The configuration of the number of retransmissions may occur through RRC or MAC-CE configuration signaling.

The base station 105 may terminate the HARQ process at any point throughout the communication. The base station 105 may terminate HARQ using NDI, CBGTI, CBGFI, or a combination thereof. Terminating the HARQ process may reduce the number of retransmissions for HARQ or may disable the HARQ process altogether to include more initial transmissions based on the timing at which the base station 105-a sent such an indicator.

To address the problems associated with reducing the maximum number of HARQ transmissions or disabling HARQ altogether, the base station may target a lower block error rate (BLER) for transmissions. To reduce the BLER of an initial transmission (or subsequent transmissions, as the case may be), the base station may use different Modulation and Coding Schemes (MCSs). In some cases, different MCS tables may be used for different HARQ configurations. When the maximum number of HARQ retransmissions is limited, base station 105-a may use a lower MCS than that used for the standard maximum number of HARQ retransmissions. For example, the base station 105 may negatively offset one or more channel quality indicators to indicate a lower MCS selection. The base station 105 indicating a reduced retransmission configuration or disabling of HARQ processes may also indicate or include a specific MCS table for this type of HARQ process. A lower BLER may increase accurate transmission because in this configuration, there are fewer or no retransmissions. As such, a lower BLER may contribute to accuracy in communication configurations where there may be little or no redundancy. In case the communication configuration comprises retransmissions, the retransmissions may instead be handled by the Radio Link Control (RLC) layer instead of in the HARQ retransmission process.

Fig. 3B illustrates an example of a transmission diagram 302 that supports a dynamically configurable acknowledgement procedure in accordance with aspects of the present disclosure. In some examples, the transmission diagram 302 may implement aspects of the wireless communication systems 100 and 200.

Diagram 302 illustrates a scenario in which the maximum number of HARQ processes may be configurable (e.g., increased). For example, the network (e.g., base station 105-a) may dynamically or semi-statically select the maximum number of parallel-running HARQ processes to support based on the capabilities of the user terminal. Diagram 302 may include reference line 320-c and reference line 320-d, where reference line 320-c represents a source (e.g., base station 105-a or user terminal 115-a) transmitting a communication and reference line 320-d represents an intended recipient (e.g., base station 105-a or user terminal 115-a) of the communication.

In the event that the network identifies that the round trip delay time may have a negative impact on the HARQ processes, the network may increase the maximum number of HARQ processes that can be run in parallel. The number of HARQ processes may be limited by the capabilities of the user terminal. For example, the number of HARQ processes running in parallel may be limited by the number of buffers for HARQ processes that the user terminal can maintain at one time. The maximum number of HARQ processes running in parallel may be dynamically or semi-statically configured based on propagation delay or round trip delay time. The number of HARQ processes may be increased to fill in gaps caused by round trip delay. The user terminal 115-a may transmit a message including the capabilities of the user terminal. The base station 105-a may select the maximum number of HARQ processes that may be run in parallel based on receiving a message from the user terminal 115-a indicating its capabilities. An example of such a technique may be illustrated by diagram 302. Within the first HARQ window 306, the maximum number of HARQ processes within a slot may be increased. For example, in some wireless communication systems, up to sixteen (16) parallel HARQ processes may be supported, but the maximum number of parallel HARQ processes within the HARQ window 306 may be greater than sixteen. Transmission 310 represents a HARQ transmission from a source to an intended recipient and transmission 315 represents a response.

The base station 105-a and the user terminal 115-a may adapt the processes to be able to distinguish a larger number of HARQ processes running in parallel. In some cases, the HARQ identifier field in the control signaling (e.g., DCI) may be extended to be greater than four bits. In such a case, base station 105-a or user terminal 115-a may be configured to identify the HARQ process using an extended HARQ identifier (e.g., greater than four bits). In some cases, the size (e.g., bit width variation) of the HARQ identifier field in the control information (e.g., DCI) may be configured.

In some cases, the number of identifiable HARQ processes running in parallel may be increased while maintaining the HARQ identifier field bit width. The HARQ process may be identified based on a HARQ identifier (e.g., equal to or less than four bits) and based on at least one of a slot number, a time, or a subframe count. In practice, the HARQ process may be indexed by the HARQ identifier and by at least one of a slot number, time, or subframe count. Examples of such indices are described herein. The HARQ identifier field or HARQ identifier may be configured to four bits or less. To maintain the size of the HARQ identifier field or HARQ identifier while increasing the number of HARQ processes operating in parallel, the HARQ identifier field or HARQ identifier may be grouped into a number of HARQ identifier groups. Each HARQ identifier group may be indexed using a slot number, time, or subframe count. In this way, a single HARQ identifier may be configured to refer to more than one unique HARQ process based on an index value (e.g., slot number, time, or subframe count) associated with the HARQ identifier. A transmitting device (e.g., base station 105-a) may cycle through HARQ identifiers in one group, and then move to the next group and cycle through those HARQ identifiers. For example, a first time slot may be associated with a first HARQ identifier group, while a second time slot may be associated with a second HARQ identifier group different from the first group. The HARQ identifier may be reused between the two groups, but base station 105-a and user terminal 115-a may be configured to identify the HARQ process using both the HARQ identifier and an index value (in this case, a slot number).

After having cycled through the number of groups, the HARQ procedure may start reusing HARQ identifiers from previous groups. In the example described below, there are two HARQ identifier groups. Subsequent slots may cycle through the HARQ groups. For example, as shown in table 1, a first time slot may be associated with a first group, a second time slot may be associated with a second group, and a third time slot may again be associated with the first group, and so on. The index value may be a function of time, System Frame Number (SFN) or subframe count, or a combination thereof. In some cases, the HARQ process may be identified based on the following equation:

HARQ ID + in DCI (subframe number × 2)^μX 10+ time slot number) mod k) × 16 ═ HARQ process

(1)

Here, k may represent the number of HARQ identifier groups.

Table 1 may be an example of the results obtained using the above equation to identify the HARQ process. For example, as shown in table 1, a first time slot may be associated with a first group, a second time slot may be associated with a second group, and a third time slot may again be associated with the first group, and so on. For example, when k is equal to 2, the following table may indicate the number of HARQ processes corresponding to the number of HARQ processes in the slot. In such a HARQ configuration, the number of HARQ processes operating in parallel may be increased.

Table 1: HARQ ID cycle table

The number of HARQ processes running in parallel may affect the number of ACK/NACK bits that can be grouped into a single transmission. In downlink communications from the base station 105-a to the user terminal 115-a, the single transmission may be an example of a Physical Uplink Control Channel (PUCCH) transmission or a Physical Uplink Shared Channel (PUSCH) transmission. In some cases, this may result in a larger size of the ACK/NACK payload in such signals. In some cases, the size of the ACK/NACK payload may be limited to a suitable size in existing wireless communication systems. In some cases, base station 105-a may be configured to modify the maximum size of the ACK/NACK payload in the signal dynamically or semi-statically. For example, the base station 105-a may configure the number of ACK/NACK bits to be encoded or rate matched or both in one PUCCH or PUSCH transmission based on the type of communication system (e.g., 4G, 5G, LTE, NR, non-terrestrial network, etc.).

Fig. 3C illustrates an example of a transmission diagram 303 supporting a dynamically configurable acknowledgement procedure in accordance with aspects of the present disclosure. In some examples, the transmission diagram 303 may implement aspects of the wireless communication systems 100 and 200.

Diagram 303 illustrates a scenario in which a transmission size associated with a HARQ process may be configured to fill a propagation delay window. Such a scenario may be used when the maximum number of HARQ processes running in parallel cannot be increased any further. Diagram 303 may include reference line 320-e and reference line 320-f, where reference line 320-e represents a source (e.g., base station 105-a or user terminal 115-a) transmitting a communication and reference line 320-f represents an intended recipient (e.g., base station 105-a or user terminal 115-a) of the communication.

The size of the HARQ transmission may be extended to reduce the amount of time loss due to propagation delay. The size of the HARQ transmission may be dynamically configurable or semi-statically configurable. In some cases, the HARQ transmission may span multiple slots. The size of a Transport Block (TB) for HARQ transmission may be enlarged. In some cases, code blocks from multiple TBs may be grouped and then the grouped code blocks may be transmitted over multiple slots.

When configuring the size of the HARQ transmission, the base station 105-a may also use a different MCS value compared to the MCS value of the standard HARQ transmission size. In some cases, additional MCS table entries in the MCS table may be used for multi-slot HARQ configurations. In some cases, different MCS tables may be used for multi-slot HARQ configurations. The base station 105-a may be configured to communicate the updated MCS table or to communicate an indication of which MCS table is being used as part of configuring the size of the HARQ transmission. The MCS values for such configurations may be configured to target a lower coding rate or a lower BLER. In some cases, even if Code Block Group (CBG) based retransmissions are used, the retransmissions may still be delayed. Such scenarios may also include introducing different time domain configurations for allocations in the DCI for scheduling uplink and downlink between the user terminal and the base station.

The parameters of such configured HARQ processes may include a size of the HARQ transmission, an indicator that the HARQ transmission may span more than one slot, an indicator related to code block grouping, an indicator regarding an MCS value or an MCS table, or a combination thereof. The configuration may also include an indicator of the TB size associated with the HARQ transmission. The size of the HARQ transmission may be configured to fill a propagation delay window associated with the round trip delay of the configurable ACK/NACK process.

For example, multiple HARQ transmissions 310 may be transmitted from a source to an intended recipient via the relay satellite 120 during the delay window 307. The delay window 307 may represent a duration between transmitting a message and receiving a response 315 associated with the message. The size of each of the plurality of HARQ transmissions 310 transmitted during the deferral window may be selected based on the round trip delay. In such a configuration, the size of the HARQ transmission may be selected such that at least one HARQ process will resolve before the maximum number of parallel HARQ processes is exceeded. The response 315 (e.g., ACK/NACK) may be transmitted by the user terminal 115-a to the base station 105-a via the relay satellite 120. The size of response 315 may also be configurable.

Fig. 4 illustrates an example process flow 400 supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. In some examples, process flow 400 may implement aspects of wireless communication systems 100 and 200. Process flow 400 may illustrate communications between a base station 105-b, a user terminal 115-b, and a satellite 120-b. The base station 105-b, the user terminal 115-b, and the satellite 120-b may each be an example of the base station 105, the user terminal 115, and the satellite 120 described with reference to fig. 1 and 2A.

At 405, the user terminal 115-b may transmit a first message to the base station 105-b indicating the user terminal's 115-b ability to participate in the configurable ACK process. The first message may be transmitted to base station 105-b via relay satellite 120-b. The base station 105-b may receive a first message from the user terminal 115-b.

At 410, the base station 105-b may determine parameters for a configurable acknowledgement process (e.g., a HARQ process) based on the capabilities of the user terminal 115-b. Examples of configurable parameters may include a maximum number of retransmissions for each HARQ process, whether HARQ is disabled, a maximum number of HARQ processes running in parallel, a size of HARQ transmission, or a combination thereof.

At 415, the user terminal 115-b may receive a second message from the base station 105-b indicating one or more parameters related to the acknowledgement procedure. The configurable acknowledgement process may be based on the capabilities of the user terminal 115-b. Base station 105-b may transmit the second message via relay satellite 120-b.

In some cases, the second message may include RRC signaling configured to disable HARQ retransmissions. In other cases, the second message may include DCI including information configured to disable HARQ retransmissions. The second message may also include a system information block.

At 420, user terminal 115-b may determine parameters for the configurable acknowledgement procedure based on the second message. User terminal 115-b may identify that the wireless communication link used to communicate the second message associated with the configurable ACK process is part of a non-terrestrial network. The user terminal 115-b may determine the parameter based on identifying that the wireless communication link is part of a non-terrestrial network. The user terminal 115-b may determine that a round trip delay associated with a configurable ACK process between the base station 105-b and the user terminal 115-b may satisfy a threshold, and the user terminal 115-b may determine the parameter based on determining that the round trip delay satisfies the threshold. User terminal 115-b may identify that a propagation delay window between transmitting the message and receiving the ACK or NACK satisfies a threshold. User terminal 115-b may determine the parameter based on determining that the propagation delay window satisfies the threshold. Determining the parameters may also further include reducing a maximum number of HARQ retransmissions allowed during the configurable ACK process based on receiving the second message. The parameter may include a maximum number of HARQ retransmissions. User terminal 115-b may also identify MCS information associated with the maximum number of HARQ retransmissions. In some cases, performing the configurable ACK procedure may be based on identifying the MCS.

Determining the parameters may also include the user terminal 115-b determining to disable HARQ retransmissions associated with the one or more messages. In some cases, the parameter may indicate whether the maximum number of HARQ retransmissions is equal to zero. In other cases, the maximum number of HARQ retransmissions may be equal to or greater than zero.

The user terminal 115-b may identify the HARQ identifier indicating that HARQ retransmission is disabled based on the user terminal 115-b receiving the second message. The second message may include the identified HARQ identifier.

User terminal 115-b may flush one or more buffers associated with the configurable ACK process based on receiving the second message. The second message may include an indicator to cause user terminal 115-b to flush one or more buffers associated with the configurable ACK process. The indicator may include a New Data Indicator (NDI), a code block transmission information (CBGTI) indicator, a code block group clear information (CBGFI) indicator, or a combination of both. The second message may also include a HARQ ACK configured to cause user terminal 115-b to flush a buffer associated with the configurable ACK process.

In other cases, determining the parameter may include the user terminal 115-b determining a number of parallel HARQ processes between the base station 105-b and the user terminal 115-b. In some cases, the number of parallel HARQ processes is greater than sixteen HARQ processes. The first message may also indicate the number of buffers that user terminal 115-b may configure to use for the parallel HARQ process. Further, the number of parallel HARQ processes may be based on the number of buffers. The second message may include a HARQ identifier that may have five or more bits.

User terminal 115-b may identify the HARQ identifier and may identify at least one of a slot number, a time, or a subframe count. User terminal 115-b may also identify a first HARQ process of the number of parallel HARQ processes based on the HARQ identifier and based on at least one of a slot number, a time, or a subframe count. Base station 105-b may transmit the second message based on identifying the first HARQ process. A first HARQ process of the number of parallel HARQ processes is indexed by the HARQ identifier and by at least one of a slot number, a time, or a subframe count.

User terminal 115-b may configure the number of ACK or NACK bits included in a single message associated with the number of parallel HARQ processes. The user terminal 115-b may transmit a single message with the number of ACK or NACK bits based on receiving the second message by the base station 105-b.

In other cases, user terminal 115-b may determine the parameter by determining that the HARQ transmission spans more than one slot, where the parameter may include the size of the HARQ transmission. User terminal 115-b may determine the size of the transport block associated with the HARQ transmission. User terminal 115-b may determine that the HARQ transmission spans more than one slot based on determining the size of the transport block. User terminal 115-b may receive one or more grouped code blocks from multiple TBs over multiple time slots. In this case, the size of the HARQ transmission may be configured to fill a propagation delay window associated with the round trip delay of the configurable acknowledgement process.

At 425, user terminal 115-b may transmit a response message (e.g., an ACK/NACK message) as part of the acknowledgement process.

Fig. 5 illustrates a block diagram 500 of a device 505 that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The device 505 may be an example of aspects of a UE 115 as described herein. The device 505 may include a receiver 510, a communication manager 515, and a transmitter 520. The device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

Receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to dynamically configurable acknowledgement procedures, etc.). Information may be passed to other components of device 505. The receiver 510 may be an example of aspects of the transceiver 820 described with reference to fig. 8. Receiver 510 may utilize a single antenna or a set of antennas.

The communication manager 515 may receive a message from the base station indicating configurable HARQ processes that are configurable on a per-HARQ process basis; determining parameters for the configurable HARQ process based on the message; and performing the configurable HARQ process based on the parameter. The communication manager 515 may also receive, at the user terminal, a message indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal; determining a maximum number of parallel HARQ processes supported between the base station and the user terminal according to the message; and performing one or more HARQ processes based on the maximum number. The communication manager 515 may be an example of aspects of the communication manager 810 described herein.

The communication manager 515 or its subcomponents may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 515 or subcomponents thereof may be performed by a general purpose processor, a DSP, an Application Specific Integrated Circuit (ASIC), an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

The communication manager 515, or subcomponents thereof, may be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, the communication manager 515 or subcomponents thereof may be separate and distinct components, in accordance with various aspects of the present disclosure. In some examples, the communication manager 515 or subcomponents thereof may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof, in accordance with various aspects of the present disclosure.

The transmitter 520 may transmit signals generated by other components of the device 505. In some examples, the transmitter 520 may be co-located with the receiver 510 in a transceiver module. For example, the transmitter 520 may be an example of aspects of the transceiver 820 described with reference to fig. 8. The transmitter 520 may utilize a single antenna or a set of antennas.

Fig. 6 illustrates a block diagram 600 of a device 605 that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The device 605 may be an example of aspects of the device 505 or the UE 115 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 635. The device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

Receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to dynamically configurable acknowledgement procedures, etc.). The information may be passed to other components of the device 605. The receiver 610 may be an example of aspects of the transceiver 820 described with reference to fig. 8. Receiver 610 may utilize a single antenna or a set of antennas.

The communication manager 615 may be an example of aspects of the communication manager 515 as described herein. The communication manager 615 may include a message receiver 620, a parameter determination component 625, and a HARQ performing component 630. The communication manager 615 may be an example of aspects of the communication manager 810 described herein.

The message receiver 620 may receive a message from a base station indicating configurable HARQ processes that are configurable on a per-HARQ process basis. Parameter determining component 625 may determine parameters for the configurable HARQ process based on the message. HARQ performing component 630 may perform the configurable HARQ process based on the parameter.

The message receiver 620 may receive a message at a user terminal indicating a maximum number of parallel HARQ processes supported between a base station and the user terminal. Parameter determining component 625 can determine a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. HARQ performing component 630 may perform one or more HARQ processes based on the maximum number.

Transmitter 635 may transmit signals generated by other components of device 605. In some examples, the transmitter 635 may be co-located in a transceiver module with the receiver 610. For example, the transmitter 635 may be an example of aspects of the transceiver 820 described with reference to fig. 8. The transmitter 635 may utilize a single antenna or a set of antennas.

Fig. 7 illustrates a block diagram 700 of a communication manager 705 that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The communication manager 705 may be an example of aspects of the communication manager 515, the communication manager 615, or the communication manager 810 described herein. Communication manager 705 may include a message receiver 710, a parameter determination component 715, a HARQ performing component 720, an RTD determining component 725, a deferral window identifier 730, an MCS identifier 735, a HARQ identifying component 740, a flushing component 745, a code block receiver 750, a HARQ configuring component 755, and a message transmitter 760. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

Message receiver 710 can receive a message from a base station indicating configurable HARQ processes that are configurable on a per-HARQ process basis. In some examples, the message receiver 710 may receive a message at a user terminal indicating a maximum number of parallel HARQ processes supported between a base station and the user terminal. In some cases, the message is received via a communication link in a non-terrestrial network, and wherein determining the parameter is based on the wireless communication link being part of the non-terrestrial network.

Parameter determining component 715 may determine parameters for the configurable HARQ process based on the message. In some examples, parameter determining component 715 may determine a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. In some examples, parameter determining component 715 may reduce the maximum number of HARQ retransmissions allowed during the configurable HARQ process based on receiving the message. In some examples, parameter determining component 715 may determine to disable one or more features associated with one or more transport blocks in the HARQ process. In some examples, the HARQ transmission is determined to span more than one slot, wherein the parameter comprises a size of the HARQ transmission.

In some cases, the parameter indicates whether HARQ combining is used to perform the configurable HARQ process. In some cases, the parameter indicates that a positive or negative acknowledgement will follow the data transmission. In some cases, the message is received via RRC signaling or in a SIB. In some cases, the maximum number of parallel HARQ processes is based on a number of buffers that the user terminal may configure to use for the parallel HARQ processes.

HARQ performing component 720 may perform the configurable HARQ process based on the parameter. In some examples, HARQ performing component 720 may perform one or more HARQ processes based on the maximum number.

RTD determining component 725 may determine that a round trip delay associated with the configurable HARQ process between the base station and the user terminal satisfies a threshold, wherein determining the parameter is based on determining that the round trip delay satisfies the threshold. The delay window identifier 730 may determine that a propagation delay window between transmitting the transport block and receiving the positive acknowledgement or the negative acknowledgement satisfies a threshold, and wherein determining the parameter is based on determining that the propagation delay window satisfies the threshold. MCS identifier 735 may perform the configurable HARQ process based on the modulation and coding scheme information associated with the maximum number of HARQ processes.

HARQ identifying component 740 may identify a HARQ identifier and identify at least one of a slot number, time, or subframe count. In some examples, HARQ identifying component 740 may identify a first HARQ process of the number of parallel HARQ processes based on the HARQ identifier and based on at least one of the slot number, the time, or the subframe count, wherein transmitting the message is based on identifying the first HARQ process. In some cases, the HARQ process is disabled based on receiving the message, wherein the message includes the identified HARQ process identifier. In some cases, a first HARQ process of the number of parallel HARQ processes is indexed by a HARQ identifier and by at least one of a slot number, a time, or a subframe count.

Flushing component 745 can flush one or more buffers associated with the configurable HARQ process based on receiving the message, wherein the message includes an indicator to cause the user terminal to flush the one or more buffers associated with the configurable HARQ process. Code block receiver 750 may receive one or more grouped code blocks from a transport block over multiple time slots. HARQ configuring component 755 may configure the number of acknowledgement or negative acknowledgement bits included in a single message associated with the number of parallel HARQ processes. Message transmitter 760 can transmit a single message with the number of acknowledgement or negative acknowledgement bits based on receiving the message.

Fig. 8 illustrates a diagram of a system 800 including a device 805 that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. Device 805 may be an example of or include components of device 505, device 605, or UE 115 as described herein. Device 805 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communications manager 810, an I/O controller 815, a transceiver 820, an antenna 825, a memory 830, and a processor 840. These components may be in electronic communication via one or more buses, such as bus 845.

The communication manager 810 may receive a message from a base station indicating configurable HARQ processes that are configurable on a per-HARQ process basis; determining parameters for the configurable HARQ process based on the message; and performing the configurable HARQ process based on the parameter. The communication manager 810 may also receive, at the user terminal, a message indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal; determining a maximum number of parallel HARQ processes supported between the base station and the user terminal according to the message; and performing one or more HARQ processes based on the maximum number.

I/O controller 815 may manage input and output signals of device 805. I/O controller 815 may also manage peripheral devices that are not integrated into device 805. In some cases, I/O controller 815 may represent a physical connection or port to an external peripheral device. In some cases, I/O controller 815 may utilize an operating system, such as Or another known operating system. In other cases, I/O controller 815 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I/O controller 815 may be implemented as part of a processor. In some cases, a user may interact with device 805 via I/O controller 815 or via a hardware component controlled by I/O controller 815.

The transceiver 820 may communicate bi-directionally via one or more antennas, wired or wireless links, as described above. For example, transceiver 820 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 820 may also include a modem to modulate packets and provide the modulated packets to the antennas for transmission, as well as demodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 825. However, in some cases, the device may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

Memory 830 may include RAM and ROM. The memory 830 may store computer-readable, computer-executable code 835 comprising instructions that, when executed, cause the processor to perform various functions described herein. In some cases, memory 830 may contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

Processor 840 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combinations thereof). In some cases, processor 840 may be configured to operate a memory array using a memory controller. In other cases, the memory controller can be integrated into processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks to support a dynamically configurable acknowledgement procedure).

Code 835 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communications. Code 835 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, code 835 may not be directly executable by processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

Fig. 9 illustrates a block diagram 900 of a device 905 that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The device 905 may be an example of aspects of a base station 105 as described herein. The device 905 may include a receiver 910, a communication manager 915, and a transmitter 920. The device 905 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

Receiver 910 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to dynamically configurable acknowledgement procedures, etc.). Information may be passed to other components of device 905. The receiver 910 may be an example of aspects of the transceiver 1220 described with reference to fig. 12. Receiver 910 can utilize a single antenna or a set of antennas.

The communications manager 915 may determine parameters for configurable HARQ processes for the user terminal that are configurable on a per-HARQ process basis; and transmitting a message indicating the configurable HARQ process and the parameter to the user terminal. The communication manager 915 may also transmit a message to the user terminal indicating the maximum number of parallel HARQ processes supported between the base station and the user terminal; determining a maximum number of parallel HARQ processes supported between the base station and the user terminal according to the message; and performing one or more HARQ processes according to the maximum number. The communication manager 915 may be an example of aspects of the communication manager 1210 described herein.

The communication manager 915 or subcomponents thereof may be implemented in hardware, in code executed by a processor (e.g., software or firmware), or in any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 915 or subcomponents thereof may be performed by a general purpose processor, a DSP, an Application Specific Integrated Circuit (ASIC), an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

The communication manager 915, or subcomponents thereof, may be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, the communication manager 915 or subcomponents thereof may be separate and distinct components in accordance with various aspects of the present disclosure. In some examples, the communication manager 915 or subcomponents thereof may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof, in accordance with various aspects of the present disclosure.

Transmitter 920 may transmit signals generated by other components of device 905. In some examples, the transmitter 920 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 920 may be an example of aspects of the transceiver 1220 described with reference to fig. 12. Transmitter 920 may utilize a single antenna or a set of antennas.

Fig. 10 illustrates a block diagram 1000 of an apparatus 1005 supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The device 1005 may be an example of aspects of the device 905 or the base station 105 as described herein. The device 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1035. The device 1005 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

Receiver 1010 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to dynamically configurable acknowledgement procedures, etc.). Information may be communicated to other components of the device 1005. The receiver 1010 may be an example of aspects of the transceiver 1220 described with reference to fig. 12. Receiver 1010 may utilize a single antenna or a set of antennas.

The communication manager 1015 may be an example of aspects of the communication manager 915 as described herein. Communication manager 1015 may include a parameter determining component 1020, a message transmitter 1025, and a HARQ performing component 1030. The communication manager 1015 may be an example of aspects of the communication manager 1210 described herein.

Parameter determining component 1020 may determine parameters for a configurable HARQ process for a user terminal that is configurable on a per-HARQ process basis.

Message transmitter 1025 may transmit a message to the user terminal indicating the configurable HARQ process and the parameter.

Message transmitter 1025 may transmit a message to the user terminal indicating the maximum number of parallel HARQ processes supported between the base station and the user terminal.

Parameter determining component 1020 may determine a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message.

HARQ performing component 1030 may perform one or more HARQ processes according to the maximum number.

A transmitter 1035 may transmit signals generated by other components of the device 1005. In some examples, the transmitter 1035 may be co-located with the receiver 1010 in a transceiver module. For example, the transmitter 1035 may be an example of aspects of the transceiver 1220 described with reference to fig. 12. The transmitter 1035 may utilize a single antenna or a set of antennas.

Fig. 11 illustrates a block diagram 1100 of a communication manager 1105 supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The communication manager 1105 may be an example of aspects of the communication manager 915, the communication manager 1015, or the communication manager 1210 described herein. The communication manager 1105 may include a parameter determination component 1110, a message transmitter 1115, an RTD determination component 1120, a delay window identifier 1125, a HARQ configuration component 1130, a code block clusterer 1135, a code block transmitter 1140, and a HARQ performing component 1145. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

Parameter determining component 1110 may determine parameters for a configurable HARQ process for a user terminal that is configurable on a per-HARQ process basis.

In some examples, parameter determining component 1110 may determine a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message.

In some examples, parameter determining component 1110 may determine to disable one or more features associated with one or more transport blocks in the HARQ process.

In some examples, the HARQ transmission is determined to span more than one slot, wherein the parameter comprises a size of the HARQ transmission.

In some cases, the message includes an indicator that causes the user terminal to flush one or more buffers associated with the configurable HARQ process.

The message transmitter 1115 may transmit a message indicating the configurable HARQ process and the parameters to the user terminal.

In some examples, the message transmitter 1115 may transmit a message to a user terminal indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal.

HARQ performing component 1145 may perform one or more HARQ processes according to the maximum number.

RTD determining component 1120 may determine that a round trip delay associated with the configurable HARQ process between the base station and the user terminal satisfies a threshold, wherein determining the parameter is based on determining that the round trip delay satisfies the threshold.

Delay window identifier 1125 may determine that a propagation delay window between transmitting a transport block and receiving a positive acknowledgement or a negative acknowledgement satisfies a threshold, and wherein determining the parameter is based on determining that the propagation delay window satisfies the threshold.

The HARQ configuring component 1130 may complete disabling HARQ processes on a per cell basis.

In some cases, the message includes a HARQ acknowledgment configured to cause the user terminal to flush a buffer associated with a configurable acknowledgment process.

Code block grouper 1135 may group code blocks from multiple transport blocks.

The code block transmitter 1140 may transmit the grouped code blocks over multiple time slots.

Fig. 12 shows a diagram of a system 1200 including a device 1205 that supports a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. Device 1205 may be an example of, or include a component of, device 905, device 1005, or base station 105 as described herein. The device 1205 may include components for two-way voice and data communications including components for transmitting and receiving communications including a communication manager 1210, a network communication manager 1215, a transceiver 1220, an antenna 1225, a memory 1230, a processor 1240, and an inter-station communication manager 1245. These components may be in electronic communication via one or more buses, such as bus 1250.

The communication manager 1210 may determine parameters for a configurable HARQ process for a user terminal that is configurable on a per HARQ process basis; and transmitting a message indicating the configurable HARQ process and the parameter to the user terminal. The communication manager 1210 may also transmit a message to the user terminal indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal; determining a maximum number of parallel HARQ processes supported between the base station and the user terminal according to the message; and performing one or more HARQ processes according to the maximum number.

The network communications manager 1215 may manage communications with the core network (e.g., via one or more wired backhaul links). For example, the network communications manager 1215 may manage the delivery of data communications for client devices, such as one or more UEs 115.

The transceiver 1220 may communicate bi-directionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1220 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1220 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, as well as to demodulate packets received from the antenna.

In some cases, the wireless device may include a single antenna 1225. However, in some cases, the device may have more than one antenna 1225, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

Memory 1230 may include RAM, ROM, or a combination thereof. The memory 1230 may store computer-readable code 1235 that includes instructions that, when executed by a processor (e.g., the processor 1240), cause the device to perform various functions described herein. In some cases, memory 1230 may contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

Processor 1240 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combinations thereof). In some cases, processor 1240 may be configured to operate a memory array using a memory controller. In some cases, a memory controller may be integrated into processor 1240. The processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1230) to cause the apparatus 1205 to perform various functions (e.g., functions or tasks to support a dynamically configurable acknowledgement procedure).

The inter-station communication manager 1245 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communication manager 1245 may coordinate scheduling of transmissions to the UEs 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-station communication manager 1245 may provide an X2 interface within LTE/LTE-a wireless communication network technology to provide communication between base stations 105.

Code 1235 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communications. Code 1235 may be stored in a non-transitory computer-readable medium, such as system memory or other type of memory. In some cases, the code 1235 may not be directly executable by the processor 1240 but may cause the computer (e.g., when compiled and executed) to perform the functions described herein.

Fig. 13 shows a flow diagram illustrating a method 1600 of supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The operations of method 1600 may be implemented by UE 115 or components thereof as described herein. For example, the operations of method 1600 may be performed by a communication manager as described with reference to fig. 5-8. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

At 1605, the UE may receive a message from the base station indicating configurable HARQ processes that are configurable on a per-HARQ process basis. 1605 may be performed in accordance with the methods described herein. In some examples, aspects of the operation of 1605 may be performed by the message receiver as described with reference to fig. 5-8.

At 1610, the UE may determine parameters for the configurable HARQ process based on the message. 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed by a parameter determination component as described with reference to fig. 5-8.

At 1615, the UE may perform the configurable HARQ process based on the parameter. 1615 may be performed according to the methods described herein. In some examples, aspects of the operation of 1615 may be performed by a HARQ performing component as described with reference to fig. 5-8.

Fig. 14 shows a flow diagram illustrating a method 1400 of supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The operations of method 1400 may be implemented by UE 115 or components thereof as described herein. For example, the operations of method 1400 may be performed by a communication manager as described with reference to fig. 5-8. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

At 1405, the UE may receive a message from a base station indicating configurable HARQ processes that are configurable on a per-HARQ process basis. 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed by a message receiver as described with reference to fig. 5-8.

At 1410, the UE may determine parameters for a configurable HARQ process based on the message. 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed by a parameter determination component as described with reference to fig. 5-8.

At 1415, the UE may reduce a maximum number of HARQ retransmissions allowed during the configurable HARQ process based on receiving the message. The operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operation of 1415 may be performed by a parameter determination component as described with reference to fig. 5-8.

At 1420, the UE may perform the configurable HARQ process based on the parameter. 1420 operations may be performed according to the methods described herein. In some examples, aspects of the operations of 1420 may be performed by a HARQ performing component as described with reference to fig. 5-8.

At 1425, the UE may determine to disable one or more features associated with one or more transport blocks in the HARQ process. 1425 may be performed in accordance with the methods described herein. In some examples, aspects of the operation of 1425 may be performed by a parameter determination component as described with reference to fig. 5-8.

At 1430, the UE may flush one or more buffers associated with the configurable HARQ process based on receiving the message, wherein the message includes an indicator to cause the user terminal to flush the one or more buffers associated with the configurable HARQ process. 1430 may be performed according to the methods described herein. In some examples, aspects of the operations of 1430 may be performed by a refresh component as described with reference to fig. 5-8.

Fig. 15 shows a flow diagram illustrating a method 1500 of supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The operations of method 1500 may be implemented by UE 115 or components thereof as described herein. For example, the operations of method 1500 may be performed by a communications manager as described with reference to fig. 5-8. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

At 1505, the UE may receive a message from a base station indicating configurable HARQ processes that are configurable on a per-HARQ process basis. 1505 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1505 may be performed by a message receiver as described with reference to fig. 5-8.

At 1510, the UE may determine parameters for the configurable HARQ process based on the message. 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed by a parameter determination component as described with reference to fig. 5-8.

At 1515, the UE may determine that the HARQ transmission spans more than one slot, wherein the parameter includes a size of the HARQ transmission. 1515 the operations may be performed in accordance with the methods described herein. In some examples, aspects of the operation of 1515 may be performed by a parameter determination component as described with reference to fig. 5-8.

At 1520, the UE may perform the configurable HARQ process based on the parameter. 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed by a HARQ performing component as described with reference to fig. 5-8.

Fig. 16 shows a flow diagram illustrating a method 1600 of supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The operations of method 1600 may be implemented by UE 115 or components thereof as described herein. For example, the operations of method 1600 may be performed by a communication manager as described with reference to fig. 5-8. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

Fig. 17 shows a flow diagram illustrating a method 1700 of supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The operations of method 1700 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of method 1700 may be performed by a communication manager as described with reference to fig. 5-8. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

At 1705, the UE may receive, at a user terminal, a message indicating a maximum number of parallel HARQ processes supported between a base station and the user terminal. 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed by a message receiver as described with reference to fig. 5-8.

At 1710, the UE may determine a maximum number of parallel HARQ processes supported between the base station and the user terminal from the message. The operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed by a parameter determination component as described with reference to fig. 5-8.

At 1715, the UE may perform one or more HARQ processes based on the maximum number. 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be performed by the HARQ performing component as described with reference to fig. 5-8.

Fig. 18 shows a flow diagram illustrating a method 2000 of supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The operations of method 2000 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of method 2000 may be performed by a communication manager as described with reference to fig. 9-12. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

At 2005, the base station may determine parameters for a configurable HARQ process for the user terminal that are configurable on a per-HARQ process basis. 2005 may be performed according to the methods described herein. In some examples, aspects of the operations of 2005 may be performed by a parameter determination component as described with reference to fig. 9-12.

At 2010, the base station may transmit a message to the user terminal indicating the configurable HARQ process and the parameters. The operations of 2010 may be performed according to the methods described herein. In some examples, aspects of the operations of 2010 may be performed by a message transmitter as described with reference to fig. 9-12.

Fig. 19 shows a flow diagram illustrating a method 1900 of supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The operations of method 1900 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of method 1900 may be performed by a communication manager as described with reference to fig. 9-12. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

At 1905, the base station may determine parameters for configurable HARQ processes for the user terminal that are configurable on a per-HARQ process basis. 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of 1905 may be performed by a parameter determination component as described with reference to fig. 9-12.

At 1910, the base station may determine that a round trip delay associated with the configurable HARQ process between the base station and the user terminal satisfies a threshold, wherein determining the parameter is based on determining that the round trip delay satisfies the threshold. 1910 may be performed according to the methods described herein. In some examples, aspects of the operations of 1910 may be performed by an RTD determination component as described with reference to fig. 9-12.

At 1915, the base station may determine that a propagation delay window between transmitting the transport block and receiving the positive acknowledgement or the negative acknowledgement satisfies a threshold, and wherein determining the parameter is based on determining that the propagation delay window satisfies the threshold. 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of 1915 may be performed by a deferral window identifier as described with reference to fig. 9-12.

At 1920, the base station may transmit a message to the user terminal indicating the configurable HARQ process and the parameter. The operations of 1920 may be performed according to the methods described herein. In some examples, aspects of the operations of 1920 may be performed by a message transmitter as described with reference to fig. 9-12.

Fig. 20 shows a flow diagram illustrating a method 2000 of supporting a dynamically configurable acknowledgement procedure in accordance with one or more aspects of the present disclosure. The operations of method 2000 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of method 2000 may be performed by a communication manager as described with reference to fig. 9-12. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

At 2005, the base station may transmit a message to a user terminal indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal. 2005 may be performed according to the methods described herein. In some examples, aspects of the operations of 2005 may be performed by a message transmitter as described with reference to fig. 9-12.

At 2010, the base station may determine from the message a maximum number of parallel HARQ processes supported between the base station and the user terminal. The operations of 2010 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 2010 may be performed by a parameter determination component as described with reference to fig. 9-12.

At 2015, the base station can perform one or more HARQ processes according to the maximum number. The operations of 2015 may be performed according to methods described herein. In some examples, aspects of the operations of 2015 may be performed by a HARQ performing component as described with reference to fig. 9-12.

It should be noted that the methods described herein describe possible implementations, and that the operations and procedures may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more methods may be combined.

The following provides an overview of examples of the present disclosure:

example 1: a method for wireless communication at a user terminal, comprising: transmitting a first message to a base station indicating the user terminal's ability to participate in a configurable acknowledgement procedure; receiving a second message from the base station indicating the configurable acknowledgement procedure, wherein the configurable acknowledgement procedure is based at least in part on a capability of the user terminal; determining parameters for the configurable acknowledgement procedure based at least in part on the second message; and performing the configurable acknowledgement process based at least in part on the parameter.

Example 2: the method of example 1, further comprising: identifying a wireless communication link for communicating a second message associated with the configurable acknowledgement process is part of a non-terrestrial network, wherein determining the parameter is based at least in part on identifying that the wireless communication link is part of a non-terrestrial network.

Example 3: the method of example 1 or 2, further comprising: determining that a round trip delay between the base station and the user terminal associated with the configurable acknowledgement process satisfies a threshold, wherein determining the parameter is based at least in part on determining that the round trip delay satisfies the threshold.

Example 4: the method of examples 1 to 3, further comprising: identifying that a propagation delay window between transmitting the message and receiving an acknowledgement or negative acknowledgement satisfies a threshold, wherein determining the parameter is based at least in part on determining that the propagation delay window satisfies the threshold.

Example 5: the method of examples 1 to 4, wherein determining the parameter further comprises: reducing a maximum number of HARQ retransmissions allowed during the configurable acknowledgement process based at least in part on receiving the second message.

Example 6: the method of example 5, wherein the parameter comprises a maximum number of HARQ retransmissions.

Example 7: the method of example 5 or 6, further comprising: identifying modulation and coding scheme information associated with the maximum number of HARQ retransmissions, wherein performing the configurable acknowledgement process is based at least in part on identifying the modulation and coding scheme information.

Example 8: the method of examples 1 to 4, wherein determining the parameter further comprises: determining to disable HARQ retransmissions associated with one or more messages.

Example 9: the method of example 8, wherein the parameter indicates that the maximum number of HARQ retransmissions is equal to zero.

Example 10: the method of example 8 or 9, wherein the second message includes Radio Resource Control (RRC) signaling configured to disable HARQ retransmissions.

Example 11: the method of example 8 or 9, wherein the second message includes downlink control information configured to disable HARQ retransmission.

Example 12: the method of example 8 or 9, wherein the second message includes a system information block.

Example 13: the method of examples 8 to 12, further comprising: identifying a HARQ identifier indicating that the HARQ retransmission is disabled based at least in part on receiving a second message, wherein the second message includes the identified HARQ identifier.

Example 14: the method of examples 8 to 13, further comprising: refreshing one or more buffers associated with the configurable acknowledgement procedure based at least in part on receiving a second message, wherein the second message includes an indicator to cause the user terminal to refresh the one or more buffers associated with the configurable acknowledgement procedure.

Example 15: the method of example 14, wherein the indicator comprises a New Data Indicator (NDI), a Code Block Group Transmission Information (CBGTI) indicator, a code block group clear information (CBGFI) indicator, or a combination thereof.

Example 16: the method of example 8 or 9, wherein the second message comprises a HARQ acknowledgement configured to cause the user terminal to flush a buffer associated with a configurable acknowledgement process.

Example 17: the method of examples 1 to 16, wherein determining the parameter further comprises: the number of parallel HARQ processes between the base station and the user terminal is determined.

Example 18: the method of example 17, wherein the number of parallel HARQ processes is greater than sixteen HARQ processes.

Example 19: the method of example 17 or 18, wherein: the first message indicates a number of buffers the user terminal may configure to use for parallel HARQ processes; and the number of parallel HARQ processes is based at least in part on the number of buffers.

Example 20: the method of examples 17 to 19, wherein the second message includes a HARQ identifier having five or more bits.

Example 21: the method of examples 17 to 20, further comprising: identifying a HARQ identifier and identifying at least one of a slot number, a time, or a subframe count; and identifying a first HARQ process of the number of parallel HARQ processes based at least in part on the HARQ identifier and based on at least one of the slot number, the time, or the subframe count, wherein transmitting the second message is based at least in part on identifying the first HARQ process.

Example 22: the method of examples 17 to 21, wherein a first HARQ process of the number of parallel HARQ processes is indexed by a HARQ identifier and by at least one of a slot number, a time, or a subframe count.

Example 23: the method of examples 17 to 22, further comprising: configuring a number of acknowledgement or negative acknowledgement bits included in a single message associated with the number of parallel HARQ processes; and transmitting a single message with the number of acknowledgement or negative acknowledgement bits based at least in part on receiving the second message.

Example 24: the method of examples 1 to 23, wherein determining the parameter further comprises: determining that the HARQ transmission spans more than one slot, wherein the parameter includes a size of the HARQ transmission.

Example 25: the method of example 24, further comprising: determining a size of a transport block associated with the HARQ transmission, wherein determining that the HARQ transmission spans more than one slot is based at least in part on determining the size of the transport block.

Example 26: the method of example 24, further comprising: one or more grouped code blocks from a plurality of transport blocks are received over a plurality of time slots.

Example 27: the method of example 24, the size of the HARQ transmission configured to fill a propagation delay window associated with a round trip delay of the configurable acknowledgement process.

Example 28: a method for wireless communications at a base station, comprising: receiving, from a user terminal, a first message indicating a capability of the user terminal to participate in a configurable acknowledgement procedure; determining parameters for the configurable acknowledgement procedure based at least in part on capabilities of the user terminal; and transmitting a second message to the user terminal indicating the configurable acknowledgement procedure and the parameter.

Example 29: the method of example 28, further comprising: identifying a wireless communication link for communicating a second message associated with the configurable acknowledgement process is part of a non-terrestrial network, wherein determining the parameter is based at least in part on identifying that the wireless communication link is part of a non-terrestrial network.

Example 30: the method of example 28 or 29, further comprising: determining that a round trip delay between the base station and the user terminal associated with the configurable acknowledgement process satisfies a threshold, wherein determining the parameter is based at least in part on determining that the round trip delay satisfies the threshold.

Example 31: the method of examples 28 to 30, further comprising: identifying that a propagation delay window between transmitting the message and receiving an acknowledgement or negative acknowledgement satisfies a threshold, wherein determining the parameter is based at least in part on determining that the propagation delay window satisfies the threshold.

Example 32: the method of examples 28 to 31, wherein determining the parameter further comprises: reducing a maximum number of HARQ retransmissions allowed during the configurable acknowledgement process based at least in part on a capability of the user terminal.

Example 33: the method of example 32, wherein the parameter comprises a maximum number of HARQ retransmissions.

Example 34: the method of example 32, further comprising: identifying modulation and coding scheme information associated with the maximum number of HARQ retransmissions, wherein transmitting the second message is based at least in part on identifying the modulation and coding scheme information.

Example 35: the method of examples 28 to 31, wherein determining the parameter further comprises: determining to disable HARQ retransmissions associated with one or more messages.

Example 36: the method of example 35, wherein the parameter indicates that a maximum number of HARQ retransmissions is equal to zero.

Example 37: the method of example 35, wherein: disabling HARQ retransmissions is done on a per user terminal basis.

Example 38: the method of examples 35 to 37, wherein the second message comprises Radio Resource Control (RRC) signaling configured to disable HARQ retransmissions.

Example 39: the method of examples 35 to 37, wherein the second message comprises downlink control information configured to disable HARQ retransmissions.

Example 40: the method of example 35, wherein: disabling HARQ retransmissions is done on a per cell basis.

Example 41: the method of examples 35 to 38, wherein the second message comprises a system information block.

Example 42: the method of examples 35 to 41, further comprising: identifying a HARQ identifier indicating that the HARQ retransmission is disabled, wherein the second message includes the identified HARQ identifier.

Example 43: the method of examples 35 to 37, wherein the second message comprises an indicator to cause the user terminal to refresh one or more buffers associated with the configurable acknowledgement procedure.

Example 44: the method of example 43, wherein the indicator comprises a New Data Indicator (NDI), a Code Block Group Transmission Information (CBGTI) indicator, a code block group clear information (CBGFI) indicator, or a combination thereof.

Example 45: the method of examples 35 to 37, wherein the second message comprises a HARQ acknowledgement configured to cause the user terminal to flush a buffer associated with a configurable acknowledgement process.

Example 46: the method of examples 28 to 31, wherein determining the parameter further comprises: the number of parallel HARQ processes between the base station and the user terminal is determined.

Example 47: the method of example 46, wherein the number of parallel HARQ processes is greater than sixteen HARQ processes.

Example 48: the method of example 46 or 47, wherein: the first message indicates a number of buffers the user terminal may configure to use for parallel HARQ processes; and the number of parallel HARQ processes is based at least in part on the number of buffers.

Example 49: the method of examples 46 to 48, wherein the second message comprises a HARQ identifier having five or more bits.

Example 50: the method of examples 46 to 49, further comprising: identifying a HARQ identifier and identifying at least one of a slot number, a time, or a subframe count; and identifying a first HARQ process of the number of parallel HARQ processes based at least in part on the HARQ identifier and based on at least one of the slot number, the time, or the subframe count, wherein transmitting the second message is based at least in part on identifying the first HARQ process.

Example 51: the method of examples 46 to 50, wherein a first HARQ process of the number of parallel HARQ processes is indexed by a HARQ identifier and by at least one of a slot number, a time, or a subframe count.

Example 52: the method of examples 46 to 51, further comprising: configuring a number of acknowledgement or negative acknowledgement bits included in a single message associated with the number of parallel HARQ processes; and receiving a single message with the number of acknowledgement or negative acknowledgement bits based at least in part on transmitting the second message.

Example 53: the method of examples 28 to 31, wherein determining the parameter further comprises: determining that the HARQ transmission spans more than one slot, wherein the parameter includes a size of the HARQ transmission.

Example 54: the method of example 53, further comprising: determining a size of a transport block associated with the HARQ transmission, wherein determining that the HARQ transmission spans more than one slot is based at least in part on determining the size of the transport block.

Example 55: the method of example 53 or 54, further comprising: grouping code blocks from a plurality of transport blocks; and transmitting the warp encoded block over a plurality of time slots.

Example 56: the method of examples 53 to 55, further comprising: the size of the HARQ transmission is enlarged to fill a propagation delay window associated with a round trip delay of the configurable acknowledgement process.

Example 57: an apparatus for wireless communication, comprising a processor; and a memory coupled to the processor, the processor and memory configured to perform the method of any of examples 1 to 27.

Example 58: an apparatus for wireless communication, comprising a processor; and a memory coupled to the processor, the processor and the memory configured to perform the method of any of examples 28-56.

Example 59: an apparatus, comprising: at least one apparatus for performing the method of any of examples 1-27.

Example 60: an apparatus, comprising: at least one apparatus for performing the method of any of examples 28-56.

Example 61: a non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform a method as in any of examples 1-27.

Example 62: a non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform a method as in any of examples 28-56.

Example 63: a method for wireless communication at a user terminal, comprising: receiving a message from a base station indicating configurable HARQ processes that are configurable on a per HARQ process basis; determining parameters for the configurable HARQ process based at least in part on the message; and performing the configurable HARQ process based at least in part on the parameter.

Example 64: the method of example 63, wherein the message is received via a communication link in a non-terrestrial network, and wherein determining the parameter is based at least in part on the wireless communication link being part of the non-terrestrial network.

Example 65: the method of example 63 or 64, further comprising: determining that a round trip delay associated with the configurable HARQ process between the base station and the user terminal satisfies a threshold, wherein determining the parameter is based at least in part on determining that the round trip delay satisfies the threshold.

Example 66: the method of examples 63 to 65, further comprising: determining that a propagation delay window between transmitting a transport block and receiving a positive acknowledgement or a negative acknowledgement satisfies a threshold, and wherein determining the parameter is based at least in part on determining that the propagation delay window satisfies the threshold.

Example 67: the method of examples 63-66, wherein determining the parameter further comprises: reducing a maximum number of HARQ retransmissions allowed during the configurable HARQ process based at least in part on receiving the message.

Example 68: the method of example 67, wherein the parameter indicates whether HARQ combining is used to perform the configurable HARQ process.

Example 69: the method of examples 63-68, wherein performing the configurable HARQ process is based at least in part on modulation and coding scheme information associated with a maximum number of HARQ processes.

Example 70: the method of examples 63-69, wherein determining the parameter further comprises: determining to disable one or more features associated with one or more transport blocks in the HARQ process.

Example 71: the method of example 70, wherein the parameter indicates that a positive acknowledgement or a negative acknowledgement is to follow the data transmission.

Example 72: the method of example 70, wherein the message is received via Radio Resource Control (RRC) signaling or in a System Information Block (SIB).

Example 73: the method of examples 63 through 72, wherein the HARQ process is disabled based at least in part on receiving the message, wherein the message includes the identified HARQ process identifier.

Example 74: the method of examples 63 to 73, further comprising: flushing one or more buffers associated with the configurable HARQ process based at least in part on receiving the message, wherein the message includes an indicator to cause the user terminal to flush the one or more buffers associated with the configurable HARQ process.

Example 75: the method of examples 63-75, wherein determining the parameter further comprises: determining that the HARQ transmission spans more than one slot, wherein the parameter includes a size of the HARQ transmission.

Example 76: the method of example 75, further comprising: one or more grouped code blocks from a transport block are received over a plurality of time slots.

Example 77: a method for wireless communication at a user terminal, comprising: receiving, at a user terminal, a message indicating a maximum number of parallel HARQ processes supported between a base station and the user terminal; determining the maximum number of parallel HARQ processes supported between the base station and the user terminal according to the message; and performing one or more HARQ processes based at least in part on the maximum number.

Example 78: the method of example 77, wherein the message is received in a system information block or via radio resource control signaling.

Example 79: the method of example 77 or 78, wherein the maximum number of parallel HARQ processes is based at least in part on a number of buffers the user terminal may be configured to use for parallel HARQ processes.

Example 80: the method of examples 77 to 79, further comprising: identifying a HARQ identifier and identifying at least one of a slot number, a time, or a subframe count; and identifying a first HARQ process of the number of parallel HARQ processes based at least in part on the HARQ identifier and based on at least one of the slot number, the time, or the subframe count, wherein transmitting the message is based at least in part on identifying the first HARQ process.

Example 81: the method of examples 77-80, wherein a first HARQ process of the number of parallel HARQ processes is indexed by a HARQ identifier and by at least one of a slot number, a time, or a subframe count.

Example 82: the method of examples 77 to 81, further comprising: configuring a number of acknowledgement or negative acknowledgement bits included in a single message associated with the number of parallel HARQ processes; and transmitting a single message with the number of acknowledgement or negative acknowledgement bits based at least in part on receiving the message.

Example 83: a method for wireless communications at a base station, comprising: determining parameters for a configurable HARQ process for a user terminal that are configurable on a per HARQ process basis; and transmitting a message indicating the configurable HARQ process and the parameter to the user terminal.

Example 84: the method of example 83, wherein the message is received via a communication link in a non-terrestrial network, and wherein determining the parameter is based at least in part on the wireless communication link being part of the non-terrestrial network.

Example 85: the method of example 83 or 84, further comprising: determining that a round trip delay associated with the configurable HARQ process between the base station and the user terminal satisfies a threshold, wherein determining the parameter is based at least in part on determining that the round trip delay satisfies the threshold.

Example 86: the method of examples 83 to 85, further comprising: determining that a propagation delay window between transmitting a transport block and receiving a positive acknowledgement or a negative acknowledgement satisfies a threshold, and wherein determining the parameter is based at least in part on determining that the propagation delay window satisfies the threshold.

Example 87: the method of examples 83-86, wherein determining the parameter further comprises: determining to disable one or more features associated with one or more transport blocks in the HARQ process.

Example 88: the method of examples 83-87, wherein determining the parameter further comprises: determining that the HARQ transmission spans more than one slot, wherein the parameter includes a size of the HARQ transmission.

Example 89: a method for wireless communications at a base station, comprising: transmitting a message indicating a maximum number of parallel HARQ processes supported between the base station and the user terminal to the user terminal; determining the maximum number of parallel HARQ processes supported between the base station and the user terminal according to the message; and performing one or more HARQ processes according to the maximum number.

Example 90: the method of example 89, wherein the maximum number of parallel HARQ processes is based at least in part on a number of buffers the user terminal may be configured to use for parallel HARQ processes.

Example 91: the method of example 89 or 90, further comprising: identifying a HARQ identifier and identifying at least one of a slot number, a time, or a subframe count; and identifying a first HARQ process of the number of parallel HARQ processes based at least in part on the HARQ identifier and based on at least one of the slot number, the time, or the subframe count, wherein transmitting the message is based at least in part on identifying the first HARQ process.

The techniques described herein may be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, Single-Carrier frequency division multiple Access (SC-FDMA), and other systems. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. The IS-2000 version may be generally referred to as CDMA 20001X, 1X, etc. IS-856(TIA-856) IS commonly referred to as CDMA 20001 xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes wideband CDMA (wcdma) and other variants of CDMA. TDMA systems may implement radio technologies such as global system for mobile communications (GSM).

The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE)802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE, LTE-A and LTE-A Pro are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, LTE-A Pro, NR, and GSM are described in literature from an organization named "third Generation partnership project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the systems and radio technologies mentioned herein and for other systems and radio technologies. Although aspects of the LTE, LTE-A, LTE-A Pro or NR system may be described for exemplary purposes and LTE, LTE-A, LTE-A Pro or NR terminology may be used in much of the description, the techniques described herein may also be applied to applications other than LTE, LTE-A, LTE-A Pro or NR applications.

A macrocell typically covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by user terminals with service subscriptions with network providers. A small cell may be associated with a lower power base station (as compared to a macro cell), and the small cell may operate in the same or a different (e.g., licensed, unlicensed, etc.) frequency band than the macro cell. According to various examples, a small cell may include a picocell, a femtocell, and a microcell. Picocells, for example, may cover a small geographic area and may allow unrestricted access by user terminals with service subscriptions with the network provider. A femtocell may also cover a smaller geographic area (e.g., a residence) and may provide restricted access by user terminals associated with the femtocell (e.g., user terminals in a Closed Subscriber Group (CSG), user terminals of users in the residence, etc.). The eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, pico eNB, femto eNB, or home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells and may also support communication using one or more component carriers.

The wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, each base station may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, each base station may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operations.

Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative operations and modules described in connection with the disclosure herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and the following claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hard-wired, or any combination thereof. Features that implement functions may also be physically located at various locations, including being distributed such that portions of functions are implemented at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media, including any medium that facilitates transfer of a computer program from one place to another. Non-transitory storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can comprise RAM, ROM, electrically erasable programmable ROM (eeprom), flash memory, Compact Disc (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk (disk) and disc (disc), as used herein, includes CD, laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

As used herein, including in the claims, "or" as used in a list of items (e.g., a list of items accompanied by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such that, for example, a list of at least one of A, B or C means a or B or C or AB or AC or BC or ABC (i.e., a and B and C). Also, as used herein, the phrase "based on" should not be read as referring to a closed condition set. For example, an exemplary procedure described as "based on condition a" may be based on both condition a and condition B without departing from the scope of the present disclosure. In other words, the phrase "based on," as used herein, should be interpreted in the same manner as the phrase "based, at least in part, on.

In the drawings, similar components or features may have the same reference numerals. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description may apply to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.

The illustrations set forth herein in connection with the figures describe example configurations and are not intended to represent all examples that may be implemented or fall within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration," and does not mean "preferred" or "advantageous over other examples. The detailed description includes specific details to provide an understanding of the described technology. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The description herein is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

67页详细技术资料下载

上一篇：一种医用注射器针头装配设备

下一篇：用于对反馈码本进行复用的编码和资源映射

Dynamically configurable acknowledgement procedure

相关技术

网友询问留言