阅读说明：本技术 适配自主上行链路通信设计 (Adapting autonomous uplink communication design ) 是由 张晓霞 K·巴塔德 J·孙 田庆江 S·耶拉玛利 T·卡多斯 Y·魏 A·达蒙佳诺维克 于 2019-01-08 设计创作，主要内容包括：提供了与执行适配自主上行链路(UL)通信有关的无线通信系统和方法。第一无线通信设备从第二无线通信设备接收自主上行链路传输配置。该第一无线通信设备基于该自主上行链路传输配置响应于链路适配参数来确定传输参数。该第一无线通信设备基于所确定的传输参数向该第二无线通信设备传送自主上行链路通信信号。(Wireless communication systems and methods related to performing adaptive autonomous Uplink (UL) communication are provided. The first wireless communication device receives an autonomous uplink transmission configuration from the second wireless communication device. The first wireless communication device determines a transmission parameter in response to a link adaptation parameter based on the autonomous uplink transmission configuration. The first wireless communication device transmits an autonomous uplink communication signal to the second wireless communication device based on the determined transmission parameter.)

1. A method for wireless communication, comprising:

receiving, by a first wireless communication device, an autonomous uplink transmission configuration from a second wireless communication device;

determining, by the first wireless communication device, a transmission parameter in response to a link adaptation parameter based on the autonomous uplink transmission configuration; and

transmitting, by the first wireless communication device, an autonomous uplink communication signal to the second wireless communication device based on the determined transmission parameter.

2. The method of claim 1, wherein the autonomous uplink transmission configuration comprises at least one of a Modulation Coding Scheme (MCS), a Rank Indicator (RI), a Precoding Matrix Indicator (PMI), a waveform type, a resource allocation, or a transmission start time, and wherein the determining comprises:

selecting the transmission parameter from the autonomous uplink transmission configuration.

3. The method of claim 1, further comprising:

receiving, by the first wireless communication device from the second wireless communication device, channel parameters associated with the link adaptation parameters, the channel parameters comprising at least one of noise information, interference information, or acknowledgement/negative acknowledgement (ACK/NACK) feedback information,

wherein the determination is further based on the received channel parameters.

4. The method of claim 1, further comprising:

receiving, by the first wireless communication device, one or more downlink measurement signals from the second wireless communication device,

wherein the determining the transmission parameter comprises:

determining, by the first wireless communication device, at least one of a Modulation Coding Scheme (MCS), a Precoding Matrix Indicator (PMI), or a Rank Indicator (RI) based on the one or more received downlink measurement signals associated with the link adaptation parameters.

5. The method of claim 4, wherein the one or more downlink measurement signals comprise at least one of a reference signal or a synchronization signal, or a broadcast system information signal.

6. The method of claim 4, further comprising:

determining, by the first wireless communication device, at least one of a pathloss or a channel estimate based on the one or more received downlink measurement signals,

wherein the determining the transmission parameter is further based on the at least one of the pathloss or the channel estimate associated with the link adaptation parameter.

7. The method of claim 1, further comprising:

transmitting, by the first wireless communication device, one or more communication signals to the second wireless communication device;

receiving, by the first wireless communication device, one or more feedbacks corresponding to the one or more communication signals from the second wireless communication device; and

determining, by the first wireless communication device, a feedback metric based on at least one of a number of Acknowledgements (ACKs) or a number of Negative Acknowledgements (NACKs) in the one or more feedbacks corresponding to the one or more communication signals,

wherein the determining the transmission parameter is further based on the feedback metric associated with the link adaptation parameter.

8. The method of claim 1, wherein the link adaptation parameter comprises at least one of a time-frequency resource metric and a transmission power metric, and wherein the determining is further based on at least one of:

a transmission buffer status of the first wireless communication device associated with the time-frequency resource metric; or

A power headroom parameter of the first wireless communication device associated with the transmission power metric.

9. The method of claim 1, wherein the first and second light sources are selected from the group consisting of a red light source, a green light source, and a blue light source,

wherein the autonomous uplink transmission configuration further comprises at least one of a plurality of allowable starting transmission symbols or a plurality of allowable ending transmission symbols over a time period,

wherein the method further comprises:

performing Listen Before Talk (LBT) by the first wireless communication device in a spectrum shared by a plurality of network operating entities, an

Wherein the determining comprises:

selecting, by the first wireless communication device, a start time for transmitting the autonomous uplink communication signal based on the LBT and the at least one of the plurality of allowable start transmission symbols or the plurality of allowable end transmission symbols.

10. The method of claim 1, further comprising:

transmitting, by the first wireless communication device to the second wireless communication device, uplink control information comprising information associated with the determined transmission parameter.

11. The method of claim 1, further comprising:

determining, by the first wireless communication device, a demodulation reference Signal (DMRS) configuration comprising at least one of a time-frequency resource, a DMRS sequence parameter, or a DMRS port parameter based on the determined transmission parameter,

wherein the transmitting comprises:

transmitting, by the first wireless communication device, a DMRS to the second wireless communication device based on the determined DMRS configuration.

12. The method of claim 1, further comprising:

receiving, by the first wireless communication device from the second wireless communication device, an updated autonomous uplink transmission configuration in at least one of a Radio Resource Control (RRC) message, Downlink Control Information (DCI), or feedback associated with the autonomous uplink communication signal; and

after transmitting the autonomous uplink communication signal, transmitting, by the first wireless communication device, another autonomous uplink communication signal to the second wireless communication device based on the updated autonomous uplink transmission configuration.

13. The method of claim 12, wherein receiving the updated autonomous uplink transmission configuration comprises:

receiving, by the first wireless communication device, the DCI from the second wireless communication device, the DCI comprising at least one of the updated autonomous uplink transmission configuration and feedback associated with the autonomous uplink communication signal, a scheduling grant for a scheduled uplink transmission, or autonomous uplink transmission activation/deactivation.

14. A method for wireless communication, comprising:

transmitting, by a first wireless communication device, an autonomous uplink transmission configuration; and

receiving, by the first wireless communication device, an autonomous uplink communication signal from a second wireless communication device based on a transmission parameter indicated by the autonomous uplink communication signal, the transmission parameter selected from the autonomous uplink transmission configuration based on a link adaptation parameter.

15. The method of claim 14, wherein the autonomous uplink transmission configuration comprises at least one of a Modulation Coding Scheme (MCS), a Rank Indicator (RI), a Precoding Matrix Indicator (PMI), a waveform type, a resource allocation, or a transmission start time.

16. The method of claim 14, wherein the receiving comprises performing blind detection based on the autonomous uplink transmission configuration.

17. The method of claim 14, wherein the autonomous uplink communication signals comprise at least one of uplink control information or a demodulation reference signal (DMRS) based on the transmission parameters.

18. The method of claim 14, further comprising:

transmitting, by the first wireless communication device, an updated autonomous uplink transmission configuration from the second wireless communication device in at least one of a Radio Resource Control (RRC) message, Downlink Control Information (DCI), or feedback associated with the received autonomous uplink communication signal; and

after receiving the autonomous uplink communication signal, receiving, by the first wireless communication device, another autonomous uplink communication signal from the second wireless communication device based on the updated autonomous uplink transmission configuration.

19. An apparatus, comprising:

a transceiver configured to:

receiving an autonomous uplink transmission configuration from a second wireless communication device; and

transmitting an autonomous uplink communication signal to the second wireless communication device based on the transmission parameter; and

a processor configured to determine the transmission parameter in response to a link adaptation parameter based on the autonomous uplink transmission configuration.

20. The apparatus of claim 19, wherein the autonomous uplink transmission configuration comprises at least one of a Modulation Coding Scheme (MCS), a Rank Indicator (RI), a Precoding Matrix Indicator (PMI), a waveform type, a resource allocation, or a transmission start time, and wherein the processor is further configured to:

determining the transmission parameter by selecting the transmission parameter from the autonomous uplink transmission configuration.

21. The apparatus as set forth in claim 19, wherein,

wherein the transceiver is further configured to:

receiving, from the second wireless communication device, channel parameters associated with the link adaptation parameters, the channel parameters comprising at least one of noise information, interference information, or acknowledgement/negative acknowledgement (ACK/NACK) feedback information, and

wherein the processor is further configured to:

determining the transmission parameter further based on the received channel parameter.

22. The apparatus as set forth in claim 19, wherein,

wherein the transceiver is further configured to:

receiving one or more downlink measurement signals comprising at least one of a reference signal, a synchronization signal, or a broadcast system information signal from the second wireless communication device, and

wherein the processor is further configured to:

determining the transmission parameter by determining at least one of a Modulation Coding Scheme (MCS), a Precoding Matrix Indicator (PMI), or a Rank Indicator (RI) based on the one or more received downlink measurement signals associated with the link adaptation parameter.

23. The apparatus as set forth in claim 19, wherein,

wherein the transceiver is further configured to:

transmitting one or more communication signals to the second wireless communication device; and

receiving one or more feedbacks corresponding to the one or more communication signals from the second wireless communication device, an

Wherein the processor is further configured to:

determining a feedback metric based on at least one of a number of Acknowledgements (ACKs) or a number of Negative Acknowledgements (NACKs) in the one or more feedbacks corresponding to the one or more communication signals; and

determining the transmission parameter further based on the feedback metric associated with the link adaptation parameter.

24. The apparatus of claim 19, wherein the link adaptation parameter comprises at least one of a time-frequency resource metric and a transmission power metric, and wherein the processor is further configured to:

determining the transmission parameter further based on at least one of a transmission buffer status of the apparatus associated with the time-frequency resource metric or a power headroom parameter of the apparatus associated with the transmission power metric.

25. The apparatus of claim 19, wherein the processor is further configured to:

performing Listen Before Talk (LBT) in a spectrum shared by a plurality of network operating entities; and

determining the transmission parameter further based on a result of the LBT.

26. The apparatus of claim 19, wherein the transceiver is further configured to:

transmitting uplink control information including information associated with the determined transmission parameter to the second wireless communication device.

27. An apparatus, comprising:

a transceiver configured to:

transmitting an autonomous uplink transmission configuration; and

receiving the autonomous uplink communication signal from a second wireless communication device based on a transmission parameter indicated by the autonomous uplink communication signal, the transmission parameter selected from the autonomous uplink transmission configuration based on a link adaptation parameter.

28. The apparatus of claim 27, wherein the autonomous uplink transmission configuration comprises at least one of a Modulation Coding Scheme (MCS), a Rank Indicator (RI), a Precoding Matrix Indicator (PMI), a waveform type, a resource allocation, or a transmission start time.

29. The apparatus of claim 27, wherein the transceiver is further configured to:

receiving the transmission parameters by performing blind detection based on the autonomous uplink transmission configuration.

30. The apparatus of claim 27, wherein the autonomous uplink communication signals comprise at least one of uplink control information or reference signals based on the transmission parameters.

Technical Field

The present application relates to wireless communication systems and methods, and more particularly to performing adaptive autonomous Uplink (UL) communication.

Introduction to the design reside in

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). A wireless multiple-access communication system may include several Base Stations (BSs), each supporting communication for multiple communication devices simultaneously, which may otherwise be referred to as User Equipment (UE).

To meet the growing demand for extended mobile broadband connectivity, wireless communication technologies are evolving from LTE technology to the next generation of New Radio (NR) technology. NRs may provision a dynamic medium shared between network operators in a licensed spectrum, a shared spectrum, and/or an unlicensed spectrum. For example, the shared spectrum and/or the unlicensed spectrum may include frequency bands at approximately 3.5 gigahertz (GHz), approximately 6GHz, and approximately 60 GHz.

In a radio access network, such as an NR network, a BS may determine scheduling and allocate resources with respect to communicating with UEs in the network. For example, when the BS has Downlink (DL) data for the UE, the BS may issue a DL grant for the UE and transmit the DL data based on the issued DL grant. When the UE has UL data ready to transmit to the BS, the UE may transmit a Scheduling Request (SR) to the BS. In response, the BS may issue an UL grant for the UE. Subsequently, the UE may transmit UL data to the BS based on the issued UL grant. SR and grant based procedures may result in some transmission delays for UL communications.

When a network operates in a shared medium (e.g., an unlicensed band in the sub-6 GHz band), collisions may occur between nodes sharing the medium. One way to avoid collisions is to perform Listen Before Talk (LBT) or Clear Channel Assessment (CCA) to ensure that the shared channel is clear before accessing the channel. In other words, the BS may schedule or issue transmission grants only after gaining access to the channel. Thus, spectrum sharing may result in additional transmission delays.

One way to reduce the UL transmission delay is to allow the UE to autonomously transmit data to the BS without receiving a UL grant from the BS. For example, multefire (mf), future enhanced licensed assisted access (FeLAA), and NR may support autonomous UL communications. For autonomous UL communication, the BS may provide one or more UEs with a configuration that may be allowed for autonomous UL communication. The autonomous UL communication configuration is relatively static or updated on a relatively slow time scale. However, the quality of the radio link or channel varies over time. Thus, the performance of autonomous UL communication may be limited.

Brief summary of some examples

The following presents a simplified summary of some aspects of the disclosure in order to provide a basic understanding of the discussed technology. This summary is not an extensive overview of all contemplated features of the disclosure, and is intended to neither identify key or critical elements of all aspects of the disclosure, nor delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in a general form as a prelude to the more detailed description that is presented later.

For example, in one aspect of the disclosure, a method of wireless communication includes: receiving, by a first wireless communication device, an autonomous uplink transmission configuration from a second wireless communication device; determining, by the first wireless communication device, a transmission parameter in response to a link adaptation parameter based on the autonomous uplink transmission configuration; and transmitting, by the first wireless communication device, an autonomous uplink communication signal to the second wireless communication device based on the determined transmission parameter.

In an additional aspect of the disclosure, a method of wireless communication includes: transmitting, by a first wireless communication device, an autonomous uplink transmission configuration; and receiving, by the first wireless communication device, the autonomous uplink communication signal from the second wireless communication device based on a transmission parameter indicated by the autonomous uplink communication signal, the transmission parameter selected from the autonomous uplink transmission configuration based on a link adaptation parameter.

In an additional aspect of the disclosure, an apparatus includes a transceiver configured to: receiving an autonomous uplink transmission configuration from a second wireless communication device; and transmitting an autonomous uplink communication signal to the second wireless communication device based on the transmission parameter; and a processor configured to determine the transmission parameter in response to a link adaptation parameter based on the autonomous uplink transmission configuration.

In an additional aspect of the disclosure, an apparatus includes a transceiver configured to: transmitting an autonomous uplink transmission configuration; and receiving the autonomous uplink communication signal from the second wireless communication device based on a transmission parameter indicated by the autonomous uplink communication signal, the transmission parameter selected from the autonomous uplink transmission configuration based on a link adaptation parameter.

Other aspects, features and embodiments of the present invention will become apparent to those ordinarily skilled in the art upon review of the following description of specific exemplary embodiments of the invention in conjunction with the accompanying figures. While features of the invention may be discussed below with respect to certain embodiments and figures, all embodiments of the invention can include one or more of the advantageous features discussed herein. In other words, while one or more embodiments may be discussed as having certain advantageous features, one or more such features may also be used in accordance with the various embodiments of the invention discussed herein. In a similar manner, although example embodiments may be discussed below as device, system, or method embodiments, it should be appreciated that such example embodiments may be implemented in a variety of devices, systems, and methods.