HARQ-ACK feedback method, terminal and base station

文档序号：156011 发布日期：2021-10-26 浏览：22次中文

阅读说明：本技术 一种harq-ack反馈方法、终端及基站 (HARQ-ACK feedback method, terminal and base station ) 是由王俊伟赵锐于 2020-04-23 设计创作，主要内容包括：本发明实施例提供一种HARQ-ACK反馈方法、终端及基站,方法包括：接收基站发送的广播组播调度信令,并确定单播对应的上行资源；当检测到满足预设条件时,将所述广播组播调度信令所对应的第一混合自动重传请求确认回答HARQ-ACK码本复用到所述单播对应的上行资源上,其中所述预设条件为预设窗内同时存在所述广播组播调度信令所指示的HARQ-ACK反馈时隙和所述上行资源所在时隙。本发明实施例简化了广播组播反馈HARQ-ACK的协议设计和复杂度。(The embodiment of the invention provides a HARQ-ACK feedback method, a terminal and a base station, wherein the method comprises the following steps: receiving a broadcast multicast scheduling signaling sent by a base station, and determining uplink resources corresponding to unicast; and when the condition that a preset condition is met is detected, multiplexing a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook corresponding to the broadcast multicast scheduling signaling to an uplink resource corresponding to the unicast, wherein the preset condition is that an HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and a time slot where the uplink resource is located exist in a preset window at the same time. The embodiment of the invention simplifies the protocol design and complexity of the broadcast multicast feedback HARQ-ACK.)

1. A HARQ-ACK feedback method is applied to a terminal and is characterized by comprising the following steps:

receiving a broadcast multicast scheduling signaling sent by a base station, and determining uplink resources corresponding to unicast;

and when the condition that a preset condition is met is detected, multiplexing a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook corresponding to the broadcast multicast scheduling signaling to an uplink resource corresponding to the unicast, wherein the preset condition is that an HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and a time slot where the uplink resource is located exist in a preset window at the same time.

2. The HARQ-ACK feedback method according to claim 1, wherein the determining the uplink resource corresponding to the unicast comprises:

receiving a unicast scheduling signaling sent by a base station, wherein the unicast scheduling signaling carries scheduling information of the uplink resource; alternatively, the first and second electrodes may be,

receiving periodic uplink resource information configured by the base station through a high-level signaling, and determining uplink resources corresponding to the unicast based on the periodic uplink resource information; the periodic uplink resource information comprises a sending period and a time slot offset of an uplink resource;

and the uplink resource is a Physical Uplink Control Channel (PUCCH) resource or a Physical Uplink Shared Channel (PUSCH) resource.

3. The HARQ-ACK feedback method according to claim 2, wherein when the uplink resource is a resource for transmitting unicast HARQ-ACK information scheduled by the unicast scheduling signaling, the preset condition further includes: the receiving time of the unicast scheduling signaling is positioned before the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and at least has X symbols away, and the time slot of the uplink resource meets the receiving processing time of the service data corresponding to the broadcast multicast scheduling signaling; and the X value is the sum of the processing time of the terminal for receiving the unicast scheduling signaling and the multiplexing time of the first HARQ-ACK corresponding to the broadcast multicast scheduling signaling.

4. The HARQ-ACK feedback method according to claim 2,

the first downlink control information DCI corresponding to the broadcast multicast scheduling signaling comprises a request message for indicating whether a terminal waits for carrying information in the unicast scheduling signaling, wherein the carrying information comprises indication information whether a first HARQ-ACK codebook is carried on the uplink resource;

and the second DCI corresponding to the unicast scheduling signaling contains a response message for indicating whether the terminal carries the first HARQ-ACK codebook on the uplink resource.

5. The HARQ-ACK feedback method according to claim 4,

the request message comprises a first indication field and an identification number of the first HARQ-ACK codebook, wherein the first indication field is used for indicating whether a terminal waits for carrying information in the unicast scheduling signaling, a newly added field in the first DCI is added with the request message, or an original field in the first DCI is added with an indication meaning of the request message;

the response message comprises a second indication field and an identification number of the first HARQ-ACK codebook, wherein the second indication field is used for indicating whether the first HARQ-ACK codebook is carried on the uplink resource, the second DCI is provided with a newly added field, the newly added field is added with the response message, or the original field in the second DCI is newly added with an indication meaning of the response message;

and the identification number of each HARQ-ACK codebook and the codebook number of the HARQ-ACK have a corresponding relation.

6. The HARQ-ACK feedback method according to claim 4, wherein the response message comprises a carrying identification bit map of K bits, wherein K represents a maximum number of HARQ-ACK codebooks for broadcast multicast, and represents that the corresponding HARQ-ACK codebook is carried when the number of the bits is a first preset value, and represents that the corresponding HARQ-ACK codebook is not carried when the number of the bits is a second preset value.

7. The HARQ-ACK feedback method according to claim 1, further comprising:

acquiring configuration information of the preset window predefined by a protocol; alternatively, the first and second electrodes may be,

and receiving configuration information of the preset window sent by the base station through a high-level signaling, wherein the configuration information comprises a starting reference position of the preset window, a starting position deviation value and a window length of the preset window.

8. The HARQ-ACK feedback method according to any of claims 1 to 7,

the starting reference position of the preset window is any one of the following:

HARQ-ACK feedback time slot position indicated by the broadcast multicast scheduling signaling;

the time slot of the PUCCH resource indicated by the unicast scheduling signaling is located;

the end time of the physical downlink shared channel PDSCH corresponding to the broadcast multicast scheduling signaling;

the base station configures a time slot where one periodic uplink resource is located;

the receiving time of the broadcast multicast scheduling signaling;

the starting position offset value and/or the window length of the preset window is any one of the following items:

when the starting reference position is the HARQ-ACK feedback time slot position indicated by the broadcast multicast scheduling signaling or the time slot position of the PUCCH resource indicated by the unicast scheduling signaling, the starting position deviation value is a positive value, a negative value or 0;

when the starting reference position is the end time of the PDSCH corresponding to the broadcast multicast scheduling signaling, the starting position deviation value is d, wherein d is greater than or equal to the sum of the processing time of the PDSCH received by the terminal and the multiplexing time of the first HARQ-ACK corresponding to the broadcast multicast scheduling signaling;

when the starting reference position is a time slot in which one of the periodic uplink resources configured by the base station is located, the starting position offset value is a negative value;

and when the initial reference position is the receiving time of the broadcast multicast scheduling signaling, the initial position deviation value is a positive value or 0, and the window length of the preset window is from the initial position to the position of the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling.

9. The HARQ-ACK feedback method according to any of claims 1 to 7, wherein when multiplexing the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling on the uplink resource corresponding to the unicast, an order of the first HARQ-ACK codebook and the second HARQ-ACK codebook existing on the uplink resource is any of the following:

the first HARQ-ACK codebook is located before the second HARQ-ACK codebook;

the first HARQ-ACK codebook is located after the second HARQ-ACK codebook;

sequencing the PUCCH resources corresponding to the first HARQ-ACK codebook before multiplexing and the PUCCH resources corresponding to the second HARQ-ACK codebook;

and sequencing the receiving sequence of the broadcast multicast scheduling signaling and the unicast scheduling signaling.

10. The HARQ-ACK feedback method according to any of claims 1 to 7, wherein when the number of the broadcast multicast scheduling signaling is at least two, and at least two first HARQ-ACK codebooks corresponding to at least two broadcast multicast scheduling signaling are both multiplexed onto the uplink resource, an order of the at least two first HARQ-ACKs on the uplink resource is:

sequencing the first HARQ-ACK feedback time sequence indicated by each broadcast multicast scheduling signaling, wherein when the first HARQ-ACK feedback time indicated by at least two broadcast multicast scheduling signaling is the same, sequencing the first HARQ-ACK feedback time indicated by the at least two broadcast multicast scheduling signaling by increasing the carrier number, and when the first HARQ-ACK feedback time indicated by the at least two broadcast multicast scheduling signaling is the same and the carrier number is the same, sequencing the first HARQ-ACK feedback time indicated by the at least two broadcast multicast scheduling signaling by increasing the carrier number; alternatively, the first and second electrodes may be,

and ordering the indexes of the first HARQ-ACK codebook indicated by each broadcast multicast scheduling signaling into an arrangement order.

11. The HARQ-ACK feedback method according to any of claims 1 to 7, wherein when it is detected that there is no HARQ-ACK feedback slot indicated by the broadcast multicast scheduling signaling and no slot where the uplink resource is located in the preset window, the method further comprises:

not feeding back the HARQ-ACK information indicated by the broadcast multicast scheduling signaling; alternatively, the first and second electrodes may be,

and feeding back HARQ-ACK information on PUCCH resources indicated by the broadcast multicast scheduling signaling.

12. The HARQ-ACK feedback method according to any of claims 1 to 7, wherein when the number of the uplink resources is at least two, the multiplexing the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling onto the uplink resources corresponding to the unicast includes:

multiplexing a first HARQ-ACK codebook on an uplink resource closest to the initial reference position of the preset window; alternatively, the first and second electrodes may be,

multiplexing the first HARQ-ACK codebook on a first uplink resource in the preset window.

13. A HARQ-ACK feedback method is applied to a base station and is characterized by comprising the following steps:

sending a broadcast multicast scheduling signaling to a terminal so that the terminal multiplexes a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook corresponding to the broadcast multicast scheduling signaling to an uplink resource corresponding to a unicast when detecting that a preset condition is met, wherein the preset condition is that a HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and a time slot where the uplink resource is located exist in a preset window at the same time;

and receiving uplink data sent by the terminal through the uplink resource when the preset condition is met, and obtaining a first HARQ-ACK codebook multiplexed on the uplink resource.

14. The HARQ-ACK feedback method according to claim 13, further comprising:

sending a unicast scheduling signaling to the terminal, wherein the unicast scheduling signaling carries scheduling information of the uplink resource; alternatively, the first and second electrodes may be,

configuring periodic uplink resource information to the terminal through a high-level signaling so that the terminal determines uplink resources corresponding to unicast based on the periodic uplink resource information; the periodic uplink resource information comprises a sending period and a time slot offset of an uplink resource;

and the uplink resource is a Physical Uplink Control Channel (PUCCH) resource or a Physical Uplink Shared Channel (PUSCH) resource.

15. The HARQ-ACK feedback method according to claim 14, wherein when the uplink resource is a resource for transmitting unicast HARQ-ACK information scheduled by the unicast scheduling signaling, the preset condition further includes: the receiving time of the unicast scheduling signaling is positioned before the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and at least has X symbols away, and the time slot of the uplink resource meets the receiving processing time of the service data corresponding to the broadcast multicast scheduling signaling; and the X value is the sum of the processing time of the terminal for receiving the unicast scheduling signaling and the multiplexing time of the first HARQ-ACK corresponding to the broadcast multicast scheduling signaling.

16. The HARQ-ACK feedback method according to claim 14,

the first downlink control information DCI corresponding to the broadcast multicast scheduling signaling comprises a request message for indicating whether a terminal waits for carrying information in the unicast scheduling signaling, wherein the carrying information comprises indication information whether the uplink resource carries the first HARQ-ACK codebook;

and the second DCI corresponding to the unicast scheduling signaling contains a response message for indicating whether the terminal carries the first HARQ-ACK codebook on the uplink resource.

17. The HARQ-ACK feedback method according to claim 16,

and the identification number of each HARQ-ACK codebook and the codebook number of the HARQ-ACK have a corresponding relation.

18. The HARQ-ACK feedback method of claim 16, wherein the response message includes a carrying identification bit map with K bits, where K represents a maximum number of HARQ-ACK codebooks for broadcast multicast, and represents that the corresponding HARQ-ACK codebook is carried when a value of the bit is a first preset value, and represents that the corresponding HARQ-ACK codebook is not carried when the value of the bit is a second preset value.

19. The HARQ-ACK feedback method according to claim 13, further comprising:

acquiring configuration information of the preset window predefined by a protocol; alternatively, the first and second electrodes may be,

and sending the configuration information of the preset window to the terminal through a high-level signaling, wherein the configuration information comprises a starting reference position, a starting position deviation value and a window length of the preset window.

20. The HARQ-ACK feedback method according to any of claims 13 to 19, wherein the starting reference position of the preset window is any of the following:

HARQ-ACK feedback time slot position indicated by the broadcast multicast scheduling signaling;

the time slot of the PUCCH resource indicated by the unicast scheduling signaling is located;

the end time of the physical downlink shared channel PDSCH corresponding to the broadcast multicast scheduling signaling;

the base station configures a time slot where one periodic uplink resource is located;

the receiving time of the broadcast multicast scheduling signaling;

the starting position offset value and/or the window length of the preset window is any one of the following items:

when the starting reference position is a time slot in which one of the periodic uplink resources configured by the base station is located, the starting position offset value is a negative value;

21. The HARQ-ACK feedback method according to any of claims 13 to 19, wherein the first HARQ-ACK codebook and the second HARQ-ACK codebook existing on the uplink resource are arranged in any of the following order on the uplink resource:

the first HARQ-ACK codebook is located before the second HARQ-ACK codebook;

the first HARQ-ACK codebook is located after the second HARQ-ACK codebook;

sequencing the PUCCH resources corresponding to the first HARQ-ACK codebook before multiplexing and the PUCCH resources corresponding to the second HARQ-ACK codebook;

and sequencing the receiving sequence of the broadcast multicast scheduling signaling and the unicast scheduling signaling.

22. The HARQ-ACK feedback method according to any of claims 13 to 19, wherein when the number of the broadcast-multicast scheduling signaling is at least two, and at least two first HARQ-ACK codebooks corresponding to at least two broadcast-multicast scheduling signaling are both multiplexed onto the uplink resource, an order of the at least two first HARQ-ACKs on the uplink resource is:

and ordering the indexes of the first HARQ-ACK codebook indicated by each broadcast multicast scheduling signaling into an arrangement order.

23. The HARQ-ACK feedback method according to any of claims 13 to 19, further comprising:

and when the receiving terminal detects that the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and the time slot in which the uplink resource is positioned do not exist simultaneously in a preset window, the receiving terminal feeds back the HARQ-ACK information on the PUCCH resource indicated by the broadcast multicast scheduling signaling.

24. The HARQ-ACK feedback method according to any of claims 13 to 19, wherein when the number of uplink resources is at least two,

multiplexing the first HARQ-ACK codebook on an uplink resource closest to the initial reference position of the preset window; alternatively, the first and second electrodes may be,

multiplexing the first HARQ-ACK codebook on a first uplink resource in the preset window.

25. A HARQ-ACK feedback device applied to a terminal is characterized by comprising:

the receiving module is used for receiving a broadcast multicast scheduling signaling sent by a base station and determining uplink resources corresponding to unicast;

and the multiplexing module is used for multiplexing a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook corresponding to the broadcast multicast scheduling signaling to the uplink resource corresponding to the unicast when a preset condition is detected to be met, wherein the preset condition is that a HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and a time slot where the uplink resource is located exist in a preset window at the same time.

26. An HARQ-ACK feedback device applied to a base station, comprising:

a sending module, configured to send a broadcast multicast scheduling signaling to a terminal, so that when detecting that a preset condition is met, the terminal multiplexes a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook corresponding to the broadcast multicast scheduling signaling to an uplink resource corresponding to a unicast, where the preset condition is that a HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and a time slot where the uplink resource is located exist in a preset window at the same time;

and the receiving module is used for receiving uplink data sent by the terminal through the uplink resource when the preset condition is met, and obtaining a first HARQ-ACK codebook multiplexed on the uplink resource.

27. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of:

receiving a broadcast multicast scheduling signaling sent by a base station, and determining uplink resources corresponding to unicast;

28. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of:

and receiving uplink data sent by the terminal through the uplink resource when the preset condition is met, and obtaining a first HARQ-ACK codebook multiplexed on the uplink resource.

29. A non-transitory computer readable storage medium, having stored thereon a computer program, characterized in that the computer program, when being executed by a processor, is adapted to carry out the steps of the method according to any one of claims 1 to 12 or to carry out the steps of the method according to any one of claims 13 to 24.

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a HARQ-ACK feedback method, a terminal, and a base station.

Background

With The increasing popularity of mobile video services, peer-to-peer multicast/broadcast streaming, group communication, and Internet of Things (IoT) applications, The global mobile communication industry has reached consensus, and a fifth generation mobile communication (5G) network needs to have The capability of flexibly and dynamically allocating wireless spectrum and network resources between unicast services and multicast services, and needs to support independent deployment of a broadcast/multicast network.

In the current 5G, a base station sends two data types, one is terminal-oriented data, which can only be received by a target terminal, and the data becomes unicast data; the other is data for all terminals or specific groups in the cell, that is, all users or specific groups in the cell can receive the service.

In addition, in order to guarantee the communication quality of the data, for transmitting the broadcast multicast service data, the terminal needs to perform Hybrid Automatic Repeat request acknowledgement (HARQ-ACK) feedback, which is feedback information based on the data reception result, and to feed back an ACK (i.e., correct reception acknowledgement) when the data reception is correct and a NACK (i.e., incorrect reception acknowledgement) when the data reception is incorrect. When the base station sends the broadcast multicast data, the group-based scheduling message is sent, and when the terminal needs to feed back the HARQ-ACK, the terminal cannot effectively feed back the HARQ-ACK information due to the terminal-based feedback and the existing air interface scheduling signaling mechanism.

Disclosure of Invention

The embodiment of the invention provides a HARQ-ACK feedback method, a terminal and a base station, which are used for realizing the feedback of the terminal to the HARQ-ACK when the base station schedules broadcast multicast data.

The embodiment of the invention provides a HARQ-ACK feedback method, which is applied to a terminal and comprises the following steps:

receiving a broadcast multicast scheduling signaling sent by a base station, and determining uplink resources corresponding to unicast;

The embodiment of the invention provides a HARQ-ACK feedback method, which is applied to a base station and comprises the following steps:

and receiving uplink data sent by the terminal through the uplink resource when the preset condition is met, and obtaining a first HARQ-ACK codebook multiplexed on the uplink resource.

The embodiment of the invention provides a HARQ-ACK feedback device, which is applied to a terminal and comprises the following steps:

the receiving module is used for receiving a broadcast multicast scheduling signaling sent by a base station and determining uplink resources corresponding to unicast;

The embodiment of the invention provides a HARQ-ACK feedback device, which is applied to a base station and comprises the following components:

The embodiment of the invention provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of the HARQ-ACK feedback method applied to the terminal when executing the program.

The embodiment of the invention provides a base station, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of the HARQ-ACK feedback method applied to the base station when executing the program.

An embodiment of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the HARQ-ACK feedback method.

According to the HARQ-ACK feedback method, the terminal and the base station provided by the embodiment of the invention, after the broadcast multicast scheduling signaling sent by the base station is received, if the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and the time slot of the uplink resource corresponding to the unicast exist in the preset window at the same time, the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling is multiplexed to the uplink resource corresponding to the unicast, so that the protocol design and complexity of the broadcast multicast feedback HARQ-ACK are simplified, and the problem that the PUCCH needs different formats when the terminal is at different positions in a cell is effectively solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a flowchart illustrating the steps of a HARQ-ACK feedback method applied to a terminal according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating the steps of a HARQ-ACK feedback method applied to a base station according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating a first embodiment of the present invention;

FIG. 4 is a diagram illustrating a second embodiment of the present invention;

FIG. 5 is a diagram illustrating a third embodiment of the present invention;

FIG. 6 is a diagram illustrating a fifth embodiment of the present invention;

fig. 7 is a block diagram of an HARQ-ACK feedback apparatus applied to a terminal in an embodiment of the present invention;

fig. 8 is a block diagram of an HARQ-ACK feedback apparatus applied to a base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a terminal in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a base station in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in each embodiment of the present invention, if words such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and actions, those skilled in the art can understand that the words such as "first" and "second" do not limit the quantity and execution order.

The term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "three types" generally indicates that the former and latter associated objects are in an "or" relationship.

The term "plurality" in the embodiments of the present invention means two or more, and other terms are similar thereto.

Furthermore, it should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In a wireless communication environment, since the channel quality is rapidly changed, that is, errors may occur in data transmission, the requirements of different services and different transmission qualities are met in order to improve the reliability of data transmission. The standard employs HARQ processes, a typical HARQ process is described as follows: a transmitting end (base station) transmits a data transmission block (TB 1) to a receiving end (terminal) for the first time, and instructs the terminal to feed back time slot and resource information of a Physical Uplink Control Channel (PUCCH) of HARQ-ACK; the receiving end decodes TB1, the decoding result is an error, and NACK is fed back to the sending end on PUCCH resources of the specified time slot; after receiving the NACK information, the sending end retransmits TB1 and instructs the terminal to feed back PUCCH resource information of HARQ-ACK; the terminal decodes TB1 again (the terminal may merge with the previous data), the decoding result is correct, and ACK is fed back to the data sending terminal; the sending end feeds back ACK to the sending end on the PUCCH resource of the appointed time slot; and the sending end receives the ACK information, and the data sending process is completed. For the unicast HARQ scheduling process, only one receiving terminal is suitable for HARQ-ACK feedback, but for the broadcast multicast service, a group of terminals or all terminals in a cell are used for receiving the service, so the existing unicast HARQ scheduling and feedback indicating mechanism is not suitable for the broadcast multicast feedback based on the honeycomb.

In addition, a Side link (Side link) is based on a terminal-to-terminal communication link, and for the Sidelink broadcast multicast communication, there are two main modes of Sidelink HARQ feedback:

mode one, a feedback method based on HARQ NACK: in this way, all receiving terminals share the same physical side link feedback channel (PSFCH) for feeding back HARQ-ACK. The HARQ NACK information is transmitted on the shared PSFCH resource if any one terminal fails to correctly receive a physical side link shared channel (psch) for transmitting traffic data. For this way, the base station cannot identify which terminal feeds back NACK, and therefore cannot perform adaptive transmission adjustment for the link quality of the terminals that feed back NACK, that is, cannot effectively utilize channel quality information, resulting in waste of wireless air interface resources, and in addition, when the terminal does not detect a broadcast multicast scheduling signaling, the terminal cannot feed back NACK, so that the base station may consider that all terminals correctly receive data, which may result in poor performance of broadcast multicast data transmission.

Mode two, a feedback method based on HARQ ACK/NACK: in the mode, each receiving terminal has independent PSFCH resources, and each receiving terminal sends HARQ ACK/NACK information on the corresponding PSFCH resources according to whether the receiving terminal correctly receives the PSSCH; the main application scenario is when there are fewer terminals in the group. For the method, uplink feedback resources need to be allocated to all terminals, and when the number of terminals receiving the broadcast multicast service is large, it is difficult to allocate uplink channel resources; different receiving ends and base stations have different positions, some of the receiving ends and the base stations need to occupy 2 symbols, some of the receiving ends and the base stations need to occupy 4 symbols, and even some of the receiving ends and the base stations need to occupy 14 symbols in order to effectively feed back the HARQ-ACK, while the resource allocation of the existing scheme is a uniform format and cannot meet the requirement of feeding back the HARQ-ACK of a honeycomb.

Aiming at the HARQ-ACK feedback problem under various situations, the invention provides the following embodiments:

as shown in fig. 1, it is a flowchart of the steps of the HARQ-ACK feedback method applied to a terminal in the embodiment of the present invention, where the method includes the following steps:

step 101: and receiving a broadcast multicast scheduling signaling sent by the base station, and determining uplink resources corresponding to unicast.

Specifically, the terminal receives a broadcast multicast scheduling signaling sent by the base station, and determines an uplink resource corresponding to unicast.

And the uplink resource corresponding to the unicast can be used for feeding back the unicast HARQ-ACK, and the uplink resource comprises PUCCH resource or PUSCH resource.

Step 102: and when the condition that the preset condition is met is detected, multiplexing a first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling to uplink resources corresponding to the unicast.

Specifically, the preset condition is that a HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and a time slot in which the uplink resource is located exist in a preset window at the same time.

Therefore, after the terminal receives the broadcast multicast scheduling signaling sent by the base station, if the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and the time slot of the uplink resource corresponding to the unicast exist in the preset window at the same time, the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling is multiplexed to the uplink resource corresponding to the unicast, the protocol design and complexity of the broadcast multicast feedback HARQ-ACK are simplified, and the problem that the PUCCH needs different formats when the terminal is at different positions in a cell is effectively solved.

Certainly, when detecting that the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and the time slot of the uplink resource corresponding to the unicast scheduling signaling do not exist in the preset window at the same time, the HARQ-ACK information indicated by the broadcast multicast scheduling signaling may not be fed back; or feeding back the HARQ-ACK information on the PUCCH resource indicated by the broadcast multicast scheduling signaling.

In addition, in this embodiment, when determining the uplink resource corresponding to the unicast, the terminal may receive a unicast scheduling signaling sent by the base station, where the unicast scheduling signaling carries scheduling information of the uplink resource; or, receiving periodic uplink resource information configured by the base station through a high-level signaling, and determining uplink resources corresponding to unicast based on the periodic uplink resource information; the periodic uplink resource information comprises a sending period and a time slot offset of an uplink resource, and the uplink resource is a PUCCH resource or a PUSCH resource.

That is, the present embodiment may determine the uplink resource corresponding to the unicast in a unicast scheduling signaling or a higher layer signaling configuration manner.

Specifically, the information elements included in the Downlink Control Information (DCI) in the unicast scheduling signaling are represented as follows: frequency domain resource allocation indication, time domain resource allocation indication, modulation coding format, redundancy coding version, new data indication, HARQ process number, PUCCH resource indication and HARQ feedback time indication. Specifically, the feedback time slot of the HARQ-ACK may be calculated by the "time domain resource allocation indication" and the "HARQ feedback time indication" in the control signaling.

In addition, the periodic uplink resource information configured by the high layer of the base station includes a transmission period and a slot offset of the uplink resource, that is, the following contents are included: PUSCH or PUCCH transmission periods, e.g., { slot1, slot2, slot4, slot 8, slot 16 }; PUSCH or PUCCH slot offset. For example, it is assumed that, by configuration, the transmission cycle of the PUCCH resource or PUSCH resource is 4 slots, and the offset is 0 slots, that is, there is a corresponding PUCCH or PUSCH configuration on uplink slots 0,4,8, and 12 ….

It should be noted that, when the uplink resource is a resource for transmitting unicast HARQ-ACK information scheduled by the unicast scheduling signaling, the preset condition further includes: the receiving time of the unicast scheduling signaling is positioned before the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and at least separated by X symbols, and the time slot of the uplink resource meets the receiving processing time of the service data corresponding to the broadcast multicast scheduling signaling; and the X value is the sum of the processing time of the terminal for receiving the unicast scheduling signaling and the multiplexing time of the first HARQ-ACK corresponding to the broadcast multicast scheduling signaling. This provides conditions for the terminal to multiplex the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling to the uplink resource corresponding to the unicast.

In addition, in this embodiment, the first HARQ-ACK codebook corresponding to the uplink resource multiplexing broadcast multicast scheduling signaling corresponding to unicast may be explicitly indicated. At this time, the first DCI corresponding to the broadcast multicast scheduling signaling includes a request message for indicating whether the terminal waits for the carried information in the unicast scheduling signaling, and the carried information includes indication information whether the uplink resource carries the first HARQ-ACK codebook; the second DCI corresponding to the unicast scheduling signaling contains a response message for indicating whether the terminal carries the first HARQ-ACK codebook on the uplink resource.

Namely, an indication terminal is added in DCI of broadcast multicast scheduling signaling and unicast scheduling signaling to multiplex a first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling to uplink resources of unicast scheduling.

Specifically, the request message includes a first indication field and an identification number of a first HARQ-ACK codebook, where the first indication field is used to indicate whether the terminal waits for carrying information in unicast scheduling signaling, where a new field is added in the first DCI, and the new field is added with the request message or an original field in the first DCI is added with an indication meaning for the request message; the response message comprises a second indication field and an identification number of the first HARQ-ACK codebook, wherein the second indication field is used for indicating whether the first HARQ-ACK codebook is carried on uplink resources, the second DCI is provided with a new field, the new field is added with the response message, or the original field in the second DCI is provided with indication meaning for the response message;

and the identification number of each HARQ-ACK codebook and the codebook number of the HARQ-ACK have a corresponding relation.

Specifically, a first DCI in the broadcast multicast scheduling signaling may newly add a first indication field and an identification number of a first HARQ-CAK codebook, where the first indication field may be 1bit, and at this time, when the bit is 0, the terminal is indicated to wait for carrying information in the unicast scheduling signaling, and when the bit is 1, the terminal is indicated not to wait for carrying information in the unicast scheduling signaling. Specifically, the broadcast multicast scheduling signaling carrying the request message may be referred to as specific broadcast multicast scheduling signaling.

In addition, the request message can be carried in the first DCI by adding an indication meaning to the request message to the original field in the first DCI. For example, 2 bits of "PUCCH power control command" is used to indicate the identification number of the first HARQ-ACK codebook, and the PUCCH power control command is invalid in broadcast multicast and can be used as a reserved bit; the number of bits used in the modulation coding format-5 bits is reduced by 1bit, that is, the modulation coding format is changed into 4 bits, the saved 1bit is used for indicating whether the terminal waits for the carried information in the unicast scheduling signaling, and the reason that the 5 bits can be saved to 4 bits is that the performance requirements of most terminals need to be met based on the condition of broadcast multicast scheduling, so the code rate and the modulation order are not too high.

In addition, the second DCI in the unicast scheduling signaling may be added with a second indication field and an identification number of the first HARQ-CAK codebook. The second indication field may be 1bit, and when the bit is 0, the first HARQ-ACK codebook is indicated to be carried on the uplink resource, and when the bit is 1, the first HARQ-ACK codebook is not indicated to be carried on the uplink resource; the identification number of the first HARQ-CAK codebook may be 2 bits for distinguishing 4 codebooks. Specifically, the unicast scheduling signaling carrying the response message may be referred to as specific unicast scheduling signaling.

In addition, in another mode, the response message comprises a carrying identification bitmap with K bits, wherein K represents the maximum number of the HARQ-ACK codebooks of the broadcast multicast, when the numerical value of the bit is a first preset value, the corresponding HARQ-ACK codebook is carried, and when the numerical value of the bit is a second preset value, the corresponding HARQ-ACK codebook is not carried. Namely, whether the corresponding HARQ-ACK codebook of the broadcast multicast is carried or not can be indicated in a bitmap mode.

Therefore, the terminal is indicated to multiplex the first HARQ-ACK codebook of the broadcast multicast to the uplink resource corresponding to the unicast through the explicit indication mode, so that the terminal determines whether to multiplex the HARQ-ACK through signaling before judging whether to meet the preset multiplexing condition, and the multiplexing efficiency is improved.

Furthermore, in this embodiment, before determining whether the preset condition is satisfied, the specific information of the preset window needs to be determined. At this time, the present embodiment may obtain configuration information of the preset window predefined by the protocol; or receiving configuration information of the preset window sent by the base station through higher layer signaling, wherein the configuration information comprises a starting reference position (P0) of the preset window, a starting position offset value (offset) and a window length (L) of the preset window.

Specifically, the starting reference position of the preset window is any one of the following:

broadcasting the HARQ-ACK feedback time slot position indicated by the multicast scheduling signaling;

the time slot of the PUCCH resource indicated by the unicast scheduling signaling is located;

the end time of a Physical Downlink Shared Channel (PDSCH) corresponding to the broadcast multicast scheduling signaling;

a time slot where one of the periodic uplink resources configured by the base station is located;

and broadcasting the receiving time of the multicast scheduling signaling.

In addition, specifically, the offset value (offset) of the starting position of the preset window may be a positive value, a negative value, or 0. When the value is positive, the starting position of the window is offset time units (e.g., slots) after point P0; if the value is negative, it indicates that the starting position of the window is offset time units (e.g., slots) before point P0; if 0, the window starts at point P0 when the window starts. For example, the starting position offset value and/or the window length of the preset window is any one of the following items:

when the initial reference position is the HARQ-ACK feedback time slot position indicated by the broadcast multicast scheduling signaling or the time slot position of the PUCCH resource indicated by the unicast scheduling signaling, the initial position deviation value is a positive value, a negative value or 0;

when the initial reference position is the end time of the PDSCH corresponding to the broadcast multicast scheduling signaling, the initial position deviation value is d, wherein d is greater than or equal to the sum of the processing time of the terminal for receiving the PDSCH and the multiplexing time of the first HARQ-ACK corresponding to the broadcast multicast scheduling signaling;

when the initial reference position is a time slot in which one of the periodic uplink resources configured by the base station is located, the initial position offset value is a negative value;

It should be noted that if the offset is constantly equal to 0, the offset parameter may not be set, and the starting position of the preset window is P0.

In addition, in this embodiment, when multiplexing the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling on the uplink resource, the arrangement order between the first HARQ-ACK codebook and the second HARQ-ACK codebook that is originally on the uplink resource may also be limited.

At this time, the arrangement order of the first HARQ-ACK codebook and the second HARQ-ACK codebook existing on the uplink resource may be any one of the following items:

the first HARQ-ACK codebook is positioned in front of the second HARQ-ACK codebook;

the first HARQ-ACK codebook is positioned behind the second HARQ-ACK codebook;

sequencing the PUCCH resources corresponding to the first HARQ-ACK codebook before multiplexing and the PUCCH resources corresponding to the second HARQ-ACK codebook;

the receiving sequence of the broadcast multicast scheduling signaling and the unicast scheduling signaling is used as sequencing.

In addition, when the number of the broadcast multicast scheduling signaling is at least two, and at least two first HARQ-ACK codebooks corresponding to the at least two broadcast multicast scheduling signaling are all multiplexed onto the uplink resource, the order of the at least two first HARQ-ACKs on the uplink resource may be:

and ordering the indexes of the first HARQ-ACK codebook indicated by each broadcast multicast scheduling signaling.

That is, in the present embodiment, when multiplexing the HARQ-ACK codebook, multiplexing may be performed in any of the above-described orders, which is not limited herein.

In addition, in this embodiment, when the number of the uplink resources is at least two, the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling may be multiplexed on the uplink resource closest to the initial reference position of the preset window when the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling is multiplexed on the uplink resource corresponding to the unicast; or multiplexing the first HARQ-ACK codebook on the first uplink resource in the preset window.

Namely, the first HARQ-ACK of the broadcast multicast is limited to be multiplexed on one of a plurality of uplink resources in the above way, and the base station is convenient to receive the first HARQ-ACK.

In this way, after receiving the broadcast multicast scheduling signaling sent by the base station, if the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and the time slot of the uplink resource corresponding to the unicast exist in the preset window at the same time, the embodiment multiplexes the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling onto the uplink resource corresponding to the unicast, simplifies the protocol design and complexity of the broadcast multicast feedback HARQ-ACK, and effectively solves the problem that the PUCCH requires different formats in different positions of the cell.

In addition, as shown in fig. 2, a flowchart of the steps of the HARQ-ACK feedback method applied to the base station in the embodiment of the present invention is shown, where the method includes the following steps:

step 201: and sending the broadcast multicast scheduling signaling to the terminal.

Specifically, after the base station sends the broadcast multicast signaling to the terminal, the terminal may multiplex the first HARQ-ACK codebook corresponding to the broadcast multicast scheduling signaling to the uplink resource corresponding to the unicast when detecting that the preset condition is met, where the preset condition is that the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and the time slot where the uplink resource is located exist in the preset window at the same time. The protocol design and complexity of the broadcast multicast feedback HARQ-ACK are simplified, and the problem that the terminal is in different positions of a cell and the PUCCH needs different formats is effectively solved.

Step 202: and receiving uplink data sent by the terminal through the uplink resources when the preset conditions are met, and obtaining a first HARQ-ACK codebook multiplexed on the uplink resources.

Specifically, the base station further needs to receive uplink data sent by the terminal through the uplink resource when the preset condition is met, and demultiplex the uplink data to obtain the first HARQ-ACK codebook.

Certainly, when the base station demultiplexes to obtain the first HRQ-ACK codebook, demultiplexing needs to be performed based on the order of multiplexing the broadcast multicast first HARQ-ACK codebook at the terminal side.

It should be noted that the base station may further receive HARQ-ACK information fed back on the PUCCH resource indicated by the broadcast multicast scheduling signaling when the terminal detects that the HARQ-ACK feedback slot indicated by the broadcast multicast scheduling signaling and the slot where the uplink resource is located do not exist simultaneously in the preset window.

It should be further noted that, when the number of the uplink resources is at least two, the first HARQ-ACK codebook is multiplexed on the uplink resource closest to the starting reference position of the preset window; or, the first HARQ-ACK codebook is multiplexed on the first uplink resource in the preset window.

In addition, in this embodiment, an uplink resource corresponding to a unicast needs to be configured to the terminal, and at this time, a unicast scheduling signaling may be sent to the terminal, where the unicast scheduling signaling carries scheduling information of the uplink resource; or configuring periodic uplink resource information to the terminal through a high-level signaling so that the terminal determines uplink resources corresponding to unicast based on the periodic uplink resource information; the periodic uplink resource information comprises a sending period and a time slot offset of an uplink resource, and the uplink resource is a Physical Uplink Control Channel (PUCCH) resource or a Physical Uplink Shared Channel (PUSCH) resource.

Specifically, when the uplink resource is a resource for transmitting unicast HARQ-ACK information scheduled by the unicast scheduling signaling, the preset condition further includes: the receiving time of the unicast scheduling signaling is positioned before the HARQ-ACK feedback time slot indicated by the broadcast multicast scheduling signaling and at least separated by X symbols, and the time slot of the uplink resource meets the receiving processing time of the service data corresponding to the broadcast multicast scheduling signaling; and the X value is the sum of the processing time of the terminal for receiving the unicast scheduling signaling and the multiplexing time of the first HARQ-ACK corresponding to the broadcast multicast scheduling signaling.

In addition, in this embodiment, the first downlink control information DCI corresponding to the broadcast multicast scheduling signaling includes a request message for indicating whether the terminal waits for the carried information in the unicast scheduling signaling, and the carried information includes the indication information whether the uplink resource carries the first HARQ-ACK codebook; the second DCI corresponding to the unicast scheduling signaling contains a response message for indicating whether the terminal carries the first HARQ-ACK codebook on the uplink resource.

Specifically, the request message includes a first indication field and an identification number of a first HARQ-ACK codebook, where the first indication field is used to indicate whether the terminal waits for carrying information in unicast scheduling signaling, where a new field is added in the first DCI, and the new field is added with the request message or an original field in the first DCI is added with an indication meaning for the request message; the response message comprises a second indication field and an identification number of the first HARQ-ACK codebook, wherein the second indication field is used for indicating whether the first HARQ-ACK codebook is carried on the uplink resource, the second DCI is provided with a new field, the new field is added with the response message, or the original field in the second DCI is provided with indication meaning for the response message; and the identification number of each HARQ-ACK codebook and the codebook number of the HARQ-ACK have a corresponding relation.

As another mode, the response message includes a carrying identification bitmap with K bits, where K represents the maximum number of the HARQ-ACK codebooks for broadcast multicast, and when the value of a bit is a first preset value, it indicates that the corresponding HARQ-ACK codebook is carried, and when the value of a bit is a second preset value, it indicates that the corresponding HARQ-ACK codebook is not carried.

In addition, in this embodiment, it is also necessary to determine the relevant configuration information of the preset window in advance, and at this time, the base station may obtain the configuration information of the preset window predefined by the protocol; or sending configuration information of the preset window to the terminal through a high-level signaling, wherein the configuration information comprises a starting reference position of the preset window, a starting position deviation value and a window length of the preset window.