CN116366221A

CN116366221A - Method, device and user equipment for selecting to receive or send feedback information

Info

Publication number: CN116366221A
Application number: CN202310470598.XA
Authority: CN
Inventors: 刘兆璘; 冯媛
Original assignee: Beijing Gohigh Data Networks Technology Co ltd
Current assignee: Beijing Gohigh Data Networks Technology Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-06-30

Abstract

The application discloses a method, a device and user equipment for selecting to receive or send feedback information, and relates to the technical field of communication, wherein the method comprises the following steps: under the condition that time domain overlapping occurs between feedback information to be sent and a target time slot where the feedback information to be received is located, acquiring first information related to each feedback information; the first information includes at least one of the following information associated with a first transport block TB related to the feedback information: priority value, propagation type, time domain resource reservation information, feedback mode and feedback result of feedback to be sent; and determining whether to preferentially select to send or receive the feedback information in the target time slot according to the first information related to each feedback information. According to the scheme, more useful feedback information can be guaranteed to be received or sent, so that the influence of half duplex on the reliability of the service packet is reduced.

Description

Method, device and user equipment for selecting to receive or send feedback information

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a user equipment for selectively receiving or sending feedback information.

Background

Due to half-duplex effects, when transmitting and receiving physical through link feedback channels (Physical Sidelink Feedback Channel, PSFCH), one user can only choose to transmit feedback information or receive feedback information for the same PSFCH period/PSFCH feedback occasion. If the user needs to receive the feedback information and send the feedback information at this time, only one of the feedback information can be abandoned. The present standard only mentions that the determination is based on the priority, however, there is a certain limitation in this way, and there may be a situation that the influence of half duplex is large, in addition, there is no mention in the standard how to deal with the situation that the priority is consistent, that is, there is no standardized selection criterion to ensure that the influence of half duplex on the criterion is minimal, and from the standpoint of implementation, it is necessary to implement the method by using a related algorithm.

Disclosure of Invention

The present application is directed to a method, an apparatus, and a user equipment for selecting to receive or transmit feedback information, so as to solve the problem of limitations existing in the current method for selecting to transmit or receive feedback information.

In order to achieve the above object, an embodiment of the present application provides a method for selecting to receive or transmit feedback information, including:

Under the condition that time domain overlapping occurs between feedback information to be sent and a target time slot where the feedback information to be received is located, acquiring first information related to each feedback information; the first information includes at least one of the following information associated with a first transport block TB related to the feedback information: priority value, propagation type, time domain resource reservation information, feedback mode and feedback result of feedback to be sent;

and determining whether to preferentially select to send or receive the feedback information in the target time slot according to the first information related to each feedback information.

Optionally, determining whether to preferentially select to transmit or receive feedback information in the target time slot according to the first information related to each feedback information includes:

determining whether to preferentially select to send or receive feedback information in the target time slot according to the first information related to each feedback information and any one of the following principles:

when the first information meets a first condition, preferentially selecting to send feedback information in the target time slot; wherein the first condition is related to at least one of the propagation type, the time domain resource reservation information, and the feedback mode;

Determining whether to preferentially select to transmit or receive feedback information within the target slot according to a second condition in the case that the first information does not satisfy the first condition, wherein the second condition is related to at least one of the feedback mode, the feedback result, and the priority value;

if the first information does not meet the first condition and the second condition, if at least one propagation type of the first TB related to the first feedback information to be transmitted is distance-based multicast, preferentially selecting to transmit the feedback information in the target time slot;

and if the first information does not meet the first condition, if the feedback modes of the feedback information to be sent are positive/negative acknowledgement (ACK/NACK) modes and the feedback results are ACK, preferentially selecting to receive the feedback information in the target time slot.

Optionally, the first condition includes at least one of:

the HARQ transmission of each first TB related to the feedback information to be received is the last transmission;

the propagation type of at least one first TB related to feedback information to be sent is unicast;

the propagation type of the at least one first TB related to feedback information to be transmitted is multicast based on group management, and the corresponding feedback mode is a negative acknowledgement NACK only mode.

Optionally, according to a second condition, determining whether to preferentially select to transmit or receive feedback information in the target time slot includes:

in the case that the feedback mode includes an ACK/NACK mode and the feedback result to be transmitted includes at least one NACK:

if the feedback mode related to the feedback information to be received only comprises at least one ACK/NACK mode, selecting to receive the feedback information in the target time slot; or alternatively, the process may be performed,

if the feedback mode related to the feedback information to be sent only comprises at least one ACK/NACK mode and the corresponding feedback result comprises NACK, selecting to send the feedback information in the target time slot; or alternatively, the process may be performed,

if the feedback information to be sent and the feedback mode related to the feedback information to be received both comprise at least one ACK/NACK mode, and the corresponding feedback result to be sent comprises NACK, determining whether to send or receive the feedback information in the target time slot preferentially according to the priority value and the time domain resource reservation information.

Optionally, determining whether to preferentially select to send or receive feedback information in the target time slot according to the priority value and the time domain resource reservation information includes:

determining a sending priority value and a receiving priority value according to each priority value;

And determining whether to preferentially select to transmit or receive feedback information in the target time slot according to the transmission priority value and the reception priority value.

Optionally, determining the sending priority value and the receiving priority value according to each priority value includes:

converting the priority values respectively to obtain corresponding priority values of feedback information;

determining a sending priority value according to the priority value of each piece of feedback information to be sent;

and determining the receiving priority value according to the priority value of each piece of feedback information to be received.

Optionally, determining the sending priority value according to the priority value of each feedback information to be sent includes:

and determining that the transmission priority value is the sum of the priority values of the feedback information to be transmitted under the condition that the time domain resource reservation information of each first TB related to the feedback information to be transmitted comprises at least the next transmission resource reservation instruction of the first TB.

acquiring a product of a priority value of corresponding feedback information to be transmitted and a first coefficient under the condition that time domain resource reservation information of at least one first TB related to the feedback information to be transmitted does not comprise at least next transmission resource reservation indication of the first TB;

Determining the transmission priority value as: determining the transmission priority value by the products and the sum of the priority values of feedback information to be transmitted, which is related to the target first TB; the time domain resource reservation information of the target first TB comprises at least a next resource reservation instruction sent by the first TB.

Optionally, the first coefficient is statically configured by the system; alternatively, the first coefficient is a value dynamically configured between a first value and a second value, wherein the first coefficient is related to a system load.

Optionally, determining the receiving priority value according to the priority value of each feedback information to be received includes:

and accumulating the priority value of the feedback information to be received related to the first TB transmitted by the HARQ in the non-last time to obtain the receiving priority value.

Optionally, determining whether to preferentially select to transmit or receive feedback information in the target time slot according to the transmission priority value and the reception priority value includes:

determining to preferentially select to receive feedback information in the target time slot under the condition that the receiving priority value is larger than or equal to the sending priority value;

And determining to preferentially select to transmit feedback information in the target time slot under the condition that the receiving priority value is smaller than the transmitting priority value.

In order to achieve the above object, an embodiment of the present application provides an apparatus for selectively receiving or transmitting feedback information, including:

the acquisition module is used for acquiring first information related to each feedback information under the condition that the feedback information to be sent and the target time slot where the feedback information to be received are overlapped in the time domain; the first information includes at least one of the following information associated with a first transport block TB related to the feedback information: priority value, propagation type, time domain resource reservation information, feedback mode and feedback result of feedback to be sent;

and the determining module is used for determining whether to send or receive the feedback information in the target time slot preferentially according to the first information related to each feedback information.

In order to achieve the above object, an embodiment of the present application provides a third aspect of the present application, including a transceiver, a memory, a processor, and a computer program stored on the memory and running on the processor, where the processor executes the computer program to implement a method for selectively receiving or transmitting feedback information according to the first aspect.

In order to achieve the above object, an embodiment of the present application provides a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implement a method for selectively receiving or transmitting feedback information as described in the first aspect.

The technical scheme of the application has at least the following beneficial effects:

in the method for selecting and receiving or sending feedback information in the embodiment of the present application, first, under the condition that feedback information to be sent and feedback information to be received in a target time slot overlap in time domain, first information related to each feedback information is obtained; the first information includes at least one of the following information associated with a first transport block TB related to the feedback information: priority value, propagation type, time domain resource reservation information, feedback mode and feedback result of feedback to be sent; and secondly, determining whether to send or receive the feedback information in the target time slot preferentially according to the first information related to each feedback information. Therefore, the method and the device realize that more useful feedback information is transmitted or received in the target time slot based on the multiple parameters, and reduce the influence of half duplex on the reliability of the service packet.

Drawings

FIG. 1 is a schematic diagram of PSFCH resource overlap;

fig. 2 is a schematic diagram of a method for selecting to receive or transmit feedback information according to an embodiment of the present application;

fig. 3 is a timing diagram of a user transmitting/receiving TB and feedback in an embodiment of the present application;

FIG. 4 is a second timing diagram of a user sending/receiving TB and feedback in the embodiment of the present application;

FIG. 5 is a third timing diagram of a user sending/receiving TB and feedback in the embodiment of the present application;

fig. 6 is a schematic diagram of an apparatus for selecting to receive or transmit feedback information according to an embodiment of the present application;

fig. 7 is a schematic diagram of a user equipment according to an embodiment of the present application.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present application more apparent, the following detailed description will be given with reference to the accompanying drawings and the specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of embodiments of the present application. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the application. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

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 application. 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 application, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In the examples provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

In describing embodiments of the present application, some concepts and related prior art used in the following description will be explained first.

Hybrid automatic repeat ReQuest (Hybrid Automatic Repeat ReQuest, HARQ) feedback type:

for unicast, the feedback mode defaults to Acknowledgement (ACK)/Negative Acknowledgement (Negative ACKnowledge, NACK);

for multicast based on group management, if the group size and the group member (member) identity (Identity document, ID) are provided by an upper layer, and the PSFCH resource corresponding to the PSSCH can ensure that feedback resources among group members are orthogonal, the feedback mode is an ACK/ackc mode or a NACK only mode is negatively acknowledged, otherwise the feedback mode can only be a NACK only mode;

for distance-based multicasting, the feedback pattern is determined to be a NACK only pattern;

if the broadcast type (cast type) is broadcast, blind retransmission is adopted, and the receiving end does not need to do feedback.

(II) UE feedback capability:

the related protocol specifies that, according to the capability of the user, the amount of feedback sent by the user on the same PSFCH occasion may be selectable according to the capability of the UE: the number of feedback received at the same PSFCH occasion may be selectable according to the UE's capability, 4/8/16: 5/15/25/32/35/45/50/64. For a certain device, a specific value is selected.

(III) HARQ transmission:

For unicast, if an ACK is received, the subsequent transmission is canceled, and if a NACK is received or no feedback information is received (e.g., discontinuous transmission (Discontinuous Transmission, DTX)), the Transport Block (TB) is continuously retransmitted.

For group management based multicast configured as ACK/NACK mode: based on the number of group members and the group member ID provided by the upper layer, if feedback information of the received group members is ACK, canceling the subsequent transmission (at least one ACK is defined by a standard, which is actually dependent on algorithm implementation, or canceling the subsequent transmission after receiving feedback ACKs of all the group members); if a NACK is received by a group member or feedback information (e.g., DTX) is not received by the group member and the current transmission scheduled by the TB is not the last time, the retransmission of the TB is continued.

For group management based multicast configured as NACK only mode: based on the number of group members provided by the upper layer and a group member identification list (ID list), if feedback information of any group member is not received, canceling subsequent transmission; if NACK feedback from the group members is received, the TB is continuously retransmitted.

For distance-based multicast (default configuration to NACK only mode): if no feedback information is received, canceling the subsequent transmission; if NACK feedback from a user is received, the TB is continuously retransmitted.

(IV) HARQ reception:

(1) For a user receiving a TB, if feedback is indicated in the through link control information (Sidelink Control Information, SCI) of the TB and the feedback mode is an ACK/NACK mode, then:

if the receiving TB user decodes the TB successfully at present or before, sending ACK at the corresponding PSFCH period/PSFCH feedback opportunity after the receiving TB user decodes the TB successfully;

if the receiving TB user does not decode the TB successfully at present or before, transmitting NACK at the corresponding PSFCH period/PSFCH feedback opportunity after the receiving TB user;

if the SCI is not successfully decoded, the receiving user cannot know the identity information of the sending user, and no method is available for sending feedback information.

(2) For a user receiving a TB, if feedback is indicated in the SCI of the TB and the feedback mode is NACK only mode, then:

in particular, for a multicast user based on distance, it is necessary to calculate the distance according to the Zone identifier (Zone ID) and the own location information in the SCI first, and if the SCI is not successfully decoded, the receiving user cannot learn to send the user identity information, and does not send feedback information. If the distance is less than or equal to the communication range requirement (Communication range requirement) or no valid location information is obtained locally (e.g., global positioning system (Global Positioning System, GPS) failure, etc.), the TB is received.

If the receiving TB user successfully decodes the TB at the present or before, no feedback information is transmitted.

If the receiving user does not decode the TB successfully at present or before, NACK is sent at the corresponding PSFCH period/PSFCH feedback opportunity after the receiving user.

(five) PSFCH receive and transmit time overlap:

as shown in fig. 1, at the same PSFCH occasion, the user B needs to send and receive the PSFCH, and the existing processing manner in the relevant standard is: if the time when the user needs to transmit the PSFCH and the time when the user needs to receive the PSFCH overlap, the user selects according to the priority (PPPP), that is, selects the TB corresponding to the PSFCH with the highest priority.

As described above, when the feedback user needs to receive feedback information and send feedback information in the same PSFCH period, only one of them can be abandoned. It is proposed in the existing protocols to choose according to priority.

1. If feedback information is sent according to the priority selection, the effect on the user's own presence is:

1.1, if the TB corresponding to the feedback that is discarded from being received is not the last transmission, the user will choose to retransmit the TB because the actual decoding situation is unknown:

firstly, the service transmitting end may retransmit the TB (the last transmission of the TB is successfully decoded), interference may be caused to other users, and the probability of resource collision is increased; both may cause the service transmitting end to use unsuitable redundancy versions (Redundancy Version, RV) (the last transmission of the TB is successful in SCI decoding and the TB is failed in decoding), which affects the performance of the initial retransmission HARQ combining at the receiving end;

1.2, if the TB corresponding to the feedback which is abandoned to be received is transmitted for the last time, the user does not retransmit the TB later, and the reliability of the TB is not affected;

1.3, a PSFCH transmission time may be fed back to multiple TBs transmitted by the user, so there may be multiple feedback sets on a PSFCH, which may cause one or more of the above effects at the same time.

2. If only the non-transmitted feedback is received, the feedback information to be transmitted is known to the user himself, and therefore the effect of the non-transmitted feedback information is also determined:

2.1 if the SCI of the TB corresponding to the feedback that is discarded from transmission has retransmission resource reservation indication information, it is considered that it is not the last transmission:

for the NACK only mode, if NACK is fed back, but the NACK is not fed back actually, the opposite party can misdecode the transmitted TB successfully, cancel the subsequent transmission, lose the service packet and reduce the reliability;

for both, if the ACK/NACK mode needs to be fed back, but the ACK is not fed back actually, the opposite party can misdecode the transmitted TB without success, retransmission is continuously transmitted, interference to other users can be caused, the system load becomes large, and the probability of resource collision is increased;

Three, for ACK/NACK mode, if the feedback NACK is needed, but the feedback is not actually needed, the opposite party can misuse the sent SCI (1-stage SCI or 2-stage SCI) to be unsuccessfully decoded, the selection of retransmission RV is affected, the performance of initial retransmission combination is affected, and the reliability of the service package is also affected;

fourth, for ACK/NACK feedback, whether ACK or NACK is needed, if cast type is unicast, counter count is also affected in unicast radio link failure detection, and stability of unicast links is further affected.

2.2, if no retransmission resource reservation indication information is fed back to the SCI of the corresponding TB, the available resources may not meet the indication requirement, but the probability of occurrence of the situation is low, the situation similar to the situation with retransmission resource reservation indication information is affected, and the larger probability is the last transmission of the TB, and the generated effect is that:

first, since the opposite party does not need to retransmit the TB, only unicast is affected, and counter count is affected in unicast radio link failure detection of the opposite party, and stability of unicast links is further affected.

Both, cast type is not unicast, then there is no impact.

2.3, one PSFCH transmission time may send multiple feedbacks to TBs of different users or different TBs of the same user, so one PSFCH feedback slot/opportunity may be a set of multiple feedbacks, that is, different influences may be caused to different users at the same time.

As is clear from the above description (v), in the half duplex scenario, the performance is affected in most cases, whether the feedback is selected to be transmitted or received, but if the feedback is not selected properly, the reliability of the service packet may not be guaranteed.

In view of the foregoing problems, embodiments of the present application provide a method, an apparatus, and a user equipment for selecting to receive or transmit feedback information, which are described in detail below with reference to the accompanying drawings and specific embodiments:

as shown in fig. 2, an embodiment of the present application provides a method for selecting to receive or transmit feedback information, including:

step 201, under the condition that time domain overlapping occurs between feedback information to be sent and a target time slot where the feedback information to be received is located, acquiring first information related to each feedback information; the first information includes at least one of the following information associated with the first transport block TB related to the feedback information: priority value, propagation type, time domain resource reservation information, feedback mode and feedback result of feedback to be sent;

In this step, the priority value may specifically refer to a priority value of the first TB corresponding to the feedback information, and in particular, in a case where the first TB corresponds to a plurality of service packets, the priority value refers to a priority value of a service packet with a highest priority among the plurality of service packets; in short, the priority value is the highest priority value of the first TB related to the feedback information, where the priority of the first TB is PPPP, for example.

Step 202, determining whether to send or receive feedback information in the target time slot preferentially according to the first information related to each feedback information.

That is, instead of selecting only according to the priority value as in the prior art, it is determined in this step whether to transmit feedback information in the target slot or to receive feedback information in the target slot based on the information of the plurality of dimensions involved in the first information, so that more useful feedback information can be preferentially selected to be transmitted in the target slot or more useful feedback information can be received to minimize the influence of half duplex on the reliability of the service packet.

In the method for selecting and receiving or sending feedback information in the embodiment of the present application, first, under the condition that a time domain overlap occurs between feedback information to be sent and a target time slot where the feedback information to be received is located, first information related to each feedback information is obtained; the first information includes at least one of the following information associated with the first TB related to the feedback information: priority value, propagation type, time domain resource reservation information, feedback mode and feedback result of feedback to be sent; secondly, determining whether to send or receive feedback information in a target time slot preferentially according to first information related to each feedback information; thus, one of the problems that the selection of receiving or transmitting feedback information only according to the priority value has limitation at present is solved, and the two problems are realized, so that the more useful feedback information is determined to be transmitted or received in the target time slot based on the multiple parameters, and the influence of half duplex on the reliability of the service packet is reduced.

As an optional implementation manner, step 201, determining, according to the first information related to each feedback information, whether to preferentially select to send or receive feedback information in the target timeslot, includes:

determining whether to preferentially select to transmit or receive feedback information in a target time slot according to the first information related to each feedback information and any one of the following principles:

(1) When the first information meets the first condition, the feedback information is preferentially selected to be sent in the target time slot; wherein the first condition is associated with at least one of a propagation type, time domain resource reservation information, and a feedback mode;

that is, when at least one of the propagation type, the time domain resource reservation information, and the feedback mode satisfies the corresponding requirement in the preconfigured first condition, the feedback information is selected to be transmitted in the target slot; subsequently, this step will be described in detail with respect to the specific content of the first condition.

(2) If the first information does not satisfy the first condition, determining whether to preferentially select to transmit or receive feedback information in the target time slot according to a second condition, wherein the second condition is related to at least one of a feedback mode, a feedback result and a priority value;

That is, when any one of the propagation type, the time domain resource reservation information, and the feedback mode does not satisfy the corresponding requirement in the preconfigured first condition, then it is further selected whether to transmit or receive the feedback resource in the target slot according to the feedback mode, the feedback content, and the priority value, and likewise, this step will be described in detail later according to the specific content of the second condition.

(3) If the first information does not meet the first condition and the second condition, if at least one first TB propagation type related to the first feedback information to be transmitted is multicast based on distance, preferentially selecting to transmit the feedback information in the target time slot;

that is, when each content included in the first information does not meet the first condition and the second condition, in feedback information (feedback information to be transmitted) to be transmitted in a target time slot, when a propagation type of a corresponding first TB is distance-based multicast, the feedback information is selected to be transmitted in the target time slot, wherein the transmitted feedback information includes feedback information corresponding to the first TB based on distance multicast; therefore, the situation that the opposite terminal UE decodes the service packet successfully by mistake due to the fact that the feedback information is not sent can be avoided, and subsequent sending is canceled, so that the reliability of the service packet is greatly influenced.

As a specific example of this step, as shown in fig. 3, assume: subcarrier spacing (SCS) =15 kHz; PSFCH minimum interval sl-mintimegappsfch=3 slots (time slots, specifically logical time slots); PSFCH Period sl-PSFCH-period=4 slots (time slots, specifically logical time slots); PSFCH receive processing time process_time=1 slot; and the user A receives the TB transmitted by the user B at the slot10, and the TB decoding is successful, and the user A transmits the TB to the user C at the slot11, so that the user A needs to transmit feedback information to the user B at the same time and needs to receive the feedback information transmitted by the user C at the PSFCH transmission time slot 16. Wherein:

if: the user A successfully decodes and analyzes the SCI corresponding to the TB sent by the user B, the TB HARQ is successfully combined, the TB decoding fails, and the content of the SCI message corresponding to the TB sent by the user B is as follows: the retransmission reservation indication exists, the feedback mode is a NACK only mode, cast type is based on distance multicast, and the priority value is 5;

the TB related information sent by the user a is: the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 3;

then: according to the selection principle of the step, the user A selects to send feedback information in the slot16, and does not receive the feedback information sent by the user C. The reason is that: compared with the situation that the influence of feedback information is not received, the influence on the reliability of the service packet of the user B is much larger, the user B can misdecode the service packet successfully, the subsequent transmission is directly canceled, and the service packet is lost; for the service packet a (the service packet sent by the user a), since it is unclear what kind of feedback information will be actually received, the worst case is that the performance gain of the initial retransmission and decoding is affected, and the influence on the reliability of the service packet is relatively small. The service packet a may actually receive the ACK, so that the reliability of the service packet is not affected. Thus, although the service packet of the user a is multicast based on group management and has a high priority, it should be selected to transmit feedback information to the user B in consideration of the combination.

(4) And if the feedback modes of the feedback information to be sent are ACK/NACK modes and the feedback results are ACK, preferentially selecting to receive the feedback information in the target time slot.

That is, when the TBs transmitted by the other users are successfully decoded and the feedback modes are determined to be ACK/NACK modes, feedback information indicating ACK needs to be transmitted to the other users, and if the feedback information is not transmitted, the reliability of the service packet is not affected, and at this time, the reception of the feedback information can be selected.

In a specific example of this step, further taking fig. 3 as an example, if: the content of the SCI message corresponding to the TB sent by the user B is as follows: the retransmission reservation indication is provided, the feedback mode is an ACK/NACK mode, the feedback information is ACK, cast type is multicast based on group management, and the priority value is 3;

the TB related information sent by the user a is: the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 4;

then: according to the selection principle of the step, the user A selects to receive the feedback information sent by the user C in the slot16, and does not send the feedback information to the user B. Because for the user B, the service packet is already decoded successfully, the failure to receive the feedback information only causes multiple retransmissions, which may cause interference to the resources sent by other users, but does not affect the reliability of the own service packet, while for the service packet a (the service packet sent by the user a), since it is unclear what feedback information is actually received, if the feedback information is worse, NACK should be received but not received, the performance gain of the initial retransmission and decoding is affected, which affects the reliability of the service packet. If the ACK is received but not received, the effect is the same as that of the user B. Therefore, the feedback information transmitted by the user C should be selected to be received.

As a specific implementation, the first condition includes at least one of:

(1) The HARQ transmission of each first TB related to the feedback information to be received is the last transmission;

that is, the user a (the execution body of the embodiment of the present application) selects to receive feedback information of the first TB at the target slot when determining that the first TB transmitted by the user a is the last transmission.

As a specific example of the present condition, further taking fig. 3 as an example, if: the content of the SCI message corresponding to the TB sent by the user B is as follows: the retransmission reservation indication is provided, the feedback mode is an ACK/NACK mode, the TB decoding is successful, cast type is multicast based on group management, and the priority value is 3;

the TB related information sent by the user a is: the last time of transmission, the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 2;

then: according to the selection principle, the user a selects to send feedback information in slot16, and does not receive feedback information sent by the user C. The reason is as follows: although the service packet of the user a has higher priority, it is the last transmission, and there is no influence on whether feedback information of the user C is received, and if the user B can receive the feedback information, the subsequent transmission may be cancelled (knowing that the service packet has been successfully decoded), so as to reduce the system load and reduce the probability of collision of other resources.

(2) The propagation type of at least one first TB related to feedback information to be sent is unicast;

that is, in the first TB corresponding to the feedback information to be transmitted in the target time slot, if the propagation type is unicast, the feedback information is selected to be transmitted in the target time slot.

As a specific example of the present condition, further taking fig. 3 as an example, if: the user A decodes the TB sent by the user B successfully, and the content of the SCI message corresponding to the TB sent by the user B is as follows: the retransmission reservation indication exists, the feedback mode is an ACK/NACK mode, cast type is unicast, and the priority value is 2;

then: according to the selection principle, the user a selects to send feedback information in the slot16, and does not receive feedback information sent by the user C. The reason is as follows: the cast type of the TB of the user B is unicast, the priority is higher, if the opposite user does not receive feedback information, the radio link failure detection counter is increased by 1, and if the threshold parameter sl-MaxNumConsetifeDTX is smaller, the unicast link can be frequently released, and the reliability of the service packet is influenced. Therefore, when unicast and multicast service packets are involved, the reliability of the unicast service packets needs to be preferentially ensured.

(3) The propagation type of the at least one first TB related to feedback information to be transmitted is multicast based on group management, and the corresponding feedback mode is a NACK only mode.

That is, in the first TB corresponding to the feedback information to be transmitted in the target slot, if there is multicast based on group management in the propagation type and the feedback mode of the feedback information is NACK only mode, the feedback information is selected to be transmitted in the target slot.

As a specific example of the present condition, further taking fig. 3 as an example, if: the user A successfully decodes and analyzes the SCI corresponding to the TB sent by the user B, the TB HARQ is successfully combined, the TB decoding fails, and the content of the SCI message corresponding to the TB sent by the user B is as follows: the retransmission reservation indication is provided, the feedback mode is a NACK only mode, SCI decoding is successful, cast type is multicast based on group management, and the priority value is 4;

then: according to the selection principle, the user a selects to send feedback information in slot16, and does not receive feedback information sent by the user C. The reason is as follows: the cast types of the TBs of the user a and the user B are multicast types based on group management, although the priority of the TB sent by the user a is higher, the priority is not greatly different, but the influence on the reliability of the service packet of the user B is much larger than that of the TB which does not receive feedback information, the service packet can be wrongly decoded successfully, the subsequent transmission is directly canceled, the service packet is lost, and for the service packet a (the service packet sent by the user a), the influence on the performance gain of the initial retransmission and decoding is relatively small because it is unclear what feedback information is actually received. The service packet a may actually receive the ACK, so that the reliability of the service packet is not affected. Thus, considering comprehensively, the choice should be made to send feedback information to user B.

As an alternative implementation, determining whether to preferentially select to transmit or receive feedback information in the target time slot according to the second condition includes:

in case that the feedback mode includes an ACK/NACK mode and the feedback result to be transmitted includes at least one NACK:

if the feedback mode related to the feedback information to be received only comprises at least one ACK/NACK mode, selecting to receive the feedback information in the target time slot; that is, if the feedback mode of the feedback information to be transmitted does not include the ACK/NACK mode and the feedback mode of the feedback information to be received includes the ACK/NACK, the feedback information is selected to be received in the target slot;

or alternatively, the process may be performed,

if the feedback mode related to the feedback information to be sent only comprises at least one ACK/NACK mode and the corresponding feedback result comprises NACK, selecting to send the feedback information in the target time slot; that is, if the feedback mode of the feedback information to be transmitted includes an ACK/NACK mode, and the feedback result of the feedback information to be transmitted is NACK in the ACK/NACK mode, and the feedback mode of the feedback information to be received does not include the ACK/NACK mode, then the feedback information is selected to be transmitted in the target time slot;

or alternatively, the process may be performed,

Here, it should be noted that "the corresponding feedback result to be sent includes NACK" means that, in feedback information to be sent in the ACK/NACK feedback mode, at least one feedback result carried by the feedback information is NACK.

As an alternative implementation, determining whether to preferentially select to transmit or receive feedback information in the target time slot according to the priority value and the time domain resource reservation information includes:

and determining whether to preferentially select to transmit or receive feedback information in the target time slot according to the transmission priority value and the reception priority value. Specifically, the step may include: determining to preferentially select to receive feedback information in the target time slot under the condition that the receiving priority value is larger than or equal to the transmitting priority value; and/or, in the case that the reception priority value is smaller than the transmission priority value, determining to preferentially select to transmit the feedback information in the target time slot.

In this optional implementation manner, the feedback information is selected to be sent or received in the target time slot based on the priority value of each feedback information, so that the reliability of the service packet with high priority can be ensured to be affected as little as possible by half duplex.

As a specific implementation, determining the sending priority value and the receiving priority value according to the respective priority values includes:

(1) Converting each priority value respectively to obtain a priority value of corresponding feedback information; specifically, in this step, the priority value of each feedback information may be a difference between the preset priority value and the priority value of the first TB related to the feedback information, for example, the priority value of the ith feedback information to be sent may be expressed by the following formula: p (P) _{Hair, i} ＝9-TB _{Hair, i} The method comprises the steps of carrying out a first treatment on the surface of the Wherein P is _{Hair, i} For the priority value of the feedback information, TB _{Hair, i} Is the priority value of the first TB associated with the feedback information.

(2) Determining a sending priority value according to the priority value of each feedback information to be sent;

(3) And obtaining a receiving priority value according to the priority value of each piece of feedback information to be received.

As a more specific implementation manner, determining the transmission priority value according to the priority value of each feedback information to be transmitted includes:

That is, in the case where each first TB related to feedback information to be transmitted is not last transmitted, the final transmission priority is obtained by accumulating the priority values of each feedback information to be transmitted.

As another more specific implementation manner, determining the transmission priority value according to the priority value of each feedback information to be transmitted includes:

acquiring a product of a priority value of corresponding feedback information to be transmitted and a first coefficient under the condition that time domain resource reservation information of at least one first TB related to the feedback information to be transmitted does not comprise at least next transmission resource reservation indication of the first TB; here, the "corresponding feedback information to be transmitted" refers to feedback information to be transmitted corresponding to a first TB that does not include at least a next transmission resource reservation indication of the present first TB.

That is, in the case where there is a first TB for which no resource reservation indication is transmitted next among the respective first TBs related to feedback information to be transmitted, the priority value of feedback information corresponding to the first TB (the first TB for which no resource reservation indication is transmitted next) is multiplied by the first coefficient, for example, the first coefficient is any value between 0 and 1.

Determining a transmission priority value as: each product and a sum of priority values of feedback information to be transmitted related to the target first TB; the time domain resource reservation information of the target first TB comprises at least next transmission resource reservation indication of the first TB.

For the received first TB without the next resource reservation indication, since the opposite terminal will not transmit the first TB again with a high probability, whether the opposite terminal receives feedback information of the home terminal (the execution body of the application) has a smaller influence on the reliability of the service packet, so that the specific implementation manner reduces the priority value of the feedback information to be transmitted corresponding to the first TB without the next resource reservation indication, so that the total transmission priority value is reduced.

Here, the time domain resource reservation information of the first TB does not include at least a next transmission resource reservation instruction of the first TB, or the first TB does not have a next transmission resource reservation instruction, where one possible case is that the current transmission is the last transmission of the first TB, and another possible case is that the first TB cannot reserve the next transmission resource due to dynamic adjustment of the time domain resource.

Specifically, in this more specific implementation, the first coefficient is statically configured by the system; alternatively, the first coefficient is a value dynamically configurable between a first value and a second value, wherein the first coefficient is related to the system load.

Here, it should be noted that the first value may be 0, and the second value may be 1, that is, the first coefficient may be dynamically adjusted between (0, 1), where if the current system load is small, the resources are abundant, and the latter one of the selected transmission resources can be substantially indicated by the former resource, in this case, if there is no indication of at least the next transmission resource reservation of the first TB in the time domain resource reservation information, the probability that the first TB is the last transmission is relatively large, and the first coefficient may be adjusted to be smaller; if the current system is heavily loaded and resources are tensed, the last resource in the selected transmission resources can not be indicated by the previous resources, in this case, if at least the next transmission resource reservation indication of the first TB is not included in the time domain resource reservation information, the probability that the first TB is the last transmission is smaller, and the first coefficient can be adjusted to be larger.

As still another more specific implementation, determining the reception priority value according to the priority value of each feedback information to be received includes:

and accumulating the priority value of the feedback information to be received, which is related to the first TB transmitted by the HARQ in the non-last time, to obtain a receiving priority value. That is, the reception priority value is the sum of the priority values of other feedback information to be received except for the feedback information to be received corresponding to the first TB transmitted last time.

The following describes a specific implementation procedure for determining whether to preferentially select to transmit or receive feedback information in a target time slot according to a priority value and time domain resource reservation information with reference to two specific examples:

as shown in fig. 4, assume that: SCS = 15kHz; PSFCH minimum interval sl-mintimegappsfch=3 slots (logical slots); PSFCH Period sl-PSFCH-period=4 slots (logical slots); PSFCH receive processing time process_time=1 slot; user a receives TBs sent by users B and C at slot10, and the TB decoding is successful, sends TBs to user D at slot11, sends TBs to users E and F at slot12, and receives TBs sent by users G and H at slot13, then at PSFCH send time slot16, user a needs to send feedback information to B, C, G and H at the same time, and needs to receive feedback information sent by users D, E and F. Wherein:

The user A successfully decodes and analyzes the SCI corresponding to the TB sent by the user B, the TB HARQ is successfully combined, the TB decoding fails, and the content of the SCI message corresponding to the TB sent by the user B is as follows: the retransmission reservation indication exists, the feedback mode is ACK/NACK mode cast type, the multicast based on group management is adopted, and the priority value is 2;

the user A successfully decodes and analyzes the SCI corresponding to the TB sent by the user C, the TB HARQ is successfully combined, the TB decoding fails, and the content of the SCI message corresponding to the TB sent by the user C is as follows: the retransmission reservation indication exists, the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 3;

decoding and analyzing corresponding to the TB sent by the user G are successful, the TB HARQ is successfully combined, the TB decoding is failed, and the content of the SCI message corresponding to the TB sent by the user G is as follows: no retransmission reservation indication exists, the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 3;

the user A successfully decodes and analyzes the SCI corresponding to the TB sent by the user H, the TB HARQ is successfully combined, the TB decoding fails, and the content of the SCI message corresponding to the TB sent by the user H is as follows: the retransmission reservation indication exists, the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 4;

The TB related information sent by the user a to the user D is: the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 2;

the TB related information sent by the user a to the user E is: the last time of transmission, the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 2;

the TB related information sent by the user a to the user F is: the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 2;

then according to the selection principle, the feedback modes corresponding to the feedback information which the user A needs to receive are all ACK/NACK modes, the feedback modes corresponding to the feedback information which needs to be sent are all ACK/NACK modes, and the feedback information is NACK;

processing the TB priority corresponding to the feedback information needed to be sent by the user A, and P _B ＝7，P _C ＝6，P _G ＝6，P _H ＝5；

Then the TB priority corresponding to the feedback that user A needs to receive is processed, P _D ＝7，P _F =6, since the TB addressed to user E is already the last transmission, no consideration is needed;

it is detected that the current system load is large, and therefore the first coefficient k=0.7 is adjusted, then P _{Hair brush} ＝P _B +P _C +K*P _G +P _H ＝22.2，P _{Collecting and recovering} ＝P _D +P _F =14, because of P _{Hair brush} ＞P _{Collecting and recovering} The feedback information is selected to be sent to the users B, C, G and H.

As shown in fig. 5, assume that: SCS = 15kHz; PSFCH minimum interval sl-mintimegappsfch=3 slots (logical slots); PSFCH Period sl-PSFCH-period=4 slots (logical slots); PSFCH receive processing time process_time=1 slot; the user a receives the TB sent by the user B at the slot10, and the TB is successfully decoded, sends the TB to the user C at the slot11, sends the TB to the user D at the slot12, and receives the TB sent by the user E at the slot13, then at the PSFCH sending time slot16, the user a needs to send feedback information to both B and E, and needs to receive the feedback information sent by the users C and D. Wherein:

the user A successfully decodes and analyzes the SCI corresponding to the TB sent by the user B, the TB HARQ is successfully combined, the TB decoding fails, and the content of the SCI message corresponding to the TB sent by the user B is as follows: the retransmission reservation indication exists, the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 2;

the decoding analysis and the TB HARQ combination of the TB sent by the user E are successful, the TB decoding fails, and the content of the SCI message corresponding to the TB sent by the user E is as follows: no retransmission reservation indication exists, the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 3;

The TB related information sent by the user a to the user C is: the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 2;

the TB related information sent by the user a to the user D is: the feedback mode is an ACK/NACK mode, cast type is multicast based on group management, and the priority value is 4;

then according to the selection principle, the feedback modes corresponding to the feedback information needed to be received by the user A are all ACK/NACK modes, the feedback modes corresponding to the feedback information needed to be sent are all ACK/NACK modes, and the feedback information is NACK;

processing the TB priority corresponding to the feedback information needed to be sent by the user A, and P _B ＝7，P _E ＝6；

Processing the TB priority corresponding to the feedback information needed to be received by the user A, and P _C ＝7，P _D ＝5；

Detecting that the current system load is small, e.g. the channel busy rate (Channel Busy Ratio, CBR) is below a certain threshold, thus adjusting the first coefficient k=0.2, p _{Hair brush} ＝P _B +K*P _E ＝7.2，P _{Collecting and recovering} ＝P _D +P _F =12, because of P _{Collecting and recovering} ＞P _{Hair brush} The feedback information sent by users C and D is selected to be received.

The method for selectively receiving or sending feedback information in the above embodiment of the present application proposes a selection policy for sending and receiving feedback information under specific conditions (priority, cast type, feedback mode, feedback result, feedback number, PSCCH/PSSCH retransmission number), so as to ensure that more useful feedback information is received or sent, and reduce the influence of half duplex on the reliability of service packets.

As shown in fig. 6, the embodiment of the present application further provides an apparatus for selectively receiving or sending feedback information, including:

the acquiring module 601 is configured to acquire first information related to each feedback information when time-domain overlapping occurs between feedback information to be sent and a target time slot in which the feedback information to be received is located; the first information includes at least one of the following information associated with a first transport block TB related to the feedback information: priority value, propagation type, time domain resource reservation information, feedback mode and feedback result of feedback to be sent;

a determining module 602, configured to determine, according to the first information related to each feedback information, whether to preferentially select to send or receive feedback information in the target timeslot.

Optionally, the determining module 602 includes:

a determining submodule, configured to determine whether to preferentially select to send or receive feedback information in the target time slot according to first information related to each feedback information and any one of the following principles:

Optionally, the first condition includes at least one of:

Optionally, the determining submodule is configured to determine whether to preferentially select to send or receive feedback information in the target time slot according to a second condition, including:

Optionally, the determining submodule is configured to, when determining to preferentially select to send or receive feedback information in the target timeslot according to the priority value and the time domain resource reservation information, specifically:

Optionally, the determining submodule is specifically configured to, when configured to determine the sending priority value and the receiving priority value according to each priority value:

Optionally, the determining submodule is specifically configured to, when determining the sending priority value according to the priority value of each feedback information to be sent:

determining the transmission priority value as: each of the products, and a sum of priority values of feedback information to be transmitted, which is related to the target first TB; the time domain resource reservation information of the target first TB comprises at least a next resource reservation instruction sent by the first TB.

Optionally, the determining submodule is specifically configured to, when determining the receiving priority value according to the priority value of each feedback information to be received:

Optionally, the determining submodule is configured to, when determining to preferentially select to send or receive feedback information in the target timeslot according to the sending priority value and the receiving priority value, specifically:

It should be noted that, the device for selectively receiving or sending feedback information provided in the embodiment of the present application can implement all the method steps implemented in the method embodiment for selectively receiving or sending feedback information, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.

As shown in fig. 7, the embodiment of the present application further provides a user equipment, including a transceiver 710, a memory 720, a processor 700, and a computer program stored in the memory 720 and running on the processor 700, where when the processor 700 executes the computer program, the processes of the embodiments of the method for selectively receiving or sending feedback information described above are implemented, and the same technical effects can be achieved, and in order to avoid repetition, a detailed description is omitted herein.

The transceiver 710 is configured to receive and transmit data under the control of the processor 700.

Wherein in fig. 7, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 700 and various circuits of memory represented by memory 720, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 710 may be a number of elements, i.e. comprising a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 730 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 in performing operations.

The embodiment of the present application further provides a readable storage medium, where a program is stored, where the program, when executed by a processor, implements each process of the above-described method embodiment for selectively receiving or sending feedback information, and the same technical effect can be achieved, so that repetition is avoided, and no further description is given here. Wherein the readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the foregoing is directed to the preferred embodiments of the present application, it should be noted that modifications and adaptations to those embodiments may occur to one skilled in the art and that such modifications and adaptations are intended to be comprehended within the scope of the present application without departing from the principles set forth herein.

Claims

1. A method of selecting to receive or transmit feedback information, comprising:

2. The method of claim 1 wherein determining whether to prefer to transmit or receive feedback information in the target time slot based on the first information associated with each feedback information comprises:

3. The method of claim 2, wherein the first condition comprises at least one of:

4. The method of claim 2, wherein determining whether to prioritize transmission or reception of feedback information within the target time slot based on a second condition comprises:

5. The method of claim 4, wherein determining whether to prioritize transmission or reception of feedback information within the target time slot based on the priority value and the time domain resource reservation information comprises:

6. The method of claim 5, wherein determining a transmit priority value and a receive priority value from each of the priority values comprises:

7. The method of claim 6, wherein determining the transmission priority value based on the priority value of each feedback information to be transmitted comprises:

8. The method of claim 6, wherein determining the transmission priority value based on the priority value of each feedback information to be transmitted comprises:

9. The method of claim 8, wherein the first coefficient is statically configured by a system; alternatively, the first coefficient is a value dynamically configured between a first value and a second value, wherein the first coefficient is related to a system load.

10. The method of claim 6, wherein determining the reception priority value based on the priority value of each feedback information to be received comprises:

11. The method of claim 5, wherein determining whether to prioritize transmission or reception of feedback information within the target time slot based on the transmission priority value and the reception priority value comprises:

12. An apparatus for selectively receiving or transmitting feedback information, comprising:

13. A user equipment comprising a transceiver, a memory, a processor and a computer program stored on the memory and running on the processor, characterized in that the processor implements the method of selecting to receive or transmit feedback information according to any of claims 1-11 when executing the computer program.

14. A readable storage medium having stored thereon a program or instructions which when executed by a processor implements a method of selectively receiving or transmitting feedback information according to any of claims 1 to 11.