CN112398631B

CN112398631B - Codebook-based feedback method and codebook-based feedback equipment

Info

Publication number: CN112398631B
Application number: CN202010403989.6A
Authority: CN
Inventors: 周淼; 吴敏; 王轶; 孙霏菲
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2019-08-13
Filing date: 2020-05-13
Publication date: 2024-04-23
Anticipated expiration: 2040-05-13
Also published as: CN112398631A

Abstract

The embodiment of the application provides a feedback method and device based on a codebook, wherein the feedback method based on the codebook comprises the following steps: sending a bypass transmission to the second UE; receiving HARQ-ACK feedback information sent by a second UE; generating second HARQ-ACK feedback information corresponding to bypass transmission according to the received first HARQ-ACK feedback information; generating a first HARQ-ACK codebook including second HARQ-ACK feedback information; and reporting the first HARQ-ACK codebook to the base station. The method provided by the application realizes that the second HARQ-ACK feedback information corresponding to the bypass transmission is reported together or independently.

Description

Codebook-based feedback method and codebook-based feedback equipment

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a codebook-based feedback method and apparatus.

Background

In long term evolution (Long Term Evolution, LTE) technology, bypass communication includes two main mechanisms, namely direct communication from terminal to terminal (D2D) and vehicle-to-external communication (Vehicle to Vehicle/Infrastructure/PEDESTRIAN/Network, collectively abbreviated as V2X), where V2X is designed based on D2D technology, and is superior to D2D in terms of data rate, latency, reliability, link capacity, etc., and is the most representative bypass communication technology in LTE technology.

In the LTE V2X system, bypass communication also defines different physical channels, including a physical bypass Control Channel (PSCCH, physical Sidelink Control Channel) and a physical bypass shared Channel (PSSCH, physical Sidelink Shared Channel). The PSSCH is used for carrying data, and the PSCCH is used for carrying bypass control information (Sidelink control information, SCI) which indicates the information such as the time-frequency domain resource position, the modulation coding scheme, the receiving target ID aimed by the PSSCH and the like of the associated PSSCH transmission. Sub-channels (sub-channels) are also defined in the bypass communication as the minimum unit of resource allocation, mainly for the division of sub-channels for data channels, but the concept can be similarly applied to control channels.

From the resource allocation point of view, two modes are included in the LTE V2X system: a resource allocation pattern (Mode 3) based on base station scheduling and a resource allocation pattern (Mode 4) autonomously selected by the UE. Both modes are based on subchannels defined in the bypass system, and the base station schedules or UE autonomously selects several control and/or data subchannels for bypass transmission.

The 5G NR (Fifth-Generation New Radio, new air interface technology for Fifth generation mobile communication) system is an evolution technology of LTE, and accordingly further evolution of bypass communication is also included, and the concept of PSCCH and PSSCH is similarly introduced in NR V2X, and also supports a resource allocation Mode (Mode 1) based on base station scheduling and a resource allocation Mode (Mode 2) selected autonomously by the UE.

Unlike the bypass communication system of LTE, which does not support HARQ-ACK feedback, HARQ-ACK feedback mechanism is also introduced in NR V2X, which is suitable for unicast and multicast traffic. After the transmitting end UE transmits the data and the corresponding SCI, the receiving end UE transmits corresponding HARQ-ACK feedback information to the transmitting end UE, so that the transmitting end judges whether the data needs to be retransmitted or not. The HARQ-ACK Feedback information is transmitted on a bypass Channel, and in NR V2X, a Channel for carrying the HARQ-ACK Feedback information on the bypass Channel is defined as a physical bypass Feedback Channel (PHYSICAL SIDELINK Feedback Channel, PSFCH).

In NR V2X Mode 1, the resources used for the bypass transmission are scheduled by the base station (gNB) to the transmitting UE. If the bypass transmission starts HARQ-ACK feedback, the sending end UE sends the bypass transmission according to the dispatching of the base station and obtains the HARQ-ACK feedback of the receiving end UE, and then the HARQ-ACK feedback can be reported to the base station. The HARQ-ACK feedback may be used for the transmitting UE to request retransmission resources from the base station. The HARQ-ACK feedback information is transmitted on the uplink channel.

The HARQ-ACK feedback reported to the bypass sending end UE from the bypass receiving end UE and the HARQ-ACK feedback reported to the base station from the bypass sending end UE can use the HARQ-ACK codebook to feed back the two types of feedback information, so that a larger amount of information is carried on one HARQ feedback resource or one HARQ feedback channel, and the cost introduced by feedback information transmission is reduced.

In the NR V2X system, since HARQ-ACK feedback is a feature that is introduced completely new compared with LTE, the transmission of HARQ-ACK feedback information corresponding to bypass transmission on the bypass in the prior art lacks a specific mechanism. For the process that the transmitting end UE reports the HARQ-ACK feedback to the base station, the HARQ-ACK codebook used in the NR system can only be used for the HARQ-ACK feedback corresponding to the downlink transmission, and the capability of reporting the HARQ-ACK feedback information corresponding to the bypass transmission together or independently is lacking.

Disclosure of Invention

The application provides a feedback method and device based on a codebook aiming at the defects of the existing mode, which are used for solving the technical defects.

In a first aspect, a codebook-based feedback method is provided, applied to a first user equipment UE, including:

sending a bypass transmission to the second UE;

receiving HARQ-ACK feedback information sent by a second UE;

Generating second HARQ-ACK feedback information corresponding to bypass transmission according to the received first HARQ-ACK feedback information;

generating a first HARQ-ACK codebook including second HARQ-ACK feedback information;

And reporting the first HARQ-ACK codebook to the base station.

Optionally, the first HARQ-ACK codebook includes a first HARQ-ACK dynamic codebook, and generating the first HARQ-ACK codebook including the second HARQ-ACK feedback information includes:

Determining Physical Uplink Control Channel (PUCCH) resources carrying second HARQ-ACK feedback information;

Determining an accumulated downlink allocation index C-DAI and/or a total downlink allocation index T-DAI corresponding to the second HARQ-ACK feedback information according to the PUCCH resource;

Generating HARQ-ACK information bits corresponding to the second HARQ-ACK feedback information;

And generating a first HARQ-ACK dynamic codebook according to at least one of the C-DAI and the T-DAI and the HARQ-ACK information bit.

Optionally, determining the physical uplink control channel PUCCH resource carrying the second HARQ-ACK feedback information includes:

The bypass transmission is scheduled by bypass authorization, and when determining that a Physical Downlink Control Channel (PDCCH) detection opportunity MO carrying downlink control information DCI of the bypass authorization and/or a Physical Downlink Shared Channel (PDSCH) resource carrying the bypass authorization is in a time slot n, second HARQ-ACK feedback information for transmitting bypass data on a PUCCH in the sum of the time slots n and m is determined;

m is determined by at least one of a bypass HARQ-ACK timing indicator indicated in a bypass grant, a higher layer parameter, a configured offset, a pre-defined offset, the n and m being real numbers;

The bypass HARQ-ACK timing indicator indicated in the bypass grant comprises at least one of: the PDSCH to HARQ-ACK feedback timing indicator, the PDCCH MO to HARQ-ACK feedback timing indicator, the physical bypass shared channel PSSCH to HARQ-ACK feedback timing indicator, the physical bypass control channel PSCCH to HARQ-ACK feedback timing indicator, and the physical bypass feedback channel PSFCH to HARQ-ACK feedback timing indicator.

Optionally, generating the first HARQ-ACK dynamic codebook including the second HARQ-ACK feedback information includes:

Multiplexing the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission in the same first HARQ-ACK dynamic codebook or the same subcodebook of the first HARQ-ACK dynamic codebook;

or generating independent HARQ-ACK dynamic codebooks for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission respectively;

Or respectively generating independent subcodebooks of the first HARQ-ACK dynamic codebook for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission.

Optionally, multiplexing the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission in the same first HARQ-ACK dynamic codebook or in the same sub-codebook of the first HARQ-ACK dynamic codebook, further comprising at least one of:

The bypass transmissions are scheduled by a bypass grant, the C-DAI of the bypass grant and PDSCH reception associated with DCI format 1_0 being jointly counted;

The bypass transmissions are scheduled by a bypass grant, the bypass grant C-DAI and the C-DAI released by the semi-persistent schedule SPSPDSCH associated with DCI format 1_0 being jointly counted;

The bypass transmissions are scheduled by a bypass grant, the C-DAI of the bypass grant and PDSCH reception associated with DCI format 1_1 being jointly counted;

The bypass transmissions are scheduled by a bypass grant, the bypass grant C-DAI and the SPS PDSCH released C-DAI associated with DCI format 1_1 being jointly counted;

The bypass transmissions are scheduled by a bypass grant, which is jointly counted with the T-DAI received by the PDSCH associated with DCI format 1_1.

Optionally, generating the first HARQ-ACK dynamic codebook including the second HARQ-ACK feedback information further includes at least one of:

Determining whether at least one bypass transmission enables CBG transmission according to at least one of the configured information, the preconfigured information, and the predefined information;

if CBG transmission is not enabled, generating a second HARQ-ACK feedback information based on the TB or HARQ-ACK information bits corresponding to the second HARQ-ACK feedback information for at least one bypass transmission;

If CBG transmission is enabled, generating second HARQ-ACK feedback information based on CBG or HARQ-ACK information bits corresponding to the second HARQ-ACK feedback information for at least one bypass transmission;

the bypass transmission includes at least one of:

A bypass transmission in a serving cell, a bypass transmission in a bypass resource pool, a bypass transmission in a bypass transmission mode, a bypass transmission of a traffic type, a bypass transmission of a transmission type, a bypass transmission corresponding to a class of grants, a given bypass transmission at a time.

Optionally, generating the CBG-based second HARQ-ACK feedback information or HARQ-ACK information bits corresponding to the second HARQ-ACK feedback information for the at least one bypass transmission, comprising:

acquiring a value of a maximum number of coded block groups CBGs contained in one transport block TB of bypass data included in the bypass transmission;

obtaining a value of a maximum number of coded block groups CBGs contained in one transport block TB of bypass data comprised by the bypass transmission, comprising at least one of the following:

configuration acquisition related to CBG through bypass, and configuration acquisition related to CBG through bypass resource pool.

Optionally, generating a first HARQ-ACK dynamic codebook corresponding to the bypass transmission includes:

Generating a first HARQ-ACK dynamic sub-codebook and a second HARQ-ACK dynamic sub-codebook, wherein the first HARQ-ACK dynamic sub-codebook corresponds to third HARQ-ACK feedback information based on downlink transmission of a TB and/or second HARQ-ACK feedback information based on bypass transmission of the TB, and the second HARQ-ACK dynamic sub-codebook corresponds to third HARQ-ACK feedback information based on downlink transmission of a CBG and/or second HARQ-ACK feedback information based on bypass transmission of the CBG.

Optionally, the C-DAI and T-DAI corresponding to the first HARQ-ACK dynamic sub-codebook and the second HARQ-ACK dynamic sub-codebook are counted separately, and the C-DAI and/or T-DAI corresponding to the bypass transmission and the downlink transmission in the first HARQ-ACK dynamic sub-codebook and the second HARQ-ACK dynamic sub-codebook are jointly counted.

Optionally, when P configured bypass grants are activated and the bypass transmission scheduled by the configured bypass grants meets a preset condition, adding second HARQ-ACK feedback information of the bypass transmission scheduled by the activated P configured bypass grants at the tail of the first HARQ-ACK dynamic codebook and/or the tail of the dynamic codebook including the bypass HARQ-ACK feedback information corresponding to the dynamic bypass grants, where P is a positive integer.

Optionally, generating the first HARQ-ACK dynamic codebook further includes at least one of:

In the first HARQ-ACK dynamic codebook, adding HARQ-ACK information bits corresponding to SPS PDSCH, and then adding HARQ-ACK information bits corresponding to configured bypass grant;

Sequencing SPS PDSCH and HARQ-ACK information bits corresponding to the configured bypass authorization according to the same criterion, and sequentially adding the sequencing SPS PDSCH and the HARQ-ACK information bits into the first HARQ-ACK dynamic codebook;

Adding the HARQ-ACK information bit of the bypass authorization correspondingly configured at the tail part of the sub-codebook of the first HARQ-ACK dynamic codebook corresponding to the second HARQ-ACK feedback information of the bypass transmission;

And adding HARQ-ACK information bits corresponding to the SPS PDSCH at the tail part of a sub-codebook of the first HARQ-ACK dynamic codebook corresponding to the third HARQ-ACK feedback information of downlink transmission.

Optionally, generating an independent HARQ-ACK dynamic codebook or an independent sub-codebook of the first HARQ-ACK dynamic codebook for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission, respectively, further includes:

The downlink HARQ-ACK dynamic codebook corresponding to the third HARQ-ACK feedback information of the downlink transmission and the bypass HARQ-ACK dynamic codebook corresponding to the second HARQ-ACK feedback information of the bypass transmission are arranged in sequence to generate a first HARQ-ACK dynamic codebook;

C-DAI and/or T-DAI corresponding to the downlink HARQ-ACK dynamic codebook and C-DAI and/or T-DAI corresponding to the bypass HARQ-ACK dynamic codebook are respectively counted;

C-DAI represents the number of accumulated pairs of information including serving cell and PDCCH MO; in the information pair, there is a bypass grant and/or transmission and/or reception of a bypass physical shared channel, PSSCH, of the bypass grant schedule;

T-DAI represents the total number of information pairs including serving cell and PDCCH MO; in the information pair, there is a bypass grant and/or transmission and/or reception of the bypass grant scheduled PSSCH.

Optionally, the first HARQ-ACK codebook includes a first HARQ-ACK semi-static codebook, and generating the first HARQ-ACK codebook including the second HARQ-ACK feedback information includes:

Determining PUCCH resources carrying second HARQ-ACK feedback information;

determining a candidate bypass receiving opportunity set according to the PUCCH resource;

Generating a corresponding HARQ-ACK information bit for each candidate bypass reception occasion in the set of candidate bypass reception occasions;

And placing the generated HARQ-ACK information bits in sequence for generating a first HARQ-ACK semi-static codebook comprising the second HARQ-ACK feedback information.

Determining PUCCH resources carrying second HARQ-ACK feedback information;

According to the PUCCH resources, a candidate bypass receiving opportunity set and a candidate PDSCH receiving opportunity set are determined;

Generating corresponding HARQ-ACK information bits for each candidate bypass reception opportunity and each candidate PDSCH reception opportunity in a candidate bypass reception opportunity set and the candidate PDSCH reception opportunity set;

Optionally, multiplexing the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission in the same first HARQ-ACK semi-static codebook or in the same sub-codebook of the first HARQ-ACK semi-static codebook;

or generating independent HARQ-ACK semi-static codebook for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission respectively;

Or respectively generating independent subcodebooks of the first HARQ-ACK semi-static codebook for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission.

Optionally, determining the set of candidate bypass reception opportunities includes:

A set of candidate bypass reception occasions is determined for the partial bandwidth BWP and/or resource pool for bypass activated in each serving cell corresponding to a given HARQ-ACK feedback time unit.

Optionally, determining candidate bypass reception opportunities in the set of candidate bypass reception opportunities comprises:

For the activated BWP and/or resource pool for bypass in each serving cell corresponding to a given HARQ-ACK feedback time unit, at least one of a time domain resource range, a frequency domain resource range, a code domain resource range comprising candidate bypass reception opportunities is determined.

Optionally, determining the time domain resource range including the candidate bypass reception occasion includes:

Acquiring a time slot time sequence set q associated with BWP and/or a resource pool, wherein q is used for indicating a time domain interval between reporting of second HARQ-ACK feedback information corresponding to bypass transmission and bypass transmission;

When a given HARQ-ACK feedback time unit is positioned in a time slot n, sequentially judging whether bypass transmission is possible to exist on the time slot n-q according to all possible values of q, wherein n-q represents the difference between n and q;

When there may be a bypass transmission, the bypass resource corresponding to slot n-q is counted into a candidate set of bypass reception opportunities.

Optionally, determining the number of bypass resources that may be used for bypass transmission and exist in a time slot according to at least one of a frequency domain resource range, a code domain resource range, and a configuration of resources used for bypass transmission of the bypass reception opportunity;

the number of candidate bypass reception occasions to be counted in time slots n-q is determined.

Optionally, in the process of generating the first HARQ-ACK semi-static codebook corresponding to the bypass transmission, determining the number of bypass resources that may be used for the bypass transmission and exist in one slot includes:

determining the total size of bypass resources existing in a time slot according to at least one of the frequency domain resource range and the code domain resource range of the candidate bypass receiving opportunity;

The number of bypass resources that may be used for bypass transmission that are present in one slot is determined based on the total size and at least one of the time domain granularity, the frequency domain granularity, the code domain granularity of the resources used for bypass transmission indicated in the configuration of the resources used for bypass transmission.

ordering all candidate bypass reception opportunities in the candidate bypass reception opportunity set according to a preset criterion; the predetermined criteria include:

the BWP index, the resource pool index, the frequency domain index, the time domain index, and the code domain index are sorted in ascending order according to a predetermined order.

Optionally, generating a first HARQ-ACK semi-static codebook corresponding to the bypass transmission includes:

generating corresponding first-type HARQ-ACK information bits for each candidate PDSCH receiving opportunity in the candidate PDSCH receiving opportunity set, and generating corresponding second-type HARQ-ACK information bits for each candidate bypass receiving opportunity in the candidate bypass receiving opportunity set;

and combining the first type HARQ-ACK information bits and the second type HARQ-ACK information bits to generate a first HARQ-ACK semi-static codebook.

Optionally, determining the set of candidate bypass reception opportunities and the set of candidate PDSCH reception opportunities includes:

According to a preset criterion, carrying out joint sequencing on all candidate receiving opportunities in the candidate bypass receiving opportunity set and the candidate PDSCH receiving opportunity set;

predetermined criteria, including at least one of:

ordering according to a predetermined order in an ascending order of at least one of BWP index, resource pool index, frequency domain index, time domain index, code domain index;

And ordering the bypass receiving opportunities and the candidate PDSCH receiving opportunities corresponding to at least one of BWP indexes, resource pool indexes, frequency domain indexes, time domain indexes and code domain indexes according to a preset sequence between the downlink and the bypass.

Optionally, when the first UE determines that bypass data is not transmitted on one PSSCH and/or PSCCH of the configured bypass grant schedule, HARQ-ACK feedback information of the corresponding PSSCH and/or PSCCH generated by the first UE is ACK.

Optionally, generating the first HARQ-ACK dynamic codebook includes generating a dynamic codebook including bypass HARQ-ACK feedback information corresponding to the dynamic bypass grant and/or bypass HARQ-ACK feedback information corresponding to the configured bypass grant, including at least one of:

Generating a dynamic codebook comprising bypass HARQ-ACK feedback information corresponding to the dynamic bypass grant according to at least one of C-DAI and T-DAI and HARQ-ACK information bits, wherein at least one of C-DAI and T-DAI is C-DAI and/or T-DAI indicated in the dynamic bypass grant, and the HARQ-ACK information bits are HARQ-ACK information bits corresponding to bypass transmission scheduled by the dynamic bypass grant;

Adding the bypass HARQ-ACK feedback information corresponding to the configured bypass authorization to the tail part of a dynamic codebook comprising the bypass HARQ-ACK feedback information corresponding to the dynamic bypass authorization;

and adding bypass HARQ-ACK feedback information corresponding to the configured bypass authorization to the tail part of the first HARQ-ACK dynamic codebook.

Optionally, when Q configured bypass grants are obtained in total, adding second HARQ-ACK feedback information of bypass transmission scheduled by all Q configured bypass grants at the tail of the first HARQ-ACK dynamic codebook and/or the tail of the dynamic codebook including bypass HARQ-ACK feedback information corresponding to the dynamic bypass grants, where Q is a positive integer.

Optionally, adding the configured bypass HARQ-ACK feedback information corresponding to the bypass grant at the tail of the dynamic codebook including the bypass HARQ-ACK feedback information corresponding to the dynamic bypass grant and/or adding the configured bypass HARQ-ACK feedback information corresponding to the bypass grant at the tail of the first HARQ-ACK dynamic codebook includes:

adding configured bypass authorized HARQ-ACK information bits in a predetermined order, the predetermined order including at least one of:

When the configured bypass authorization is acquired, acquiring an index corresponding to the configured bypass authorization; after determining that the HARQ-ACK information bits of the K configured bypass grants need to be added, arranging the HARQ-ACK information bits of each configured bypass grant according to indexes corresponding to the K configured bypass grants in an ascending order or an descending order of the indexes; wherein K is a positive integer;

after determining that the HARQ-ACK information bits of the K configured bypass grants need to be added, arranging the HARQ-ACK information bits of each configured bypass grant correspondingly according to the resource positions of the bypass transmissions scheduled by the K configured bypass grants;

After determining that the HARQ-ACK information bits of the K configured bypass grants need to be added, arranging the HARQ-ACK information bits of each configured bypass grant accordingly according to the types of the K configured bypass grants.

Optionally, acquiring a configuration of a PUCCH candidate resource set for reporting downlink and/or bypassed HARQ-ACK information, and determining how to generate the HARQ-ACK codebook based on the configuration of the PUCCH candidate resource set, including any one of the following:

When the PUCCH candidate resource set corresponding to the downlink HARQ-ACK report and the PUCCH candidate resource set corresponding to the bypass HARQ-ACK report are respectively configured, respectively generating an independent HARQ-ACK codebook or respectively generating an independent subcodebook of the HARQ-ACK codebook for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission; when the PUCCH candidate resource set corresponding to the downlink HARQ-ACK report and the PUCCH candidate resource set corresponding to the bypass HARQ-ACK report are configured together, the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission are assumed to be multiplexed in the same HARQ-ACK codebook or multiplexed in the same subcodebook of the HARQ-ACK codebook;

Or when the PUCCH candidate resource set corresponding to the downlink HARQ-ACK report and the PUCCH candidate resource set corresponding to the bypass HARQ-ACK report are respectively configured or not, and the PUCCH candidate set comprises the same PUCCH candidate resource, respectively generating an independent HARQ-ACK codebook or respectively generating an independent subcodebook of the HARQ-ACK codebook for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission;

or whether the PUCCH candidate resource set corresponding to the downlink HARQ-ACK report and the PUCCH candidate resource set corresponding to the bypass HARQ-ACK report are respectively configured, and the bypass transmission and the HARQ-ACK information of the downlink transmission are multiplexed in the same codebook or independent codebooks are generated.

In a second aspect, a codebook-based feedback method is provided, applied to a third UE, including:

receiving bypass transmission sent by fourth UE;

generating a second HARQ-ACK codebook comprising HARQ-ACK feedback information corresponding to bypass transmission, wherein the second HARQ-ACK codebook comprises at least one of a second HARQ-ACK dynamic codebook and a second HARQ-ACK semi-static codebook;

And transmitting the second HARQ-ACK codebook to the fourth UE.

Optionally, generating the second HARQ-ACK semi-static codebook includes:

determining a physical bypass feedback channel PSFCH resource carrying bypass HARQ-ACK feedback information;

Determining a candidate bypass receiving opportunity set according to PSFCH resources;

And placing the generated HARQ-ACK information bits in sequence for generating a second HARQ-ACK semi-static codebook.

Optionally, determining the set of candidate bypass reception opportunities according to PSFCH resources includes:

Determining at least one of a time domain resource range, a frequency domain resource range and a code domain resource range comprising candidate bypass receiving opportunities according to the BWP and/or the resource pool where PSFCH resources are located;

And determining candidate bypass receiving opportunities in each time slot in the time domain resource range, wherein a candidate bypass receiving opportunity set consists of candidate bypass receiving opportunities in all time slots in the time domain resource range.

Optionally, in generating the second HARQ-ACK semi-static codebook, the set of time slot timings f associated with the BWP and/or the resource pool, which characterize the range of time domain resources, is configured at a higher level, where the higher level configuration includes a direct configuration and an indirect configuration, where the indirect configuration includes determining f according to PSFCH resource configurations, where f is a real number.

Optionally, determining candidate bypass reception opportunities in each slot includes:

The number of bypass resources that may be used for bypass transmission and the number of candidate bypass reception opportunities that exist in one slot are determined based on at least one of the time domain granularity, the frequency domain granularity, the code domain granularity, and the total size of the resources used for bypass transmission indicated in the configuration of the resources used for bypass transmission.

Optionally, generating a second HARQ-ACK dynamic codebook including HARQ-ACK feedback information corresponding to the bypass transmission includes:

Determining PSFCH resources carrying bypass HARQ-ACK feedback information;

Determining an accumulated downlink allocation index C-DAI and/or a total downlink allocation index T-DAI corresponding to the bypass HARQ-ACK feedback information according to PSFCH resources;

Generating HARQ-ACK information bits corresponding to the bypass HARQ-ACK feedback information;

and generating a second HARQ-ACK dynamic codebook according to at least one of the C-DAI and the T-DAI and the HARQ-ACK information bit.

Optionally, generating a second HARQ-ACK dynamic codebook according to at least one of the following information, including:

The identity of the UE indicating the C-DAI and/or T-DAI, the TB/CBG level HARQ-ACK feedback, CBG configuration, unicast, multicast, broadcast, parameters characterizing traffic priority, the identity of the UE comprising at least one of a UE identity ID, a UE source ID, a group ID of the group in which the UE is located, an ID of the UE within the group, an ID index of the UE within the group, the C-DAI and/or T-DAI being indicated in the SCI by the second UE.

Optionally, dynamically determining to enable or disable a second HARQ-ACK dynamic codebook for feedback of bypass multicast traffic on a bypass channel and/or on an uplink channel, comprising at least one of;

When the frequency domain size of a channel carrying feedback of the bypass multicast service is larger than a preset threshold value, determining to start a second HARQ-ACK dynamic codebook for feedback;

And determining to disable the second HARQ-ACK dynamic codebook for feedback when the frequency domain size of a channel carrying feedback of the bypass multicast service is not greater than a preset threshold.

In a third aspect, there is provided a first UE comprising:

The first processing module is used for sending bypass transmission to the second UE;

The second processing module is used for receiving the HARQ-ACK feedback information sent by the second UE;

The third processing module is used for generating second HARQ-ACK feedback information corresponding to bypass transmission according to the received first HARQ-ACK feedback information;

A fourth processing module, configured to generate a first HARQ-ACK codebook including second HARQ-ACK feedback information;

And the fifth processing module is used for reporting the first HARQ-ACK codebook to the base station.

In a fourth aspect, a third UE is provided, comprising:

A sixth processing module, configured to receive a bypass transmission sent by the fourth UE;

A seventh processing module, configured to generate a second HARQ-ACK codebook including HARQ-ACK feedback information corresponding to the bypass transmission, where the second HARQ-ACK codebook includes at least one of a second HARQ-ACK dynamic codebook and a second HARQ-ACK semi-static codebook;

and the eighth processing module is used for sending the second HARQ-ACK codebook to the fourth UE.

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

Sending a bypass transmission to the second UE; receiving HARQ-ACK feedback information sent by a second UE; generating second HARQ-ACK feedback information corresponding to bypass transmission according to the received first HARQ-ACK feedback information; generating a first HARQ-ACK codebook including second HARQ-ACK feedback information; and reporting the first HARQ-ACK codebook to the base station. Therefore, the second HARQ-ACK feedback information corresponding to the bypass transmission is reported together or independently.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments of the present application will be briefly described below.

Fig. 1 is a schematic flow chart of a feedback method based on a codebook according to an embodiment of the present application;

Fig. 2 is a schematic flow chart of another feedback method based on a codebook according to an embodiment of the present application;

FIG. 3 is a schematic diagram of codebook-based feedback according to an embodiment of the present application;

FIG. 4 is a schematic diagram of another codebook-based feedback provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of another codebook-based feedback provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of yet another codebook-based feedback provided by an embodiment of the present application;

fig. 7 is a schematic structural diagram of a first UE according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a third UE according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

In the present application, the sequence number of a message is only used to indicate different messages (e.g., a first message, a second message, etc. are used to represent different messages), and does not represent the order in which the messages are executed; the sequence numbers of the nodes are only used for indicating different nodes (such as the first node, the second node, etc. are used for representing different nodes), and are not used for representing the order of the nodes in the information interaction flow.

In the present application, the message names are merely examples, and the use of other names is not excluded.

In order to better understand and illustrate the solution of the embodiments of the present application, some technologies related to the embodiments of the present application are briefly described below.

The physical bypass control channel PSCCH in the embodiment of the present application may also be a physical downlink control channel (Physical Downlink Control Channel, PDCCH), EPDCCH (ENHANCED PHYSICAL Downlink Control Channel ), MPDCCH (MTC PHYSICAL Downlink Control Channel, MTC physical downlink control channel), NPDCCH (Narrowband Physical Downlink Control Channel ), NR-PDCCH (New Radio Physical Downlink Control Channel, new air interface physical downlink control channel); the physical bypass shared channel PSSCH may also be a physical Downlink shared channel (Physical Downlink SHARED CHANNEL, PDSCH), EPDSCH (ENHANCEDPHYSICAL DOWNLINK SHARED CHANNEL ), MPDSCH (MTC PHYSICAL Downlink SHARED CHANNEL, MTC physical Downlink shared channel), NPDSCH (Narrowband Physical Downlink SHARED CHANNEL ), NR-PDSCH (New Radio Physical Downlink SHARED CHANNEL, new air interface physical Downlink shared channel); the physical uplink control channel (Physical Uplink Control Channel, PUCCH) may also be other channels dedicated to carrying specific uplink control messages or specific bypass control information.

Alternatively, the time slots in the following embodiments may be subframes or time slots in a physical sense or subframes or time slots in a logical sense. Specifically, a subframe or a slot in a logical sense is a subframe or a slot corresponding to a resource pool of bypass communication. For example, in a V2X system, the resource pool is defined by a repeating bitmap that maps to a particular set of slots, which may be all slots, or all other slots except for some particular slots (e.g., slots in which MIB/SIBs are transmitted). The time slot indicated as '1' in the bit map can be used for V2X transmission, and belongs to the time slot corresponding to the V2X resource pool; the time slot indicated as "0" is not available for V2X transmission and does not belong to the time slot corresponding to the V2X resource pool.

The distinction of subframes or slots in the physical or logical sense is described below by a typical application scenario: when calculating the time-domain interval (gap) between two specific channels/messages (e.g. PSSCH carrying bypass data and PSFCH carrying corresponding feedback information), it is assumed that the interval is N slots, which in time domain correspond to an absolute time length of N x milliseconds if a subframe or slot in physical sense is calculated, x being the time length of the physical slot (subframe) under numerology of the scenario; otherwise, if a subframe or a slot in the logical sense is calculated, taking the bypass resource pool defined by the bitmap as an example, the interval of the N slots corresponds to N slots indicated as "1" in the bitmap, and the absolute time length of the interval varies according to the specific configuration situation of the bypass communication resource pool, and does not have a fixed value.

Alternatively, the time slot in the following embodiments may be a complete time slot, or may be a plurality of symbols corresponding to bypass communication in one time slot. For example, when bypass communication is configured to take place on the X1-X2 th symbol of each slot, the slots in the following embodiments are the X1-X2 th symbols in the slots in this scenario; or when the bypass communication is configured as mini-slot (mini-slot) transmission, the slots in the following embodiments are mini-slots defined or configured in the bypass system, rather than slots in the NR system.

Optionally, in the following embodiment, the information configured by the base station, indicated by signaling, configured by a higher layer, and preconfigured includes a set of configuration information; the UE selects one set of configuration information for use according to a predefined condition; also included is a set of configuration information comprising a plurality of subsets from which the UE selects one subset for use according to predefined conditions.

Some of the technical solutions provided in the following embodiments are specifically described based on the V2X system, but the application scenario should not be limited to the V2X system in bypass communication, but may also be applied to other bypass transmission systems. For example, the V2X subchannel-based designs in the following embodiments may also be used for D2D subchannels or other bypass transmission subchannels. The V2X resource pool in the following embodiments may also be replaced with a D2D resource pool in other bypass transmission systems, such as D2D. The data channel PSSCH within the V2X system in the following embodiments may also be replaced with a D2D data channel in other bypass transmission systems, such as D2D.

In the following embodiments, when the bypass communication system is a V2X system, the terminal or UE may be various types of terminals or UEs such as a Vehicle, an Infrastructure, a pedestrian PEDESTRIAN, and the like.

The bypass transmissions in the following embodiments include at least one of the following: transmission of a bypass data channel carrying bypass data, transmission of a bypass control channel carrying bypass control information SCI associated with the bypass data, transmission of a bypass feedback channel carrying feedback information corresponding to the bypass data.

The bypass communication in NR V2X includes two types of bypass communication based on blind retransmission and bypass communication based on HARQ. In the bypass communication based on the blind retransmission, the receiving end UE does not provide HARQ-ACK feedback information, and the transmitting end UE repeatedly transmits the bypass transport block N times, where N is a predefined or configured value, so that the number of transmissions per transport block is fixed and does not change according to feedback information provided by the receiving end. In the bypass communication based on HARQ, the receiving end UE needs to send HARQ-ACK feedback information, and the sending end determines whether the bypass transmission block needs to be retransmitted according to whether ACK feedback is received or whether NACK feedback is received after sending the bypass transmission block.

In NR V2X Mode 1, the resources used for the bypass transmission are scheduled by the base station (gNB) to the UE at the transmitting end of the bypass data. The signaling sent by the base station to the UE to indicate scheduling information for bypass transmission is referred to as bypass grant. In the prior art, the bypass grant includes a dynamic bypass grant and a configured bypass grant, which dynamically and semi-statically indicates bypass scheduling information, respectively. The configured bypass grant further includes two types, type-1 and Type-2, carried by the PDCCH and PDSCH, respectively. For Mode 1 bypass transmission based on the HARQ-ACK feedback mechanism, if the resources of the first transmission and retransmission of the bypass data are both scheduled by the base station, the UE needs to trigger the base station to schedule retransmission resources. This is because whether the bypass data needs retransmission is determined based on the HARQ-ACK feedback information of the bypass transmission acquired by the transmitting UE, not predetermined by the base station. In the prior art, the UE may report HARQ-ACK feedback information corresponding to the bypass data to the base station, where the information may be used to trigger the base station to schedule retransmission resources.

The feedback information of the HARQ-ACK information fed back to the bypass sending end UE by the bypass receiving end UE and the HARQ-ACK information reported to the base station by the bypass sending end UE are used for indicating whether the transmission of bypass data is successful or not, but the content is not necessarily identical, and the feedback information is transmitted on a bypass channel and an uplink channel respectively.

In the NR system, the codebook for HARQ-ACK includes two types of semi-static codebook and dynamic codebook. The semi-static codebook is also called as a Type-1 codebook in the prior art, and refers to a HARQ-ACK codebook generation mode in which the size of the HARQ-ACK codebook does not dynamically change with the actual data scheduling situation, and the codebook size is determined according to a predefined or RRC configured parameter. The dynamic codebook refers to a codebook generation mode in which the size of the HARQ-ACK codebook can be dynamically changed along with the actual data scheduling situation, and the codebook is generated based on a DAI domain in DCI. Both types of codebooks may be used for transmission of HARQ-ACK feedback for the bypass data, and the UE determines which type of codebook to use based on higher layer signaling configuration and/or physical layer signaling configuration.

In an NR system, a UE determines a set of all downlink data transmissions requiring HARQ-based feedback according to activated downlink BWP and uplink BWP in each service cell corresponding to a designated HARQ-based feedback time unit; the set includes DCI scheduled or SPS PDSCH transmissions and PSCCH transmissions for SPS PDSCH release, collectively referred to as candidate PDSCH reception opportunities. And the UE generates HARQ-based information bits for each candidate PDSCH receiving opportunity in each cell according to the set of the candidate PDSCH receiving opportunities of each cell, the number of the cells configured by RRC and other parameters related to HARQ, and combines all the HARQ-ACK information bits to determine the HARQ-ACK semi-static codebook.

In the NR system, the UE generates a dynamic codebook according to a downlink allocation index (Downlink Assignment Index, DAI) field indicated by the base station in downlink control information (Downlink Control Information, DCI). The DAIs indicated in the DCI include a cumulative DAI (Count DAI, C-DAI) and a Total DAI (Total DAI, T-DAI), representing the cumulative number of PDSCH receptions or SPS releases scheduled by the DCI up to the current serving cell and the current PDCCH detection occasion, and the Total number of PDSCH or SPS releases scheduled by the DCI up to the current PDCCH detection occasion, respectively. If the serving cell turns on Code Block Group (CBG) feedback, the UE generates two HARQ-ACK sub-codebooks for Transport Block (TB) level feedback and CBG level feedback, respectively, and places the two sub-codebooks in order to generate the final HARQ-ACK dynamic codebook. Wherein the C-DAI values and T-DAI values within each subcodebook are counted separately.

Example 1

The embodiment of the application provides a feedback method based on a codebook, which is applied to first User Equipment (UE), wherein a flow diagram of the method is shown in figure 1, and the method comprises the following steps:

Step S101, sending a bypass transmission to the second UE.

Step S102, receiving HARQ-ACK feedback information sent by the second UE.

Step S103, generating second HARQ-ACK feedback information corresponding to bypass transmission according to the received first HARQ-ACK feedback information.

Step S104, a first HARQ-ACK codebook including second HARQ-ACK feedback information is generated.

Step S105, the first HARQ-ACK codebook is reported to the base station.

In the embodiment of the application, bypass transmission is sent to the second UE; receiving HARQ-ACK feedback information sent by a second UE; generating second HARQ-ACK feedback information corresponding to bypass transmission according to the received first HARQ-ACK feedback information; generating a first HARQ-ACK codebook including second HARQ-ACK feedback information; reporting the first HARQ-ACK codebook to a base station; therefore, the second HARQ-ACK feedback information corresponding to the bypass transmission is reported together or independently.

Optionally, sending a bypass transmission request to the base station;

receiving bypass authorization sent by a base station;

according to the scheduling information carried in the bypass authorization, sending bypass transmission to the second UE;

receiving HARQ-ACK feedback information sent by a second UE;

Generating a first HARQ-ACK codebook comprising second HARQ-ACK feedback information, wherein the first HARQ-ACK codebook comprises at least one of a first HARQ-ACK dynamic codebook and a first HARQ-ACK semi-static codebook;

And reporting the first HARQ-ACK codebook to the base station.

the bypass transmission includes at least one of:

Further, if it is determined that at least one or one of the bypass transmissions enables CBG transmission, generating a first HARQ-ACK dynamic codebook corresponding to the bypass transmission includes generating the first HARQ-ACK dynamic sub-codebook and the second HARQ-ACK dynamic sub-codebook. Otherwise, if it is determined that any one or any one of the bypass transmissions does not enable CBG transmission, generating a first HARQ-ACK dynamic codebook corresponding to the bypass transmission includes generating the first HARQ-ACK dynamic sub-codebook and does not include generating the second HARQ-ACK dynamic sub-codebook; or the method comprises the steps of generating the first HARQ-ACK dynamic sub-codebook and the second HARQ-ACK dynamic sub-codebook, wherein the content of the second HARQ-ACK dynamic sub-codebook is null and/or the length of the second HARQ-ACK dynamic sub-codebook is 0 bit.

Optionally, the C-DAI and the T-DAI corresponding to the first HARQ-ACK dynamic sub-codebook and the second HARQ-ACK dynamic sub-codebook are counted separately, and in the first HARQ-ACK dynamic sub-codebook and the second HARQ-ACK dynamic sub-codebook, the C-DAI and/or the T-DAI corresponding to the bypass transmission and the downlink transmission are jointly counted. The joint count indicates that the bypass transmission and the downlink transmission are multiplexed in the same HARQ-ACK dynamic codebook.

Bypass grants in the bypass communication system include dynamic grants and configured grants, the configured grants further including grants for class 1 and class 2 configurations. Dynamic grant is indicated by DCI; the grant of a class 1 configuration is indicated only by RRC signaling; the grant of a class 2 configuration is indicated by RRC signaling and DCI, but DCI signaling is only acquired once from the base station when the grant of the class 2 configuration is activated. Therefore, the transmission of the configured grant corresponding bypass HARQ feedback information is not suitable to be dynamically scheduled.

Optionally, generating a dynamic codebook including dynamic grant corresponding bypass HARQ feedback information and configured grant corresponding bypass HARQ feedback information using at least one of the following methods:

The C-DAI and/or the T-DAI corresponding to the first HARQ-ACK dynamic sub-codebook and/or the second HARQ-ACK dynamic sub-codebook are C-DAI and/or T-DAI indicated in dynamic grant signaling in bypass grant; correspondingly, the codebook generated according to the C-DAI and/or the T-DAI comprises HARQ-ACK information bits corresponding to the bypass transmission scheduled by the dynamic bypass grant, namely second HARQ-ACK feedback information of the bypass transmission scheduled by the dynamic bypass grant;

Generating a first HARQ-ACK dynamic codebook comprising adding second HARQ-ACK feedback information for the configured authorized scheduled bypass transmission at the tail of a codebook generated from the C-DAI and/or T-DAI; or after the first HARQ-ACK dynamic codebook is generated according to other steps, additionally adding second HARQ-ACK feedback information of the configured authorized scheduled bypass transmission at the tail of the first HARQ-ACK dynamic codebook.

Optionally, when Q configured bypass grants in total are obtained, adding second HARQ-ACK feedback information of bypass transmission scheduled by all Q configured bypass grants at the tail of the first HARQ-ACK dynamic codebook, where Q is a positive integer. Optionally, the bypass grant of the configuration specifically includes a grant of a class 1 configuration and/or a grant of a class 2 configuration. If the configured bypass grant includes only a class 1 configured grant, then calculating the value of Q, the class 2 configured grant is not counted in; and vice versa.

Optionally, if there is an unactivated bypass grant in the Q configured bypass grants, the second HARQ-ACK feedback information corresponding to the unactivated bypass grant is set to a predetermined state, for example, NACK (or ACK).

This method is a method for letting the first HARQ-ACK dynamic codebook include information bits of the grant feedback information of all configurations activated and not activated, and has the advantage of being of a fixed size rather than varying based on the activation state of the grant of the configuration, with low complexity.

Optionally, when P configured bypass grants are activated and the bypass transmission scheduled by the configured bypass grants meets a preset condition, adding second HARQ-ACK feedback information of the bypass transmission scheduled by the activated P configured bypass grants at the tail of the first HARQ-ACK dynamic codebook and/or the tail of the dynamic codebook including the bypass HARQ-ACK feedback information corresponding to the dynamic bypass grants, where P is a positive integer. Optionally, the bypass grant of the configuration specifically includes a grant of a class 2 configuration, i.e. when calculating the value of P, the grant of a class 1 configuration is not counted.

This method is a method for letting the first HARQ-ACK dynamic codebook only include information bits of the grant of the activated configuration, and has the advantage that removing the information bits corresponding to the grant of the non-activated configuration may reduce overhead (overhead), which has the disadvantage that the complexity is relatively high.

Optionally, adding the HARQ-ACK information bits of the corresponding configured bypass grant includes adding the HARQ-ACK information bits of the configured bypass grant in a predetermined order. The predetermined sequence includes at least one of:

When acquiring the configured bypass grants, acquiring an index (index) corresponding to each or at least one configured bypass grant; after determining that the HARQ-ACK information bits of K configured bypass grants are required to be added in a first HARQ-ACK dynamic codebook (including in a sub-codebook contained in the first HARQ-ACK dynamic codebook), correspondingly arranging the HARQ-ACK information bits of each configured bypass grant according to indexes corresponding to the K configured bypass grants in an ascending order of indexes (or in a descending order of indexes); wherein, the index can be part of the configuration information of the configured bypass authorization or is determined by deduction according to the configuration information of the configured bypass authorization; k is a positive integer.

After determining that the HARQ-ACK information bits of K configured bypass grants are required to be added in a first HARQ-ACK dynamic codebook (comprising the sub-codebook contained in the first HARQ-ACK dynamic codebook), arranging the HARQ-ACK information bits of each configured bypass grant correspondingly according to the resource positions of bypass transmission scheduled by the K configured bypass grants; wherein, according to the resource position arrangement, further comprises the steps of firstly arranging the time domain resource positions from the morning to the evening and then arranging the frequency domain resource positions from the low to the high; the resource position of the bypass transmission is a resource position meeting a preset condition in the configured bypass resources of the bypass authorization scheduling, and if the resource position comprises a plurality of positions, the resource position is the first position or the last position or a specific position/positions in the plurality of positions;

After determining that the HARQ-ACK information bits of K configured bypass grants are required to be added in a first HARQ-ACK dynamic codebook (comprising the sub-codebook contained in the first HARQ-ACK dynamic codebook), sequencing according to the bypass grants with the type of the K configured bypass grants being a class 1 or class 2 configuration; for example, the HARQ-ACK information bits corresponding to the grants of the class 1 configuration are added first, and then the HARQ-ACK information bits corresponding to the grants of the class 2 configuration are added.

In a specific example, the UE obtains a total of q=q1+q2 configuration grants, including Q1 class 1 configuration grants and Q2 class 2 configuration grants, where the class 1 configuration grants have indices {1,2, … Q1} respectively, and P of the class 2 configuration grants are activated, and the corresponding indices { q2_1, q2_2, … q2_p } respectively. The UE determines that the HARQ-ACK information bits corresponding to the Q1 type 1 configuration grants and the P type 2 configuration grants are required to be added in the first HARQ-ACK dynamic codebook. The UE sorts the Q1 class 1 configuration grants according to the indexes, sorts the Q1 class 1 configuration grants according to the P class 2 configuration grants, sorts the P class 2 configuration grants according to the sequence of the first class 1 configuration grants and the second class 2 configuration grants, and correspondingly places HARQ-ACK information bits corresponding to the sorted configuration grants. For example, assuming that each configured grant corresponds to 1 HARQ-ACK information bit, the UE may generate a total of q1+p HARQ-ACK information bits, the first Q1 HARQ-ACKs sequentially correspond to grants of class 1 configuration with index 1,2, … Q1, the last P bits sequentially correspond to grants of class 2 configuration with index q2_1, q2_2, … q2_p, and q2_1< q2_2< … < q2_p.

In another specific example, the UE acquires a total of 4 configured grants { CG1, CG2, CG3, CG4}, whose scheduled bypass transmissions have resource locations in { time slot t1, subchannel s1}, { time slot t2, subchannel s2}, { time slot t3, subchannel s3}, { time slot t4, subchannel s4}, respectively. The UE sorts the time slots t 1-t 4 according to the sequence from the early to the late of the time domain resource positions, and then sorts the corresponding sub-channels according to the sequence from the low to the high of the frequency domain resource positions if more than one resource positions are in the same time slot. For example, assuming that t1< t2=t3 < t4, and s2> s3, the result of the ordering is { CG1, CG3, CG2, CG4}. And the UE sequentially adds the HARQ-ACK information bits of { CG1, CG3, CG2 and CG4} according to the sequencing result.

In the above example, HARQ-ACK information bits corresponding to SPS PDSCH or configured bypass grant are added at the end of the codebook/sub-codebook; similarly, the method may also be modified to add the information bits at the start of the codebook/sub-codebook. The base station may calculate a number of HARQ-ACK information bits corresponding to SPS PDSCH and/or configured bypass grant from the end and assume that the other part is a dynamic codebook generated based on DAI; similarly, several HARQ-ACK information bits corresponding to SPS PDSCH and/or configured bypass grant may also be calculated starting from the beginning and assuming the other part is a dynamic codebook generated based on DAI. The specific location of the HARQ-ACK information bits corresponding to the addition of SPS PDSCH or configured bypass grant does not affect the effectiveness and feasibility of the above method.

Optionally, when the P configured bypass grants are activated and the bypass transmission of the configured bypass grant schedule meets a preset condition, K bits of second HARQ-ACK feedback information of the corresponding configured bypass grant is added at the tail of the first HARQ-ACK dynamic codebook and/or the tail of the dynamic codebook including the bypass HARQ-ACK feedback information corresponding to the dynamic bypass grant, and P, K is a positive integer.

Optionally, meeting the preset condition includes: the time domain position and/or the frequency domain position of the bypass resource scheduled by the bypass grant of a certain configuration are within a specific time window and/or a specific frequency domain range, and the specific time window and/or the specific frequency domain range are determined according to the uplink resource used for reporting the bypass HARQ-ACK information. For example, the particular time window and/or frequency domain range is determined from the uplink resources carrying the first HARQ-ACK dynamic codebook.

Optionally, the method of determining the K bits includes at least one of:

If P is less than or equal to K, and/or if the number of bits of the second HARQ-ACK feedback information corresponding to the P configured bypass grants is less than or equal to K, the K bits include the second HARQ-ACK feedback information corresponding to the P configured bypass grants; optionally, mapping the second HARQ-ACK feedback information corresponding to the P configured bypass grants to the K bit positions according to a predetermined order, and if a bit position of the second HARQ-ACK feedback information without the corresponding configured bypass grant is included in the K bit positions, setting a value in the bit position to a predetermined value; wherein the predetermined order may be determined according to an index (index) of the configured bypass grant;

If P is greater than K, and/or if the number of bits of the second HARQ-ACK feedback information corresponding to the P configured bypass grants is greater than K, the K bits include the second HARQ-ACK feedback information corresponding to the P 'configured bypass grants, the P' configured bypass grants being determined from at least one of the P configured bypass grants being activated:

Priority of service; for example, selecting the bypass grant of P' configurations with highest service priority among the bypass grants of P configurations; or selecting P' configured bypass grants with highest service priority and the sum of the bit numbers of the corresponding second HARQ-ACK feedback information not greater than K from the P configured bypass grants;

The position of the scheduled bypass resource in the configured bypass grant; for example, selecting P' configured bypass grants with the latest scheduled bypass resource among the P configured bypass grants before reporting the uplink resource position of the bypass HARQ-ACK information; for example, the UE reports the bypass HARQ-ACK information to the base station on the PUCCH resource in the slot n, where the reported information includes HARQ-ACK information corresponding to configured bypass grants in which bypass transmissions are scheduled in the range of the slot n-a, n-b, the configured bypass grants total p=3, the scheduled bypass transmissions are in the slots n-P1, n-P2, n-P3, and P1> P2> P3, respectively; the UE reports HARQ-ACK information corresponding to P' =2 configured bypass grants, and selects the latest 2 configured bypass grants of the scheduled bypass resources in the P=3 configured bypass grants before a time slot n, namely 2 configured bypass grants of scheduled bypass transmission in time slots n-P2 and n-P3 respectively;

Index of configured bypass grants; for example, selecting the lowest indexed P' of the P configured bypass grants;

p' =p, i.e. the bypass grants for all P configurations are selected.

For the above method, optionally, each bypass grant corresponds to 1-bit HARQ-ACK feedback information, and P' =k. This case further includes 1 HARQ process per bypass grant or more than one HARQ process per bypass grant. If each bypass grant corresponds to a plurality of HARQ processes, each bypass grant generates corresponding 1-bit HARQ-ACK feedback information in a manner of using HARQ bundling.

For the above method, optionally, multiple bypass grants share the same HARQ-ACK bit. For example, the P 'configured bypass grants generate 1-bit HARQ-ACK feedback information (P' > 1). For example, P' configured bypass grants generate K bits of HARQ-ACK feedback information, where P1 configured bypass grants correspond to bit 1 in the HARQ-ACK feedback information, P2 configured bypass grants correspond to bit 2 in the HARQ-ACK feedback information, and so on. Wherein the value of P 'and/or the mapping relation of what bit of the K bits each of the P' configured bypass grants should be mapped to may be (pre) configured, or (pre) defined, or determined according to a predetermined criterion.

When reporting the bypass HARQ-ACK information to the base station or feeding the bypass HARQ-ACK information back to the transmitting end UE of the bypass transmission, there are the following possible cases according to the mapping relationship between the configured bypass grant and the HARQ-ACK bits: the 1 configured bypass grant corresponds to 1-bit HARQ-ACK information; more than 1 configured bypass grants correspond to 1-bit HARQ-ACK information; the 1 configured bypass grant corresponds to more than 1 bit of HARQ-ACK information. For the mapping relationship between the configured bypass grant and the HARQ-ACK bits when reporting the bypass HARQ-ACK information to the base station, a specific example is that the bypass HARQ-ACK information is reported to the base station in the form of a dynamic HARQ-ACK codebook, and the dynamic HARQ-ACK codebook indicates HARQ-ACK information of P 'configured bypass grants in total, and K bits at the end of the dynamic HARQ-ACK codebook are used for the HARQ-ACK information of P' configured bypass grants in total.

Optionally, when more than one configured bypass grant corresponds to 1-bit HARQ-ACK information, transmitting a bypass transmission and/or generating the 1-bit HARQ-ACK information using at least one of the following methods:

The more than one configured bypass grant corresponds to the same HARQ process, HARQ-ACK information is generated according to a traditional method for generating HARQ-ACK information bits for 1 HARQ process, and the generated 1-bit HARQ-ACK information is the HARQ-ACK state corresponding to the latest time in the transmission of the more than one configured bypass grant schedule;

the bypass grant with more than one configuration corresponds to more than one HARQ process, the mutually independent TB is transmitted in the more than one HARQ process, and 1-bit HARQ-ACK information is generated by adopting a HARQ bundling mode; specifically, if any one of the configured bypass grants corresponds to NACK information, 1-bit NACK information is generated, otherwise if all the configured bypass grants correspond to ACK information, 1-bit ACK information is generated;

The more than one configured bypass grant corresponds to more than one HARQ process in which the same TB is transmitted; if any one of the configured bypass grants corresponds to the ACK information, indicating that the TB is successfully transmitted on the bypass resource scheduled by at least one of the configured bypass grants, generating 1-bit ACK information, otherwise, if all the configured bypass grants correspond to NACK information, generating 1-bit NACK information;

The more than one configured bypass grant corresponds to more than one HARQ process, but since there is only one reporting opportunity, it is treated as being identical to one HARQ process, i.e. the same TB is transmitted in the more than one HARQ process until the TB is successfully transmitted, and then the same next TB is transmitted in the more than one HARQ process until the next TB is successfully transmitted; and generating HARQ-ACK information according to a conventional method of generating HARQ-ACK information bits for 1 HARQ process, the generated 1-bit HARQ-ACK information being a HARQ-ACK state corresponding to a time of the latest one of the transmissions of the more than one configured bypass grant schedule.

For the above more than one configured bypass grant corresponds to 1-bit HARQ-ACK information, a specific example is that the sending UE of the bypass service reports the bypass HARQ-ACK information to the base station in the time slot n through the PUCCH, where the bypass HARQ-ACK information is reported in the form of a dynamic codebook, and the dynamic codebook includes k=1 bits for indicating the HARQ-ACK information of the bypass grant of the specific configuration. Where the bypass grant for this particular configuration is a bypass grant that is activated and schedules the configuration of bypass resources within a time window [ n-a, n-b ], P 'in total and P' being a real number greater than 1 (P '=1 or P' =0 may also be present in other examples). a and b are real numbers of (pre) definitions or (pre) configurations.

In a specific example, the sending UE of the bypass service reports the bypass HARQ-ACK information to the base station through the PUCCH in the time slot n, where the bypass HARQ-ACK information is reported in the form of a dynamic codebook, and the dynamic codebook includes 1 bit of HARQ-ACK information for indicating the bypass grant of the specific configuration. Wherein the specifically configured bypass grant comprises a configured bypass grant that the scheduled bypass transmission is located within the time window [ n-a, n-b ], a and/or b being a higher layer (pre) configured or (pre) defined. Depending on the specific state of the specific configured bypass grant, the transmitting UE may generate 1-bit HARQ-ACK information indicating the specific configured bypass grant based on at least one of the following methods:

If the specific configured bypass grant includes 1 configured bypass grant, the 1 bit indicates HARQ-ACK information corresponding to the 1 configured bypass grant;

If the particular configured bypass grant includes one or more configured bypass grants and the one or more configured bypass grants correspond to a total of 1 HARQ process, the 1 bit indicates HARQ-ACK information corresponding to the 1 HARQ process; wherein the configured HARQ process corresponding to the bypass grant is (pre) configured by a higher layer or derived by the UE according to (pre) defined criteria;

If the particular configured bypass grant includes one or more configured bypass grants and the one or more configured bypass grants correspond to more than one HARQ process in total, generating the 1 bit using HARQ bundling; specifically, when the HARQ-ACK states of the more than one HARQ processes are all ACK, 1-bit ACK information is generated, otherwise 1-bit NACK information is generated; or when the HARQ-ACK states of the more than one HARQ processes are NACK, generating 1-bit NACK information, otherwise, generating 1-bit ACK information;

If the specific configured bypass grant includes a plurality of configured bypass grants and the plurality of configured bypass grants correspond to more than one HARQ process in total, selecting one from the plurality of configured bypass grants, and generating the 1 bit according to HARQ-ACK information corresponding to the selected configured bypass grant; optionally, selecting one of the plurality of configured bypass grants is based on at least one of: traffic priority, e.g. selecting a configured bypass grant with highest traffic priority (which may be traffic priority of bypass data sent on the scheduled bypass transmission); the time domain and/or frequency domain and/or code domain location of the resources of the bypass transmission scheduled by the configured bypass grant, e.g. selecting the configured bypass grant corresponding to the one of the bypass transmissions scheduled the latest in the time domain; a destination ID, e.g., a bypass grant selecting a configuration for the scheduled bypass transmission corresponding to a particular destination ID; geographic location, for example, selecting a bypass grant for which the communication distance corresponding to the scheduled bypass transmission is the smallest; the time delay, for example, selects the bypass grant with the lowest time delay budget corresponding to the scheduled bypass transmission;

if the specific configured bypass grant includes one or more configured bypass grants and the one or more configured bypass grants correspond to more than one HARQ process in total, selecting one from the more than one HARQ processes, and generating the 1 bit according to HARQ-ACK information corresponding to the selected HARQ process; optionally, the specific method of selecting one from the more than one HARQ processes is similar to the method of selecting one of a plurality of configured bypass grants;

If the particular configured bypass grant includes one or more configured bypass grants and the one or more configured bypass grants correspond to more than one HARQ process in total, then the more than one HARQ process is used as one HARQ process and not as multiple parallel HARQ processes; specifically, after the previous HARQ process transmits a specific TB, if the TB is transmitted successfully and/or the maximum number of retransmissions has been reached, the next HARQ process may send a new TB, otherwise the next HARQ process needs to retransmit the specific TB; the UE generates 1-bit HARQ-ACK information according to the HARQ state of the latest HARQ process; taking a specific scenario as an example, assume that the one or more configured bypass grants sequentially correspond to HARQ processes 1,2,3,4 in order according to the time domain resource position ordering of the scheduled bypass transmission, HARQ process 1 sends a certain transmission of TB1 and the transmission status is failed, HARQ process 2 sends a retransmission of TB1 and the transmission status is failed, HARQ process 3 sends a retransmission of TB1 and the transmission status is successful, HARQ process 4 sends a first transmission of TB2 and the transmission status is successful; the UE generates 1-bit ACK information according to the HARQ-ACK state of HARQ process 4.

Note that, in the above example, the HARQ-ACK information corresponding to the HARQ-ACK state of the HARQ process and the configured bypass grant is not completely identical to the HARQ-ACK information received by the HARQ process or the bypass transmission corresponding to the bypass grant on the bypass feedback channel PSFCH. For example, the UE transmits multicast data and using a method of transmitting only NACK without transmitting ACK, it is possible that no HARQ-ACK information is received on the bypass feedback channel, but the HARQ-ACK state at this time should be understood as ACK. The method for determining the HARQ-ACK state of the HARQ process and the HARQ-ACK information corresponding to the configured bypass grant may use any method for determining the content of the bypass HARQ-ACK information when reporting the bypass HARQ-ACK information to the base station in the prior art.

The main advantage of the above example is that if the base station saves uplink overhead and reduces the negative impact of half duplex on the UE monitoring the bypass resource pool, it may schedule less PUCCH resources for the UE, where the resources cannot meet that each configured bypass grant has a corresponding independent PUCCH resource, that is, it cannot meet that the UE cannot ensure that the PUCCH is associated with only one configured bypass grant when reporting the bypass HARQ-ACK information through the PUCCH each time. However, in the prior art, only 1 bit is used to indicate the configured bypass grant, and the UE does not report HARQ-ACK information of multiple configured bypass grants. Thus, in the above examples, a method is provided how to transmit and/or generate 1-bit HARQ-ACK information corresponding to a configured bypass grant in more than one configured bypass grant when one PUCCH resource is associated to the more than one configured bypass grant.

Determining PUCCH resources carrying second HARQ-ACK feedback information;

predetermined criteria, including at least one of:

If the PUCCH candidate resource set corresponding to the downlink HARQ-ACK report and the PUCCH candidate resource set corresponding to the bypass HARQ-ACK report are respectively configured, respectively generating an independent HARQ-ACK codebook or respectively generating an independent subcodebook of the HARQ-ACK codebook for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission; otherwise, if the set of PUCCH candidate resources corresponding to the downlink HARQ-ACK report and the set of PUCCH candidate resources corresponding to the bypass HARQ-ACK report are configured together, the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission are assumed to be multiplexed in the same HARQ-ACK codebook or in the same subcodebook of the HARQ-ACK codebook;

Or whether the PUCCH candidate resource set corresponding to the downlink HARQ-ACK report and the PUCCH candidate resource set corresponding to the bypass HARQ-ACK report are respectively configured or not, if the PUCCH candidate set comprises the same PUCCH candidate resource, respectively generating an independent HARQ-ACK codebook or respectively generating an independent subcodebook of the HARQ-ACK codebook for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission;

Or whether the PUCCH candidate resource set corresponding to the downlink HARQ-ACK report and the PUCCH candidate resource set corresponding to the bypass HARQ-ACK report are respectively configured, and the bypass transmission and the HARQ-ACK information of the downlink transmission are multiplexed in the same codebook or independent codebooks are generated, so that the PUCCH candidate resource set and the PUCCH candidate resource set are mutually independent, and a preset association relation does not exist.

Optionally, if an independent HARQ-ACK codebook is generated for the second HARQ-ACK feedback information corresponding to the bypass transmission and the third HARQ-ACK feedback information corresponding to the downlink transmission, respectively, and the PUCCH resource for reporting the second HARQ-ACK feedback information for the bypass transmission and the PUCCH resource for reporting the third HARQ-ACK feedback information for the downlink transmission acquired are coincident or at least coincident in time domain, one feedback information is transmitted according to the priority, and the transmission of the other feedback information is terminated.

The PUCCH candidate resource set is used for determining PUCCH resources carrying HARQ-ACK feedback information of bypass transmission and/or downlink transmission; further, the configuration of the PUCCH candidate resource set includes time domain positions and/or frequency domain positions of a plurality of PUCCH candidate resources and/or indexes of a plurality of PUCCH candidate resources, and the UE acquires indication information of PUCCH resources scheduled by the base station, where the indication information includes the time domain position and/or the frequency domain position and/or the indexes of at least one PUCCH candidate resource in the PUCCH candidate resource set.

Wherein the priority for determining whether to send the second HARQ-ACK feedback information for the bypass transmission or the third HARQ-ACK feedback information for the downlink transmission may be determined based on at least one of:

Priority between downlink transmission and bypass transmission;

the traffic priority of the bypass transmission is in particular determined by the quality of service QoS.

For example, the priority between the downstream and the bypass is that the bypass QoS [ R1, R2] is lower than eMBB the downstream is lower than the bypass QoS [ R3, R4] is lower than URLLC (Ultra-reliable and Low Latency Communications, ultra high reliability and low latency communication) downstream. When QoS of the bypass transmission is located in the interval of [ R3, R4], if the downlink transmission of the HARQ reporting conflict is URLLC downlink transmission, the UE sends HARQ-ACK information of the downlink transmission of URLLC; otherwise, if the downlink transmission conflicted with the HARQ reporting of the bypass transmission is the downlink transmission of eMBB, the HARQ-ACK information of the bypass transmission is sent. When the QoS of the bypass transmission is in the interval of [ R1, R2], if the downlink transmission of the HARQ reporting conflict is eMBB or URLLC, the UE sends the HARQ-ACK information of the downlink transmission. In other examples, the priority of the downlink, and the priority of the downlink and the priority of the bypass transmission may be further refined according to the service type or other parameters of the downlink.

The embodiment of the application provides another feedback method based on a codebook, which is applied to a third UE, wherein a flow diagram of the method is shown in fig. 2, and the method comprises the following steps:

step S201, receiving the bypass transmission sent by the fourth UE.

Step S202, a second HARQ-ACK codebook including HARQ-ACK feedback information corresponding to bypass transmission is generated, wherein the second HARQ-ACK codebook includes at least one of a second HARQ-ACK dynamic codebook and a second HARQ-ACK semi-static codebook.

Step S203, the second HARQ-ACK codebook is transmitted to the fourth UE.

In the embodiment of the application, the HARQ-ACK feedback information corresponding to the bypass transmission is reported together or independently.

Optionally, generating the second HARQ-ACK semi-static codebook includes:

Determining PSFCH resources carrying bypass HARQ-ACK feedback information;

The codebook-based feedback method according to the above embodiment of the present application is described in full detail by the following embodiments:

In a first aspect of the application, a HARQ-ACK dynamic codebook is used for HARQ-ACK feedback of corresponding bypass data on an uplink channel.

The first HARQ-ACK feedback in the first aspect is first HARQ-ACK feedback information, the second HARQ-ACK feedback is second HARQ-ACK feedback information, and the HARQ-ACK dynamic codebook is the first HARQ-ACK dynamic codebook.

In this embodiment, the transmitting UE (first UE) of the bypass data adopts Mode1 transmission, that is, bypass transmission scheduled by the base station. The UE requests bypass transmission to the base station, obtains bypass authorization for scheduling the bypass transmission sent by the base station, sends bypass data and/or bypass control information SCI according to scheduling information indicated in the bypass authorization, and receives HARQ-ACK feedback information provided by receiving end UE (second UE) of the bypass data; and then, the transmitting end UE reports HARQ-ACK feedback of the corresponding bypass data to the base station. For convenience of distinction, the HARQ-ACK feedback provided by the UE at the receiving end of the bypass data is referred to as a first HARQ-ACK feedback, and the HARQ-ACK feedback of the corresponding bypass data reported by the UE to the base station is referred to as a second HARQ-ACK feedback. The first/second is merely a designation and does not imply that there is any predetermined order in logic or time.

In this embodiment, the UE reports a second HARQ-ACK feedback to the base station, where the second HARQ-ACK feedback is transmitted on the uplink channel using the dynamic codebook of HARQ-ACKs. The bypass grant obtained by the UE indicates scheduling information of a specific bypass transmission, and also indicates C-DAI and/or T-DAI information corresponding to the bypass transmission. And the UE generates an HARQ-ACK dynamic codebook containing the second HARQ-ACK information according to the C-DAI and/or T-DAI information indicated in the bypass authorization, and reports the HARQ-ACK dynamic codebook to the base station.

Optionally, the dynamic codebook is carried as UCI on PUCCH; for example, the HARQ-ACK information bits included in UCI correspond to the dynamic codebook. Optionally, the dynamic codebook is carried on PUSCH.

The UE generates a HARQ-ACK dynamic codebook for corresponding bypass transmissions carried on PUCCH, comprising:

Determining PUCCH resources carrying second HARQ-ACK feedback information;

determining C-DAI and/or T-DAI corresponding to the second HARQ-ACK feedback information;

And generating an HARQ-ACK dynamic codebook corresponding to the second HARQ-ACK feedback information based on the C-DAI and/or the T-DAI and the HARQ-ACK information bits.

Optionally, if the UE is used as a sending end UE of the bypass data and/or the bypass control information SCI is sent, corresponding HARQ-ACK (second HARQ-ACK feedback) information bits are generated according to the received HARQ-ACK (first HARQ-ACK feedback) information fed back by the receiving end UE of the bypass data; the HARQ-ACK information bit is used for reporting to the base station, indicating whether the transmission of the bypass data is successful.

Alternatively, the failure to receive HARQ-ACK (first HARQ-ACK feedback) information fed back by the receiving end UE bypassing the data may be interpreted by the transmitting end UE as NACK or DTX, wherein DTX is a state dedicated to indicating that the transmitting end UE fails to receive HARQ-ACK feedback of the receiving end UE.

Optionally, HARQ-ACK (first HARQ-ACK feedback) information fed back by the receiving end UE of the bypass data corresponds to K Transport Blocks (TBs) of the bypass data sent by the sending end UE, where K is a positive integer. Optionally, the HARQ-ACK (second HARQ-ACK feedback) information reported by the sending end UE of the bypass data to the base station corresponds to K Transport Blocks (TBs) of the bypass data sent by the sending end UE, where K is a positive integer.

Optionally, the UE acts as a receiving end UE of the bypass data, and if the bypass data and/or the bypass control information SCI is received, the UE generates corresponding HARQ-ACK (second HARQ-ACK feedback) information bits; the HARQ-ACK information bit is used for reporting to the base station, indicating whether the transmission of the bypass data is successful.

In the prior art, the transmission of downlink data includes transmission based on Transport Blocks (TBs) and transmission based on Code Block Groups (CBGs) (referred to as CBG transmission in the present application). An example of CBG transmission is if the UE is provided with the RRC field PDSCH-CodeBlockGroupTransmission, UE of the serving cell to receive the physical downlink shared channel PDSCH scheduled by DCI format 1_1, which PDSCH includes CBGs of one TB. Similarly, the mechanism may also be used in bypass transmissions.

Optionally, the transmission of bypass data includes a TB-based transmission and a CBG-based transmission. If the UE is provided with the RRC field PSSCH-CodeBlockGroupTransmission, UE to receive the physical bypass shared channel PSSCH in the bypass transmission, the PSSCH includes CBGs of a TB of bypass data. Optionally, this field is resource pool specific, or traffic type (multicast/broadcast/unicast) specific, or transmission Mode (Mode 1/Mode 2) specific, or specific for some specific traffic priority (e.g. traffic priority characterization parameter QoS specific).

Optionally, for the HARQ-ACK information bits corresponding to the second HARQ-ACK feedback above, if CBG transmission is not turned on, the UE generates 1 HARQ-ACK information bit for each TB bypassing the service; otherwise, if CBG transmission is turned on, the UE generates N HARQ-ACK information bits for each TB bypassing traffic. Where N is the maximum number of CBGs contained in one TB, the UE obtains the value of N by at least one of: configuration or pre-configuration of the bypass CBG related, configuration or pre-configuration of the bypass resource pool.

Optionally, the UE determines, based on the configured or preconfigured or predefined information, whether at least one of the following bypass transmissions enables CBG transmission, and accordingly determines to generate TB-based second HARQ-ACK feedback information or CBG-based second HARQ-ACK feedback information for at least one of the following bypass transmissions: a bypass transmission in a serving cell, a bypass transmission in a bypass resource pool, a bypass transmission in a bypass transmission mode, a bypass transmission of a traffic type, a bypass transmission of a transmission type, a bypass transmission corresponding to a class of grants, a given bypass transmission at a time. The bypass transmission Mode comprises a Mode 1 which is already defined in the prior art and used for scheduling bypass transmission by the base station, a Mode 2 which is used for automatically selecting bypass transmission resources by the UE, and other transmission modes which can be defined in a subsequent system. Wherein the traffic type may be determined based on a traffic type or traffic priority related parameter (e.g., qoS). Wherein the transmission type comprises broadcast, multicast and unicast. The bypass transmission corresponding to one type of authorization comprises bypass transmission corresponding to dynamic authorization and bypass transmission corresponding to configured bypass authorization; further, the bypass transmissions of the bypass grants corresponding to the configuration include the bypass transmissions of the bypass grants corresponding to the Type-1 configuration and the bypass transmissions of the bypass grants corresponding to the Type-2 configuration. Optionally, the configured or preconfigured information is indicated in at least one of: RRC signaling; MAC signaling; physical layer signaling, including PDCCH/DCI and bypass grants carried on PDSCH.

In a specific embodiment, for a receiving UE bypassing data, if the UE is provided with information to turn on CBG transmission for a certain serving cell, or a certain bypass resource pool, or a certain bypass transmission mode, or a certain bypass traffic type, or a certain transmission type, or a certain class of grants, or a certain specific bypass transmission, the UE receives a bypass physical shared channel (PHYSICAL SIDELINK SHARED CHANNEL, PSSCH) scheduled by a bypass grant or SCI, including CBG of a TB of at least one bypass traffic. The UE generates and feeds back CBG bypass transmission-enabled HARQ-ACK (second HARQ-ACK feedback) information to the transmitting UE and/or the base station using a similar method as in the existing mechanism for generation of CBG-enabled downlink HARQ-ACK information.

In another specific embodiment, for a UE at the transmitting end of the bypass data, if the UE is provided with information for turning on CBG transmission for a certain serving cell, or a certain bypass resource pool, or a certain bypass transmission mode, or a certain bypass traffic type, or a certain transmission type, or a certain class of grant, or a certain specific bypass transmission, the UE receives HARQ-ACK feedback (first HARQ-ACK feedback) information for enabling the bypass transmission of CBG provided by the receiving end of the bypass data, and accordingly generates HARQ-ACK feedback (second HARQ-ACK feedback) information for reporting to the base station corresponding to the bypass transmission enabling the CBG, and transmits the HARQ-ACK feedback information to the base station. Optionally, the sender UE indicates in the SCI whether the SCI scheduled bypass transmission enables CBG. Optionally, the UE at the transmitting end also indicates in the SCI the C-DAI and/or T-DAI corresponding to the SCI scheduled bypass transmission. Optionally, the transmitting UE forwards the received HARQ-ACK feedback (first HARQ-ACK feedback) information of the CBG enabled bypass transmission to the base station as the second HARQ-ACK feedback, or regenerates the HARQ-ACK feedback (second HARQ-ACK feedback) information corresponding to the CBG enabled bypass transmission for reporting to the base station according to the received HARQ-ACK feedback (first HARQ-ACK feedback) information of the CBG enabled bypass transmission and reports the same to the base station.

The configuration method allows transmission in a certain resource pool or bypass resource transmission of certain types to be specifically configured to enable/disable CBG-based transmission according to the resource pool characteristics, the bypass service characteristics and the like in the NR V2X system, improves the configuration flexibility compared with the configuration based on a service cell in the NR system, and can better support certain UE with limited capacity.

Optionally, if the UE determines that the PDCCH detection opportunity (Monitoring Occasion, MO) carrying DCI of the bypass grant and/or the PDSCH resource carrying the bypass grant is in the slot n, the UE sends HARQ-ACK information of the bypass data in the PUCCH in the slot n+k' ₀. Wherein K' ₀ is determined based on at least one of: the bypass HARQ-ACK timing indicator indicated in the bypass grant, higher layer parameters, configured or preconfigured or predefined offset. K' ₀ is m.

Optionally, the PDCCH MO in the slot n and the PDSCH in the slot n correspond to the same or different values of K' ₀.

Optionally, the bypass HARQ-ACK timing indicator indicated in the bypass grant comprises at least one of: PDSCH to HARQ-ACK feedback timing indicator, PDCCH MO to HARQ-ACK feedback timing indicator, PSSCH to HARQ-ACK feedback timing indicator, PSCCH to HARQ-ACK feedback timing indicator, PSFCH to HARQ-ACK feedback timing indicator. Optionally, for a timing indicator of PDCCH MO to HARQ-ACK feedback, the UE obtains bypass grant in the PDCCH MO; optionally, for a timing indicator of PDSCH to HARQ-ACK feedback, the UE acquires a bypass grant in the PDSCH.

In a specific embodiment, the bypass HARQ-ACK timing indicator indicated in the bypass grant multiplexes the PDSCH in the prior art to the value of the timing indicator for HARQ-ACK feedback, and K' ₀ determined by the UE is the sum of the obtained value of the bypass HARQ-ACK timing indicator and the configured or preconfigured or predefined offset. For example, a bypass HARQ-ACK timing indicator indicated in the bypass grant of K ₀,K₀ is a value in the prior art; the UE-determined K' ₀＝K₀ + KSLoffset, KSLoffset is a configured or preconfigured or predefined offset.

In another specific embodiment, the value of the bypass HARQ-ACK timing indicator indicated in the bypass grant is different from the value of the PDSCH-to-HARQ-ACK feedback timer in the prior art, and the UE determines, according to the received signaling, whether the value of the PDSCH-to-HARQ-ACK feedback timing indicator in the prior art should be used or whether the value of the bypass HARQ-ACK timing indicator should be used, for the bypass grant or for the uplink/downlink grant in the prior art.

The method in the above two embodiments has the advantage that, because the sending UE needs to acquire the HARQ-ACK feedback (first HARQ-ACK feedback) information provided by the receiving UE before reporting the HARQ-ACK feedback (second HARQ-ACK feedback) information of the bypass data to the base station, the time delay for reporting the HARQ-ACK may be greater than the normal downlink HARQ-ACK feedback time delay in the NR system. Introducing the offset or a new value helps to support a larger HARQ-ACK feedback delay.

In another specific embodiment, the PDSCH indicated in the bypass grant to HARQ-ACK feedback timing indicator multiplexes the value of the timer in the prior art, and the UE determines K' ₀ to be the obtained value of the timer.

The method in the above embodiment has the advantage that the method of indicating the timing indicator of PDSCH to HARQ-ACK feedback as K ₀ in the prior art can be completely multiplexed, so that the UE can multiplex the HARQ-ACK information corresponding to the bypass transmission and the HARQ-ACK information corresponding to the downlink transmission in the same HARQ-ACK codebook more simply, and the complexity of the system is reduced.

Alternatively, HARQ-ACK information for bypass data may be carried on PUSCH if both are transmitted in the same slot. If the HARQ-ACK information of the bypass data is indicated in the HARQ-ACK dynamic codebook, the HARQ-ACK dynamic codebook indicating the HARQ-ACK information of the bypass data is carried on the PUSCH by adopting a method similar to the prior mechanism.

The UE transmits HARQ-ACK information (information fed back by the second HARQ-ACK) of the bypass data in the PUCCH, which is transmitted using the HARQ-ACK dynamic codebook. Since the current dynamic codebook of HARQ-ACK is only used for feeding back the HARQ-ACK information of the downlink transmission sent to the UE by the corresponding base station, when the HARQ-ACK information (second HARQ-ACK feedback) corresponding to the bypass transmission is also fed back on the uplink channel through the dynamic codebook of HARQ-ACK, there are two possible schemes: multiplexing the HARQ-ACK information corresponding to the bypass transmission and the HARQ-ACK information corresponding to the downlink transmission in the existing mechanism in the same codebook or the same sub-codebook; or respectively generating independent codebooks or sub-codebooks for the HARQ-ACK information corresponding to the bypass transmission and the HARQ-ACK information corresponding to the downlink transmission in the existing mechanism.

Optionally, the UE determines to multiplex the HARQ-ACK information corresponding to the bypass transmission and the HARQ-ACK information corresponding to the downlink transmission in the existing mechanism in the same codebook or the same sub-codebook according to the configured or preconfigured or predefined information, or generates an independent codebook or sub-codebook for the HARQ-ACK information corresponding to the bypass transmission. For example, the UE obtains information indicated by the base station in RRC signaling and/or information indicated in physical layer signaling, e.g., DCI, determines whether the HARQ-ACK feedback for the bypass transmission uses a multiplexed or independent dynamic codebook.

Details of the technical methods used in the two types of schemes are described below, respectively.

The HARQ-ACK corresponding to the bypass transmission and the HARQ-ACK corresponding to the downlink transmission are multiplexed in the same codebook or sub-codebook.

The UE acquires C-DAI and/or T-DAI information indicated by at least one of DCI, bypass authorization and SCI, and generates an HARQ-ACK dynamic codebook corresponding to HARQ-ACK information of downlink transmission and/or bypass transmission.

The C-DAI exists in DCI format 1_0 or DCI format 1_1; optionally, in a DCI format as a bypass grant. C-DAI represents the accumulated number of { serving cell, PDCCH detection timing MO } pairs; in the { serving cell, PDCCH detection opportunity MO } pair, there is PDSCH reception or SPS PDSCH release associated with DCI format 1_0 or DCI format 1_1, and there is also bypass data of bypass grant and/or bypass grant scheduling or transmission and/or reception of physical bypass shared channel PSSCH; this accumulated number is up to the current serving cell and the current PDCCH MO. The PDCCH MO includes a PDCCH MO corresponding to the DCI format 1_0 or the DCI format 1_1, and further includes a PDCCH MO corresponding to the DCI format serving as the bypass grant; that is, the bypass grant C-DAI and the PDSCH reception and/or SPS PDSCH release associated with DCI format 1_0 and/or DCI format 1_1 are jointly counted. The UE assumes the statistical order of the accumulated numbers as: firstly, according to the ascending order of the index of a service cell, and then according to the ascending order of the index of the MO of the PDCCH; or firstly, the ascending order of the serving cell indexes is firstly carried out, then the ascending order of the PDCCH MO indexes corresponding to the DCI format 1_0 or the DCI format 1_1 is carried out, and then the ascending order of the PDCCH MO indexes corresponding to the bypass authorization is carried out. Wherein the PDCCH MO index is equal to or greater than 0 and less than a radix (cardinality) of the PDCCH MO set, the radix defining a total number of PDCCH MOs.

T-DAI is present in DCI format 1_1; optionally, in a DCI format as a bypass grant. T-DAI represents the total number of { serving cell, PDCCH detection timing MO } pairs; in this { serving cell, PDCCH detection opportunity MO } pair, there is PDSCH reception or SPS PDSCH release associated with DCI format 1_0 or DCI format 1_1, and there is also bypass grant and/or transmission and/or reception of bypass data or bypass physical shared channel PSSCH scheduled with the bypass grant. Similarly, the bypass authorized T-DAI and the PDSCH received T-DAI associated with DCI format 1_1 are jointly counted. The total number is updated from PDCCH MO to PDCCH MO up to the current PDCCH MO.

The UE derives the C-DAI and/or T-DAI of the HARQ-ACK joint count for the bypass transmission and the HARQ-ACK for the downlink transmission in a similar way as the existing mechanism. The UE assumes that in one PDCCH MO, all DCI formats 1_1, and the T-DAI value in the DCI format as bypass grant (if the T-DAI exists in the DCI format as bypass grant) are the same.

Based on the C-DAI and T-DAI values in each DCI, the UE may generate a dynamic codebook including HARQ-ACK information for X PDSCH reception and/or SPS PDSCH release and/or bypass data transmission, where X is equal to the T-DAI value in the last detected DCI. HARQ-ACK information for PDSCH reception and/or SPS PDSCH release and/or bypass data transmission scheduled by a certain DCI is arranged at the Y-th position of the dynamic codebook, Y being equal to the value of C-DAI in the DCI. The UE determines HARQ-ACK information bits for PDSCH reception and/or SPS PDSCH release and/or bypass data transmission in a similar manner to the existing mechanism, but if the DAI used in determining a certain HARQ-ACK information bit is the DAI indicated in the DCI format as a bypass grant (including C-DAI and/or T-DAI), the determined corresponding HARQ-ACK information bit indicates HARQ-ACK feedback (second HARQ-ACK feedback) information corresponding to the bypass transmission; otherwise, if the DAI used when determining a certain HARQ-ACK information bit is the DAI indicated in the DCI format 1_0 or 1_1 (including a C-DAI and/or a T-DAI), the determined corresponding HARQ-ACK information bit indicates HARQ-ACK feedback information corresponding to downlink transmission. And after arranging the HARQ-ACK information of all the detected DCI scheduled data, filling NACK in the positions where the HARQ-ACK information is not filled in the rest of the dynamic codebook.

In addition, in the prior art, if a part of serving cells enable CBG transmission and another part of serving cells do not enable CBG transmission, the UE generates two HARQ-ACK sub-codebooks for TB-based feedback and CBG-based feedback, respectively, and the UE places the HARQ-ACK sub-codebook corresponding to the CBG-based feedback in the HARQ-ACK sub-codebook corresponding to the TB-based feedback to obtain a final HARQ-ACK dynamic codebook; accordingly, the UE assumes that the values of the C-DAI and T-DAI corresponding to each sub-codebook are counted separately.

Thus, optionally, if part of the serving cell and/or part of the bypass transmission enables CBG transmission and another part of the serving cell and/or another part of the bypass transmission does not enable CBG transmission, the UE may also generate two HARQ-ACK sub-codebooks, the first HARQ-ACK sub-codebook corresponding to HARQ-ACK feedback for TB-based downlink and/or bypass transmission, the second HARQ-ACK sub-codebook corresponding to HARQ-ACK feedback for CBG-based downlink and/or bypass transmission; accordingly, the UE assumes that the C-DAI and T-DAI corresponding to the two HARQ-ACK sub-codebooks are counted separately, and that the C-DAI and/or T-DAI corresponding to the downlink transmission is jointly counted in each sub-codebook. The method of generating two HARQ-ACK subcodebooks by the UE is similar to the prior art, but the parameters used include parameters of the bypass transmission corresponding to the role of the parameters in the prior art in addition to the parameters in the prior art.

Optionally, the bypass grant in the above method is a dynamic grant; HARQ-ACK information corresponding to the configured bypass grant (configured grant) scheduled bypass transmission is also indicated in the HARQ-ACK dynamic codebook. The UE not only generates a dynamic codebook based on the C-DAI and/or the T-DAI in each DCI according to the method, but also judges whether the bypass authorization configured in the bypass system is in an activated state according to a preset sequence; if the P configured bypass grants are activated and the configured bypass grant scheduled bypass transmission meets a preset condition, the UE adds HARQ-ACK feedback (second HARQ-ACK feedback) information of the bypass transmission scheduled by the activated P configured bypass grants at the tail of the dynamic codebook. Optionally, the UE adds p×q bits at the tail of the dynamic codebook, where the p×q bits correspond to the HARQ-ACK feedback (second HARQ-ACK feedback) information of the bypass transmission scheduled by the activated P configured bypass grants, and each configured HARQ-ACK feedback of the bypass transmission scheduled by the bypass grant includes Q HARQ-ACK information bits. Wherein p=1, or P is a positive integer. Similar to SPS PDSCH in the existing mechanism, since the configured bypass grant activates periodic multi-block bypass resources, which cannot be scheduled by DAI, its corresponding HARQ-ACK information is placed at the tail of the dynamic codebook.

Optionally, the bypass transmission scheduled for the configured bypass grant meets a preset condition, including: if the configured bypass grant scheduled bypass transmission is on slot n-K '_0,sps or the configured bypass grant scheduled bypass transmission is within slot interval n-K' _0,sps-1,n-K′_0,sps-2 and the UE transmits a HARQ-ACK dynamic codebook including feedback (second HARQ-ACK feedback) information of the bypass transmission on PUCCH on slot n, the configured bypass grant scheduled bypass transmission meets the preset condition. Where K ' _0,sps is the feedback timing value of the configured bypass grant scheduled bypass transmission to HARQ, and K ' _0,sps-1 and K ' _0,sps-2 are the maximum and minimum values of the feedback timing of the configured bypass grant scheduled bypass transmission to HARQ.

If the configured bypass grant scheduled bypass transmission does not meet the preset condition (e.g., the time domain resource location of the configured bypass grant scheduled bypass transmission is not within the time slot interval in the preset condition), then:

The second HARQ-ACK feedback information of the bypass transmission scheduled by the configuration authorization which does not accord with the preset condition is not added into the first HARQ-ACK dynamic codebook; for example, the UE acquires Q configuration grants in total, and when the UE reports the first HARQ-ACK dynamic codebook, if Q 'configuration grants in the Q configuration grants meet a preset condition, the UE adds, at the tail of the first HARQ-ACK dynamic codebook, second HARQ-ACK feedback information of bypass transmission scheduled by the Q' configuration bypass grants;

Or, adding the second HARQ-ACK feedback information of the all configured grant scheduled bypass transmission to the first HARQ-ACK dynamic codebook, and setting the second HARQ-ACK feedback information of the configured grant scheduled bypass transmission which does not meet the preset condition to the first predetermined state.

Optionally, if the configured bypass grant or the dynamically grant scheduled bypass transmission is not actually transmitted because no bypass data arrives at the higher layer, the second HARQ-ACK feedback information of the corresponding bypass transmission is set to a second predetermined state.

In a specific example, the first predetermined state is NACK, and the base station may determine, according to the position of the bypass transmission scheduled by the configured grant configured to the UE, that the bypass transmission scheduled by the configured bypass grant by the NACK does not meet the preset condition, but is not a transmission failure (or the first predetermined state is ACK, and the base station may determine that the ACK is not used to indicate that the transmission is successful); the second predetermined state is ACK for indicating to the base station that there is no need to schedule bypass resources for retransmission (specifically, the bypass resources for retransmission correspond to the configured bypass grant or the dynamically grant scheduled retransmission of the bypass transmission).

Optionally, the UE adds the HARQ-ACK information bit corresponding to the SPS PDSCH first and then adds the HARQ-ACK information bit corresponding to the configured bypass grant; or vice versa.

Optionally, the UE orders the SPS PDSCH together with HARQ-ACK information bits corresponding to the configured bypass grant according to the same criteria and adds the ordered HARQ-ACK information bits to the dynamic codebook.

Optionally, if P >1, and/or if the same criteria orders the SPS PDSCH together with the HARQ-ACK information bits corresponding to the configured bypass grant, the corresponding HARQ-ACK feedback (second HARQ-ACK feedback) for the bypass transmission of the configured bypass grant schedule is sequentially added at the HARQ-ACK dynamic codebook end-tail in ascending order of the index of the configured bypass grant (if the parameter exists) and/or the index of the SPS PDSCH (if the parameter exists).

Optionally, if P >1, and/or if the same criteria orders the SPS PDSCH together with the HARQ-ACK information bits corresponding to the configured bypass grant, the corresponding HARQ-ACK feedback (second HARQ-ACK feedback) for the configured bypass grant scheduled bypass transmission is sequentially added at the end of the HARQ-ACK dynamic codebook according to the order of the resources of the configured bypass grant scheduled bypass transmission and/or the resources of the SPS PDSCH. Optionally, determining the sequence of the configured bypass transmission resources and/or the SPS PDSCH resources of the bypass grant scheduling according to a method of firstly ascending frequency domain resources and then ascending time domain resources; or the time domain resources can be increased first and then the frequency domain resources can be increased.

Alternatively, if the UE generates two HARQ-ACK subcodebooks for TB-based feedback and CBG-based feedback, respectively: adding HARQ-ACK information corresponding to bypass grant (if present) of the configuration that does not enable activation of CBG at the end of the HARQ-ACK sub-codebook of TB-based feedback, and adding HARQ-ACK information corresponding to bypass grant (if present) of the configuration that enables activation of CBG at the end of the HARQ-ACK sub-codebook of CBG-based feedback; or at the end of the last sub-codebook, adding HARQ-ACK information corresponding to the bypass grant (if any) of the configuration that is not enabled and that is enabled for CBG activation in the order corresponding to the two sub-codebooks, i.e. if the order of the two sub-codebooks is that the previous sub-codebook is a TB-based sub-codebook and the latter sub-codebook is a CBG-based sub-codebook, adding HARQ-ACK information corresponding to the bypass grant (if any) of the configuration that is not enabled for CBG first, and then adding HARQ-ACK information corresponding to the bypass grant (if any) of the configuration that is enabled for CBG, and vice versa.

Optionally, the HARQ-ACK feedback for each configured bypass grant scheduled bypass transmission includes Q HARQ-ACK information bits, the value of Q is determined based on whether the HARQ-ACK feedback is feedback for the TB or CBG stage, or the value of Q is the same for both the TB and CBG stage feedback.

It should be noted that, in this embodiment, the HARQ-ACK feedback (second HARQ-ACK feedback) information corresponding to the bypass transmission scheduled by the configured bypass grant is placed at the tail of the HARQ-ACK dynamic codebook as an example; but it may similarly be placed at a specific location of the HARQ-ACK dynamic codebook, e.g. at the starting location.

Optionally, in determining the dynamic codebook, if BWP switching occurs, the UE does not feedback PDSCH before BWP switching, SPS PDSCH release, HARQ-ACK information of bypass data. Optionally, in the process of determining the dynamic codebook, if the resource pool switching occurs, the UE feeds back or does not feed back HARQ-ACK information of the bypass data before the resource pool switching.

Based on the generation mode of the dynamic codebook, the process of HARQ-ACK feedback of downlink transmission and HARQ-ACK feedback of bypass transmission can be simplified, so that UE does not need to feed back through separate signaling, thereby saving feedback overhead; the combined count DAI is used instead of the respectively counted DAI, so that the UE can calculate the C-DAI and the T-DAI more simply, the number of the C-DAI and the T-DAI which are buffered simultaneously is reduced, a combined HARQ-ACK codebook is correspondingly generated instead of a plurality of HARQ-ACK codebooks, and the complexity of the system is reduced.

In the above alternative embodiment, the dynamic bypass grant and the configured bypass grant are indicated in the same HARQ-ACK dynamic codebook, and the configured bypass grant is added at the tail of HARQ-ACK in a similar manner as in the prior art for indicating HARQ-ACK information of SPS PDSCH. Alternatively, the dynamic bypass grant and the configured bypass grant are indicated in two separate HARQ-ACK dynamic codebooks; wherein the DAI of the dynamic bypass grant is jointly counted with the DAI indicated in the DCI formats for scheduling downlink transmission, e.g., DCI formats 1_0 and 1_1, the method of generating the dynamic codebook containing the HARQ-ACK information of the dynamic bypass grant by the UE is similar to the above embodiments; the method by which the UE generates the dynamic codebook containing the configured bypass grant HARQ-ACK information is similar to that in the above embodiment, without the DAI indication.

Fig. 3 schematically provides a specific embodiment. In this embodiment it is assumed that the T-DAI will be indicated in the bypass grant. The case where the UE is configured with 3 serving cells, whether CBG is configured or not, is shown. The UE generating CBG-level HARQ-ACK information for PDSCH reception scheduled by DCI format 1_1 on serving cells 1 and 2, and the UE being configured to generate CBG-level HARQ-ACK information for bypass transmission of bypass grant scheduling on serving cells 1 and 2; the UE generates HARQ-ACK information at the TB level for PDSCH reception scheduled by DCI format 1_0 on serving cell 1 and 2, PDSCH reception scheduled by DCI format 1_1 and 1_0 on serving cell 3, or SPS PDSCH release, and the UE is configured to generate HARQ-ACK information at the TB level for bypass transmission of bypass grant scheduling on serving cell 3.

The information acquired by the UE at the 4 PDCCH MOs shown in fig. 3 is as follows:

The first PDCCH MO, DCI format 1_1 on serving cell 1 scheduled CBG-enabled PDSCH1, bypass grant on serving cell 2 scheduled CBG-enabled bypass transmission 1, DCI format 1_1 on serving cell 3 scheduled non-CBG-enabled PDSCH2;

the second PDCCH MO, DCI format 1_0 on serving cell 1 schedules a non-CBG enabled PDSCH3, and bypass grant on serving cell 3 schedules a non-CBG enabled bypass transmission 2;

The third PDCCH MO, DCI format 1_1 on serving cell 3, schedules a non-CBG enabled PDSCH4; the PDCCH MO actually has the bypass transmission 3 of the bypass grant schedule in the serving cell 1, but the UE fails to detect the bypass grant;

The fourth PDCCH MO, DCI format 1_1 on serving cell 1 schedules CBG-enabled PDSCH5 and bypass grant on serving cell 2 schedules CBG-enabled bypass transmission 4.

The (C-DAI, T-DAI) indicated in each DCI format or bypass grant is shown in fig. 3.

It should be additionally noted that PDSCH and bypass transmission adjacent to the right side of the DCI are mainly used to illustrate the type and identity of the transmission scheduled by the DCI, and do not represent the time-frequency location of the transmission scheduled by the DCI. For example, the time domain position of the bypass transmission 1 scheduled by the indicated (C-DAI, T-DAI) as the bypass grant of (2, 2) is not necessarily in the time slot in which the first PDCCH MO is located, and the other bypass transmissions 2-4 are vice versa.

The UE generates HARQ-ACK dynamic codebook according to DCI format 1_0, DCI format 1_1 and C-DAI and T-DAI indicated in bypass grant in 3 service cells as shown in the figure. Wherein, for the 3 rd L bit in the second sub-codebook (CBG-level codebook), since the UE does not receive DCI corresponding to the C-DAI, NACK is padded on the corresponding HARQ-ACK information bit.

Optionally, the UE further adds HARQ-ACKs for bypass transmissions of the configured bypass grant schedule at the tail of each sub-codebook; added is HARQ-ACK information for the bypass transmission, which may be one or more configured bypass grant schedules. Wherein, for the first subcodebook of TB level, adding HARQ-ACK information of bypass transmission of bypass authorized scheduling of configuration without enabling CBG, 1 TB corresponds to 1 bit HARQ-ACK information in the bypass transmission of bypass authorized scheduling of each configuration; for the second subcodebook of the CBG stage, HARQ-ACK information for bypass transmissions of the configured bypass grant schedules of CBG is added, 1 TB corresponding to L-bit HARQ-ACK information in each configured bypass transmission of the bypass grant schedule. If each configured bypass grant schedules a plurality of bypassed TBs, the HARQ-ACK information of the TB stage and the CBG stage corresponds to a plurality of 1-bit and a plurality of L-bit HARQ-ACK information, respectively.

Alternatively, the HARQ-ACK for the bypass transmission and the HARQ-ACK for the downlink transmission use separate codebooks or subcodebooks.

The UE acquires the C-DAI and/or T-DAI information indicated by the DCI, generates a HARQ-ACK dynamic codebook corresponding to the downlink HARQ-ACK information (referred to as a downlink HARQ-ACK dynamic codebook in this embodiment for convenience of description), and multiplexes the existing mechanism.

The UE acquires the C-DAI and/or T-DAI information indicated in the bypass grant and/or SCI, and generates a HARQ-ACK dynamic codebook corresponding to the bypass transmitted HARQ-ACK information (referred to as a bypass HARQ-ACK dynamic codebook in this embodiment for convenience of description).

The UE arranges the downlink HARQ-ACK dynamic codebook and the bypass HARQ-ACK dynamic codebook in sequence, thereby generating a final HARQ-ACK dynamic codebook. For example, the UE obtains the final HARQ-ACK dynamic codebook by placing the bypass HARQ-ACK codebook in the downlink HARQ-ACK dynamic codebook.

The procedure for generating the bypass HARQ-ACK dynamic codebook is described below.

Optionally, the DAI corresponding to the downlink HARQ-ACK dynamic codebook and the DAI corresponding to the bypass HARQ-ACK dynamic codebook are counted separately.

C-DAI corresponding to the bypass HARQ-ACK dynamic codebook: optionally, the C-DAI is present in a DCI format that is a bypass grant. C-DAI represents the accumulated number of { serving cell, PDCCH detection timing MO } pairs; in the { serving cell, PDCCH detection opportunity MO } pair, there is a bypass grant and/or transmission and/or reception of bypass data scheduled with the bypass grant or a bypass physical shared channel PSSCH; this accumulated number is up to the current serving cell and the current PDCCH MO. Wherein, the PDCCH MO includes a PDCCH MO corresponding to the DCI format serving as the bypass grant, and does not include a PDCCH MO corresponding to the DCI format 1_0 or the DCI format 1_1, that is, the C-DAI of the bypass grant and the C-DAI of the PDSCH reception or the SPS PDSCH release associated with the DCI format 1_0 or the DCI format 1_1 are counted respectively. The UE assumes the statistical order of the accumulated numbers as: the ascending order is firstly according to the index of the service cell, and then the ascending order is according to the index of the PDCCH MO. Wherein the PDCCH MO index is greater than or equal to 0 and less than a radix (cardinality) of the PDCCH MO set, the radix defining a total number of PDCCH MOs or the radix defining a total number of PDCCH MOs corresponding to bypass transmission.

For T-DAI corresponding to bypass HARQ-ACK dynamic codebook: the T-DAI is present in the DCI format as a bypass grant. T-DAI represents the total number of { serving cell, PDCCH detection timing MO } pairs; in the { serving cell, PDCCH detection opportunity MO } pair, there is a bypass grant and/or transmission and/or reception of bypass data scheduled with the bypass grant or a bypass physical shared channel PSSCH; similarly, the bypass grant T-DAI and the PDSCH reception or SPS PDSCH release T-DAI associated with DCI format 1_0 or DCI format 1_1 are counted separately. The total number is updated from PDCCH MO to PDCCH MO up to the current PDCCH MO.

The UE derives the C-DAI and/or T-DAI of the HARQ-ACK corresponding to the bypass transmission in a similar way as the existing mechanism. The UE assumes that the T-DAI values in all DCI formats as bypass grants are the same in one PDCCH MO.

Based on the C-DAI and T-DAI values in each DCI format used as a bypass grant, the UE may generate a bypass HARQ-ACK dynamic codebook comprising HARQ-ACK information for X bypass data transmissions, X being equal to the T-DAI value in the last detected bypass grant. The HARQ-ACK information of bypass data transmission scheduled by a certain DCI is arranged at the Y-th position of the dynamic codebook, and Y is equal to the value of C-DAI in the DCI. The UE determines HARQ-ACK information bits for bypass data transmission in a similar manner to the existing mechanism, but determines that the DAI used in determining a certain HARQ-ACK information bit is the DAI indicated in the DCI format as the bypass grant (including C-DAI and/or T-DAI), and the determined corresponding HARQ-ACK information bit indicates HARQ-ACK feedback (second HARQ-ACK feedback) information corresponding to the bypass transmission. And after arranging the HARQ-ACK information of all the detected DCI scheduled data, filling NACK in the positions of the dynamic codebook, which are not filled with the HARQ-ACK information, in the rest positions.

Optionally, if some of the bypass transmissions enable CBG transmission and another of the bypass transmissions do not enable CBG transmission, the UE may also generate two bypass HARQ-ACK subcodebooks, a first bypass HARQ-ACK subcodebooks corresponding to HARQ-ACK feedback for TB-based bypass transmissions and a second bypass HARQ-ACK subcodebooks corresponding to HARQ-ACK feedback for CBG-based bypass transmissions; accordingly, the UE assumes that the C-DAI and T-DAI corresponding to the two bypass HARQ-ACK sub-codebooks are counted separately. The method of UE generating two bypass HARQ-ACK sub-codebooks is similar to the prior art, but the parameters used are parameters of the bypass transmission corresponding to the role of the parameters in the prior art.

Optionally, the bypass grant in the above method is a dynamic grant; HARQ-ACK information corresponding to the configured bypass grant (configured grant) scheduled bypass transmission is also indicated in the HARQ-ACK dynamic codebook. In addition to generating the dynamic codebook based on the C-DAI and/or T-DAI in each DCI according to the above method, the UE may add the information of the configured HARQ-ACK feedback (second HARQ-ACK feedback) information of the bypass grant scheduled bypass transmission to the tail or other specific positions of the bypass HARQ-ACK dynamic codebook according to a similar method in a scenario in which the independent codebook/sub-codebook is used for the HARQ-ACK corresponding to the bypass transmission and the HARQ-ACK corresponding to the downlink transmission.

Alternatively, if the UE generates two bypass HARQ-ACK subcodebooks for TB-based feedback and CBG-based feedback, respectively: adding HARQ-ACK information corresponding to bypass grant (if present) of the configuration that does not enable activation of CBG at the end of the bypass HARQ-ACK sub-codebook of TB-based feedback, and adding HARQ-ACK information corresponding to bypass grant (if present) of the configuration that enables activation of CBG at the end of the bypass HARQ-ACK sub-codebook of CBG-based feedback; or at the end of the last bypass sub-codebook, adding HARQ-ACK information corresponding to the bypass grants (if any) of the configuration that is not enabled and that is enabled for the activation of CBG in the order corresponding to the two bypass sub-codebooks, i.e. if the order of the two bypass sub-codebooks is that of the previous bypass sub-codebook being a TB-based sub-codebook and the latter bypass sub-codebook being a CBG-based sub-codebook, adding HARQ-ACK information corresponding to the bypass grants (if any) of the configuration that is not enabled for CBG first, and then adding HARQ-ACK information corresponding to the bypass grants (if any) of the configuration that is enabled for CBG, and vice versa.

Other mechanisms of the UE determining the independent bypass HARQ-ACK dynamic codebook are similar to those in the scenario where the UE determines the HARQ-ACK dynamic codebook for HARQ-ACK multiplexing corresponding to the bypass transmission and the downlink transmission, and explanation is not repeated.

Based on the generation mode of the dynamic codebook, feedback expenditure can be saved similarly; by using the respectively counted DAIs instead of the jointly counted DAIs, the UE can more effectively utilize the prior art when generating the HARQ-ACK codebook corresponding to the downlink transmission, meanwhile, the DAI information of the downlink transmission and the bypass transmission is indicated more clearly, and the influence of the missed detection of the DAIs of the downlink transmission on the HARQ-ACK codebook of the bypass transmission read by the base station is avoided, and vice versa.

In the scenario where the UE determines that the bypass transmission corresponds to the HARQ-ACK dynamic codebook of the HARQ-ACK multiplex, an embodiment is provided in which the dynamic bypass grant and the configured bypass grant are indicated in two separate HARQ-ACK dynamic codebooks or subcodebooks. Similarly, in the scenario that the UE determines a bypass HARQ-ACK dynamic codebook and a downlink HARQ-ACK dynamic codebook, which are mutually independent of HARQ-ACKs corresponding to bypass transmission and downlink transmission, the corresponding HARQ-ACK information may be indicated in two independent HARQ-ACK dynamic codebooks or subcodebooks based on whether the bypass grant is a dynamic grant or a configured grant. Optionally, the UE may further divide the bypass HARQ-ACK dynamic codebook into a plurality of HARQ-ACK subcodebooks corresponding to different status values according to at least one of a configured Type-1 or Type-2 grant, a bypass resource pool corresponding to scheduling information indicated by the bypass grant, and a bypass transmission scheduled by the bypass grant being broadcast/multicast/unicast; accordingly, the C-DAIs and/or T-DAIs of different HARQ-ACK sub-codebooks are counted separately.

Fig. 4 schematically provides a specific embodiment. The case where the UE is configured with 3 serving cells, whether CBG is configured or not, is shown. The UE generating CBG-level HARQ-ACK information for PDSCH reception scheduled by DCI format 1_1 on serving cells 1 and 2, and the UE being configured to generate CBG-level HARQ-ACK information for bypass transmission of bypass grant scheduling on serving cells 1 and 2; the UE generates HARQ-ACK information at the TB level for PDSCH reception scheduled by DCI format 1_0 on serving cell 1 and 2, PDSCH reception scheduled by DCI format 1_1 and 1_0 on serving cell 3, or SPS PDSCH release, and the UE is configured to generate HARQ-ACK information at the TB level for bypass transmission of bypass grant scheduling on serving cell 3.

The information acquired by the UE at the 4 PDCCH MOs shown in fig. 4 is as follows:

The (C-DAI, T-DAI) indicated in each DCI format or bypass grant is shown in fig. 4.

It should be additionally noted that PDSCH and bypass transmission adjacent to the right side of the DCI are mainly used to illustrate the type and identity of the transmission scheduled by the DCI, and do not represent the time-frequency location of the transmission scheduled by the DCI. For example, the time domain position of the bypass transmission 1 scheduled by the indicated (C-DAI, T-DAI) as the bypass grant of (1, 1) is not necessarily in the time slot in which the first PDCCH MO is located, and the other bypass transmissions 2-4 are vice versa.

The UE generates a HARQ-ACK dynamic codebook according to DCI format 1_0, DCI format 1_1 and C-DAI and T-DAI indicated in the bypass grant in the 3 serving cells, and the generated HARQ-ACK dynamic codebook includes a downlink HARQ-ACK dynamic codebook and a bypass HARQ-ACK dynamic codebook, where the downlink/bypass HARQ-ACK dynamic codebook is shown in fig. 4.

Wherein, for the 2 nd L bit in the second sub-codebook (CBG level codebook) in the bypass HARQ-ACK dynamic codebook, since the UE does not receive DCI corresponding to the C-DAI, NACK is filled on the corresponding HARQ-ACK information bit.

In addition, the UE adds the configured HARQ-ACK for the bypass transmission of the bypass grant schedule at the end of each sub-codebook, and the specific details are similar to those in fig. 4.

In a second aspect of the application, a HARQ-ACK semi-static codebook is used for HARQ-ACK feedback for corresponding bypass data on the uplink channel.

The first HARQ-ACK feedback in the second aspect is first HARQ-ACK feedback information, the second HARQ-ACK feedback is second HARQ-ACK feedback information, and the HARQ-ACK semi-static codebook is a first HARQ-ACK semi-static codebook.

In this embodiment, the transmitting UE (first UE) of the bypass data adopts Mode 1 transmission, that is, bypass transmission scheduled by the base station. The UE requests bypass transmission to the base station, obtains bypass authorization for scheduling the bypass transmission sent by the base station, sends bypass data and/or bypass control information SCI according to scheduling information indicated in the bypass authorization, and receives HARQ-ACK feedback information provided by receiving end UE (second UE) of the bypass data; and then, the transmitting end UE reports HARQ-ACK feedback of the corresponding bypass data to the base station. For convenience of distinction, the HARQ-ACK feedback provided by the UE at the receiving end of the bypass data is referred to as a first HARQ-ACK feedback, and the HARQ-ACK feedback of the corresponding bypass data reported by the UE to the base station is referred to as a second HARQ-ACK feedback. The first/second is merely a designation and does not imply that there is any predetermined order in logic or time.

In this embodiment, the UE reports a second HARQ-ACK feedback to the base station, where the second HARQ-ACK feedback is transmitted on the uplink channel using the semi-static codebook of HARQ-ACKs. And the UE generates a HARQ-ACK semi-static codebook corresponding to the bypass transmission and reports the semi-static codebook to the base station.

Optionally, the semi-static codebook is carried on PUCCH as UCI; for example, the UCI includes HARQ-ACK information bits corresponding to the semi-static codebook. Optionally, the semi-static codebook is carried on PUSCH. The UE generates a HARQ-ACK semi-static codebook for corresponding bypass transmissions carried on PUCCH, comprising:

Determining PUCCH resources carrying second HARQ-ACK feedback information;

determining a candidate bypass reception occasion set;

And placing the generated HARQ-ACK information bits in sequence to generate a HARQ-ACK semi-static codebook corresponding to the second HARQ-ACK feedback information.

Or comprises:

Determining PUCCH resources carrying second HARQ-ACK feedback information;

determining a candidate bypass reception opportunity set and a candidate PDSCH reception opportunity set;

generating corresponding HARQ-ACK information bits for each candidate bypass reception opportunity and candidate PDSCH reception opportunity in the candidate bypass reception opportunity set and the candidate PDSCH reception opportunity set;

The generated HARQ-ACK information bits are placed in order to generate a HARQ-ACK semi-static codebook containing the second HARQ-ACK feedback information.

The process of generating HARQ-ACK (second HARQ-ACK feedback) information bits corresponding to the bypass transmission by the UE, and the process of determining time domain resources corresponding to the second HARQ-ACK feedback reported to the base station in the PUCCH by the UE are similar to those in the first embodiment, and the description will not be repeated. HARQ-ACK information for bypass data indicated by the HARQ-ACK semi-static codebook may also be carried on PUSCH similarly as in embodiment one.

The UE transmits HARQ-ACK information (information fed back by the second HARQ-ACK) of the bypass data in the PUCCH, which is transmitted using the HARQ-ACK semi-static codebook. Since the semi-static codebook of HARQ-ACK is currently only used to feed back the HARQ-ACK information of the downlink transmission sent by the corresponding base station to the UE, when the HARQ-ACK information corresponding to the bypass transmission (second HARQ-ACK feedback) is also fed back on the uplink channel through the HARQ-ACK semi-static codebook, similarly to the first embodiment, there are two possible schemes: multiplexing the HARQ-ACK information corresponding to the bypass transmission and the HARQ-ACK information corresponding to the downlink transmission in the existing mechanism in the same codebook or the same sub-codebook; or respectively generating independent codebooks or sub-codebooks for the HARQ-ACK information corresponding to the bypass transmission and the HARQ-ACK feedback information corresponding to the downlink transmission.

Optionally, the UE determines to multiplex the HARQ-ACK information corresponding to the bypass transmission and the HARQ-ACK information corresponding to the downlink transmission in the existing mechanism in the same codebook or the same sub-codebook according to the configured or preconfigured or predefined information, or generates an independent codebook or sub-codebook for the HARQ-ACK information corresponding to the bypass transmission. For example, the UE obtains information indicated by the base station in RRC signaling and/or information indicated in physical layer signaling, e.g., DCI, determines whether the HARQ-ACK feedback for the bypass transmission uses a multiplexed or independent semi-static codebook.

The second aspect is mainly different from the first aspect in that the specific procedure of generating the HARQ-ACK codebook by the UE according to the HARQ-ACK information bits of the corresponding bypass transmission is described in detail below.

The HARQ-ACK corresponding to the bypass transmission and the HARQ-ACK corresponding to the downlink transmission use independent codebooks or subcodebooks

The UE determines a set of candidate bypass reception occasions for the activated BWP and/or resource pool for bypass in each serving cell corresponding to a given HARQ-ACK feedback time unit. In the bypass system, each bypass resource where there may be a bypass transmission is referred to as a candidate bypass reception occasion, and a set of candidate bypass reception occasions, that is, a set of all candidate bypass reception occasions corresponding to a given HARQ-ACK feedback time unit, is determined.

Optionally, the candidate bypass reception occasion set is BWP and/or resource pool specific, one for each BWP and/or resource pool for which HARQ-ACK semi-static codebook is enabled; or, the candidate bypass reception occasion set includes candidate bypass reception occasions in a plurality of BWP and/or resource pools, which may be all or a specific subset of all configured BWP and/or resource pools of the UE.

Optionally, for the bypass resources for which there may be a bypass transmission, the UE determines that the bypass transmission includes at least one of PSSCH transmission, PSCCH transmission, PSFCH transmission, PSSCH reception, PSCCH reception, PSFCH reception according to a configuration/pre-defined criterion. In a specific embodiment, the UE determines to use the bypass resources that may have been transmitted by the PSSCH, or the bypass resources that may have been received by PSFCH, as candidate bypass reception opportunities.

Optionally, the UE determining the candidate bypass reception occasion includes determining, for each serving cell corresponding to the given HARQ-ACK feedback time unit, at least one of a time domain resource range, a frequency domain resource range, and a code domain resource range including the candidate bypass reception occasion, for the BWP and/or the resource pool activated for bypass.

Optionally, the UE determines a time domain resource range including candidate bypass reception opportunities, including: the UE obtains the time slot timing set K' ₁,K′₁ associated with the BWP and/or the resource pool as a value set, which is used to indicate the time domain interval between the bypass transmission and the second HARQ-ACK report corresponding to the bypass transmission. If the given HARQ-ACK feedback time unit is located in the slot n, the UE sequentially determines, for all possible values of K '₁, whether there is a possibility of bypass transmission on the slot n-K' ₁, and if so, counts the bypass resources corresponding to the slot into the candidate bypass reception occasion set. K' ₁ is q.

Alternatively, K' ₁ indicates the number of slots in a physical sense, or the number of slots configured to bypass. When K '₁ indicates the number of slots in a physical sense, the meaning of slot n-K' ₁ is the same as in the prior art. When K ' ₁ indicates the number of slots allocated to the bypass, the meaning of slot n-K ' ₁ is that the K ' ₁ th slot before slot n is allocated to the bypass, rather than simply calculated from the index in the physical sense of the slot.

Alternatively, if K '₁ indicates the number of slots in a physical sense, the UE determines if there is a possible bypass transmission on slot n-K' ₁, including: the UE judges whether the time slot n-K' ₁ is a time slot configured for bypass; if so, it is further determined whether the slot n-K' ₁ is configured for a bypass resource (e.g., a bypass resource for bypassing a broadcast channel) that does not meet the bypass transmission definition in the present embodiment; if not, then the time slot n-K' ₁ is counted into the candidate bypass reception opportunity set; otherwise, the time slot n-K' ₁ is not counted in the candidate set of bypass reception opportunities. Alternatively, if K '₁ indicates the number of slots configured for bypass, the UE determines if there is a possible bypass transmission on slot n-K' ₁, including: the UE determines whether the slot n-K' ₁ is configured as a bypass resource (e.g., a bypass resource for bypassing a broadcast channel) for a bypass transmission definition that does not conform to the present embodiment; if not, then the time slot n-K' ₁ is counted into the candidate bypass reception opportunity set; otherwise, the time slot n-K' ₁ is not counted in the candidate set of bypass reception opportunities.

Optionally, the UE determines candidate bypass reception opportunities in each time slot within the time domain resource range, and the set of candidate bypass reception opportunities consists of candidate bypass reception opportunities in all time slots within the time domain resource range. Alternatively, if time slot n-K' ₁ is counted in the candidate set of bypass reception opportunities, the UE determines if multiple bypass transmissions are possible in one time slot and/or how many possible bypass transmissions are possible in one time slot. The UE determines how many possible bypass transmissions will exist in a slot based on at least one of the frequency domain resource range, the code domain resource range, and the configuration of resources used for the bypass transmissions for the bypass reception opportunity. Accordingly, the UE determines how many candidate bypass reception opportunities for the corresponding slot n-K' ₁ to count.

Optionally, the UE determining how many possible bypass transmissions will exist in a time slot includes the UE determining a total size of bypass resources existing in a time slot according to at least one of a frequency domain resource range and a code domain resource range of candidate bypass reception opportunities; and determining the number of bypass resources that may be used for bypass transmission that exist in one slot based on the total size and at least one of the time domain granularity, the frequency domain granularity, and the code domain granularity of the resources used for bypass transmission indicated in the configuration of the resources used for bypass transmission.

Optionally, the UE determines whether there is more than one number of bypass resources to be used for bypass transmission in a slot based on whether the UE capability supports simultaneous transmission of multiple bypass transmissions.

Optionally, the UE determines the number of time domain granularities of resources used for the bypass transmission according to the UE capability and whether the BWP and/or the resource pool corresponding to the candidate bypass reception occasion set are configured to enable the transmission at the symbol level, and if enabled, the configuration of the transmission at the symbol level. Because symbol-level PDSCH transmissions are supported in NR systems, depending on the UE capabilities, the UE may assume one or more PDSCH transmissions in a slot and calculate one or more candidate PDSCH reception opportunities accordingly. Similarly, depending on the UE capability and whether symbol-level transmission is enabled or not in the bypass system, the UE may assume one or more bypass transmissions on bypass resources in a time slot and a given frequency domain granularity (e.g., a subchannel), and calculate one or more candidate bypass reception opportunities accordingly.

Optionally, the UE determines that the frequency domain resource range including the candidate bypass reception occasion is the entire frequency domain resource of the BWP and/or resource pool corresponding to the candidate bypass reception occasion set, or is a configured/preconfigured/predefined subset of the entire frequency domain resource.

Optionally, the UE determines that the range of code domain resources including the candidate bypass reception occasion is high-level configured; optionally, the maximum number of bypass transmissions that can code division multiplex, CDM, over a block of bypass time frequency resources is determined according to a higher layer configuration.

In a specific embodiment, the UE is configured to feedback the second HARQ-ACK feedback information to the base station as a sending end of the bypass data. The UE does not enable transmission at the symbol level, i.e. only at the subframe level is supported. Assuming that the UE sends the second HARQ-ACK feedback to the base station in slot n, determining the set of candidate bypass reception opportunities for the corresponding one of the resource pools comprises: the UE acquires a time slot time sequence set K ' ₁ associated with the resource pool, sequentially judges whether bypass transmission is possible on a time slot n-K ' ₁ according to all possible values of K ' ₁, and if so, counts the bypass resource corresponding to the time slot into a candidate bypass receiving opportunity set; assuming that the resource pool includes K frequency domain sub-channels (possibly at least one of the PSSCH sub-channels, PSCCH sub-channels, PSFCH sub-channels), but the UE can only send one bypass transmission at the same time at most, the UE determines that there may be 1 candidate bypass reception occasion on the slot n-K' ₁ and there may not be multiple candidate bypass reception occasions.

In another specific embodiment, the UE is configured to feed back the second HARQ-ACK feedback information to the base station as a transmitting end of the bypass data. The UE does not enable transmission at the symbol level, i.e. only at the subframe level is supported. Assuming that the UE sends the second HARQ-ACK feedback to the base station in slot n, determining the set of candidate bypass reception opportunities for the corresponding one of the resource pools comprises: the UE acquires a time slot time sequence set K ' ₁ associated with the resource pool, sequentially judges whether bypass transmission is possible on a time slot n-K ' ₁ according to all possible values of K ' ₁, and if so, counts the bypass resource corresponding to the time slot into a candidate bypass receiving opportunity set; assuming that the resource pool includes K frequency domain sub-channels (possibly at least one of a PSSCH sub-channel, a PSCCH sub-channel, PSFCH sub-channels), the UE determines that there may be K candidate bypass reception opportunities on slot n-K' ₁; or assuming that the resource pool includes K frequency domain sub-channels and there are at most P bypass transmission code division multiplexing on each sub-channel in each slot, then the UE determines that there may be K x P candidate bypass reception opportunities on slot n-K' ₁.

Optionally, the UE determines a set of candidate bypass reception opportunities, further comprising ordering all candidate bypass reception opportunities in the set by a predetermined criterion. Optionally, the predetermined criterion includes ascending at least one of BWP index, resource pool index, frequency domain index, time domain index, code domain index according to a predetermined order. For example, for a candidate set of bypass reception opportunities corresponding to 1 resource pool, the frequency domain index is first ascending and then the time domain index is ascending. For example, for a candidate bypass reception opportunity set corresponding to a plurality of BWP and a plurality of resource pools, the frequency domain index is first ascending, then the time domain index is ascending, then the resource pool is ascending, and then the BWP is ascending; or firstly, the frequency domain index is increased, then the resource pool is increased, then BWP is increased, and then the time domain index is increased.

Optionally, the UE generates a corresponding HARQ-ACK information bit for each candidate bypass reception occasion in the set of candidate bypass reception occasions, and combines all HARQ-ACK information bits into a HARQ-ACK semi-static codebook.

The method of generating HARQ-ACK information bits for one candidate bypass reception occasion is similar to that in the prior art or as in the first aspect. But allows the following differences to exist:

Optionally, the UE is feedback of the bypass transmission scheduled by the corresponding base station, or feedback of all the bypass transmissions of the UE (including the bypass transmission scheduled by the base station and the bypass transmission determined by the UE itself) according to HARQ-ACK feedback information (second HARQ feedback) reported to the base station.

Alternatively, if the HARQ-ACK feedback information (second HARQ feedback) reported to the base station is feedback of a corresponding base station scheduled bypass transmission, HARQ-ACK information bits corresponding to the actual HARQ-ACK feedback state are generated for candidate bypass reception occasions corresponding to the base station scheduled bypass transmission, and corresponding HARQ-ACK information bits (e.g., always ACK) are generated for other candidate bypass reception occasions according to predefined criteria instead of the actual HARQ-ACK feedback state.

Alternatively, if the HARQ-ACK feedback information (second HARQ feedback) reported to the base station is feedback for all bypass transmissions corresponding to the UE, HARQ-ACK information bits corresponding to the actual HARQ-ACK feedback state are generated for each candidate bypass reception occasion.

Fig. 5 schematically provides a specific embodiment. The UE does not enable transmission at the symbol level, i.e. only at the subframe level is supported. The UE reports HARQ-ACK feedback (second HARQ-ACK feedback) information corresponding to the bypass transmission to the base station in time slot 9, and uses the HARQ-ACK semi-static codebook corresponding to one resource pool. The UE acquires a time slot time sequence set K' ₁＝{7,8,9},K′₁ associated with the resource pool to indicate the number of time slots in a physical sense. The UE sequentially determines whether there is a possible bypass transmission on the slot n-K' ₁, including: k' ₁ = 7, slot 2 is configured for bypass, but slot 2 is used for transmission of synchronization signals and/or channels carrying bypass, and therefore cannot be used for bypass transmission as defined in the present embodiment; k' ₁ =8, slot 1 is not configured for bypass and therefore cannot be used for the bypass transmission defined in this embodiment; k' ₁ =9, slot 0 is configured for bypass and can be used for bypass transmission as defined in this embodiment. And the UE continuously determines the number of candidate bypass receiving opportunities on the time slot 0, and determines that the resource pool comprises 4 sub-channels in the frequency domain according to the configuration information of the resource pool, so that the UE determines that 4 candidate bypass receiving opportunities exist on the time slot 0. The UE sorts the candidate bypass receiving opportunities according to the ascending order of the frequency domain and then the ascending order of the time domain. The final set of candidate occasions determined by the UE is { a, b, c, d }. And the UE sequentially determines HARQ-ACK information bits for each candidate bypass receiving time, places the HARQ-ACK information bits in sequence and generates a HARQ-ACK semi-static codebook of bypass transmission.

K' ₁ is provided in FIG. 5 as a collection of values, which are provided by way of example. Another way is to judge according to a threshold, e.g. the UE assumes K '₂<K′₁<K′₃, and K' ₁ is a positive integer, and K '₂ and K' ₃ are values of higher layer configuration. In this approach, K '₂ may represent the minimum processing time for the UE to decode the bypass transmission (e.g., decode PSSCH or decode PSFCH) and generate the second HARQ-ACK feedback, and K' ₃ may represent the maximum delay allowed for the second HARQ-ACK feedback.

Optionally, the HARQ-ACK corresponding to the bypass transmission and the HARQ-ACK corresponding to the downlink transmission are multiplexed in the same codebook or sub-codebook.

The UE multiplexes the prior art and determines a set of candidate PDSCH reception opportunities. The UE may also determine a set of candidate bypass reception occasions for the BWP and/or resource pool activated for bypass in each serving cell corresponding to a given HARQ-ACK feedback time unit. The UE multiplexes the existing mechanism to generate corresponding HARQ-ACK information bits for each candidate PDSCH receiving opportunity in the candidate PDSCH receiving opportunity set, generates corresponding HARQ-ACK information bits for each candidate bypass receiving opportunity in the candidate bypass receiving opportunity set, and combines the two types of generated HARQ-ACK information bits to generate the HARQ-ACK semi-static codebook.

The method of determining the set of candidate bypass reception opportunities and generating the corresponding HARQ-ACK information bits for each candidate bypass reception opportunity in the set of candidate bypass reception opportunities by the UE is similar to the method described in the scenario where the HARQ-ACK corresponding to the bypass transmission and the HARQ-ACK corresponding to the downlink transmission use separate codebooks/subcodebooks, the main difference being that the two types of generated HARQ-ACK information bits are combined to generate the HARQ-ACK semi-static codebook.

Optionally, the UE determines a set of candidate bypass reception opportunities and determines a set of candidate PDSCH reception opportunities, and further includes jointly ordering all candidate reception opportunities in the two sets according to a predetermined criterion. Optionally, the predetermined criterion includes ascending at least one of BWP index, resource pool index, frequency domain index, time domain index, code domain index according to a predetermined order, further includes ordering bypass reception opportunities corresponding to the same at least one of the above indexes and determining candidate PDSCH reception opportunities according to a predetermined order between the downlink and the bypass. For example, for a candidate bypass reception opportunity set corresponding to 1 resource pool, when UE performs joint ordering, the UE performs ordering according to a predetermined order between downlink and bypass, then performs ascending according to frequency domain index, and then performs ascending according to time domain index.

Fig. 6 schematically provides a specific embodiment. And the UE determines that the candidate PDSCH receiving time and the candidate bypass receiving time exist on the time slot 0 and the time slot 1 according to the second HARQ-ACK reporting time and the time slot time sequence set respectively corresponding to the downlink and the bypass, as shown in fig. 4. The UE is firstly ordered according to a preset sequence between the descending and the bypass, then is ascending according to the frequency domain index, and finally is ordered according to the ascending of the time domain index to obtain candidate PDSCH receiving opportunities and candidate bypass receiving opportunities. The final set of candidate occasions determined by the UE are { dl_1, sl_a1, sl_b1, sl_c1, sl_d1, dl_2, sl_a2, sl_b2, sl_c2, sl_d2}. And the UE sequentially determines HARQ-ACK information bits for each candidate PDSCH receiving time and each candidate bypass receiving time, places the HARQ-ACK information bits in sequence and generates a HARQ-ACK semi-static codebook of bypass transmission.

In a third aspect of the present application, a semi-static codebook is used for HARQ-ACK feedback for corresponding bypass data on a bypass channel.

Note that, in the third aspect, the HARQ-ACK feedback is HARQ-ACK feedback information, and the HARQ-ACK semi-static codebook is a second HARQ-ACK semi-static codebook.

In this embodiment, the sending end UE (fourth UE) of the bypass data transmits the bypass data and/or the bypass control information SCI, and the receiving end UE (third UE) of the bypass data provides HARQ-ACK feedback information to the sending end UE. The HARQ-ACK Feedback information is transmitted on a bypass Channel, specifically a bypass physical Feedback Channel (PHYSICAL SIDELINK Feedback Channel, PSFCH), using a HARQ-ACK semi-static codebook. And the receiving end UE of the bypass data generates an HARQ-ACK semi-static codebook containing HARQ-ACK feedback information of the bypass transmission, and sends the HARQ-ACK semi-static codebook to the sending end UE of the bypass data. Optionally, the HARQ-ACK semi-static codebook is carried on PSFCH.

Similar to the second embodiment, the UE determines a set of candidate bypass reception opportunities for a given HARQ-ACK feedback time unit. In the bypass system, each bypass resource where there may be a bypass transmission is referred to as a candidate bypass reception occasion, and a set of candidate bypass reception occasions, that is, a set of all candidate bypass reception occasions corresponding to a given HARQ-ACK feedback time unit, is determined.

The generation of the HARQ-ACK semi-static codebook received by the corresponding psch and/or PSCCH carried on PSFCH by the receiving end UE of the bypass data comprises:

Determining PSFCH resources carrying bypass HARQ-ACK feedback information;

determining a candidate bypass reception occasion set;

and placing the generated HARQ-ACK information bits in sequence to generate the HARQ-ACK semi-static codebook corresponding to the bypass HARQ-ACK feedback information.

Optionally, the UE determines PSFCH resources carrying HARQ-ACKs according to a mapping relationship between PSSCH and/or PSCCH and PSFCH, or PSFCH resource information indicated in the PSSCH and/or PSCCH.

Alternatively, the UE determines the candidate set of bypass reception opportunities using a mechanism similar to that in embodiment two.

Optionally, the UE determines a set of candidate bypass reception opportunities according to PSFCH resources, including: the UE determines a set of candidate bypass reception opportunities corresponding to the BWP and/or resource pool according to the BWP and/or resource pool where PSFCH resources are located. Optionally, the method further comprises: based on PSFCH resources, it is determined that there may be bypass resources for PSSCH reception and/or PSCCH reception, each of which may be referred to as a candidate bypass reception occasion. Optionally, the method further comprises: and according to PSFCH resources, determining the range of the bypass resources corresponding to the candidate bypass receiving opportunity set and the size of the bypass resources corresponding to each candidate bypass receiving opportunity, and correspondingly determining the candidate bypass receiving opportunity set.

Optionally, each of the above bypass resources where PSSCH reception and/or PSCCH reception may exist is a resource of one time and frequency domain and/or code domain. Optionally, the code domain resource is used to distinguish a bypass UE that sends PSCCH and/or PSSCH on the same time-frequency resource, and the receiving end UE of the bypass data may determine the code domain resource based on at least one of an identity of the sending end UE (e.g. a source ID, an ID or index of the sending end UE within a UE group in multicast), and a specific bypass transmission parameter of the sending end UE. Optionally, the code domain resource is used to distinguish the bypass UE that sends PSFCH on the same time-frequency resource, and the receiving end UE of the bypass data may determine the code domain resource based on the identity of the sending end UE, the specific bypass transmission parameter related to the sending end UE, the identity of the receiving end UE (e.g. the target ID, the ID or index of the receiving end UE in the UE group in the multicast), and the specific bypass transmission parameter related to the receiving end UE.

Optionally, the range of bypass resources corresponding to the candidate bypass reception occasion set includes at least one of a time domain resource range, a frequency domain resource range, and a code domain resource range. Optionally, the bypass resource size corresponding to each candidate bypass reception occasion includes at least one of N1 slots or N2 symbols in the time domain, M subchannels in the frequency domain, and K codewords in the code domain.

Optionally, the UE determines a time domain resource range, including: a time slot time sequence set K '₁ associated with the resource pool is acquired, and a set of bypass time slots corresponding to the candidate bypass receiving opportunity set is determined according to the time slots n and K' ₁ where PSFCH is located in a similar method as in the second embodiment, and the set is a time domain resource range.

Optionally, K' ₁ is a high-level configuration, including direct and indirect configurations. Optionally, the indirect configuration includes the UE determining K' ₁ from PSFCH resource configuration derivatives. Alternatively, if PSFCH resource configurations include that PSFCH resources are periodically present in the time domain within the bypass resource pool and the period is K slots, then K' ₁ includes { Lmin, lmin+1, … lmin+k-1}. Wherein Lmin is used to indicate the latest one of the time slots in which HARQ-ACK information can be fed back in this PSFCH, and thus can be used to characterize the minimum delay of HARQ-ACK processing. Wherein, K' ₁ is taken as a value set, and comprises K time slots corresponding to the configuration of PSFCH resources. K' ₁ is f.

Optionally, the UE determines a candidate bypass reception opportunity set according to PSFCH resources, and further includes: and the UE determines candidate bypass receiving opportunities in each time slot in the time domain resource range, and a candidate bypass receiving opportunity set consists of candidate bypass receiving opportunities in all time slots in the time domain resource range. Optionally, the UE determines candidate bypass reception opportunities in each slot, including: the UE determines the total size of bypass resources existing in a time slot according to at least one of the frequency domain resource range and the code domain resource range of the candidate bypass receiving opportunity; and determining the number of bypass resources possibly used for bypass transmission, namely the number of candidate bypass reception opportunities, existing in one time slot according to at least one of the time domain granularity, the frequency domain granularity and the code domain granularity of the resources used for bypass transmission indicated in the configuration of the resources used for bypass transmission and the total size.

Optionally, the UE determines that the bypass resource size corresponding to each candidate bypass receiving opportunity includes 1 time slot in the time domain, M subchannels in the frequency domain, K codewords in the code domain, and the range of the bypass resource includes M0 subchannels in the frequency domain, K0 codewords in the code domain; the UE may accordingly determine that there are M0/mxk 0/K candidate bypass reception opportunities in each slot. If M0/M or K0/K is not an integer, an up-or down-rounding of M0/M or K0/K is used herein.

Optionally, the UE determines whether there is more than one bypass resource used for bypass transmission in a time slot and/or the maximum number of bypass resources used for bypass transmission in a time slot according to the number or maximum number of received or simultaneously received bypass transmissions in each time slot corresponding to the UE capability. For example, if the UE determines that there are M0/mxk 0/K candidate bypass reception opportunities in each slot and the UE capability corresponds to receiving X bypass transmissions at maximum in each slot, the UE eventually determines that the number of candidate bypass reception opportunities present in each slot is the minimum of M0/mxk 0/K and X.

Optionally, the UE determines the number of time domain granularities of resources used for the bypass transmission according to the UE capability and whether the BWP and/or the resource pool corresponding to the candidate bypass reception occasion set is configured to enable the transmission at the symbol level, and if so, the configuration of the transmission at the symbol level, and accordingly determines the candidate bypass reception occasion set, similar to the second embodiment.

Optionally, the UE determines a frequency domain resource range including candidate bypass reception opportunities according to PSFCH resource configuration derivation. Optionally, if the PSFCH resource configuration includes that PSFCH resources periodically exist in the frequency domain within the bypass resource pool and the period is K subchannels or RBs, the frequency domain resource range of the candidate bypass reception occasion includes K subchannels or RBs.

Optionally, if the PSFCH resource configuration acquired by the UE includes that each PSFCH is associated with X PSSCH resources and/or PSCCH resources, the UE determines that the candidate bypass reception occasion set corresponding to the PSFCH resource includes X PSSCH resources and/or PSCCH resources corresponding to the PSFCH resource; optionally, every N PSSCH resources and/or PSCCH resources are a candidate bypass reception occasion, where n=1 or N is a positive integer.

Optionally, the UE generates HARQ-ACK feedback information for each candidate bypass reception occasion, and if PSCCH and/or PSSCH are not successfully decoded on one candidate bypass reception occasion, the generated HARQ-ACK feedback information is NACK; otherwise, the generated information is ACK. Specific details, including details of how the TB-level and CBG-level feedback is generated, are similar to those of the first/second embodiments and the prior art, and will not be repeated.

Some typical scenarios to which the method in the third aspect is applicable are briefly exemplified below.

Scene one: the transmitting end UE of the bypass data transmits a plurality of PSSCHs in parallel by using a plurality of HARQ processes in the PSSCHs; parallel transmission means that after the nth PSSCH is transmitted using the nth HARQ process, if the (n+1) th HARQ process is available before receiving the corresponding HARQ-ACK feedback information, the (n+1) th PSSCH is transmitted using the (n+1) th HARQ process without waiting for the HARQ-ACK feedback information of the nth PSSCH. In this scenario, the receiving UE may carry feedback information corresponding to multiple PSSCHs in one HARQ-ACK feedback message, where feedback information of different PSSCHs is indicated by different bits in the HARQ-ACK codebook. And the transmitting end UE correspondingly extracts the HARQ-ACK information bits from the HARQ-ACK codebook according to the self-used transmission resources.

Scene II: the UE is determined by PSFCH configuration of a resource pool in which multiple PSSCHs and/or PSCCHs are mapped to the same or same set PSFCH of resources. For example, PSFCH configuration information indicates that PSFCH exists periodically every N slots in the time domain and every M subchannels in the frequency domain, then every mxn PSSCHs and/or PSCCHs map to the same or the same set of PSFCH resources; the set PSFCH of resources herein refers to the set PSFCH of resources that share the same time-frequency resources, code division multiplexing. In this scenario, the receiving UE may need to feed back HARQ-ACK feedback information corresponding to the mxn PSCCHs and/or PSCCHs in PSFCH; the feedback information may correspond to one or more sender UEs. Therefore, the receiving UE may carry feedback information corresponding to multiple PSSCHs/PSCCHs in one HARQ-ACK feedback message, where feedback information of different PSSCHs/PSCCHs is indicated by different bits in the HARQ-ACK codebook. Each possible transmitting UE extracts HARQ-ACK information bits from the HARQ-ACK codebook according to its own used transmission resources.

For scenario two, since HARQ-ACK information fed back by the receiving end UE of the bypass data may need to be received by the transmitting end UE of the plurality of bypass data, the information carrying the HARQ-ACK should be similar to a mechanism in broadcasting or multicasting. Thus, optionally, the UE sends PSFCH carrying the HARQ-ACK semi-static codebook, including the UE performing power control according to information of more than one UE, and/or the UE performing power control according to downlink loss, and/or the UE performing power control according to the same mechanism as broadcast; optionally, the more than one UE includes a transmitting UE that receives an actual PSSCH and/or PSCCH corresponding to the HARQ-ACK semi-static codebook; optionally, the information includes at least one of bypass loss, bypass layer 1 and/or layer 3RSRP, bypass CSI. The method can ensure that PSFCH power control gives consideration to a plurality of perceived data transmitting end UE and/or potential non-perceived data transmitting end UE, so that the transmitting end UE is more likely to receive feedback information borne on PSFCH.

In a fourth aspect of the present application, a dynamic codebook is used for HARQ-ACK feedback of corresponding bypass data on a bypass channel.

The HARQ-ACK feedback in the fourth aspect is HARQ-ACK feedback information, and the HARQ-ACK dynamic codebook is a second HARQ-ACK dynamic codebook.

In this embodiment, the sending end UE (fourth UE) of the bypass data transmits the bypass data and/or the bypass control information SCI, and the receiving end UE (third UE) of the bypass data provides HARQ-ACK feedback information to the sending end UE. The HARQ-ACK Feedback information is transmitted on a bypass Channel, specifically a bypass physical Feedback Channel (PHYSICAL SIDELINK Feedback Channel, PSFCH), using a dynamic codebook of HARQ-ACKs. And the receiving end UE of the bypass data generates an HARQ-ACK dynamic codebook containing HARQ-ACK feedback information of the bypass transmission and sends the HARQ-ACK dynamic codebook to the sending end UE of the bypass data. Optionally, the HARQ-ACK dynamic codebook is carried on PSFCH.

The generation of the HARQ-ACK dynamic codebook received by the corresponding psch and/or PSCCH carried on PSFCH by the receiving end UE of the bypass data comprises:

Determining PSFCH resources carrying bypass HARQ-ACK feedback information;

C-DAI and/or T-DAI corresponding to the bypass HARQ-ACK feedback information are determined;

And generating an HARQ-ACK dynamic codebook corresponding to the bypass HARQ-ACK feedback information based on the C-DAI and/or the T-DAI and the HARQ-ACK information bit.

Optionally, the C-DAI and/or T-DAI is indicated in the SCI sent by the sender UE of the bypass data.

Similar to the embodiment of the first aspect, the receiving UE transmitting PSFCH bypass data generates a HARQ-ACK dynamic codebook based on the acquired C-DAI and/or T-DAI information. However, in an embodiment of the first aspect, the C-DAI and/or T-DAI information is indicated by the base station to the bypass UE, and in an embodiment of the fourth aspect, the C-DAI and/or T-DAI information is indicated by the transmitting UE in the bypass control information SCI; in the embodiment of the first aspect, the HARQ-ACK information reported to the base station may be generated based on the HARQ-ACK information of the receiving end UE of the bypass data or generated according to the actual bypass receiving state, and may include DTX, but in the embodiment of the fourth aspect, the HARQ-ACK information generated by the bypass UE and fed back to the transmitting end UE of the data is generated directly according to the actual receiving state on the bypass, and does not include DTX.

The receiving end UE of the bypass data generates a dynamic codebook of HARQ-ACK based on the actual state of PSCCH and PSSCH decoding and C-DAI and/or T-DAI information indicated in the received SCI. The overall mechanism in the embodiments of the fourth aspect, and in particular the principle of generating HARQ-ACK dynamic codebooks from C-DAIs and/or T-DAIs, is substantially similar to that in the embodiments of the first aspect.

Optionally, the following differences are allowed:

In embodiments of the first aspect, the UE typically assumes that only one base station's schedule is received; however, in the embodiment of the fourth aspect, the receiving end UE bypassing the data may need to receive the data from multiple sending end UEs, so that the HARQ-ACK dynamic codebook needs to be generated for each sending end UE according to the C-DAI and/or T-DAI indicated by the sending end UE. Further, in an embodiment of the fourth aspect, the receiving end UE of the bypass data may generate different HARQ-ACK codebooks based on at least one of the following information differences, respectively: the identity of the UE indicating the C-DAI and/or T-DAI (including at least one of UE ID, UE source ID, group ID of the group in which the UE is located, ID/index of the UE within the group), TB/CBG level HARQ-ACK feedback, CBG configuration, unicast/multicast/broadcast, parameters characterizing traffic priority (e.g. PPPP, qoS). Taking the group ID of the group where the UE is in the information as an example, when the group IDs corresponding to the bypass transmission are different, the receiving end UE generates different HARQ-ACK codebooks; otherwise, when the group IDs corresponding to the bypass transmission are the same, the receiving end UE generates the same HARQ-ACK codebook; the method may also be understood as the UE generating one HARQ-ACK codebook for the bypass transmission corresponding to each group ID. Optionally, the difference of the at least one item of information also includes that the at least one item of information belongs to a different section. Taking QoS in the above information as an example, assuming that the QoS has a value of 1-16 and is divided into two intervals of 1-8 and 9-16 according to a predefined criterion, the UE generates respective HARQ-ACK codebooks for the bypass transmissions corresponding to QoS in different intervals, respectively.

A typical scenario in which the third aspect is applicable is similarly applicable to the fourth aspect, and the advantageous effects thereof will not be repeated. The semi-static codebook in the third aspect and the fourth aspect can better feed back the transmission on a large predetermined bypass resource compared with the dynamic codebook, and the indicated information amount is larger, but if the indicated large-scale bypass resource has limited transmission, the cost waste can be caused; the dynamic codebook can feed back for specific transmission, has relatively small overhead and is beneficial to improving the flexibility of the system.

Optionally, in all embodiments of the present application, the generation of HARQ-ACK information corresponding to the bypass transmission of the configured bypass grant schedule; if the sending end UE determines that the bypass data is not actually sent on one PSSCH of the configured bypass grant schedule, the HARQ-ACK information corresponding to the PSSCH generated by the sending end UE is ACK.

Optionally, if the transmitting UE is configured not to report ACK and/or is configured to report NACK and/or DTX only, the transmitting UE does not report HARQ-ACK information corresponding to the PSSCH.

The typical application scenario of the method is that the transmitting end UE has no data to be transmitted in the UE buffer memory on the PSSCH of the configured bypass authorized scheduling. At this time, the UE does not actually send the PSSCH, and accordingly, does not receive HARQ-ACK feedback (first HARQ-ACK feedback) provided by the receiving end of the bypass data, and therefore, cannot generate HARQ-ACK (second HARQ-ACK feedback) information for reporting to the base station according to the first HARQ-ACK feedback. At this time, in order to avoid that the base station unnecessarily schedules retransmission resources for the transmitting UE, the transmitting UE should report an ACK, and the base station correspondingly understands the ACK as not having to schedule retransmission resources for the PSSCH.

Further, for the third and fourth aspects, additional enhancements in multicast feedback may also be continued to be considered. Multicast feedback in an NR V2X system may support different receiving end UEs in the same group to transmit HARQ-ACK feedback in a form of code division multiplexing on the same time-frequency resource. Therefore, if the PUCCH format 2 of the related art is used to carry the HARQ-ACK codebook, the performance of the PUCCH format 2 after code division multiplexing needs to be considered. According to the discussion in the NR unlicensed band characteristics at present, when the frequency domain resource for carrying PUCCH format 2 is sufficiently large, a plurality of PUCCH formats 2 may be code division multiplexed in an OCC-like form, which does not have a serious influence on the performance of PUCCH format 2 in this scenario. Thus, whether to enable the HARQ-ACK codebook for multicast may be determined based on the size of PSFCH frequency domain resources.

Optionally, the UE dynamically determines to enable or disable the HARQ-ACK codebook for feedback of the bypass multicast traffic on the bypass channel and/or on the uplink channel; optionally, the UE determines to enable the HARQ-ACK codebook for the feedback if the frequency domain size of the channel for carrying feedback of the bypass multicast service is greater than or equal to a given threshold, and/or determines to disable the HARQ-ACK codebook for the feedback if the frequency domain size of the channel for carrying feedback of the bypass multicast service is less than or equal to a given threshold. Optionally, the given threshold is configured/defined for different types of channels (e.g., uplink channel/bypass channel) respectively.

In a specific embodiment, the UE determines the corresponding PSFCH resources according to PSCCH and/or PSCCH resources used by the bypass multicast service, and/or information indicated in the SCI, and/or PSFCH configurations of the bypass resource pool in which the service is located; whether to enable the HARQ-ACK codebook is determined according to whether the PSFCH resources are greater than a given threshold N subchannels or N RBs in the frequency domain.

When generating the class 1 HARQ-ACK codebook for bypass transmission, since the codebook is reported to the base station by the transmitting end UE, reflecting the HARQ-ACK information corresponding to the PSSCH actually transmitted by the transmitting end UE, and the transmitting end UE cannot transmit multiple bypass transmissions on one time domain resource (e.g., one slot) at the same time, a preferred method is that, for the class 1 codebook for bypass transmission, there is one candidate bypass reception opportunity on each time domain resource in one resource pool. If the UE is configured with multiple resource pools, there is one candidate bypass reception opportunity on each time domain resource in a different resource pool, or different resource pools share the same candidate bypass reception opportunity.

Alternatively, the time domain resource corresponds to the time domain resource granularity of the bypass system, e.g. a time slot when the bypass system only supports transmission at the time slot level, i.e. a time slot is not further divided into smaller time units for a plurality of bypass transmissions. The time domain resource is one or more symbols when the bypass system supports symbol-level transmission.

In generating the class 2 HARQ-ACK codebook for bypass transmissions, if the UE is configured with multiple bypass resource pools, the DAIs corresponding to each of the multiple bypass resource pools may be counted separately or jointly. For the respective counts, the UE independently calculates { C-DAI, T-DAI } for each resource pool when generating a class 2 codebook; and generates a class 2 codebook for each resource pool based on its DAI, or generates a subcodebook for each resource pool based on its DAI and sequences the subcodebooks of all resource pools to generate a class 2 codebook. For the latter, the method of arranging in sequence includes, when the UE is configured with a plurality of bypass resource pools, obtaining an index of each bypass resource pool, and the UE arranging the subcodebooks of each resource pool accordingly according to the indexes of the bypass resource pools. For joint counting, the UE, when generating a class 2 codebook, jointly calculates { C-DAI, T-DAI } for each resource pool and generates a class 2 codebook for all the resource pools based on their DAIs. Optionally, if the UE acquires a plurality of bypass grants on one time domain resource, the plurality of bypass grants indicating transmissions in different resource pools, the UE calculating DAI values respectively indicated in the plurality of bypass grants in a predetermined order; wherein the predetermined order includes ordering by cell and/or ordering by index of the resource pool.

In one specific example, the DAIs corresponding to each of the plurality of bypass resource pools are counted separately. The UE acquires 2 bypass grants a and B, each of which schedules one bypass transmission in resource pool 1 and resource pool 2, respectively, { C-DAI, T-DAI } indicated in the bypass grants a and B are {1,1} and {2,2} respectively. Since the DAIs are counted separately, the UE considers { C-DAI, T-DAI } corresponding to the bypass codebook corresponding to the resource pool 1 to be {1,1}, and correspondingly, the generated class 2 codebook has a length of 1 bit, and the HARQ-ACK information bit of the bypass transmission scheduled by the bypass grant a is the 1 st bit in the codebook. The UE considers { C-DAI, T-DAI } corresponding to the bypass codebook corresponding to the resource pool 2 to be {2,2}, and correspondingly, the generated class 2 codebook length is 2 bits, and the HARQ-ACK information bit of the bypass transmission scheduled by the bypass grant 2 is the 2 nd bit in the codebook.

In another specific example, the DAIs corresponding to each of the plurality of bypass resource pools are jointly counted. The UE acquires 2 bypass grants a and B, each of which schedules one bypass transmission in resource pool 1 and resource pool 2, respectively, { C-DAI, T-DAI } indicated in the bypass grants a and B are {1,1} and {2,2} respectively. Since the DAI is jointly counted, the UE-generated class 2 codebook is 2 bits in length, the HARQ-ACK information bit of the bypass transmission scheduled by the bypass grant 1 is bit 1 in the codebook, and the HARQ-ACK information bit of the bypass transmission scheduled by the bypass grant 2 is bit 2 in the codebook. In this example, if the bypass grants a and B are obtained on the same time domain resource, this example further includes the UE calculating the DAI of each resource pool in the resource pool index order, i.e., first calculating the DAI {1,1} of resource pool 1 and then calculating the DAI {2,2} of resource pool 2. Optionally, after acquiring the PUCCH resource corresponding to the bypass transmission scheduled by the base station, if it is determined that the transmission on the resource collides with other uplink, downlink or bypass transmission (collided), the bypass UE needs to resolve the collision. The PUCCH resources corresponding to the bypass transmission include PUCCH resources for reporting whether the bypass transmission is successful, and the transmission on the resources includes PUCCH or UCI carrying HARQ-ACK information of the bypass transmission. Wherein the PUCCH transmission on the resource is in conflict with other uplink, downlink or bypass transmissions, including the resource overlapping or partially overlapping in the time domain with resources used by other uplink, downlink or bypass transmissions; optionally, the method further includes the UE not having the capability to simultaneously transmit the conflicting plurality of transmissions and/or the UE not having the capability to simultaneously transmit and receive the conflicting plurality of transmissions.

The method for resolving the conflict comprises at least one of the following: multiplexing the conflicting transmissions on the same resource or in one transmission; terminating (drop) at least one of the conflicting transmissions; an un-terminated one of the conflicting transmissions is sent and/or received in a manner that is not in conflict. Optionally, in the present example as well as in the following examples, the termination of at least one of the conflicting transmissions may also be replaced with a delay (postpone).

Optionally, the method for resolving the conflict includes: according to a predetermined condition, N non-terminated transmissions in the conflicting transmissions are sent and/or received in a manner when no conflict occurs; and terminate (drop) transmission and/or reception of other ones of the conflicting transmissions. Wherein the value of N is fixed/(pre) defined for the/(pre) configuration and/or determined according to predetermined conditions. Wherein the predetermined condition includes at least one of: the priority of the corresponding traffic scenario (e.g., URLLC scenario, eMBB scenario, bypass public safety (publicsafety) scenario, bypass non-public safety scenario, bypass commercial (communication) scenario), the priority of the information carried by the transmission (e.g., data priority indicated by QoS, priority of UCI/DCI information carried by the transmission), the priority of the channels transmitted (e.g., downlink channel, uplink channel, priority between bypass channels, and further channel priorities such as PUCCH, PUSCH, PDCCH, PSSCH, etc., specific uplink/downlink/bypass channel priorities), the capability of the UE to support multiple simultaneous transmissions (simultaneoustransmissions), the duplex capability of the UE (e.g., half duplex/full duplex).

Alternatively, if a transmission corresponds to more than one priority, the priority of the transmission is determined based on the highest priority, or the lowest priority, or an average of the priorities. For example, if a certain transmission is a HARQ-ACK codebook of bypass data and the codebook carries HARQ-ACK information of a plurality of bypass TBs, the priority of the transmission is determined according to the minimum value (corresponding to the highest priority) or the maximum value (corresponding to the lowest priority) or the average value of QoS corresponding to the plurality of bypass TBs.

Alternatively, the value of N is fixed to 1. The bypass UE resolves the conflict between the transmission on the PUCCH resource corresponding to the bypass transmission scheduled by the base station and other uplink/downlink/bypass transmissions, including the bypass UE sending and/or receiving the transmission with the highest priority of 1 among the conflicting transmissions in a manner when no conflict occurs, and terminating other transmissions.

In one specific example, the priority between different traffic scenarios is URLLC above eMBB above bypass transmission. If the bypass UE determines that more than one transmission needs to be sent and/or received on a particular resource (e.g., a certain slot/symbol), the bypass UE:

Determining whether there is a transmission corresponding to URLLC of the more than one transmission, e.g., data corresponding to URLLC or control signaling, the control signaling further including HARQ-ACK information corresponding to URLLC and scheduling information corresponding to URLLC; if there is a transmission corresponding to URLLC, further determining to send/receive the highest priority one of the transmissions corresponding to URLLC and terminating other transmissions on the particular resource;

Otherwise, if there is no transmission corresponding to URLLC, the UE continues to determine whether there is a transmission corresponding to eMBB, such as data corresponding to eMBB or control signaling, which further includes HARQ-ACK information corresponding to eMBB and scheduling information corresponding to eMBB, of the more than one transmission; if there is a transmission corresponding to eMBB, further determining to send/receive the highest priority one of the transmissions corresponding to eMBB and terminating other transmissions on the particular resource;

Otherwise, if there is no transmission corresponding to eMBB, the UE continues to determine the priority of the more than one transmission, and further determines to send/receive the highest priority one of the more than one transmission, and terminates other transmissions on the particular resource; for example, if the more than one transmission are all bypass transmissions, the UE determines the transmission with the smallest transmit/receive QoS value based on the QoS parameters of the more than one transmission and terminates other transmissions on the particular resource.

In the above example, all traffic in a given traffic scenario has a lower priority than or higher priority than another given traffic scenario, e.g., any eMBB traffic has a lower priority than any URLLC traffic and has a higher priority than any bypass traffic. In another example, the priority of any URLLC traffic is higher than the priority of any eMBB/bypass traffic, but there is no absolute relationship between eMBB and the priority of bypass traffic. For example, a portion of bypass traffic (e.g., traffic in a bypass public safety scenario) has a higher priority than any eMBB traffic than other bypass traffic (e.g., traffic in a bypass non-public safety scenario/bypass business scenario); for example, the priorities of the bypass service and eMBB service are determined according to specific service types, and the UE ranks the priorities of different services according to the priority parameters corresponding to each service type.

In another specific example, the bypass transmission of priority URLLC > particular traffic priority among different traffic scenarios > eMBB > the remaining bypass transmissions. If the bypass UE determines that more than one transmission needs to be sent and/or received on a particular resource (e.g., a certain slot/symbol), the bypass UE:

Otherwise, if there is no transmission corresponding to URLLC, the UE continues to determine whether there is a bypass transmission of a specific service priority in the more than one transmission; if there is a bypass transmission of a specific service priority, further determining one of the bypass transmissions of the specific service priority with the highest priority, and terminating other transmissions on the specific resource; optionally, the bypass transmission belonging to the specific traffic priority is a bypass transmission with QoS below a given threshold;

Otherwise, if there is no bypass transmission of the specific traffic priority, the UE continues to determine whether there is a transmission corresponding to eMBB, such as data corresponding to eMBB or control signaling, which further includes HARQ-ACK information corresponding to eMBB and scheduling information corresponding to eMBB, in the more than one transmission; if there is a transmission corresponding to eMBB, further determining to send/receive the highest priority one of the transmissions corresponding to eMBB and terminating other transmissions on the particular resource;

The above examples are mainly used to illustrate the impact of different traffic scenarios and/or traffic types on priority decisions. Similarly, the channel type (e.g., data channel/control channel) as uplink/downlink/bypass channel may also be used to determine the priority of different transmissions. In a specific example, if the bypass UE determines that more than one transmission needs to be sent and/or received on a particular resource (e.g., a certain time slot/symbol), the UE first determines to send or receive on that resource based on the priorities of the uplink channel, the downlink channel, and the bypass channel, and/or the priorities of different channel types (e.g., the channel type priorities of PDSCH, PDCCH, PUCCH, PUSCH, PSSCH, PSCCH, PSFCH), and then determines to send or receive the highest priority transmission based on the priorities of different channel types and/or the priorities of traffic scenarios and/or the priorities of traffic types. In another specific example, the priority of each transmission is determined jointly according to the channel type used by the transmission, the service scenario corresponding to the transmission, and the service type corresponding to the transmission, and the UE determines, according to the priorities corresponding to the more than one transmission, one transmission with the highest sending priority or one transmission with the highest receiving priority. For example, the UE assumes that the PUCCH transmission corresponding to the bypass transmission has a lower priority than any transmission corresponding to URLLC and the PUCCH transmission corresponding to the bypass transmission having a QoS conforming to the first specific condition has a higher priority than UCI transmission eMBB (the UCI includes UCI carrying specific contents, for example, UCI carrying HARQ-ACK feedback information of PDSCH; or the UCI includes any UCI), and the PUCCH transmission corresponding to the bypass transmission having a QoS not conforming to the first specific condition or a QoS conforming to the second specific condition has a lower priority than UCI transmission eMBB. Wherein the first specific condition and/or the second specific condition comprises at least one of: qoS is any QoS within a given threshold. Wherein the UCI transmission of eMBB is a specific type of UCI (e.g., CSI, HARQ-ACK codebook, etc.), or the UCI transmission may be any type of UCI. The UE determines, based on the priority condition, one of the transmissions with the highest transmission priority or one of the transmissions with the highest reception priority.

Optionally, the value of N is configured or determined based on UE capabilities (UEcapability). If N is determined based on UE capabilities, optionally if the bypass UE determines to send the N highest priority transmissions of the conflicting transmissions, N is the maximum number of simultaneous transmissions that the UE capabilities can support. The method by which the UE selects the N highest priority transmissions is similar to when n=1, and the description will not be repeated. Optionally, if the bypass UE determines to send the N highest priority transmissions of the conflicting transmissions, further comprising: the UE selects 1 transmission with highest priority; then, the UE selects the second highest priority transmission from the other transmissions that can be sent simultaneously with the highest priority transmission, and so on until a total of N transmissions are selected, or the UE selects the remaining N-1 highest priority transmissions from the other transmissions that can be sent simultaneously with the highest priority transmission.

Optionally, if the bypass UE determines to transmit the N most prioritized transmissions of the conflicting transmissions, the UE further determines the transmit power of the N transmissions, including at least one of:

The UE determines N transmissions with highest priority, and determines the transmitting power according to a method when no conflict occurs; then, the UE judges whether the total transmitting power of the N transmissions exceeds the maximum transmitting power of the UE; if so, correspondingly scaling down the transmission power of each transmission until the total transmission power of the N transmissions does not exceed the maximum transmission power of the UE; the method has the advantages that the implementation complexity is relatively low, and power distribution is relatively fairly performed among N transmitted transmissions, so that the probability of successful reception of each transmission is relatively fairly ensured;

The UE selects 1 transmission with highest priority, and determines the transmitting power according to the method when no conflict occurs; then, the UE uses the remaining transmit power for other transmissions; specifically, the UE preferentially ensures that the transmission power of the transmission with the highest priority is the same as that of the transmission with no collision, and then uses the remaining transmission power for the remaining other transmissions, and so on; or, the UE determines whether the transmit power of the other N-1 transmissions except for the 1 highest priority transmission exceeds the remaining transmit power, and if so, scale down the transmit power of each transmission accordingly until the transmit power of the other N-1 transmissions does not exceed the remaining transmit power. The method has the advantages that the transmitting power of one transmission with the highest priority can be ensured not to be influenced by other transmissions, and the transmitting power of the transmission with the higher priority can be ensured to be less likely to be influenced by other transmissions with relatively lower priority, so that the probability of successful receiving of the service with the higher priority is protected.

Optionally, the method for resolving the conflict further comprises: if the conflicting transmissions include PUCCH and/or UCI, the conflicting PUCCH transmissions and/or UCI transmissions are multiplexed in the same PUCCH and/or UCI according to a predetermined condition. Optionally, the method for resolving the conflict further comprises: if the conflicting transmissions include PUCCH and/or UCI and further include PUSCH transmissions, multiplexing the conflicting PUCCH transmissions and/or UCI transmissions in the same PUCCH and/or UCI and/or carrying PUCCH and/or UCI (piggyback) on PUSCH according to a predetermined condition.

Wherein the predetermined condition includes at least one of: the information carried by the conflicting transmissions is of a specific type (e.g. any of HARQ-ACK information and CSI information), the conflicting transmissions carry the same type of information (e.g. all HARQ-ACK codebooks), the conflicting transmissions correspond to a specific traffic type or traffic scenario (e.g. any of eMBB scenarios and bypass scenarios), the total length after the conflicting transmissions are multiplexed does not exceed a given threshold, and the number of conflicting transmissions does not exceed a given threshold.

Multiplexing the conflicting PUCCH transmissions and/or UCI transmissions in the same PUCCH and/or UCI, specifically, including arranging HARQ-ACK codebooks carried in the conflicting PUCCH transmissions and/or UCI transmissions in the same PUCCH and/or UCI according to a predetermined criterion. The predetermined criteria includes at least one of: arranging according to the priority of the HARQ-ACK codebook; the priority arrangement of PUCCH and/or UCI carrying HARQ-ACK code book is carried; arranging according to the priority of data transmission corresponding to the HARQ-ACK codebook; arranging according to the priority of the resource type of the data transmission corresponding to the HARQ-ACK codebook; and arranging the resource positions of the data transmission corresponding to the HARQ-ACK codebook.

The priorities in the above criteria include the priorities used by the UE to determine the N highest priority transmissions in the conflicting transmissions in the above example, and also include the priorities indicated by the specific parameters and/or the priorities predetermined/configured by the specific criteria. As to the latter, a specific example is that the priorities of the different HARQ-ACK codebooks are predetermined/configured according to a specific criterion, for example, the priority of the HARQ-ACK codebook corresponding to URLLC is highest, the priority of the HARQ-ACK codebook corresponding to the bypass transmission where the traffic priority satisfies a predetermined condition (for example, when the traffic priority is indicated by the QoS parameter, the QoS is smaller than a specific threshold value) is next higher, the priority of the HARQ-ACK codebook corresponding to eMBB is next higher, and the priority of the HARQ-ACK codebook corresponding to the other bypass transmission is next lowest. Further, priorities of the different TB-level codebooks and CBG-level codebooks are predetermined/configured according to specific criteria, e.g., HARQ-ACK codebook priorities include URLLC corresponding TB-level codebook > URLLC corresponding CBG-level codebook > eMBB corresponding TB-level codebook > eMBB corresponding CBG-level codebook > bypass transmission corresponding TB-level codebook > bypass transmission corresponding CBG-level codebook.

The method comprises the steps of arranging according to the priority of the resource type of data transmission corresponding to the HARQ-ACK codebook, wherein the arrangement comprises the specific channel type arrangement occupied by uplink/downlink resources and the resource of data transmission corresponding to the HARQ-ACK codebook according to the resource of data transmission corresponding to the HARQ-ACK codebook; the resource position arrangement of the data transmission corresponding to the HARQ-ACK codebook is performed according to the time sequence and/or the frequency domain position sequence of the resource position of the data transmission corresponding to the HARQ-ACK codebook. The method includes arranging according to the priority of the resource type of the data transmission corresponding to the HARQ-ACK codebook and/or arranging according to the resource position of the data transmission corresponding to the HARQ-ACK codebook, and further comprises arranging according to the priority and/or the resource position of the resource type of a specific data transmission, for example, arranging according to the priority and/or the resource position of the resource type of the last or first data transmission when the HARQ-ACK codebook corresponds to more than one data transmission.

In this example, the prioritization for arranging the HARQ-ACK codebook may also be understood as an order for arranging the HARQ-ACK codebook, e.g., arranging the codebook according to the prioritization of different HARQ-ACK codebooks predetermined/configured according to a specific criterion is equivalent to arranging the codebook according to the order of different HARQ-ACK codebooks predetermined/configured according to a specific criterion.

Optionally, arranging HARQ-ACK codebooks carried in the conflicting PUCCH transmission and/or UCI transmission in the same PUCCH and/or UCI according to a predetermined criterion, further including: when certain conditions are met, using a first set of priorities of a configured/preconfigured HARQ-ACK codebook; otherwise a second set of priorities of the configured/preconfigured HARQ-ACK codebook is used.

Wherein the specific conditions include: the difference between the sizes (or bit numbers) of the HARQ-ACK codebooks carried in the conflicting PUCCH transmissions and/or UCI transmissions is greater than or equal to a threshold.

Wherein the first set of priorities may be determined based on the traffic type (e.g., URLLC and eMBB) of the uplink/downlink traffic corresponding to the HARQ-ACK codebook and based on the priority of the bypass traffic (e.g., the priority indicated by QoS), and the second set of priorities may be determined based on the traffic type of the uplink/downlink traffic corresponding to the HARQ-ACK codebook and whether the corresponding traffic is bypass traffic. For example, the first set of priorities includes: codebook > URLLC corresponding to bypass traffic having a priority belonging to a first threshold interval and codebook > eMBB corresponding to bypass traffic having a priority belonging to a second threshold interval; wherein the first threshold interval/the second threshold interval/the third threshold interval may be indicated by an interval of a value of QoS. For example, the second set of priorities includes: URLLC codebook > eMBB codebook > bypass service codebook; or the second set of priorities includes: URLLC codebook > codebook corresponding to bypass traffic > codebook corresponding to eMBB.

In the bypass communication system, when the UE acquires the bypass resource scheduled by the base station, the priority of the bypass service transmitted on the bypass resource may not be reported to the base station. Therefore, when the base station schedules the HARQ-ACK codebook of the corresponding bypass service and the HARQ-ACK codebook of the corresponding uplink service, which are reported by the UE, on the same time domain resource, it may not be possible to determine which codebooks the UE has reported, and blind detection needs to be performed on the received codebooks. In this scenario, the base station may schedule different other parameters for each HARQ-ACK codebook, including other parameters than the time domain resource location, such as frequency domain resources, code domain resources (e.g., cyclic shift CYCLIC SHIFT), PUCCH format, among the parameters indicated when scheduling PUCCH. Therefore, the method can be effective under the scene that the base station determines the type of the codebook reported by the UE and under the scene that the base station cannot determine the type of the codebook reported by the UE and blind detection is needed.

After receiving the bypass data channel, the bypass UE determines a bypass resource for transmitting the HARQ-ACK information according to the identity of the transmitting end UE and the identity of the receiving end UE if the HARQ-ACK information needs to be fed back to the transmitting end UE of the data on a bypass. Wherein the bypass resource for transmitting the HARQ-ACK information includes at least one of a time domain resource, a frequency domain resource, and a code domain resource; the code domain resources include a cyclic shift (CYCLIC SHIFT) of the sequence used by the HARQ-ACK. One specific example is as follows:

UE determines PSFCH the index of the resource as Wherein P _ID is the physical layer source ID provided in SCI format 0_2 of the scheduling PSSCH, M _ID is 0 or M _ID is the identity indicated by the upper layer for the UE to receive the PSSCH; wherein the PSFCH resources are used to respond to the received PSFCH transmissions of the PSSCH.

M _ID is an identity indicated by a higher layer for the UE to receive the PSSCH, and is mainly applied to multicast scenarios. The main use of the identity identifier indicated by the higher layer for the UE to receive the PSSCH is that, when feedback is provided for the multicast service, different receiving end UEs have different intra-group IDs, and correspondingly, the indexes of different PSFCH resources are determined, so that the conflict caused by the transmission of HARQ-ACK feedback of different receiving end UEs of the multicast service on the same resource is avoided. M _ID is 0, which is mainly used in a unicast scenario, in which a service has only one receiving end UE, so that a collision problem among a plurality of receiving end UEs is not required to be considered, an intra-group ID is not required to be introduced, and the complexity of the system can be reduced by using a fixed value of M _ID.

In view of the above motivation, in the above procedure, the method for determining the identity of the receiving UE (e.g. M _ID in the above example) by the UE includes that the UE determines the identity of the receiving UE according to the service type. For example, when the service type is HARQ-ACK feedback type 1 (also a feedback type in which the UE only feeds back NACK information and does not feed back ACK information) of unicast or multicast, the UE determines that M _ID is 0; when the service type is multicast HARQ-ACK feedback type 2 (also feedback type of the UE feeding back ACK or NACK information), the UE determines that M _ID is the identity indicated by the higher layer for the UE to receive the PSSCH. Therefore, if the receiving end UE serving as the bypass data channel needs to feed back HARQ-ACK information to the bypass transmitting end UE, the receiving end UE needs to identify a service type corresponding to bypass reception associated with the feedback information, and further determines an identity of the receiving end UE according to the service type.

The UE determines the traffic type based on at least one of the following methods: determining the service type through SCI format; determining a service type through a physical layer ID; determining a service type through a specific domain explicitly indicated in physical layer signaling; the traffic type is determined by a specific domain indicated explicitly or implicitly in higher layer signaling.

Optionally, the SCI includes an SCI (1 ^st stage SCI) of stage 1 and an SCI (2 ^nd stage SCI), the SCI of stage 2 further including a format a and a format B; wherein format a is dedicated to multicast HARQ-ACK feedback type 1, possibly also for broadcast; format B is used for unicast and multicast HARQ-ACK feedback type 2 and possibly also for broadcast. The disabling of HARQ is indicated in SCI of level 1 or 2, indicating that the traffic type is broadcast; or indicate the enablement of HARQ, indicating that the traffic type is multicast or unicast. The service type is implicitly indicated in the SCI of level 2 by the physical layer ID or by a specific field indicated explicitly. The type of traffic is determined in the MAC signaling by a specific field, either explicitly or implicitly indicated, e.g. in the MAC header. Correspondingly, the UE determines that the service type is multicast HARQ-ACK feedback type 1 (or multicast HARQ-ACK feedback type 1/broadcast) or unicast/multicast HARQ-ACK feedback type 2/broadcast according to the received 2-order SCI format; the UE determines whether the service type is broadcast according to the HARQ enabling/disabling indicated in the received SCI; if the traffic type is unicast/multicast HARQ-ACK feedback type 2 and not broadcast, the UE further determines that the traffic type is unicast or multicast HARQ-ACK feedback type 2 based on the physical layer ID (e.g., the target ID (destination ID) indicated in the SCI), and/or the UE determines that the traffic type is unicast or multicast HARQ-ACK feedback type 2 based on the specific field explicitly indicated in the SCI, and/or the UE determines that the traffic type is unicast or multicast HARQ-ACK feedback type 2 based on MAC layer signaling (e.g., the field in the MAC header). After determining the service type, the UE determines M _ID as 0 when the service type is unicast or multicast HARQ-ACK feedback type 1, and determines M _ID as an identity for the UE to receive the PSSCH indicated by a higher layer when the service type is multicast HARQ-ACK feedback type 2.

In the above method for indicating service type, in order to reduce signaling overhead of SCI, one possible method is:

the UE determines that the service type is multicast HARQ-ACK feedback type 1 (or multicast HARQ-ACK feedback type 1/broadcast) or the service type is unicast/multicast HARQ-ACK feedback type 2/broadcast according to the SCI format; and determining whether the service type is broadcast according to the received HARQ enabling/disabling indicated in the SCI;

Then, if the UE determines that the service type is unicast/multicast HARQ-ACK feedback type 2, the UE further determines that the service type is unicast or the service type is multicast HARQ-ACK feedback type 2 according to the physical layer ID; if the service types cannot be distinguished according to the physical layer ID, for example, a unicast ID set and a multicast ID set configured to the physical layer by a higher layer overlap, and the target ID indicated in the received SCI belongs to the overlapping part of the two sets, the UE decodes the data and determines the service type according to the information indicated in the higher layer signaling.

The above method has an advantage in that since the UE can determine the traffic type through the SCI format, the HARQ enable/disable indication field, the physical layer ID, and/or the higher layer signaling, it is unnecessary to add a bit explicitly indicating the traffic type in the SCI, thereby reducing the size of the SCI format. The above method presents a potential risk when the UE fails to decode the PSSCH. When the PSSCH is not successfully decoded, the UE cannot determine the service type through the higher layer signaling, so if the UE determines that the service type is unicast/multicast HARQ-ACK feedback type 2, but cannot distinguish the service type according to the physical layer ID, the UE cannot distinguish whether the service type is unicast or multicast HARQ-ACK feedback type 2, and accordingly, the identity indicated by M _ID as 0 or M _ID as the higher layer for the UE to receive the PSSCH cannot be determined.

To cope with this problem, one possible method is that if the UE fails to decode the PSSCH and determines that the traffic type is unicast/multicast HARQ-ACK feedback type 2 and cannot distinguish the traffic type according to the physical layer ID, the UE determines M _ID to be 0.

The main advantage of the above method is that if the service type is unicast, the sending UE will monitor the PSFCH resource corresponding to M _ID being 0, that is, the method determines that M _ID is 0 and determines the correct PSFCH resource, and HARQ-ACK feedback will not be affected. If the service type is multicast HARQ-ACK feedback type 2, the transmitting UE will monitor PSFCH resources corresponding to M _ID (the M _ID is an identity indicated by a high layer and used for the UE to receive the PSSCH) of each receiving UE of each multicast service, and if M _ID of a certain receiving UE of the multicast service is 0, the transmitting UE can still receive NACK feedback on PSFCH resources corresponding to M _ID being 0; if M _ID of any receiving end UE of the multicast service is not 0, the transmitting end UE listens to PSFCH resources corresponding to M _ID of the receiving end UE (the M _ID is an identity for the UE to receive the PSSCH indicated by a higher layer) using the method, and because the receiving end UE actually transmits feedback information on PSFCH resources with M _ID being 0, the transmitting end UE considers that HARQ-ACK feedback information of the receiving end UE cannot be received. In the multicast HARQ-ACK feedback type 2, when the transmitting UE receives NACK information from any receiving UE or fails to receive HARQ-ACK information from any receiving UE, retransmission is triggered, so that the retransmission of the multicast HARQ-ACK feedback type 2 can be actually triggered correctly by using the method, that is, the HARQ-ACK feedback of the multicast HARQ-ACK feedback type 2 is not affected. Therefore, the method can still correctly trigger HARQ-ACK retransmission on the premise of controlling SCI overhead.

Similarly, another possible approach is: if the UE fails to decode the PSSCH and determines that the service type is unicast/multicast HARQ-ACK feedback type 2 and cannot distinguish the service type according to the physical layer ID, the UE determines that M _ID is the identity indicated by the higher layer for the UE to receive the PSSCH.

The main advantages of the method are similar to the former method, when the service type is multicast HARQ-ACK feedback type 2, the method selects correct PSFCH resources, so that HARQ-ACK feedback is not affected; when the service type is unicast, the sending end UE monitors PSFCH resources corresponding to M _ID as 0, so that HARQ-ACK information fed back by the receiving end UE using the method cannot be received, HARQ retransmission is triggered by lack of the HARQ-ACK information, and therefore HARQ-ACK feedback of unicast service is not affected. Therefore, the method can still correctly trigger HARQ-ACK retransmission on the premise of controlling SCI overhead.

Example two

Based on the same inventive concept as the previous embodiment, the embodiment of the present application further provides a first UE, and a schematic structural diagram of the first UE is shown in fig. 7, where the first UE50 includes a first processing module 501, a second processing module 502, a third processing module 503, a fourth processing module 504, and a fifth processing module 505.

A first processing module 501 configured to send a bypass transmission to a second UE;

A second processing module 502, configured to receive first HARQ-ACK feedback information sent by a second UE;

A third processing module 503, configured to generate second HARQ-ACK feedback information corresponding to the bypass transmission according to the received first HARQ-ACK feedback information;

a fourth processing module 504, configured to generate a first HARQ-ACK codebook including second HARQ-ACK feedback information;

a fifth processing module 505 is configured to report the first HARQ-ACK codebook to the base station.

the bypass transmission includes at least one of:

the obtaining a value of the maximum number of the coded block groups CBG contained in one transport block TB of bypass data included in the bypass transmission includes at least one of the following ways:

Sequencing the SPS PDSCH and the HARQ-ACK information bits corresponding to the configured bypass grant according to the same criterion, and sequentially adding the sequencing information bits into a first HARQ-ACK dynamic codebook;

Determining PUCCH resources carrying second HARQ-ACK feedback information;

Generating corresponding HARQ-ACK information bits for each candidate bypass reception opportunity and each candidate PDSCH reception opportunity in the candidate bypass reception opportunity set and the candidate PDSCH reception opportunity set;

predetermined criteria, including at least one of:

The details of the first UE provided in the embodiment of the present application, which are not described in detail, may refer to the codebook-based feedback method, and the beneficial effects that the first UE provided in the embodiment of the present application can achieve are the same as those of the codebook-based feedback method, which are not described herein.

The application of the embodiment of the application has at least the following beneficial effects:

Based on the same inventive concept as the previous embodiment, the embodiment of the present application further provides a third UE, and a schematic structural diagram of the third UE is shown in fig. 8, where the third UE60 includes a sixth processing module 601, a seventh processing module 602, and an eighth processing module 603.

A sixth processing module 601, configured to receive a bypass transmission sent by the fourth UE;

A seventh processing module 602, configured to generate a second HARQ-ACK codebook including HARQ-ACK feedback information corresponding to the bypass transmission, where the second HARQ-ACK codebook includes at least one of a second HARQ-ACK dynamic codebook and a second HARQ-ACK semi-static codebook;

an eighth processing module 603 is configured to send the second HARQ-ACK codebook to the fourth UE.

Optionally, generating the second HARQ-ACK semi-static codebook includes:

Determining PSFCH resources carrying bypass HARQ-ACK feedback information;

The details of the third UE provided in the embodiment of the present application may be referred to the codebook-based feedback method, and the beneficial effects that the third UE provided in the embodiment of the present application can achieve are the same as those of the codebook-based feedback method, which are not described herein.

and the HARQ-ACK feedback information corresponding to the bypass transmission is reported together or independently.

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions can be implemented in a processor of a general purpose computer, special purpose computer, or other programmable data processing method, such that the blocks of the block diagrams and/or flowchart illustration are implemented by the processor of the computer or other programmable data processing method.

Those of skill in the art will appreciate that the various operations, methods, steps in the flow, acts, schemes, and alternatives discussed in the present application may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed herein may be alternated, altered, rearranged, disassembled, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

The foregoing is only a partial embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present application, and such modifications and adaptations are intended to be comprehended within the scope of the present application.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising:

Receiving an authorization from the base station for a bypass configuration for the bypass transmission;

Transmitting a bypass signal to another terminal based on the authorization of the bypass configuration;

Generating HARQ-ACK information bits associated with a value of the first HARQ-ACK information upon receiving first hybrid automatic repeat request acknowledgement, HARQ-ACK, information associated with the bypass signal from the other terminal;

Generating HARQ-ACK information bits associated with a negative acknowledgement, NACK, in case the first HARQ-ACK information associated with the bypass signal is not received from the other terminal;

generating second HARQ-ACK information based on the HARQ-ACK information bits associated with the value of the first HARQ-ACK information or HARQ-ACK information bits associated with the NACK;

generating an HARQ-ACK codebook based on the second HARQ-ACK information; and

And reporting the HARQ-ACK codebook to the base station on an uplink channel.

2. The method of claim 1, wherein the HARQ-ACK information bit associated with the value of the first HARQ-ACK information or the HARQ-ACK information bit associated with the NACK is added to an end of a bypass dynamic codebook corresponding to a bypass dynamic grant.

3. The method of claim 1, wherein the reporting the HARQ-ACK codebook to the base station on the uplink channel comprises:

Reporting the HARQ-ACK codebook to the base station on a physical uplink control channel, PUCCH, in response to receiving the first HARQ-ACK information associated with the bypass signal, if a bypass signal of an grant schedule configured by the bypass is transmitted within a configured period of time.

4. The method of claim 1, wherein timing for transmitting the first HARQ-ACK information on PUCCH is determined based on an offset between a slot for receiving the first HARQ-ACK information and a slot for reporting the second HARQ-ACK information to the base station, and

Wherein the offset is indicated by at least one of downlink control information, DCI, or radio resource control, RRC, signaling.

5. The method of claim 1, wherein the HARQ-ACK codebook comprises at least one of a dynamic HARQ-ACK codebook or a semi-static codebook.

6. The method of claim 1, wherein the uplink channel comprises at least one of a physical uplink control channel, PUCCH, or a physical uplink shared channel, PUSCH.

7. The method of claim 6, wherein the reporting the HARQ-ACK codebook to the base station on the uplink channel comprises:

Reporting the HARQ-ACK codebook to the base station on at least one of PUCCH or PUSCH in case resources for transmitting HARQ-ACK information associated with a downlink signal received from the base station overlap with resources for reporting the HARQ-ACK codebook.

8. The method of claim 7, wherein a codebook for transmitting the HARQ-ACK information associated with a downlink signal and a HARQ-ACK codebook associated with the second HARQ-ACK information are separately generated, respectively.

9. A terminal in a wireless communication system, the terminal comprising:

A transceiver; and

At least one processor configured to:

Receiving, by the transceiver, authorization from a base station for a bypass configuration for bypass transmissions;

Transmitting, by the transceiver, a bypass signal to another terminal based on the authorization of the bypass configuration;

generating an HARQ-ACK codebook based on the second HARQ-ACK information; and

And reporting the HARQ-ACK codebook to the base station on an uplink channel through the transceiver.

10. The terminal of claim 9, wherein the HARQ-ACK information bit associated with the value of the first HARQ-ACK information or the HARQ-ACK information bit associated with the NACK is added to an end of a bypass dynamic codebook corresponding to a bypass dynamic grant.

11. The terminal of claim 9, wherein the at least one processor is further configured to:

12. The terminal of claim 9, wherein timing for transmitting the first HARQ-ACK information on the PUCCH is determined based on an offset between a slot for receiving the first HARQ-ACK information and a slot for reporting the second HARQ-ACK information to the base station, and

13. The terminal of claim 9, wherein the HARQ-ACK codebook comprises at least one of a dynamic HARQ-ACK codebook or a semi-static codebook.

14. The terminal of claim 9, wherein the uplink channel comprises at least one of a physical uplink control channel, PUCCH, or a physical uplink shared channel, PUSCH.

15. The terminal of claim 14, wherein the at least one processor is further configured to:

In case that resources for transmitting HARQ-ACK information associated with a downlink signal received from the base station overlap with resources for reporting the HARQ-ACK codebook,

Reporting the HARQ-ACK codebook to the base station on at least one of PUCCH or PUSCH.

16. The terminal of claim 15, wherein a codebook for transmitting the HARQ-ACK information associated with a downlink signal and a HARQ-ACK codebook associated with the second HARQ-ACK information are separately generated, respectively.

17. A method performed by a base station in a wireless communication system, the method comprising:

transmitting an authorization for bypass configuration for bypass transmission to the terminal;

receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook sent by the terminal on an uplink channel;

wherein the HARQ-ACK codebook is generated based on second HARQ-ACK information generated based on HARQ-ACK information bits associated with a value of the first HARQ-ACK information or HARQ-ACK information bits associated with NACK;

Wherein the HARQ-ACK information bit associated with the value of the first HARQ-ACK information is generated in case the first HARQ-ACK information associated with the bypass signal is received, and the HARQ-ACK information bit associated with the NACK is generated in case the first HARQ-ACK information associated with the bypass signal is not received.

18. The method of claim 17, wherein the HARQ-ACK information bit associated with the value of the first HARQ-ACK information or the HARQ-ACK information bit associated with the NACK is added to an end of a bypass dynamic codebook corresponding to a bypass dynamic grant.

19. The method of claim 17, wherein the receiving the HARQ-ACK codebook transmitted by the terminal on an uplink channel comprises:

in the case that a bypass signal of grant scheduling configured by the bypass is transmitted within a configured period of time, the receiving terminal transmits the HARQ-ACK codebook on a physical uplink control channel PUCCH in response to receiving the first HARQ-ACK information associated with the bypass signal.

20. The method of claim 17, wherein timing for transmitting the first HARQ-ACK information on PUCCH is determined based on an offset between a slot for receiving the first HARQ-ACK information and a slot for reporting the second HARQ-ACK information to the base station, and

21. The method of claim 17, wherein the HARQ-ACK codebook comprises at least one of a dynamic HARQ-ACK codebook or a semi-static codebook.

22. The method of claim 17, wherein the uplink channel comprises at least one of a physical uplink control channel, PUCCH, or a physical uplink shared channel, PUSCH.

23. The method of claim 22, wherein the receiving the HARQ-ACK codebook transmitted by the terminal on an uplink channel comprises:

In case that resources for transmitting HARQ-ACK information associated with a downlink signal received from the base station and resources for transmitting the HARQ-ACK codebook overlap, the HARQ-ACK codebook transmitted by the terminal on at least one of PUCCH or PUSCH is received.

24. The method of claim 23, wherein a codebook for transmitting the HARQ-ACK information associated with a downlink signal and a HARQ-ACK codebook associated with the second HARQ-ACK information are separately generated.

25. A base station in a wireless communication system, the base station comprising:

A transceiver; and

At least one processor configured to:

Transmitting, by the transceiver, authorization for bypass configuration for bypass transmission to a terminal;

Receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook sent by the terminal on an uplink channel through the transceiver;

26. The base station of claim 25, wherein the HARQ-ACK information bits associated with the value of the first HARQ-ACK information or HARQ-ACK information bits associated with the NACK are added to the end of a dynamic codebook by-pass corresponding to a by-pass dynamic grant.

27. The base station of claim 25, wherein the at least one processor is further configured to:

28. The base station of claim 25, wherein timing for transmitting the first HARQ-ACK information on PUCCH is determined based on an offset between a slot for receiving the first HARQ-ACK information and a slot for reporting the second HARQ-ACK information to the base station, and

29. The base station of claim 25, wherein the HARQ-ACK codebook comprises at least one of a dynamic HARQ-ACK codebook or a semi-static codebook.

30. The base station of claim 25, wherein the uplink channel comprises at least one of a physical uplink control channel, PUCCH, or a physical uplink shared channel, PUSCH.

31. The base station of claim 30, wherein the at least one processor is further configured to:

32. The base station of claim 31, wherein a codebook for transmitting the HARQ-ACK information associated with a downlink signal and a HARQ-ACK codebook associated with the second HARQ-ACK information are separately generated.