CN115707117A

CN115707117A - Method for determining feedback codebook and communication device

Info

Publication number: CN115707117A
Application number: CN202110902671.7A
Authority: CN
Inventors: 范巍巍; 张佳胤
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2023-02-17

Abstract

The application discloses a method for determining a feedback codebook and a communication device. In the method, first equipment receives first DCI sent by second equipment, wherein the first DCI is used for scheduling one or more first channels, the first DCI comprises first indication information, and the first indication information is used for indicating the number of binding units corresponding to the same feedback resource, which are sent to the first equipment from a first cell to a cell where the first DCI is located after all activated cells belonging to the same PUCCH group are arranged according to a preset sequence until the first DCI detection opportunity arrives; the first device sends feedback information to the second device, the feedback information is used for indicating whether all the first channels corresponding to each binding unit are successfully received, and the size and the mapping relation of a feedback codebook of the feedback information are determined according to the first indication information. The method is favorable for reducing the size of the feedback codebook and saving the uplink feedback resource.

Description

Method for determining feedback codebook and communication device

Technical Field

The present application relates to the field of wireless communications, and in particular, to a method and a communication apparatus for determining a feedback codebook.

Background

In a New Radio (NR) system, a base station may instruct, through Downlink Control Information (DCI) or Radio Resource Control (RRC) signaling, a terminal to receive a Physical Downlink Shared Channel (PDSCH) and feed back HARQ (hybrid automatic repeat request) information. Specifically, if the terminal device receives a dynamically scheduled PDSCH or a semi-statically scheduled PDSCH, or a release command of semi-static PDSCH scheduling (sent through DCI) in a slot (slot) n, the terminal device needs to perform HARQ feedback on the received release command (DCI) of the PDSCH or the semi-static PDSCH scheduling in a slot n + k, where the value of k may be indicated by a "PDSCH-to-HARQ-timing-indicator" field in the DCI.

Since the k values indicated by different DCIs may be different, the terminal may be instructed to feed back the feedback information of the PDSCH received at different times on the same HARQ feedback resource. Exemplarily, the k value indicated by DCI1 on slot 1 is 3, that is, the terminal is instructed to perform HARQ feedback on slot 4 for the PDSCH received on slot 1; the k value indicated by the DCI2 on slot2 is 2, that is, the terminal is instructed to perform HARQ feedback on slot 4 for the PDSCH received on slot 2; therefore, the terminal needs to feed back HARQ-ACK information for two PDSCHs on slot 4 (i.e. PDSCH received on slot 1 and PDSCH received on slot 2). It can be seen that the terminal may transmit HARQ-ACK information of the PDSCH received in different slots on the same feedback resource. A set formed by all HARQ-ACK bit information sent by the terminal on the same feedback resource is called a HARQ-ACK codebook (HARQ-ACK codebook), and a PDSCH or DCI signaling corresponding to the HARQ-ACK bit information may be from the same activated cell or from different activated cells as long as the activated cells belong to the same HARQ feedback cell group (PUCCH group).

In the current New Radio (NR), the subcarrier bandwidth supported in the frequency spectrum range (FR) 1 includes 15kHz, 30kHz, and 60kHz, and the subcarrier bandwidth supported in the FR2 frequency band includes 120kHz, 480kHz, and 960kHz. Since an Orthogonal Frequency Division Multiplexing (OFDM) symbol length is inversely proportional to a subcarrier bandwidth, the larger the subcarrier bandwidth is, the shorter the corresponding OFDM symbol length is, and the shorter the slot length is. In order to save DCI signaling overhead, in a scenario where a subcarrier bandwidth is large, one DCI may schedule multiple PDSCHs. However, the current method for determining the feedback codebook by the terminal is only suitable for the situation that one DCI only schedules one PDSCH, and cannot be continuously suitable for the scenario that one DCI schedules a plurality of PDSCHs.

Disclosure of Invention

The embodiment of the application provides a method and a communication device for determining a feedback codebook, which are used for solving the problem of how to determine the feedback codebook by a terminal device or a network device when one DCI schedules a plurality of downlink channels.

In a first aspect, an embodiment of the present application provides a method for determining a feedback codebook, including: the method comprises the steps that first equipment receives first Downlink Control Information (DCI) sent by second equipment, wherein the first DCI is used for scheduling one or more first channels, the first DCI comprises first indication information, and the first indication information is used for indicating the number of binding units which correspond to the same feedback resource and are scheduled for the first equipment from a first cell to a cell where the first DCI is located after all activated cells belonging to the same PUCCH group are arranged according to a preset sequence until the first DCI detection opportunity arrives; and the first device sends feedback information to the second device, wherein the feedback information is used for indicating whether the first device successfully receives all the first channels corresponding to each binding unit, and a feedback codebook of the feedback information is determined according to the first indication information.

In the conventional HARQ feedback process, the situation that time-domain bundled feedback is supported when one DCI schedules multiple first channels does not exist, that is, only individual feedback for each first channel is supported, and therefore, the number of bits occupied by feedback information is large, which is not beneficial to saving codebook load and feedback resource overhead. In the embodiment of the present application, the DCI signaling sent by the second device includes the first indication information to indicate the number of the binding units scheduled by the current cell at the current time, so that the first device can determine the size and the mapping relationship of the feedback codebook in the binding mode according to the first indication information, and avoid that the correct size of the feedback codebook cannot be determined because the first device does not successfully receive part of the DCI due to various interference factors.

In a possible implementation manner, the first DCI further includes second indication information, where the second indication information is used to indicate, by the first DCI detection opportunity, the number of the bundling units corresponding to the same feedback resource scheduled for the first device in all activated cells belonging to the same PUCCH group; the feedback codebook is determined according to the first indication information and the second indication information.

In a possible implementation manner, the size of the feedback codebook is determined according to the second indication information, and the mapping relationship of the feedback codebook is determined according to the first indication information and/or the second indication information.

In a possible implementation manner, the bundling unit is all first channels scheduled by one DCI; or the binding unit is obtained by binding the first channels according to the binding granularity, wherein the binding granularity is K first channels.

In a possible implementation manner, when the bonding granularity is K first channels, the number of bonding units corresponding to each DCI is

Wherein N represents the number of first channels scheduled by the DCI; the first indication information is specifically used to indicate the sum of the number of bundling units corresponding to each DCI corresponding to the same feedback resource scheduled for the first device in all activated cells belonging to the same PUCCH group by the first DCI detection opportunity.

In a possible implementation manner, the first DCI further includes downlink assignment index DAI indication information, where the DAI information includes counter-type downlink assignment index C-DAI indication information and/or total-number-type downlink assignment index T-DAI indication information.

In a possible implementation manner, the first channel is a physical downlink shared channel PDSCH.

In a second aspect, an embodiment of the present application provides a method for determining a feedback codebook, including: the first DCI is used for scheduling one or more first channels, and the first DCI comprises first indication information which is used for indicating the number of binding units which correspond to the same feedback resource and are scheduled for the first equipment from a first cell to the cell where the first DCI is located after all activated cells belonging to the same PUCCH group are arranged according to a preset sequence after the first DCI detection opportunity is reached; and the second device receives feedback information sent by the first device, wherein the feedback information is used for indicating whether the first device successfully receives all the first channels corresponding to each binding unit, and a feedback codebook of the feedback information is determined according to the first indication information.

In a possible implementation manner, the first DCI further includes second indication information, where the second indication information is used to indicate, by the first DCI detection opportunity, the number of the bundling units corresponding to the same feedback resource, which are scheduled for the first device in all activated cells belonging to the same PUCCH group; the feedback codebook is determined according to the first indication information and the second indication information.

In one possible implementation, when the bonding granularity is K first channelsThe number of the binding units corresponding to each DCI is

In a third aspect, an embodiment of the present application provides a communication apparatus, including: a processor, and a memory and a communication interface respectively coupled to the processor; the communication interface is used for communicating with other equipment; the processor is configured to execute the instructions or the program in the memory, and perform the method for determining a feedback codebook according to the first aspect and any one of the possible implementations of the first aspect through the communication interface.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, including: a processor, and a memory and a communication interface each coupled to the processor; the communication interface is used for communicating with other equipment; the processor is configured to execute instructions or programs in the memory, and perform the method for determining a feedback codebook according to the second aspect and any one of the possible implementations of the second aspect through the communication interface.

In a fifth aspect, embodiments of the present application provide a computer-readable storage medium having stored therein computer-readable instructions, which, when executed on a computer, cause the method according to the first aspect, the second aspect and any one of the possible implementations to be performed.

In a sixth aspect, embodiments of the present application provide a computer program product containing instructions that, when executed on a computer, cause the method according to the first aspect, the second aspect, and any possible implementation manner to be performed.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application;

fig. 2 is a flowchart illustrating a method for determining a feedback codebook according to an embodiment of the present disclosure;

fig. 3 is one of schematic diagrams of first indication information and second indication information provided in an embodiment of the present application;

fig. 4 is a second schematic diagram of the first indication information and the second indication information provided in the embodiment of the present application;

fig. 5 is a third schematic diagram of the first indication information and the second indication information provided in the embodiment of the present application;

fig. 6 is a fourth schematic diagram of the first indication information and the second indication information provided in the embodiment of the present application;

fig. 7 is a flowchart illustrating another method for determining a feedback codebook according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

In NR R15, two HARQ-ACK codebook types are supported, namely a semi-static HARQ-ACK codebook (semi-static HARQ-ACK codebook) and a dynamic HARQ-ACK codebook (dynamic HARQ-ACK codebook). The dynamic HARQ-ACK codebook refers to that the size and mapping relationship of the HARQ-ACK codebook are determined according to actual scheduling of the network device, that is, the terminal device feeds back HARQ information according to the number of PDSCHs (or other channels, such as DCI of PDSCHs releasing SPS) actually scheduled by the network device, which is helpful for reducing redundancy of feedback information and saving resources compared with a semi-static HARQ-ACK codebook.

The embodiment of the application provides a method for determining a feedback codebook, which can be used in a process of determining a dynamic HARQ-ACK codebook by a terminal device or a network device, and solves a problem of how to determine the feedback codebook by the terminal device or the network device when one DCI schedules a plurality of channels.

The method may be applied in a communication system architecture as shown in fig. 1, which includes a network device and a terminal device as shown in fig. 1.

The network device is a Radio Access Network (RAN) device, which may also be referred to as an access network device or a base station, and is configured to access the terminal device to a radio network. The radio access network may be a base station (base station), an evolved NodeB (eNodeB) in an LTE system or an evolved LTE system (LTE-Advanced, LTE-a), a next generation base station (next generation NodeB, gNB) in a 5G communication system, a Transmission Reception Point (TRP), a Base Band Unit (BBU), a WiFi Access Point (AP), a base station in a future mobile communication system or an access node in a WiFi system, and the like. The radio access network device may also be a module or unit that performs part of the functions of the base station, and may be, for example, a Centralized Unit (CU) or a Distributed Unit (DU). The CU here completes the functions of a radio resource control protocol and a packet data convergence layer protocol (PDCP) of the base station, and may also complete the functions of a Service Data Adaptation Protocol (SDAP); the DU performs functions of a radio link control (rlc) layer and a Medium Access Control (MAC) layer of the base station, and may also perform functions of a part of or all of a physical layer, and for detailed descriptions of the above protocol layers, reference may be made to related technical specifications of the third generation partnership project (3 rd generation partnership project,3 gpp). The radio access network device may be a macro base station, a micro base station or an indoor station, a relay node or a donor node, and the like. The embodiments of the present application do not limit the specific technologies and the specific device forms adopted by the radio access network device.

A terminal device may also be referred to as a terminal, a User Equipment (UE), a mobile station, a mobile terminal, or the like. The terminal device can be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-equipment (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wearing, smart transportation, smart city, and the like. The terminal equipment can be a mobile phone, a tablet personal computer, a computer with a wireless transceiving function, wearable equipment, a vehicle, an unmanned aerial vehicle, a helicopter, an airplane, a steamship, a robot, a mechanical arm, intelligent household equipment and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

It should be understood that fig. 1 is only one example of a scenario that can be applied to the method for determining a feedback codebook provided in the embodiment of the present application, and the method for determining a feedback codebook provided in the embodiment of the present application may also be applied to other scenarios that require feedback codebook determination.

Referring to fig. 2, a flow chart of a feedback codebook determination method provided in an embodiment of the present application is schematically illustrated, and as shown in the drawing, the method may include the following steps:

step 201, the first device receives a first DCI for scheduling one or more first channels, where the first DCI is sent by the second device and includes first indication information.

Optionally, the first device may be a terminal device, and the second device may be a network device.

The first indication information indicates the number of the binding units corresponding to the same feedback resource, which are sent to the first device by the current serving cell until the first DCI detection opportunity. The binding unit may be understood as a first channel unit obtained by binding the first channel according to a preset binding granularity. Terminating to the current serving cell means that all cells belonging to the same Physical Uplink Control Channel (PUCCH) group activated by the terminal are arranged according to a preset order (for example, in a descending order) according to the cell index, and then all cells from the first cell to the cell where the first DCI is located are reached. Taking the example that the bundling granularity is 2 first channels, in the specific embodiment shown in fig. 3, the second device sends DCI1 to the first device in cell 1 at time T0, DCI1 schedules 4 first channels, and when T0 expires, DCI1 arrives at the current serving cell, 4 first channels are scheduled, which correspond to 2 bundling units, so that the first indication information (i.e., a-T-DAI shown in the figure) in DCI1 is 2. The second device sends DCI2 to the first device in the cell 2 at the time t0, the DCI2 schedules 2 first channels, and by the time t0, 6 first channels are scheduled to the current serving cell, corresponding to 3 binding units, so that the first indication information in the DCI2 is 3. The second device sends DCI3 to the first device in the cell 2 at the time t1, the DCI3 schedules 2 first channels till the time t0, and schedules 8 first channels corresponding to 4 binding units till the current serving cell, so that the first indication information in the DCI3 is 4.

Step 202, the first device sends feedback information to the second device, where the feedback information is used to indicate whether the first device successfully receives all the first channels corresponding to each binding unit, and a feedback codebook used by the feedback information is determined according to the first indication information.

And when the first equipment sends the feedback information to the second equipment, the first equipment utilizes the feedback codebook to feed back. The size of the feedback codebook represents the length of the feedback information, the mapping relation of the feedback codebook represents the content of the feedback information fed back in sequence, and the first device can determine the size and the mapping relation of the feedback codebook according to the first indication information. Each bit in the feedback information may indicate whether all the first channels in one corresponding binding unit are successfully received, and the mapping relationship of the feedback codebook indicates the binding unit corresponding to each bit.

Still taking fig. 3 as an example, the indication feedback resource received by the first device is located in all DCIs of feedback resource 1, and the size of the feedback codebook is determined according to the maximum value of the first indication information, that is, the size of the feedback codebook is determined to be 4 bits according to a-T-DAI =4 in DCI 3. And sequencing the DCIs from small to large according to the A-T-DAI, wherein the sequencing result is DCI1, DCI2 and DCI3, so that the feedback information of 2 binding units in the DCI1 is located at the first 2 bits of a feedback codebook, the feedback information of 1 binding unit in the DCI2 is located at the 3rd bit of the feedback codebook, and the feedback information of 1 binding unit in the DCI3 is located at the 4 th bit of the feedback codebook.

If the first device does not receive DCI2 in cell 2 at time T0 due to interference, it cannot receive 3 first channels scheduled by DCI2, but DCI1 and DCI3 are successfully received, the first device may also determine that 1 binding unit is not received according to a-T-DAI =2 in DCI1, a-T-DAI =4 in DCI3, and 1 binding unit is scheduled by DCI3, and the first device may still determine the size of the feedback codebook according to a-T-DAI =4 in DCI3, assuming that the maximum codeword of the first channel is 1, the size of the feedback codebook is 4 bits, and since the first device does not receive DCI with an a-T-DAI of 3, NACK information is transmitted on the 3rd bit of the feedback information, and it is ensured that the size of the feedback codebook does not change due to missed DCI detection.

In the conventional HARQ feedback process, there is no situation that one DCI supports multiple first channels when scheduling multiple first channels, that is, separate feedback needs to be performed for each first channel, and therefore, the number of bits occupied by feedback information is large, which is not beneficial to saving signaling and resources. In the above embodiment of the present application, the first device may perform bonding feedback on multiple first channels, thereby saving the bit number of the feedback information. Further, the DCI signaling sent by the second device may further include first indication information to indicate the total number of the binding units scheduled by the current DCI detection opportunity, so that the first device may determine the size of the feedback codebook according to the first indication information, and determine the size of the feedback codebook erroneously when the first device does not successfully receive the DCI due to various interference factors is avoided.

Optionally, the first channel may be a PDSCH, a Physical Downlink Control Channel (PDCCH) for releasing semi-persistent scheduling (SPS), or other channels, that is, the method may also be applied to a dynamic HARQ-ACK codebook determination process of other channels that need to be fed back.

In a possible implementation manner, the first DCI may further include second indication information to improve the above scheme, so that the feedback codebooks determined by the first device and the second device are consistent as much as possible. Specifically, the second indication information is used to indicate the number of the bundling units corresponding to the same feedback resource scheduled for the first device in all activated cells belonging to the same PUCCH group by the first DCI detection opportunity. When the first DCI includes the second indication information, the first device may determine the size and the mapping relationship of the feedback codebook according to the first indication information and/or the second indication information.

Taking the example that the bundling granularity is 2 first channels, in the specific embodiment shown in fig. 3, for DCI1, by time T0, the second device schedules 6 first channels in cell 1 and cell 2, which correspond to 3 bundling units, so that the second indication information (i.e., B-T-DAI shown in the figure) in DCI1 is 3. For DCI2, by time t0, the second device schedules 6 first channels in cell 1 and cell 2, which correspond to 3 bonding units, so that the second indication information in DCI2 is 3. For DCI3, by time t1, the second device schedules 8 first channels in cell 1 and cell 2, which correspond to 4 bonding units, so that the second indication information in DCI3 is 4. The first device may determine that the size of the feedback codebook is 4 bits according to the second indication information in the DCI 3.

Taking the example that the bundling granularity is 2 first channels, in the specific embodiment shown in fig. 4, the second device sends DCI to the first device on 3 cells at the same time. For DCI1 transmitted on

cell

1, 2 binding units are scheduled until the time and cell 1, so that the first indication information (i.e., a-T-DAI shown in the figure) in DCI1 is 2; by the detection time of DCI1, the second device schedules 8 first channels in cell 1, cell 2, and cell 3, which correspond to 4 bonding units, so that the second indication information (i.e., B-T-DAI shown in the figure) in DCI1 is 4. For DCI2 sent on

cell

2, 3 binding units are scheduled until the time and cell 2, so that the first indication information in DCI2 is 3; by the detection time of the DCI2, the second device schedules 8 first channels in the cell 1, the cell 2, and the cell 3, which correspond to 4 bonding units, so that the second indication information in the DCI1 is 4. For DCI3 sent on a

cell

3, 4 binding units are scheduled until the time and until the cell 3, so that the first indication information in the DCI3 is 4; by the detection time of DCI3, the second device schedules 8 first channels in cell 1, cell 2, and cell 3, which correspond to 4 bonding units, so that the second indication information in DCI3 is 4.

In the above scenario, even if the first device does not receive DCI3, it may still be determined that the size of the feedback codebook is 4 bits according to the second indication information in DCI1 or DCI2, and is consistent with the size of the feedback codebook determined by the second device.

In the foregoing embodiment, the binding granularity is 2 first channels as an example, but in different scenarios, different binding granularities may also be set according to requirements. For example, the binding granularity may be set to K first channels, and a value of K may be preconfigured or indicated by a higher layer signaling (e.g., RRC signaling); alternatively, the bundling granularity may be all of the first channels scheduled for one DCI.

When the bundling granularity is all the first channels scheduled by one DCI, the first indication information and the second indication information are explained with reference to the specific embodiment shown in fig. 5.

The second device sends DCI1 to the first device in cell 1 at time t 0; DCI2 is transmitted to the first device in cell 2 at time t 0; DCI3 is transmitted to the first device in cell 2 at time t 1.

For DCI1 transmitted by

cell

1, 1 total DCI is transmitted by time T0 and by cell 1, so that the first indication information (i.e., a-T-DAI shown in the figure) in DCI1 is 1; since 2 total DCIs are transmitted in all cells up to time T0, the second indication information (i.e., B-T-DAI shown in the figure) in DCI1 is 2. For the DCI2 transmitted by the

cell

2, 2 pieces of DCI are transmitted by the time t0 and by the cell 2, so that the first indication information in the DCI2 is 2; since 2 DCI items are transmitted in all cells up to time t0, the second indication information in DCI2 is 2. For the DCI3 transmitted at the time t1 in the

cell

2, 3 pieces of DCI are transmitted until the time t1 and until the cell 2, so that the first indication information in the DCI3 is 3; since 3 total DCI are transmitted in all cells up to time t1, the second indication information in DCI1 is 3.

When the binding granularity is K first channels, the number N of the first channels scheduled by each DCI may be flexibly configured, so that there is a possibility that the number N of the first channels scheduled by the DCI and the value K are not in an integer multiple relationship. At this time, the number of the bonding units obtained after the N first channels scheduled by each DCI are bonded by the K first channels may be

. Correspondingly, the first indication information is used to indicate the sum of the number of the binding units corresponding to each DCI corresponding to the same feedback resource scheduled to the first device by the first DCI detection opportunity and the current serving cell.

The first indication information and the second indication information are explained below with reference to the specific embodiment shown in fig. 6. The bundling granularity is 2 first channels, that is, the first device performs bundling feedback for every 2 first channels scheduled by one DCI. The second device sends DCI1 to the first device in a cell 1 at a time t0, the DCI1 schedules 5 first channels, and the number of corresponding binding units is

(ii) a DCI2 is sent to the first equipment in the cell 2 at the time t0, and the DCI2 schedules 3 first channels, wherein the number of the corresponding binding units is

(ii) a DCI3 is sent to the first equipment in the cell 2 at the time t1, and the DCI3 schedules 3 first channels, and the number of the corresponding binding units is

。

For DCI1 sent by

cell

1, 3 binding units are scheduled until T0 and cell 1, so that the first indication information (a-T-DAI shown in the figure) in DCI1 is 3; by time T0, 3+2=5 binding units are scheduled in all cells, so the second indication information (B-T-DAI shown in the figure) in DCI1 is 5.

For DCI2 sent by

cell

2, 3+2=5 binding units are scheduled by the time t0 and by the time cell 2, so that the first indication information in the DCI2 is 5; by the time t0, 3+2=5 binding units are scheduled in all cells, so that the second indication information in the DCI2 is 5.

For DCI3 sent by

cell

3, 3+2= 7 binding units are scheduled by time t1 and cell 2, so that the first indication information in DCI3 is 7; by time t0, 3+2+2=7 binding units are scheduled in all cells, so the second indication information in the DCI3 is 7.

And when the time t2 of the sending time of the feedback resource 1 is up, the first device does not receive the DCI indicating the same HARQ feedback resource any more, and the first device determines that the size of the feedback codebook is 7 bits according to the first indication information or the second indication information in the DCI3 received last. According to the first indication information, determining that a first bit in a feedback codebook is used for performing binding feedback on the first 2 first channels scheduled in the DCI1, determining that a second bit in the feedback codebook is used for performing binding feedback on the 3rd and 4 th first channels scheduled in the DCI1, and determining that a third bit in the feedback codebook is used for performing binding feedback on the 5 th first channel scheduled in the DCI 1; determining a fourth bit in the feedback codebook for performing binding feedback on the first 2 first channels scheduled in the DCI2, and determining a fifth bit in the feedback codebook for performing binding feedback on the 3rd first channel scheduled in the DCI 2; and determining a sixth bit in the feedback codebook for performing binding feedback on the first 2 first channels scheduled in the DCI3, and determining a seventh bit in the feedback codebook for performing binding feedback on the 3rd first channel scheduled in the DCI 3.

In some embodiments, a Downlink Assignment Index (DAI) may be further included in the first DCI, and the DAI indication information includes a counter DAI (C-DAI) and/or a total DAI (T-DAI). Specifically, the C-DAI may indicate the number of first channels corresponding to the same feedback resource, which are sent to the first device by the second device until the detection opportunity of the first DCI and the current serving cell are reached. The T-DAI may indicate the number of first channels corresponding to the same feedback resource that the second device transmits to the first device by indicating the detection opportunity of the first DCI. For example, in the embodiment shown in fig. 3, 4 first channels are scheduled until time t0 and until cell 1 for DCI1 transmitted by cell 1, so that C-DAI in DCI1 is 4; by time T0, a total of 6 first channels are scheduled on all cells, so the T-DAI in DCI1 is 6. 6 first channels are scheduled until the time t0 and the cell 2 of DCI2 sent by the cell 2, so that the C-DAI in the DCI2 is 6; by time T0, a total of 6 first channels are scheduled on all cells, so the T-DAI in DCI1 is 6. For DCI3 sent by the

cell

2, 8 first channels are scheduled by the time t1 and the cell 2, so that the C-DAI in the DCI3 is 8; by time T1, a total of 8 first channels are scheduled on all cells, so the T-DAI in DCI1 is 8.

It should be understood that although each DCI is labeled with C-DAI, T-DAI, first indication information (a-T-DAI) and second indication information (B-T-DAI) in fig. 3 to fig. 6, the indication information is only used to indicate a numerical value indicated by the information if the information is included, but does not indicate that each DCI needs to include the above 4 pieces of indication information, and the required indication information may be carried in the DCI according to actual needs.

In one possible design, the second device may flexibly configure whether to perform binding feedback for the first device. When the second device configures the non-binding feedback for the first device, the DCI sent by the second device may only include the DAI indication information, that is, the occupied bit size of the domain where the first indication information is located is 0. When the second device configures the binding feedback for the first device, the DCI sent by the second device may include the first indication information, or the first indication information and the second indication information. When the second device configures the binding feedback for the first device, and the binding granularity is a first channel scheduled by the primary DCI, the first indication information and the second indication information may multiplex the same fields in the DCI with the C-DAI and the T-DAI under the non-binding feedback.

The embodiment of the present application further provides a method for determining a feedback codebook, which is used to solve the problem how to determine the feedback codebook because different types of DCI have different tolerances on DCI missing detection when the sizes of bits occupied by DAI indication information fields in different types of DCI in a plurality of cells activated by a first device are different. Due to the limited bit size occupied by the DAI indication information field, the number of scheduled PDSCHs that can be indicated is limited, for example, if the indication information size of C-DAI/T-DAI is 2 bits, the maximum number of PDSCHs that can be indicated is 3, and if the number of PDSCHs corresponding to the same feedback resource exceeds 4, a modulo operation is required, such as modulo 4. The bit size occupied by the DAI indication information field determines the tolerance to DCI missed detection. To support scheduling of multiple PDSCHs for one DCI, the bit size occupied by the DAI indication information field needs to be increased.

Two types of DCI are supported in NR, the fallback DCI and the none-fallback DCI. The fallback DCI is used for DCI when the terminal initially accesses, the non-fallback DCI is used for DCI after RRC connection, and the format content and the size of the DCI can be configured by network equipment. While the format content and size of the fallback DCI are fixed and not modifiable due to its use for initial access. So as to support scheduling of multiple PDSCHs by one DCI, the bit size occupied by the DAI indication information field may be dynamically configured by the network device, and the characteristic of scheduling of multiple PDSCHs by one DCI is supported only by the non-full back DCI. Therefore, for different types of DCI, the DCI missing detection tolerance is different, and a new codebook needs to be designed to support different DCI missing detection capabilities in one codebook.

As shown in fig. 7, the method may include the steps of:

step 701, the first device receives a first type of DCI, where the first type of DCI is a first format, and the DCI in the first format can schedule one or more first channels.

For example, the format of DCI1 received by the first device in activated cell 1 is DCI1_1, which may schedule one or more PDSCHs.

Step 702, the first device receives a second type of DCI, where the second type of DCI is a second format, and the DCI in the second format can only schedule one first channel.

For example, the format of DCI2 received by the first device in the activated cell 2 is DCI1_0, also referred to as fall-back DCI. The size of each domain in the DCI of this format is fixed, and cannot be configured flexibly, and the DCI of this format may be applied to a terminal device in an initial access process, and only 1 PDSCH may be scheduled.

Step 703, the first device determines a first feedback sub-codebook according to the first type of DCI, and determines a second feedback sub-codebook according to the second type of DCI.

Because the first type of DCI and the second type of DCI have different formats and the number of first channels that can be scheduled is different, corresponding feedback sub-codebooks may be determined for the first channels scheduled by the different types of DCI, respectively.

The method for determining the feedback codebook according to the first type of DCI may refer to any one of the methods for determining the feedback codebook described in the foregoing implementation manners, and details are not repeated here.

The conventional feedback codebook determining method may be referred to in the manner of determining the second feedback sub-codebook according to the second type of DCI, for example, the size and the mapping relationship of the second feedback sub-codebook may be determined according to the DAI indication information in the second type of DCI.

Step 704, the first device sends feedback information to the second device, and a feedback codebook of the feedback information is determined according to the first feedback sub-codebook and the second feedback sub-codebook.

When the first device sends the feedback information, the determined first feedback sub-codebook and the determined second feedback sub-codebook may be spliced to obtain a feedback codebook, and then the feedback information is generated according to the feedback codebook and sent to the second device.

In a possible implementation manner, the DCI in the second format may be further divided into a first channel supporting Code Block Group (CBG) scheduling transmission and a first channel not supporting CBG scheduling transmission. In this case, the sub-codebooks may be respectively fed back for DCI supporting CBG transmission and DCI not supporting CBG transmission in the second format. For example, assuming that the second type of DCI is the second format and does not support CBG transmission, the terminal device further receives a third type of DCI, which is the second format and supports CBG transmission. At this time, a first feedback sub-codebook may be determined according to the first type of DCI, a second feedback sub-codebook may be determined according to the second type of DCI, a third feedback sub-codebook may be determined according to the third type of DCI, and a final feedback codebook may be determined according to the first feedback sub-codebook, the second feedback sub-codebook, and the third feedback sub-codebook; or when the first device does not receive the first type of DCI, the first device may also determine the second feedback sub-codebook according to the second type of DCI, and determine the third feedback sub-codebook according to the third type of DCI, so as to determine the final feedback codebook according to the second feedback sub-codebook and the third feedback sub-codebook.

Optionally, the first channel may be a PDSCH, that is, the method may be applied to a dynamic HARQ-ACK codebook determination process of the PDSCH; alternatively, the first channel may also be a PDCCH for releasing SPS, that is, the method may be applied to a dynamic HARQ-ACK codebook determination process of the PDCCH for releasing SPS; alternatively, the first channel may also be another channel, that is, the method may also be applied to the determination process of the dynamic HARQ-ACK codebook for other channels that need to be fed back.

In the conventional HARQ feedback process, there is no case where one DCI schedules a plurality of first channels, and even if there are DCIs of different formats, a feedback codebook may be determined together according to the respective DCIs. The embodiments of the present application may be applied to a situation where one DCI schedules multiple first channels, and respectively determine corresponding feedback sub-codebooks according to DCIs of different formats, and then determine a feedback codebook corresponding to final feedback information according to the determined feedback sub-codebooks.

Based on the same technical concept, the embodiment of the present application further provides a method for determining a feedback codebook, which is used for solving the problem that the second device determines the feedback codebook. Specifically, in the method, the second device sends, to the first device, a first DCI for scheduling one or more first channels, where the first DCI includes first indication information, and the first indication information is used to indicate the number of binding units corresponding to the same feedback resource, scheduled for the first device, until a first DCI detection opportunity expires and a current serving cell is reached. And the second equipment receives the feedback information sent by the first equipment, and the size and the mapping relation of a feedback codebook of the feedback information are determined according to the first indication information.

Further, the first DCI may further include second indication information and/or DAI indication information. The meanings of the second indication information and the DAI indication information are the same as those in the previous embodiment, and are not described herein again.

The way of determining the size and the mapping relationship of the feedback codebook by the second device is the same as the way of determining the size and the mapping relationship of the feedback codebook by the first device in the foregoing embodiment, which can be referred to as any implementation way of determining the size and the mapping relationship of the feedback codebook in the foregoing embodiment.

Based on the same technical concept, embodiments of the present application further provide a method for determining a feedback codebook, which is used to solve the problem that if a feedback codebook is determined when DCI formats in multiple cells activated by a first device are different. In the method, a second device sends first-class DCI to a first device, wherein the first-class DCI is in a first format, and the first-format DCI can schedule one or more first channels. The second device also sends a second type of DCI to the first device, wherein the second type of DCI is a second format, and the DCI in the second format can schedule only one first channel. And the second equipment determines a first feedback sub-codebook according to the first type of DCI and determines a second feedback sub-codebook according to the second type of DCI. And the second equipment receives the feedback information sent by the first equipment, and the feedback codebook of the feedback information is determined according to the first feedback sub-codebook and the second feedback sub-codebook.

The method for determining the first feedback sub-codebook and the second feedback sub-codebook by the second device is consistent with the method for determining the first feedback sub-codebook and the second feedback sub-codebook by the first device in the foregoing embodiment, which can be referred to any implementation manner of determining the feedback sub-codebook in the foregoing embodiment.

Based on the same technical concept, the embodiment of the present application further provides a communication apparatus, where the communication apparatus is configured to implement the steps performed by the first device in the foregoing method embodiments.

In a possible design, the communication apparatus may include a module corresponding to one to perform the method/operation/step/action performed by the first device in the foregoing method embodiment, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit.

Illustratively, the communication apparatus may be as shown in fig. 8, and includes a receiving module 801 and a transmitting module 802. Specifically, the receiving module 801 is configured to receive a first DCI sent by a second device; a sending module 802, configured to send the feedback information to the second device.

In addition, the above modules may also be used in other processes executed by the first device in any of the foregoing embodiments. The beneficial effects can be obtained by referring to the foregoing description, and are not described in detail herein.

Based on the same technical concept, the embodiment of the present application further provides a communication apparatus, where the communication apparatus is configured to implement the steps performed by the second device in the foregoing method embodiments.

In a possible design, the communication apparatus may include a module corresponding to one to perform the method/operation/step/action performed by the second device in the above method embodiment, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit.

Illustratively, the communication apparatus may include a sending module 901 and a receiving module 902, as shown in fig. 9. Specifically, the sending module 901 is configured to send a first DCI to a first device; a receiving module 902, configured to receive feedback information sent by the first device.

In addition, the above modules may also be used in other processes executed by the second device in any of the foregoing embodiments. The beneficial effects can be obtained by referring to the foregoing description, and are not described in detail herein.

Based on the same technical concept, the embodiment of the application also provides a communication device. The communication device includes a processor 1001 as shown in fig. 10, and a communication interface 1002 connected to the processor 1001.

The processor 1001 may be a general purpose processor, a microprocessor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, or one or more integrated circuits for controlling the execution of programs in accordance with the teachings of the present application, or the like. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

Communication interface 1002 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc.

In the embodiment of the present application, the processor 1001 is configured to call the communication interface 1002 to perform the receiving and/or sending functions and execute the method according to any one of the foregoing possible implementation manners.

Further, the communication apparatus may further include a memory 1003 and a communication bus 1004.

The memory 1003 is used for storing program instructions and/or data, so that the processor 1001 can call the instructions and/or data stored in the memory 1003 to implement the above functions of the processor 1001. The memory 1003 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM) or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 1003 may be a stand-alone memory, such as an off-chip memory, coupled to the processor 1001 via a communication bus 1004. The memory 1003 may also be integrated with the processor 1001.

The communication bus 1004 may include a path that conveys information between the aforementioned components.

For example, the communication device may be a first device in the foregoing method embodiment, or may be a second device in the foregoing method embodiment.

The processor 1001 is used for implementing data processing operations of the communication apparatus, and the communication interface 2002 is used for implementing receiving operations and transmitting operations of the communication apparatus.

When the communication apparatus is a first device, the processor 1001 is configured to receive, through the communication interface 1002, first DCI transmitted by a second device; a sending module 802, configured to send the feedback information to the second device.

Furthermore, the above components may also be used to support other processes performed by the first device in the above method embodiments.

The beneficial effects can be obtained by referring to the foregoing description, and are not described in detail herein.

When the communication apparatus is a second device, the processor 1001 is configured to send the first DCI to the first device through the communication interface 1002, and receive feedback information sent by the first device.

Furthermore, the above components may also be used to support other processes performed by the second device in the above method embodiments.

The beneficial effects can be referred to the previous description, and are not described in detail herein.

Based on the same technical concept, embodiments of the present application further provide a computer-readable storage medium, where computer-readable instructions are stored, and when the computer-readable instructions are executed on a computer, the scrambling method according to any one of the foregoing possible implementations is executed.

Embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the above-described method embodiments to be performed.

In the description of the embodiment of the present application, "and/or" describes an association relationship of associated objects, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. The plural in the present application means two or more.

In addition, it is to be understood that the terms first, second, third and the like in the description of the present application are used for distinguishing between the descriptions and are not to be construed as indicating or implying relative importance or order. Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather mean "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

The embodiment of the application provides a computer-readable storage medium, which stores a computer program, wherein the computer program comprises instructions for executing the method embodiment.

Embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the above-described method embodiments.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A method for determining a feedback codebook, the method comprising:

the method comprises the steps that first equipment receives first Downlink Control Information (DCI) sent by second equipment, wherein the first DCI is used for scheduling one or more first channels, the first DCI comprises first indication information, and the first indication information is used for indicating the number of binding units which correspond to the same feedback resource and are scheduled for the first equipment from a first cell to a cell where the first DCI is located after all activated cells belonging to the same PUCCH group are arranged according to a preset sequence until the first DCI detection opportunity arrives;

and the first device sends feedback information to the second device, wherein the feedback information is used for indicating whether the first device successfully receives all the first channels corresponding to each binding unit, and a feedback codebook of the feedback information is determined according to the first indication information.

2. The method of claim 1, wherein the first DCI further comprises second indication information, and wherein the second indication information is used to indicate the number of bundling units corresponding to the same feedback resource scheduled for the first device in all activated cells belonging to the same PUCCH group by the first DCI detection opportunity;

the feedback codebook is determined according to the first indication information and the second indication information.

3. The method according to claim 2, wherein the size of the feedback codebook is determined according to the second indication information, and the mapping relation of the feedback codebook is determined according to the first indication information and/or the second indication information.

4. The method according to any of claims 1-3, wherein the bundling unit is all first channels scheduled by one DCI; or, the binding unit is obtained by binding the first channels according to the binding granularity, where the binding granularity is K first channels.

5. The method of claim 4, wherein when the bundling granularity is K first channels, the number of the bundling units corresponding to each DCI is K

Wherein N represents the number of first channels scheduled by the DCI;

the first indication information is specifically used to indicate the sum of the number of bundling units corresponding to each DCI corresponding to the same feedback resource scheduled for the first device in all activated cells belonging to the same PUCCH group by the first DCI detection opportunity.

6. The method according to claim 1, wherein the first DCI further comprises Downlink Assignment Index (DAI) indication information, and wherein the DAI information comprises counter type downlink assignment index (C-DAI) indication information and/or total number type downlink assignment index (T-DAI) indication information.

7. The method according to any of claims 1-5, characterized in that the first channel is a physical downlink shared channel, PDSCH.

8. A method for determining a feedback codebook, the method comprising:

the first DCI is used for scheduling one or more first channels, and comprises first indication information which is used for indicating the number of binding units which correspond to the same feedback resource and are scheduled for the first equipment from a first cell to the cell where the first DCI is located after all activated cells belonging to the same PUCCH group are arranged according to a preset sequence by the first DCI detection opportunity;

and the second device receives feedback information sent by the first device, wherein the feedback information is used for indicating whether the first device successfully receives all the first channels corresponding to each binding unit, and a feedback codebook of the feedback information is determined according to the first indication information.

9. The method of claim 8, wherein the first DCI further comprises second indication information, and wherein the second indication information is used to indicate the number of bundling units corresponding to the same feedback resource scheduled for the first device in all activated cells belonging to the same PUCCH group by the first DCI detection opportunity;

10. The method according to claim 9, wherein the size of the feedback codebook is determined according to the second indication information, and the mapping relationship of the feedback codebook is determined according to the first indication information and/or the second indication information.

11. The method according to any of claims 8-10, wherein the bundling unit is all first channels scheduled by one DCI; or the binding unit is obtained by binding the first channels according to the binding granularity, wherein the binding granularity is K first channels.

12. The method of claim 11, wherein when the bundling granularity is K first channels, the number of bundling units corresponding to each DCI is equal to K

Wherein N represents the number of first channels scheduled by the DCI;

13. The method according to claim 1, wherein the first DCI further comprises Downlink Assignment Index (DAI) indication information, and wherein the DAI information comprises counter type downlink assignment index (C-DAI) indication information and/or total number type downlink assignment index (T-DAI) indication information.

14. The method according to any of claims 8-13, wherein the first channel is a physical downlink shared channel, PDSCH.

15. A communications apparatus, comprising: a processor, and a memory and a communication interface each coupled to the processor; the communication interface is used for communicating with other equipment; the processor, for executing instructions or programs in the memory, to perform the method of any of claims 1-7 through the communication interface.

16. A communications apparatus, comprising: a processor, and a memory and a communication interface respectively coupled to the processor; the communication interface is used for communicating with other equipment; the processor, for executing instructions or programs in the memory, to perform the method of any of claims 8-14 via the communication interface.

17. A computer-readable storage medium having stored therein instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-14.