CN117675147A

CN117675147A - HARQ-ACK codebook feedback method and communication device

Info

Publication number: CN117675147A
Application number: CN202211213951.8A
Authority: CN
Inventors: 黄秀璇; 李新县; 丁梦颖; 彭金磷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-08-11
Filing date: 2022-09-30
Publication date: 2024-03-08

Abstract

The application provides a HARQ-ACK codebook feedback method and a communication device, wherein the method comprises the following steps: the network device sends a DCI to the terminal, the DCI schedules N1 data channels on a plurality of cells, and the DCI includes an accumulated downlink allocation index C-DAI. And the terminal determines the arrangement sequence of the HARQ feedback information of the N1 data channels in the HARQ-ACK codebook according to the C-DAI, and feeds back the HARQ-ACK codebook to the network equipment. The scheme can enable the terminal and the network equipment to understand the HARQ-ACK codebook consistently, thereby improving the transmission reliability of the HARQ-ACK codebook.

Description

HARQ-ACK codebook feedback method and communication device

The present application claims priority from chinese patent office, application number 202210963819.2, application name "HARQ-ACK codebook feedback method and communication device", filed on 11/08/2022, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of wireless communication, and more particularly, to a HARQ-ACK codebook feedback method and a communication apparatus.

Background

In the fifth generation (5 ^th In a generation,5G mobile communication system, in order to reduce control signaling overhead and improve scheduling efficiency, it is proposed that in a carrier aggregation (carrier aggregation, CA) communication scheme, data channels on a plurality of cells may be scheduled by one downlink control information (downlink control information, DCI), and the data channels may be a physical downlink shared channel (physical downlink shared channel, PDSCH) or a physical uplink shared channel (physical uplink shared channel, PUSCH).

The hybrid automatic repeat request (hybrid automatic repeat request, HARQ) mechanism is an acknowledgement mechanism combining forward error correction (forward error correction, FEC) techniques with automatic repeat request (automatic repeat request, ARQ) techniques. The data receiving end can inform the data sending end whether the data is successfully received or not by sending feedback information. However, the current HARQ scheme is designed for one DCI to schedule data channels of one cell, and when one DCI can schedule data channels of a plurality of cells, the HARQ scheme needs to be adaptively improved so that a receiving end and a transmitting end of data agree on whether the data is correctly received.

Disclosure of Invention

The embodiment of the application provides a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook feedback method and a communication device, which can improve HARQ-ACK codebook feedback and further improve the efficiency and reliability of data transmission.

In a first aspect, a HARQ-ACK codebook feedback method is provided, which may be performed by a terminal or a module (e.g., a chip) configured (or for) the terminal. The following will describe an example of the terminal executing the method.

The method comprises the following steps: the terminal receives first downlink control information (downlink control information, DCI) from the network device, the first DCI including scheduling information of N1 data channels on W cells and a first cumulative downlink allocation index (counter-downlink assignment index, C-DAI), wherein W, N1 is an integer greater than 1 and W is less than or equal to N1. The terminal sends feedback information comprising a first HARQ-ACK codebook to the network device, wherein the first HARQ-ACK codebook comprises HARQ feedback information of N2 data channels, N2 is an integer greater than 1, the N2 data channels comprise N1 data channels scheduled by the first DCI, and the arrangement sequence of the HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook is determined by the terminal according to the first C-DAI.

According to the scheme, the multi-cell scheduling DCI (i.e. DCI for scheduling a plurality of data channels on a plurality of cells) sent by the network equipment to the terminal comprises the C-DAI, and the terminal and the network equipment determine the ordering of the HARQ feedback information of the data channels in the HARQ-ACK codebook based on the C-DAI, so that the terminal and the network equipment can make the HARQ-ACK codebook understanding of the HARQ feedback information of a plurality of data channels comprising one DCI schedule consistent. Even if the terminal fails to detect DCI, the terminal can determine the correct sequence of each data channel in the HARQ-ACK codebook according to the C-DAI, so that the transmission reliability of the HARQ-ACK codebook is improved consistent with the understanding of the network equipment on the HARQ-ACk codebook, and the network equipment can retransmit the data block in time when the terminal does not successfully receive the data block through the feedback of the reliable HARQ-ACK codebook, thereby improving the transmission efficiency and the reliability of the data block.

In a second aspect, a HARQ-ACK codebook feedback method is provided, which may be performed by a network device or a module (e.g., a chip) configured (or for) the network device. The method is described below by taking a network device as an example.

The method comprises the following steps: the network device transmits a first DCI to the terminal, the first DCI including scheduling information of N1 data channels on W cells and a first C-DAI, wherein W, N1 is an integer greater than 1, and W is less than or equal to N1. The network device receives feedback information from the terminal, wherein the feedback information comprises a first HARQ-ACK code book, the first HARQ-ACK code book comprises HARQ feedback information of N2 data channels, N2 is an integer greater than 1, and the N2 data channels comprise N1 data channels scheduled by the first DCI. The arrangement order of the HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook is determined by the network device according to the first C-DAI.

In certain implementations of the first aspect or the second aspect, the first C-DAI indicates an accumulated count value of the first DCI in DCI for scheduling the N2 data channels, where DCI for scheduling the N2 data channels is sequentially accumulated and counted in a sequence from small to large in a serving cell index of a cell where the DCI is located in the same listening occasion, and then sequentially accumulated and counted in a time sequence of the listening occasion to which the DCI belongs.

Or, the first C-DAI indicates an accumulated count value obtained by counting (serving cell, PDCCH listening opportunity) -pairs according to the sequence of the serving cell indexes from small to large and the time sequence of the listening opportunities, before the first C-DAI indicates the current serving cell (i.e. the serving cell where the first DCI is located) and the current listening opportunity (i.e. the first listening opportunity where the first DCI is located).

According to the scheme, the C-DAI specifically indicates the accumulated count value of the first DCI which is cut off to the current monitoring time, so that the terminal can determine the sequence of the HARQ feedback information of the data channel scheduled by the first DCI in the HARQ-ACK codebook based on the accumulated count value of the first DCI, and the HARQ-ACK codebook is obtained. Accordingly, the network device determines the HARQ feedback information of the data channel scheduled by the first DCI in the HARQ-ACK codebook according to the accumulated count value of the first DCI, so that the terminal and the network device can understand the HARQ-ACK codebook consistently, and the reliability of the HARQ-ACK codebook is improved.

In certain implementations of the first or second aspect, if multiple DCIs in the same listening occasion and on the same cell in the DCIs scheduling N2 data channels, the multiple DCIs are counted up sequentially in order of small to large or in order of large to small serving cell index of the cell in which the reference data channel scheduled by each DCI is located.

In one example, the reference data channel for DCI scheduling is a data channel with the smallest serving cell index of the cell in which the data channel for DCI scheduling is located.

In another example, the reference data channel of the DCI schedule is a data channel for determining a time unit for transmitting HARQ feedback information among the data channels of the DCI schedule.

According to the scheme, if the multiple multi-cell scheduling DCIs are on the same monitoring time and the same cell, the DCIs can be ordered according to the service cell index of the cell where the reference data channel is located, so that the situation that ordering understanding is inconsistent between the terminal and the network equipment is reduced.

In certain implementations of the first or second aspect, the first C-DAI in the first DCI indicates an accumulated count value of scheduled ones of the N2 data channels that is blocked to the first DCI. The N2 data channels are firstly accumulated and counted for the data channels scheduled by the DCI according to the sequence from small to large of the serving cell index of the cell where the DCI scheduling the data channels is located in the same listening opportunity, and then the data channels are sequentially accumulated and counted according to the time sequence of the listening opportunity where the DCI is scheduled.

Or, the first C-DAI indicates an accumulated count value obtained by counting (PDCCH monitoring opportunity, data channel) -pairs according to the time sequence of the monitoring opportunity and the index of the serving cell where the DCI is located from small to large, before the carrier where the current monitoring opportunity (i.e. the first monitoring opportunity where the first DCI is located) and the current DCI (i.e. the first DCI) are located.

According to the scheme, the C-DAI specifically indicates the maximum accumulated count value of the data channel which is scheduled by the current DCI up to the current monitoring time, so that the terminal can sort the HARQ feedback information of the data channel based on the accumulated count value of the data channel, and the HARQ-ACK codebook is obtained. Accordingly, the network equipment determines the HARQ feedback information of each data channel in the HARQ-ACK codebook according to the accumulated count value of the data channels, so that the terminal and the network equipment can understand the HARQ-ACK codebook consistently, and the reliability of the HARQ-ACK codebook is improved.

In certain implementations of the first or second aspect, the first C-DAI indicates an accumulated count value of a data channel of the N2 data channels for which a serving cell index of a cell of the N1 data channels is smallest. The N2 data channels are sequentially accumulated and counted according to the sequence from small to large of the serving cell index of the cell where the data channels in the same monitoring time are located, and then sequentially accumulated and counted according to the time sequence of the monitoring time to which the DCI of the scheduled data channel belongs.

According to the scheme, the C-DAI indicates the accumulated count value of the data channel with the smallest index of the serving cell in the data channel scheduled by the DCI, and the terminal can determine the accumulated count value of each scheduled data channel according to the number of the data channels scheduled by the DCI and the accumulated count value indicated by the C-DAI, so that the ordering of each data channel in the HARQ-ACK codebook is determined, and the understanding of the HARQ-ACK codebook is consistent with that of the network equipment.

In certain implementations of the first or second aspect, the first DCI further includes a total downlink allocation index (total-downlink assignment index, T-DAI).

In one example, the T-DAI indicates a total count of scheduled ones of the N2 data channels up to the first listening occasion. The first listening occasion is a listening occasion where the first DCI is located.

In another example, the T-DAI indicates that the total count value of DCI for N2 data channels is scheduled until the first listening occasion.

According to the scheme, the T-DAI is included in the multi-cell scheduling DCI, and the total number of DCIs or data channels actually transmitted by the network equipment can be determined under the condition that the terminal does not detect the last DCI before feeding back the HARQ-ACK codebook, so that the size of the correct HARQ-ACK codebook is determined, and the understanding of the network equipment on the HARQ-ACK codebook is consistent.

In certain implementations of the first or second aspect, the DCI scheduling N2 data channels each schedules a plurality of data channels on a plurality of cells.

According to the scheme, the HARQ feedback information of the data channel scheduled by the DCI adopting the multi-cell scheduling mode is borne in one HARQ-ACK codebook, namely, the C-DAI in the multi-cell scheduling DCI carries out accumulated counting on the data channel scheduled by the multi-cell scheduling DCI or the multi-cell scheduling DCI, so that the problems that the accumulated counting is carried out by mixing a plurality of scheduling modes and the HARQ feedback has mutual influence to improve the error probability of the HARQ feedback can be reduced.

In certain implementations of the first aspect or the second aspect, the feedback information sent by the terminal further includes a second HARQ-ACK codebook, where the second HARQ-ACK codebook includes HARQ feedback information for N3 data channels, and DCI for scheduling each of the N3 data channels schedules only one data channel.

In certain implementations of the first aspect or the second aspect, the feedback information sent by the terminal further includes a third HARQ-ACK codebook, where the third HARQ-ACK codebook includes HARQ feedback information for N4 data channels, and DCI for scheduling each of the N4 data channels schedules a plurality of data channels located in a plurality of time units.

According to the scheme, the accumulated counts are respectively carried out aiming at different scheduling modes, so that the problem that the accumulated understanding errors of the terminal to one scheduling mode cause inconsistent understanding of the whole HARQ-ACK codebook and network equipment can be reduced.

In certain implementations of the first aspect or the second aspect, the first HARQ-ACK codebook includes K HARQ feedback information groups, K is a number of DCIs scheduling N2 data channels, one HARQ feedback information group includes L1 HARQ feedback information, and one HARQ feedback information of the L1 HARQ feedback information includes HARQ feedback information of the data channel scheduled by the DCI, where L1 is a maximum number of data blocks scheduled by the one DCI, and L1 is greater than or equal to N1, and the data channel is used to carry at least one data block.

According to the scheme, the number of the HARQ feedback information corresponding to each DCI in the first HARQ-ACK codebook is determined according to the maximum number of the data blocks which can be scheduled by each DCI, so that the size of the HARQ-ACK codebook can be understood to be consistent by the terminal and the network equipment. The terminal can determine the quantity of the HARQ feedback information corresponding to the DCI in the HARQ-ACK codebook even if the terminal detects one or more DCIs, and the problem that the terminal and the network equipment are inconsistent in understanding the HARQ-ACK codebook due to the fact that the terminal detects the DCI.

In certain implementations of the first aspect or the second aspect, the first HARQ-ACK codebook includes K feedback information groups, one of the HARQ feedback information groups includes L2 HARQ feedback information, and the L2 HARQ feedback information includes HARQ feedback information of a data channel group to which a DCI scheduled data channel belongs, where L2 is less than or equal to N1, and L2 is a maximum number of data channel groups scheduled by one DCI.

According to the scheme, the terminal groups a plurality of data channels scheduled by the multi-cell scheduling DCI, and each data channel group feeds back one HARQ feedback information, so that the feedback overhead of the HARQ feedback information can be reduced, and the resource utilization rate can be improved.

In a third aspect, a communications apparatus is provided, where the apparatus can include modules, either hardware circuitry or software, or a combination of hardware circuitry and software implementation, that perform the methods/operations/steps/actions described in the first aspect. In one design, the apparatus includes: and a transceiver unit, configured to receive a first DCI from a network device, where the first DCI includes scheduling information of N1 data channels on W cells and a first cumulative downlink allocation index C-DAI, where W, N1 is an integer greater than 1, and W is less than or equal to N1. And a processing unit, configured to determine feedback information including a first HARQ-ACK codebook, where the first HARQ-ACK codebook includes HARQ feedback information for N2 data channels, N2 is an integer greater than 1, N2 data channels include N1 data channels, and an arrangement order of the HARQ feedback information for the N1 data channels in the first HARQ-ACK codebook is determined according to the first C-DAI. The transceiver unit is further configured to send the feedback information to the network device.

In a fourth aspect, a communications apparatus is provided, where the apparatus can include means for performing the method/operation/step/action described in the second aspect, where the means can be implemented in hardware circuitry, software, or a combination of hardware circuitry and software. In one design, the apparatus includes: and a transceiver unit, configured to send first DCI to the terminal, where the first DCI includes scheduling information of N1 data channels on W cells and a first cumulative downlink allocation index C-DAI, where W, N1 is an integer greater than 1, and W is less than or equal to N1. The transceiver unit is further configured to receive feedback information from the terminal, where the feedback information includes a first HARQ-ACK codebook, the first HARQ-ACK codebook includes HARQ feedback information for N2 data channels, N2 is an integer greater than 1, and the N2 data channels include N1 data channels. And the processing unit is used for determining the arrangement sequence of the HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook according to the first C-DAI.

In a fifth aspect, a communication device is provided that includes a processor. The processor may implement the method of the first aspect and any one of the possible implementations of the first aspect. Optionally, the communications apparatus further comprises a memory, the processor coupled to the memory and operable to execute instructions in the memory to implement the method of the first aspect and any possible implementation of the first aspect. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface. In the embodiments of the present application, the communication interface may be a transceiver, a pin, a circuit, a bus, a module, or other types of communication interfaces, without limitation.

In one implementation, the communication device is a terminal. When the communication device is a terminal, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the terminal. When the communication device is a chip configured in a terminal, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a sixth aspect, a communication device is provided that includes a processor. The processor may implement the method of the second aspect described above and any one of the possible implementations of the second aspect. Optionally, the communications apparatus further comprises a memory, the processor being coupled to the memory and operable to execute instructions in the memory to implement the method of the second aspect and any one of the possible implementations of the second aspect. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication apparatus is a network device. When the communication apparatus is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in a network device. When the communication device is a chip configured in the first network apparatus, the communication interface may be an input/output interface.

In a seventh aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the first or second aspect and the method in any one of the possible implementations of the first or second aspect.

In a specific implementation process, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiments of the present application do not limit the specific implementation manner of the processor and the various circuits.

In an eighth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when executed, causes a computer to perform the method of the first or second aspect and any one of the possible implementations of the first or second aspect.

In a ninth aspect, there is provided a computer readable storage medium storing a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the computer to perform the method of the first or second aspect and any one of the possible implementations of the first or second aspect.

In a tenth aspect, a communication system is provided comprising at least one terminal and at least one network device as described above.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system 1000 to which embodiments of the present application apply;

fig. 2 is a schematic diagram of a PDCCH listening occasion provided in an embodiment of the present application;

fig. 3 is a schematic diagram of a HARQ feedback timing relationship provided in an embodiment of the present application;

fig. 4 is a schematic flowchart of a feedback method of a HARQ-ACK codebook provided in an embodiment of the present application;

Fig. 5 to 8 are schematic diagrams of a feedback method of a HARQ-ACK codebook according to an embodiment of the present application;

fig. 8A is a schematic diagram of a feedback method of a HARQ-ACK codebook based on a carrier set according to an embodiment of the present application;

fig. 9 to 13 are schematic diagrams of a feedback method of a HARQ-ACK codebook according to an embodiment of the present application;

fig. 14 is a schematic diagram of an HARQ-ACK codebook provided in an embodiment of the present application;

fig. 15 is another schematic diagram of a feedback method of HARQ-ACK codebook provided in the embodiment of the present application;

fig. 15A is a schematic diagram of a HARQ-ACK codebook feedback method based on a joint accumulated count manner according to an embodiment of the present application;

FIG. 16 is a schematic block diagram of a communication device provided in an embodiment of the present application;

fig. 17 is another schematic structural diagram of a communication device provided in an embodiment of the present application.

Detailed Description

In the embodiment of the present application, "/" may indicate that the associated object is an "or" relationship, for example, a/B may indicate a or B; "and/or" may be used to describe that there are three relationships associated with an object, e.g., a and/or B, which may represent: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In order to facilitate description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. may be used to distinguish between technical features that are the same or similar in function. The terms "first," "second," and the like do not necessarily denote any order of quantity or order of execution, nor do the terms "first," "second," and the like.

The technical solution of the embodiment of the application can be applied to various mobile communication systems, for example: the long term evolution (long term evolution, LTE) system, the 5G mobile communication system, and future mobile communication systems (such as the sixth generation (6th generation,6G) communication system), or a system in which multiple communication systems are integrated, etc., embodiments of the present application are not limited.

Fig. 1 is a schematic architecture diagram of a communication system 1000 to which embodiments of the present application apply. As shown in fig. 1, the communication system comprises a radio access network 100 and a core network 200, and optionally the communication system 1000 may further comprise the internet 300. The radio access network 100 may include at least one radio access network device (e.g., 110a and 110b in fig. 1) and may also include at least one terminal (e.g., 120a-120j in fig. 1). The terminal is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminals and the radio access network device may be connected to each other by wired or wireless means. Fig. 1 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 1.

The radio access network device is an access device to which the terminal accesses the communication system by wireless. The radio access network device may be a base station (base station), an evolved NodeB (eNodeB), a transmission and reception point (transmission reception point, TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; the present invention may also be a module or unit that performs a function of a base station part, for example, a Central Unit (CU) or a Distributed Unit (DU). The CU can complete the functions of a radio resource control protocol and a packet data convergence layer protocol (packet data convergence protocol, PDCP) of the base station and can also complete the functions of a service data adaptation protocol (service data adaptation protocol, SDAP); the DU performs the functions of the radio link control layer and the medium access control (medium access control, MAC) layer of the base station, and may also perform the functions of a part of the physical layer or the entire physical layer, and for a detailed description of the above protocol layers, reference may be made to the relevant technical specifications of the third generation partnership project (3rd generation partnership project,3GPP). The radio access network device may be a macro base station (e.g. 110a in fig. 1), a micro base station or an indoor station (e.g. 110b in fig. 1), a relay node or a donor node, etc. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the wireless access network equipment. For convenience of description, a base station will be described below as an example of a radio access network device.

A terminal is a device having a wireless transceiving function, and can transmit a signal to a base station or receive a signal from a base station. A terminal may also be referred to as a terminal device, user Equipment (UE), mobile station, mobile terminal, etc. The terminal may be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-device (vehicle to everything, V2X) communication, machine-type communication (MTC), internet of things (internet of things, IOT), virtual reality, augmented reality, industrial control, autopilot, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, and the like. The terminal can be a mobile phone, a tablet personal computer, a computer with a wireless receiving and transmitting function, a wearable device, a vehicle, an airplane, a ship, a robot, a mechanical arm, intelligent household equipment and the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal.

The base station and the terminal may be fixed in position or movable. Base stations and terminals may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aircraft, balloons and satellites. The application scenes of the base station and the terminal are not limited in the embodiment of the application.

The roles of base station and terminal may be relative, e.g., helicopter or drone 120i in fig. 1 may be configured as a mobile base station, terminal 120i being the base station for those terminals 120j that access radio access network 100 through 120 i; but for base station 110a 120i is a terminal, i.e., communication between 110a and 120i is via a wireless air interface protocol. Of course, communication between 110a and 120i may be performed via an interface protocol between base stations, and in this case, 120i is also a base station with respect to 110 a. Thus, both the base station and the terminal may be collectively referred to as a communication device, 110a and 110b in fig. 1 may be referred to as a communication device having base station functionality, and 120a-120j in fig. 1 may be referred to as a communication device having terminal functionality.

Communication can be carried out between the base station and the terminal, between the base station and between the terminal and the terminal through the authorized spectrum, communication can be carried out through the unlicensed spectrum, and communication can also be carried out through the authorized spectrum and the unlicensed spectrum at the same time; communication can be performed through a frequency spectrum of 6 gigahertz (GHz) or less, communication can be performed through a frequency spectrum of 6GHz or more, and communication can be performed using a frequency spectrum of 6GHz or less and a frequency spectrum of 6GHz or more simultaneously. The embodiments of the present application do not limit the spectrum resources used for wireless communications.

In the embodiments of the present application, the functions of the base station may be performed by a module (such as a chip) in the base station, or may be performed by a control subsystem including the functions of the base station. The control subsystem comprising the base station function can be a control center in the application scenarios of smart power grids, industrial control, intelligent transportation, smart cities and the like. The functions of the terminal may be performed by a module (e.g., a chip or a modem) in the terminal, or by a device including the functions of the terminal.

In the application, a base station sends a downlink signal or downlink information to a terminal, and the downlink information is borne on a downlink channel; the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on an uplink channel. In order for a terminal to communicate with a base station, it is necessary to establish a radio connection with a cell controlled by the base station. The cell with which the terminal has established a radio connection is called the serving cell of the terminal. The terminal may also be interfered by signals from neighboring cells when communicating with the serving cell.

In the embodiments of the present application, the time domain symbols may be orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols or discrete fourier transform spread OFDM (Discrete Fourier Transform-spread-OFDM, DFT-s-OFDM) symbols. Symbols in embodiments of the present application all refer to time domain symbols, unless otherwise specified.

It should be understood that in the embodiments of the present application, the physical downlink shared channel (physical downlink shared channel, PDSCH), the physical downlink control channel (physical downlink control channel, PDCCH), and the physical uplink shared channel (physical uplink shared channel, PUSCH) are merely examples of downlink data channels, downlink control channels, and uplink data channels, respectively, and that in different systems and different scenarios, the data channels and the control channels may have different names, and the embodiments of the present application are not limited thereto.

For a better understanding of the embodiments of the present application, the techniques and terms referred to herein are briefly described below.

1. Cell and carrier

A cell may be understood as a coverage area of a wireless signal identified by a network device identity or a global cell identity. A cell is a unit for managing radio communication resources, and the frequency domain resources of the cell include at least one carrier, which is a continuous block of frequency domain resources used to carry information. The information in the present application may include one or more of control information, traffic data, and reference signals. The carrier is characterized by a carrier frequency point and a carrier bandwidth. At least one carrier included in a cell includes a downlink carrier and one or more uplink carriers. The downlink carrier is used to carry wireless signals sent by the network device to the terminal. The uplink carrier is used for bearing wireless signals sent by the terminal to the network. Depending on the duplex mode, for example, when the cell adopts frequency division duplex (frequency division duplex, FDD) mode, the downlink carrier and the uplink carrier of one cell may be different. When the cells adopt a time division duplex (time division duplex, TDD) mode, the downlink carrier and the uplink carrier of one cell may be the same.

The carrier of a cell constitutes the time-frequency resource of the cell as a frequency domain resource and a time resource, or it may be understood that the carrier forms the time-frequency resource over time. The information transmitted by the network equipment and the terminal in the cell is carried on the time-frequency resource of the cell. Specifically, the downlink carrier and the time resource form the downlink time-frequency resource of the cell, and the uplink carrier and the time resource form the uplink time-frequency resource of the cell.

2. Carrier aggregation (carrier aggregation, CA)

In a non-carrier aggregation scenario, a terminal may establish a communication connection with a cell that provides network services for the terminal.

In the carrier aggregation scene, the terminal can establish communication connection with a plurality of cells, the cells serve as service cells of the terminal to provide communication services for the terminal, carrier frequencies of the cells are different, frequency domain resources of carriers are not overlapped, communication bandwidth of network equipment and the terminal can be increased, and data transmission rate can be improved.

3. PDCCH monitoring opportunity (monitoring occasion)

The PDCCH is used to carry DCI, and the PDCCH listening occasion is a time unit for listening to the PDCCH. The network device may configure a PDCCH listening occasion for the terminal, and the network device may send DCI to the terminal on a PDCCH within one PDCCH listening occasion. The terminal detects the PDCCH in the PDCCH listening occasion to acquire DCI.

The network device may configure the PDCCH listening period, the PDCCH listening offset, and the PDCCH listening mode for the terminal so that the terminal may determine the location of the PDCCH listening occasion. If the PDCCH listening period is 2 slots and the listening offset is 1, it may be determined that the listening occasion is located in the second slot of the 2 slots within each PDCCH period. As shown in fig. 2, the terminal may determine that slots 1, 3, 5, 7 and slot 9 include PDCCH listening occasions. The PDCCH monitoring mode is to configure a starting symbol of a PDCCH search space in a time slot to be monitored through a bitmap (bitmap) with 14 bits, wherein the 14 bits are in one-to-one correspondence with 14 symbols of one time slot, the most significant bit (leftmost bit) corresponds to a first symbol of one time slot, and the least significant bit (rightmost bit) corresponds to a last symbol of the time slot. One bit of the 14 bits is used to indicate whether the corresponding symbol is a start symbol of a search space of the PDCCH, for example, the 14 bits is "1000000000000", which indicates that a first symbol in one slot where the PDCCH needs to be monitored is a first symbol of the PDCCH search space, and the terminal may search for the PDCCH in the search space starting from the first symbol in each slot where the PDCCH needs to be monitored. As another example, the 14 bits are "0100000000000", which indicates that the terminal can search for the PDCCH in a search space starting from the second symbol in each slot where the PDCCH needs to be monitored. The number of duration symbols of the search space is configured in the CORESET time domain length configuration by a duration (duration) field, e.g., the field may indicate 2, which indicates that the search space lasts 2 OFDM symbols.

4. Hybrid automatic repeat request (hybrid automatic repeat request, HARQ) -Acknowledgement (ACK) codebook

In a mobile communication system, a network device transmits DCI for scheduling a PDSCH to a terminal, and the terminal receives data on the PDSCH according to the DCI from the network device. The DCI includes a PDSCH-to-HARQ feedback timing indication (PDSCH-to-harq_ feedback timing indicator) for indicating a time interval K1 between a time unit for a terminal to transmit HARQ feedback information and a PDSCH scheduled by the DCI. So that the terminal can determine the time unit for transmitting the HARQ feedback information of the PDSCH according to the time unit where the PDSCH is located and the time interval K1. The HARQ feedback information belongs to one of the uplink control information (uplink control information, UCI) and is typically transmitted by the terminal on the physical uplink control channel (physical uplink control channel, PUCCH) of the time unit. The terminal may also send the HARQ feedback information to the network device on a physical uplink shared channel (physical uplink shared channel, PUSCH) for the time unit when a certain condition is met.

K1 indicated by different DCI may be different, so that HARQ feedback information of PDSCH received by the terminal in different time units may be transmitted in the same time unit. HARQ feedback information of different PDSCH transmitted in the same time unit constitutes one HARQ-ACK codebook. As shown in fig. 3, taking an example that a time unit is a time slot, the network device indicates that K1 is 8 time slots in DCI for scheduling PDSCH 1 in downlink time slot n, and the terminal may determine, according to time slot n where PDSCH 1 is located and k1=8, to send HARQ feedback information of PDSCH 1 in uplink time slot n+8. The network device indicates that K1 is 6 slots in DCI scheduling PDSCH 2 in downlink slot n+2, indicates that K1 is 3 slots in DCI scheduling PDSCH3 in downlink slot n+5, and the terminal may determine that HARQ feedback information of PDSCH 2 and PDSCH3 is also transmitted in uplink slot n+8. The HARQ-ACK codebook transmitted by the terminal in the uplink slot n+8 includes HARQ feedback information of PDSCH 1, PDSCH 2 and PDSCH 3. In the embodiment of the present application, the time unit is described as a time slot, but the present application is not limited thereto, and in a specific implementation, the time unit may be other time units such as a frame, a subframe, a mini-slot (mini-slot), a sub-slot (sub-slot), and the like.

The current HARQ mechanism is designed for one DCI to schedule data channels of one cell, and when one DCI can schedule data channels of a plurality of cells, the HARQ mechanism needs to be adaptively improved so that the receiving end and the transmitting end of data understand whether the data is correctly received or not. In embodiments of the present application, a cell and a carrier may be used interchangeably without logical contradiction, e.g., a data channel of a cell and a data channel on a carrier may be used interchangeably, and a cell index and carrier identification may be used interchangeably.

The embodiment of the application provides a feedback method of an HARQ-ACK codebook, wherein DCI which is sent to a terminal by network equipment and is used for scheduling a plurality of data channels on a plurality of carriers comprises C-DAI. And the terminal determines the arrangement sequence of the HARQ feedback information of the data channels scheduled by the DCI in the HARQ-ACK codebook according to the C-DAI, and feeds back the obtained HARQ-ACK codebook to the network equipment. The terminal feeds back the HARQ-ACK codebook to the network equipment according to the C-DAI indicated by the network equipment, so that the terminal and the network equipment can understand and agree with the HARQ-ACK codebook of the HARQ feedback information of a plurality of data channels comprising one DCI schedule. The reliability of HARQ-ACK codebook feedback is improved.

Fig. 4 is a schematic flowchart of a HARQ-ACK codebook feedback method 400 provided in an embodiment of the present application. In this method 400, a network device and a terminal are taken as an example, where the steps performed by the network device in the method 400 may be performed by the network device or a module applied to the network device to implement the corresponding functions, and the steps performed by the terminal in the method 400 may be performed by the terminal or a module applied to the terminal to implement the corresponding functions. The method 400 includes, but is not limited to, the steps of:

s401, the network device sends first DCI to the terminal, where the first DCI includes scheduling information of N1 data channels on W carriers and C-DAI, where W, N1 is an integer greater than 1, and W is less than or equal to N1.

Accordingly, the terminal receives the first DCI from the network device. The listening occasion when the terminal receives the first DCI may be denoted as a first listening occasion. The first DCI includes a first C-DAI, where the first C-DAI is used to determine an arrangement order of HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook sent in S402, and specific reference may be made to the description in S402.

The first DCI schedules N1 data channels on W carriers, the first DCI scheduling at least one data channel on each of the W carriers. For convenience of description, DCI scheduling a plurality of data channels on a plurality of carriers is referred to as multi-carrier scheduling DCI in this application. The terminal receives the N1 data channels on the W carriers according to the first DCI. And the terminal generates HARQ feedback information of the N1 data channels according to whether the N1 data channels are correctly received or not and sends the HARQ feedback information to the network equipment.

S402, the terminal sends feedback information to the network equipment, wherein the feedback information comprises a first HARQ-ACK codebook, the first HARQ-ACK codebook comprises HARQ feedback information of N2 data channels, the N2 data channels comprise N1 data channels, and the arrangement sequence of the HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook is determined according to a first C-DAI. Wherein N2 is an integer greater than or equal to N1.

Wherein, the arrangement order of the HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook is determined according to the first C-DAI, which means that the position of the HARQ feedback information of the N1 data channels as a whole in the first HARQ-ACK codebook is determined according to the first C-DAI. That is, the HARQ feedback information of the N1 data channels as a whole and the HARQ feedback information of other data channels in the first HARQ-ACK codebook are ordered in the first HARQ-ACK codebook according to the first C-DAI.

The first DCI includes the above-mentioned timing indication (hereinafter, simply referred to as "timing indication") of PDSCH-to-HARQ feedback, and the terminal may determine a first slot for transmitting HARQ feedback information of the N1 data channels according to the timing indication, and the terminal transmits a first HARQ-ACK codebook in the first slot, where the first HARQ-ACK codebook includes HARQ feedback information of the N1 data channels. If the terminal determines that feedback information of other data channels needs to be sent in the first time slot according to timing instructions in other DCIs of the received scheduling data channel, that is, N2 is greater than N1, and the feedback information of the N2 data channels needs to be sent in the first time slot. And the terminal determines the arrangement sequence of feedback information of the N2 data channels according to the C-DAI indicated by DCI of the N2 data channels, generates a first HARQ-ACK codebook and sends the first HARQ-ACK codebook in a first time slot.

The manner in which the first C-DAI indicates the cumulative count value may include, but is not limited to, embodiments one through three. These three embodiments are described below, respectively.

In a first embodiment, the first C-DAI indicates an accumulated count value of the first DCI in the DCI for scheduling N2 data channels, where the DCI for scheduling N2 data channels is sequentially accumulated and counted according to a sequence from small to large of indexes of serving cells where the DCI in the same listening opportunity is located, and then sequentially accumulated and counted according to a time sequence of the listening opportunity to which the DCI belongs.

Or, the first C-DAI indicates an accumulated count value obtained by counting (serving cell, PDCCH listening opportunity) -pairs according to the sequence of the serving cell indexes from small to large and the time sequence of the listening opportunities, before the first C-DAI indicates the current serving cell (i.e. the serving cell where the first DCI is located) and the current listening opportunity (i.e. the first listening opportunity where the first DCI is located). As previously mentioned, in this application, cell and carrier may be used interchangeably, and cell index and carrier identification may be used interchangeably. The first C-DAI may also be understood as indicating an accumulated count value obtained by counting (carrier, PDCCH monitoring opportunity) -pairs according to the order of the carrier identifiers from small to large and then according to the chronological order of the monitoring opportunities, until the current carrier (i.e., the carrier where the first DCI is located) and the current monitoring opportunity (i.e., the first monitoring opportunity where the first DCI is located) are cut off. Embodiments of the present application are described below using carriers and carrier identifications as examples.

Since DCI corresponds to PDCCHs carrying DCI one by one, the first C-DAI may also be referred to as an accumulated count value of PDCCHs carrying the first DCI in the PDCCH carrying DCI for scheduling N2 data channels in this embodiment. The following description will take an example of the cumulative count value of the first DCI indicated by the first C-DAI in the DCI scheduling N2 data channels, and the cumulative count value of the first C-DAI indicating the PDCCH may be implemented with reference to the following examples, which are not repeated herein for brevity.

As shown in fig. 5, the network device communicates with the terminal in a carrier aggregation manner, and the network device may schedule PDSCH on multiple carriers through one DCI. As shown in fig. 5, the network device transmits DCI a on carrier 1 and DCI B on carrier 4 in listening occasion n. The DCI a schedules PDSCH 1, PDSCH 2 and PDSCH 3 on carrier 1, carrier 2 and carrier 3, respectively. The DCI B schedules PDSCH 4 and PDSCH 5 on carrier 4 and carrier 5, respectively. The network device may instruct the terminal to transmit HARQ feedback information of 3 PDSCH scheduled by DCI a in the first slot through timing indication in DCI a, and the network device may also instruct to transmit HARQ feedback information of 2 PDSCH scheduled by the network device in the first slot through timing indication in DCI B. Assuming that the DCI in the listening occasion n is the DCI that appears earliest in time and indicates HARQ feedback information of the PDSCH transmitted in the first slot, the carrier identity of the carrier where the DCI a is located is 1 and is smaller than the carrier identity of the carrier where the DCI B is located, so that the C-DAI in the DCI a indicates that the cumulative count value of the DCI is 1 and the C-DAI in the DCI B indicates that the cumulative count value of the DCI is 2. After this listening occasion n, the next DCI sent by the network device indicating HARQ feedback information for PDSCH transmitted in the first slot is DCI C located on carrier 1 in the listening occasion n+k, where k is a positive integer. The DCI C schedules PDSCH 6 and PDSCH 7 on carrier 1 and carrier 3, respectively. The C-DAI in the DCI C indicates that the cumulative count of the DCI is 3.

It should be noted that, in the embodiment shown in fig. 5, the carrier carrying DCI and the carrier carrying PDSCH are exemplarily shown, and the carrier aggregation of the terminal and the network device may include, but is not limited to, carrier 1 to carrier 5 shown in fig. 5, and may also include carriers not shown in fig. 5, such as carrier 0 and/or carrier 6.

If multiple DCIs in the DCIs for scheduling the N2 data channels are on the same monitoring time and the same carrier, the multiple DCIs are sequentially accumulated and counted according to the order from small to large or the order from large to small of carrier identifications of the carriers of the reference data channels scheduled by each DCI in the multiple DCIs.

In one example, the reference data channel of the DCI schedule may be a data channel with the smallest carrier identifier of the carrier in the data channel of the DCI schedule, or may be a data channel with the largest carrier identifier of the carrier in the data channel of the DCI schedule.

Or if multiple DCIs in the DCIs of the N2 data channels are scheduled to be on the same monitoring time and the same carrier, the multiple DCIs are sequentially accumulated and counted according to the order from small to large or the order from large to small of carrier identifications of reference carriers in the carriers of the scheduled data channels. The reference carrier of DCI scheduling may be a data channel with the smallest carrier identifier among the multiple carriers of DCI scheduling, or may be a data channel with the largest carrier identifier among the multiple carriers of DCI scheduling.

As shown in fig. 6, the network device has transmitted DCI a and DCI B on carrier 0 of the same listening occasion, and both the timing indication in DCI a and the timing indication in DCI B indicate HARQ feedback information for transmitting PDSCH in the first slot. Wherein DCI a schedules PDSCH 2 on carrier 1 and PDSCH 3 on carrier 2. DCI B schedules PDSCH 1 on carrier 0 and PDSCH 4 on carrier 3. The network device may determine that the PDSCH with the smallest carrier identifier of the carrier on which the DCI a scheduled data channel is located is the PDSCH 2 on the carrier 1, and the PDSCH 2 is the DCI a scheduled reference data channel. Also, the network device may determine the DCI B scheduled reference data channel as PDSCH 1 on carrier 0. If the carrier identifier 0 of the carrier where the PDSCH 1 is located is smaller than the carrier identifier 1 of the carrier where the PDSCH 2 is located, the DCI B performs cumulative counting before the DCI a, for example, the C-DAI in the DCI B indicates that the cumulative count value of the DCI is y, and the C-DAI in the DCI a indicates that the cumulative count value of the DCI is y+1. The scheme enables the terminal and the network equipment to understand and agree with each other on the accumulated count value of the DCI.

In another example, the reference data channel of the DCI schedule is a data channel used to determine a time unit for transmitting HARQ feedback information among the data channels of the DCI schedule.

For example, the terminal determines the time slot in which the HARQ feedback information of the PDSCH is located according to the time slot in which the PDSCH with the latest end time of DCI scheduling is located and the timing instruction of DCI instruction. As shown in the example of fig. 6, PDSCH 3 of the DCI a schedule is located in slot x, PDSCH 2 is located in slot x+1, and PDSCH 2 is the PDSCH with the latest end time among the PDSCH of the DCI a schedule. And the terminal determines HARQ feedback information of the PDSCH scheduled by the DCI A in the first time slot according to the time slot x in which the PDSCH 2 is positioned and timing indication in the DCI A, and the PDSCH 2 is a reference data channel scheduled by the DCI A. And if the two PDSCH scheduled by the DCI B are in the time slot x, the terminal determines to send the HARQ feedback information of the PDSCH scheduled by the DCI B in the first time slot according to the time slot x and the timing instruction in the DCI B. The network device may determine, according to the carrier identifiers of the carriers in PDSCH 1 and PDSCH 4 in the time slot x scheduled by DCI B, that the scheduled reference data channel in DCI B is PDSCH 1 on carrier 0. After determining the reference data channels scheduled by the DCI A and the DCI B, the network device can perform accumulated counting on the DCI according to the order from small to large of the carrier identifications of the carriers where the reference data channels are located, wherein the carrier identification 0 of the carrier where the PDSCH 1 scheduled by the DCI B is located is smaller than the carrier identification 1 of the carrier where the reference data channel PDSCH 2 of the DCI A is located, the C-DAI in the DCI B indicates that the accumulated count value of the DCI is y, and the C-DAI in the DCI indicates that the accumulated count value of the DCI is y+1. The scheme enables the terminal to be consistent with the understanding of the accumulated count value of the DCI by the network equipment.

And the terminal arranges the HARQ feedback information of the PDSCH sent in the first time slot from small to large according to the accumulated count value indicated by the C-DAI in the DCI so as to obtain a first HARQ-ACK codebook.

In the example shown in fig. 5, if only the 3 DCIs shown in fig. 5 are included to indicate HARQ feedback information of PDSCH transmitted in the first slot, the first HARQ-ACK codebook transmitted by the terminal in the first slot includes HARQ feedback information of 7 PDSCH scheduled by the 3 DCIs, that is, n2=7. The permutation order of the 7 PDSCHs in the first HARQ-ACK codebook is determined according to the C-DAI indicated by the DCI scheduling the PDSCH, in the first HARQ-ACK codebook, the HARQ feedback information of the 3 PDSCHs scheduled by the DCI a precedes the HARQ feedback information of the 2 PDSCHs scheduled by the DCI B, and the HARQ feedback information of the 2 PDSCHs scheduled by the DCI C follows the HARQ feedback information of the 2 PDSCHs scheduled by the DCI B.

Optionally, the arrangement order of HARQ feedback information of multiple PDSCH scheduled by the same DCI in the first HARQ-ACK codebook may be arranged according to the order of the carrier identifiers of the carriers where PDSCH is located from small to large.

In the example shown in fig. 5, the sequence of HARQ feedback information of 3 PDSCHs scheduled by DCI a in the first HARQ-ACK codebook is, in order of the carrier identity of the carrier on which the PDSCH is located from small to large, HARQ feedback information of PDSCH 1 on carrier 1, HARQ feedback information of PDSCH 2 on carrier 2, and HARQ feedback information of PDSCH 3 on carrier 3 in sequence. The sequence of the HARQ feedback information of 2 PDSCH scheduled by DCI B in the first HARQ-ACK codebook is the HARQ feedback information of PDSCH 4 on carrier 4 and the HARQ feedback information of PDSCH 5 on carrier 5 in sequence.

The network device and the terminal understand the arrangement sequence of the HARQ feedback information of the data channels in the first HARQ-ACK codebook in the same manner, so that the network device can determine the position of the HARQ feedback information of the N2 data channels after receiving the first HARQ-ACK codebook, and can determine whether the terminal correctly receives the corresponding data channels based on the HARQ feedback information.

Two specific implementation examples of the first HARQ-ACK codebook provided in the embodiments of the present application are listed below.

In one example, the first HARQ-ACK codebook includes K HARQ feedback information groups, K being the number of DCIs scheduling N2 data channels, one HARQ feedback information group including L1 HARQ feedback information. One HARQ feedback information group includes HARQ feedback information of all data channels scheduled by one DCI, and L1 is greater than or equal to N1, where L1 is a maximum number of data blocks scheduled by one DCI, and the data channels are used to carry at least one data block.

That is, if the timing indication in the K pieces of DCI indicates that the HARQ feedback information of the scheduled data channel is transmitted in the first slot, the terminal includes K HARQ feedback information groups in the first HARQ-ACK codebook transmitted in the first slot, and each HARQ feedback information group includes the maximum L1 pieces of feedback information of the number of data blocks that can be scheduled by one DCI.

Wherein, if the maximum number of PDSCH which can be scheduled by one DCI is N _max And the maximum number of data blocks that one PDSCH can carry is D, then the maximum number of data blocks that one DCI can schedule is N _max ×D。

One DCI may schedule one PDSCH on one carrier only, then one DCI schedules N _max The PDSCHs are respectively positioned at N _max On the carrier. In the embodiment shown in fig. 4, the first DCI schedules N1 data channels on W carriers, in which way w=n1.

As an example and not by way of limitation, the data block may be a Transport Block (TB), a Code Block (CB), or a CB group (CBG).

For example, the data block is TB, and the maximum number N of PDSCH that one DCI can schedule _max 4, and the maximum number of TBs that one PDSCH can carry is 2, the maximum number of TBs that one DCI can schedule L1 is 8. As shown in the example of fig. 5, the first HARQ-ACK codebook includes HARQ feedback information of 7 PDSCH scheduled by 3 DCIs, i.e., k=3, n2=7. The first HARQ-ACK code book comprises 3 HARQ feedback information groups, each HARQ feedback information group comprises 8 HARQ feedback information, 24 HARQ feedback information is included in the first HARQ-ACK code book, the first 8 HARQ feedback information in the first HARQ-ACK code book is feedback information corresponding to DCI A according to the accumulated count value indicated by C-DAI in DCI, DCI A only schedules 3 PDSCH, and the first 6 HARQ feedback information in the 8 HARQ feedback information is 2 HARQ feedback information of PDSCH 1, 2 HARQ feedback information of PDSCH 2 and 2 HARQ feedback information of PDSCH 3 in sequence. Similarly, the middle 8 HARQ feedback information is feedback information corresponding to DCI B, where the first 4 HARQ feedback information is 2 HARQ feedback information of PDSCH 4 and 2 HARQ feedback information of PDSCH 5 in sequence. And the last 8 pieces of HARQ feedback information are the HARQ feedback information corresponding to the DCI C, wherein the first 4 pieces of HARQ feedback information are 2 pieces of HARQ feedback information of the PDSCH 6 and 2 pieces of HARQ feedback information of the PDSCH 7 in sequence.

The 1 HARQ feedback information may be 1 bit, where the 1 bit is used to indicate whether the TB corresponding to the 1 bit is successfully received by the terminal, for example, the 1 bit indicates "1" to indicate that the TB corresponding to the 1 bit is successfully received, and indicates "0" to indicate that the TB corresponding to the 1 bit is not successfully received. In the example of fig. 5, if one DCI does not schedule all 8 TBs, the 8 bits of the HARQ feedback information group corresponding to the DCI include bits not corresponding to the TBs, and the bits not corresponding to the TBs may be set to a preset value, for example, the preset value may be "0".

For example, PDSCH 1 and PDSCH 2 scheduled by DCI a each carry 2 TBs, and PDSCH 3 carries 1 TB, i.e. DCI a schedules 5 TBs altogether, and if the terminal successfully receives the 5 TBs, the first 8 bits in the first HARQ-ACK codebook are "11111000", where the 1 st and 2 nd bits respectively indicate that two TBs of PDSCH 1 are successfully received, and the 3 rd and 4 th bits respectively indicate that two TBs of PDSCH 2 are successfully received. And PDSCH 3 carries 1 TB, the 5 th bit indicates that one TB in PDSCH 3 is successfully received, and the other 3 bits do not correspond to TBs, which indicates a preset value of "0". Accordingly, after the network device receives the first HARQ-ACK codebook, it may determine, according to the 8 bits, that the terminal successfully receives 5 TBs scheduled by DCI a. If the terminal does not successfully receive the second TB of the PDSCH 2, and the bit corresponding to the second TB of the PDSCH 2 indicates "0", the 8 bits are "11101000", and the network device may determine that the terminal does not successfully receive the second TB of the PDSCH 2 in the 5 TBs scheduled by the DCI a according to the 8 bits in the first HARQ-ACK codebook fed back by the terminal, and successfully receive other TBs.

If 2 PDSCHs scheduled by DCI B respectively bear 2 TBs and DCI B schedules 4 TBs in total, the first 4 bits of 8 bits of the HARQ feedback information group corresponding to DCI B sequentially correspond to the 4 TBs, and the remaining 4 bits indicate a preset value of "0".

If PDSCH 6 and PDSCH 7 scheduled by DCI C respectively carry 1 TB, the first bit of 8 bits of the HARQ feedback information group corresponding to DCI C indicates whether 1 TB carried by PDSCH 6 is successfully received by the terminal, and the second bit does not correspond to a TB, indicating "0". The third bit indicates whether 1 TB carried by PDSCH 7 is successfully received by the terminal, and if the terminal successfully receives 2 TBs, the 8 bits are "10100000". If one or two TBs of the 2 TBs are not successfully received by the terminal, the corresponding bit indicates "0". For example, if all the TBs scheduled by the 3 DCIs shown in fig. 5 are successfully received, 24 bits corresponding to the 3 DCIs in the first HARQ-ACK codebook are shown in fig. 7. If there is an unsuccessfully received TB, the corresponding bit indicates "0".

The above description is given taking the example that the data block is a TB as an example, the data block may also be a CB or a CBG, and the specific embodiments may be implemented with reference to the above example of a TB, which is not described herein for brevity.

According to the scheme, the number of feedback information in the HARQ feedback information group corresponding to each DCI contained in the first HARQ-ACK codebook is a fixed value, namely L1, so that the first HARQ-ACK codebook can be obtained according to the C-DAI even if the terminal does not successfully receive one or more DCIs. For example, in the example shown in fig. 5, the terminal successfully receives DCI a and DCI C, but does not receive DCI B, and the terminal may determine that DCI with an accumulated count value of 2 is not received according to C-DAI indication 1 in DCI a and C-DAI indication 3 in DCI C. The 8 bits corresponding to DCI a in the first HARQ-ACK codebook sent by the terminal include 8 bits indicating all "0" corresponding to DCI with an accumulated count value of 2, and then 8 bits corresponding to DCI C. The network device can still determine the HARQ feedback information corresponding to each TB in the first HARQ-ACK codebook according to the C-DAI of 3 DCIs including DCI B. The transmission reliability of the HARQ-ACK codebook is improved, and the network equipment can retransmit the data block in time when the terminal does not successfully receive the data block through the feedback of the reliable HARQ-ACK codebook, so that the transmission efficiency and the reliability of the data block are improved.

In another example, the first HARQ-ACK codebook includes K HARQ feedback information groups, one HARQ feedback information group includes L2 HARQ feedback information, one HARQ feedback information group includes HARQ feedback information of a data channel group to which all data channels of one DCI schedule belong, L2 is less than or equal to N1, and L2 is the maximum number of data channel groups of one DCI schedule.

And the terminal groups the data channels scheduled by one DCI according to the L2, for example, the terminal divides the N1 data channels scheduled by the first DCI into L2 data channel groups, the L2 HARQ feedback information corresponds to the L2 data channel groups one by one, and one HARQ feedback information in the L2 HARQ feedback information indicates that the corresponding data channel group is successfully received or at least one data channel in the corresponding data channel group is not successfully received.

As an example and not by way of limitation, L2 may be signaled by the network device to the terminal or predefined by the protocol. The signaling may be a radio resource control (radio resource control, RRC) message and/or a radio access control (medium access control, MAC) Control Element (CE).

The grouping of the N1 data channels into L2 data channel groups may be determined according to implementation requirements, and in an alternative embodiment, the data channel groups in the L2 data channel groups may include Data channels, the last data channel group comprising +.>A data channel.

For example, the network device may configure L2 to 2 for the terminal through an RRC message. In the example shown in fig. 5, DCI a schedules 3 PDSCH, which is divided into two PDSCH groups, the first one of which includesAnd PDSCH, the second PDSCH group including 2 PDSCH. If the terminal groups according to the order of the carrier identifications of the carriers where the PDSCH is located from small to large, the first PDSCH group includes PDSCH 1, and the second PDSCH group includes PDSCH 2 and PDSCH 3. The 2 PDSCHs scheduled by DCI B and DCI C are each one PDSCH group. The first HARQ-ACK codebook includes 2 bits of HARQ feedback information of 2 PDSCH groups scheduled by each DCI, i.e., the first HARQ-ACK codebook includes 6 bits, from the C-DAI indicated by the DCI, the first 2 bits may be determined as feedback information of 2 PDSCH groups scheduled by DCI a, where the 1 st bit is used to indicate onlyThe 2 nd bit is used to indicate whether the PDSCH group including PDSCH 1 was successfully received by the terminal device, and indicates "0" if at least one PDSCH of PDSCH 2 and PDSCH 3 was not successfully received by the terminal; if both PDSCH 2 and PDSCH 3 are successfully received by the terminal, this bit indicates a "1". The 3 rd and 4 th bits are HARQ feedback information of 2 PDSCHs (i.e., one PDSCH group each) scheduled by DCI B, and the 5 th and 6 th bits are HARQ feedback information of 2 PDSCHs (i.e., one PDSCH group each) scheduled by DCI C. According to the scheme, the PDSCH is grouped, and each group feeds back one HARQ feedback information, so that the bit overhead of the HARQ-ACK codebook can be reduced, and the resource utilization rate is improved.

As further shown in fig. 8, the network device configures L2 to 2 for the terminal through an RRC message. The network device transmits DCI a, which schedules PDSCH 1 to PDSCH 5 as shown in fig. 8 for a total of 5 PDSCH, to the terminal at listening occasion n. The timing indication in the DCI a indicates HARQ feedback information of the PDSCH transmitted in the first slot, and the C-DAI in the DCI a indicates 1. And the network device transmits DCI B, which schedules PDSCH 6 to PDSCH 9 as shown in fig. 8 for a total of 4 PDSCH, at listening occasion n+k. The timing indication in the DCI B also indicates HARQ feedback information of the PDSCH transmitted in the first slot, and the C-DAI in the DCI B indicates 2. The terminal may determine that 5 PDSCH scheduled by DCI a are divided into 3 PDSCH groups, where the first PDSCH group includesThe second PDSCH group includes 3 PDSCH, i.e., PDSCH 1, PDSCH2 is PDSCH group 1, PDSCH 3 through PDSCH 5 are PDSCH group 2. The first 2 bits in the first HARQ-ACK codebook sent by the terminal in the first slot correspond to PDSCH groups 1 and 2 scheduled by DCI a in sequence, respectively, and indicate whether all PDSCH in the corresponding PDSCH group are successfully received. Similarly, the terminal may determine a packet of 4 PDSCH scheduled by DCI B, and the terminal may determine that each group includes 2 PDSCH based on N1 and L2. The 3 rd bit in the first HARQ-ACK codebook indicates whether PDSCH group 3 including PDSCH 6 and PDSCH 7 was received all successfully, and the 4 th bit indicates whether PDSCH group 4 including PDSCH 8 and PDSCH 9 was received all successfully And (5) receiving. The 9 PDSCHs scheduled by DCI A and DCI B only need 4 HARQ feedback bits, so that the feedback overhead of the first HARQ-ACK codebook is reduced, and the resource utilization rate is improved.

In one embodiment, the network device may configure at least one carrier set for the terminal through the first configuration information, where one carrier set includes a plurality of carriers, and one multi-carrier scheduling DCI may schedule a data channel on at least two carriers in one carrier set.

One multi-carrier scheduling DCI transmitted by a network device can only schedule data channels on at least two carriers in one set of carriers. That is, the terminal does not expect one multi-carrier scheduling DCI to schedule a data channel on a carrier in a plurality of carrier sets, i.e. the terminal does not expect one multi-carrier scheduling DCI to schedule a data channel on a carrier in a different carrier set. Wherein the set of carriers may be referred to as a co-scheduled set of carriers. The W carriers where the N1 data channels scheduled by the first DCI are located are carriers in one carrier set.

For example, the network device configures 8 carriers from carrier 0 to carrier 7 for the terminal through the RRC message, and the terminal may use 8 carriers to communicate with the network device in a carrier aggregation communication manner. In addition, the network device configures 2 carrier sets, namely, carrier set 0 and carrier set 1, for the terminal through the first configuration information, wherein the carrier set 0 comprises carriers 0 to 3, and the carrier set 1 comprises carriers 4 to 7. One multi-carrier scheduling DCI transmitted by a network device to a terminal may only schedule multiple carriers within one carrier set.

Illustratively, as shown in fig. 8A, DCI a transmitted by the network device on carrier 1 within listening opportunity n schedules PDSCH on 2 carriers in carrier set 0, i.e., PDSCH 0 on carrier 0 and PDSCH 1 on carrier 1. And the network device also transmits DCI B on carrier 4 within the listening occasion n, which schedules PDSCH on 3 carriers in carrier set 1, namely PDSCH 2 on carrier 4, PDSCH 3 on carrier 5 and PDSCH 4 on carrier 7. The network device transmits DCI C on listening occasion n+k, which schedules PDSCH on 2 carriers in carrier set 1, namely PDSCH 5 on carrier 5 and PDSCH 6 on carrier 6. As this example, one multi-carrier scheduling DCI transmitted by a network device can only schedule PDSCH on multiple carriers in one carrier set.

The network device may further configure, for the terminal, a maximum number of data blocks scheduled by one DCI on one carrier through the second configuration information, where the number of data blocks scheduled by one DCI on one carrier is smaller than or equal to the maximum number of data blocks scheduled by one DCI on the carrier configured by the network device.

The first configuration information and the second configuration information may be carried in an RRC message or other signaling, and the second configuration information may be referred to as, for example, maximum codeword (codeword is another expression of a data block) number configuration information scheduled by DCI, and the second configuration information may be a maxnrofcodewordsschedule bydci cell in the RRC message.

In this embodiment, the first HARQ-ACK codebook includes K HARQ feedback information groups corresponding to K DCIs scheduling N2 data channels, one HARQ feedback information group including L _i HARQ feedback information, the L _i The HARQ feedback information includes feedback information of a DCI scheduled data block corresponding to the HARQ feedback information group. Wherein L is _i Is the sum of the maximum number of data blocks scheduled by one DCI for the carriers in the carrier set i configured by the network device. The carrier set i is a carrier set where a DCI scheduled data channel corresponding to the HARQ feedback information group is located.

For example, the data block is a TB, and as in the example shown in fig. 8A, the network device configures, for the terminal, that the maximum number of data blocks scheduled by one DCI on each of carrier 1, carrier 3, and carrier 7 is 2, and that the maximum number of data blocks scheduled by one DCI on each of the other carriers is 1 through the second configuration information. If only the 3 DCIs shown in fig. 8A are included to indicate HARQ feedback information of PDSCH transmitted in the first slot, the first HARQ-ACK codebook transmitted by the terminal in the first slot includes HARQ feedback information of PDSCH scheduled by the 3 DCIs (i.e., k=3). Specifically, the first HARQ-ACK codebook includes 3 HARQ feedback information groups corresponding to the 3 DCIs, including HARQ feedback information group a corresponding to DCI a, the HARQ inverse The feed information group A includes L ₀ HARQ feedback information, L ₀ Is the sum of the maximum number of data blocks scheduled by one DCI for the carriers in carrier set 0 configured by the network device. In the carrier set 0, the maximum number of data blocks scheduled by one DCI on each of the carrier 0 and the carrier 2 is 1, and the maximum number of data blocks scheduled by one DCI on each of the carrier 1 and the carrier 3 is 2, then L ₀ =2×1+2×2=6. The 6 pieces of HARQ feedback information include 1 piece of HARQ feedback information corresponding to carrier 0, 2 pieces of HARQ feedback information corresponding to carrier 1, 1 piece of HARQ feedback information corresponding to carrier 2, and 1 piece of HARQ feedback information corresponding to carrier 3. For example, one HARQ feedback information is 1 bit, a "1" is set to indicate successful reception of a corresponding data block, a "0" is set to indicate unsuccessful reception of a corresponding data block, and the HARQ feedback information group a includes 6 bits. If the terminal successfully receives the TBs in PDSCH 0 and PDSCH 1, for example, PDSCH 0 includes 1 TB and PDSCH 1 includes 2 TBs, the 6 bits in the HARQ feedback information set a are "111000", where the 1 st bit is the HARQ feedback information of one TB in PDSCH 0 on carrier 0, indicating that "1" indicates that one TB in PDSCH 0 is successfully received, the 2 nd and 3 rd bits are the HARQ feedback information of 2 TBs in PDSCH 1 on carrier 1, respectively, and the 2 nd bits each indicate that "1" indicates that 2 TBs in PDSCH 1 are all received. If the terminal does not successfully receive the TBs in PDSCH 0 and PDSCH 1, the bit corresponding to the TB indicates "0". While DCI a does not schedule PDSCH on carrier 2 and carrier 3, the 4 th bit corresponding to carrier 2 and the 5 th and 6 th bits corresponding to carrier 3 both indicate "0".

The 3 HARQ feedback information groups further include a HARQ feedback information group B corresponding to the DCI B, where the HARQ feedback information group B includes L ₁ HARQ feedback information, L ₁ Is the sum of the maximum number of data blocks scheduled by one DCI for the carriers in carrier set 1 configured by the network device. Assuming that the maximum number of data blocks scheduled by one DCI for each of carrier 4 to carrier 6 in carrier set 1 is 1 and the maximum number of data blocks scheduled by one DCI for carrier 7 is 2, L ₁ =3×1+2=5, the HARQ feedback information group B includes 5 HARQ feedback information including carrier 4, carrier 5, and carrier 6 minutesAnd the terminal determines that the other 4 HARQ feedback information indicates successful or unsuccessful receipt of the corresponding TB according to whether the corresponding TB is successfully received or not because the DCI B does not schedule the PDSCH on the carrier 6.

The 3 HARQ feedback information groups further include a HARQ feedback information group C corresponding to DCI C, which schedules PDSCH on carrier set 1, and thus includes L as well ₁ And the terminal determines the HARQ feedback information corresponding to each TB on the carrier 5 and the carrier 6 according to whether the corresponding TB is successfully received in the PDSCH on the carrier 5 and the carrier 6 or not.

According to the scheme, the terminal determines the corresponding HARQ feedback information number when the data channel on the carrier set is scheduled according to the sum of the maximum number of the data blocks scheduled by one DCI of the carrier in the carrier set configured by the network equipment. The size of the feedback information can be agreed by the network equipment and the terminal. The transmission reliability of the HARQ-ACK codebook can be improved.

The first DCI may further include a total downlink assignment index (T-DAI) indicating a total count value of DCIs in the DCIs of the scheduled N2 data channels up to the first listening occasion.

For example, the network device instructs HARQ feedback information of PDSCH scheduled by the four DCIs to be fed back in the first slot through DCI a, DCI B, DCI C and DCI D as shown in fig. 9, respectively. The comma in parentheses below the DCI shown in fig. 9 indicates the cumulative count value indicated by the C-DAI, and the comma indicates the total count value indicated by the T-DAI. In the monitoring time slot n, the C-DAI of DCI A indicates that the cumulative count value of DCI is 1, the C-DAI of DCI B indicates that the cumulative count value of DCI is 2, and when the monitoring time n is ended, the DCI A and the DCI B are subjected to cumulative count and the total count value is 2, the T-DAI in the DCI A and the DCI B both indicate that the total count value is 2. The C-DAI of DCI C indicates that the cumulative count value of DCI is 3, and the C-DAI of DCI D indicates that the cumulative count value of DCI is 4, so that 4 DCIs are cumulatively counted by the listening time n+k and the total count value is 4. If the terminal does not detect the DCI D, the terminal may determine that the DCI of the C-DAI indication 4 is not detected according to the total count value from the end of the T-DAI indication in the received DCI C to the listening occasion n+k being 4. The terminal may still determine that the first HARQ-ACK codebook includes 4 HARQ feedback information groups, so that the terminal is consistent with the network device's understanding of the size of the first HARQ-ACK codebook, and the network device may be able to successfully decode the first HARQ-ACK codebook even if the terminal does not detect DCI D.

In the second embodiment, the first C-DAI indicates the cumulative count value of the scheduled data channel in the N2 data channels up to the first DCI, where the N2 data channels are sequentially cumulative counted for the data channels in the same listening opportunity according to the order of the carrier identifiers of the carriers where the DCI scheduling the data channels in the N2 data channels is located from small to large, and then according to the chronological order of the listening opportunities to which the DCI belongs.

As shown in fig. 10, the network device transmits DCI a and DCI B on carrier 1 and carrier 4, respectively, in listening opportunity n, DCI a scheduling PDSCH 1 on carrier 2 and PDSCH 2 on carrier 3 across carriers. The DCI B schedules PDSCH 3 and PDSCH 4 on carrier 4 and carrier 5, respectively. The timing indications in both DCI a and DCI B indicate the terminal to transmit HARQ feedback information of PDSCH in the first slot. If the DCI in the listening opportunity n is the DCI that indicates the HARQ feedback information of the PDSCH transmitted in the first time slot, firstly, the DCI scheduled PDSCH with the smallest carrier identifier of the carrier in which the DCI is located is counted up, if the carrier identifier of the carrier in which the DCI a is located is 1 smaller than the carrier identifier 4 of the carrier in which the DCI B is located, firstly, the 2 PDSCHs scheduled by the DCI a are counted up, the counted value of the PDSCH 1 is 1, the counted value of the PDSCH 2 is 2, and if the counted value of the PDSCH is 2, the counted value of the PDSCH scheduled by the DCI a is 2. Or, the current monitoring time n is cut off, and the carrier identification of the carrier where the DCI is located is cut off to the DCI A from small to large, and the cumulative count value of the scheduled PDSCH is 2, so that the C-DAI in the DCI A indicates 2. Similarly, if the cumulative count value of PDSCH scheduled is 4 after DCI B, the C-DAI in DCI B indicates 4. After the listening occasion n, the next DCI sent by the network device indicating HARQ feedback information of PDSCH transmitted in the first slot is DCI C located on carrier 1 in the listening occasion n+k, which schedules PDSCH 5, PDSCH 6 and PDSCH 7 in carrier 1, carrier 2 and carrier 3 respectively for 3 PDSCHs, i.e. by cutting off the DCI C, the cumulative count value of PDSCH that has been scheduled is 7, and the C-DAI in the DCI C indicates 7. The terminal arranges the HARQ feedback information of the PDSCH transmitted in the first time slot according to the sequence from small to large of the accumulated count value indicated by the C-DAI in the dispatching DCI, wherein the HARQ feedback information of a plurality of data channels dispatched by the same DCI is arranged according to the sequence from small to large of the carrier identifications of the carriers where the data channels are positioned, so as to obtain a first HARQ-ACK codebook.

The first DCI may further include a T-DAI indicating a total count value of scheduled ones of the N2 data channels up to the first listening occasion.

For example, as shown in fig. 11, DCI a, DCI B, and DCI C indicate HARQ feedback information of PDSCH transmitted in a first slot in which HARQ feedback information of 7 PDSCH needs to be transmitted. By listening time n, the total number of PDSCH that have been scheduled in the 7 PDSCH is 4, then the T-DAI in DCI a and DCI B indicates 4, by listening time n+k, the total number of PDSCH that have been scheduled in the 7 PDSCH is 7, then the T-DAI in DCI C indicates 7. In other words, by the listening occasion n, the total number of PDSCHs scheduled by DCI (including DCI a and DCI B) indicating HARQ feedback information for transmitting PDSCH in the first slot is 4, and T-DCI in both DCI a and DCI B indicates 4. And by the listening occasion n+k, the total number of PDSCH scheduled by DCI (including DCI a, DCI B and DCI C) indicating HARQ feedback information for transmitting PDSCH in the first slot is 7, the T-DAI in DCI C indicates 7.

In the third embodiment, the first C-DAI indicates the cumulative count value of the data channel with the smallest carrier identifier of the carrier in the N1 data channels in the N2 data channels, where the N2 data channels are sequentially cumulative counts of the data channels scheduled in the same listening opportunity according to the order from small to large of the carrier identifiers of the carriers, and then sequentially cumulative counts according to the time sequence of the listening opportunities to which the DCI of the scheduled data channels belongs.

For example, as shown in fig. 12, DCI a, DCI B, and DCI C indicate HARQ feedback information of PDSCH transmitted in the first slot for a total of 3 DCIs. And the PDSCH scheduled by DCI A and DCI B in the monitoring time n are counted up in sequence according to the carrier identification of the carrier where the PDSCH is located from small to large, the accumulated count values of PDSCH 1 and PDSCH 2 scheduled by DCI A are respectively 1 and 2, and C-DAI in DCI A indicates the accumulated count value of PDSCH with the smallest accumulated count value in 2 PDSCHs scheduled by DCI A, namely the accumulated count value 1 of PDSCH 1. Alternatively, the C-DAI in DCI a indicates the cumulative count value of PDSCH with the smallest carrier identifier of the carrier in which the 2 PDSCHs are located, i.e., C-DAI indicates 1. Similarly, the C-DAI in DCI B indicates the cumulative count value of PDSCH with the smallest cumulative count value, i.e., the cumulative count value 3 of PDSCH 3. The DCI (including only DCI C) of the listening occasion n+k is tuned to 3 PSDCHs altogether, and the DCI C indicates that the cumulative count value 5 with the smallest cumulative count value among the 3 PDSCHs is scheduled according to the sequential cumulative count of the carrier identifiers of the carriers from small to large. The terminal orders the HARQ feedback information of the PDSCH transmitted in the first time slot according to the sequence from small to large of the accumulated count value indicated by the C-DAI in the dispatching DCI, wherein a plurality of data channels dispatched by the same DCI are arranged according to the sequence from small to large of the carrier identifications of the carriers where the data channels are located, so as to obtain a first HARQ-ACK codebook.

It should be noted that, in the second embodiment and the third embodiment, the first HARQ-ACK codebook obtained by the terminal may include K HARQ feedback information groups, each HARQ feedback information group may include L1 feedback information or L2 feedback information, and the specific embodiment may refer to the corresponding description in the first embodiment and will not be described herein for brevity.

In the example shown in fig. 12, the T-DAI indicated by each DCI is the same as the T-DAI value indicated by each DCI in the example shown in fig. 11.

Optionally, the carrier on which the data channel scheduled by the multi-carrier scheduling DCI in the embodiment of the present application is located belongs to a downlink carrier group, where the downlink carrier group corresponds to an uplink control channel, and HARQ feedback information of the data channel scheduled on the downlink carrier group is carried on the uplink control channel.

Taking fig. 5 as an example, the multi-carrier scheduling DCI a, DCI B and DCI C shown in fig. 5 schedule PDSCH on carriers 1 to 5, where carriers 1 to 5 belong to the same downlink carrier group, and one PUCCH corresponding to the downlink carrier group. Therefore, if the HARQ feedback information of PDSCH scheduled by DCI a, DCI B, and DCI C is carried on PUCCH, the HARQ feedback information is specifically carried on the PUCCH corresponding to the downlink carrier group in the first slot. When the terminal has the capability of uplink carrier aggregation, downlink carriers may be grouped, and HARQ feedback information of PDSCH on a downlink carrier in each downlink carrier group is carried on one PUCCH on one uplink carrier, i.e., each downlink carrier group corresponds to one PUCCH on one uplink carrier, where the PUCCH may be referred to as a PUCCH group (PUCCH group). For HARQ feedback information of PDSCH on the same downlink carrier set scheduled by the multi-carrier scheduling DCI to be transmitted in the first slot, the terminal may generate an HARQ-ACK codebook according to the foregoing embodiment, and send the HARQ-ACK codebook on the corresponding PUCCH of the downlink carrier set in the first slot.

In the above embodiment, the number of bits of C-DAI in DCIAnd the number of bits of the sum T-DAI +.>The number of PDSCH for maximum joint scheduling may be determined (if the DCI includes T-DAI).

Taking maximum joint scheduling of 8 PDSCHs as an example, the C-DAI and the T-DAI may each include 3-bit indication cumulative count value Y, i.eTaking C-DAI/T-DAI as an example for indicating the cumulative count value Y, table 1 shows an example of the corresponding relationship between the values of C-DAI and T-DAI, wherein>The leftmost bit of the C-DAI/T-DAI value in the table is the most significant bit, and the rightmost bit is the least significant bit.

TABLE 1

C-DAI/T-DAI value	Correspondence relation	Value of Y
			0，0，0	(Y-1)mod T _D +1＝1	The cumulative index value is: 1 or 9 or.
0，0，1	(Y-1)mod T _D +1＝2	The cumulative index value is: 2 or 10 or.
			0，1，0	(Y-1)mod T _D +1＝3	The cumulative index value is: 3 or 11 or.
0，1，1	(Y-1)mod T _D +1＝4	The cumulative index value is: 4 or 12 or.
			1，0，0	(Y-1)mod T _D +1＝5	The cumulative index value is: 5 or 13 or.
1，0，1	(Y-1)mod T _D +1＝6	The cumulative index value is: 6 or 14 or.
			1，1，0	(Y-1)mod T _D +1＝7	The cumulative index value is: 7 or 15 or.
1，1，1	(Y-1)mod T _D +1＝8	The cumulative index value is: 8 or 16 or.

In one embodiment, DCI scheduling N2 data channels each schedules a data channel on multiple carriers. In the same time slot, a HARQ-ACK codebook is generated by the HARQ feedback information of a data channel scheduled by the multi-carrier scheduling DCI. That is, the first HARQ-ACK codebook is a dedicated HARQ-ACK codebook carrying feedback information of a data channel scheduled by the multi-carrier scheduling DCI.

The feedback information transmitted in S402 may further include a second HARQ-ACK codebook including HARQ feedback information of N3 data channels, and DCI scheduling each of the N3 data channels schedules only one data channel.

That is, the N3 data channels are all data channels scheduled by single carrier scheduling DCI, which is DCI for scheduling one data channel on one carrier, and the DCI may be self-carrier scheduling DCI, that is, the DCI and the data channel scheduled by the DCI are located on the same carrier, or cross-carrier scheduling DCI, that is, the DCI and the data channel scheduled by the DCI are located on different carriers.

As shown in fig. 13, 3 pieces of multi-carrier scheduling DCI including DCI a, DCI B and DCI C in the listening occasion n+k1 in the listening time n indicate HARQ feedback information of the PDSCH transmitted in the first slot, and the C-DAI in the 3 pieces of multi-carrier scheduling DCI may be counted up in one of the foregoing embodiments one to three, and fig. 13 is an example of the 3 pieces of multi-carrier scheduling DCI being counted up in the manner provided in the foregoing embodiment one, and optionally, the multi-carrier scheduling DCI may further include a T-DAI, as shown in fig. 13. The terminal transmits feedback information in a first time slot, wherein the feedback information comprises a first HARQ-ACK codebook, and the first HARQ-ACK codebook comprises HARQ feedback information of 7 PDSCH scheduled by the 3 multi-carrier scheduling DCI which are arranged according to an accumulated count value indicated by a C-DAI. As shown in fig. 13, the network device also transmits single carrier scheduling DCI D, DCI E in listening occasions n, n+k2, respectively, and both DCI D and DCI E indicate that HARQ feedback information is transmitted in the first slot. The C-DAI in the single carrier scheduling DCI performs accumulated count on the single carrier scheduling DCI, and the single carrier scheduling DCI can also comprise T-DAI. The feedback information sent by the terminal in the first time slot further comprises a second HARQ-ACK codebook, wherein the second HARQ-ACK codebook comprises HARQ feedback information of PDSCH0 and PDSCH 8 which are arranged according to the accumulated count value indicated by the C-DAI.

The order of the arrangement of the first HARQ-ACK codebook and the second HARQ-ACK codebook in the feedback information may be pre-defined by a protocol or configured to the terminal by the network device through signaling. For example, the HARQ-ACK codebook of the PDSCH scheduled by the single carrier scheduling DCI may be predefined to be arranged before the HARQ-ACK codebook of the PDSCH scheduled by the multi carrier scheduling DCI, and then the second HARQ-ACK codebook is arranged before the first HARQ-ACK codebook in the feedback information, as shown in fig. 14. It should be noted that, in the implementation, the feedback information may be referred to as a HARQ-ACK codebook, and the first HARQ-ACK codebook and the second HARQ-ACK codebook may be one sub-codebook in the HARQ-ACK codebook, such as the first HARQ-ACK sub-codebook and the second HARQ-ACK sub-codebook, respectively.

The feedback information sent in S402 may further include a third HARQ-ACK codebook, where the third HARQ-ACK codebook includes HARQ feedback information for N4 data channels, and DCI for scheduling each of the N4 data channels schedules a plurality of data channels located in a plurality of time units. That is, the N3 data channels are all data channels scheduled by DCI scheduled by multiple time units, and the time units may be, but are not limited to, subframes, slots, mini-slots, or OFDM symbol groups. The multi-time unit scheduling DCI is DCI that schedules a plurality of data channels in a plurality of time units.

As shown in fig. 15, in addition to including the single carrier scheduling DCI and the multi-carrier scheduling DCI shown in fig. 13, the network device transmits, in the listening occasion n+k1, a DCI F which schedules the PDSCH 9 and the PDSCH 10 in two time units and which indicates that HARQ feedback information is transmitted in the first slot, C-DAI in the DCI F indicates 1, and C-DAI in the multi-time unit scheduling DCI performs cumulative counting for the multi-time unit DCI. The DCI F may also include a T-DAI. The feedback information sent by the terminal in the first slot further includes a third HARQ-ACK codebook including HARQ feedback information of PDSCH 9 and PDSCH 10 scheduled by the multi-time unit DCI. The arrangement order of the plurality of HARQ-ACK codebooks in the feedback information may be pre-defined by a protocol or configured by the network device through communication signaling. In the feedback information, the three HARQ-ACK codebooks may be sequentially arranged according to an arrangement order of the second HARQ-ACK codebook, the first HARQ-ACK codebook, and the third HARQ-ACK codebook.

In another embodiment, the first HARQ-ACK codebook includes HARQ feedback information for N4 data channels in addition to the feedback information for N2 data channels described above (i.e., feedback information for N2 data channels scheduled by the multi-carrier scheduling DCI), and DCI for each of the N4 data channels is scheduled for a plurality of data channels located in a plurality of time units, i.e., the first HARQ-ACK codebook further includes feedback information for N4 data channels scheduled by the multi-time unit scheduling DCI.

In this embodiment, the C-DAI in the multi-carrier scheduling DCI and the C-DAI in the multi-time unit scheduling DCI perform joint cumulative count on the multi-carrier scheduling DCI and the multi-time unit scheduling DCI.

The first C-DAI in the first DCI indicates an accumulated count value of the first DCI in G DCIs, where the G DCIs include DCI for scheduling N2 data channels and DCI for scheduling N4 data channels, where the G DCIs sequentially accumulated and counted in the same listening opportunity according to a sequence from small to large of indexes of serving cells of the DCIs, and then sequentially accumulated and counted according to a time sequence of listening opportunities to which the DCIs belong.

For example, as shown in fig. 15A, the network device transmits DCI a on carrier 0 and DCI B on carrier 2 in listening opportunity n. Where DCI a is a multi-time-unit scheduling DCI, PDSCH 0 and PDSCH 1 located at different time units are scheduled. DCI B is a multi-carrier scheduling DCI, scheduling PDSCH 2, PDSCH 3 and PDSCH 4 on different carriers. The C-DAI performs joint counting on the multi-carrier scheduling DCI and the multi-slot scheduling DCI. If the HARQ timing indications in DCI a and DCI B both indicate that the terminal transmits HARQ feedback information of PDSCH scheduled by DCI a and DCI B in the first slot, and DCI in the listening occasion n is DCI which indicates that HARQ feedback information of PDSCH is transmitted in the first slot at earliest time, since carrier identification of carrier where DCI a is located is 0 and less than carrier identification of carrier 2 where DCI B is located, the C-DAI in DCI a indicates that the cumulative count value of DCI is 1, and the C-DAI in DCI B indicates that the cumulative count value of DCI is 2. The network device transmits DCI C, which is multi-carrier scheduling DCI, and DCI D, which schedules PDSCH 5 and PDSCH 6 on different carriers, in listening occasion n+k. DCI D is a multi-time-element scheduling DCI, scheduling PDSCH 7 and PDSCH 8 located at different time elements. The HARQ timing instructions in DCI C and DCI D both indicate the terminal to send the HARQ feedback information of the PDSCH scheduled by DCI C and DCI D in the first time slot, and the carrier identification of the carrier where DCI C is smaller than the carrier identification 4 of the carrier where DCI D is, the accumulated count value of the C-DAI indication DCI in DCI C is 3, and the accumulated count value of the C-DAI indication DCI in DCI D is 4.

Optionally, the multi-carrier scheduling DCI and the multi-time unit scheduling DCI further include a T-DAI, where the T-DAI also jointly counts the multi-carrier scheduling DCI and the multi-time unit scheduling DCI, and the T-DAI indicates a total count value of DCIs in the G DCIs up to the current listening occasion.

As shown in fig. 15A, by the listening occasion n, the total count value of the multi-carrier scheduling DCI and the multi-time unit scheduling DCI transmitted by the network device in the first slot, which is feedback information of the scheduled PDSCH, is 2, i.e. includes DCI a and DCI B, and then T-DAI in DCI a and DCI B indicates 2. And by the monitoring time n+k, the total count value of the multi-carrier scheduling DCI and the multi-time unit scheduling DCI, which are sent by the network equipment and sent by the scheduled PDSCH in the first time slot, is 4, namely DCI A, DCI B, DCI C and DCI D are included, and then the T-DAI in DCI C and DCI in DCI D in the monitoring time n+k indicates 4.

The terminal device may determine a first HARQ-ACK codebook based on the C-DAI. The first HARQ-ACK codebook includes G HARQ feedback information groups corresponding to G DCIs for scheduling the N2 data channels and the N4 data channels, one HARQ feedback information group includes L3 HARQ feedback information, and L3 HARQ feedback information includes HARQ feedback information of a plurality of data channels scheduled by DCI corresponding to the HARQ feedback information group, where L3 is a maximum value of L4 and L5, L4 is a maximum number of data blocks scheduled by one multi-carrier scheduling DCI, and L5 is a maximum number of data blocks scheduled by multi-time unit scheduling DCI.

If the maximum number of data blocks that can be carried by one data channel is D, one multi-carrier scheduling DCI maximally schedules multiple carriersData channel, then the maximum number of data blocks that can be scheduled by one multi-carrier scheduling DCIOne multi-time unit scheduling DCI maximally schedules +_in multiple Time Units (TU)>Data channel, then maximum number of data blocks that can be scheduled by one multi-time cell scheduling DCI +.>L3=max (L4, L5), l3=l4 if L4 is greater than L5, l3=l5 if L4 is less than L5.

For example, one PDSCH can carry the maximum number of TBs d=2, and one multicarrier scheduling DCI can schedule at most 4 PDSCH on multiple carriers, i.e.L4=2×4=8. A multi-time cell scheduling DCI can schedule a maximum of 8 time cells, i.e +.>L5=2×8=16. Then L5 is greater than L4, l3=l5=16. As shown in the example of fig. 15A, if DCI a, DCI B, DCI C and DCI D are sent by the network device before the first slot, the 4 multi-carrier scheduling DCIs and the multi-time unit scheduling DCIs indicate that corresponding HARQ feedback information is sent in the first slot, i.e. g=4, and the maximum value of C-DAI in the 4 DCIs is 4, and if T-DAI is included, the maximum value of T-DAI is also 4. The terminal sends a first HARQ-ACK feedback codebook in a first time slot, wherein the first HARQ-ACK feedback codebook comprises 4 HARQ feedback information groups, the 4 HARQ feedback information groups and the 4 DCIs are sequentially corresponding according to the size of C-DAI, and each HARQ feedback information group comprises 16 feedback information. The HARQ feedback information group a of the 4 HARQ feedback information groups includes 16 HARQ feedback information corresponding to DCI a, where the 16 HARQ feedback information includes HARQ feedback information of TBs in PDSCH 0 and PDSCH 1 scheduled by DCI a, e.g., PDSCH 0 and PDSCH 1 each include 2 TBs, and then the 4 HARQ feedback information including TBs in PDSCH 0 and PDSCH 1 scheduled by DCI a, e.g., one HARQ feedback information is 1 to 1 The first 4 bits of the 16 HARQ feedback information may correspond to 2 TBs of PDSCH 0 and 2 TBs of PDSCH 1 in sequence. The 12 bits except the first 4 bits of the 16 HARQ feedback information are "0". The 4 HARQ feedback information groups further include a HARQ feedback information group B corresponding to DCI B, a HARQ feedback information group C corresponding to DCI C, and a HARQ feedback information group D corresponding to DCI D, and 16 feedback information in each HARQ feedback information group includes HARQ feedback information of a TB in a PDSCH scheduled by the corresponding DCI.

According to the scheme, the C-DAI is used for carrying out joint accumulated count on the multi-carrier scheduling DCI and the multi-time unit scheduling DCI, so that the terminal equipment can acquire accumulated counts of the multi-carrier scheduling DCI and the multi-time unit scheduling DCI sent by the network equipment, the size of the first HARQ-ACK codebook and the position of the HARQ feedback information in the codebook are determined based on the C-DAI, and the network equipment and the terminal equipment can agree on the size of the first HARQ-ACK codebook and the position of the HARQ feedback information in the codebook. The reliability of HARQ-ACK codebook transmission is improved. In one embodiment, when one or more data channels of a plurality of data channels scheduled by one multi-carrier scheduling DCI collide with a semi-statically configured uplink symbol or downlink symbol (i.e., the multi-carrier scheduling DCI indicates that the one or more data channels occupy the semi-statically configured uplink symbol or downlink symbol), the terminal device does not desire to receive the one or more data channels. In the first HARQ-ACK codebook, HARQ feedback information for the one or more data channels indicates that a data block in the data channel was not successfully received.

For example, the first DCI schedules multiple PDSCH on multiple carriers, where PDSCH 1 in the multiple PDSCH occupies symbols 2 to 7 in time slot s, where symbol 7 is a semi-statically configured uplink symbol, and the terminal does not receive the PDSCH 1. The HARQ feedback information of PDSCH 1 in the first HARQ-ACK codebook indicates that the data block in this PDSCH 1 was not successfully received.

Embodiments of the present application also provide a DCI for activating or deactivating a semi-persistent scheduling (semi-persistent scheduling, SPS) data channel on multiple carriers. An SPS data channel refers to a data channel that periodically occurs at certain time intervals after activation. The semi-persistent data channel may also be referred to as a semi-persistent scheduling (semi-static scheduling) data channel.

The network device may send a second DCI to the terminal, the second DCI to activate SPS data channels on P carriers, P being an integer greater than 1. After receiving the second DCI, the terminal may determine that SPS data channels on the P carriers are activated according to the second DCI. For example, if the SPS data channel on the P carriers is PDSCH, the terminal may receive downlink data on the SPS data channel in each period on the P carriers. Or the SPS data channels on the P carriers are PUSCH, the terminal may send uplink data on the SPS data channels on multiple carriers of the P carriers.

The DCI format (format) of the second DCI may be the same as the DCI format of the first DCI. The DCI format may include an indication field for indicating that the DCI of the DCI format transmitted by the network device is DCI for scheduling data channels on a plurality of carriers or DCI for activating SPS data channels on a plurality of carriers.

The network device may send a third DCI to the terminal, the third DCI to deactivate the SPS data channels on Q carriers, Q being an integer greater than 1. After the terminal receives the third DCI, it may determine, according to the third DCI, that the SPS data channels on the Q carriers are deactivated, that is, SPS data channels indicated by the third DCI no longer occur periodically on the Q carriers. The Q carriers may be part or all of the P carriers, or the Q carriers may include part of the P carriers and carriers other than the P carriers. Alternatively, the Q carriers may be carriers other than the P carriers.

The DCI format of the third DCI may be the same as the DCI format of the first DCI. An indication field may be included in the DCI format to indicate that the DCI of the DCI format is a DCI that schedules a data channel on a plurality of carriers or a DCI that deactivates an SPS data channel on a plurality of carriers.

In one embodiment, the DCI formats of the first DCI, the second DCI and the third DCI are all the same, and the DCI format includes an indication field 1, where the indication field 1 is used to indicate that DCI of the DCI format sent by the network device is DCI for scheduling data channels on multiple carriers, or DCI for activating or deactivating SPS data channels on multiple carriers.

For example, the indication field 1 may be 2 bits in the DCI, the 2 bits indicating that a first value indicates that the DCI of the DCI format is used to schedule data channels on multiple carriers, a second value indicates that the DCI of the DCI format is used for activation of SPS data channels on multiple carriers, and a third value indicates that the DCI of the DCI format is used for deactivation of SPS data channels on multiple carriers.

As another example, the indication field 1 may multiplex one or more indication fields in the current DCI. If the indication field 1 may include a frequency domain resource allocation (frequency domain resource assignment, FDRA) indication field and a modulation coding scheme (modulation and coding scheme, MCS) indication field, when all bits of the FDRA indication field are set to "0" and all bits of the MCS indication field are not all "1", the DCI may be indicated to be used for activation of the SPS data channel (i.e., the second DCI); when all bits of the MCS indication field are set to "1", it may indicate that the DCI is used for deactivation of the semi-persistent data channel (i.e., is the third DCI); when the FDRA indicates that the field is not all "0" and the MCS indicates that all bits of the field are not all "1", the DCI may be indicated to dynamically schedule a data channel on a multi-carrier.

It will be appreciated that, in order to implement the functions in the above embodiments, the base station and the terminal include corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the elements and method steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application scenario and design constraints imposed on the solution.

Fig. 16 and 17 are schematic structural diagrams of possible communication devices according to embodiments of the present application. These communication devices may be used to implement the functions of the terminal or the network device in the above method embodiments, so that the beneficial effects of the above method embodiments may also be implemented. In the embodiment of the present application, the communication device may be one of the terminals 120a-120j shown in fig. 1, or may be the network device 110a or 110b shown in fig. 1, or may be a module (such as a chip) applied to the terminal or the network device.

As shown in fig. 16, the communication device 1600 includes a processing unit 1610 and a transceiver unit 1620. The communication device 1600 is used to implement the functionality of a terminal or network device in the method embodiment shown in fig. 4 described above.

When the communication device 1600 is used to implement the functionality of a terminal in the method embodiment shown in fig. 4: the transceiver 1620 is configured to receive a first DCI from a network device, where the first DCI includes scheduling information of N1 data channels on W cells and a first cumulative downlink allocation index C-DAI, where W, N1 is an integer greater than 1 and W is less than or equal to N1. The processing unit 1610 is configured to determine feedback information including a first HARQ-ACK codebook, where the first HARQ-ACK codebook includes HARQ feedback information of N2 data channels, N2 is an integer greater than 1, N2 data channels include N1 data channels, and an arrangement order of HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook is determined according to the first C-DAI. The transceiver unit 1620 is further configured to send the feedback information to the network device.

When the communication apparatus 1600 is used to implement the functionality of the network device in the method embodiment shown in fig. 4: the transceiver 1620 is configured to send a first DCI to a terminal, where the first DCI includes scheduling information of N1 data channels on W cells and a first cumulative downlink allocation index C-DAI, where W, N1 is an integer greater than 1 and W is less than or equal to N1. And, the transceiver 1620 is further configured to receive feedback information from the terminal, where the feedback information includes a first HARQ-ACK codebook, the first HARQ-ACK codebook includes HARQ feedback information of N2 data channels, N2 is an integer greater than 1, and the N2 data channels include N1 data channels. The processing unit 1610 is configured to determine an arrangement order of HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook according to the first C-DAI.

For more details regarding the above-mentioned processing unit 1610 and transceiver unit 1620, reference is made to the relevant description in the method embodiment shown in fig. 4.

As shown in fig. 17, the communication device 1700 includes a processor 1710 and an interface circuit 1720. The processor 1710 and the interface circuit 1720 are coupled to each other. It is to be appreciated that interface circuit 1720 can be a transceiver or an input-output interface. Optionally, the communication device 1700 may further comprise a memory 1730 for storing instructions executed by the processor 1710 or for storing input data required by the processor 1710 to execute instructions or for storing data generated after the processor 1710 executes instructions.

When the communication device 1700 is used to implement the method shown in fig. 4, the processor 1710 is used to implement the functions of the processing unit 1610, and the interface circuit 1720 is used to implement the functions of the transceiver unit 1620.

When the communication device is a chip applied to the terminal, the terminal chip realizes the functions of the terminal in the embodiment of the method. The terminal chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal, and the information is sent to the terminal by the network equipment; alternatively, the terminal chip sends information to other modules in the terminal (e.g., radio frequency modules or antennas) that the terminal sends to the network device.

When the communication device is a module applied to the network device, the network device module implements the functions of the network device in the method embodiment. The network device module receives information from other modules (such as a radio frequency module or an antenna) in the network device, the information being transmitted to the network device by the terminal; alternatively, the network device module sends information to other modules in the network device (e.g., radio frequency modules or antennas) that the network device sends to the terminal. The network device module may be a baseband chip of the network device, or may be a DU or other module, where the DU may be a DU under an open radio access network (open radio access network, O-RAN) architecture.

It is to be appreciated that the processor in embodiments of the present application may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

The method steps in the embodiments of the present application may be implemented in hardware, or in software instructions executable by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access memory, flash memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. The storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a network device or terminal. The processor and the storage medium may reside as discrete components in a network device or terminal.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, e.g., floppy disk, hard disk, tape; but also optical media such as digital video discs; but also semiconductor media such as solid state disks. The computer readable storage medium may be volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage medium.

In the various embodiments of the application, if there is no specific description or logical conflict, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments according to their inherent logical relationships.

Claims

1. A hybrid automatic repeat request acknowledgement HARQ-ACK codebook feedback method, performed by a terminal or a module applied in the terminal, comprising:

receiving first Downlink Control Information (DCI) from network equipment, wherein the first DCI comprises scheduling information of N1 data channels on W cells and a first accumulated downlink allocation index (C-DAI), W, N1 is an integer greater than 1, and W is less than or equal to N1;

and sending feedback information to the network equipment, wherein the feedback information comprises a first hybrid automatic repeat request (HARQ-ACK) codebook, the first HARQ-ACK codebook comprises HARQ feedback information of N2 data channels, N2 is an integer greater than or equal to N1, the N2 data channels comprise N1 data channels, and the arrangement sequence of the HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook is determined according to the first C-DAI.

2. The method of claim 1 wherein the first C-DAI indicates an accumulated count value of the first DCI in the DCI for scheduling the N2 data channels, wherein the DCI for scheduling the N2 data channels is sequentially accumulated for the DCI in the same listening occasion in order of small to large serving cell index of the cell, and is sequentially accumulated in order of time sequence of the listening occasions to which the DCI belongs.

3. The method of claim 2, wherein if a plurality of DCIs in the same listening occasion and on the same cell in the DCI scheduling the N2 data channels, the plurality of DCIs are counted in order of from small to large or from large to small in order of a serving cell index of a cell in which a reference data channel scheduled by each of the plurality of DCIs located, wherein the reference data channel scheduled by the DCI is a data channel with a smallest serving cell index of the cell in which the data channel scheduled by the DCI is located, or the reference data channel is a data channel used for determining a time unit for transmitting HARQ feedback information in the data channel scheduled by the DCI.

4. The method of claim 1, wherein the first C-DAI indicates that the first DCI is terminated, and an accumulated count value of a scheduled data channel of the N2 data channels is an accumulated count value of the data channels scheduled by the first, in the same listening occasion, according to a sequence from a small serving cell index of a cell where the DCI scheduling the data channel is located to a large serving cell index, and then, according to a chronological sequence of the listening occasion where the DCI is located, the data channels scheduled by the DCI are sequentially accumulated and counted.

5. The method of any one of claims 1 to 4, wherein the first DCI further includes a downlink allocation total index T-DAI,

the T-DAI indicates that the total count value of the scheduled data channels in the N2 data channels is cut off to a first monitoring occasion, wherein the first monitoring occasion is the monitoring occasion where the first DCI is located; or,

the T-DAI indicates that a total count value of DCIs for the N2 data channels is scheduled until the first listening occasion.

6. The method of any of claims 1 to 5, wherein scheduling the DCI for the N2 data channels each schedules a plurality of data channels on a plurality of cells.

7. The method of claim 6, wherein the first HARQ-ACK codebook comprises K HARQ feedback information groups, wherein K is a number of DCIs scheduling the N2 data channels, one of the HARQ feedback information groups comprises L1 HARQ feedback information, and the L1 HARQ feedback information comprises HARQ feedback information of one DCI scheduled data channel, wherein L1 is a maximum number of data blocks scheduled by one DCI, L1 is greater than or equal to N1, and the data channels are used to carry at least one data block.

8. The method of claim 6 wherein the first HARQ-ACK codebook includes K feedback information groups, one of the HARQ feedback information groups includes L2 HARQ feedback information, and the L2 HARQ feedback information includes HARQ feedback information of a data channel group to which a DCI scheduled data channel belongs, L2 being less than or equal to N1, L2 being a maximum number of data channel groups of one DCI scheduled data channel.

9. A hybrid automatic repeat request acknowledgement HARQ-ACK codebook feedback method performed by a network device or a module applied in the network device, comprising:

transmitting first Downlink Control Information (DCI) to a terminal, wherein the first DCI comprises scheduling information of N1 data channels on W cells and a first accumulated downlink allocation index (C-DAI), W, N1 is an integer greater than 1, and W is less than or equal to N1;

receiving feedback information from the terminal, wherein the feedback information comprises a first hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook, the first HARQ-ACK codebook comprises HARQ feedback information of N2 data channels, N2 is an integer greater than or equal to N1, the N2 data channels comprise the N1 data channels, and the arrangement sequence of the HARQ feedback information of the N1 data channels in the first HARQ-ACK codebook is determined according to the first C-DAI.

10. The method of claim 9 wherein the first C-DAI indicates an accumulated count value of the first DCI in the DCI for scheduling the N2 data channels, wherein the DCI for scheduling the N2 data channels is sequentially accumulated for the DCI in the same listening occasion in order of small to large serving cell index of the cell, and is sequentially accumulated in order of time sequence of the listening occasions to which the DCI belongs.

11. The method of claim 10, wherein if a plurality of DCIs in DCIs scheduling the N2 data channels are on the same listening occasion and on the same cell, the plurality of DCIs are sequentially counted in order of from small to large or from large to small in serving cell index of a cell in which a reference data channel scheduled by each DCI in the plurality of DCIs is located,

the reference data channel of the DCI schedule is a data channel with the smallest serving cell index of a cell where the DCI schedule is located, or the reference data channel is a data channel used for determining a time unit for transmitting HARQ feedback information in the data channel of the DCI schedule.

12. The method of claim 9, wherein the first C-DAI indicates that the first DCI is terminated, and the N2 data channels are accumulated counts of data channels already scheduled in the N2 data channels, wherein the N2 data channels are accumulated counts of the data channels scheduled by the DCI in the same listening occasion in the order of from small to large serving cell indexes of cells in which the DCI schedules the data channels, and then are sequentially accumulated counts of the data channels in the chronological order of the listening occasions to which the DCI belongs.

13. The method of any one of claims 9 to 12, wherein the first DCI further includes a downlink allocation total index T-DAI,

the T-DAI indicates a total count value of scheduled data channels in the N2 data channels up to a first monitoring occasion, wherein the first monitoring occasion is a monitoring occasion for receiving the first DCI; or,

14. The method of any of claims 9 to 13, wherein scheduling the DCI for the N2 data channels each schedules a plurality of data channels on a plurality of cells.

15. The method of claim 14, wherein the first HARQ-ACK codebook comprises K HARQ feedback information groups, wherein K is a number of DCIs scheduling the N2 data channels, one of the HARQ feedback information groups comprises L1 HARQ feedback information, and the L1 HARQ feedback information comprises HARQ feedback information of one DCI scheduled data channel, wherein L1 is a maximum number of data blocks scheduled by one DCI, L1 is greater than or equal to N1, and the data channels are used to carry at least one data block.

16. The method of claim 14, wherein the first HARQ-ACK codebook includes K feedback information groups, one of the HARQ feedback information groups includes L2 HARQ feedback information, and the L2 HARQ feedback information includes HARQ feedback information of a data channel group to which a DCI scheduled data channel belongs, L2 being less than or equal to N1, L2 being a maximum number of data channel groups of one DCI scheduled data channel.

17. A communication device comprising a processor and interface circuitry for receiving signals from other communication devices and transmitting signals to the processor or for sending signals from the processor to other communication devices, the processor being configured to implement the method of any one of claims 1 to 16 by logic circuitry or execution of code instructions.

18. A computer readable storage medium, characterized in that the storage medium has stored therein a computer program or instructions which, when executed by a communication device, implement the method of any of claims 1 to 16.