WO2019223436A1

WO2019223436A1 - Method and device for sending and receiving codebook information

Info

Publication number: WO2019223436A1
Application number: PCT/CN2019/081775
Authority: WO
Inventors: 李胜钰; 官磊; 马蕊香; 吕永霞; 邵家枫
Original assignee: 华为技术有限公司
Priority date: 2018-05-21
Filing date: 2019-04-08
Publication date: 2019-11-28
Also published as: CN110519019A; CN110519019B

Abstract

A method and device for sending and receiving codebook information, used for reducing downlink transmission delay. The method for sending codebook information comprises: receiving at least one physical downlink data channel in a candidate receiving opportunity within a first time unit set, the first time unit set comprising M candidate receiving opportunities, the M candidate receiving opportunities being divided into a first candidate receiving opportunity subset and a second candidate receiving opportunity subset according to codebook identification information, first codebook identification information comprised in the codebook identification information corresponding to the first candidate receiving opportunity subset, and second codebook identification information corresponding to the second candidate receiving opportunity subset; generating a feedback information codebook according to the receiving state of the at least one physical downlink data channel, the feedback information codebook comprising a first codebook and a second codebook, the first codebook corresponding to the first candidate receiving opportunity subset, and the second codebook corresponding to the second candidate receiving opportunity subset; and sending the first codebook and/or the second codebook in a second time unit.

Description

Method and device for sending and receiving codebook information

This application claims the priority of a Chinese patent application filed on May 21, 2018 with the Chinese Patent Office, application number 201810491261.6, and application name "A Method and Device for Sending and Receiving Codebook Information", the entire contents of which are incorporated by reference Incorporated in this application.

Technical field

The present application relates to the field of mobile communication technology, and in particular, to a method and device for sending and receiving codebook information.

Background technique

Hybrid automatic repeat request (HARQ) is an efficient transmission mechanism. On the one hand, the reliability of downlink data transmission can be greatly improved through retransmissions. On the other hand, the terminal equipment feedbacks the HARQ to the base station. Acknowledgement (ACK) / Negative Acknowledgement (NACK). Only when the terminal equipment feedbacks NACK, the base station needs to retransmit, which reduces the overall resource consumption of data transmission.

Currently, the 3rd Generation Partnership Project (3GPP) has determined in the new radio (NR) standard that the ACK / NACK that is fed back in a slot needs to be jointly coded as 1 HARQ- The ACK codebook uses 1 physical uplink control channel (PUCCH) resource for feedback, but this is not conducive to reducing the feedback delay of ACK / NACK. For example, please refer to FIG. 1, the subcarrier interval used for downlink transmission is 30kHz, and the subcarrier interval used for uplink transmission is 15kHz. Limited by the data decoding capability of the terminal device, the ACK / NACK of the physical downlink shared channel (PDSCH) 1 can be fed back at the fastest symbol at the beginning of the second uplink time slot in FIG. 1, However, the fastest-scheduled ACK / NACK for PDSCH2 can only be fed back at the end of the second time slot of the uplink. In this way, since the ACK / NACK in one time slot needs joint coding feedback, the ACK / NACK of PDSCH1 will be delayed. If the ACK / NACK of PDSCH1 is NACK, the retransmission of PDSCH1 by the base station will be delayed accordingly. As shown in Figure 1, if the ACK / NACK of PDSCH1 can get timely feedback, the retransmission of PDSCH1 should occur at the position shown by "×", but because the ACK / NACK of PDSCH1 is delayed, the retransmission of PDSCH1 It can only occur at the position indicated by "√". Obviously, the current ACK / NACK feedback method has a great impact on the transmission delay of downlink data.

Summary of the Invention

The embodiments of the present application provide a method and device for sending and receiving codebook information, which are used to reduce downlink transmission delay.

According to a first aspect, a method for transmitting codebook information is provided. The method may be executed by a communication device, such as a terminal device or a chip provided in the terminal device. The method includes receiving at least one physical downlink data channel at a candidate receiving opportunity in a first set of time units, the first set of time units including M candidate receiving opportunities, where M is an integer greater than 1, and the M candidates The receiving timing is divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information, where the codebook identification information includes the first codebook identification information and the second codebook identification information. The first candidate reception timing subset corresponds to the first codebook identification information, the second candidate reception timing subset corresponds to the second codebook identification information; and according to the reception of the at least one physical downlink data channel The state generates a feedback information codebook, the feedback information codebook includes a first codebook and a second codebook, the first codebook corresponds to the first subset of candidate reception opportunities, and the second codebook corresponds to all The second candidate receiving opportunity subset corresponds; the first codebook and / or the second codebook are sent in a second time unit.

Accordingly, in a second aspect, a method for receiving codebook information is provided. The method may be executed by a communication device, such as a network device, such as a base station. The method includes: sending at least one physical downlink data channel in a candidate receiving opportunity in a first set of time units, the first set of time units including M candidate receiving opportunities, where M is an integer greater than 1, and the M candidates The receiving timing is divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information, where the codebook identification information includes the first codebook identification information and the second codebook identification information. The first candidate receiving opportunity subset corresponds to the first codebook identification information, the second candidate receiving opportunity subset corresponds to the second codebook identification information; the first codebook and And / or a second codebook, where the first codebook corresponds to the first candidate receiving opportunity subset, and the second codebook corresponds to the second candidate receiving opportunity subset.

In the embodiment of the present application, the M candidate receiving opportunities can be divided into a first candidate receiving opportunity subset and a second candidate receiving opportunity subset, and then the feedback information of the physical downlink data channel can be divided into different codebooks accordingly. Therefore, the first codebook and the second codebook can be processed separately, and it is not necessary to send all feedback information as one codebook. Therefore, the method provided in the embodiment of the present application can effectively reduce the delay in sending feedback information, thereby Therefore, the transmission delay of the downlink data is correspondingly reduced.

In a possible design, each of the M candidate receiving opportunities corresponds to a first parameter group, where the first parameter group includes codebook identification information and includes at least one of the following information: physical The timing offset between the downlink data channel and the physical downlink control channel, the time domain location information of the physical downlink data channel, and the physical downlink data channel mapping type.

For example, the first parameter group may include codebook identification information, and also include timing offsets between the physical downlink data channel and the physical downlink control channel, time domain location information of the physical downlink data channel, and PDSCH mapping types. A parameter group includes codebook identification information, a timing offset between a physical downlink data channel and a physical downlink control channel, time domain location information of the physical downlink data channel, and a physical downlink data channel mapping type. Alternatively, the first parameter group may include The codebook identification information also includes two of the timing offset between the physical downlink data channel and the physical downlink control channel, the time domain location information of the physical downlink data channel, and the physical downlink data channel mapping type. For example, the first parameter group Including codebook identification information, timing offset between the physical downlink data channel and the physical downlink control channel, and time domain location information of the physical downlink data channel, or the first parameter group may include codebook identification information and also include physical downlink data Timing offset between channel and physical downlink control channel, physical Domain location information and one physical downlink data channel mapping types when the line data channel, for example, the first codebook parameters includes identification information and a physical downlink data channel domain location information.

In a possible design, each of the M candidate receiving opportunities corresponds to a second parameter group, where the second parameter group includes a physical downlink data channel mapping type and includes at least one of the following information : A timing offset between a physical downlink data channel and a physical downlink control channel, and time domain location information of the physical downlink data channel, wherein the codebook identification information corresponds to the physical downlink data channel mapping type.

For example, the second parameter group may include a physical downlink data channel mapping type, and also includes a timing offset between the physical downlink data channel and the physical downlink control channel and time domain location information of the physical downlink data channel. The group includes the physical downlink data channel mapping type, the timing offset between the physical downlink data channel and the physical downlink control channel, and the time domain location information of the physical downlink data channel. Alternatively, the second parameter group may include the PDSCH mapping type and also includes the physical One of the timing offset between the downlink data channel and the physical downlink control channel and the time domain location information of the physical downlink data channel. For example, the second parameter group includes the physical downlink data channel mapping type and the time domain of the physical downlink data channel. location information.

In a possible design, each of the M candidate receiving opportunities corresponds to a third parameter group, and the third parameter group includes time domain location information of a physical downlink data channel, and may further include the following information: At least one of: a timing offset between a physical downlink data channel and a physical downlink control channel, and a physical downlink data channel mapping type, wherein the codebook identification information corresponds to time domain location information of the physical downlink data channel.

For example, the third parameter group may include time domain location information of the physical downlink data channel, and also includes two types of timing offset between the physical downlink data channel and the physical downlink control channel and a physical downlink data channel mapping type. The group includes the physical downlink data channel mapping type, the timing offset between the physical downlink data channel and the physical downlink control channel, and the time domain location information of the physical downlink data channel. Alternatively, the third parameter group may include the time domain location of the physical downlink data channel. The information also includes one of a timing offset between the physical downlink data channel and the physical downlink control channel and a mapping type of the physical downlink data channel. For example, the third parameter group includes information between the physical downlink data channel and the physical downlink control channel. Timing offset and time domain location information of the physical downlink data channel.

In a possible design, the codebook identification information corresponds to the time domain location information of the physical downlink data channel, and may include at least one of the following two correspondences: 1. Codebook identification information and physical downlink data The number of the start symbol of the channel corresponds; 2. The codebook identification information corresponds to the time domain length of the physical downlink data channel.

That is, when a parameter group is configured for a candidate receiving opportunity, the codebook identification information can be explicitly configured in the parameter group, so that the terminal device can more clearly determine the candidate receiving timing unit to which the candidate receiving opportunity belongs. Alternatively, the codebook identification information may not be configured in the parameter group corresponding to the candidate receiving opportunity, but the correspondence relationship between the codebook identification information and some or all parameters in the parameter group corresponding to the candidate receiving opportunity may be configured in advance. Then, after obtaining the parameter group corresponding to the candidate receiving opportunity, the terminal device can also determine the codebook identification information of the candidate receiving opportunity according to some and all parameters included in the parameter group. In this way, the parameter group can be reduced. The number of parameters included. As for which part of the parameter group of the codebook identification information corresponds to the parameter group, it can be configured by the network device itself, or it can be predefined by the protocol without specific restrictions.

In a possible design, sending the first codebook and / or the second codebook in the second time unit includes: the first candidate receiving opportunity subset and the second time unit A second association exists, and the second candidate receiving opportunity subset does not exist in the second time unit, and the second code unit is sent in the second time unit; or The second candidate receiving opportunity subset does not have a second association relationship with the second time unit, and the second candidate receiving opportunity subset has the second association relationship with the second time unit. Sending the second codebook at a second time unit; or, the second candidate receiving opportunity subset has a second association with the second time unit, and the second candidate receiving opportunity subset is related to the first The second association exists in two time units, and the first codebook and / or the second codebook are sent in the second time unit. Correspondingly, receiving the first codebook and / or the second codebook in the second time unit includes: the first candidate reception timing subset has a second association with the second time unit Relationship, and the second candidate receiving timing subset does not have the second association relationship with the second time unit, and the first codebook is received at the second time unit; or the first candidate There is no second association between the subset of receiving timings and the second time unit, and the second association between the second candidate receiving timing subset and the second time unit exists. In the second time unit, Receiving the second codebook; or, the second candidate receiving opportunity subset has a second association with the second time unit, and the second candidate receiving opportunity subset and the second time unit exist The second association relationship receives the first codebook and / or the second codebook in the second time unit.

It can be understood that if a terminal device receives a third physical downlink control channel, the third physical downlink data channel scheduled by the third physical downlink control channel belongs to the first candidate receiving opportunity subset, and the third physical downlink The control channel indicates that the feedback information corresponding to the third physical downlink data channel is sent in the second time unit, and then there is a second association relationship between the first candidate reception timing subset and the second time unit. Correspondingly, if the terminal device does not receive the scheduled physical downlink data channel belonging to the first candidate reception timing subset, and the feedback information corresponding to the indicated scheduled physical downlink data channel is sent in the second time unit , That is, if the terminal device does not receive such a physical downlink control channel, the second candidate receiving opportunity subset and the second time unit do not have a second association relationship.

Correspondingly, if a terminal device receives a fourth physical downlink control channel, the fourth physical downlink data channel scheduled by the fourth physical downlink control channel belongs to the second subset of candidate timings, and the fourth physical downlink control channel Indicating that the feedback information corresponding to the fourth physical downlink data channel is sent in the second time unit, the second candidate receiving opportunity subset has a second association relationship with the second time unit. Correspondingly, if the terminal device does not receive the scheduled physical downlink data channel belonging to the second candidate receiving opportunity subset and the feedback information corresponding to the indicated scheduled physical downlink data channel is sent in the second time unit Physical downlink control channel, that is, the terminal device does not receive such a physical downlink control channel, the second candidate receiving opportunity subset does not have a second association relationship with the second time unit.

In a possible design, sending the first codebook and / or the second codebook in the second time unit includes: a first physical uplink channel and a bearer carrying the first codebook. When the second physical uplink channel of the second codebook does not overlap in the time domain in the second time unit, sending the first codebook on the first physical uplink channel, and on the second The physical uplink channel sends the second codebook; and / or, the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook are in the second time unit When the middle time domain overlaps, the first codebook is sent on the first physical uplink channel, or the second codebook is sent on the second physical uplink channel. Correspondingly, receiving the first codebook and / or the second codebook in the second time unit includes: carrying the first physical uplink channel carrying the first codebook and carrying the second codebook. If the second physical uplink channel of the codebook does not overlap in the time domain in the second time unit, receiving the first codebook on the first physical uplink channel and receiving on the second physical uplink channel The second codebook; and / or, the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in time domain in the second time unit In the case, the first codebook is received on the first physical uplink channel, or the second codebook is received on the second physical uplink channel.

This can be understood as:

Sending the first codebook on the first physical uplink channel if the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook do not overlap in the time domain in the second time unit, And sending the second codebook on the second physical uplink channel, and when the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in the time domain in the second time unit Next, send the first codebook on the first physical uplink channel, or send the second codebook on the second physical uplink channel.

Alternatively, the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook do not overlap in time domain in the second time unit, the first codebook is transmitted on the first physical uplink channel, and The second physical uplink channel sends the second codebook, or the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in time domain in the second time unit, and in the first physical unit Send the first codebook on the uplink channel, or send the second codebook on the second physical uplink channel.

That is, if the first physical uplink channel and the second physical uplink channel do not overlap in the time domain within the second time unit, the terminal device may send the first codebook on the first physical uplink channel and the second codebook on the second physical uplink channel. The physical uplink channel sends the second codebook. The two may not interfere with each other, which can ensure the transmission quality. If the first physical uplink channel and the second physical uplink channel overlap in the time domain within the second time unit, the terminal device can send the first codebook only on the first physical uplink channel, but not on the second physical uplink channel. The second codebook, or the second codebook is sent only on the second physical uplink channel, and the first codebook is not sent on the first physical uplink channel, thereby minimizing transmission interference and improving transmission quality. Further, if the first physical uplink channel and the second physical uplink channel overlap in the time domain within the second time unit, the terminal device may select the first codebook and the second codebook according to a high-level configuration or a predefined priority. Send a codebook with a higher priority. For example, when the first codebook has a higher priority than the second codebook, the terminal device can send the first codebook only on the first physical uplink channel, and not on the second physical uplink channel. Two codebooks, so as to ensure that high priority codebooks can be transmitted with priority.

In a possible design, a first association relationship exists between the second time unit and the first time unit set, and the first association relationship is the first time unit configured or predefined by high-level signaling. A semi-static correspondence between the set and the second time unit; and / or, the second association is a dynamic correspondence between a physical downlink data channel indicated by a physical downlink control channel and the second time unit relationship.

The first association relationship can be understood as a semi-static correspondence relationship. For the semi-static correspondence relationship, it can be understood as: a high-level signaling configuration or a predefined timing offset value between PDSCH and the corresponding ACK / NCK, that is, PDSCH-to- The possible value set of HARQ-Timing, that is, the value set of K1, the difference between the number of the second time unit and the number of any time unit included in the first time unit set should belong to the K1 value set.

In a possible design, the number of bits in the first codebook is determined according to the maximum number of candidate reception opportunities in the first candidate reception opportunity subset that do not overlap in the time domain. The number of bits is determined according to the maximum number of candidate receiving opportunities in the second candidate receiving opportunity subset that do not overlap in the time domain.

That is, in a subset of candidate reception opportunities, the candidate reception opportunities that overlap in the time domain are divided into multiple candidate reception units, and each candidate reception unit includes multiple candidate reception opportunities that overlap in the time domain. These The candidate reception timings with overlapping time domains cannot be transmitted at the same time, so only a corresponding ACK / NACK is needed, which can reduce the amount of feedback data. Of course, this description in this article is based on the example that the first time unit set belongs to one downlink frequency unit. If the first time unit set belongs to multiple downlink frequency units, for each downlink frequency unit, the method described in this article can be used. Determine the number of bits in the codebook.

According to a third aspect, a first communication device is provided. The communication device is, for example, a terminal device. The communication device has the function of realizing the terminal equipment in the above method design. These functions can be implemented by hardware, or they can be implemented by hardware to execute corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In a possible design, the specific structure of the communication device may include a processor and a transceiver. The processor and the transceiver may perform corresponding functions in the method provided by the first aspect or any one of the possible designs of the first aspect.

According to a fourth aspect, a second communication device is provided. The communication device is, for example, a network device. The communication device has the function of implementing the network equipment in the above method design. These functions can be implemented by hardware, or they can be implemented by hardware to execute corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In a possible design, the specific structure of the communication device may include a transceiver, and may further include a processor. The processor and the transceiver may perform corresponding functions in the method provided by the second aspect or any one of the possible designs of the second aspect.

According to a fifth aspect, a third communication device is provided. The communication device is, for example, a terminal device. The communication device has the function of realizing the terminal equipment in the above method design. These functions can be implemented by hardware, or they can be implemented by hardware to execute corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In a possible design, the specific structure of the communication device may include a processing module and a transceiver module. The processing module and the transceiver module may perform corresponding functions in the method provided by the first aspect or any possible design of the first aspect.

According to a sixth aspect, a fourth communication device is provided. The communication device is, for example, a network device. The communication device has the function of implementing the network equipment in the above method design. These functions can be implemented by hardware, or they can be implemented by hardware to execute corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In a possible design, the specific structure of the communication device may include a transceiver module, and may further include a processing module. The processing module and the transceiver module may perform corresponding functions in the method provided by the second aspect or any one of the possible designs of the second aspect.

In a seventh aspect, a fifth communication device is provided. The communication device may be a terminal device in the above method design, or a chip provided in the terminal device. The communication device includes: a memory for storing computer executable program code; and a processor, the processor being coupled to the memory. The program code stored in the memory includes instructions. When the processor executes the instructions, the communication device is caused to execute the foregoing first aspect or a method in any one of the possible designs of the first aspect.

In an eighth aspect, a sixth communication device is provided. The communication device may be a network device designed in the above method, or a chip provided in the network device. The communication device includes: a memory for storing computer executable program code; and a processor, the processor being coupled to the memory. The program code stored in the memory includes instructions. When the processor executes the instructions, the communication device is caused to execute the foregoing first aspect or a method in any one of the possible designs of the first aspect.

In a ninth aspect, a communication system is provided. The communication system may include the communication device described in the third aspect, the fifth aspect, or the seventh aspect, and the communication device described in the fourth aspect, the sixth aspect, or the eighth aspect. , Wherein, in the communication system, the communication device described in the third aspect, the fifth aspect, or the seventh aspect is referred to as a first communication device, and the communication device described in the fourth aspect, the sixth aspect, or the eighth aspect is referred to as Is a second communication device, that is, the communication system includes a first communication device and a second communication device. The first communication device is configured to receive at least one physical downlink data channel at a candidate receiving opportunity in a first set of time units. The first set of time units includes M candidate receiving opportunities, where M is an integer greater than 1, The M candidate receiving timings are divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to codebook identification information, where the codebook identification information includes the first codebook identification information and the second code This identification information, the first candidate receiving opportunity subset corresponding to the first codebook identification information, the second candidate receiving opportunity subset corresponding to the second codebook identification information, according to the at least one physical A feedback information codebook is generated in the receiving state of the downlink data channel. The feedback information codebook includes a first codebook and a second codebook, and the first codebook corresponds to the first subset of candidate reception opportunities. A second codebook corresponding to the second subset of candidate reception timings, and sending the first codebook and / or the second codebook in a second time unit; a second communication device for At least one physical downlink data channel is sent in the candidate receiving opportunities in the set. The first set of time units includes M candidate receiving opportunities, where M is an integer greater than 1, and the M candidate receiving opportunities are divided according to codebook identification information. Is a subset of the first candidate reception timing and a subset of the second candidate reception timing, wherein the codebook identification information includes first codebook identification information and second codebook identification information, and the first candidate reception timing subset and The first codebook identification information corresponds, the second candidate receiving timing subset corresponds to the second codebook identification information, and the first codebook and / or the second codebook are received in a second time unit, the A first codebook corresponds to the first candidate reception timing subset, and the second codebook corresponds to the second candidate reception timing subset.

According to a tenth aspect, a computer storage medium is provided. The computer-readable storage medium stores instructions, and when the computer-readable storage medium runs on the computer, the computer is caused to execute the first aspect or any one of the possible designs of the first aspect. The method described.

According to an eleventh aspect, a computer storage medium is provided. The computer-readable storage medium has instructions stored thereon, which when run on a computer, causes the computer to execute the second aspect or any one of the possible designs of the second aspect. As described in the method.

According to a twelfth aspect, a computer program product containing instructions is provided. The computer program product stores instructions, and when the computer program product runs on the computer, the computer causes the computer to execute the first aspect or any one of the first aspect. The method described in the design.

According to a thirteenth aspect, a computer program product containing instructions is provided. The computer program product stores instructions, and when the computer program product runs on a computer, causes the computer to execute any one of the second aspect or the second aspect. The method described in the design.

In the embodiment of the present application, the feedback information can be divided into different codebooks, so that the first codebook and the second codebook can be processed separately. It is not necessary to send all feedback information as one codebook in a unified manner. The method provided by the embodiment can effectively reduce the transmission delay of the feedback information, thereby reducing the transmission delay of the downlink data accordingly.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of sending ACK / NACK in the prior art;

2 is a schematic diagram of segmenting a PDSCH included in a time slot;

3 is a schematic diagram of an application scenario according to an embodiment of the present application;

4 is a flowchart of a method for sending and receiving codebook information according to an embodiment of the present application;

5A-5D are schematic diagrams of terminal equipment sending codebook information when the first physical uplink channel and the second physical uplink channel do not overlap in the time domain in the embodiment of the present application;

6A-6B are schematic diagrams of terminal equipment sending codebook information when the first physical uplink channel and the second physical uplink channel overlap in the time domain in the embodiment of the present application;

7 is a flowchart of a method for sending and receiving codebook information based on the method shown in FIG. 4 according to an embodiment of the present application;

8 is a schematic diagram of segmenting a PDSCH included in a time slot according to an embodiment of the present application;

9 is a schematic diagram of sending codebook information according to the method shown in FIG. 7 according to an embodiment of the present application;

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

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

12A-12B are schematic diagrams of two structures of a communication device according to an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

In the following, some terms in the embodiments of the present application are explained so as to facilitate understanding by those skilled in the art.

1) Terminal devices, including devices that provide voice and / or data connectivity to users, may include, for example, a handheld device with a wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via a radio access network (RAN) and exchange voice and / or data with the RAN. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, subscriber unit, subscriber station, mobile station, mobile station, remote station Station (remote station), access point (access point (AP)), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), or user Equipment (user device) and so on. For example, it may include a mobile phone (or "cellular" phone), a computer with a mobile terminal device, a portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile device, a smart wearable device, and the like. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants, PDA), etc. It also includes restricted devices, such as devices with lower power consumption, devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners, smart printers, train detectors, gas stations and other equipment. The main functions of the terminal equipment include collecting data (some terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves to transmit uplink data to the network equipment.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices can also be referred to as wearable smart devices, which are the general name for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a device that is worn directly on the body or is integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also powerful functions through software support, data interaction, and cloud interaction. Broad-spectrum wearable smart devices include full-featured, large-sized, full or partial functions that do not rely on smart phones, such as smart watches or smart glasses, and only focus on certain types of application functions, and need to cooperate with other devices such as smart phones Use, such as various types of smart bracelets, smart helmets, smart jewelry for physical signs monitoring.

2) A network device, for example, includes a base station (for example, an access point), which may refer to a device in an access network that communicates with a wireless terminal device through one or more cells on an air interface. The network device can be used to convert the received air frame and the Internet Protocol (IP) packet to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network can include an IP network. The network equipment can also coordinate the management of the attributes of the air interface. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional NodeB) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It may also include a next generation node B (gNB) in the 5G NR system, which is not limited in the embodiments of the present application. Network equipment can include macro base stations, micro base stations, indoor hotspots, and relay nodes. The function is to send radio waves to terminal equipment. On the one hand, it implements downlink data transmission. On the other hand, it sends scheduling information to control uplink transmission. Radio waves to receive uplink data transmission.

In addition, in the embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, and the cell may be a network device (For example, a base station) The corresponding cell. The cell can belong to a macro base station or a small cell. The small cell here can include: urban cell, micro cell, and pico cell. (Pico cells), femto cells (Femto cells), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

In addition, the carriers in the LTE system or the NR system can have multiple cells working at the same frequency at the same time. In some special scenarios, the above concepts of carriers and cells can be considered equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a terminal device, it will carry both the carrier index of the secondary carrier and the cell ID (cell ID) of the secondary cell operating on the secondary carrier. In this case, the concept of a carrier and a cell can be considered to be equal, for example, a terminal device accessing a carrier and accessing a cell are equivalent.

3) Subcarrier interval. In an orthogonal frequency division multiplexing (OFDM) system, the interval between the center or peak positions of two adjacent subcarriers in the frequency domain. For example, the subcarrier interval in the LTE system is 15 (kilohertz, kHz), and the subcarrier interval in the NR system may be 15kHz, or 30kHz, or 60kHz, or 120kHz.

Can refer to the following Table 1:

Table 1

Among them, μ is used to indicate the subcarrier interval. For example, when μ = 0, the subcarrier interval is 15kHz, and when μ = 1, the subcarrier interval is 30kHz.

4) Ultra-reliable / low latency (URLLC) services. Compared with 4G communication systems, a major feature of 5G communication systems is the addition of support for ultra-reliable low-latency services. URLLC's business types include many types. Typical use cases include industrial control, industrial production process automation, human-computer interaction, and telemedicine. In order to better quantify the performance indicators of URLLC services and thus provide benchmark input and evaluation criteria for 5G system design, the 3GPP RAN and RAN working groups have defined the performance indicators of URLLC services as follows:

Delay: The transmission time required for a user application layer data packet to reach the receiving end wireless protocol stack layer 2 / 3SDU from the service data unit (SDU) at the transmitting wireless protocol stack layer 2/3. The user plane delay requirement of the URLLC service is 0.5 ms for both uplink and downlink. The above requirements only apply to the base station and the terminal are not in a discontinuous reception state (DRX). It should be pointed out that the performance requirement of 0.5ms here refers to the average delay of the data packet and is not bound to the reliability requirements described below.

Reliability: The success probability of the transmitting end correctly transmitting X-bit data to the receiving end within a certain period of time (L seconds), the above time is still defined as the user application layer data packet arrives at the receiving end wireless from the transmitting end wireless protocol stack layer 2 / 3SDU The time required for the protocol stack layer 2 / 3SDU. For URLLC services, a typical requirement is to send 32 bytes of data within 1ms to achieve 99.999% reliability. It should be pointed out that the above performance indicators are only typical values. Specific URLLC services may have different requirements for reliability. For example, some extremely harsh industrial controls need to achieve 99.9999999% transmission success within an end-to-end delay of 0.25ms. Probability.

System capacity: the maximum cell throughput that the system can achieve under the premise of meeting a certain percentage of interrupted users. Here, the interrupted users refer to users who cannot meet their reliability requirements within a certain delay range.

5) HARQ is an efficient transmission mechanism. On the one hand, the reliability of downlink data transmission can be greatly improved through retransmission. On the other hand, the terminal equipment feeds back HARQ's ACK / NACK. Only when the NACK is fed back, the base station needs to retransmit, which reduces the overall data transmission resources. Consume. In the design of the NR system, in order to support low-latency and high-reliability transmission of URLLC data, HARQ enhancements have been made, which are mainly implemented in two aspects. One is HARQ-less retransmission, that is, there is no need to wait for the terminal device to feedback ACK. / NACK, the base station directly retransmits to reduce the delay of downlink data transmission; on the other hand, it is ACK / NACK feedback enhancement, that is, reducing the time for the terminal device to decode the PDSCH, thereby compressing the loopback delay of HARQ transmission ( round-trip time (RTT). The purpose is to increase the number of HARQ retransmissions within a specified time delay, thereby ensuring low-latency and highly reliable transmission of URLLC data.

6) Bandwidth part (BWP) refers to a part of the channel bandwidth. It can also be called "operating bandwidth" or transmission bandwidth. Mini BWP (BWP), BWP Unit (BWP Unit), and BP The band and the like may be abbreviated as BWP or BP. The names and abbreviations of the bandwidth part are not specifically limited in the embodiments of the present application. BWP can be a continuous resource in the frequency domain. For example, a bandwidth part contains consecutive K (K> 0) subcarriers; or a bandwidth part is frequency domain resources where N (N> 0) non-overlapping consecutive resource blocks (RBs) are located; or A frequency domain resource where a bandwidth part is M (M> 0) non-overlapping continuous resource block groups (resource block group, RBG), and one RBG includes P (P> 0) consecutive RBs. A bandwidth part is related to a specific system parameter (numerology), which includes at least one of a subcarrier interval and a cyclic prefix (CP).

7) High-level signaling may refer to signaling sent by a high-level protocol layer, and the high-level protocol layer is at least one protocol layer above the physical layer. The high-level protocol layer may specifically include at least one of the following protocol layers: a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (packet data convergence) protocol (PDCP) layer, radio resource control (RRC) layer and non-access stratum (NAS).

8) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Multiple" means two or more. In view of this, in the embodiments of the present application, "multiple" can also be understood as "at least two". "And / or" describes the association relationship between related objects and indicates that there can be three types of relationships. For example, A and / or B can indicate that there are three cases in which A exists alone, A and B exist, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the related objects are an "or" relationship.

And, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or Importance.

The embodiments of the present application may be applied to an LTE system or an NR system, and may also be applied to a next-generation mobile communication system or other similar communication systems.

In order to facilitate the explanation of related technologies, the following first briefly introduces the current ACK / NACK feedback method in the NR standard, which mainly involves several aspects such as downlink HARQ-ACK timing, HARQ-ACK codebook determination, and PUCCH resource determination.

The first aspect, HARQ-ACK Timing K1: The current downlink transmission is scheduled through downlink control information (DCI). The corresponding DCI formats include DCI format 1_0 and DCI format 1_1, and DCI format 1_0 is a fallback. Mode, DCI format 1_1 is the normal mode. The DCI format 1_0 and DCI format 1_1 both contain PDSCH-to-HARQ-timing bytes. This byte is generally three bits with a value of "000" to "111", indicating the PDSCH transmission slot and the corresponding ACK / The offset value between NACK transmission time slots. The offset value is recorded as K1. Which of the three bits specifically indicates the value of K1 is configured or predefined by RRC, for example, in normal mode. Next, configure 8 values from 16 values. These 8 values correspond to the three-bit values one by one. These 16 values support at least 0 to 8, or in the fallback mode, 8 predefined values. It is 1 to 8.

After receiving the DCI, the terminal device first obtains the time slot and the symbol information of the PDSCH scheduled by the DCI from the TimeDomainResourceAllocation byte included in the DCI, and then according to the PDSCH-to-HARQ-timing byte Obtain the value of K1, so as to know the time slot information of the ACK / NACK.

In the second aspect, the determination of the HARQ-ACK codebook is specifically divided into two determination methods: a dynamic codebook and a semi-static codebook.

1. Dynamic codebook, also known as type 2 HARQ codebook. The terminal device detects the PDSCH at the monitoring timing of each downlink control channel (physical downlink control channel, PDCCH), and determines the detected PDCCH format 1_0 or PDCCH format according to the TimeDomainResourceAllocation byte and the PDSCH-to-HARQ-timing byte. In what time slot is the PDSCH scheduled for 1_1 transmission, and in which time slot does the corresponding ACK / NACK feedback be determined. At the same time, DCI formats 1_0 and DCI formats 1_1 also include downlink assignment indicator (DAI) information, and the terminal device can learn the ACK / NACK PDCCH that is detected twice and needs to be fed back in the same time slot based on the DAI information. In the meantime, several scheduled ACK / NACK PDCCHs that need to be fed back in the same time slot are missed.

It should be noted that the determination of the codebook in the type 2 HARQ codebook is only based on the DAI information in the DCI, and does not consider the actual PDSCH scheduling information.

2. Semi-static codebook, also known as type HARQ codebook. In this way, the terminal device obtains the possible value set of K1 according to the high-level configuration, and then determines the time slot offset value from PDCCH to PDSCH according to the TimeDomainResourceAllocation table configured at the high-level, records it as K0, and determines the PDSCH time-domain position. Potential value set. Based on the above information, the terminal device can determine the maximum number of ACK / NACKs that need to be fed back in each time slot.

For example, for time slot n, the terminal device can traverse all the values of K1 configured or predefined by the upper layer. Assuming that there are N values of K1, the terminal device can determine the time slot of the PDSCH according to the values of N K1. Collection.

For each potential PDSCH time slot in turn (the value of K1 can be arranged from large to small), that is, for each time slot in the set of time slots where the determined PDSCH is located, the terminal device can traverse M types of high-level configurations The value of TimeDomainResourceAllocation, each value of TimeDomainResourceAllocation corresponds to a slot offset value K0 and the PDSCH time domain location. For a value of TimeDomainResourceAllocation, if the time slot where the PDCCH is calculated according to K0 can be scheduled for the PDCCH (that is, according to the PDCCH detection period and offset configured by the higher layer, it can be determined that the time slot where the PDCCH belongs is a PDCCH detection time slot, and The downlink (DL) -uplink (UL) ratio of the time slot can ensure downlink transmission, and the corresponding PDSCH time domain position can be used for downlink transmission (that is, any time domain symbol of the PDSCH is not configured. Is the uplink symbol), then the PDSCH is considered as a candidate PDSCH occasion.

In a time slot, if different candidate PDSCH timings overlap in the time domain, the terminal device only counts once, that is, for these overlapping candidate PDSCH timings, the terminal device only needs to feedback an ACK / NACK . Specifically, the terminal device may determine which candidate PDSCH occasions to feed back only one ACK / NACK by segmenting the candidate PDSCH occasions in the time slot. Refer to Figure 2. A time slot is shown. Assuming TimeDomainResourceAllocation has M = 16 values, which correspond to # 0 ～ # 15 in Figure 2, and the PDCCH corresponding to these PDSCH timings can be transmitted. The timing of these PDSCH timings The domain location can also perform downlink transmission, and the candidate PDSCH timing includes # 0 to # 15 in FIG. 2. # 0 indicates the timing of the first PDSCH candidate, and so on. The 16 candidate PDSCH timings are segmented, and the segmentation positions are shown by the vertical dotted lines in FIG. 2. After segmentation, four candidate PDSCH groups are obtained. It can be seen that the candidate PDSCH timings included in the four candidate PDSCH groups are {# 0, # 1, # 2, # 3, # 4, # 6. , # 12}, {# 7, # 9, # 13}, {# 5, # 8, # 10, # 14}, {# 11, # 15}. For each of the four candidate PDSCH timing units, each candidate PDSCH timing unit includes multiple candidate PDSCH timings, but the candidate PDSCH timings included in a candidate PDSCH timing unit overlap in the time domain, so The terminal device will only send at most one ACK / NACK for each candidate PDSCH, and will not send ACK / NACK for each candidate PDSCH timing. Taking Figure 2 as an example, for example, the value set of K1 includes 8 values, that is, there are 8 PDSCH transmission slots that need to feed back ACK / NACK in slot n, and the terminal device needs to send a total of 4 × 8 = 32 ACK / NACK, these 32 ACK / NACKs are also codebooks to be transmitted, or are called ACK / NACK codebooks.

It should be noted that the determination of the codebook in the type 1 HARQ codebook has little relationship with the DAI information in the DCI. To be precise, the DCI in the DCI has only 1 bit. When the value of the 1 bit is 0, it means that it is determined according to the above steps. For a semi-static codebook, when the value of 1 bit is 1, a decision to perform a rollback process is performed in combination with other conditions.

In general, the determination of the codebook in the type 1 HARQ codebook depends on the K1 value set (K1Set), the TimeDomainResourceAllocation value set, and the DL-UL ratio.

The third aspect is to determine the PUCCH resource of the transmission codebook. After determining the HARQ-ACK codebook in one time slot, the terminal device first determines the number of ACK / NCK bits that need to be fed back, that is, the payload size, and then selects a PUCCH resource set according to the payload size. ). Among them, each PUCCH resource set includes a minimum of 8 and a maximum of 32 PUCCH resources, and the terminal device is further based on the received ACK / NACK resource indicator (ACK / NCK resource indicator, ARI) in the PDCCH and the implicit indication method. Determine which PUCCH resource is selected from the PUCCH resource set to send the ACK / NACK codebook, where this PDCCH refers to the last ACK / NACK feedback corresponding to the PDSCH scheduled in the PDCCH successfully detected by the terminal device within the same time unit PDCCH.

For example, K (1≤K≤4) PUCCH Resource Sets can be configured in the NR system, where the PUCCH Resource Set k (k = 0,1,2,3) can carry the ACK / NCK payload size, denoted as N _UCI , N _UCI ranges _{_{_{N k ≤N UCI <N k +}}} 1, the current system specifies _{_{NR, N 0 = 1, N 1}} = 3.

The ARI is generally 3 bits. When the number of PUCCH resources in a PUCCH resource set is greater than 8, the PUCCH resources in the PUCCH resource set are divided into 8 subsets. The ARI can indicate which subset is selected and then use the PDCCH. Control element (CCE) index of the starting control channel to implicitly indicate which PUCCH resource in the subset is selected.

After selecting the PUCCH resource, the terminal device can send an ACK / NACK codebook through the PUCCH resource.

However, at present, the 3GPP has determined in the NR standard that the ACK / NACK that is fed back within one slot needs to be jointly encoded into a HARQ-ACK codebook, and 1 PUCCH resource is used for feedback. As shown in Figure 1, the subcarrier interval used for downlink transmission is 30kHz, and the subcarrier interval used for uplink transmission is 15kHz. Limited by the data decoding capability of the terminal device, the fastest ACK / NACK of PDSCH1 can be fed back at the start symbol of the second uplink time slot in Figure 1, but the fastest scheduled ACK / NACK of PDSCH2 is only Feedback can be made at the end of the second uplink time slot. In this way, since the ACK / NACK in one slot needs joint coding feedback, the ACK / NACK of PDSCH1 will be delayed for transmission. As shown in Figure 1, if the ACK / NACK of PDSCH1 can be timely feedback, the PDSCH1 retransmission It should occur at the position shown by "×", but because the ACK / NACK of PDSCH1 is delayed, the retransmission of PDSCH1 can only occur at the position shown by "√". If the ACK / NACK of PDSCH1 is NACK, then The base station's retransmission of PDSCH1 will also be delayed accordingly. It can be seen that the current ACK / NACK feedback method has a great impact on the transmission delay of downlink data.

In addition, in the current discussion of NR, some companies have proposed to distinguish between ACK / NACK for URLLC services and ACK / NACK for enhanced mobile broadband (eMBB) services. Based on service differentiation, if URLLC's ACK / NCK and eMBB's ACK / NCK is transmitted in one time slot, and can be optimized. Typical optimization processing includes:

Send only the ACK / NCK of the URLLC service, and delay the ACK / NCK of the eMBB service to the next time slot for sending; or,

Send only ACK / NCK for URLLC services, not ACK / NCK for eMBB services; or,

Compress / encode the ACK / NCK of the eMBB service, such as performing an exclusive OR operation, and transmitting the compressed ACK / NCK bit of the URLLC service in the compressed bit field; or,

Encode the ACK / NCK bits of the URLLC service and the ACK / NCK bits of the eMBB service, add different redundancy or duplication, and then transmit them in series. The method of joint coded transmission.

However, the above technology is mainly used to solve the problem of ACK / NCK transmission reliability of URLLC services, and has a small effect on reducing the delay of ACK / NCK transmission of URLLC services. For example, when two PDSCHs arrive consecutively for URLLC services, the corresponding The ACK / NCK needs feedback of the start position and the end position within one time slot, respectively. The above method still cannot guarantee that the ACK / NCK of the first PDSCH can get timely feedback.

In view of this, the technical solution provided in the embodiment of the present application can effectively reduce the transmission delay of the feedback information, thereby reducing the transmission delay of the downlink data accordingly.

Please refer to FIG. 3, which is an application scenario according to an embodiment of the present application. FIG. 3 includes a network device and a plurality of terminal devices. The network device is, for example, a base station. There may be various types of terminal devices. For example, the terminal device 1 is a television, the terminal device 5 is a mobile phone, and the terminal device 6 is a smart printer. Wait.

The following describes the method for sending and receiving codebook information provided in the embodiments of the present application. In the following introduction process, the method is applied to the application scenario shown in FIG. 3 as an example. Then, the network device described below can be implemented through The network device in FIG. 3 or a chip provided in the network device is implemented. The terminal device described below may be implemented by a terminal device shown in FIG. 3 or a chip provided in the terminal device. See Figure 4 for a flowchart of the method.

S41. The network device sends high-level signaling to the terminal device, and the terminal device receives the high-level signaling from the network device.

The high-level signaling is, for example, RRC signaling, and various types of information can be configured through high-level signaling. For example, the information configured through high-level signaling may include one or more of the following:

Configuration 1: DL's subcarrier spacing (SCS) and UL's subcarrier spacing.

Configuration 2: Information of the PUCCH resource set used to carry ACK / NCK.

Configuration 3: ACK / NACK feedback granularity. For example, if you configure transport block (TB) as granular ACK / NCK feedback, it means that you do not need to perform codeword group (CBG) granular ACK / NCK feedback. ACK / NCK feedback with TB granularity is required. For example, through configuration 3, the number of TBs transmitted by one PDSCH is also configured. For example, the number is 1, that is, one PDSCH only carries one TB.

Configuration 4: K1 value set.

Configuration 5: According to the length of the TimeDomainResourceAllocation in the PDCCH, a parameter group is configured for each value of TimeDomainResourceAllocation, and a value of TimeDomainResourceAllocation corresponds to a candidate reception timing. The candidate reception timing will be described later. For example, the parameter group configured for each of these values includes one or more parameters in parameter group A. Parameter group A includes {TimeDomainResourceAllocation, K0, SLIV, PDSCH Mapping type, ACK / NCK Codebook ID }. For different values of TimeDomainResourceAllocation, the values of some or all parameters in this parameter group will be different. Among them, K0 represents PDCCH-to-PDSCH-timing, that is, the time slot offset value between PDCCH and PDSCH, which can also be called the timing offset value between PDSCH and PDCCH, which refers to the time unit of a PDSCH. The difference between the number and the time unit number where the PDCCH scheduling the PDSCH is located. The start-length indicator value (SLIV) indicates the time domain position of the PDSCH, including the start symbol and the continuous length of the PDSCH. PDSCH Mapping Type indicates whether the mapping type of the PDSCH is Type A or Type B, which is used to indicate The location of the demodulation reference signal (DMRS) in the PDSCH. The HARQ-ACK CodebookID represents the codebook identification information of the HARQ-ACK codebook to which the ACK / NCK corresponding to the PDSCH belongs.

Regarding configuration 5, for example, a network device may configure a PDSCH time domain resource allocation configuration table through high-level signaling. The table may include 2 ^N rows, where N is the number of bits included in the TimeDomainResourceAllocation byte in the PDCCH configured through high-level signaling. Each row of the table can be regarded as one item, and the table can include 2 ^N items, each of which corresponds to a value of TimeDomainResourceAllocation, and a value of TimeDomainResourceAllocation also corresponds to a candidate receiving opportunity. Therefore, the table configuration The values of the parameters in the parameter group corresponding to the 2 ^N candidate receiving timings are respectively shown. The table may include at least one of the following parameters: the value of TimeDomainResourceAllocation, the mapping type of K0, SLIV, PDSCH, and codebook identification information. For example, the table includes at least the value of TimeDomainResourceAllocation, and other parameters may or may not be included, or the table includes at least SLIV, and other parameters may or may not be included.

For example, the parameter corresponding to the first column of the table is TimeDomainResourceAllocation, and the first column is the values of TimeDomainResourceAllocation, and these values are 0, 1, ..., 2 ^N -1. Of course, the value of the TimeDomainResourceAllocation byte can be regarded as a parameter or an index. The corresponding parameter in the second column of the table is K0, and the second column is the value of K0, which is the value of PDCCH-to-PDSCH-Timing, which indicates the time unit (such as time slot) where a PDSCH is located and the The offset value of the number between the time units where the PDCCH of the PDSCH is located. The corresponding parameter in the third column of the table is SLIV. The third column is the value of SLIV. The value of one SLIV corresponds to a unique start symbol + time domain length configuration. The corresponding parameter in the fourth column of the table is the PDSCH mapping type, that is, the PDSCH mapping type. The PDSCH mapping types include Type A and Type B. It is the time domain mapping position of the PDSCH in the PDSCH or the time unit where the PDSCH is located. . The corresponding parameter in the fifth column of the table is the codebook identification information. Of course, the correspondence between the columns of the table and the parameters is only an example, and the embodiment of the present application is not limited thereto. And, the table may also include other parameters, which are not listed here. By means of a table, a parameter group corresponding to a candidate receiving opportunity can be configured to the terminal device intuitively.

Configuration 7: the number and number of carriers (component carriers) used for downlink transmission, and the number of carriers used for uplink ACK / NCK feedback.

Among them, regarding the above configuration information, the network device may configure the terminal device through one high-level signaling, or may configure the terminal device through multiple high-level signaling.

Among them, S41 is an optional step, that is, it is not necessarily performed.

S42. The network device sends at least one physical downlink data channel in the candidate receiving opportunity in the first time unit set, and the terminal device receives at least one physical downlink data channel from the network device in the candidate receiving opportunity in the first time unit set. .

The time unit is, for example, a time slot, a subframe, a transmission time interval (TTI), a short transmission time interval (sTTI), etc. This article mainly uses time slots as an example.

As mentioned above, the network device can configure some information for the terminal device, taking the time unit as an example. For time slot n, for example, the network device will configure the K1 value set for the terminal device, such as the value of K1. The set includes P values, then P time units can be determined based on the P values. The P time units are the time units where the PDSCH is located, and each time unit may include one or more candidate receptions. Timing, for example, P time units include a total of M candidate receiving occasions, and the ACK / NACK corresponding to the M candidate receiving occasions are all to be transmitted in slot n. Then, the P time units constitute a first time unit set, and the first time unit set includes M candidate receiving opportunities. The candidate reception timing refers to the reception timing of the candidate PDSCH, that is, the candidate PDSCH occasion, which can be understood as the time domain position of the candidate PDSCH. Candidate PDSCH Occasion is a possible PDSCH Occasion configured by higher layers. One candidate receiving timing can receive one PDSCH, so it can be considered that the candidate receiving timing corresponds to the PDSCH one-to-one.

The M candidate receiving timings are divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information, where the codebook identification information includes the first codebook identification information and the second codebook identification information, The first candidate receiving opportunity subset corresponds to the first codebook identification information, and the second candidate receiving opportunity subset corresponds to the second codebook identification information. It can be understood that the codebook identification information is set for the candidate reception timing, then the candidate reception timing set with the first codebook identification information belongs to the subset of the first candidate reception timing, and the candidate reception of the second codebook identification information is set The timing belongs to the second candidate receiving timing subset. Therefore, by setting the codebook identification information, the candidate receiving timing can be divided into different candidate receiving timing subsets. Here is an example of dividing the M candidate receiving timings into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information. In fact, the embodiment of the present application does not limit the obtained candidate receiving timings. The number of sets may also be divided into a subset of candidate reception timings, or may be divided into 3 or more subsets of candidate reception timings. Wherein, each of the candidate receiving opportunity subsets obtained by the division may include at least one candidate receiving opportunity.

According to the codebook identification information, the candidate receiving opportunities can be divided into different candidate receiving opportunity subsets, and the feedback information corresponding to the candidate receiving opportunities included in the different candidate receiving opportunity subsets is correspondingly divided into different groups, for example, The feedback information corresponding to the candidate reception timing included in the first candidate reception timing subset is divided into a first group, the first group corresponds to the first codebook, and the feedback corresponding to the candidate reception timing included in the second candidate reception timing subset includes The information is divided into a first group, and the second group corresponds to a second codebook. The codebook may also be referred to as an ACK / NACK codebook. Therefore, the codebook identification information may indicate to which codebook the ACK / NCK corresponding to a candidate receiving timing is assigned. The codebook identification information may be set by a network device for a candidate receiving timing. One example is that the value of the codebook identification information includes 0 and 1. If the value is 0, it means that the ACK / NCK corresponding to the candidate receiving opportunity for which the codebook identification information is set will be assigned to the first codebook. If the value is 1, it indicates that the ACK / NCK corresponding to the candidate receiving timing for which the codebook identification information is set will be assigned to the second codebook. Of course, the manner of indicating the codebook identification information is not limited to this.

In the embodiment of the present application, the network device may send at least one physical downlink data channel at a candidate receiving opportunity in a first time unit set in a downlink frequency unit, and the terminal device is the first in the downlink frequency unit. Receive at least one scheduled physical downlink data channel from a network device at a candidate receiving opportunity in a set of time units.

The downlink frequency unit involved in this document is, for example, a carrier element (CC) or a bandwidth part (BWP). Of course, when the embodiment of the present application describes the provided solution, only one downlink frequency unit is taken as an example. In fact, the method in the embodiment of the present application can also be extended to a scenario of multiple downlink frequency units, such as a scenario of multiple carriers or multiple BWPs. The method provided in the embodiment of the present application may also be applied.

As a first example, each of the M candidate receiving opportunities corresponds to a first parameter group, and the first parameter group includes codebook identification information and includes at least one of the following information: physical downlink data channel and physical The timing offset between the downlink control channels, the time domain location information of the physical downlink data channel, and the physical downlink data channel mapping type. The physical downlink data channel is, for example, PDSCH, and the physical downlink control channel is, for example, PDCCH. That is, the first parameter group includes codebook identification information, and further includes at least one of K0, SLIV, and PDSCH mapping types. For example, the first parameter group may include codebook identification information, and also include three types of K0, SLIV, and PDSCH mapping types, then the first parameter group includes codebook identification information, K0, SLIV, and PDSCH mapping types, or the first parameter The group may include codebook identification information, and also include two of K0, SLIV, and PDSCH mapping types. For example, the first parameter group includes codebook identification information, K0, and SLIV, or the first parameter group may include codebook identification information. And also includes one of K0, SLIV, and PDSCH mapping types. For example, the first parameter group includes codebook identification information and SLIV. In the first example, the PDSCH time domain resource allocation configuration table configured by the network device for the terminal device in S41 may include the parameters in the first parameter group. It can be seen that this example explicitly includes the codebook identification information in the parameter group corresponding to the candidate reception timing, so that the terminal device can clearly determine the correspondence between the codebook identification information and the candidate reception timing.

An implementation method of the first example is that the PDSCH time domain resource allocation configuration table introduced above may include at least two parameters, and one of the at least two parameters is codebook identification information. For example, in the first example, the PDSCH time domain resource allocation configuration table introduced above may include five columns. For the introduction of these five columns, refer to the foregoing. If TimeDomainResourceAllocation is regarded as a parameter, the first parameter group may include {TimeDomainResourceAllocation, K0, SLIV, PDSCH mapping type, codebook identification information}. If TimeDomainResourceAllocation is regarded as only an index, the first parameter group may include {K0, SLIV, PDSCH mapping type, codebook identification information}, then the value of a TimeDomainResourceAllocation byte corresponds to the first value of the first parameter group {K0, SLIV, PDSCH mapping, type, codebook identification information}, The value of the codebook identification information may be 0 or 1. If 0 is taken, it indicates that the candidate receiving opportunity corresponding to the codebook identifying information belongs to the first candidate receiving opportunity subset, and also indicates that the candidate receiving opportunity corresponds to an ACK / NACK belongs to the first codebook. If it is set to 1, it indicates that the candidate receiving opportunity corresponding to the codebook identification information belongs to the second candidate receiving opportunity subset. It also indicates that the ACK / NACK corresponding to the candidate receiving opportunity belongs to the second codebook. Of course The correspondence between the value of the codebook identification information and the codebook is not limited to this.

As a second example, each of the M candidate receiving occasions corresponds to a second parameter group, and the second parameter group includes a physical downlink data channel mapping type and includes at least one of the following information: a physical downlink data channel The timing offset from the physical downlink control channel and the time domain location information of the physical downlink data channel. The codebook identification information corresponds to the physical downlink data channel mapping type. The physical downlink data channel is, for example, PDSCH, and the physical downlink control channel is, for example, PDCCH. That is, the second parameter group includes a PDSCH mapping type and also includes at least one of K0 and SLIV. For example, the second parameter group may include PDSCH mapping types, and also include K0 and SLIV. Then, the second parameter group includes PDSCH mapping types, K0, and SLIV, or the second parameter group may include PDSCH mapping types and K0. And SLIV, for example, the second parameter group includes a PDSCH mapping type and SLIV. In this example, the PDSCH time domain resource allocation configuration table configured by the network device for the terminal device in S41 may include the parameters in the second parameter group. It can be seen that this example does not explicitly include the codebook identification information in the parameter group corresponding to the candidate receiving timing, but establishes a corresponding relationship with some or all parameters in the parameter group, which can reduce the parameters included in the parameter group. quantity. In the second example, the codebook identification information is mapped to the physical downlink data channel mapping type. Then, the network device may determine the codebook identification information according to the physical downlink data channel mapping type. For example, if the physical downlink data channel mapping type is the same The candidate reception timing is divided into a subset of candidate reception timing.

An implementation method of the second example is that the PDSCH time domain resource allocation configuration table introduced above may include at least two parameters, and one of the at least two parameters is a PDSCH mapping type. For example, in the second example, the PDSCH time domain resource allocation configuration table introduced above may include four columns, that is, the fifth column corresponding to the codebook identification information described above is not included. The introduction of these four columns can refer to the previous article. If TimeDomainResourceAllocation is regarded as a parameter, the second parameter group may include {TimeDomainResourceAllocation, K0, SLIV, PDSCH mapping type}, and if TimeDomainResourceAllocation is regarded as only an index, the first parameter group may include {K0, SLIV, PDSCH mapping type}, then the value of one TimeDomainResourceAllocation byte corresponds to the first value of the second parameter group {K0, SLIV, PDSCH mapping type}. In the second example, the correspondence between the PDSCH mapping type and the codebook identification information can also be configured in a high-level signaling or protocol pre-defined manner. For example, if PDSCH mapping type = TypeA, the The codebook identification information is 0, which indicates that the candidate receiving opportunity belongs to a subset of the first candidate receiving opportunity, and also indicates that the ACK / NCK corresponding to the candidate receiving opportunity belongs to the first codebook. If PDSCH mapping = TypeB, the candidate receiving opportunity The codebook identification information is 1 and the candidate reception timing belongs to the second subset of candidate reception timings, which also indicates that the ACK / NCK corresponding to the candidate reception timing belongs to the second codebook.

As a third example, each of the M candidate receiving opportunities corresponds to a third parameter group, and the third parameter group includes time domain location information of a physical downlink data channel, and may further include at least one of the following information: The timing offset between the physical downlink data channel and the physical downlink control channel, and the physical downlink data channel mapping type. The codebook identification information corresponds to the time-domain location information of the physical downlink data channel. The physical downlink data channel is, for example, PDSCH, and the physical downlink control channel is, for example, PDCCH. That is, the third parameter group includes SLIV and also includes at least one of K0 and PDSCH mapping types. For example, the third parameter group may include SLIV, and also include two types of K0 and PDSCH mapping, then the third parameter group includes PDSCH mapping type, K0, and SLIV, or the third parameter group may include SLIV, including K0 and PDSCH One of the mapping types, for example, the third parameter group includes K0 and SLIV. In this example, the PDSCH time domain resource allocation configuration table configured by the network device for the terminal device in S41 may include the parameters in the third parameter group. It can be seen that this example does not explicitly include the codebook identification information in the parameter group corresponding to the candidate receiving timing, but establishes a corresponding relationship with some or all parameters in the parameter group, which can reduce the number of parameters included in the parameter group. The number of parameters.

In the third example, the codebook identification information corresponds to the time-domain location information of the physical downlink data channel, and may include at least one of the following two correspondences: 1. The codebook identification information and the start of the physical downlink data channel The symbol numbers correspond; 2. The codebook identification information corresponds to the time domain length of the physical downlink data channel. In a third example, the codebook identification information may be corresponding to the number of the starting symbol of the physical downlink data channel, and then the network device may determine the codebook identification information according to the number of the starting symbol of the physical downlink data channel. For example, The candidate reception timings with the same or similar starting symbol numbers of the physical downlink data channel are divided into a subset of candidate reception timings. For example, the candidate reception timings with the starting symbols of the physical downlink data channel in the first half of the time slot are divided into first. A subset of candidate reception timings, and the candidate reception timing of the physical downlink data channel starting symbol in the second half of the time slot is divided into a second subset of candidate reception timings, so the first codebook corresponding to the first candidate reception timing subset is also You can get more timely delivery. Alternatively, in the third example, the codebook identification information may be corresponding to the time domain length of the physical downlink data channel, and then the network device may determine the codebook identification information according to the time domain length of the physical downlink data channel. For example, Candidate reception opportunities with time-domain lengths of the downlink data channel greater than the preset length threshold are divided into a first candidate receiving subset, and candidate reception opportunities with time-domain lengths of the physical downlink data channel less than or equal to the preset length threshold are divided into the second Candidate receiving subset. Generally speaking, if the physical downlink data channel has a short time domain length, it may indicate that it is more important data or more urgent data. Through this division, the code corresponding to the more important or urgent data can be made. This book is sent separately to improve transmission reliability. The number of the symbol can be understood as the index of the symbol. The "symbols" herein are, for example, orthogonal frequency division multiplexing (OFDM) symbols.

If the codebook identification information corresponds to the number of the starting symbol of the physical downlink data channel, then one implementation method is that in the PDSCH time domain resource allocation configuration table introduced above, four columns can be included, that is, not included The fifth column corresponding to the codebook identification information introduced in the foregoing section can be referred to the previous section for the introduction of these four columns. The parameter X is configured in a high-level signaling or protocol pre-defined manner, and the correspondence between the number of the start symbol of the PDSCH and the codebook identification information is predefined in the high-level signaling or protocol. For example, if the PDSCH start The number of the symbol is less than or equal to X, then the codebook identification information of the candidate receiving opportunity is 0, indicating that the candidate receiving opportunity belongs to the first subset of candidate receiving opportunities, and also indicates that the ACK / NCK corresponding to the candidate receiving opportunity belongs to the first code. In this case, if the number of the PDSCH start symbol is greater than X, the codebook identification information of the candidate receiving opportunity is 1, which indicates that the candidate receiving opportunity belongs to a second subset of candidate receiving opportunities, and also indicates the ACK / NCK corresponding to the candidate receiving opportunity. Belongs to the second codebook. Of course, the correspondence between the number of the PDSCH start symbol and the codebook identification information is not limited to this. When the number of the PDSCH start symbol is equal to X, does it mean that the corresponding codebook identification information is 0 or 1, this application The examples are not limited.

Or, if the codebook identification information corresponds to the time domain length of the physical downlink data channel, one implementation method is to include four columns in the PDSCH time domain resource allocation configuration table introduced above, that is, not including The fifth column corresponding to the codebook identification information introduced in the foregoing section can be referred to the previous section for the introduction of these four columns. The parameter Y is configured in a high-level signaling or protocol pre-defined manner, and the correspondence between the time domain length of the PDSCH and the codebook identification information is pre-defined in high-level signaling or protocol. For example, if the time domain length of the PDSCH is less than Or equal to Y, the codebook identification information of the candidate receiving opportunity is 0, which indicates that the candidate receiving opportunity belongs to a subset of the first candidate receiving opportunity, and also indicates that the ACK / NCK corresponding to the candidate receiving opportunity belongs to the first codebook. The starting time domain length is greater than Y, and the codebook identification information of the candidate receiving opportunity is 1, which indicates that the candidate receiving opportunity belongs to the second candidate receiving opportunity subset, and also indicates that the ACK / NCK corresponding to the candidate receiving opportunity belongs to the second codebook. Of course, the correspondence between the time domain length of the PDSCH and the codebook identification information is not limited to this. When the time domain length of the PDSCH is equal to Y, whether the corresponding codebook identification information is 0 or 1 is not used in this embodiment of the present application. limit.

S43. The terminal device generates a feedback information codebook according to the receiving status of at least one physical downlink data channel. The feedback information codebook includes a first codebook and a second codebook. The first codebook corresponds to a first subset of candidate reception opportunities. The second codebook corresponds to a second subset of candidate timings.

As mentioned earlier, the M candidate receiving opportunities are divided into a first candidate receiving opportunity subset and a second candidate receiving opportunity subset. Each of the candidate receiving opportunity subsets may include at least one candidate receiving opportunity, then one candidate The ACK / NACK corresponding to the candidate reception opportunities included in the subset of reception timings can be regarded as a group, and the ACK / NACK corresponding to the candidate reception opportunities included in the first candidate reception timing subset can be regarded as the first group, and the second The ACK / NACK corresponding to the candidate reception timing included in the candidate reception timing subset can be regarded as the second group, then, the first group of ACK / NACK constitutes the first codebook, and the second group of ACK / NACK constitutes the second codebook.

Among them, for the first candidate receiving opportunity subset and the second candidate receiving opportunity subset, to determine the corresponding codebook, a splitting method may be adopted. For the splitting method, refer to the foregoing description of the semi-static codebook method. An introduction to time slot segmentation. After segmentation, a time slot can be segmented into at least one group, where each group actually includes at least one candidate reception opportunity, but a group of candidate reception opportunities corresponds to only one ACK / NACK, thereby determining the need The number of feedback ACK / NACKs, and the value set of K1 indicates how many PDSCH slots are in total, so that the number of ACK / NACKs corresponding to the first candidate reception timing subset and the second candidate can be determined respectively. The number of ACK / NACKs corresponding to the subset of reception timings. The terminal device can then generate the first codebook and the second codebook according to the actual reception situation of the PDSCH.

S44. The terminal device sends the first codebook and / or the second codebook in the second time unit. If the terminal device sends the first codebook in the second time unit, the network device receives the first codebook from the terminal in the second time unit. The first codebook of the device. If the terminal device sends the second codebook in the second time unit, the network device receives the second codebook from the terminal device in the second time unit, and the second time unit is integrated with the first time unit. There is a first association relationship. In FIG. 4, the terminal device sends the first codebook and the second codebook in the second time unit, and the network device receives the first codebook and the second codebook in the second time unit as an example.

As mentioned above, the network device can configure some information for the terminal device, taking the time unit as an example. For time slot n, for example, the network device will configure the K1 value set for the terminal device, such as the value of K1. The set includes P values, then P time units can be determined according to the P values. These P time units constitute the first time unit set, and the time slot n is used to send the P time units. The time unit of the ACK / NACK corresponding to the PDSCH transmitted in the middle, that is, the second time unit. Therefore, it is considered that there is an association relationship between the second time unit and the first time unit set. This association relationship is referred to as the first association relationship. The first association relationship is determined by a high-level configuration or a predefined value set of K1. The first association relationship may be considered as a semi-static correspondence relationship between the first time unit set and the second time unit configured or predefined by high-level signaling.

For the semi-static correspondence, it can be understood that: the higher-level signaling configuration or pre-defined timing offset value between PDSCH and the corresponding ACK / NCK, that is, the possible value set of PDSCH-to-HARQ-Timing, that is, the value of K1 Value set, the difference between the number of the second time unit and the number of any time unit included in the first time unit set should belong to the K1 value set.

In addition to the first association relationship, this article also relates to the second association relationship. The second association relationship refers to the correspondence relationship between the physical downlink data channel and the second time unit, which is different from the first association relationship that is semi-static. The second association relationship is a dynamic correspondence relationship, that is, the second association relationship refers to a dynamic correspondence relationship between a physical downlink data channel and a second time unit. There is also a corresponding relationship between the physical downlink data channel and a subset of candidate reception timings. Therefore, the second association relationship can also be regarded as the association relationship between the subset of candidate reception timings and the second time unit, for example, the first candidate A second association relationship may exist between the subset of receiving timings and the second time unit, and a second association relationship may also exist between the second subset of receiving timings and the second time unit.

For the first subset of candidate reception timings, the second association relationship can be understood as: For the first subset of candidate reception timings, at least one of the first candidate reception timings satisfies the PDCCH scheduling the first candidate reception timings. The terminal device successfully detects, and the timing offset value (that is, the value of K1) between the PDSCH indicated by the PDSCH-to-HARQ-Timing byte in the first subsequent reception timing and the corresponding ACK / NCK is equal to the second time unit The difference between the number of the first candidate receiving opportunity and the number of the time unit where the first candidate receiving opportunity is located, then there is a second association between the first candidate receiving opportunity subset and the second time unit. Or it is understood that if the terminal device receives the third physical downlink control channel, the third physical downlink data channel scheduled by the third physical downlink control channel belongs to the first subset of candidate timings, and the third physical downlink control channel indicates the third physical downlink control channel. The feedback information corresponding to the physical downlink data channel is sent in the second time unit, it is considered that there is a second association relationship between the first candidate receiving timing subset and the second time unit. Correspondingly, if the terminal device does not receive the scheduled physical downlink data channel belonging to the first candidate reception timing subset, and the feedback information corresponding to the indicated scheduled physical downlink data channel is sent in the second time unit Physical downlink control channel, then there is no second association between the first candidate reception timing subset and the second time unit.

For example, a second association between the first candidate receiving opportunity subset and the second time unit means that the terminal device detects that a PDCCH # m schedules the PDSCH # n, and the PDSCH # n belongs to the first candidate receiving opportunity subset. And the ACK / NCK of PDSCH # n indicated by the PDSCH-to-HARQ-Timing byte in PDCCH # m is fed back on the second time unit.

The same is true for the second candidate receiving opportunity subset. The second association relationship can be understood as: For the second candidate receiving opportunity subset, at least one of the second candidate receiving opportunities satisfies the PDCCH scheduling the second candidate receiving opportunity. The terminal device successfully detected the timing offset between the PDSCH indicated by the PDSCH-to-HARQ-Timing byte in the second candidate reception timing and the corresponding ACK / NCK (that is, the value of K1) is equal to the second time The difference between the number of the unit and the number of the time unit in which the second candidate receiving opportunity is located, then there is a second correlation between the second candidate receiving opportunity subset and the second time unit. Or it is understood that if the terminal device receives the fourth physical downlink control channel, the physical downlink data channels scheduled by the fourth physical downlink control channel belong to the second subset of candidate timings, and the fourth physical downlink control channel indicates the fourth physical downlink. The feedback information corresponding to the data channel is sent in the second time unit, it is considered that there is a second association relationship between the second candidate receiving opportunity subset and the second time unit. Correspondingly, if the terminal device does not receive the scheduled physical downlink data channel belonging to the second candidate receiving opportunity subset and the feedback information corresponding to the indicated scheduled physical downlink data channel is sent in the second time unit Physical downlink control channel, the second candidate receiving timing subset does not have a second association relationship with the second time unit.

For example, a second association between the second candidate receiving opportunity subset and the second time unit means that the terminal device detects that a PDCCH # f schedules the PDSCH # h, and the PDSCH # h belongs to the second candidate receiving opportunity subset. And the ACK / NCK of PDSCH # h indicated by the PDSCH-to-HARQ-Timing byte in PDCCH # f is fed back on the second time unit.

If the value set of K1 is configured according to high-level signaling, then the ACK / NACK corresponding to the candidate receiving opportunities included in the first candidate receiving opportunity subset constitutes the first codebook, and the first codebook is to be transmitted in the second time unit. The first candidate receiving opportunity subset is related to the second time unit. Similarly, according to the value set of K1 configured by high-level signaling, the ACK corresponding to the candidate receiving opportunities included in the second candidate receiving opportunity subset. / NACK constitutes the second codebook, and the second codebook is to be transmitted in the second time unit. Therefore, there is also an association relationship between the second candidate receiving opportunity subset and the second time unit, and this association relationship is semi-static The corresponding relationship is not a dynamic second association relationship. In other words, in addition to the configuration of high-level signaling, this article also needs to consider the actual situation, that is, the dynamic situation. For example, for a candidate receiving opportunity in the first candidate receiving opportunity subset, although according to the configuration of high-level signaling, the ACK / NACK corresponding to the candidate receiving opportunity needs to be sent in the second time unit, but it is The indication of the PDCCH of the candidate receiving opportunity. The ACK / NACK corresponding to the candidate receiving opportunity is not sent in the second time unit, but is sent in other time units. Then there is no longer an association between the candidate receiving opportunity and the second time unit. Relationship, then this article considers that there is no dynamic association relationship between the candidate receiving opportunity and the second time unit, that is, there is no second association relationship. Therefore, if all candidate reception timings included in a candidate reception timing subset do not have a second association with the second time unit, it is considered that the candidate reception timing subset does not have a second association with the second time unit, and If, among all candidate reception opportunities included in a candidate reception opportunity subset, as long as there is a second association between a candidate reception opportunity and a second time unit, the candidate reception opportunity subset and the second time unit may be considered to have a second connection relation.

Then in this article, if the second candidate receiving opportunity subset has a second association with the second time unit, and the second candidate receiving opportunity subset does not have the second association with the second time unit, the terminal device is at the first The first codebook is sent in two time units, and the second codebook is not sent in the second time unit. The network device receives the first codebook in the second time unit, but does not receive the second codebook in the second time unit. Wherein, the terminal device does not send the codebook, and it can also be described as the terminal device muting the codebook. For example, the terminal device does not send the second codebook, which can be described as the terminal device muting the second codebook. Of course, the terminal device sends the encoded first codebook, and the network device receives the encoded first codebook. The terminal device independently encodes the first codebook.

Or, if the second candidate receiving opportunity subset does not have a second association relationship with the second time unit, and the second candidate receiving opportunity subset has a second association relationship with the second time unit, the terminal device at the second time The unit sends the second codebook without sending the first codebook at the second time unit, and the network device receives the second codebook at the second time unit instead of the first codebook at the second time unit. Of course, the terminal device sends the encoded second codebook, and the network device receives the encoded second codebook. The terminal device independently encodes the second codebook.

Or, if the second candidate receiving opportunity subset has a second association with the second time unit, and the second candidate receiving opportunity subset has a second association with the second time unit, the terminal device sends the first For a codebook and / or a second codebook, the network device receives the codebook sent by the terminal device in the second time unit, which may be the first codebook and / or the second codebook. Wherein, the terminal device sends the independently encoded first codebook and / or the independently encoded second codebook, and the network device receives the independently encoded first codebook and / or the independently encoded second codebook. This means that the terminal device encodes the first codebook and the second codebook independently. Alternatively, the terminal device may also send the first and second codebooks after joint coding, and then the network device also receives the first and second codebooks after joint coding, that is, the terminal device pair The first codebook and the second codebook are jointly coded.

It can be seen that when the terminal device sends the codebook, in addition to the information of the high-level configuration, it also considers the actual situation, making the codebook transmission more efficient and reasonable.

Wherein, a terminal device needs to select a corresponding physical uplink channel to send a codebook. The physical uplink channel is, for example, a physical uplink control channel, such as PUCCH, or it may also be a physical uplink data channel, such as a physical uplink shared channel (physical uplink shared channel). PUSCH). For the terminal device to determine the physical uplink channel, you can refer to the previous introduction to the current ACK / NACK feedback method in the NR standard. In simple terms, if the network device is configured with multiple PUCCH resource sets for the terminal device, for example, for the first code In this case, the terminal device first selects one of the PUCCH resource sets according to the number of bits in the first codebook, and then determines which PUCCH is selected from the PUCCH resource set according to the ARI in a received PDCCH, or according to the ARI and the implicit indication method. The resource sends the first codebook, where this PDCCH refers to the last PDSCH scheduled in the PDCCH successfully detected by the terminal device belongs to the first subset of candidate timings, and the corresponding ACK / NACK is fed back in the second time unit. One PDCCH. For the second codebook, the manner in which the terminal device selects the physical uplink channel is the same, and will not be described in detail.

For example, the terminal device chooses to carry the first codebook through the first physical uplink channel and to carry the second codebook through the second physical uplink channel. Then when sending the codebook, if the first physical uplink channel and the second physical uplink channel overlap in the time domain within the second time unit, and the terminal device continues to carry the first codebook through the first physical uplink channel, And carrying the second codebook through the second physical uplink channel, it is clear that the two will interfere with each other and may cause at least one of the codebooks to fail to be transmitted. Therefore, it is necessary to consider that the first physical uplink channel and the second physical uplink channel are in the second In the time unit, is there any overlap in the time domain?

Then, in the embodiment of the present application, sending the first codebook and / or the second codebook in the second time unit may include: carrying the first physical uplink channel of the first codebook and carrying the second codebook. Sending the first codebook on the first physical uplink channel and the second codebook on the second physical uplink channel if the time domain of the second physical uplink channel does not overlap in the second time unit; and / or, When the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in time domain in the second time unit, the first codebook is sent on the first physical uplink channel, or The second physical uplink channel sends a second codebook.

This can be understood as:

Details are described below.

In one embodiment, if the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook do not overlap in time domain in the second time unit, the terminal device may The uplink channel sends the first codebook and the second physical uplink channel sends the second codebook. At this time, the independently coded first codebook and the independently coded second codebook are sent, and the network device passes the first codebook. The physical uplink channel receives an independently encoded first codebook and the second physical uplink channel receives an independently encoded second codebook.

As a further extension, although the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook do not overlap in time domain in the second time unit, the first physical uplink channel and the And / or whether the second physical uplink channel overlaps with other physical uplink channels in the second time unit, because if at least one of the first physical uplink channel and / or the second physical uplink channel is The uplink channel has time domain overlap in the second time unit, so at least one codebook in the first codebook and the second codebook may still be interfered with during transmission. After considering other physical uplink channels, the processing method of the terminal device includes at least one of the following:

1. If neither the first physical uplink channel nor the second physical uplink channel overlaps the time domain of the third physical uplink channel in the second time unit, the terminal device can directly send the independently encoded first on the first physical uplink channel. The codebook and the independently-coded second codebook are sent on the second physical uplink channel, and the network device receives the independently-coded first codebook through the first physical uplink channel and obtains the independently-coded second codebook through the second physical uplink channel. The codebook is shown in Figure 5A. In FIG. 5A, the first physical uplink channel uses the first PUCCH as an example, and the second physical uplink channel uses the second PUCCH as an example.

2. Only one of the first physical uplink channel and the second physical uplink channel overlaps with the third physical uplink channel. Taking FIG. 5B as an example, the second physical uplink channel and the third physical uplink channel overlap in the time domain. Among them, The third physical uplink channel may include a PUCCH resource that carries other uplink control information (uplink control information, UCI), such as channel state information (CSI) or scheduling request (SR), or that carries uplink data. PUSCH resources. Then, an implementation method is that the terminal device can send an independently encoded first codebook on the first physical uplink channel, and perform information on the information carried on the second codebook and the third physical uplink channel (for example, including SR, CSI, and uplink data). (At least one of information such as (UL data)) to perform uplink multiplexing transmission, and the method of the uplink multiplexing transmission is the same as that in the prior art. For example, if the third physical uplink channel is PUSCH, the terminal device may change the second code. This carries the third physical uplink channel for joint transmission. Then, the network device may receive the independently encoded first codebook on the first physical uplink channel, and receive the jointly encoded second codebook and the information originally carried on the third physical uplink channel on the third physical uplink channel. Alternatively, taking FIG. 5B as an example, another implementation method is that the second physical uplink channel and the third physical uplink channel overlap in the time domain, and then the terminal device sends the first codebook after the independent coding on the first physical uplink channel. And you can choose to send one of the second physical uplink channel and the third physical uplink channel and silence the other. For example, if the terminal device sends the second physical uplink channel and the third physical uplink channel is silent, the network device can The physical uplink channel receives the independently encoded first codebook, and receives the independently encoded second codebook on the second physical uplink channel, or receives the uplink information on the third physical uplink channel. Specifically, if one of the second physical uplink channel and the third physical uplink channel is to be selected for transmission, there may be multiple selection methods, for example, random selection, or priority selection, priority transmission with higher priority, and so on. In FIG. 5B, the first physical uplink channel uses the first PUCCH as an example, and the second physical uplink channel uses the second PUCCH as an example.

3. If the first physical uplink channel and the second physical uplink channel overlap with the third physical uplink channel in the time domain, the terminal device performs priority processing or fallback processing.

Priority processing: As shown in FIG. 5C, the terminal device determines the priorities of the first codebook and the second codebook, assuming that the first codebook has a higher priority. At this time, the terminal device independently encodes the first codebook, and sends the independently encoded first codebook on the first physical uplink channel, and the terminal device encodes the information carried by the second codebook and the third physical uplink channel. Perform joint coding, and re-determine the joint coding information of the fourth physical uplink channel used to carry the information carried by the second codebook and the third physical uplink channel, wherein the fourth physical uplink channel and the first physical uplink channel are not in the time domain If they overlap, the network device receives the independently encoded first codebook on the first physical uplink channel, and receives the jointly encoded second codebook and the third physical uplink channel information originally carried on the fourth physical uplink channel. The priorities of the first codebook and the second codebook may be configured by a network device through high-level signaling, or may be predefined by a protocol. In FIG. 5C, the first physical uplink channel uses the first PUCCH as an example, and the second physical uplink channel uses the second PUCCH as an example.

Alternatively, the terminal device sends an independently coded first codebook through the first physical uplink channel, and sends the independently coded second codebook through the second physical uplink channel, and silences the third physical uplink channel, or the terminal device sends the third The physical uplink channel and silence the first physical uplink channel and the second physical uplink channel, or the terminal device sends an independently encoded first codebook through the first physical uplink channel, and silences the second physical uplink channel and the third physical uplink channel, Alternatively, the terminal device sends an independently encoded second codebook through the second physical uplink channel, and silences the first physical uplink channel and the third physical uplink channel.

The fourth physical uplink channel is, for example, PUCCH or PUSCH. For example, if the third physical uplink channel is PUCCH and the third physical uplink channel carries SR, the fourth physical uplink channel may be one of the second physical uplink channel and the third physical uplink channel; or, the third physical uplink channel is PUCCH, and the third physical uplink channel carries CSI, and the fourth physical uplink channel may be a PUCCH resource determined according to the total number of bits of the second codebook and CSI; or the third physical uplink channel is PUSCH, and the fourth physical uplink channel It may be the third physical uplink channel, and at this time, the fourth physical uplink channel always overlaps with the first physical uplink channel.

Wherein, if the fourth physical uplink channel and the first physical uplink channel overlap in the time domain, the terminal device can mute the third physical uplink channel, send an independently encoded first codebook on the first physical uplink channel, and When the independently coded second codebook is transmitted on the two physical uplink channels, the network device receives the independently coded first codebook on the first physical uplink channel and the independently coded second codebook on the second physical uplink channel.

Fallback processing: As shown in FIG. 5D, the terminal device may jointly encode information (such as SR, CSI, or uplink data) carried by the first codebook, the second codebook, and the third physical uplink channel, and according to the third The type of information carried by the physical uplink channel, and / or the total number of bits of information carried by the first codebook, the second codebook, and the third physical uplink channel. A fifth physical uplink channel is determined, and the fifth physical uplink channel is determined. Send the jointly encoded information of the information carried by the first codebook, the second codebook, and the third physical uplink channel, and then the network device receives the combined encoding of the first codebook, the second codebook, and the CSI on the fifth physical uplink channel. Post information. In FIG. 5D, the first physical uplink channel uses the first PUCCH as an example, and the second physical uplink channel uses the second PUCCH as an example.

The previous embodiment describes the case where the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook do not overlap in the time domain in the second time unit. An embodiment is described below. , Is the case where the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in the time domain in the second time unit, where, as described above, the first The processing method of a case where a physical uplink channel and a second physical uplink channel carrying a second codebook do not overlap in the time domain in a second time unit is the same as that described below for the first physical uplink channel carrying the first codebook and The processing method for the case where the second physical uplink channel carrying the second codebook overlaps in the time domain in the second time unit. The two methods may coexist, or only one of the processing methods may be selected.

If the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in time domain in the second time unit, the terminal device may send the first codebook on the first physical uplink channel. The second codebook is not sent on the second physical uplink channel, or the terminal device does not send the second codebook on the second physical uplink channel, and does not send the first codebook on the first physical uplink channel. Wherein, if the terminal device sends the first codebook on the first physical uplink channel, the first codebook after independent encoding is sent, and the network device receives the first codebook after independent encoding. When the physical uplink channel sends the second codebook, the independently coded second codebook is sent, and the network device receives the independently coded second codebook. Or, if the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in the time domain in the second time unit, the terminal device may also perform the first codebook and the second code Perform joint coding, and determine the sixth physical uplink channel according to the total number of bits of the first codebook and the second codebook, and transmit the jointly coded information of the first codebook and the second codebook on the sixth physical uplink channel , Then the network device receives the first codebook and the second codebook after joint coding on the sixth physical uplink channel.

Specifically, if the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in time domain in the second time unit, the terminal device performs priority processing or fallback processing.

Priority processing: The terminal device selects a codebook with a higher priority from the first codebook and the second codebook. The priority information of the codebook can be configured by the network device through high-level signaling or predefined by the protocol. For example, the codebook identification information corresponds to the PDSCH mapping type, and the codebook corresponding to the PDSCH mapping typeB has a higher priority; for example, the codebook identification information corresponds to the PDSCH time domain length, for example, the PDSCH time domain length is less than Or equal to Y corresponds to the first codebook, and the PDSCH time domain length is greater than Y corresponds to the second codebook, and the first codebook can be predefined to have a higher priority. At this time, the terminal device will send a high-priority codebook on the corresponding physical uplink channel, and silence or stop sending another codebook on another physical uplink channel, that is, the terminal device sends on the first physical uplink channel. If the first codebook does not send the second codebook on the second physical uplink channel, the network device receives the first codebook on the first physical uplink channel and does not receive the second codebook on the second physical uplink channel. If the two physical uplink channels send the second codebook and the first physical uplink channel does not send the first codebook, the network device receives the second codebook on the second physical uplink channel and does not receive the first codebook on the first physical uplink channel. As shown in FIG. 6A, for example, if the priority of the first codebook is higher, the terminal device sends the first codebook and silences the second codebook. In FIG. 6A, the first physical uplink channel uses the first PUCCH as an example, and the second physical uplink channel uses the second PUCCH as an example.

Fallback processing: The terminal device generates a third codebook according to the first codebook and the second codebook. For example, the third codebook is obtained by concatenating the first codebook and the second codebook. Further, the terminal device determines the seventh physical uplink channel according to the load size of the third codebook and the detected ARI information in the PDCCH, and sends the third codebook using the seventh physical uplink channel, as shown in FIG. 6B. In FIG. 6B, the first physical uplink channel uses the first PUCCH as an example, the second physical uplink channel uses the second PUCCH as an example, and the seventh physical uplink channel uses the seventh PUCCH as an example.

As mentioned earlier, when selecting the physical uplink channel for sending the codebook, the number of bits of the codebook is needed. The number of bits in the first codebook can be determined by the maximum number of non-time-domain overlapping candidate reception opportunities in the first candidate receiving opportunity subset, and the number of bits in the second codebook can be determined by the second candidate receiving opportunity subset. The maximum number of non-time-domain overlapping candidate reception opportunities is determined. For example, for single-carrier downlink transmission or single BWP downlink transmission, the number of bits in the first codebook is equal to the non-time-domain overlapping candidates in the first candidate reception timing subset. The maximum number of reception timings, and the number of bits in the second codebook are equal to the maximum number of non-time-domain overlapping candidate reception timings in the second candidate reception timing subset. That is, in a subset of candidate reception opportunities, the candidate reception opportunities that overlap in the time domain are divided into multiple candidate reception units, and each candidate reception unit includes multiple candidate reception opportunities that overlap in the time domain. These The candidate reception timings with overlapping time domains cannot be transmitted at the same time, so only one corresponding ACK / NACK is needed. Of course, this description in this article is based on the example that the first time unit set belongs to one downlink frequency unit. If the first time unit set belongs to multiple downlink frequency units, for each downlink frequency unit, the method described in this article can be used. Determine the number of bits in the codebook.

But in addition, NR is currently discussing that downlink terminal equipment can superimpose transmission or preempt transmission. That is, when the network device has scheduled a PDSCH resource for the terminal device, for example, PDSCH 1 corresponding to PDCCH 1 for transmitting eMBB services, but the emergency URLLC service of the terminal device arrives later, the network device will A new PDSCH resource is scheduled in a part overlapping with the PDSCH time domain, for example, PDSCH 2, corresponding to PDCCH 2, PDCCH 2 is later in time than PDCCH 1, and PDSCH 2 is used to carry URLLC services. At this time, PDSCH 2 can be considered for superimposed transmission with PDSCH 1, especially when the frequency domains of the two do not overlap, or the network device can only transmit PDSCH 2 and stop transmitting PDSCH 1, at least when transmission stops overlapping with PDSCH 2 PDSCH on the domain symbol.

According to the introduction of this article, the terminal device in this article uses the segmentation method when determining the codebook, that is, in a time unit, if there are multiple candidate receiving opportunities that overlap in the time domain, these multiple Opportunities for receiving candidates are likely to be divided into a group. For this group, the terminal device only transmits one ACK / NACK, and does not transmit ACK / NACK for each candidate receiving opportunity. This obviously overlaps with the above. The process of transmission is contradictory. In addition, even if the network device performs preemptive transmission, that is, only transmits PDSCH 2 and does not transmit PDSCH 1, once the terminal device fails to detect the PDCCH scheduling PDSCH 2, it will continue to try to receive PDSCH 1 and generate an ACK / PDSCH1 according to the decoding result. NCK feeds back to the network equipment, but the network equipment will interpret the ACK / NCK as the decoding result of PDSCH, causing the network equipment and terminal equipment to misalign the understanding of the HARQ-ACK codebook, which will cause a lot of HARQ-ACK retransmissions. Impact, which in turn causes downlink transmission failure.

It can be seen that in the process of determining the codebook in the existing semi-static codebook mode, the candidate reception timings with overlapping time domains may only be counted once, that is, the time domain within the unit when it is divided into 1 PDSCH reception. The overlapping multiple candidate reception timings will only generate one ACK / NACK. Then, considering the scheme of superimposed transmission, in the embodiment of the present application, the network device may set different codebook identification information for candidate receiving timings that originally belonged to a receiving unit, so as to assign the original Candidate receiving opportunities with overlapping domains are assigned to different subsets of candidate receiving opportunities, and different codebooks corresponding to different candidate receiving opportunity subsets are different, which is equivalent to assigning candidate receivers that originally belong to a receiving unit with overlapping time domains. The ACK / NACK corresponding to the timing is assigned to different codebooks. For example, the first candidate reception timing subset includes the first candidate reception timing, the second candidate reception timing subset includes the second candidate reception timing, and the first candidate reception timing belongs to The candidate reception time unit of and the candidate reception time unit to which the second candidate reception opportunity belongs may overlap in the time domain. Therefore, ACK / NACKs can also be generated and fed back for candidate receiving opportunities that originally belong to a unit that overlaps the time domain, so that the granularity of the feedback ACK / NACK can be finer, and the feedback result can accurately reflect more The reception status of the PDSCH transmitted in the candidate reception timing.

In order to more intuitively understand the method introduced above, another embodiment is provided below. The following embodiment is a specific example of the method described in FIG. 4. Please refer to FIG. 7, which is a flowchart of a specific method for sending and receiving codebook information. The method shown in FIG. 7 is a specific example of the method for sending and receiving codebooks shown in FIG. 4.

S71. The network device sends high-level signaling to the terminal device, and the terminal device receives the high-level signaling from the network device. The high-level signaling is, for example, RRC signaling, and the high-level signaling in S71 may be one signaling or multiple signalings.

Through this high-level signaling, the information configured by the network device for the terminal device includes:

Configuration 1: DL's subcarrier spacing (SCS) and UL's subcarrier spacing. For example, the SCS of DL and SCS of UL are both 15kHz.

Configuration 2: Information of the PUCCH resource set used to carry ACK / NCK. For example, the network device configures K + 1 PUCCH resource sets for the terminal device, K = 2, and the ACK / NCK payload size interval corresponding to the kth PUCCH resource set is [N _k , N _{k + 1} ), where N ₀ = 1, N ₁ = 3, N ₂ = 12, and N ₃ is infinite or large to ensure the maximum feedback ACK / NCK load. And the number of PUCCH resources included in the k-th PUCCH resource set is M _k , where M ₀ = 16 and M ₁ = M ₂ = 8.

Configuration 3: feedback granularity of ACK / NACK, for example, configure ACK / NCK feedback with transmission block (TB) as granularity, then it means that there is no need to perform ACK / NCK feedback with CBG as granularity, only TB with ACK as granularity / NCK feedback. For example, through configuration 3, the number of TBs transmitted by one PDSCH is also configured. For example, the number is 1, that is, one PDSCH only carries one TB.

Configuration 4: K1 value set. For example, the value set of K1 is {2,4,6}. For example, the second time unit corresponding to the value set of K1 is time slot n, that is, the first time unit set includes three first time units. Taking the time unit as a time slot as an example, the first time unit set includes The three timeslots are timeslot n-2, timeslot n-4, and timeslot n-6.

Configuration 5: The length of the TimeDomainResourceAllocation in the PDCCH is 4 bits, and corresponding first parameter groups are respectively configured for 16 types of values. The first parameter group is {K0, SLIV, PDSCH Mapping type, codebook identification information}.

For example, two codebook identification information, 0 and 1, are configured through high-level signaling, where codebook identification information 0 corresponds to PDSCH Mapping Type A, and codebook identification information 1 corresponds to PDSCH Mapping Type B. The specific configuration of SLIV, PDSCH Mapping Type, and codebook identification information is shown in Figure 8, where #n indicates that the PDSCH corresponds to TimeDomainResourceAllocation value n, and the number in parentheses () after #n indicates that one The identification of the candidate reception unit after segmenting the candidate reception opportunities in the slot (that is, as described above, segmenting a time slot will obtain at least one candidate reception unit, and each candidate reception unit Including at least one candidate reception timing, and for one candidate reception timing of the unit, the terminal device only sends one ACK / NACK). It should be noted that, for the

codebook identifiers

0 and 1, segmentation and grouping of candidate reception timings are required to determine the number of bits of the first codebook and the number of bits of the second codebook, respectively.

S72. The network device sends the PDCCH 1 to the terminal device on the time slot # (n-6), and the terminal device receives the PDCCH 1 from the network device on the time slot # (n-6). Among them, PDCCH1 is used to schedule PDSCH1 in this time slot, corresponding to # 0 in FIG. 8, the PDSCH mapping type is TypeA, the corresponding codebook identification information is 0, and ARI is "000". Refer to Figure 9.

For example, the terminal device successfully receives PDCCH 1 and decodes PDSCH 1 successfully, and the terminal device generates ACK1.

S73. The network device sends the PDCCH 2 to the terminal device on the time slot # (n-4), and the terminal device receives the PDCCH 2 from the network device on the time slot # (n-4). Among them, PDCCH 2 is used to schedule PDSCH 2 in this time slot, corresponding to # 13 in FIG. 8, the PDSCH mapping type is Type B, the corresponding codebook identification information is 1, and ARI is "001". Continue to refer to FIG. 9.

For example, if the terminal device successfully receives the PDCCH 2 but fails to decode the PDSCH 2, the terminal device generates a NACK 2.

S74. The network device sends the PDCCH 3 to the terminal device on the time slot # (n-2), and the terminal device receives the PDCCH 3 from the network device on the time slot # (n-2). Among them, PDCCH 3 is used to schedule PDSCH 3 in this time slot, corresponding to # 1 in FIG. 8, the PDSCH mapping type is Type A, the corresponding codebook identification information is 0, and ARI is "010". In addition, another candidate receiving opportunity of the network device on the slot # (n-2) sends the PDCCH 4 to the terminal device, and the terminal device receives the PDCCH 4 from the network device on the slot # (n-2). Among them, PDCCH 4 is used to schedule PDSCH 4 in this time slot, corresponding to # 12 in FIG. 8, the PDSCH mapping type is Type B, the corresponding codebook identification information is 1, and ARI is "001". Continue to refer to FIG. 9.

Among them, PDSCH 3 and PDSCH 4 overlap in the time domain, and may or may not overlap in the frequency domain.

For example, the terminal device successfully receives PDCCH 3, but fails to decode PDSCH 3, the terminal device generates NACK 3 for PDSCH 3, and the terminal device successfully receives PDCCH 4, and decodes PDSCH 4 successfully, then the terminal device generates ACK 4.

S75. Prior to time slot #n, the terminal device completes the process of determining a subset of candidate receiving opportunities, generating a first codebook and a second codebook, and determining a physical uplink channel.

Regarding the determination of a subset of candidate receiving timings: the terminal device groups PDSCH 1 to 4 according to the value of TimeDomainResourceAllocation of PDSCH 1-4, specifically, the value of TimeDomainResourceAllocation indicates the value of the codebook identification information. It can be seen that PDSCH 1 The codebook identification information for PDSCH 3 is 0, and PDSCH 1 and PDSCH 3 are divided into the first group. That is, the candidate reception timings corresponding to PDSCH1 and the candidate reception timings corresponding to PDSCH3 are divided into a subset of candidate reception timings. One group is referred to as group A. For example, group A is a subset of the first candidate reception timing. The codebook identification information of PDSCH 2 and PDSCH 4 is 1. The PDSCH 2 and PDSCH 4 are divided into the second group, that is, the candidate reception corresponding to PDSCH 2. The timing and the candidate reception timing corresponding to PDSCH4 are divided into another subset of candidate reception timings, and the second group is referred to as group B, and group B is, for example, the second candidate reception timing subset.

About generating codebooks:

For group A, according to the value set of K1, we know that the potential PDSCH time slots are # (n-6), # (n-4), and # (n-2). For each potential PDSCH time slot, according to It can be seen from FIG. 8 that the candidate receiving timing corresponding to the codebook identification information 0 corresponds to only one candidate receiving unit. Therefore, only one ACK / NACK is generated for each potential PDSCH slot. Therefore, the codebook of group A, that is, The first codebook is {ACK1, X, NACK3}, where X represents the ACK / NACK corresponding to the unit when a potential candidate is received on slot # (n-4), and can be set to NACK.

For group B, according to the value set of K1, it can be known that the potential PDSCH time slots are # (n-6), # (n-4), and # (n-2). For each potential PDSCH time slot, according to It can be seen from FIG. 8 that the candidate receiving timing corresponding to the codebook identification information 1 corresponds to 4 candidate receiving units. Therefore, for each potential PDSCH slot, 4 ACK / NACKs are generated, respectively corresponding to the candidate receiving unit (# 4, # 6, # 12), (# 7, # 9, # 13), (# 5, # 8, # 10, # 14), and (# 11, # 15). Therefore, the codebook of group B, that is, the second codebook is {(Y, Y, Y, Y), (Y, NCK2, Y, Y), (ACK4, Y, Y, Y)}, where Y represents The ACK / NACK corresponding to the crew when the candidate reception of the PDSCH is not received may be set to NACK.

It can be seen that # 1 and # 12 are assigned to a candidate reception unit in a time slot. If according to the existing technology, only one ACK / will be fed back for the two candidate reception opportunities of # 1 and # 12. NACK, but in this embodiment, the network device sets the codebook identification information 0 for # 1, and sets the codebook identification information 1 for # 12, that is, the set is different for the candidate receivers that overlap in the time domain. Codebook identification information, so that the ACK / NACKs corresponding to candidate reception opportunities # 1 and # 12 that originally belonged to a unit at the time of reception and overlap in time domain are allocated to different codebooks. Candidates with overlapping time domains within the crew can separately generate ACK / NACK and provide feedback, making the granularity of the feedback ACK / NACK finer, and the feedback result can accurately reflect the reception of PDSCH transmitted in more candidate reception occasions. status.

About determining PUCCH resources:

For group A, since a PDSCH contains only 1 TB, and only TB granularity ACK / NACK feedback is needed, the number of bits in the first codebook is 3, and the load size of the feedback ACK / NACK is 3. According to the payload size of 3, the second PUCCH resource set may be selected, and then based on the ARI in the last DCI being "010", it is determined that the third PUCCH resource in the second PUCCH resource set is selected to transmit the first codebook.

For group B, since one PDSCH contains only one TB, and only TB granularity ACK / NACK feedback is needed, the number of bits in the second codebook is 12, and the load size of the feedback ACK / NACK is 12. According to the payload size of 12, the third PUCCH resource set may be selected, and then based on the ARI in the last DCI being "001", it is determined that the second PUCCH resource in the third PUCCH resource set is selected to transmit the second codebook.

S76. In slot #n, the terminal device sends the first codebook on the third PUCCH resource in the second PUCCH resource set, and sends the second codebook on the second PUCCH resource in the third PUCCH resource set. Codebook, the terminal device receives the first codebook from the terminal device on the third PUCCH resource in the second PUCCH resource set in slot #n, and the second one in the third PUCCH resource set A second codebook from the terminal device is received on the PUCCH resource. You can continue to refer to FIG. 9, for example, the first PUCCH from left to right in FIG. 9 is the third PUCCH resource in the second PUCCH resource set, and the second PUCCH is the second PUCCH in the third PUCCH resource set. PUCCH resources. Wherein, the terminal device sends the independently encoded first codebook and the independently encoded second codebook, and the network device receives the independently encoded first codebook and the independently encoded second codebook.

As shown in FIG. 9, the third PUCCH resource in the second PUCCH resource set and the second PUCCH resource in the third PUCCH resource set do not overlap in the time domain in the time slot n, so , The terminal device may send the first codebook on the third PUCCH resource in the second PUCCH resource set, and the second codebook on the second PUCCH resource in the third PUCCH resource set. The sending process of the codebook will not interfere with each other, and can be transmitted normally.

In short, in the embodiment of the present application, the feedback information can be divided into different codebooks, so that the first codebook and the second codebook can be processed separately, and it is not necessary to send all the feedback information as one codebook. Therefore, the transmission delay of the feedback information can be effectively reduced, thereby reducing the transmission delay of the downlink data accordingly.

The device provided in the embodiments of the present application is described below with reference to the drawings.

FIG. 10 is a schematic structural diagram of a communication device 1000. The communication device 1000 can implement the functions of the terminal equipment mentioned above. The communication device 1000 may be a terminal device described above, or may be a chip provided in the terminal device described above. The communication device 1000 may include a processor 1001 and a transceiver 1002. The processor 1001 may be used to execute S43 in the embodiment shown in FIG. 4 and / or other processes for supporting the technology described herein. The transceiver 1002 may be used to execute the embodiment shown in FIG. 4. S41, S42, and S44, and / or other processes for supporting the technology described herein; or, the processor 1001 may be used to perform S75 in the embodiment shown in FIG. 7 and / or for supporting the technology described herein. For other processes of the techniques described, the transceiver 1002 may be used to perform S71, S72, S73, S74, and S76 in the embodiment shown in FIG. 7 and / or other processes for supporting the techniques described herein.

For example, the transceiver 1002 is configured to receive at least one physical downlink data channel at a candidate receiving opportunity in a first set of time units, where the first set of time units includes M candidate receiving opportunities, where M is an integer greater than 1, The M candidate receiving timings are divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information, wherein the codebook identification information includes the first codebook identification information and the second codebook Identification information, the first candidate receiving opportunity subset corresponds to the first codebook identification information, and the second candidate receiving opportunity subset corresponds to the second codebook identification information;

A processor 1001, configured to generate a feedback information codebook according to a receiving status of the at least one physical downlink data channel, where the feedback information codebook includes a first codebook and a second codebook, and the first codebook and the The first candidate receiving opportunity subset corresponds, and the second codebook corresponds to the second candidate receiving opportunity subset;

The transceiver 1002 is further configured to send the first codebook and / or the second codebook in a second time unit.

Wherein, all relevant content of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here.

FIG. 11 is a schematic structural diagram of a communication device 1100. The communication device 1100 can implement the functions of the terminal equipment mentioned above. The communication device 1100 may be the network device described above, or may be a chip provided in the network device described above. The communication device 1100 may include a processor 1101 and a transceiver 1102. The processor 1101 may be configured to execute a process of generating configuration information and a process of determining a physical uplink channel of a received codebook in the embodiment shown in FIG. 4 and / or other processes for supporting the technology described herein. The transceiver 1102 may be used to perform S41, S42, and S44 in the embodiment shown in FIG. 4 and / or other processes for supporting the technology described herein; or, the processor 1101 may be used to perform the process shown in FIG. 7. In the illustrated embodiment, the process of generating configuration information, the process of determining a physical uplink channel for receiving a codebook, and / or other processes for supporting the techniques described herein, the transceiver 1102 may be used to execute the process shown in FIG. 7. S71, S72, S73, S74, and S76 in the embodiments, and / or other processes used to support the techniques described herein.

For example, the transceiver 1102 is configured to send at least one physical downlink data channel in a candidate receiving opportunity in a first set of time units, where the first set of time units includes M candidate receiving opportunities, where M is an integer greater than 1, The M candidate receiving timings are divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information, wherein the codebook identification information includes the first codebook identification information and the second codebook Identification information, the first candidate receiving opportunity subset corresponds to the first codebook identification information, and the second candidate receiving opportunity subset corresponds to the second codebook identification information;

The transceiver 1102 is further configured to receive a first codebook and / or a second codebook in a second time unit, where the first codebook corresponds to the first subset of candidate reception opportunities, and the second codebook is related to The second candidate receiving opportunity subset corresponds.

In a simple embodiment, those skilled in the art can think that the communication device 1000 or the communication device 1100 can also be implemented by the structure of the communication device 1200 as shown in FIG. 12A. The communication device 1200 may implement the functions of the terminal equipment or the network equipment mentioned above. The communication device 1200 may include a processor 1201.

Wherein, when the communication device 1200 is used to implement the functions of the terminal device mentioned above, the processor 1201 may be used to execute S43 in the embodiment shown in FIG. 4 and / or used to support the technology described herein. Other processes; or, when the communication device 1200 is used to implement the functions of the terminal device mentioned above, the processor 1201 may be used to execute S75 in the embodiment shown in FIG. 7 and / or used to support the description in this document Other processes of the technology; or, when the communication device 1200 is used to implement the functions of the network device involved above, the processor 1201 may be configured to execute a process of generating configuration information in the embodiment shown in FIG. 4 and determine A process such as receiving a physical uplink channel of a codebook, and / or other processes for supporting the technology described herein; or, when the communication device 1200 is used to implement the functions of the network device mentioned above, the processor 1201 may use For performing the process of generating configuration information in the embodiment shown in FIG. 7 and the process of determining a physical uplink channel for receiving a codebook, and / or for supporting the technology described herein Other processes.

Among them, the communication device 1200 can pass through a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system chip (SoC), and a central processor (central processor). unit (CPU), network processor (NP), digital signal processor (DSP), microcontroller (microcontroller unit, MCU), or programmable controller (programmable logic device, PLD) or other integrated chips, the communication device 1200 may be set in the terminal device or network device in the embodiment of the present application, so that the terminal device or network device implements the method provided in the embodiment of the present application.

In an optional implementation manner, the communication apparatus 1200 may include a transceiver component for communicating with other devices.

Wherein, when the communication device 1200 is used to implement the functions of the terminal equipment or network equipment mentioned above, the transceiver component may be used to execute S41, S42, and S44 in the embodiment shown in FIG. 4 and / or used to support Other processes of the technology described herein; or, when the communication device 1200 is used to implement the functions of the terminal device or the network device mentioned above, the transceiver component may be used to execute S71 and S72 in the embodiment shown in FIG. 7 , S73, S74, and S76, and / or other processes to support the techniques described herein.

In an optional implementation manner, the communication device 1200 may further include a memory 1202, as shown in FIG. 12B. The memory 1202 is configured to store computer programs or instructions, and the processor 1201 is configured to decode and execute these computer programs or instructions. . It should be understood that these computer programs or instructions may include the functional programs of the foregoing terminal device or network device. When the functional program of the terminal device is decoded and executed by the processor 1201, the terminal device can be caused to implement the functions of the terminal device in the method shown in FIG. 4 in the embodiment of the present application or the method provided in the embodiment shown in FIG. When the functional program of the network device is decoded and executed by the processor 1201, the network device may be enabled to implement the functions of the network device in the method shown in FIG. 4 or the method provided in the embodiment shown in FIG.

In another optional implementation manner, the function programs of these terminal devices or network devices are stored in a memory external to the communication device 1200. When the function program of the terminal device is decoded and executed by the processor 1201, a part or all of the function program of the terminal device is temporarily stored in the memory 1202. When the function program of the network device is decoded and executed by the processor 1201, a part or all of the content of the function program of the network device is temporarily stored in the memory 1202.

In another optional implementation manner, the function programs of these terminal devices or network devices are set in a memory 1202 stored in the communication device 1200. When the function program of the terminal device is stored in the memory 1202 inside the communication device 1200, the communication device 1200 may be set in the terminal device in the embodiment of the present application. When the function program of the network device is stored in the memory 1202 inside the communication device 1200, the communication device 1200 may be set in the network device in the embodiment of the present application.

In another optional implementation manner, part of the content of the functional programs of these terminal devices is stored in a memory external to the communication device 1200, and other content of the functional programs of these terminal devices is stored in a memory 1202 inside the communication device 1200. Or, part of the content of the function program of these network devices is stored in a memory external to the communication device 1200, and other content of the function program of these network devices is stored in a memory 1202 inside the communication device 1200.

In the embodiment of the present application, the communication device 1000, the communication device 1100, and the communication device 1200 are presented in the form of dividing each functional module into corresponding functions, or may be presented in the form of dividing each functional module in an integrated manner. The "module" herein may refer to an ASIC, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other devices capable of providing the above functions.

In addition, the communication device 1000 provided in the embodiment shown in FIG. 10 may also be implemented in other forms. For example, the communication device includes a processing module and a transceiver module. For example, the processing module may be implemented by the processor 1001, and the transceiver module may be implemented by the transceiver 1002. The processing module may be used to execute S43 in the embodiment shown in FIG. 4 and / or other processes to support the technology described herein. The transceiver module may be used to execute S41 in the embodiment shown in FIG. 4. , S42 and S44, and / or other processes for supporting the technology described herein; or, the processing module may be used to perform S75 in the embodiment shown in FIG. 7 and / or for supporting the technology described herein For other processes, the transceiver module may be used to perform S71, S72, S73, S74, and S76 in the embodiment shown in FIG. 7 and / or other processes for supporting the technology described herein.

For example, a transceiver module is configured to receive at least one physical downlink data channel at a candidate receiving opportunity in a first set of time units, where the first set of time units includes M candidate receiving opportunities, where M is an integer greater than 1, and The M candidate receiving timings are divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information, where the codebook identification information includes the first codebook identification information and the second codebook identification Information, the first candidate receiving opportunity subset corresponds to the first codebook identification information, and the second candidate receiving opportunity subset corresponds to the second codebook identification information;

A processing module, configured to generate a feedback information codebook according to a reception status of the at least one physical downlink data channel, where the feedback information codebook includes a first codebook and a second codebook, and the first codebook and the first codebook A candidate receiving opportunity subset corresponds, and the second codebook corresponds to the second candidate receiving opportunity subset;

The transceiver module is further configured to send the first codebook and / or the second codebook in a second time unit.

The communication device 1100 provided in the embodiment shown in FIG. 11 may also be implemented in other forms. For example, the communication device includes a processing module and a transceiver module. For example, the processing module may be implemented by the processor 1101, and the transceiver module may be implemented by the transceiver 1102. The processing module may be used to perform a process of generating configuration information and a process of determining a physical uplink channel of a received codebook in the embodiment shown in FIG. 4 and / or other processes for supporting the technology described herein, The transceiver module may be used to execute S41, S42, and S44 in the embodiment shown in FIG. 4 and / or other processes to support the technology described herein; or, the processing module may be used to execute the implementation shown in FIG. 7 In the example, the process of generating configuration information, the process of determining the physical uplink channel of the received codebook, and / or other processes for supporting the technology described herein, the transceiver module may be used to execute the embodiment shown in FIG. 7. S71, S72, S73, S74, and S76, and / or other processes used to support the techniques described herein.

For example, a transceiver module is configured to send at least one physical downlink data channel in a candidate receiving opportunity in a first set of time units, where the first set of time units includes M candidate receiving opportunities, where M is an integer greater than 1, and The M candidate receiving timings are divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information, where the codebook identification information includes the first codebook identification information and the second codebook identification Information, the first candidate receiving opportunity subset corresponds to the first codebook identification information, and the second candidate receiving opportunity subset corresponds to the second codebook identification information;

The transceiver module is further configured to receive a first codebook and / or a second codebook in a second time unit, the first codebook corresponding to the first candidate receiving timing subset, and the second codebook and The second candidate reception timing subset correspondence is described.

Since the communication device 1000, the communication device 1100, and the communication device 1200 provided in the embodiments of the present application can be used to execute the method provided in the embodiment shown in FIG. 4 or the embodiment shown in FIG. 7, the technical effects that can be obtained can be obtained. With reference to the foregoing method embodiments, details are not described herein again.

Embodiments of the present application are described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, so that instructions generated by the processor of the computer or other programmable data processing device may be used to Means for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

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, it 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 instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are wholly or partially generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a server, or a data center. Wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server or data center for transmission. 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, a data center, or the like that includes one or more available medium integration. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD) ))Wait.

Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and variations.

Claims

A method for sending codebook information includes:

Receive at least one physical downlink data channel at a candidate receiving opportunity in a first set of time units, the first set of time units including M candidate receiving opportunities, where M is an integer greater than 1, and the M candidate receiving opportunities are in accordance with codes The identification information is divided into a first candidate receiving opportunity subset and a second candidate receiving opportunity subset, wherein the codebook identification information includes first codebook identification information and second codebook identification information, and the first candidate The subset of receiving timings corresponds to the first codebook identification information, and the second candidate receiving timing subset corresponds to the second codebook identification information;

Generating a feedback information codebook according to the receiving status of the at least one physical downlink data channel, the feedback information codebook including a first codebook and a second codebook, the first codebook and the first candidate receiving opportunity Set correspondence, and the second codebook corresponds to the second candidate receiving opportunity subset;

Sending the first codebook and / or the second codebook at a second time unit.
The method according to claim 1, wherein:

Each of the M candidate receiving opportunities corresponds to a first parameter group, and the first parameter group includes codebook identification information and includes at least one of the following information: physical downlink data channel and physical downlink control Timing offset between channels, time domain location information of the physical downlink data channel, and physical downlink data channel mapping type; or,

Each of the M candidate receiving opportunities corresponds to a second parameter group, where the second parameter group includes a physical downlink data channel mapping type and includes at least one of the following information: physical downlink data channel and physical A timing offset between downlink control channels and time domain location information of a physical downlink data channel, wherein the codebook identification information corresponds to the physical downlink data channel mapping type; or,

Each of the M candidate receiving opportunities corresponds to a third parameter group, and the third parameter group includes time domain position information of a physical downlink data channel, and includes at least one of the following information: physical downlink data The timing offset between the channel and the physical downlink control channel, and the physical downlink data channel mapping type, where the codebook identification information corresponds to the time domain location information of the physical downlink data channel.
The method according to claim 2, wherein the codebook identification information corresponds to time domain location information of the physical downlink data channel, and includes at least one of the following two types of correspondence relationships:

The codebook identification information corresponds to a number of a start symbol of the physical downlink data channel; or,

The codebook identification information corresponds to a time domain length of the physical downlink data channel.
The method according to any one of claims 1 to 3, wherein sending the first codebook and / or the second codebook in the second time unit comprises:

The second candidate receiving opportunity subset has a second association relationship with the second time unit, and the second candidate receiving opportunity subset does not have the second association relationship with the second time unit. The second time unit sends the first codebook; or

The second candidate receiving opportunity subset does not have a second association relationship with the second time unit, and the second candidate receiving opportunity subset has the second association relationship with the second time unit. The second time unit sends the second codebook; or,

The second candidate receiving opportunity subset has a second association relationship with the second time unit, and the second candidate receiving opportunity subset has the second association relationship with the second time unit. The second time unit sends the first codebook and / or the second codebook.
The method according to claim 4, wherein sending the first codebook and / or the second codebook in the second time unit comprises:

When the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook do not overlap in the time domain in the second time unit, in the first physical Sending the first codebook on an uplink channel, and sending the second codebook on the second physical uplink channel; and / or,

When the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in the time domain in the second time unit, the first physical uplink Sending the first codebook on a channel, or sending the second codebook on the second physical uplink channel.
The method according to claim 4 or 5, characterized in that:

A first association relationship exists between the second time unit and the first time unit set, and the first association relationship is the first time unit set configured or predefined by high-level signaling and the second time Semi-static correspondence between units; and / or,

The second association relationship is a dynamic correspondence relationship between a physical downlink data channel indicated by a physical downlink control channel and the second time unit.
The method according to any one of claims 1 to 6, characterized in that:

The number of bits of the first codebook is determined according to the maximum number of candidate reception opportunities in the first candidate receiving opportunity subset that do not overlap in the time domain, and the number of bits of the second codebook is according to the second The maximum number of candidate receiving opportunities in the candidate receiving opportunity subset that do not overlap in the time domain is determined.
A method for receiving codebook information, comprising:

Sending at least one physical downlink data channel in a candidate receiving opportunity in a first set of time units, the first set of time units including M candidate receiving opportunities, where M is an integer greater than 1, and the M candidate receiving opportunities are in accordance with codes The identification information is divided into a first candidate receiving opportunity subset and a second candidate receiving opportunity subset, wherein the codebook identification information includes first codebook identification information and second codebook identification information, and the first candidate The subset of receiving timings corresponds to the first codebook identification information, and the second candidate receiving timing subset corresponds to the second codebook identification information;

Receiving a first codebook and / or a second codebook at a second time unit, the first codebook corresponding to a subset of the first candidate receiving opportunity, and the second codebook and the second candidate receiving opportunity Subset correspondence.
The method according to claim 8, wherein:

Each of the M candidate receiving opportunities corresponds to a first parameter group, and the first parameter group includes codebook identification information and includes at least one of the following information: physical downlink data channel and physical downlink control Timing offset between channels, time domain location information of the physical downlink data channel, and physical downlink data channel mapping type; or,

Each of the M candidate receiving opportunities corresponds to a second parameter group, where the second parameter group includes a physical downlink data channel mapping type and includes at least one of the following information: physical downlink data channel and physical A timing offset between downlink control channels and time domain location information of a physical downlink data channel, wherein the codebook identification information corresponds to the physical downlink data channel mapping type; or,

Each of the M candidate receiving opportunities corresponds to a third parameter group, and the third parameter group includes time domain position information of a physical downlink data channel, and includes at least one of the following information: physical downlink data The timing offset between the channel and the physical downlink control channel, and the physical downlink data channel mapping type, where the codebook identification information corresponds to the time domain location information of the physical downlink data channel.
The method according to claim 9, wherein the codebook identification information corresponds to time-domain location information of the physical downlink data channel, and includes at least one of the following two correspondences:

The codebook identification information corresponds to a number of a start symbol of the physical downlink data channel; or,

The codebook identification information corresponds to a time domain length of the physical downlink data channel.
The method according to any one of claims 8 to 10, wherein receiving the first codebook and / or the second codebook in the second time unit comprises:

The second candidate receiving opportunity subset has a second association relationship with the second time unit, and the second candidate receiving opportunity subset does not have the second association relationship with the second time unit. Said second time unit receiving said first codebook; or,

The second candidate receiving opportunity subset does not have a second association relationship with the second time unit, and the second candidate receiving opportunity subset has the second association relationship with the second time unit. Said second time unit receiving said second codebook; or,

The second candidate receiving opportunity subset has a second association relationship with the second time unit, and the second candidate receiving opportunity subset has the second association relationship with the second time unit. The second time unit receives the first codebook and / or the second codebook.
The method according to claim 11, wherein receiving the first codebook and / or the second codebook in the second time unit comprises:

When the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook do not overlap in the time domain in the second time unit, in the first physical Receiving the first codebook on an uplink channel, and receiving the second codebook on the second physical uplink channel; and / or,

When the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in the time domain in the second time unit, the first physical uplink Receiving the first codebook on a channel, or receiving the second codebook on the second physical uplink channel.
The method according to claim 11 or 12, wherein:

A first association relationship exists between the second time unit and the first time unit set, and the first association relationship is the first time unit set configured or predefined by high-level signaling and the second time Semi-static correspondence between units; and / or

The second association relationship is a dynamic correspondence relationship between a physical downlink data channel indicated by a physical downlink control channel and the second time unit.
The method according to any one of claims 8 to 13, characterized in that:

The number of bits of the first codebook is determined according to the maximum number of candidate reception opportunities in the first candidate receiving opportunity subset that do not overlap in the time domain, and the number of bits of the second codebook is according to the second The maximum number of candidate receiving opportunities in the candidate receiving opportunity subset that do not overlap in the time domain is determined.
A communication device, comprising a processor and a transceiver, wherein:

The transceiver is configured to receive at least one physical downlink data channel at a candidate receiving opportunity in a first set of time units, where the first set of time units includes M candidate receiving opportunities, where M is an integer greater than 1, The M candidate receiving timings are divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information, wherein the codebook identification information includes the first codebook identification information and the second codebook Identification information, the first candidate receiving opportunity subset corresponds to the first codebook identification information, and the second candidate receiving opportunity subset corresponds to the second codebook identification information;

The processor is configured to generate a feedback information codebook according to a reception status of the at least one physical downlink data channel, the feedback information codebook includes a first codebook and a second codebook, and the first codebook and the The first candidate receiving opportunity subset corresponds, and the second codebook corresponds to the second candidate receiving opportunity subset;

The transceiver is further configured to send the first codebook and / or the second codebook in a second time unit.
The communication device according to claim 15, wherein:

Each of the M candidate receiving opportunities corresponds to a first parameter group, and the first parameter group includes codebook identification information and includes at least one of the following information: physical downlink data channel and physical downlink control Timing offset between channels, time domain location information of the physical downlink data channel, and physical downlink data channel mapping type; or,

Each of the M candidate receiving opportunities corresponds to a second parameter group, where the second parameter group includes a physical downlink data channel mapping type and includes at least one of the following information: physical downlink data channel and physical A timing offset between downlink control channels and time domain location information of a physical downlink data channel, wherein the codebook identification information corresponds to the physical downlink data channel mapping type; or,

Each of the M candidate receiving opportunities corresponds to a third parameter group, and the third parameter group includes time domain position information of a physical downlink data channel, and includes at least one of the following information: physical downlink data The timing offset between the channel and the physical downlink control channel, and the physical downlink data channel mapping type, where the codebook identification information corresponds to the time domain location information of the physical downlink data channel.
The communication device according to claim 16, wherein the codebook identification information corresponds to time-domain location information of the physical downlink data channel, and includes at least one of the following two correspondences:

The codebook identification information corresponds to a number of a start symbol of the physical downlink data channel; or,

The codebook identification information corresponds to a time domain length of the physical downlink data channel.
The communication device according to any one of claims 15 to 17, wherein the transceiver is specifically configured to:

The second candidate receiving opportunity subset has a second association relationship with the second time unit, and the second candidate receiving opportunity subset does not have the second association relationship with the second time unit. The second time unit sends the first codebook; or

The second candidate receiving opportunity subset does not have a second association relationship with the second time unit, and the second candidate receiving opportunity subset has the second association relationship with the second time unit. The second time unit sends the second codebook; or,

The second candidate receiving opportunity subset has a second association relationship with the second time unit, and the second candidate receiving opportunity subset has the second association relationship with the second time unit. The second time unit sends the first codebook and / or the second codebook.
The communication device according to claim 18, wherein the transceiver is specifically configured to:

When the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook do not overlap in the time domain in the second time unit, in the first physical Sending the first codebook on an uplink channel, and sending the second codebook on the second physical uplink channel; and / or

When the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in the time domain in the second time unit, the first physical uplink Sending the first codebook on a channel, or sending the second codebook on the second physical uplink channel.
The communication device according to claim 18 or 19, wherein

A first association relationship exists between the second time unit and the first time unit set, and the first association relationship is the first time unit set configured or predefined by high-level signaling and the second time Semi-static correspondence between units; and / or

The second association relationship is a dynamic correspondence relationship between a physical downlink data channel indicated by a physical downlink control channel and the second time unit.
The communication device according to any one of claims 15 to 20, wherein

The number of bits of the first codebook is determined according to the maximum number of candidate reception opportunities in the first candidate receiving opportunity subset that do not overlap in the time domain, and the number of bits of the second codebook is according to the second The maximum number of candidate receiving opportunities in the candidate receiving opportunity subset that do not overlap in the time domain is determined.
A communication device, comprising a transceiver, wherein:

The transceiver is configured to send at least one physical downlink data channel at a candidate receiving opportunity in a first set of time units, where the first set of time units includes M candidate receiving opportunities, where M is an integer greater than 1, The M candidate receiving timings are divided into a first candidate receiving timing subset and a second candidate receiving timing subset according to the codebook identification information, wherein the codebook identification information includes the first codebook identification information and the second codebook Identification information, the first candidate receiving opportunity subset corresponds to the first codebook identification information, and the second candidate receiving opportunity subset corresponds to the second codebook identification information;

The transceiver is further configured to receive a first codebook and / or a second codebook at a second time unit, the first codebook corresponding to the first subset of candidate reception opportunities, and the second codebook This corresponds to the second candidate reception timing subset.
The communication device according to claim 22, wherein:

Each of the M candidate receiving opportunities corresponds to a first parameter group, and the first parameter group includes codebook identification information and includes at least one of the following information: physical downlink data channel and physical downlink control Timing offset between channels, time domain location information of the physical downlink data channel, and physical downlink data channel mapping type; or,

Each of the M candidate receiving opportunities corresponds to a second parameter group, where the second parameter group includes a physical downlink data channel mapping type and includes at least one of the following information: physical downlink data channel and physical A timing offset between downlink control channels and time domain location information of a physical downlink data channel, wherein the codebook identification information corresponds to the physical downlink data channel mapping type; or,

Each of the M candidate receiving opportunities corresponds to a third parameter group, and the third parameter group includes time domain position information of a physical downlink data channel, and includes at least one of the following information: physical downlink data The timing offset between the channel and the physical downlink control channel, and the physical downlink data channel mapping type, where the codebook identification information corresponds to the time domain location information of the physical downlink data channel.
The communication device according to claim 23, wherein the codebook identification information corresponds to time domain location information of the physical downlink data channel, and includes at least one of the following two types of correspondence relationships:

The codebook identification information corresponds to a number of a start symbol of the physical downlink data channel; or,

The codebook identification information corresponds to a time domain length of the physical downlink data channel.
The communication device according to any one of claims 22 to 24, wherein the transceiver is specifically configured to:

The second candidate receiving opportunity subset has a second association relationship with the second time unit, and the second candidate receiving opportunity subset does not have the second association relationship with the second time unit. Said second time unit receiving said first codebook; or,

The second candidate receiving opportunity subset does not have a second association relationship with the second time unit, and the second candidate receiving opportunity subset has the second association relationship with the second time unit. Said second time unit receiving said second codebook; or,

The second candidate receiving opportunity subset has a second association relationship with the second time unit, and the second candidate receiving opportunity subset has the second association relationship with the second time unit. The second time unit receives the first codebook and / or the second codebook.
The communication device according to claim 25, wherein the transceiver is specifically configured to:

When the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook do not overlap in the time domain in the second time unit, in the first physical Receiving the first codebook on an uplink channel, and receiving the second codebook on the second physical uplink channel; and / or,

When the first physical uplink channel carrying the first codebook and the second physical uplink channel carrying the second codebook overlap in the time domain in the second time unit, the first physical uplink Receiving the first codebook on a channel, or receiving the second codebook on the second physical uplink channel.
The communication device according to claim 25 or 26, wherein

A first association relationship exists between the second time unit and the first time unit set, and the first association relationship is the first time unit set configured or predefined by high-level signaling and the second time Semi-static correspondence between units; and / or

The second association relationship is a dynamic correspondence relationship between a physical downlink data channel indicated by a physical downlink control channel and the second time unit.
The communication device according to any one of claims 22 to 27, wherein

The number of bits of the first codebook is determined according to the maximum number of candidate reception opportunities in the first candidate receiving opportunity subset that do not overlap in the time domain, and the number of bits of the second codebook is according to the second The maximum number of candidate receiving opportunities in the candidate receiving opportunity subset that do not overlap in the time domain is determined.
A communication device, comprising a processor, and the processor and the memory are coupled to support the communication device to execute the method according to any one of claims 1 to 7.
A communication device, comprising a processor, the processor and a transceiver are coupled to support the communication device to execute the method according to any one of claims 8 to 14.
A computer-readable storage medium, comprising instructions that, when run on a computer, causes the computer to perform the method according to any one of claims 1 to 7.
A computer-readable storage medium, comprising instructions that, when run on a computer, causes the computer to perform the method according to any one of claims 8 to 14.
A computer program product containing instructions, which, when run on a computer, causes the computer to perform the method according to any one of claims 1 to 7.
A computer program product containing instructions, which, when run on a computer, causes the computer to perform the method according to any one of claims 8 to 14.
A communication system is characterized in that it includes a terminal device and a network device, and the terminal device cooperates with the network device to execute the method according to any one of claims 1 to 14.