WO2020164503A1

WO2020164503A1 - Information transmission method, terminal device and network device

Info

Publication number: WO2020164503A1
Application number: PCT/CN2020/074826
Authority: WO
Inventors: 贾琼; 张佳胤; 吴霁
Original assignee: 华为技术有限公司
Priority date: 2019-02-14
Filing date: 2020-02-12
Publication date: 2020-08-20
Also published as: CN111565093B; CN111565093A

Abstract

Provided in the embodiments of the present application are an information transmission method, a terminal device and a network device. The method comprises: a terminal device generating first information, wherein the first information comprises at least one piece of first sub-information and second sub-information, the at least one piece of first sub-information is used for indicating a downlink transmission and receiving condition of at least one time unit in at least one first time unit set; and the second sub-information is used for indicating a downlink transmission and receiving condition of at least one time unit in a second time unit set, and the downlink transmission and receiving condition of the at least one time unit in each first time unit set is not successfully transmitted to a network device; and after channel interception is successful, the terminal device sending the first information to the network device on a second time unit. The information transmission method, the terminal device and the network device provided in the embodiments of the present application are used for solving the technical problem of how the terminal device sends HARQ-ACK information, unsuccessfully fed back to the network device due to LBT failure, of downlink transmission.

Description

Information transmission method, terminal equipment and network equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910116644X, and the application name is "information transmission methods, terminal equipment, and network equipment" on February 14, 2019. The entire content is incorporated herein by reference. Applying.

Technical field

The embodiments of the application relate to communication technologies, and in particular, to an information transmission method, terminal equipment, and network equipment.

Background technique

With the rapid development of wireless communication technology, spectrum resources are increasingly scarce. In order to solve the problem of less available frequency domain resources for licensed spectrum, a new radio (NR) mobile communication system (abbreviated as: NR system) may not rely on the assistance of licensed spectrum and completely work on unlicensed spectrum. That is, the network device sends downlink transmission (for example, control information, service data) on the unlicensed spectrum, and the terminal device sends uplink transmission (for example, control information, service data) on the unlicensed spectrum. The above-mentioned NR system working in the unlicensed spectrum may be referred to as an unlicensed new radio-unlicensed (NR-U) system.

In order to share unlicensed spectrum with other systems (such as communication systems of different operators, Wi-Fi networks, etc.), the sending equipment in NR-U adopts the channel access mechanism of listen before talk (LBT) Use channel resources of unlicensed spectrum. When the channel is determined to be idle through listening (that is, when the channel listening is successful or the LBT is successful), the sending device can obtain the channel usage right and at the same time obtain the corresponding channel occupancy time (COT).

At present, in the NR system, the terminal device needs to perform HARQ feedback on the downlink transmission through the physical uplink control channel (PUCCH) at the time indicated by the network device. However, in the NR-U system, the terminal device needs to perform LBT before sending the PUCCH. Due to the uncertainty of LBT, the terminal device may not be able to perform HARQ feedback at the time indicated by the network device, which affects downlink transmission.

Summary of the invention

The embodiments of the present application provide an information transmission method, terminal equipment, and network equipment, which are used to solve the technical problem of how the terminal equipment sends HARQ-ACK information that is not successfully fed back to the network equipment for downlink transmission due to LBT failure.

In the first aspect, an embodiment of the present application provides an information transmission method. In this method, a terminal device can generate first information. The first information includes: at least one first sub-information and a second sub-information. A first sub-information is used to indicate the downlink transmission and reception status of at least one time unit in at least one first time unit set; the second sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the second time unit set , The downlink transmission and reception status of at least one time unit in each of the first time unit set is not successfully transmitted to the network device; the terminal device sends to the network device on the second time unit after successful channel listening The first information.

As a possible implementation manner, the at least one first sub-information is at least one first HARQ-ACK codebook, and/or the second sub-information is a second HARQ-ACK codebook.

As a possible implementation manner, the unsuccessful transmission of the downlink transmission and reception status of at least one time unit in the first time unit set to the network device includes: the terminal device fails to be in the first time unit due to channel listening failure Send to the network device the downlink transmission and reception status of at least one time unit in the first time unit set, where the first time unit is at least one of the first time unit set scheduled by the network device for transmission The time unit of the downlink transmission and reception status of the time unit; or, the network device failed to parse the downlink transmission and reception status of at least one time unit in the first time unit set from the terminal device; or, the network device Indicate a delay in feeding back downlink transmission and reception conditions on at least one time unit in the first time unit set.

In the method provided in this embodiment, the terminal device expands the semi-static HARQ-ACK codebook. After the LBT is successfully executed before the time unit scheduled by the network device for HARQ feedback, the terminal device can transfer the downlink that includes the current required feedback. The transmitted HARQ-ACK information, including the first information of the downlink transmission HARQ-ACK information that was not successfully transmitted to the network device in the past, is sent to the network device, so that the network device can timely know the downlink that was not successfully transmitted to the network device in the past The transmitted HARQ-ACK information ensures the performance of downlink transmission.

As a possible implementation manner, the terminal device can implement the first information to carry the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past in the following two ways, specifically:

The first way: the terminal device carries the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past in the first information based on the instruction of the network device.

In this implementation manner, the method further includes: the terminal device receives second information from the network device, and the second information includes at least one of the following: first indication information, the at least one first The total number of sub-information and the second sub-information, and the information of the second time unit; wherein, the first indication information is used to instruct the terminal device to carry the at least one first information in the first information The downlink transmission and reception status of at least one time unit in a time unit set.

In this embodiment, the network device can display or implicitly instruct the terminal device to re-feed back on the subsequent time unit the reception of the downlink transmission that was not successfully transmitted to the network device through the above second information, so that the terminal device can It is necessary to take the union of the time unit corresponding to the current moment and the time unit that has not been successfully fed back in the past and then feed back together. In this way, the alignment of the HARQ-ACK codebook between the network device and the terminal device can be effectively ensured, and the problem that the HARQ process cannot be released due to the HARQ-ACK feedback cannot be transmitted in time due to the HARQ process has been occupied and ultimately improved system performance.

The second way: the terminal device autonomously carries in the first information the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past.

In this implementation manner, the first information further includes: third sub-information, and the third sub-information includes at least one of the following: second indication information, the at least one first sub-information, and the second The total number of sub-information, the identification of the hybrid automatic repeat request process corresponding to the downlink transmission of at least one time unit in the at least one first time unit set; wherein, the second indication information is used to indicate the first information It carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.

In this embodiment, the terminal device can independently feed back the time unit corresponding to the current moment and the time unit that has not been successfully fed back in the past, and then indicate the terminal device to the network device through the third sub-information. The first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set. In this way, the alignment of the HARQ-ACK codebook between the network device and the terminal device can be effectively ensured, and the problem that the HARQ process cannot be released because the HARQ-ACK feedback cannot be transmitted in time due to the HARQ-ACK feedback is always occupied, and finally the system performance is improved.

As a possible implementation manner, the network device instructs to delay the feedback of the downlink transmission and reception situation on at least one time unit in the at least one first time unit set. In this scenario, the method further includes: the terminal device determines, according to the processing capability of the terminal device, at least one time unit in the at least one first time unit set for which downlink transmission reception conditions are to be fed back. Wherein, the first time unit and the second time unit belong to different channel occupation times, or belong to the same channel occupation time.

In the method provided in this embodiment, when the network device indicates the HARQ feedback delay, the terminal device can dynamically extend the semi-static HARQ-ACK based on its processing capability, which can effectively ensure how the HARQ-ACK codebook is aligned between the network device and the terminal device This avoids the problem that the HARQ process cannot be released due to the HARQ-ACK feedback cannot be transmitted in time, and the HARQ process has been occupied and cannot be released, ultimately improving system performance.

In a second aspect, an embodiment of the present application provides an information transmission method. In the method, a network device receives first information from a terminal device on a second time unit, and the first information includes: at least one first sub-information, Second sub-information, the at least one first sub-information is used to indicate the downlink transmission and reception status of at least one time unit in at least one first time unit set; the second sub-information is used to indicate at least one time unit in the second time unit set The downlink transmission and reception status of one time unit, the downlink transmission and reception status of at least one time unit in each first time unit set is not successfully transmitted to the network device; the network device obtains the at least one according to the first information The downlink transmission and reception status of at least one time unit in a first time unit set, and the downlink transmission and reception status of at least one time unit in the second time unit set.

When the terminal device carries the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past based on the instruction of the network device, the method may further include: the network device sends the first information to the terminal device. Second information, the second information includes at least one of the following: first indication information, the total number of the at least one first sub-information and the second sub-information, and the information of the second time unit; wherein, The first indication information is used to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information.

When the terminal device autonomously carries in the first information the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past, the first information may further include: third sub-information, and the third sub-information includes the following The at least one item: the second indication information, the total number of the at least one first sub-information and the second sub-information, the hybrid automatic corresponding to the downlink transmission of at least one time unit in the at least one first time unit set An identifier of the retransmission request process; wherein the second indication information is used to indicate that the first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.

As a possible implementation, when the network device instructs to delay the feedback of the downlink transmission and reception on at least one time unit in the at least one first time unit set, the method may further include: the network device according to The processing capability of the terminal device determines at least one time unit in the at least one first time unit set corresponding to the downlink transmission reception situation indicated in the first sub-information. Wherein, the first time unit and the second time unit belong to different channel occupation times, or belong to the same channel occupation time.

The beneficial effects of the information transmission methods provided by the foregoing second aspect and each possible implementation manner of the second aspect can be referred to the beneficial effects brought about by the foregoing first aspect and each possible implementation manner. Add more details.

In a third aspect, an embodiment of the present application provides a terminal device, the terminal device includes: a processing module and a sending module; wherein the processing module is configured to generate first information, and the first information includes: at least one first child Information, second sub-information, the at least one first sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the at least one first time unit set; the second sub-information is used to indicate the second time unit set The downlink transmission and reception status of at least one time unit in each of the first time unit sets are not successfully transmitted to the network device; the sending module is used to perform the Sending the first information to the network device in a second time unit.

When the terminal device carries the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past based on the instruction of the network device, the terminal device may further include: a receiving module, configured to receive The second information of the device, where the second information includes at least one of the following: first indication information, the total number of the at least one first sub-information and the second sub-information, and the information of the second time unit ; Wherein, the first indication information is used to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information.

When the terminal device autonomously carries in the first information the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past, the first information further includes: third sub-information, and the third sub-information includes the following At least one item: second indication information, the total number of the at least one first sub-information and the second sub-information, and the hybrid automatic repeater corresponding to the downlink transmission of at least one time unit in the at least one first time unit set Transmission request process identifier; wherein the second indication information is used to indicate that the first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.

As a possible implementation manner, the network device instructs to delay the feedback of the downlink transmission and reception situation on at least one time unit in the at least one first time unit set. In this scenario, the processing module is further configured to determine, according to the processing capability of the terminal device, at least one time unit in the at least one first time unit set to be fed back on the downlink transmission reception situation. Wherein, the first time unit and the second time unit belong to different channel occupation times, or belong to the same channel occupation time.

The beneficial effects of the terminal equipment provided by the foregoing third aspect and each possible implementation manner of the third aspect can be referred to the beneficial effects brought about by the foregoing first aspect and each possible implementation manner of the first aspect, which will not be added here. Repeat.

In a fourth aspect, an embodiment of the present application provides a network device. The network device includes a receiving module and a processing module. Wherein, the receiving module is configured to receive the first information from the terminal device on the second time unit, the first information includes: at least one first sub-information and second sub-information, and the at least one first sub-information is used for To indicate the downlink transmission and reception status of at least one time unit in at least one first time unit set; the second sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the second time unit set, each of the first time unit sets The downlink transmission and reception status of at least one time unit in a time unit set is not successfully transmitted to the network device; the processing module is configured to obtain the downlink transmission of at least one time unit in the at least one first time unit set according to the first information Transmission and reception status, and downlink transmission and reception status of at least one time unit in the second time unit set.

When the terminal device carries the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past based on the instruction of the network device, the network device further includes: a sending module for sending to the terminal device Second information, the second information includes at least one of the following: first indication information, the total number of the at least one first sub-information and the second sub-information, and the information of the second time unit; wherein The first indication information is used to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information.

As a possible implementation manner, when the network device instructs to delay the feedback of the downlink transmission and reception situation on at least one time unit in the at least one first time unit set, the processing module is further configured to respond according to the terminal The processing capability of the device determines at least one time unit in the at least one first time unit set corresponding to the downlink transmission reception situation indicated in the first sub-information. Wherein, the first time unit and the second time unit belong to different channel occupation times, or belong to the same channel occupation time.

For the beneficial effects of the network equipment provided by the above-mentioned fourth aspect and the possible implementation manners of the fourth aspect, please refer to the beneficial effects brought by the above-mentioned first aspect and the first aspect, which will not be added here. Repeat.

In a fifth aspect, an embodiment of the present application provides a terminal device. The terminal device includes: a processor, a memory, a receiver, and a transmitter; both the receiver and the transmitter are coupled to the processor, and the The processor controls the receiving action of the receiver, and the processor controls the sending action of the transmitter;

The memory is used to store computer executable program code, and the program code includes instructions; when the processor executes the instructions, the instructions cause the terminal device to execute the method provided in the first aspect or each possible implementation manner of the first aspect.

In a sixth aspect, an embodiment of the present application provides a network device. The network device includes: a processor, a memory, a receiver, and a transmitter; the receiver and the transmitter are both coupled to the processor, and the The processor controls the receiving action of the receiver, and the processor controls the sending action of the transmitter;

The memory is used to store computer executable program code, and the program code includes instructions; when the processor executes the instructions, the instructions cause the network device to execute the method provided in the second aspect or each possible implementation manner of the second aspect.

In a seventh aspect, an embodiment of the present application provides a communication device, which includes a unit, module, or circuit for executing the method provided in the foregoing first aspect or each possible implementation manner of the first aspect. The communication device may be a terminal device or a module applied to the terminal device, for example, it may be a chip applied to the terminal device.

In an eighth aspect, an embodiment of the present application provides a communication device, which includes a unit, module, or circuit for executing the method provided in the foregoing second aspect or each possible implementation manner of the second aspect. The communication device may be a network device or a module applied to the network device, for example, it may be a chip applied to the network device.

In a ninth aspect, the embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the foregoing first aspect or the methods in the various possible implementations of the first aspect.

In a tenth aspect, an embodiment of the present application provides a computer program product containing instructions, which when run on a computer, enables the computer to execute the foregoing second aspect or the methods in the various possible implementation manners of the second aspect.

In an eleventh aspect, an embodiment of the present application provides a computer-readable storage medium having instructions stored in the computer-readable storage medium, which when run on a computer, cause the computer to execute the first aspect or the first aspect described above. Methods in various possible implementations.

In a twelfth aspect, an embodiment of the present application provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the above-mentioned second aspect or the second aspect Methods in various possible implementations.

In a thirteenth aspect, an embodiment of the present application provides a communication device with a computer program stored on the communication device, and when the computer program is executed by the communication device, the first aspect or various aspects of the first aspect are implemented. Methods in possible implementations. The communication device mentioned here may be, for example, a chip.

In a fourteenth aspect, an embodiment of the present application provides a communication device with a computer program stored on the communication device, and when the computer program is executed by the communication device, the second aspect or various aspects of the second aspect are implemented. Methods in possible implementations. The communication device mentioned here may be, for example, a chip.

In a fifteenth aspect, a communication device is provided. The communication device may be a terminal device in the foregoing third aspect or various possible implementations of the third aspect, or a chip set in the terminal device. The communication device includes a processor, which is coupled to a memory and can be used to execute instructions in the memory to implement the foregoing first aspect or the methods in various possible implementation manners of the first aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

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

When the communication device is a chip set in a terminal device, the communication interface may be an input/output interface.

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

In a sixteenth aspect, a communication device is provided. The communication device may be a network device in the foregoing fourth aspect or various possible implementations of the fourth aspect, or a chip set in the network device. The communication device includes a processor, which is coupled with a memory and can be used to execute instructions in the memory to implement the foregoing second aspect or methods in various possible implementation manners of the second aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

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

When the communication device is a chip set in a network device, the communication interface may be an input/output interface.

In a seventeenth aspect, an embodiment of the present application provides a communication system, including: a network device and a terminal device. The terminal device is used to execute the foregoing first aspect or methods in various possible implementation manners of the first aspect. The network device is used to execute the foregoing second aspect or methods in various possible implementation manners of the second aspect.

In an eighteenth aspect, an embodiment of the present application provides a chip, which is connected to a memory, and is used to read and execute a software program stored in the memory to implement any one of the first aspect to the second aspect Or a method provided by any possible implementation of any aspect.

In a nineteenth aspect, an embodiment of the present application provides a chip that includes a processor and a memory, and the processor is configured to read a software program stored in the memory to implement the first to second aspects. A method provided by any aspect or any possible implementation of any aspect.

The information transmission method, terminal equipment, and network equipment provided in the embodiments of this application. The terminal equipment extends the semi-static HARQ-ACK codebook and executes LBT successfully before the time unit scheduled by the network equipment for HARQ feedback. Send the first information including the HARQ-ACK information of the downlink transmission that is currently required to be fed back and the first information including the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past, so that the network device can learn in time The HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past ensures the performance of the downlink transmission.

Description of the drawings

FIG. 1 is a schematic diagram of the architecture of a mobile communication system applied in an embodiment of the present application;

2 is a schematic flowchart of an information transmission method provided by an embodiment of this application;

FIG. 3 is a schematic diagram 1 of a time domain resource provided by an embodiment of this application;

FIG. 4 is a second schematic diagram of a time domain resource provided by an embodiment of this application;

FIG. 5 is a third schematic diagram of a time domain resource provided by an embodiment of this application;

FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of this application;

FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of another terminal device provided by an embodiment of this application;

FIG. 9 is a schematic structural diagram of another network device provided by an embodiment of this application.

detailed description

FIG. 1 is a schematic diagram of the architecture of a mobile communication system applied in an embodiment of the present application. As shown in Fig. 1, the mobile communication system may include a core network device 110, a wireless access network device 120 and at least one terminal device (the terminal device 130 and the terminal device 140 in Fig. 1). The terminal device is connected to the wireless access network device 120 in a wireless manner, and the wireless access network device 120 is connected to the core network device 110 in a wireless or wired manner. The core network device 110 and the radio access network device 120 can be separate and different physical devices, or the functions of the core network device 110 and the logical functions of the radio access network device 120 can be integrated on the same physical device. It is a physical device that integrates part of the functions of the core network device 110 and part of the wireless access network device 120. The terminal device can be a fixed location or movable. FIG. 1 is only a schematic diagram. The mobile communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1. This embodiment of the application does not limit the number of core network equipment 110, radio access network equipment 120, and terminal equipment included in the mobile communication system.

The radio access network device 120 is an access device for terminal devices to access the mobile communication system in a wireless manner. It can be a base station NodeB, an evolved base station eNodeB, a 5G mobile communication system, or a new generation of radio (NR) communication. For the base station in the system, the base station in the future mobile communication system, the access node in the WiFi system, etc., the embodiment of the present application does not limit the specific technology and specific device form adopted by the wireless access network device 120. In the embodiment of the present application, the wireless access network device 120 is referred to as the network device. If there is no special description, in the embodiment of the present application, the network device refers to the wireless access network device 120. In addition, in the embodiments of the present application, the terms 5G and NR may be equivalent.

A terminal device may also be called a terminal, a user equipment (UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT), and so on. Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial control) ), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, wireless terminals in smart grid, and wireless terminals in transportation safety (transportation safety) Terminal, wireless terminal in smart city, wireless terminal in smart home, etc.

The wireless access network device 120 and terminal devices can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airplanes, balloons, and satellites in the air. The embodiment of the present application does not limit the application scenarios of the wireless access network device 120 and the terminal device.

The wireless access network device 120 and the terminal device may communicate through a licensed spectrum, or communicate through an unlicensed spectrum, or communicate through a licensed spectrum and an unlicensed spectrum at the same time. The wireless access network device 120 and the terminal device can communicate through a spectrum below 6 gigahertz (gigahertz, GHz), or communicate through a spectrum above 6 GHz, and can also use a spectrum below 6 GHz and a spectrum above 6 GHz. To communicate. The embodiment of the present application does not limit the spectrum resource used between the radio access network device 120 and the terminal device. The embodiments of the present application may be applicable to downlink transmission. For downlink transmission, the sending device is a wireless access network device, and the corresponding receiving device is a terminal device.

In order to facilitate the understanding of the embodiments of the present application, several definitions are introduced and explained first. specifically:

Hybrid automatic repeat request (HARQ): It is a technology that combines forward error correction (FEC) and automatic repeat request (ARQ). Redundancy information can be added to the transmitted data through FEC. After receiving the data, the terminal device can use an error detection code, such as cyclic redundancy check (CRC), to detect whether the received data is wrong. At the same time, the terminal device can correct some errors through redundant information in the data during the detection process to reduce the number of data retransmissions. If the terminal device detects that the data is correct (that is, the CRC check is successful), the terminal device can send an affirmative acknowledgement (ACK) to the network device to notify the network device that the data is received correctly. If the terminal device detects a data error (that is, the CRC check fails), that is, an error that cannot be corrected by FEC, the terminal device can request the network device to resend the data through the ARQ mechanism. Specifically, the terminal device may send a negative acknowledgment (NACK) to the network device to notify the data reception failure. After receiving the NACK of the data, the network device will resend the data. Among them, the aforementioned ACK and NACK can be collectively referred to as HARQ-ACK information. In some embodiments, HARQ-ACK information may also be referred to as HARQ information, which is not distinguished and limited in the embodiments of the present application.

The physical uplink control channel (PUCCH) is used to carry uplink control information (for example, HARQ-ACK information).

The physical downlink shared channel (PDSCH) is used to carry downlink transmission.

Physical downlink control channel (physical downlink control channel, PDCCH), used to carry downlink control information (downlink control information, DCI).

Taking the above-mentioned mobile communication system shown in Figure 1 as an NR mobile communication system (abbreviated as: NR system) as an example, the NR system uses HARQ technology to automatically retransmit and merge and decode data with transmission errors to ensure reliable data transmission Sex. For downlink transmission, the network device can instruct the terminal device when to perform HARQ feedback. That is, when to feed back the reception status of the downlink transmission (HARQ-ACK information). specifically:

If the terminal device receives a dynamically scheduled PDSCH or a semi-persistent PDSCH in slot n-k, the terminal device needs to perform HARQ feedback on the PDSCH in slot n. The value of k may be indicated by the PDSCH-to-HARQ-timing-indicator field in the DCI, and the corresponding value range of k may be {1,2,3,4,5,6,7,8}. Or, the value of k is determined by the dl-DataToUL-ACK field included in high-level signaling (for example, RRC signaling). It is understandable that the letter k here is only used for illustration and does not constitute a limitation. In some embodiments, it may be expressed in other ways. For example, in the 3GPP protocol 38.213, K_1 is used to indicate, at this time, the meanings of K_1 and k are equivalent.

Taking the value of k indicated by the DCI as an example, since the value of k indicated by the DCI of different time slots may be different, the DCI received by the terminal equipment at different times may point to the same time slot. That is, the terminal device needs to feed back HARQ-ACK information of downlink transmissions located in different time slots on the same PUCCH.

Exemplarily, a network device sends DCI1 to the terminal device in slot 1, and sends PDSCH1 to the terminal device in slot 1, sends DCI2 to the terminal device in slot 2, and sends PDSCH2 to the terminal device in slot 2, as an example. If the indicated value of k is 3 and the value of k indicated by DCI2 is 2, the terminal device needs to perform HARQ feedback on PDSCH1 received on slot1 on slot4, and HARQ feedback on PDSCH2 received on slot2 . In this example, the terminal device needs to feed back the HARQ-ACK information of two PDSCHs in slot4, that is, on one PUCCH, the terminal device needs to feed back the HARQ-ACK information of PDSCH1 transmitted on slot 1 and PDSCH2 transmitted on slot 2. HARQ-ACK information.

The set of all downlink transmission HARQ-ACK information transmitted by the terminal device on a PUCCH is called the HARQ-ACK codebook (HARQ-ACK codebook). In R15, two types of HARQ-ACK codebooks are supported. One is a semi-static HARQ-ACK codebook (semi-static HARQ-ACK codebook), and the other is a dynamic HARQ-ACK codebook (dynamic HARQ-ACK codebook).

For the semi-static HARQ-ACK codebook, in the PUCCH on slot n, the terminal device needs to feedback all possible PDSCH transmissions on slot n-k, k∈K, where K is a set, corresponding to the value range of k. As mentioned above, the value range of k can be preset {1,2,3,4,5,6,7,8}, or indicated by DCI, or indicated by high-level signaling. In actual transmission, if transmission is not scheduled on a corresponding slot n-k, the terminal device feeds back NACK. On the contrary, if the downlink transmission is scheduled in a certain slot n-k, the terminal device will feed back ACK or NACK according to the actual reception situation. That is, the semi-static HARQ-ACK codebook is used to indicate the reception conditions of downlink transmissions that may exist on each time slot in a time slot set. That is to say, when the DCI received by the terminal equipment at different times points to the same time slot, the terminal equipment can use the semi-static HARQ-ACK codebook to feed back the reception situation of downlink transmissions that may exist at the multiple times .

Exemplarily, taking the size of the K set of 3 as an example, that is, in the PUCCH on slot n, the terminal device needs to perform all possible PDSCHs on slot n-1, slot n-2, and slot n-3. Feedback. Assume whether there is PDSCH in each slot, and the reception of PDSCH is shown in Table 1 below:

Table 1

时隙Time slot	是否有PDSCHIs there a PDSCH	PDSCH接收情况PDSCH reception	是否有DCIIs there DCI	DCI所指示的k的值The value of k indicated by DCI
slot n-3slot n-3	是Yes	ACKACK	有Have	33
slot n-2slot n-2	否no	无no	无no	--
slot n-1slot n-1	是Yes	NACKNACK	有Have	11

Taking 1 for ACK and 0 for NACK as an example, the semi-static HARQ-ACK codebook carried in the PUCCH on slot n may be 100.

However, with the rapid development of wireless communication technology, spectrum resources are increasingly scarce. In order to solve the problem of less available frequency domain resources of the licensed spectrum, the NR system can work completely on the unlicensed spectrum without relying on the assistance of the licensed spectrum. That is, the network device sends downlink transmission (for example, control information and/or service data) on the unlicensed spectrum, and the terminal device sends uplink transmission (for example, control information and/or service data) on the unlicensed spectrum. In the embodiments of the present application, the above-mentioned NR system working in an unlicensed spectrum may be referred to as an unlicensed new radio-unlicensed (NR-U) system.

In order to share the unlicensed spectrum with other systems (such as communication systems of different operators, Wi-Fi networks, etc.), the transmitting equipment in the NR-U system adopts listen before talk (LBT) channel access The mechanism uses channel resources of unlicensed spectrum. specifically:

The sending device performs channel sensing on the channel before sending the transmission. When the channel is determined to be idle through listening (that is, when the channel listening is successful or the LBT is successful), the sending device can obtain the channel usage right and at the same time obtain the corresponding channel occupancy time (COT). In the COT, the sending device can directly access the channel or access the channel through the fast LBT mechanism to send control information and/or service data. When it is determined through listening that the channel is busy (that is, the channel listening fails or the LBT fails), the sending device gives up sending control information and/or service data to the receiving device on the channel. It can be understood that the sending device mentioned here may be a network device or a terminal device. Specifically, if the device that initiates LBT is a network device, the sending device is a network device and the receiving device is a terminal device; if the device that initiates LBT is a terminal device, the sending device is a terminal device and the receiving device is a network device.

Currently, there are the following two types of channel listening:

The first type of channel listening is a long listening type of channel listening, that is, when the sending device performs the first type of channel listening, it takes a long time from the beginning of the channel listening to the channel listening to the power consumption. In some embodiments, the first type of channel sensing may also be referred to as type 1 channel access. At present, the common first type of channel listening includes clear channel assessment (CCA) based on random backoff.

The process for the sending device to execute CCA based on random backoff can be as follows: the sending device can generate a backoff counter N uniformly and randomly from 0 to the initial contention window size (CWS), and use the listening time slot (for example, the duration 9μs) for the granularity of channel sensing.

If the sending device detects that the channel is idle in the listening time slot, it will decrement the backoff counter by 1. If the sending device detects that the channel is busy in the listening time slot, it will suspend the back-off counter without decrementing it by 1. That is, the value of the backoff counter remains unchanged during the busy time of the channel, and the backoff counter is counted down again when the channel is detected to be idle. In specific implementation, the transmitting device can compare the power on the channel received in the listening time slot with the energy detection threshold (CCA-energy detection, CCA-ED). If the power on the channel is higher than or equal to CCA-ED, it is determined that the channel is busy, and if the power on the channel is lower than CCA-ED, it is determined that the channel is idle.

When the backoff counter is reset to zero, the sending device can determine that the channel listening is successful (it can also be referred to as LBT listening success). In this scenario, the sending device can immediately occupy the channel to send control information and/or service data. In some embodiments, the sending device may also wait for a period of time after the backoff counter is reset to zero. After the waiting is over, the sending device can use an additional time slot (for example, 9 μs or 25 μs+9*k μs, where k is zero or a positive integer) to listen to the channel once. If the sending device detects that the channel is idle in the additional time slot, the sending device can determine that the channel detection is successful. In this scenario, the sending device can immediately occupy the channel to send control information and/or service data.

If the sending device does not complete the back-off counter reset to zero before the time-domain resource that it wants to occupy, or completes the back-off counter reset to zero before the time-domain resource that it wants to occupy, but listens in this additional listening slot If the channel is busy, the sending device can determine that the channel listening fails (also called LBT listening failure). At this time, the sending device gives up sending control information and/or service data on the channel.

The second type of channel sensing is a short-listing type of channel sensing, that is, when the transmitting device performs the second type of channel sensing, the time from the beginning of channel sensing to channel sensing becomes short. In some embodiments, the second type of channel listening may also be referred to as type 2 channel access. At present, the common type 2 channel monitoring includes single-slot CCA. In some embodiments, a single-slot CCA is also referred to as one-shot CCA or 25 μs CCA.

The process for the sending device to execute the single-slot CCA may be: the sending device performs a single-slot listening on the channel with a length of a preset time length (for example, 25 μs). If the sending device detects that the channel is idle in the single time slot, the sending device determines that the channel listening is successful. In this scenario, the sending device can immediately occupy the channel to send control information and/or service data. If the sending device detects that the channel is busy in the single time slot, the sending device determines that the channel listening fails. In this scenario, the sending device gives up sending control information and/or service data on the channel. During specific implementation, the transmitting device can compare the power on the channel received in the single time slot with CCA-ED. If the power on the channel is higher than or equal to CCA-ED, it is determined that the channel is busy, and if the power on the channel is lower than CCA-ED, it is determined that the channel is idle.

It can be understood that the second type of channel sensing can also be other channel sensing that can quickly listen to channels, and there is no restriction here. In addition, the listening duration of the second type of channel listening is not limited to 25μs, it can also be more or less time length, the number of second type of channel listening is not limited to 1, but also can be 2 times, 3. Times or more, there is no specific limitation here.

In different embodiments, the channel occupancy time COT obtained by the sending device may be less than or equal to the maximum channel occupancy time (MCOT). It can also be said that the channel occupation time COT obtained by the transmitting device can be any time period less than or equal to MCOT.

It can be understood that when the sending device is a network device, the transmission within the corresponding channel occupation time period is a downlink transmission; when the sending device is a terminal device, the transmission within the corresponding channel occupation time period is an uplink transmission. Optionally, the sending device may share the channel use right within the obtained channel occupation time period with other devices. For example, when the sending device is a network device, the network device can share the channel use right to the terminal device for use, that is, allow the terminal device to transmit within the channel occupation time. That is to say, in some embodiments, there will be switching between uplink transmission and downlink transmission within a certain channel occupation time.

As mentioned above, in the NR system, the terminal device needs to perform HARQ feedback on the downlink transmission at the time indicated by the network device. However, in the NR-U system, the terminal device needs to perform LBT before sending the PUCCH. Due to the uncertainty of LBT, the terminal device may not be able to perform HARQ feedback at the time indicated by the network device, which affects downlink transmission.

The embodiment of the application provides an information transmission method. When the NR-U system adopts the semi-static HARQ-ACK codebook method for HARQ feedback, the terminal device can dynamically expand the semi-static HARQ-ACK codebook to reduce the past The HARQ-ACK information of the downlink transmission that is successfully transmitted to the network device (for example, the unsuccessful feedback due to LBT failure) is carried in the current PUCCH and fed back together, so that the network device can learn the HARQ-ACK information of the downlink transmission that was not successfully fed back before. This avoids the problem that HARQ-ACK feedback cannot be transmitted in time and the HARQ process has been occupied and cannot be released, which can improve the performance of system downlink transmission.

It should be understood that the methods provided by the embodiments of this application include but are not limited to the aforementioned NR-U system, and can also be applied to other mobile communication systems, as long as there is an entity in the mobile communication system that needs to send data, and send the data Corresponding to the indication information of HARQ feedback, another entity needs to confirm according to the indication information and send HARQ feedback information. That is, it can be applied to any mobile communication system that requires HARQ feedback. For example, mobile communication systems that work on licensed spectrum (such as NR systems), mobile communication systems that rely on the assistance of licensed spectrum (such as LTE-A systems, LAA systems, etc.), and other mobile communication systems that work entirely on unlicensed spectrum ( Such as LTE-U system, Wi-Fi network, etc.).

The technical solutions of the embodiments of the present application will be described in detail below in conjunction with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

Before introducing the embodiments of the present application, two concepts involved in the embodiments of the present application will be explained. specifically:

First time unit: The first time unit is an uplink time unit, and the uplink time unit is a time unit scheduled by the network device for transmitting the downlink transmission and reception status of at least one time unit in the first "time unit set". That is, the first time unit is any resource scheduled by the network device that is independent of the first "time unit set", and this resource can be used to send the downlink transmission and reception status of at least one time unit in the first "time unit set" . It should be understood that the first “time unit set” mentioned here may be a time unit set corresponding to a semi-static HARQ-ACK codebook. In some embodiments, the first “time unit set” may be a semi-static HARQ-ACK codebook. The set of occurrences corresponding to the ACK codebook. For example, the first time unit is slot n, and the first "time unit set" is slot{n-8,n-7,n-6,n-5,n-4,n-3,n-2,n- 1}.

Second time unit: The second time unit is an uplink time unit, and the uplink time unit is a time unit scheduled by the network device for transmitting the downlink transmission and reception status of at least one time unit in the second "time unit set". That is, the second time unit is any resource that is independent of the second "time unit set" scheduled by the network device, and this resource can be used to send the downlink transmission and reception status of at least one time unit in the second "time unit set" . It should be understood that the second “time unit set” mentioned here may be a set of time units corresponding to a semi-static HARQ-ACK codebook. In some embodiments, the second “time unit set” may be a semi-static HARQ-ACK. The set of occurrences corresponding to the codebook.

FIG. 2 is a schematic flowchart of an information transmission method provided by an embodiment of the application. As shown in Figure 2, the method includes:

S101. The terminal device generates first information.

Wherein, the first information includes: at least one first sub-information and second sub-information, and the at least one first sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the at least one first time unit set; The second sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the second time unit set, and the downlink transmission and reception status of at least one time unit in each first time unit set is not successfully transmitted to the network device .

S102: After the channel listening succeeds, the terminal device sends the first information to the network device in a second time unit.

In a possible implementation manner, after receiving the first information, the network device obtains the downlink transmission and reception status of at least one time unit in the at least one first time unit set according to the first information, and The downlink transmission and reception situation of at least one time unit in the second time unit set.

In the embodiment of the present application, when the network device schedules the terminal device to perform HARQ feedback on the PUCCH on the second time unit, the terminal device may generate first information including at least one first sub-information and one second sub-information. The second sub-information is used to indicate the downlink transmission reception situation of at least one time unit in the second time unit set, that is, the HARQ-ACK information of the downlink transmission that the PUCCH on the second time unit should feed back. The at least one first sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the at least one first time unit set. The downlink transmission and reception status of at least one time unit in the at least one first time unit set is not successfully transmitted to the network device. That is, the first information includes not only the HARQ-ACK information of the downlink transmission that needs to be fed back currently, but also the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past. That is, the terminal device can dynamically extend the semi-static HARQ-ACK codebook to carry the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past (for example, unsuccessful feedback due to LBT failure).

In this way, if the terminal device successfully executes the LBT before reaching the second time unit, the terminal device can send the first information to the network device through the PUCCH on the second time unit, so that the network device can obtain the current information through the first information. In addition to the HARQ-ACK information that needs to be fed back, the HARQ-ACK information of downlink transmissions that were not successfully transmitted to the network equipment in the past can also be learned in time, avoiding the HARQ process that cannot be transmitted in time due to the HARQ-ACK feedback. Problems can improve system performance.

In a possible implementation manner, the unsuccessful transmission of the downlink transmission and reception of at least one time unit in the first time unit set to the network device may include any of the following:

Item 1: The terminal device fails to send the downlink transmission and reception status of at least one time unit in the first time unit set to the network device in the first time unit due to LBT failure, and the first time unit is all A time unit scheduled by the network device for transmitting downlink transmission and reception of at least one time unit in the first time unit set;

Item 2: The network device fails to parse the downlink transmission and reception situation of at least one time unit in the first time unit set from the terminal device;

Item 3: The network device instructs to delay the feedback of the downlink transmission and reception status on at least one time unit in the first time unit set.

It should be understood that when the above-mentioned first information includes multiple first sub-information, the reason why the reception of at least one time unit in the first time unit set indicated by each first sub-information is not successfully transmitted to the network device may be the same or may be different.

Exemplarily, the foregoing first information may include first sub-information 1, first sub-information 2, and first sub-information 3. Among them, the first sub-information 1 is used to feed back the downlink transmission and reception of at least one time unit in the first time unit set 1, and the first sub-information 2 is used to feed back the downlink transmission and reception of at least one time unit in the first time unit set 2. In case, the first sub-information 3 is used to feed back the downlink transmission and reception status of at least one time unit in the first time unit set 3.

At this time, the reason why the downlink transmission and reception of at least one time unit in the first time unit set 1, the first time unit set 2, and the first time unit set 3 is not successfully transmitted to the network device may be the same or different. For example, the reason why the downlink transmission and reception of at least one time unit in the first time unit set 1 and the first time unit set 2 is not successfully transmitted to the network device is the first item mentioned above, the first time unit set 3 The reason why the downlink transmission and reception status of at least one time unit is not successfully transmitted to the network device is the third item mentioned above; or, the downlink transmission and reception status of at least one time unit in the first time unit set 1 is not successfully transmitted to the network device The reason is the first item mentioned above. The downlink transmission and reception of at least one time unit in the first time unit set 2 is not successfully transmitted to the network device. The reason is the second item mentioned above, the first time unit set 3. The reason why the downlink transmission and reception of at least one time unit in at least one time unit is not successfully transmitted to the network device is the third item mentioned above; or, the first time unit set 1, the first time unit set 2, the first time unit set 3 The reason why the downlink transmission and reception of at least one time unit is not successfully transmitted to the network device is the second item mentioned above.

It should be understood that the aforementioned time unit may be a slot, mini-slot, symbol, etc., which is not limited in the present invention.

The aforementioned first time unit set and the second time unit set may have the same size, that is, the number of time units included in the first time unit set and the number of time units included in the second time unit set may be the same. The first time unit set and the second time unit set may be preset, or indicated by DCI, or indicated by higher layer signaling. Taking the time unit as the time slot slot n as an example, the first time unit set and the second time unit set mentioned here can be a set of time units corresponding to a semi-static codebook, such as the slot nk, k∈ described above K.

Exemplarily, assuming that the second time unit is slot n, when the terminal device detects that the DCI format is 1_0, then for slot n, the corresponding second time unit set can be slot {n-8,n- 7,n-6,n-5,n-4,n-3,n-2,n-1}. That is, when the terminal device performs HARQ-ACK feedback in slot n, it needs to respond to slot {n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1} HARQ-ACK feedback is performed on all possible downlink transmissions. If the downlink transmission is actually scheduled on the corresponding time unit, and the feedback indicating the downlink transmission is located in slot n, the terminal device performs feedback according to the actual reception situation. If the downlink transmission is not scheduled on the corresponding time unit, the terminal device feeds back NACK.

In this embodiment, the time units included in the first time unit set and the time units included in the second time unit set may or may not have an intersection.

Taking the time unit as the time slot as an example, if the time unit included in the first time unit set and the time unit included in the second time unit set do not have an intersection, each first sub-information is a HARQ-ACK codebook (That is, the first HARQ-ACK codebook), correspondingly, the second sub-information is also a HARQ-ACK codebook (that is, the second HARQ-ACK codebook). At this time, the HARQ codebook fed back on the second time unit is a combination of the first HARQ-ACK codebook and the second HARQ-ACK codebook, which is compared with the second time unit scheduled by the terminal device in the network device in the prior art In the above, compared to only feeding back the second HARQ-ACK codebook, the HARQ codebook fed back on the second time unit is a combination of the first HARQ-ACK codebook and the second HARQ-ACK codebook, which can be regarded as the first HARQ-ACK codebook. An extension of the HARQ-ACK codebook may alternatively be regarded as an extension of the second HARQ-ACK codebook.

If the time unit included in at least one first time unit set and the time unit included in the second time unit set overlap, that is, the same time unit is included, the terminal device can pass at least one of the first sub-information and the second sub-information Any one of the sub-information may indicate the reception situation of the downlink transmission that may exist on the same time unit. At this time, each first sub-information is the first HARQ-ACK codebook, or the second sub-information is the second HARQ-ACK codebook, specifically which sub-information is used to indicate that the same time unit may exist The reception of the downlink transmission is related.

For example, the first time unit set includes slot{n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1}, and the second time unit set includes slot {n+1,n+2,n+3,n+4,n+5,n+6,n+7,n+8}. In this example, there is no intersection between the time units included in the first time unit set and the time units included in the second time unit set. Therefore, the first sub-information can indicate slot{n-8,n-7,n -6,n-5,n-4,n-3,n-2,n-1} the possible reception of downlink transmission on each slot, the second sub-information indicates slot{n+1,n +2,n+3,n+4,n+5,n+6,n+7,n+8} the possible reception of downlink transmission on each slot. At this time, the first sub-information is the first HARQ-ACK codebook, and the second sub-information is the second HARQ-ACK codebook.

For another example, the first time unit set includes slot{n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1}, and the second time unit set includes slot{n-4,n-3,n-2,n-1,n,n+1,n+2,n+3}. In this example, the time units included in the first time unit set and the time units included in the second time unit set have an intersection slot {n-4, n-3, n-2, n-1}. If the first sub-information indicates slot{n-4,n-3,n-2,n-1} the possible reception of downlink transmission, the second sub-information indicates slot{n-4,n-3 , n-2, n-1} There may be a reception situation of downlink transmission, the first sub-information is the first HARQ-ACK codebook. At this time, since the second sub-information does not indicate the reception conditions of downlink transmissions that may exist on all time units in the second time unit set, the second sub-information is not a complete HARQ-ACK codebook. It can be understood that, at this time, the HARQ codebook fed back on the second time unit is a combination of the first HARQ-ACK codebook and the incomplete second HARQ-ACK codebook, which can be regarded as a reference to the first HARQ-ACK Extension of the codebook. In addition, by this way in which one of the sub-information indicates the reception situation of the downlink transmission that may exist on the same time unit, the bit overhead can be reduced.

If the second sub-information indicates slot{n-4,n-3,n-2,n-1} the possible reception of downlink transmission, the first sub-information indicates slot{n-4,n-3 , n-2, n-1} There may be a reception situation of downlink transmission, and the second sub-information is the second HARQ-ACK codebook. At this time, because the first sub-information does not indicate the reception conditions of downlink transmissions that may exist on all time units in the first time unit set, the first sub-information is not a complete HARQ-ACK codebook. It can be understood that, at this time, the HARQ codebook fed back on the second time unit is a combination of the second HARQ-ACK codebook and the incomplete first HARQ-ACK codebook, which can be regarded as a comparison of the second HARQ-ACK code This expansion. In addition, by this way in which one of the sub-information indicates the reception situation of the downlink transmission that may exist on the same time unit, the bit overhead can be reduced.

The following uses an example to schematically illustrate the method provided in the embodiment of the present application:

FIG. 3 is a schematic diagram 1 of a time domain resource provided by an embodiment of this application. As shown in Figure 3, taking the first time unit as slot n and the second time unit as slot m as an example, the network device sets the second time unit and the first time unit through the dl-DataToUL-ACK field of RRC signaling. Instruct to the terminal device. Assuming that the set indicated by the dl-DataToUL-ACK field is {7,5,3,2}, the first time unit set is slot{n-7,n-5,n-3,n-2}, and the second time The unit set is slot{m-7,m-5,m-3,m-2}.

In this embodiment, it is assumed that the terminal device fails to feed back the reception of the downlink transmission of slot {n-7, n-5, n-3, n-2} to the network device in slot n due to LBT failure, then the terminal When the network device schedules the terminal device to feedback the reception of the downlink transmission of slot {m-7,m-5,m-3,m-2} in slot m, the device can set slot{n-7,n-5,n The reception status of the downlink transmission of -3, n-2} is fed back to the network device together through the first information.

It should be noted that since slot n-3 and slot m-7 are the same time unit, in this scenario, the terminal device can indicate the possible downlink transmission in this slot through the first sub-information or the second sub-information Just accept the situation. Taking the first sub-information indicating the reception of possible downlink transmissions in the time slot as an example, the first sub-information is used to indicate the downlink transmission of slot {n-7, n-5, n-3, n-2} The second sub-information is used to indicate the reception status of the downlink transmission of slot{m-5, m-3, m-2}. At this time, the first sub-information is a complete HARQ-ACK codebook. It is understandable that, at this time, the HARQ codebook fed back on slot m is a combination of the first HARQ-ACK codebook and the incomplete second HARQ-ACK codebook, which can be regarded as a reference to the first HARQ-ACK codebook Extension.

Through this method of extending the semi-static HARQ-ACK codebook, the network device can timely learn the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past, thereby ensuring the performance of the downlink transmission.

It should be understood that for the example shown in FIG. 3, if the terminal device succeeds in LBT before slot n, that is, the terminal device feeds back slot {n-7,n-5,n-3, to the network device in slot n, n-2} the downlink transmission reception status, the subsequent network equipment schedules the terminal equipment to feedback the reception status of the downlink transmission slot {m-7,m-5,m-3,m-2} due to slot m n-3 and slot m-7 are the same time unit. Therefore, the terminal device can only feed back the reception of the downlink transmission of slot {m-5, m-3, m-2} on slot m, without feeding back the slot. The reception situation of m-7 downlink transmission. In this way, the bit overhead of HARQ-ACK feedback can be reduced.

In the information transmission method provided by the embodiments of the present application, the terminal device expands the semi-static HARQ-ACK codebook to successfully perform LBT before the time unit scheduled by the network device for HARQ feedback, and can include both current requirements The feedback of the HARQ-ACK information of the downlink transmission and the first information including the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past are sent to the network device, so that the network device can timely know that the previous transmission to the network was not successful. The HARQ-ACK information of the device's downlink transmission ensures the performance of the downlink transmission.

When the downlink transmission and reception of at least one time unit in the first time unit set mentioned above is not successfully transmitted to the network device, the reason is that the terminal device failed to send all data to the network device due to LBT failure. The downlink transmission and reception situation of at least one time unit in the first time unit set, or the network device has not successfully parsed the downlink transmission and reception situation of at least one time unit in the first time unit set from the terminal device, Then the terminal device may carry the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past in the first information in the following two ways, specifically:

The first way: the terminal device carries the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past in the first information based on the instruction of the network device. That is, the terminal equipment expands the semi-static HARQ-ACK codebook based on the instructions of the network equipment. The "HARQ-ACK information of downlink transmission that was not successfully transmitted to the network device in the past" mentioned here means that the HARQ-ACK information of the downlink transmission on the time unit before the second time unit where the current PUCCH is located is not successfully transmitted to the network device .

In this implementation manner, the method further includes the following steps:

The network device sends second information to the terminal device to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information through the second information. It should be understood that the second information mentioned here may be, for example, a newly added piece of information in the protocol, or may also be an existing DCI.

In a possible implementation manner, the second information may include at least one of the following: first indication information, the at least one first sub-information, and the total number M of the second sub-information. Wherein, the first indication information is used to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information. It should be understood that the M mentioned here refers to the total number of all the first sub-information plus the second sub-information, that is, the total number of all the first sub-information plus one.

Taking the second information including the first indication information as an example, the first indication information may use 1-bit information to instruct the terminal device to carry at least one time in the at least one first time unit set in the first information The downlink transmission and reception of the unit. Alternatively, the first indication information may use a toggled bit (toggled bit) to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information. It should be understood that when the foregoing second information is an existing DCI, the DCI can implement the foregoing first indication information by multiplexing fields in the existing DCI 1_0 or DCI 1_1, or adding fields.

Exemplarily, FIG. 4 is a second schematic diagram of a time domain resource provided by an embodiment of this application. As shown in Figure 4, assuming that the first time unit set is slot{n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1}, the second The time unit set is slot{m-8,m-7,m-6,m-5,m-4,m-3,m-2,m-1}, the first time unit is slot n, the second time The unit is slot m. Taking the above second information as DCI as an example, assuming that the HARQ-ACK feedback before slot n-8 is successfully transmitted to the network device, then in one or more scheduling information on slot n-8 to slot n-1, The network device may indicate that the terminal device does not need to carry past historical HARQ-ACK information through the first indication information carried by the DCI. Taking the first indication information as 1-bit information as an example, the network device can set the first indication information to "0" to instruct the terminal device to perform HARQ-ACK information feedback in slot n without carrying the past historical HARQ -ACK information. In this scenario, the terminal device is in slot n and only needs to feed back the downlink of slot {n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1} The reception of the transmission.

Suppose that in slot n, the downlink transmission of slot {n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1} is received due to the failure of the terminal equipment LBT The situation is not sent to the network device, or the terminal device will be in slot {n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1} The reception status of the downlink transmission is sent to the network device, but the network device fails to parse the feedback slot{n-8,n-7,n-6,n-5,n-4,n-3,n-2, n-1} The reception of the downlink transmission. In this scenario, the network device can use the first indication information carried in the DCI to indicate that the terminal device needs to carry past historical HARQ-ACKs in one or more subsequent scheduling information from slot m-3 to slot m-1 information. For example, the network device may set the first indication information to "1" to instruct the terminal device to carry the past historical HARQ-ACK information when performing HARQ-ACK information feedback in slot m. At this time, after receiving the first indication information, the UE can learn that when performing HARQ feedback on slot m, it needs to feed back slot {n-8,n-7,n-6,n-5,n-4 ,n-3,n-2,n-1}'s downlink transmission reception situation, that is, slot{n-8,n-7,n-6,n-5,n-4,n needs to be fed back on slot m -3, n-2, n-1, m-3, m-2, m-1} reception of the downlink transmission.

It should be understood that in the above example, the first indication information can also be set to "0" to instruct the terminal device to perform HARQ-ACK information feedback in slot m. In this scenario, the first indication information is set to "1" to indicate When instructing the terminal device to perform HARQ-ACK information feedback in slot n, it does not need to carry past historical HARQ-ACK information.

In some embodiments, the above-mentioned first indication information may also be indication information indicating other information to the terminal device, which is used to implicitly instruct the terminal device to carry the at least one first time unit set in the first information Downlink transmission and reception of at least one time unit. For example, the above-mentioned first indication information may be indication information indicating a COT structure. It can be understood that the network device may also implicitly indicate the need to feed back HARQ-ACK information that has not been successfully fed back in the history through other first indication information, which will not be repeated here.

Taking the second information including the at least one first sub-information and the total number M of the second sub-information as an example, the second information implicitly indicates to the terminal device the first time unit set and the second time through M. The total number of unit sets. The default value of M is 1, that is, if M=1, it means that the second time unit only needs to feed back the reception of the downlink transmission of at least one time unit in the corresponding second time unit set. If M>1, it means that in the second time unit, The reception situation of the downlink transmission of at least one time unit in the corresponding first time unit set that is not successfully received on the M-1 first time unit before the time unit

Exemplarily, continue to refer to the example shown in Figure 4, assuming that the terminal device LBT failure caused slot {n-8, n-7, n-6, n-5, n-4, n-3, n-2, The reception status of the downlink transmission of n-1} is not sent to the network device, or the terminal device will slot {n-8,n-7,n-6,n-5,n-4,n-3, The reception status of the downlink transmission of n-2,n-1} is sent to the network device, but the network device fails to parse the feedback slot{n-8,n-7,n-6,n-5,n-4 ,n-3,n-2,n-1} For the reception of downlink transmissions, the network device can indicate the value of M through DCI in one or more of the scheduling information from slot m-3 to slot m-1 It is 2, implicitly indicating that the terminal device not only needs to feed back the downlink transmission reception status of at least one time unit in the second time unit set, but also needs to feed back the downlink transmission reception status of at least one time unit in the first time unit set. After the terminal device receives the DCI, it can be known from the value of M that the latest feedback slot{n-8,n-7,n-6,n-5,n-4,n-3,n-2,n -1} The reception of the downlink transmission was not successfully sent to the network device. In this way, when terminal equipment performs HARQ feedback on slot m, it needs to feedback slot {n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1} together The reception status of the downlink transmission, that is, slot {n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1,m- needs to be fed back on slot m 3, m-2, m-1} the reception of the downlink transmission.

Taking the second information including the first indication information and the total number M of the at least one first sub-information and the second sub-information as an example, the second information may indicate that the terminal device is in the first indication information through the first indication information. The information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set, and further indicates through M that the terminal device needs to carry the downlink transmission and reception of at least one time unit in the first time unit set. Happening.

In the method provided by the embodiment of the present application, in the unlicensed frequency band, the terminal device needs to perform LBT before PUCCH transmission, and the uncertainty of LBT causes the terminal device to be unable to access the channel for PUCCH transmission. At this time, the network device can display or implicitly instruct the terminal device to re-feed back on the subsequent time unit the reception of the downlink transmission that was not successfully transmitted to the network device through the above-mentioned second information, so that the terminal device can respond to the current time. The corresponding time unit and the time unit that has not been successfully fed back in the past are fed back together after taking the union. In some embodiments, it can also be said that the codebook corresponding to the current moment and the codebook that have not been successfully fed back in the past are combined and fed back together. In this way, the alignment of the HARQ-ACK codebook between the network device and the terminal device can be effectively ensured, and the problem that the HARQ process cannot be released due to the HARQ-ACK feedback cannot be transmitted in time due to the HARQ process has been occupied and ultimately improved system performance.

The second way: the terminal device autonomously carries in the first information the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past. That is, the terminal device autonomously extends the semi-static HARQ-ACK codebook. The "HARQ-ACK information of downlink transmission that was not successfully transmitted to the network device in the past" mentioned here means that the HARQ-ACK information of the downlink transmission on the time unit before the second time unit where the current PUCCH is located is not successfully transmitted to the network device .

In this scenario, the first information may further include: third sub-information, to indicate to the network device through the third sub-information that the terminal device carries the at least one first time unit in the first information The downlink transmission and reception status of at least one time unit in the set.

In a possible implementation manner, the third sub-information includes at least one of the following: second indication information, the total number of the at least one first sub-information and the second sub-information, and the at least one first sub-information The HARQ identifier (for example, HARQ ID) corresponding to the downlink transmission of at least one time unit in the time unit set. The second indication information is used to indicate that the first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.

Taking the third sub-information including the second indication information as an example, after the network device receives the first information sent by the terminal device, the network device can use the third sub-information to learn that the terminal device is in the first information except for the second time unit set In addition to the downlink transmission and reception status of at least one time unit in, also carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set. It should be understood that for how the second indication information indicates that the first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set, refer to the description of the first indication information in the foregoing. The implementation is similar, so I won’t repeat it here.

Taking the third sub-information including the total number M of the at least one first sub-information and the second sub-information as an example, when the network device receives the first information sent by the terminal device, the network device can learn from the M In addition to the second time unit set in the first information, the terminal device also carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set and the number of the first time unit set. In this way, it is possible to accurately indicate that the terminal device carries the downlink transmission and reception status of at least one time unit in the several first time unit sets.

Taking the third sub-information including the HARQ identifier corresponding to the downlink transmission of at least one time unit in the at least one first time unit set as an example, when the network device receives the first information sent by the terminal device, the network device can use the The third sub-information includes the HARQ identifier corresponding to the downlink transmission of at least one time unit in the at least one first time unit set, and it is inferred that the downlink transmission corresponding to these HARQ identifiers belongs to at least one first time unit, so that it can be learned In addition to the second time unit set in the first information, the terminal device also carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.

It should be understood that although the above example uses the third sub-information to include the second indication information, the total number of the at least one first sub-information and the second sub-information, and at least one time unit in the at least one first time unit set Take any one of the HARQ identifiers corresponding to the downlink transmission as an example, how the third sub-information indicates to the network device that the terminal device carries at least one of the at least one first time unit set in the first information The downlink transmission and reception in time units are explained. However, those skilled in the art can understand that the third sub-information may also carry the at least two items above to indicate that the terminal device carries at least one of the at least one first time unit set in the first information. The implementation of the downlink transmission and reception of the time unit is similar, and will not be repeated here.

In the method provided by the embodiment of the present application, in the unlicensed frequency band, the terminal device needs to perform LBT before PUCCH transmission, and the uncertainty of LBT causes the terminal device to be unable to access the channel for PUCCH transmission. At this time, the terminal device can independently feed back the time unit corresponding to the current moment and the time unit that has not been successfully fed back in the past, and then indicate to the network device that the terminal device is in the first sub-information. A piece of information carries a downlink transmission and reception situation of at least one time unit in the at least one first time unit set. In this way, the alignment of the HARQ-ACK codebook between the network device and the terminal device can be effectively ensured, and the problem that the HARQ process cannot be released due to the HARQ-ACK feedback cannot be transmitted in time due to the HARQ process has been occupied and ultimately improved system performance.

As mentioned above, the sending device can share the channel usage right within the acquired channel occupation time with other devices. For example, when the sending device is a network device, the network device can share the channel usage right to the terminal device, that is, the terminal is allowed The device transmits during the channel occupied time. Therefore, as a possible implementation, in order to ensure that HARQ-ACK feedback can be transmitted in time, the network device can instruct the terminal device to perform HARQ-ACK feedback in the COT of the network device as much as possible through scheduling, and the terminal device can Access the channel directly or through a fast LBT mechanism (for example, the aforementioned type 2 channel listening), and send HARQ-ACK feedback. For the downlink transmission at the end of the COT, the terminal device cannot perform HARQ-ACK feedback in the current COT, and the network device can also instruct the terminal device to delay the corresponding HARQ-ACK feedback.

When the downlink transmission and reception of at least one time unit in the first time unit set mentioned above is not successfully transmitted to the network device, the reason is that the network device instructs to delay feedback on at least one time unit in the first time unit set. In the case of downlink transmission and reception, the terminal device can carry the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the first information in the following two ways, specifically:

The first way: the terminal device carries the HARQ-ACK information for the delayed feedback downlink transmission in the first information based on the instruction of the network device.

FIG. 5 is a third schematic diagram of a time domain resource provided by an embodiment of this application. As shown in FIG. 5, for the downlink transmission at the end of the first COT, due to the processing capability of the terminal device (such as processing delay, scheduling delay, etc.), feedback cannot be performed in the first COT. At this time, the network device may indicate to the terminal device that the HARQ-ACK feedback corresponding to the downlink transmission at the end of the first COT requires delayed feedback. For example, the network device may feed back the HARQ-ACK information corresponding to the downlink transmission at the end of the first COT through the DCI indication delay. Exemplarily, the network device may carry 1-bit information in the scheduling information DCI of the downlink transmission at the end of the first COT to indicate to the terminal device that the HARQ feedback corresponding to the downlink transmission needs to be delayed. Alternatively, the network device uses the PDSCH-to-HARQ-timing-indicator field in the downlink scheduling information to indicate a special value (for example, 0, or X, or an invalid value) to indicate the HARQ feedback corresponding to the downlink transmission Need to delay. Correspondingly, when the terminal device receives the indication of the special value in the downlink scheduling information, it can learn that the HARQ feedback corresponding to the current transmission needs to be delayed.

In this scenario, the network device may send second information to the terminal device to instruct the terminal device through the second information to carry the HARQ-ACK of the downlink transmission at the end of the first COT that was delayed and fed back in the first information. information. It should be understood that the second information mentioned here may be, for example, a newly added piece of information in the protocol, an existing DCI, or a new DCI format.

In a possible implementation manner, the second information may include the information of the second time unit to indicate the actual transmission time of the HARQ feedback corresponding to the downlink transmission in the first COT through the information of the second time unit. The position indirectly indicates that the terminal device carries the HARQ-ACK information of the downlink transmission at the end of the first COT that was delayed and fed back in the first information. It should be understood that the information of the second time unit carried in the second information may be an absolute time position, that is, it indicates the absolute time position of the HARQ feedback corresponding to the downlink transmission in the first COT, or a relative time offset, that is, Indicate the time offset between the time position of the HARQ feedback corresponding to the downlink transmission in the first COT and the second time unit. Based on the second information, the terminal device can learn the real time position of the HARQ feedback corresponding to the downlink transmission in the first COT.

Alternatively, the second information may include the first indication information to instruct the terminal device to carry in the first information the HARQ of the downlink transmission at the end of the first COT that was delayed and fed back by the first indication information. ACK information. The first indication information may use 1-bit information to instruct the terminal device to carry in the first information the HARQ-ACK information of the downlink transmission at the end of the first COT that has been delayed and fed back. Alternatively, the first indication information may use a toggled bit (toggled bit) to instruct the terminal device to carry in the first information the HARQ-ACK information of the downlink transmission at the end of the first COT that was previously delayed and fed back.

In some embodiments, the above-mentioned first indication information may also be indication information indicating other information to the terminal device, which is used to implicitly indicate that the terminal device carries the first COT end that was previously postponed and fed back in the first information. HARQ-ACK information for downlink transmission at For example, the above-mentioned first indication information may be indication information indicating a COT structure. It can be understood that the network device may also use other first indication information to implicitly instruct the terminal device to carry the HARQ-ACK information of the downlink transmission at the end of the first COT that was delayed and fed back in the first information.

Alternatively, the second information may include the total number M of the at least one first sub-information and the second sub-information, so as to implicitly indicate to the terminal device that the terminal device is in the first information through M. Carry the HARQ-ACK information of the downlink transmission at the end of the first COT that was previously delayed and fed back.

It should be understood that the network device may also carry the aforementioned first indication information, the total number of the at least one first sub-information and the second sub-information, and the information of the second time unit in the second information. At least one of the following methods is used to instruct the terminal device to carry in the first information the HARQ-ACK information of the downlink transmission at the end of the first COT that has been delayed and fed back.

In this embodiment, the dynamic expansion of the semi-static HARQ-ACK codebook depends on the processing capability of the terminal device. Here, the processing capability of the terminal device may refer to the HARQ feedback that the terminal device can respond to the downlink transmission received at the first time n at the fastest time corresponding to the first time n offset by N second times . For ease of description, the size of N is used to refer to the processing capacity of the terminal device. It can be understood that the stronger the processing capability of the terminal device, the smaller the value of N. Optionally, the granularity of the first time and the second time may be the same or different. The first time and the second time can be one of symbol, slot, mini-slot, etc., or it can be an absolute length of time, such as seconds, milliseconds, microseconds, etc. One is not limited in the embodiment of this application.

Then, in this embodiment, before generating the first information, the terminal device may first determine at least one time in the at least one first time unit set at which the downlink transmission and reception status is to be fed back according to the processing capability of the terminal device unit.

Here is an example to illustrate:

Continuing to refer to the example shown in FIG. 5, it is assumed that the processing capability of the terminal device is N=3 (time granularity is slot), that is, the terminal device needs to use 3 slots to process a downlink transmission. For PUCCH1 (assuming it corresponds to slot n), the set of time units corresponding to PUCCH1 is slot {n-8,n-7,n-6,n-5,n-4,n-3,n-2,n- 1}.

It is assumed that there is downlink transmission in each slot as shown in Table 2 below:

Table 2

时隙Time slot	是否有下行传输Whether there is downlink transmission	是否有DCIIs there DCI	DCI所指示的k的值The value of k indicated by DCI
slot n-8slot n-8	无no	无no	--
slot n-7slot n-7	无no	无no	--
slot n-6slot n-6	无no	无no	--
slot n-5slot n-5	是Yes	是Yes	55
slot n-4slot n-4	是Yes	是Yes	44
slot n-3slot n-3	无no	无no	--
slot n-2slot n-2	是Yes	是Yes	XX
slot n-1slot n-1	是Yes	是Yes	XX

Based on the foregoing Table 2, for PUCCH1 (assumed to correspond to slot n), the terminal device can only carry the HARQ feedback corresponding to the downlink transmission before slot n-2 (including slot n-3) on the PUCCH1. Affected by the processing capabilities of the terminal device, the terminal device cannot complete the processing of the downlink transmission on slot n-2 and slot n-1 before slot n. Therefore, the reception of the downlink transmission on slot n-2 and slot n-1 The situation cannot be reported on PUCCH1.

Assuming that PUCCH1 is located at the end of COT1, in order to maximize the success rate of the terminal device accessing the channel, the network device can instruct the terminal device to delay the HARQ feedback corresponding to slot n-2 and slot n-1 through two-step instructions. For example, the network device sets the PDSCH-to-HARQ-timing-indicator field in the downlink DCI corresponding to slot n-2 and slot n-1 to a special value (for example, 0, X, or invalid value). ) To indicate the HARQ feedback corresponding to the downlink transmission of slot n-2 and slot n-1 respectively for delay. Table 2 is an example of a special value X.

After the network device successfully obtains the channel occupancy time COT2 through the LBT, the terminal device can be further instructed to feed back HARQ corresponding to slot n-2 and slot n-1 downlink transmission on PUCCH2 (assuming corresponding slot m) for transmission. Exemplarily, when the network device successfully accesses the channel and obtains COT2, it can send downlink DCI to the terminal device, indicating that the terminal device needs to feed back HARQ information delayed in COT1 on PUCCH2. The manner in which the downlink DCI indicates that the terminal device needs to feed back the HARQ information delayed in COT1 feedback on the PUCCH2 can be referred to the foregoing description. It should be understood that, in the semi-static codebook corresponding to PUCCH1, NACK is fed back for the reception of slot n-2 and slot n-1 that indicate the feedback delay.

Assume that the first time unit set is slot {n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1}. That is, when the terminal device performs HARQ-ACK feedback in slot n, it needs to respond to slot {n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1} HARQ-ACK feedback is performed on all possible downlink transmissions. If the transmission is actually scheduled in the corresponding time unit, and the HARQ feedback indicating the transmission is in slot n, the terminal device will feed back according to the actual reception situation, otherwise, the terminal device will feed back a NACK. As shown in Figure 5, in slot{n-8,n-7,n-6,n-5,n-4,n-3,n-2,n-1}, only slot n-5, slot Downlink transmission is scheduled on n-4, and the indicated HARQ feeds back PUCCH1 located on slot n. For slot n-2 and slot n-1, although the downlink transmission is scheduled, the network device indicates that the feedback needs to be delayed, that is, the indicated feedback time is a special value X, and the corresponding downlink transmission should also feed back NACK.

At this time, for PUCCH2, after receiving the second information sent by the network device, the terminal device determines that it needs to feed back the HARQ information delayed on COT1 on PUCCH2, that is, except for the HARQ on the second time unit set corresponding to PUCCH2. In addition to the feedback, it is also necessary to carry the reception status of the downlink transmission that was previously delayed feedback. At this time, the first sub-information included in the first information on PUCCH2 is used to indicate the reception of the previously delayed downlink transmission feedback. Therefore, the terminal device needs to determine, according to the processing capability of the terminal device, at least one time unit in the at least one first time unit set to be fed back on the downlink transmission and reception situation. Optionally, the network device may indicate the size of the first time unit set. Or the maximum value of the size of the first time unit set is stipulated by the protocol.

In this example, it is assumed that the processing capability of the terminal device is N=3, or the network device indicates N=3, that is, the terminal device needs to feed back the reception status of the downlink transmission of 2 time units in the first time unit set through the first sub-information . That is to say, the reception situation of the downlink transmission of slot{n-2,n-1} in the first time unit set. For PUCCH2, the corresponding second time unit set is slot {m-8, m-7, m-6, m-5, m-4, m-3, m-2, m-1}. In this example, slot m-8 is the upstream transmission unit. Therefore, slot m-8 should be excluded from the second time unit set, that is, slot{m-7,m-6,m-5,m-4,m- 3,m-2,m-1}. In other words, slot{m-7,m-6,m-5,m-4,m-3,m-2,m-1}+slot{n-2,n-1 can be fed back through the first information } The reception status of the downlink transmission for at least one time unit. It should be understood that the "+" used here can be understood as the concatenation and addition of two sets, or as the union.

It should be noted that the example shown in Figure 5 is only to illustrate how to feed back the reception of the downlink transmission of slot n-2 and slot n-1 at the tail of COT1. For slot{m-7,m-6,m-5 , m-4, m-3, m-2, m-1} which time units have downlink transmission, and the value of k indicated by the DCI on these time units is not illustrated again.

The second way: the terminal device autonomously carries the HARQ-ACK information of the delayed feedback downlink transmission in the first information.

Specifically, in this embodiment, the network device does not adopt the two-step scheduling HARQ feedback mode, but only indicates the delay of the HARQ feedback. In the subsequent transmission, the terminal device autonomously carries the feedback indicating the need to be delayed in the current feedback. In a specific implementation, the terminal device may determine at least one time unit in the at least one first time unit set to be fed back on the downlink transmission reception condition according to the processing capability of the terminal device, and determine the at least one possible time unit in the at least one time unit. The reception status of the existing downlink transmission is indicated by the first sub-information.

In this scenario, the first information may further include: third sub-information, to indicate to the network device through the third sub-information that the terminal device carries the at least one first time unit in the first information The downlink transmission and reception status of at least one time unit in the set. That is, it carries the reception status of the downlink transmission that previously indicated delay feedback.

Regarding how the terminal device uses the third sub-information to indicate, refer to the foregoing description of the third sub-information, which will not be repeated.

Correspondingly, after receiving the first information, the network device may determine, according to the third sub-information, that the first information carries HARQ-ACK information that was previously delayed for feedback of downlink transmission. For example, the network device may determine, according to the processing capability of the terminal device, at least one time unit in the at least one first time unit set corresponding to the downlink transmission reception situation indicated in the first sub-information, specific implementation manner It is similar to how the terminal device determines at least one time unit in the at least one first time unit set corresponding to the downlink transmission reception situation indicated in the first sub-information according to the capabilities of the terminal device, and will not be repeated here. .

The method provided in the embodiments of this application effectively solves the problem of using two-step scheduling HARQ feedback in an unlicensed frequency band scenario (that is, one scheduling indicator is delayed to feedback the reception of downlink transmission, and one scheduling indicator is delayed before the feedback is fed back. The second information)), or when the HARQ feedback delay is indicated, it can effectively ensure the problem of how to align the HARQ-ACK codebook between the network device and the terminal device, and avoid the HARQ process being occupied because the HARQ-ACK feedback cannot be transmitted in time Problems that cannot be released will ultimately improve system performance.

It should be understood that although the foregoing examples all take the first time unit and the second time unit belonging to different COTs as examples, the method of the embodiment of the present application is described and introduced. However, those skilled in the art can understand that the method embodiment may also be applicable to the case where the first time unit and the second time unit are located in one COT, which will not be repeated here.

In addition, in the embodiment of the present application, the method provided by the embodiment of the present application is explained and introduced by taking the foregoing first information including at least one of the first sub-information and the second sub-information as an example. As for the distribution mode of the at least one first sub-information and the second sub-information in the first information, there is no limitation on this. For example, at least one of the first sub-information and the second sub-information may form a total bit information according to the time sequence of the corresponding time unit set. Taking the example shown in FIG. 4 as an example, assuming that 1 represents ACK and 0 represents NACK, and each downlink transmission is successfully received, at least one of the first sub-information and the second sub-information may be as follows: {011101100111}.

In the information transmission method provided in the embodiments of the present application, the terminal device expands the semi-static HARQ-ACK codebook to successfully perform LBT before the time unit scheduled by the network device for HARQ feedback, and can include both current requirements The feedback of the HARQ-ACK information of the downlink transmission and the first information including the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past are sent to the network device, so that the network device can timely know that the previous transmission to the network has not been successful. The HARQ-ACK information of the device's downlink transmission avoids the problem that the HARQ process is always occupied and cannot be released due to the HARQ-ACK feedback cannot be transmitted in time, and can improve the performance of the system's downlink transmission.

FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the application. As shown in FIG. 6, the terminal device may include: a processing module 11 and a sending module 12. among them,

The processing module 11 is configured to generate first information, where the first information includes: at least one first sub-information and second sub-information, and the at least one first sub-information is used to indicate that at least one of the at least one first time unit set is The downlink transmission and reception status of one time unit; the second sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the second time unit set, and the downlink transmission and reception status of at least one time unit in each first time unit set The transmission and reception situation is not successfully transmitted to the network device; in a possible implementation manner, the at least one first sub-information is at least one first HARQ-ACK codebook, and/or the second sub-information is the second HARQ -ACK codebook.

The sending module 12 is configured to send the first information to the network device in a second time unit after the channel listening is successful.

It should be understood that the unsuccessful transmission of the downlink transmission and reception status of at least one time unit in the first time unit set to the network device may include: the terminal device failed to transmit to the network device in the first time unit due to channel listening failure. The device sends the downlink transmission and reception status of at least one time unit in the first time unit set, where the first time unit is the downlink that is scheduled by the network device to transmit at least one time unit in the first time unit set The time unit of the transmission and reception status; or, the network device has not successfully parsed the downlink transmission and reception status of at least one time unit in the first time unit set from the terminal device; or, the network device indicates the delay feedback The downlink transmission and reception situation on at least one time unit in the first time unit set.

Continuing to refer to FIG. 6, in a possible implementation manner, the terminal device may further include: a receiving module 13; wherein, the receiving module 13 is configured to receive second information from the network device, and the second information includes the following The at least one item: the first indication information, the total number of the at least one first sub-information and the second sub-information, and the information of the second time unit; the first indication information is used to indicate the terminal The device carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information.

Alternatively, the first information further includes: third sub-information, and the third sub-information includes at least one of the following: second indication information, the sum of the at least one first sub-information and the second sub-information The number, the identifier of the hybrid automatic repeat request process corresponding to the downlink transmission of at least one time unit in the at least one first time unit set; wherein the second indication information is used to indicate that the first information carries something The downlink transmission and reception situation of at least one time unit in the at least one first time unit set.

In a possible implementation manner, the network device instructs to delay the feedback of the downlink transmission and reception situation on at least one time unit in the at least one first time unit set; then the processing module 11 is further configured to respond according to the terminal equipment The processing capability of determining at least one time unit in the at least one first time unit set to be fed back on the downlink transmission reception situation. Wherein, the first time unit and the second time unit belong to different channel occupation times, or belong to the same channel occupation time.

The terminal device provided in the embodiment of the present application can perform the actions of the terminal device in the foregoing method embodiment, and its implementation principles and technical effects are similar, and will not be repeated here.

Fig. 7 is a schematic structural diagram of a network device provided by an embodiment of the application. As shown in FIG. 7, the network device may include: a receiving module 21 and a processing module 22. among them,

The receiving module 21 is configured to receive first information from a terminal device on a second time unit, where the first information includes: at least one first sub-information and second sub-information, and the at least one first sub-information is used for Indicates the downlink transmission and reception status of at least one time unit in at least one first time unit set; the second sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the second time unit set, each of the first The downlink transmission and reception situation of at least one time unit in the time unit set is not successfully transmitted to the network device; in a possible implementation manner, the at least one first sub-information is at least one first HARQ-ACK codebook, and/or, The second sub-information is a second HARQ-ACK codebook.

The processing module 22 is configured to obtain the downlink transmission and reception status of at least one time unit in the at least one first time unit set according to the first information, and the downlink transmission and reception status of at least one time unit in the second time unit set Transmission and reception conditions.

Continuing to refer to FIG. 7, in a possible implementation manner, the network device may further include: a sending module 23; wherein, the sending module 23 is configured to send second information to the terminal device, and the second information includes the following At least one item: first indication information, the total number of the at least one first sub-information and the second sub-information, and information about the second time unit; the first indication information is used to indicate the terminal device The first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.

In a possible implementation manner, the network device instructs to delay the feedback of the downlink transmission and reception situation on at least one time unit in the at least one first time unit set; then the processing module 22 is further configured to respond according to the terminal equipment The processing capability of determining at least one time unit in the at least one first time unit set corresponding to the downlink transmission reception situation indicated in the first sub-information. Wherein, the first time unit and the second time unit belong to different channel occupation times, or belong to the same channel occupation time.

The network device provided in the embodiment of the present application can perform the actions of the network device in the foregoing method embodiment, and its implementation principles and technical effects are similar, and will not be repeated here.

It should be noted that it should be understood that the above sending module can be a transmitter in actual implementation, and the receiving module can be a receiver in actual implementation. The processing module can be implemented in the form of software calling through processing elements; it can also be implemented in the form of hardware. For example, the processing module may be a separately established processing element, or it may be integrated in a chip of the above-mentioned device for implementation. In addition, it may also be stored in the memory of the above-mentioned device in the form of program code, which is determined by a certain processing element of the above-mentioned device. Call and execute the functions of the above processing module. In addition, all or part of these modules can be integrated together or implemented independently. The processing element described here may be an integrated circuit with signal processing capability. In the implementation process, each step of the above method or each of the above modules can be completed by hardware integrated logic circuits in the processor element or instructions in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (ASIC), or one or more microprocessors (digital signal processor, DSP), or, one or more field programmable gate arrays (FPGA), etc. For another example, when one of the above modules is implemented in the form of processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program codes. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

FIG. 8 is a schematic structural diagram of another terminal device provided by an embodiment of this application. As shown in Figure 8, the terminal device may include: a processor 31 (such as a CPU), a memory 32, a receiver 33, and a transmitter 34; both the receiver 33 and the transmitter 34 are coupled to the processor 31, and the processor 31 controls the receiving The receiving action of the transmitter 33 and the processor 31 controlling the sending action of the transmitter 34; the memory 32 may include high-speed random-access memory (RAM), or may also include non-volatile memory (non-volatile memory, NVM), such as at least one disk storage. The memory 32 can store various instructions for completing various processing functions and implementing the method steps of the present application. Optionally, the terminal device involved in the present application may further include: a power supply 35, a communication bus 36, and a communication port 37. The receiver 33 and the transmitter 34 may be integrated in the transceiver of the terminal device, or may be independent transceiver antennas on the terminal device. The communication bus 36 is used to implement communication connections between components. The aforementioned communication port 37 is used to implement connection and communication between the terminal device and other peripherals.

In the embodiment of the present application, the above-mentioned memory 32 is used to store computer executable program code, and the program code includes instructions; when the processor 31 executes the instructions, the instructions cause the processor 31 of the terminal device to perform the processing of the terminal device in the above method embodiment. The action is to make the receiver 33 execute the receiving action of the terminal device in the foregoing method embodiment, and make the transmitter 34 execute the sending action of the terminal device in the foregoing method embodiment. The implementation principles and technical effects are similar, and will not be repeated here.

FIG. 9 is a schematic structural diagram of another network device provided by an embodiment of this application. As shown in FIG. 9, the network device may include: a processor 41 (for example, a CPU), a memory 42, a receiver 43, and a transmitter 44; both the receiver 43 and the transmitter 44 are coupled to the processor 41, and the processor 41 controls the receiving The receiving action of the transmitter 43, the processor 41 controls the sending action of the transmitter 44; the memory 42 may include high-speed RAM memory, or may also include non-volatile memory NVM, such as at least one disk memory, and the memory 42 can store various instructions , To complete various processing functions and implement the method steps of this application. Optionally, the network device involved in the present application may further include: a power supply 45, a communication bus 46, and a communication port 47. The receiver 43 and the transmitter 44 may be integrated in the transceiver of the network device, or may be independent transceiver antennas on the network device. The communication bus 46 is used to implement communication connections between components. The aforementioned communication port 47 is used to implement connection and communication between the network device and other peripherals.

In this application, the above-mentioned memory 42 is used to store computer executable program code, the program code includes instructions; when the processor 41 executes the instructions, the instructions cause the processor 41 of the network device to perform the processing actions of the network device in the above method embodiment, The receiver 43 is caused to execute the receiving action of the network device in the foregoing method embodiment, and the transmitter 44 is caused to execute the sending action of the network device in the foregoing method embodiment. The implementation principles and technical effects are similar, and will not be repeated here.

The embodiment of the present application provides a communication device. The communication device may be the terminal device in the foregoing method implementation manner, or may be a chip provided in the terminal device. The communication device includes a processor, which is coupled to a memory and can be used to execute instructions in the memory to implement the methods in the foregoing various possible implementation manners. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

An embodiment of the present application provides a communication device. The communication device may be the network device in the foregoing method implementation manner, or may be a chip set in the network device. The communication device includes a processor, which is coupled to a memory and can be used to execute instructions in the memory to implement the methods in the foregoing various possible implementation manners. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

The embodiment of the present application provides a communication system, including: a network device and a terminal device. The terminal device is used to execute the methods in the foregoing various possible implementation manners. The network device is used to execute the methods in the foregoing various possible implementation manners.

An embodiment of the present application provides a chip, which is connected to a memory, and is used to read and execute a software program stored in the memory, so as to implement the method provided in the foregoing embodiment.

An embodiment of the present application provides a chip that includes a processor and a memory, and the processor is configured to read a software program stored in the memory to implement the method provided in the above-mentioned implementation manner.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions can be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website, computer, server or data center. A 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 or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

The term "plurality" herein refers to two or more. The term "and/or" in this article is only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship; in the formula, the character "/" indicates that the associated objects before and after are in a "division" relationship.

It can be understood that the various numerical numbers involved in the embodiments of the present application are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application.

It can be understood that, in the embodiments of this application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not be implemented in this application. The implementation process of the example constitutes any limitation.

Claims

An information transmission method, characterized in that the method includes:

The terminal device generates first information, the first information includes: at least one first sub-information and second sub-information, and the at least one first sub-information is used to indicate the information of at least one time unit in the at least one first time unit set Downlink transmission and reception status; the second sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the second time unit set, and the downlink transmission and reception status of at least one time unit in each first time unit set is not Successfully transmitted to network equipment;

After successful channel listening, the terminal device sends the first information to the network device in a second time unit.
The method according to claim 1, wherein the at least one first sub-information is at least one first HARQ-ACK codebook, and/or the second sub-information is a second HARQ-ACK codebook .
The method according to claim 1 or 2, wherein the unsuccessful transmission of the downlink transmission and reception status of at least one time unit in the first time unit set to the network device comprises:

The terminal device failed to send the downlink transmission and reception status of at least one time unit in the first time unit set to the network device in the first time unit due to channel listening failure, and the first time unit is the network A time unit scheduled by the device for transmitting the downlink transmission and reception status of at least one time unit in the first time unit set; or,

The network device fails to parse the downlink transmission and reception status of at least one time unit in the first time unit set from the terminal device; or,

The network device instructs to delay the feedback of the downlink transmission reception situation on at least one time unit in the first time unit set.
The method according to any one of claims 1-3, wherein the method further comprises:

The terminal device receives second information from the network device, where the second information includes at least one of the following:

First indication information, the total number of the at least one first sub-information and the second sub-information, and the information of the second time unit;

Wherein, the first indication information is used to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information.
The method according to any one of claims 1-3, wherein the first information further comprises: third sub-information, and the third sub-information includes at least one of the following:

The second indication information, the total number of the at least one first sub-information and the second sub-information, the status of the hybrid automatic repeat request process corresponding to the downlink transmission of at least one time unit in the at least one first time unit set Logo

The second indication information is used to indicate that the first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.
The method according to any one of claims 3-5, wherein the network device instructs to delay the feedback of the downlink transmission reception status on at least one time unit in the at least one first time unit set, and the method further include:

The terminal device determines, according to the processing capability of the terminal device, at least one time unit in the at least one first time unit set to be fed back on the downlink transmission reception situation.
The method according to claim 6, wherein the first time unit and the second time unit belong to different channel occupation times.
An information transmission method, characterized in that the method includes:

The network device receives first information from the terminal device on the second time unit, where the first information includes: at least one first sub-information and second sub-information, and the at least one first sub-information is used to indicate at least one first sub-information The downlink transmission and reception status of at least one time unit in a time unit set; the second sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the second time unit set, and each of the first time unit sets The downlink transmission and reception conditions of at least one time unit are not successfully transmitted to the network device;

The network device obtains, according to the first information, the downlink transmission and reception of at least one time unit in the at least one first time unit set, and the downlink transmission and reception of at least one time unit in the second time unit set Happening.
The method according to claim 8, wherein the at least one first sub-information is at least one first HARQ-ACK codebook, and/or the second sub-information is a second HARQ-ACK codebook .
The method according to claim 8 or 9, wherein the unsuccessful transmission of the downlink transmission and reception status of at least one time unit in the first time unit set to the network device comprises:

The terminal device failed to send the first sub-information to the network device in the first time unit due to channel listening failure, and the first time unit is the set of first time units scheduled by the network device for transmitting the first time unit The time unit of at least one time unit in the downlink transmission and reception situation; or,

The network device fails to parse the first sub-information from the terminal device; or,

The network device instructs to delay the feedback of the downlink transmission reception situation on at least one time unit in the first time unit set.
The method according to any one of claims 8-10, wherein the method further comprises:

The network device sends second information to the terminal device, where the second information includes at least one of the following:

First indication information, the total number of the at least one first sub-information and the second sub-information, and the information of the second time unit;

Wherein, the first indication information is used to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information.
The method according to any one of claims 8-10, wherein the first information further comprises: third sub-information, and the third sub-information includes at least one of the following:

The second indication information, the total number of the at least one first sub-information and the second sub-information, the status of the hybrid automatic repeat request process corresponding to the downlink transmission of at least one time unit in the at least one first time unit set Logo

The second indication information is used to indicate that the first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.
The method according to any one of claims 10-12, wherein the network device instructs to delay the feedback of the downlink transmission reception status on at least one time unit in the at least one first time unit set, and the method further include:

The network device determines, according to the processing capability of the terminal device, at least one time unit in the at least one first time unit set corresponding to the downlink transmission reception situation indicated in the first sub-information.
The method according to claim 13, wherein the first time unit and the second time unit belong to different channel occupation times.
A terminal device, characterized in that the terminal device includes:

The processing module is configured to generate first information, where the first information includes: at least one first sub-information and second sub-information, and the at least one first sub-information is used to indicate at least one of the at least one first time unit set The downlink transmission and reception status of the time unit; the second sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the second time unit set, and the downlink transmission of at least one time unit in each first time unit set The receiving situation is not successfully transmitted to the network device;

The sending module is configured to send the first information to the network device in the second time unit after the channel listening is successful.
The device according to claim 15, wherein the at least one first sub-information is at least one first HARQ-ACK codebook, and/or the second sub-information is a second HARQ-ACK codebook .
The device according to claim 15 or 16, wherein the downlink transmission and reception status of at least one time unit in the first time unit set is not successfully transmitted to the network device, comprising:

The terminal device failed to send the downlink transmission and reception status of at least one time unit in the first time unit set to the network device in the first time unit due to channel listening failure, and the first time unit is the network A time unit scheduled by the device for transmitting the downlink transmission and reception status of at least one time unit in the first time unit set; or,

The network device fails to parse the downlink transmission and reception status of at least one time unit in the first time unit set from the terminal device; or,

The network device instructs to delay the feedback of the downlink transmission reception situation on at least one time unit in the first time unit set.
The device according to any one of claims 15-17, wherein the terminal device further comprises:

The receiving module is configured to receive second information from the network device, where the second information includes at least one of the following:

First indication information, the total number of the at least one first sub-information and the second sub-information, and the information of the second time unit;

Wherein, the first indication information is used to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information.
The device according to any one of claims 15-17, wherein the first information further comprises: third sub-information, and the third sub-information includes at least one of the following:

The second indication information, the total number of the at least one first sub-information and the second sub-information, the status of the hybrid automatic repeat request process corresponding to the downlink transmission of at least one time unit in the at least one first time unit set Logo

The second indication information is used to indicate that the first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.
The device according to any one of claims 17-19, wherein the network device instructs to delay feedback of the downlink transmission and reception status on at least one time unit in the at least one first time unit set;

The processing module is further configured to determine, according to the processing capability of the terminal device, at least one time unit in the at least one first time unit set to be fed back on the downlink transmission reception situation.
The device according to claim 20, wherein the first time unit and the second time unit belong to different channel occupation times.
A network device, characterized in that, the network device includes:

The receiving module is configured to receive first information from the terminal device on a second time unit, where the first information includes: at least one first sub-information and second sub-information, and the at least one first sub-information is used to indicate The downlink transmission and reception status of at least one time unit in at least one first time unit set; the second sub-information is used to indicate the downlink transmission and reception status of at least one time unit in the second time unit set, each of the first time units The downlink transmission and reception status of at least one time unit in the unit set is not successfully transmitted to the network device;

The processing module is configured to obtain, according to the first information, the downlink transmission reception of at least one time unit in the at least one first time unit set, and the downlink transmission of at least one time unit in the second time unit set Reception.
The device according to claim 22, wherein the at least one first sub-information is at least one first HARQ-ACK codebook, and/or the second sub-information is a second HARQ-ACK codebook .
The device according to claim 22 or 23, wherein the unsuccessful transmission of downlink transmission and reception of at least one time unit in the first time unit set to the network device comprises:

The terminal device failed to send the first sub-information to the network device in the first time unit due to channel listening failure, and the first time unit is the set of first time units scheduled by the network device for transmitting the first time unit The time unit of at least one time unit in the downlink transmission and reception situation; or,

The network device fails to parse the first sub-information from the terminal device; or,

The network device instructs to delay the feedback of the downlink transmission reception situation on at least one time unit in the first time unit set.
The device according to any one of claims 22-24, wherein the network device further comprises:

The sending module is configured to send second information to the terminal device, where the second information includes at least one of the following:

First indication information, the total number of the at least one first sub-information and the second sub-information, and the information of the second time unit;

Wherein, the first indication information is used to instruct the terminal device to carry the downlink transmission and reception status of at least one time unit in the at least one first time unit set in the first information.
The device according to any one of claims 22-24, wherein the first information further comprises: third sub-information, and the third sub-information includes at least one of the following:

The second indication information, the total number of the at least one first sub-information and the second sub-information, the status of the hybrid automatic repeat request process corresponding to the downlink transmission of at least one time unit in the at least one first time unit set Logo

The second indication information is used to indicate that the first information carries the downlink transmission and reception status of at least one time unit in the at least one first time unit set.
The device according to any one of claims 24-26, wherein the network device instructs to delay feedback of the downlink transmission and reception status on at least one time unit in the at least one first time unit set;

The processing module is further configured to determine at least one time unit in the at least one first time unit set corresponding to the downlink transmission reception situation indicated in the first sub-information according to the processing capability of the terminal device.
The device according to claim 27, wherein the first time unit and the second time unit belong to different channel occupation times.
A communication device, characterized in that a computer program is stored on the communication device, and when the computer program is executed by the communication device, the communication method according to any one of claims 1 to 14 is implemented.
A computer-readable storage medium, characterized in that a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is executed, the computer program or instruction is executed as described in any one of claims 1 to 14 Methods.