CN111565093A

CN111565093A - Information transmission method, terminal equipment and network equipment

Info

Publication number: CN111565093A
Application number: CN201910116644.XA
Authority: CN
Inventors: 贾琼; 张佳胤; 吴霁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-14
Filing date: 2019-02-14
Publication date: 2020-08-21
Anticipated expiration: 2039-02-14
Also published as: WO2020164503A1; CN111565093B

Abstract

The embodiment of the application provides an information transmission method, terminal equipment and network equipment, wherein the method comprises the following steps: the terminal equipment generates first information, wherein the first information comprises: at least one first sub-message and a second sub-message, wherein the at least one first sub-message is used for indicating the downlink transmission and reception condition of at least one time unit in at least one first time unit set; the second sub-information is used for indicating the downlink transmission and reception condition of at least one time unit in the second time unit set, and the downlink transmission and reception condition of at least one time unit in each first time unit set is not successfully transmitted to the network equipment; and after the channel sensing is successful, the terminal equipment sends the first information to the network equipment in a second time unit. The information transmission method, the terminal device and the network device provided by the embodiment of the application are used for solving the technical problem of how to send the downlink-transmitted HARQ-ACK information which is not successfully fed back to the network device due to LBT failure by the terminal device.

Description

Information transmission method, terminal equipment and network equipment

Technical Field

The present disclosure relates to communications technologies, and in particular, to an information transmission method, a terminal device, and a network device.

Background

With the rapid development of wireless communication technology, spectrum resources are increasingly in short supply. In order to solve the problem of less available frequency domain resources of the licensed spectrum, a New Radio (NR) mobile communication system (for short, NR system) can completely operate on the unlicensed spectrum without depending on the assistance of the licensed spectrum. That is, the network device sends downlink transmissions (e.g., control information, traffic data) on the unlicensed spectrum, and the terminal device sends uplink transmissions (e.g., control information, traffic data) on the unlicensed spectrum. The above NR system operating in the unlicensed spectrum may be referred to as a new radio-unlicensed (NR-U) system.

In order to use the unlicensed spectrum together with other systems (e.g., communication systems of different operators, Wi-Fi networks, etc.), the transmitting device in the NR-U uses channel resources of the unlicensed spectrum using a Listen Before Talk (LBT) channel access mechanism. When it is determined that the channel is idle through the listening (i.e., when the channel listening is successful or the LBT is successful), the sending device may obtain the channel usage right and obtain the corresponding Channel Occupancy Time (COT).

Currently, in an NR system, a terminal device needs to perform HARQ feedback on downlink transmission through a Physical Uplink Control Channel (PUCCH) at a time indicated by a network device. However, in the NR-U system, LBT needs to be performed before the terminal device sends PUCCH, and due to uncertainty of LBT, the terminal device may not perform HARQ feedback according to the time indicated by the network device, which affects downlink transmission.

Disclosure of Invention

The embodiment of the application provides an information transmission method, terminal equipment and network equipment, and is used for solving the technical problem of how to send downlink-transmitted HARQ-ACK information which is not successfully fed back to the network equipment due to LBT failure by the terminal equipment.

In a first aspect, an embodiment of the present application provides an information transmission method, in which a terminal device may generate first information, where the first information includes: at least one first sub-message and a second sub-message, where the at least one first sub-message is used to indicate a downlink transmission reception condition of at least one time unit in at least one first time unit set; the second sub-information is used for indicating the downlink transmission and reception condition of at least one time unit in a second time unit set, and the downlink transmission and reception condition of at least one time unit in each first time unit set is not successfully transmitted to the network equipment; and after the channel interception is successful, the terminal equipment sends the first information to the network equipment in a second time unit.

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 reception condition of at least one time unit in the first time unit set to the network device includes: the terminal device does not send the downlink transmission and reception condition of at least one time unit in the first time unit set to the network device in a first time unit due to channel listening failure, wherein the first time unit is a time unit which is scheduled by the network device and used for transmitting the downlink transmission and reception condition of at least one time unit in the first time unit set; or, the network device does not successfully resolve a downlink transmission reception condition of at least one time unit in the first time unit set from the terminal device; or, the network device indicates to delay feedback of the downlink transmission reception condition in at least one time unit in the first time unit set.

In the method provided by this embodiment, after the LBT is successfully performed before the time unit scheduled by the network device for HARQ feedback by extending the semi-static HARQ-ACK codebook, the terminal device may send, to the network device, the first information including the HARQ-ACK information of the downlink transmission that needs to be fed back currently and 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 may timely know the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past, and the performance of downlink transmission is ensured.

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

the first mode is as follows: the terminal equipment carries HARQ-ACK information of downlink transmission which is not successfully transmitted to the network equipment in the past in the first information based on the indication of the network equipment.

In this implementation, the method further includes: the terminal equipment receives second information from the network equipment, wherein the second information comprises at least one of the following items: first indication information, a total number of the at least one first sub information and the second sub information, information of the second time unit; wherein the first indication information is used to indicate that the terminal device carries a downlink transmission reception condition of at least one time unit in the at least one first time unit set in the first information.

In this embodiment, the network device may indicate, through the second information, or implicitly, that the terminal device does not successfully receive the downlink transmission to the network device before re-feeding back the downlink transmission in the subsequent time unit, so that the terminal device may perform feedback after merging the time unit corresponding to the current time with the time unit that has not successfully fed back in the past. By the method, the alignment of the HARQ-ACK codebook between the network equipment and the terminal equipment can be effectively ensured, the problem that the HARQ process is always occupied and can not be released because the HARQ-ACK feedback can not be transmitted in time is avoided, and the system performance is finally improved.

The second mode is as follows: the terminal device autonomously carries the HARQ-ACK information of the downlink transmission which is not successfully transmitted to the network device in the past in the first information.

In this implementation, the first information further includes: third sub information, the third sub information including at least one of: second indication information, a total number of the at least one first sub-information and the second sub-information, and an identifier of a hybrid automatic repeat request process corresponding to 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 a downlink transmission reception condition of at least one time unit in the at least one first time unit set.

In this embodiment, the terminal device may autonomously merge the time unit that needs to be fed back at the current time with the time unit that has not been fed back successfully in the past, and indicate, to the network device through the third sub-information, that the terminal device carries the downlink transmission reception condition of at least one time unit in the at least one first time unit set in the first information. By the method, the alignment of the HARQ-ACK codebook between the network equipment and the terminal equipment can be effectively ensured, the problem that the HARQ process is always occupied and can not be released because the HARQ-ACK feedback can not be transmitted in time is avoided, and the system performance is finally improved.

As a possible implementation manner, the network device indicates to delay feedback of the downlink transmission reception situation in at least one time unit in the at least one first time unit set. Then in this scenario, the method further comprises: and the terminal equipment determines at least one time unit of the downlink transmission receiving condition to be fed back in the at least one first time unit set according to the processing capacity of the terminal equipment. The first time unit and the second time unit belong to different channel occupation times or belong to the same channel occupation time.

According to the method provided by the embodiment, when the network equipment indicates the HARQ feedback delay, the terminal equipment can dynamically expand the semi-static HARQ-ACK based on the processing capability of the terminal equipment, so that the problem of how to align the HARQ-ACK codebook between the network equipment and the terminal equipment can be effectively solved, the problem that the HARQ process is always occupied and cannot be released because the HARQ-ACK feedback cannot be transmitted in time is avoided, and the system performance is finally improved.

In a second aspect, an embodiment of the present application provides an information transmission method, in which a network device receives first information from a terminal device over a second time unit, where the first information includes: at least one first sub-message and a second sub-message, where the at least one first sub-message is used to indicate a downlink transmission reception condition of at least one time unit in at least one first time unit set; the second sub-information is used for indicating the downlink transmission and reception condition of at least one time unit in a second time unit set, and the downlink transmission and reception condition of at least one time unit in each first time unit set is not successfully transmitted to the network equipment; and the network equipment acquires the downlink transmission and reception condition of at least one time unit in the at least one first time unit set and the downlink transmission and reception condition of at least one time unit in the second time unit set according to the first information.

When the terminal device carries HARQ-ACK information of downlink transmission that has not been successfully transmitted to the network device in the past in the first information based on the indication of the network device, the method may further include: the network equipment sends second information to the terminal equipment, wherein the second information comprises at least one of the following items: first indication information, a total number of the at least one first sub information and the second sub information, information of the second time unit; wherein the first indication information is used to indicate that the terminal device carries a downlink transmission reception condition 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 HARQ-ACK information of downlink transmission that has not been successfully transmitted to the network device in the past in the first information, the first information may further include: third sub information, the third sub information including at least one of: second indication information, a total number of the at least one first sub-information and the second sub-information, and an identifier of a hybrid automatic repeat request process corresponding to 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 a downlink transmission reception condition of at least one time unit in the at least one first time unit set.

As a possible implementation manner, when the network device indicates to delay feedback of the downlink transmission reception condition in at least one time unit in the at least one first time unit set, the method may further include: and the network equipment determines at least one time unit in the at least one first time unit set corresponding to the downlink transmission receiving condition indicated in the first sub information according to the processing capability of the terminal equipment. 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 method provided by the second aspect and each possible implementation manner of the second aspect may refer to the beneficial effects brought by each possible implementation manner of the first aspect and the first aspect, which are not described herein again.

In a third aspect, an embodiment of the present application provides a terminal device, where the terminal device includes: the device comprises a processing module and a sending module; the processing module is configured to generate first information, where the first information includes: at least one first sub-message and a second sub-message, where the at least one first sub-message is used to indicate a downlink transmission reception condition of at least one time unit in at least one first time unit set; the second sub-information is used for indicating the downlink transmission and reception condition of at least one time unit in a second time unit set, and the downlink transmission and reception condition of at least one time unit in each first time unit set is not successfully transmitted to the network equipment; and the sending module is used for sending the first information to the network equipment in a second time unit after the channel interception is successful.

When the terminal device carries HARQ-ACK information of downlink transmission that has not been successfully transmitted to the network device in the past in the first information based on the indication of the network device, the terminal device may further include: a receiving module, configured to receive second information from the network device, where the second information includes at least one of the following: first indication information, a total number of the at least one first sub information and the second sub information, information of the second time unit; wherein the first indication information is used to indicate that the terminal device carries a downlink transmission reception condition 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 HARQ-ACK information of downlink transmission which has not been successfully transmitted to the network device in the past in the first information, the first information further includes: third sub information, the third sub information including at least one of: second indication information, a total number of the at least one first sub-information and the second sub-information, and an identifier of a hybrid automatic repeat request process corresponding to 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 a downlink transmission reception condition of at least one time unit in the at least one first time unit set.

As a possible implementation manner, the network device indicates to delay feedback of the downlink transmission reception situation in 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 of the downlink transmission reception condition to be fed back in the at least one first time unit set. 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 device provided by the third aspect and each possible implementation manner of the third aspect may refer to the beneficial effects brought by the first aspect and each possible implementation manner of the first aspect, and are not described herein again.

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

When the terminal device carries HARQ-ACK information of downlink transmission that has not been successfully transmitted to the network device in the past in the first information based on the indication of the network device, the network device further includes: a sending module, configured to send second information to the terminal device, where the second information includes at least one of the following: first indication information, a total number of the at least one first sub information and the second sub information, information of the second time unit; wherein the first indication information is used to indicate that the terminal device carries a downlink transmission reception condition 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 indicates to delay the feedback of the downlink transmission reception condition in at least one time unit of 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 of the at least one first time unit set corresponding to the downlink transmission reception condition indicated in the first sub information. 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 network device provided by the fourth aspect and each possible implementation manner of the fourth aspect may refer to the beneficial effects brought by the first aspect and each possible implementation manner of the first aspect, which are not described herein again.

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

wherein the memory is to store computer executable program code, the program code comprising instructions; when executed by a processor, the instructions cause the terminal device to perform the method as provided by the first aspect or possible embodiments of the first aspect.

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

wherein the memory is to store computer executable program code, the program code comprising instructions; when executed by a processor, cause the network device to perform a method as provided by the second aspect or possible embodiments of the second aspect.

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

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

In a ninth aspect, embodiments of the present application provide a computer program product comprising instructions, which when run on a computer, cause the computer to perform the method of the first aspect or the various possible implementations of the first aspect.

In a tenth aspect, embodiments of the present application provide a computer program product comprising instructions that, when executed on a computer, cause the computer to perform the method of the second aspect or the various possible implementations of the second aspect.

In an eleventh aspect, embodiments of the present application provide a computer-readable storage medium, which stores instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or the various possible implementations of the first aspect.

In a twelfth aspect, embodiments of the present application provide a computer-readable storage medium having stored therein instructions, which, when executed on a computer, cause the computer to perform the method of the second aspect or the various possible implementations of the second aspect.

In a thirteenth aspect, an embodiment of the present application provides a communication apparatus, where a computer program is stored on the communication apparatus, and when the computer program is executed by the communication apparatus, the method in the first aspect or various possible implementation manners of the first aspect is implemented. The communication device may be a chip, for example.

In a fourteenth aspect, embodiments of the present application provide a communication apparatus, where a computer program is stored on the communication apparatus, and when the computer program is executed by the communication apparatus, the method in the second aspect or various possible implementation manners of the second aspect is implemented. The communication device may be a chip, for example.

In a fifteenth aspect, a communication apparatus is provided, which may be the terminal device in the third aspect or various possible embodiments of the third aspect, or a chip provided in the terminal device. The communication device includes: a processor, coupled to the memory, operable to execute the instructions in the memory to implement the method of the first aspect or the various possible implementations of the first aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to 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 means is a chip provided in the terminal device, the communication interface may be an input/output interface.

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

In a sixteenth aspect, a communication apparatus is provided, which may be the network device in the fourth aspect or various possible embodiments of the fourth aspect, or a chip disposed in the network device. The communication device includes: a processor, coupled to the memory, is operable to execute the instructions in the memory to implement the method of the second aspect or the various possible embodiments of the second aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to 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 provided 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: network equipment and terminal equipment. The terminal device is configured to perform the method of the first aspect or various possible implementations of the first aspect. The network device is adapted to perform the method of the second aspect or of various possible embodiments of the second aspect.

In an eighteenth aspect, an embodiment of the present application provides a chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, so as to implement the method provided in any one of the first aspect to the second aspect or any one of the possible implementation manners of any one of the first aspect to the second aspect.

In a nineteenth aspect, the present application provides a chip, where the chip 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 any one of the first aspect to the second aspect or any one of the possible implementation manners of any one of the aspects.

According to the information transmission method, the terminal device and the network device, the terminal device can send the first information including the current HARQ-ACK information of the downlink transmission required to be fed back and the HARQ-ACK information of the downlink transmission which is not successfully transmitted to the network device in the past to the network device after the LBT is successfully executed before the time unit which is scheduled by the network device and used for carrying out the HARQ feedback in a mode of expanding the semi-static HARQ-ACK codebook, so that the network device can timely know the HARQ-ACK information of the downlink transmission which is not successfully transmitted to the network device in the past, and the performance of the downlink transmission is ensured.

Drawings

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

fig. 2 is a schematic flowchart of an information transmission method according to an embodiment of the present application;

fig. 3 is a first schematic diagram of a time domain resource according to an embodiment of the present application;

fig. 4 is a schematic diagram of a time domain resource according to an embodiment of the present application;

fig. 5 is a schematic diagram of a time domain resource provided in the embodiment of the present application;

fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

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

fig. 8 is a schematic structural diagram of another terminal device provided in an embodiment of the present application;

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

Detailed Description

Fig. 1 is a schematic architecture diagram of a mobile communication system to which an embodiment of the present application is applied. As shown in fig. 1, the mobile communication system may include a core network device 110, a radio access network device 120, and at least one terminal device (e.g., terminal device 130 and terminal device 140 in fig. 1). The terminal device is connected to the radio access network device 120 in a wireless manner, and the radio 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 may be separate physical devices, or the function of the core network device 110 and the logical function of the radio access network device 120 may be integrated on the same physical device, or a physical device in which the function of a part of the core network device 110 and the function of a part of the radio access network device 120 are integrated. The terminal equipment may be fixed or mobile. Fig. 1 is a schematic diagram, and the mobile communication system may further include other network devices, such as a wireless relay device and a wireless backhaul device, which are not shown in fig. 1. The embodiments of the present application do not limit the number of the core network device 110, the radio access network device 120, and the terminal device included in the mobile communication system.

The radio access network device 120 is an access device that the terminal device accesses to the mobile communication system in a wireless manner, and may be a base station NodeB, an evolved node b, a base station in a 5G mobile communication system or a new generation wireless (new radio, NR) communication system, a base station in a future mobile communication system, an access node in a WiFi system, and the like. In this embodiment, the radio access network device 120 is simply referred to as a network device, and if no special description is provided, in this embodiment, the network devices are all referred to as the radio access network devices 120. In addition, in the embodiments of the present application, the terms 5G and NR may be equivalent.

The Terminal device may also be referred to as a Terminal, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), and the like. The terminal device may be a mobile phone (mobile phone), a tablet (pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like.

The radio access network device 120 and the terminal device may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons and satellite vehicles. The application scenarios of the radio access network device 120 and the terminal device are not limited in the embodiments of the present application.

The radio access network device 120 and the terminal device may communicate via a licensed spectrum (licensed spectrum), may communicate via an unlicensed spectrum (unlicensed spectrum), or may communicate via both the licensed spectrum and the unlicensed spectrum. The radio access network device 120 and the terminal device may communicate with each other through a frequency spectrum of 6 gigahertz (GHz) or less, through a frequency spectrum of 6GHz or more, or through both a frequency spectrum of 6GHz or less and a frequency spectrum of 6GHz or more. The spectrum resource used between the radio access network device 120 and the terminal device is not limited in the embodiment of the present application. The embodiment of the application can be suitable for downlink transmission, and for the downlink transmission, the sending equipment is wireless access network equipment, and the corresponding receiving equipment is terminal equipment.

To facilitate an understanding of the embodiments of the present application, several definitions are introduced and described. Specifically, the method comprises the following steps:

hybrid automatic repeat request (HARQ): is a technique that combines forward error correction coding (FEC) and automatic repeat request (ARQ). Redundant information can be added to the transmitted data through FEC, and 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 erroneous. Meanwhile, in the detection process of the terminal equipment, a part of errors can be corrected through redundant information in the data, so that the number of times of data retransmission is reduced. If the terminal device detects that the data is correct (i.e., the CRC check is successful), the terminal device may send a positive Acknowledgement (ACK) to the network device to inform the network device that the data was received correctly. If the terminal device detects a data error (i.e., a CRC check fails), i.e., an error that cannot be corrected by the FEC, the terminal device may request the network device to retransmit the data through the ARQ mechanism. In particular, the terminal device may send a Negative Acknowledgement (NACK) to the network device to inform of the data reception failure. The network device retransmits the data upon receiving the NACK for the data. Wherein, the ACK and NACK may be collectively referred to as HARQ-ACK information. In some embodiments, the HARQ-ACK information may also be referred to as HARQ information, which is not distinguished or limited in the embodiments of the present application.

A Physical Uplink Control Channel (PUCCH) for carrying uplink control information (e.g., HARQ-ACK information).

A Physical Downlink Shared Channel (PDSCH) for carrying downlink transmission.

A Physical Downlink Control Channel (PDCCH) for carrying Downlink Control Information (DCI).

Taking the mobile communication system shown in fig. 1 as an NR mobile communication system (NR system for short) as an example, the NR system employs HARQ technology to perform automatic retransmission and combining decoding on data with errors in transmission, so as to ensure reliability of data transmission. For downlink transmission, the network device may instruct the terminal device at what time to perform HARQ feedback. I.e. at what time the reception of the downlink transmission (HARQ-ACK information) is fed back. Specifically, the method comprises the following steps:

if the terminal equipment receives the PDSCH dynamically scheduled or the P semi-statically scheduled in the slot n-kDSCH, the terminal device needs to perform HARQ feedback on the PDSCH in slot n. The value of k may be indicated by a PDSCH-to-HARQ-timing-indicator field in DCI, and the value range of the corresponding k may be {1,2,3,4,5,6,7,8 }. Alternatively, the value of k is determined by a dl-DataToUL-ACK field included in higher layer signaling (e.g., RRC signaling). It is to be understood that the letter k is used herein by way of illustration only and not by way of limitation, and may be otherwise stated in some embodiments. For example, in 3GPP protocol 38.213, with K₁To indicate that K is at this time₁The meaning of k is equivalent.

Taking the case that the value of k is indicated by DCI, since the k values indicated by DCI in different time slots may be different, DCI received by the terminal device 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 in different time slots on the same PUCCH.

For example, taking an example that the network device transmits DCI1 to the terminal device at slot1 and PDSCH1 to the terminal device at slot1, transmits DCI2 to the terminal device at slot2 and transmits PDSCH2 to the terminal device at slot2, assuming that the value of k indicated by DCI1 is 3 and the value of k indicated by DCI2 is 2, the terminal device needs to perform HARQ feedback on PDSCH1 received at slot1 at slot4 and HARQ feedback on PDSCH2 received at slot 2. In this example, the terminal device needs to feed back HARQ-ACK information for two PDSCHs at slot4, i.e. on one PUCCH, the terminal device needs to feed back HARQ-ACK information for PDSCH1 transmitted on slot1 and HARQ-ACK information for PDSCH2 transmitted on slot 2.

The set of HARQ-ACK information of all downlink transmissions transmitted by the terminal device on one PUCCH is referred to as a HARQ-ACK codebook (HARQ-ACK codebook). In R15, two HARQ-ACK codebook types 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 a semi-static HARQ-ACK codebook, in a PUCCH on slot n, a terminal device needs to feed back all possible PDSCH transmissions on slot n-K, where K belongs to K, where K is a set and corresponds to a value range of K. As mentioned above, the value range of k may be {1,2,3,4,5,6,7,8} preset, or indicated by DCI, or indicated by higher layer signaling. In actual transmission, if transmission is not scheduled in a corresponding slot n-k, the terminal device feeds back NACK. On the contrary, if downlink transmission is scheduled in a slot n-k, the terminal device feeds back ACK or NACK according to the actual receiving situation. That is, the semi-static HARQ-ACK codebook is used to indicate the reception of a downlink transmission that may exist on each slot in a set of slots. That is to say, when the DCI received by the terminal device at different times points to the same timeslot, the terminal device may feed back the reception conditions of the downlink transmissions that may exist at the multiple times in a semi-static HARQ-ACK codebook manner.

Illustratively, taking the size of the set of K as 3 as an example, that is, in the PUCCH on slot n, the terminal device needs to feed back all possible PDSCHs on slot n-1, slot n-2, and slot n-3. It is assumed that there is a PDSCH in each slot, and the PDSCH reception is as shown in table 1 below:

TABLE 1

Time slot	Whether or not there is PDSCH	PDSCH reception situation	Whether or not there is DCI	Value of k indicated by DCI
					slot n-3	Is that	ACK	Is provided with	3
slot n-2	Whether or not	Is free of	Is free of	-
					slot n-1	Is that	NACK	Is provided with	1

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

However, with the rapid development of wireless communication technology, spectrum resources are increasingly in short supply. In order to solve the problem of less available frequency domain resources of the licensed spectrum, the NR system may operate on the unlicensed spectrum completely without relying on the assistance of the licensed spectrum. That is, the network device sends downlink transmissions (e.g., control information and/or traffic data) on the unlicensed spectrum, and the terminal device sends uplink transmissions (e.g., control information and/or traffic data) on the unlicensed spectrum. In this embodiment, the above NR system operating in the unlicensed spectrum may be referred to as a new radio-unlicensed (NR-U) system.

In order to use the unlicensed spectrum in common with other systems (e.g., communication systems of different operators, Wi-Fi networks, etc.), a transmitting device in the NR-U system uses channel resources of the unlicensed spectrum using a Listen Before Talk (LBT) channel access mechanism. Specifically, the method comprises the following steps:

the transmitting device channel listens to the channel before transmitting the transmission. When it is determined that the channel is idle through the listening (i.e., when the channel listening is successful or the LBT is successful), the sending device may obtain the channel usage right and obtain the corresponding Channel Occupancy Time (COT). Within the COT, a transmitting device may access a channel directly or through a fast LBT mechanism to transmit control information and/or traffic data. When the channel is determined to be busy by listening (i.e., when channel listening fails or LBT fails), the transmitting device foregoes sending control information and/or traffic data to the receiving device on the channel. It is to be understood that the sending device may be a network device or a terminal device. Specifically, if the device initiating the LBT is a network device, the sending device is a network device, and the receiving device is a terminal device; if the device initiating the LBT is the terminal device, the sending device is the terminal device, and the receiving device is the network device.

Currently, there are two types of channel sensing:

the first-class channel sensing is channel sensing of a long sensing type, that is, when the sending device performs the first-class channel sensing, it takes a long time from the beginning of channel sensing to the success of channel sensing. In some embodiments, the first type of channel sensing may also be referred to as type1channel access. Currently, a common first-type channel sensing has a Clear Channel Assessment (CCA) based on random backoff.

The procedure for the transmitting device to perform CCA based on random backoff may be as follows: the transmitting device may uniformly and randomly generate a backoff counter N between 0 and an initial Contention Window (CWS), and perform channel sensing with a sensing slot (e.g., 9 μ s) as a granularity.

If the transmitting device detects that the channel is free within the listening slot, the backoff counter is decremented by 1. If the sending device detects that the channel is busy in the listening slot, the back-off counter is suspended and 1 is not decremented for the moment. That is, the value of the back-off counter remains unchanged during the busy time of the channel, and the back-off counter is not counted down again until the idle time of the channel is detected. In particular implementations, the transmitting device may compare the power on the channel received in the listening slot to a CCA-energy detection threshold (CCA-ED). If the power on the channel is higher than or equal to CCA-ED, the channel is determined to be busy, and if the power on the channel is lower than CCA-ED, the channel is determined to be idle.

When the backoff counter is zeroed, the transmitting device may determine that channel sensing was successful (which may also be referred to as LBT sensing successful). In this scenario, the transmitting device may immediately occupy the channel to transmit control information and/or traffic data. In some embodiments, the sending device may also wait for a period of time on its own after the back-off counter is zeroed. After waiting, the transmitting device may listen to the channel once more using an additional time slot (e.g., 9 μ s or 25 μ s +9 x k μ s, where k is zero or a positive integer). If the transmitting device senses that the channel is idle during the additional time slot, the transmitting device may determine that the channel sensing was successful. In this scenario, the transmitting device may immediately occupy the channel to transmit control information and/or traffic data.

If the sending device does not complete the back-off counter zeroing before the time domain resource that is desired to be occupied, or completes the back-off counter zeroing before the time domain resource that is desired to be occupied but senses that the channel is busy at the additional listening slot, the sending device may determine that the channel sensing fails (which may also be referred to as LBT sensing failure), at which point the sending device abandons sending control information and/or traffic data on the channel.

The second type of channel sensing is channel sensing of a short sensing type, that is, it takes a short time from the start of channel sensing to the success of channel sensing when the transmitting device performs the second type of channel sensing. In some embodiments, the second type of channel sensing may also be referred to as type 2channel access. Currently, the common second type of channel is sensed with a single slot CCA. In some embodiments, a single-slot CCA is also referred to as a single-shot (one shot) CCA or a 25 μ CCA.

The procedure for the transmitting device to perform the single-slot CCA may be as follows: the transmitting device performs a single-slot listening to the channel for a preset length of time (e.g., 25 mus). If the sending equipment detects that the channel is idle in the single time slot, the sending equipment determines that the channel sensing is successful. In this scenario, the transmitting device may immediately occupy the channel to transmit control information and/or traffic data. If the sending device detects that the channel is busy within the single slot, the sending device determines that channel sensing failed. In this scenario, the transmitting device foregoes transmitting control information and/or traffic data on the channel. In particular implementations, the transmitting device may compare the power on the channel received within the single time slot to the CCA-ED. If the power on the channel is higher than or equal to CCA-ED, the channel is determined to be busy, and if the power on the channel is lower than CCA-ED, the channel is determined to be idle.

It is to be understood that the second type of channel sensing may also be other channel sensing capable of rapidly sensing a channel, which is not limited herein. In addition, the listening duration of the second type channel listening is not limited to 25 μ s, and may also be a greater duration or a smaller duration, and the number of times of the second type channel listening is not limited to 1 time, and may also be 2 times, 3 times or a greater number, which is not specifically limited herein.

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

It can be understood that, when the sending device is a network device, the transmission performed within the corresponding channel occupation duration is downlink transmission; when the sending device is a terminal device, the transmission performed within the corresponding channel occupation duration is uplink transmission. Alternatively, the transmitting device may share the obtained channel usage right within the channel occupancy duration to other devices. For example, when the sending device is a network device, the network device may share the channel usage right to the terminal device, that is, allow the terminal device to transmit within the channel occupation duration. That is, in some embodiments, there may be a switch between uplink and downlink transmissions within a certain channel occupancy duration.

As described above, in the NR system, the terminal device needs to perform HARQ feedback on downlink transmission at the time indicated by the network device. However, in the NR-U system, LBT needs to be performed before the terminal device sends PUCCH, and due to uncertainty of LBT, the terminal device may not perform HARQ feedback according to the time indicated by the network device, which affects downlink transmission.

The embodiment of the application provides an information transmission method, when an NR-U system adopts a semi-static HARQ-ACK codebook based mode to perform HARQ feedback, a terminal device can dynamically expand a semi-static HARQ-ACK codebook so as to carry the HARQ-ACK information of downlink transmission which is not successfully transmitted to a network device in the past (for example, the HARQ-ACK information is unsuccessfully fed back due to LBT failure) in the current PUCCH for feedback, so that the network device can timely acquire the HARQ-ACK information of the downlink transmission which is unsuccessfully fed back before, the problem that the HARQ process is always occupied and can not be released due to the fact that the HARQ-ACK feedback can not be transmitted in time is avoided, and the downlink transmission performance of the system can be improved.

It should be understood that the method provided by the embodiment of the present application includes, but is not limited to, the aforementioned NR-U system, and may also be applied to other mobile communication systems, as long as there is an entity in the mobile communication system that needs to transmit data and transmit indication information of HARQ feedback corresponding to the data, and another entity needs to perform acknowledgement according to the indication information and transmit HARQ feedback information. Namely, the method can be applied to any mobile communication system which needs HARQ feedback. For example, a mobile communication system operating in a licensed spectrum (e.g., NR system, etc.), a mobile communication system relying on licensed spectrum assistance (e.g., LTE-a system, LAA system, etc.), and other mobile communication systems operating entirely in an unlicensed spectrum (e.g., LTE-U system, Wi-Fi network, etc.).

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

Before describing the embodiments of the present application, two concepts related to the embodiments of the present application will be described. Specifically, the method comprises the following steps:

a 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 and used for transmitting a downlink transmission reception condition of at least one time unit in a first "time unit set". That is, the first time unit is any resource that is scheduled by the network device and is independent of the first "time unit set", and the resource may be used to transmit the downlink transmission reception condition of at least one time unit in the first "time unit set". It should be understood that the first "time unit set" referred to herein may be a time unit set corresponding to a semi-static HARQ-ACK codebook, and in some embodiments, the first "time unit set" may be a set of ocseeds corresponding to a semi-static HARQ-ACK codebook. For example, the first time unit is slot n, and the first "set of time units" is slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1 }.

A 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 and used for transmitting a downlink transmission reception condition of at least one time unit in a second "time unit set". That is, the second time unit is any resource that is scheduled by the network device and is independent of the second "time unit set", and the resource may be used to transmit the downlink transmission reception condition of at least one time unit in the second "time unit set". It should be understood that the second "time unit set" referred to herein may be a set of time units corresponding to a semi-static HARQ-ACK codebook, and in some embodiments, the second "time unit set" may be a set of occases corresponding to a semi-static HARQ-ACK codebook.

Fig. 2 is a schematic flowchart of an information transmission method according to an embodiment of the present application. As shown in fig. 2, the method includes:

s101, the terminal equipment generates first information.

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

And S102, after the channel interception of the terminal equipment is successful, the terminal equipment sends the first information to the network equipment in a second time unit.

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

In this embodiment, when the network device schedules the terminal device to perform HARQ feedback on the PUCCH in 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 a downlink transmission reception condition of at least one time unit in the second time unit set, that is, HARQ-ACK information of downlink transmission that the PUCCH should feed back in the second time unit. The at least one first sub-information is used for indicating the downlink transmission reception condition of at least one time unit in the at least one first time unit set. And the downlink transmission receiving condition of at least one time unit in the at least one first time unit set is not successfully transmitted to the network equipment. That is, the first information includes HARQ-ACK information of downlink transmission that needs to be fed back currently, and HARQ-ACK information of downlink transmission that has not been successfully transmitted to the network device in the past. That is, the terminal device may dynamically extend the semi-static HARQ-ACK codebook to carry HARQ-ACK information for downlink transmissions that have not been successfully transmitted to the network device in the past (e.g., unsuccessful feedback due to LBT failure).

Therefore, 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 acquire the HARQ-ACK information which needs to be fed back currently through the first information and can also timely acquire the HARQ-ACK information which is not successfully transmitted to the network device in the past and is transmitted in the downlink, the problem that the HARQ process is always occupied and cannot be released due to the fact that the HARQ-ACK feedback cannot be transmitted in time is solved, and system performance can be improved.

A possible implementation manner that the downlink transmission reception condition of at least one time unit in the first time unit set is not successfully transmitted to the network device may include any one of the following:

the first item: the terminal device does not send the downlink transmission and reception condition of at least one time unit in the first time unit set to the network device in a first time unit due to LBT failure, where the first time unit is a time unit scheduled by the network device for transmitting the downlink transmission and reception condition of at least one time unit in the first time unit set;

the second term is: the network device unsuccessfully resolves a downlink transmission receiving condition of at least one time unit in the first time unit set from the terminal device;

the third item: the network equipment indicates to delay the feedback of the downlink transmission receiving condition on at least one time unit in the first time unit set.

It should be understood that, when the first information includes a plurality of first sub information, the reason why the reception condition 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 different.

For example, the first information may include first sub information 1, first sub information 2, and first sub information 3. The first sub information 1 is used to feed back a downlink transmission and reception condition of at least one time unit in the first time unit set 1, the first sub information 2 is used to feed back a downlink transmission and reception condition of at least one time unit in the first time unit set 2, and the first sub information 3 is used to feed back a downlink transmission and reception condition of at least one time unit in the first time unit set 3.

At this time, the reason why the downlink transmission reception condition 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 that the downlink transmission and reception condition 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 described above, and the reason that the downlink transmission and reception condition of at least one time unit in the first time unit set 3 is not successfully transmitted to the network device is the third item described above; or, the reason that the downlink transmission reception condition of at least one time unit in the first time unit set 1 is not successfully transmitted to the network device is the first item described above, the reason that the downlink transmission reception condition of at least one time unit in the first time unit set 2 is not successfully transmitted to the network device is the second item described above, and the reason that the downlink transmission reception condition of at least one time unit in the first time unit set 3 is not successfully transmitted to the network device is the third item described above; alternatively, the reasons why the downlink transmission reception condition 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 are the second item described above, and the like.

It should be understood that the time unit mentioned above may be a slot (slot), a mini-slot (mini-slot), a symbol (symbol), etc., and the present invention is not limited thereto.

The sizes of the first time unit set and the second time unit set may be the same, 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 and second sets of time units may be preset, or indicated by DCI, or indicated by higher layer signaling. Taking a time unit as a slot n as an example, the first time unit set and the second time unit set may be time unit sets corresponding to a semi-static codebook, for example, the slot n-K, K ∈ K described above.

For example, assuming that the second time unit is slot n, when the terminal device detects that the format of the DCI is 1_0, the corresponding second time unit set may be slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} for slot n. That is, when the terminal device performs HARQ-ACK feedback in slot n, it needs to perform HARQ-ACK feedback on all possible downlink transmissions in slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1 }. And if the downlink transmission is actually scheduled in the corresponding time unit and the feedback indicating the downlink transmission is located in slot n, the terminal equipment feeds back according to the actual receiving condition. And if the downlink transmission is not scheduled in the corresponding time unit, the terminal equipment feeds back NACK.

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

Taking a time unit as a time slot as an example, if there is no intersection between the time unit included in the first time unit set and the time unit included in the second time unit set, each piece of first sub information is an HARQ-ACK codebook (i.e., a first HARQ-ACK codebook), and correspondingly, the second sub information is also an HARQ-ACK codebook (i.e., a second HARQ-ACK codebook). At this time, the HARQ codebook fed back in the second time unit is a combination of the first HARQ-ACK codebook and the second HARQ-ACK codebook, and compared with the prior art in which the terminal device only feeds back the second HARQ-ACK codebook in the second time unit scheduled by the network device, the HARQ codebook fed back in the second time unit is a combination of the first HARQ-ACK codebook and the second HARQ-ACK codebook, which may be regarded as an extension of the first HARQ-ACK codebook, or may be regarded as an extension of the second HARQ-ACK codebook.

If the time units included in at least one first time unit set and the time units included in a second time unit set have an intersection, that is, include the same time unit, the terminal device may indicate, through any one of the at least one first sub information and the second sub information, a reception condition of a downlink transmission that may exist on the same time unit. At this time, each first sub-information is a first HARQ-ACK codebook, or the second sub-information is a second HARQ-ACK codebook, and is specifically related to which sub-information is used to indicate a reception situation of a downlink transmission that may exist in the same time unit.

For example, the first set of time units includes slots { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1}, and the second set of time units includes slots { 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 unit included in the first time unit set and the time unit included in the second time unit set, and therefore, the reception condition of the downlink transmission that may exist on each slot in slots { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} may be indicated by the first sub information, and the reception condition of the downlink transmission that may exist on each slot in slots { n +1, n +2, n +3, n +4, n +5, n +6, n +7, n +8} may be indicated by the second sub information. At this time, the first sub-information is a first HARQ-ACK codebook, and the second sub-information is a second HARQ-ACK codebook.

As another example, the first set of time units includes slots { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1}, and the second set of time units includes slots { n-4, n-3, n-2, n-1, n, n +1, n +2, n +3 }. In this example, there is an intersection slot { n-4, n-3, n-2, n-1} of the time cells included in the first set of time cells and the time cells included in the second set of time cells. And if the receiving condition of the downlink transmission possibly existing in the slot { n-4, n-3, n-2, n-1} is indicated through the first sub information and the receiving condition of the downlink transmission possibly existing in the slot { n-4, n-3, n-2, n-1} is not indicated through the second sub information, the first sub information is the first HARQ-ACK codebook. At this time, the second sub information is not a complete HARQ-ACK codebook, since the second sub information does not indicate the reception of the downlink transmission that may exist in all time units in the second time unit set. It can be understood that, at this time, the HARQ codebook fed back at the second time unit is a combination of the first HARQ-ACK codebook and the incomplete second HARQ-ACK codebook, and may be regarded as an extension of the first HARQ-ACK codebook. In addition, by this way, one piece of sub-information indicates the reception situation of the downlink transmission that may exist on the same time unit, the bit overhead can be reduced.

And if the receiving condition of the downlink transmission possibly existing in the slot { n-4, n-3, n-2, n-1} is indicated through the second sub information and the receiving condition of the downlink transmission possibly existing in the slot { n-4, n-3, n-2, n-1} is not indicated through the first sub information, the second sub information is the second HARQ-ACK codebook. At this time, since the first sub information does not indicate the reception of the downlink transmission that may exist in 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 at the second time unit is a combination of the second HARQ-ACK codebook and the incomplete first HARQ-ACK codebook, and may be regarded as an extension of the second HARQ-ACK codebook. In addition, by this way, one piece of 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 method provided by the embodiment of the present application is schematically illustrated by an example as follows:

fig. 3 is a schematic diagram of a time domain resource according to an embodiment of the present application. As shown in fig. 3, taking the first time unit as slot n and the second time unit as slot m as an example, the network device indicates the second time unit set and the first time unit set to the terminal device through a dl-datatoll-ACK field of RRC signaling. Assuming that the set indicated by the dl-DataToUL-ACK field is {7,5,3,2}, the first set of time units is slot { n-7, n-5, n-3, n-2}, and the second set of time units is slot { m-7, m-5, m-3, m-2 }.

In this embodiment, assuming that the terminal device fails to feed back the receiving condition of the downlink transmission of slot { n-7, n-5, n-3, n-2} to the network device at slot n, the terminal device may feed back the receiving condition of the downlink transmission of slot { n-7, n-5, n-3, n-2} to the network device through the first information when the network device schedules the terminal device to feed back the receiving condition of the downlink transmission of slot { m-7, m-5, m-3, m-2} at slot m.

It should be noted that, since slot n-3 and slot m-7 are the same time unit, in this scenario, the terminal device may indicate, through the first sub information or the second sub information, a reception situation of downlink transmission that may exist on the slot. Taking the first sub information indicating the receiving situation of the downlink transmission that may exist on the timeslot as an example, the first sub information is used to indicate the receiving situation of the downlink transmission of the slot { n-7, n-5, n-3, n-2}, and the second sub information is used to indicate the receiving situation of the downlink transmission of the slot { m-5, m-3, m-2 }. At this time, the first sub information is a complete HARQ-ACK codebook. It can be understood 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, and may be regarded as an extension of the first HARQ-ACK codebook.

By the mode of expanding the semi-static HARQ-ACK codebook, the network equipment can timely acquire the HARQ-ACK information of the downlink transmission which is not successfully transmitted to the network equipment in the past, and the performance of the downlink transmission is ensured.

It should be understood that, for the example shown in fig. 3, if the LBT of the terminal device is successful before slot n, that is, the terminal device feeds back the reception condition of the downlink transmission of slot { n-7, n-5, n-3, n-2} to the network device at slot n, when the subsequent network device schedules the terminal device to feed back the reception condition of the downlink transmission of slot { m-7, m-5, m-3, m-2} at slot m, since slot n-3 and slot m-7 are the same time unit, the terminal device may only feed back the reception condition of the downlink transmission of slot { m-5, m-3, m-2} at slot m, and does not need to feed back the reception condition of the downlink transmission of slot m-7 any more. In this way, the bit overhead of HARQ-ACK feedback may be reduced.

In the information transmission method provided in the embodiment of the present application, after the terminal device performs LBT successfully before the time unit scheduled by the network device for HARQ feedback by extending the semi-static HARQ-ACK codebook, the first information including the HARQ-ACK information of the downlink transmission that needs to be fed back currently and the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past may be sent to the network device, so that the network device may timely learn the HARQ-ACK information of the downlink transmission that was not successfully transmitted to the network device in the past, and the performance of downlink transmission is ensured.

When the reason why the downlink transmission reception condition of at least one time unit in the first time unit set is unsuccessfully transmitted to the network device is that the terminal device fails to transmit the downlink transmission reception condition of at least one time unit in the first time unit set to the network device due to LBT, or the network device unsuccessfully analyzes the downlink transmission reception condition of at least one time unit in the first time unit set from the terminal device, the terminal device may implement that the HARQ-ACK information of the downlink transmission unsuccessfully transmitted to the network device in the past is carried in the first information in the following two ways, specifically:

the first mode is as follows: the terminal equipment carries HARQ-ACK information of downlink transmission which is not successfully transmitted to the network equipment in the past in the first information based on the indication of the network equipment. That is, the terminal device extends the semi-static HARQ-ACK codebook based on the indication of the network device. The "HARQ-ACK information of downlink transmission that was not successfully transmitted to the network device in the past" referred to herein means that HARQ-ACK information of downlink transmission in a time unit before the second time unit where the current PUCCH is located is not successfully transmitted to the network device.

In this implementation, the method further comprises the steps of:

and the network equipment sends second information to the terminal equipment so as to indicate that the terminal equipment carries the downlink transmission receiving condition 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 new piece of information in the protocol, and may also be the existing DCI.

In one possible implementation, the second information may include at least one of: a total number M of the first indication information, the at least one first sub information, and the second sub information. Wherein the first indication information is used to indicate that the terminal device carries a downlink transmission reception condition of at least one time unit in the at least one first time unit set in the first information. It should be understood that M is the total number of all the first sub information plus the second sub information, i.e. the total number of all the first sub information plus 1.

Taking the example that the second information includes the first indication information, the first indication information may indicate, through 1-bit information, that the terminal device carries, in the first information, the downlink transmission reception condition of at least one time unit in the at least one first time unit set. Or, the first indication information may indicate, through a toggle bit (triggered bit), that the terminal device carries, in the first information, a downlink transmission reception condition of at least one time unit in the at least one first time unit set. It should be understood that, when the second information is the existing DCI, the DCI may implement the first indication information by multiplexing fields in the existing DCI 1_0 or DCI 1_1, or adding a new field.

Exemplarily, fig. 4 is a schematic diagram two of a time domain resource provided in the embodiment of the present application. As shown in FIG. 4, assume that the first set of time units is slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1}, the second set of time units 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, and the second time unit is slot m. Taking the second information as DCI as an example, assuming that HARQ-ACK feedback before slot n-8 is successfully transmitted to the network device, in one or more scheduling information from slot n-8 to slot n-1, the network device may indicate, through first indication information carried by DCI, that the terminal device does not need to carry past historical HARQ-ACK information. Taking the first indication information as 1-bit information as an example, the network device may indicate, by setting the first indication information to "0", that the terminal device does not need to carry past historical HARQ-ACK information when performing HARQ-ACK information feedback in slot n. In this scenario, the terminal device only needs to feed back the receiving situation of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} in slot.

Suppose that in slot n, the receiving condition of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} is not sent to the network device due to the LBT failure of the terminal device, or the terminal device sends the receiving condition of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} to the network device in slot n, but the network device cannot successfully analyze the fed back receiving condition of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1 }. In this scenario, the network device may indicate, in one or more scheduling information of subsequent slots m-3 to m-1, that the terminal device needs to carry past historical HARQ-ACK information through first indication information carried by the DCI. For example, the network device may set the first indication information to "1" to indicate that the terminal device needs to carry 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 may know that the receiving condition of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} needs to be fed back at the same time when performing HARQ feedback on slot m, that is, the receiving condition of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1, m-3, m-2, m-1} needs to be fed back on slot m.

It should be understood that, in the above example, the first indication information may also be set to "0" to indicate that the terminal device performs HARQ-ACK information feedback in slot m, and in this scenario, when the first indication information is set to "1" to indicate that the terminal device performs HARQ-ACK information feedback in slot n, it is not necessary to carry past historical HARQ-ACK information.

In some embodiments, the first indication information may also be indication information indicating other information to the terminal device, so as to implicitly indicate that the terminal device carries, in the first information, a downlink transmission reception condition of at least one time unit in the at least one first time unit set. For example, the first indication information may be indication information indicating a COT structure. It can be understood that the network device may also implicitly indicate, through other first indication information, that HARQ-ACK information that is unsuccessfully fed back historically needs to be fed back, which is not described in detail herein.

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 through M, the total number of the first time unit set and the second time unit set of the terminal device. The value of M is default to 1, that is, if M ═ 1, the value indicates that the second time unit only needs to feed back the reception condition of the downlink transmission of at least one time unit in the corresponding second time unit set, and if M >1, the value indicates that the reception condition of the downlink transmission of at least one time unit in the corresponding first time unit set is not successfully received on M-1 first time units before the second time unit

Illustratively, continuing with the example shown in FIG. 4, assuming that the reception of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} is not sent to the network device due to a LBT failure of the terminal device, or that the terminal device sends the reception of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} to the network device at slot n, but the network device fails to successfully resolve the reception of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} fed back, the network device may be in one or more of slot { n-3 to slot-1 And when the value of the DCI indication M is 2, the implicit indication terminal device needs to feed back the reception condition of the downlink transmission of at least one time unit in the first time unit set in addition to the reception condition of the downlink transmission of at least one time unit in the second time unit set. After the terminal device receives the DCI, the terminal device knows that the receiving condition of the downlink transmission of the slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1} fed back at the last time is not successfully sent to the network device through the value of M. Thus, when performing HARQ feedback on slot m, the terminal device needs to feed back the reception situation of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1}, that is, the reception situation of the downlink transmission of slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1, m-3, m-2, m-1} needs to be fed back on slot m.

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, through the first indication information, that the terminal device carries the downlink transmission and reception condition of at least one time unit in the at least one first time unit set in the first information, and further indicate, through M, that the terminal device needs to carry the downlink transmission and reception condition of at least one time unit in several first time unit sets.

According to the method provided by the embodiment of the application, in the unauthorized frequency band, the terminal equipment needs to carry out LBT before carrying out PUCCH transmission, and the uncertainty of the LBT causes that the terminal equipment possibly cannot access a channel to carry out PUCCH transmission. At this time, the network device may indicate, through the second information display or implicitly, that the terminal device unsuccessfully transmits the reception condition of the downlink transmission to the network device before re-feeding back in the subsequent time unit, so that the terminal device may perform feedback after merging the time unit corresponding to the current time with the time unit unsuccessfully fed back in the past. In some embodiments, it can also be said that the codebook corresponding to the current time and the codebook that has not been successfully fed back in the past are fed back together after being merged. By the method, the alignment of the HARQ-ACK codebook between the network equipment and the terminal equipment can be effectively ensured, the problem that the HARQ process is always occupied and can not be released because the HARQ-ACK feedback can not be transmitted in time is avoided, and the system performance is finally improved.

The second mode is as follows: the terminal device autonomously carries the HARQ-ACK information of the downlink transmission which is not successfully transmitted to the network device in the past in the first information. Namely, 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" referred to herein means that HARQ-ACK information of downlink transmission in a 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: the third sub-information indicates, to the network device, that the terminal device carries, in the first information, the downlink transmission reception condition of at least one time unit in the at least one first time unit set through the third sub-information.

A possible implementation manner, the third sub information includes at least one of: second indication information, a total number of the at least one first sub information and the second sub information, and an identifier (e.g., HARQ ID) of HARQ corresponding to 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 a downlink transmission reception condition of at least one time unit in the at least one first time unit set.

Taking the example that the third sub-information includes the second indication information, after the network device receives the first information sent by the terminal device, the network device may learn, through the third sub-information, that the terminal device carries, in the first information, the downlink transmission reception condition of at least one time unit in the at least one first time unit set in addition to the downlink transmission reception condition of at least one time unit in the second time unit set. It should be understood that, for how the second indication information indicates that the first information carries the downlink transmission reception situation of at least one time unit in the at least one first time unit set, reference may be made to the description of the first indication information in the foregoing, and implementation manners thereof are similar and are not described again here.

Taking the third sub information as an example that the third sub information includes the total number M of the at least one first sub information and the second sub information, after the network device receives the first information sent by the terminal device, the network device may obtain, through the M, that the terminal device carries, in the first information, the downlink transmission reception condition of the at least one time unit in the at least one first time unit set in addition to the second time unit set, and the number of the first time unit sets. By the method, the downlink transmission receiving condition of at least one time unit in several first time unit sets carried by the terminal equipment can be accurately indicated.

Taking the example that 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, after the network device receives the first information sent by the terminal device, the network device may reversely deduce that the downlink transmission corresponding to the HARQ identifier belongs to the at least one first time unit through the HARQ identifier corresponding to the downlink transmission of the at least one time unit in the at least one first time unit set included in the third sub-information, so that it can be known that the downlink transmission reception condition of the at least one time unit in the at least one first time unit set is also carried in the first information in addition to the second time unit set.

It should be understood that, although the above example takes any one of the third sub-information including the second indication information, the total number of the at least one first sub-information and the second sub-information, and the identifier of the HARQ corresponding to the downlink transmission of the at least one time unit in the at least one first time unit set as an example, how the third sub-information indicates to the network device that the terminal device carries the downlink transmission reception situation of the at least one time unit in the at least one first time unit set in the first information is described. However, those skilled in the art may understand that the third sub information may also indicate, by carrying the at least two items, that the terminal device carries, in the first information, a downlink transmission reception situation of at least one time unit in the at least one first time unit set, which is similar in implementation manner and is not described again here.

According to the method provided by the embodiment of the application, in the unauthorized frequency band, the terminal equipment needs to carry out LBT before carrying out PUCCH transmission, and the uncertainty of the LBT causes that the terminal equipment possibly cannot access a channel to carry out PUCCH transmission. At this time, the terminal device may autonomously merge the time unit that needs to be fed back at the current time with the time unit that has not been fed back successfully in the past, and indicate, to the network device through the third sub-information, that the terminal device carries the downlink transmission reception condition of at least one time unit in the at least one first time unit set in the first information. By the method, the alignment of the HARQ-ACK codebook between the network equipment and the terminal equipment can be effectively ensured, the problem that the HARQ process is always occupied and can not be released because the HARQ-ACK feedback can not be transmitted in time is avoided, and the system performance is finally improved.

As mentioned above, the sending device may share the obtained channel usage right in the channel occupancy duration to other devices, for example, when the sending device is a network device, the network device may share the channel usage right to the terminal device, that is, the terminal device is allowed to transmit in the channel occupancy duration. Therefore, as a possible implementation manner, in order to ensure that the HARQ-ACK feedback can be transmitted in time, the network device may instruct the terminal device to perform HARQ-ACK feedback within the COT of the network device as much as possible through scheduling, and at this time, the terminal device may directly access the channel or access the channel through a fast LBT mechanism (for example, the aforementioned second type of channel sensing), so as to send the HARQ-ACK feedback. For downlink transmission at the end of the COT, the terminal device cannot perform HARQ-ACK feedback in the current COT, and at this time, the network device may further instruct the terminal device to delay the corresponding HARQ-ACK feedback.

When the reason why the downlink transmission and reception condition of at least one time unit in the first time unit set is unsuccessfully transmitted to the network device is that the network device indicates to delay and feed back the downlink transmission and reception condition of at least one time unit in the first time unit set, the terminal device may implement that the HARQ-ACK information of the downlink transmission unsuccessfully transmitted to the network device in the past is carried in the first information in the following two ways, specifically:

the first mode is as follows: and the terminal equipment carries the HARQ-ACK information of the delayed feedback downlink transmission in the first information based on the indication of the network equipment.

Fig. 5 is a third schematic diagram of a time domain resource according to an embodiment of the present application. As shown in fig. 5, for downlink transmission belonging to the end of the first COT, due to a problem of processing capability of the terminal device (e.g., processing delay, scheduling delay, etc.), feedback cannot be performed in the first COT. At this time, the network device may indicate that HARQ-ACK feedback corresponding to downlink transmission at the end of the first COT of the terminal device needs to be delayed for feedback. For example, the network device may instruct to delay feedback of HARQ-ACK information corresponding to downlink transmission at the end of the first COT through the DCI. For example, the network device may indicate the terminal device by carrying 1-bit information in the scheduling information DCI of the downlink transmission at the end of the first COT, where HARQ feedback corresponding to the downlink transmission needs to be delayed. Or, the network device uses the PDSCH-to-HARQ-timing-indicator field in the downlink scheduling information to indicate that the HARQ feedback corresponding to the downlink transmission needs to be delayed by indicating a special value (for example, 0, or X, or an invalid value, etc.). Accordingly, when the terminal device receives the indication of the special value in the downlink scheduling information, it can know 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, so as to indicate, through the second information, that the terminal device carries, in the first information, HARQ-ACK information of downlink transmission at the end of the first COT that is fed back in a postponed manner. It should be understood that the second information mentioned here may be, for example, a new piece of information in the protocol, an existing DCI, or a new DCI format.

In a possible implementation manner, the second information may include information of the second time unit, so as to indicate, through the information of the second time unit, an actual transmission time position of HARQ feedback corresponding to downlink transmission in the first COT by the terminal device, and indirectly indicate, in the first information, HARQ-ACK information of downlink transmission at an end of the first COT where feedback is postponed before the terminal device is carried. It should be understood that the information of the second time unit carried by the second information may be an absolute time position, that is, an absolute time position indicating that the HARQ feedback corresponding to the downlink transmission is located in the first COT, or a relative time offset, that is, a time offset indicating between the time position indicating that the HARQ feedback corresponding to the downlink transmission is located in the first COT and the second time unit. Based on the second information, the terminal device may obtain the real time position of HARQ feedback corresponding to downlink transmission in the first COT.

Or, the second information may include the first indication information, so as to indicate, by the first indication information, that the terminal device carries HARQ-ACK information of downlink transmission at the end of the first COT where the feedback is postponed before the terminal device carries in the first information. The first indication information may indicate, through 1-bit information, that the terminal device carries HARQ-ACK information of downlink transmission at the end of the first COT where feedback is postponed before the terminal device carries in the first information. Or, the first indication information may indicate, through a toggle bit (toggled bit), that the terminal device carries, in the first information, HARQ-ACK information of downlink transmission at the end of the first COT that is fed back in a postponed manner.

In some embodiments, the first indication information may also be indication information indicating other information to a terminal device, so as to implicitly indicate HARQ-ACK information of downlink transmission at an end of a first COT where the terminal device carries a deferral feedback before the terminal device carries the first information. For example, the first indication information may be indication information indicating a COT structure. It can be understood that the network device may also implicitly indicate, by using other first indication information, HARQ-ACK information of downlink transmission at the end of the first COT where the terminal device carries the deferral feedback in the first information.

Or, the second information may include the total number M of the at least one piece of first sub information and the second sub information, so as to implicitly indicate, by M, to a terminal device, that the terminal device carries HARQ-ACK information of downlink transmission at the end of a first COT with a delay feedback before the terminal device carries in the first information.

It should be understood that the network device may further implement HARQ-ACK information indicating downlink transmission at the end of the first COT where the terminal device carries the deferred feedback before the second information, in a manner that the second information carries at least one of the aforementioned first indication information, the total number of the at least one first sub-information and the second sub-information, the information of the second time unit, and the like.

In this embodiment, the dynamic extension 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 HARQ feedback that, for downlink transmission received at the first time N, the terminal device may respond at the time corresponding to the time offset by N second times from the first time N at the fastest speed. For convenience of description, the processing capability of the terminal device is referred to by the size of N. 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 may be one of symbol, slot, mini-slot micro slot, and the like, or may be an absolute time length, such as one of time of second, millisecond, microsecond, and the like, which is not limited in the embodiment of the present application.

In this embodiment, before the terminal device generates the first information, at least one time unit to be fed back the downlink transmission reception condition in the at least one first time unit set may be determined according to the processing capability of the terminal device.

The following is illustrated by way of an example:

continuing with the example shown in fig. 5, it is assumed that the processing capability of the terminal device is N-3 (the time granularity is slot), that is, the terminal device needs to use a duration of 3 slots to process one downlink transmission. For PUCCH1 (which is assumed to correspond 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 whether downlink transmission exists in each slot is shown in the following table 2:

TABLE 2

Time slot	Whether or not there is downlink transmission	Whether or not there is DCI	Value of k indicated by DCI
				slot n-8	Is free of	Is free of	-
slot n-7	Is free of	Is free of	-
				slot n-6	Is free of	Is free of	-
slot n-5	Is that	Is that	5
				slot n-4	Is that	Is that	4
slot n-3	Is free of	Is free of	-
				slot n-2	Is that	Is that	X
slot n-1	Is that	Is that	X

Based on table 2 above, for PUCCH1 (assuming slot n is corresponded), the terminal device may carry HARQ feedback corresponding to downlink transmission before slot n-2 (including slot n-3) on PUCCH 1. Under the influence of the processing capability of the terminal device, the terminal device cannot complete the processing of downlink transmission on slot n-2 and slot n-1 before slot n, and therefore, the reception condition of the downlink transmission on slot n-2 and slot n-1 cannot be fed back on the PUCCH 1.

Assuming that the PUCCH1 is located at the tail of the COT1, in order to improve the success rate of accessing the channel by the terminal device as much as possible, the network device may instruct the terminal device to delay HARQ feedback corresponding to slot n-2 and slot n-1 downlink transmissions through two steps of instructions. For example, the network device sets PDSCH-to-HARQ-timing-indicator fields in downlink DCI corresponding to slot n-2 and slot n-1 downlink transmissions to special values (e.g., 0, or X, or invalid values, etc.) to respectively indicate HARQ feedback corresponding to slot n-2 and slot n-1 downlink transmissions for delaying. Table 2 shows an example in which a specific value is X.

After the network device successfully obtains the channel occupancy time COT2 through LBT, the terminal device may be further instructed to transmit HARQ feedback corresponding to slot n-2 and slot n-1 downlink transmission on PUCCH2 (assuming corresponding slot m). Illustratively, the network device may send downlink DCI to the terminal device when the channel is successfully accessed and the COT2 is obtained, indicating that the terminal device needs to feed back HARQ information delayed from the COT1 on the PUCCH 2. For a way of indicating that the terminal device needs to feed back the HARQ information delayed from the COT1 on the PUCCH2, the downlink DCI may refer to the foregoing description. It should be appreciated that in the semi-static codebook corresponding to PUCCH1, NACK is fed back for the reception of slot n-2 and slot n-1 downlink transmissions indicating feedback delays.

Assume that the first set of time units 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 perform HARQ-ACK feedback on all possible downlink transmissions in slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1 }. If transmission is actually scheduled in the corresponding time unit and the HARQ feedback of the transmission is indicated to be located in slot n, the terminal equipment feeds back according to the actual receiving condition, otherwise, the terminal equipment feeds back NACK. As shown in fig. 5, in slot { n-8, n-7, n-6, n-5, n-4, n-3, n-2, n-1}, only slot n-5 and slot n-4 schedule downlink transmission, and the indicated HARQ feedback is located on PUCCH1 on slot n. For slot n-2 and slot n-1, although downlink transmission is scheduled, the network device indicates that 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 HARQ information that needs to be fed back on COT1 on PUCCH2 with a delay, that is, the terminal device needs to carry the reception situation of the downlink transmission that has been fed back with the delay in addition to the HARQ feedback on the second time unit set originally corresponding to PUCCH 2. In this case, the first information on the PUCCH2 includes first sub-information indicating the reception of the downlink transmission of the previous delayed feedback. Therefore, the terminal device needs to determine at least one time unit of the downlink transmission receiving condition to be fed back in the at least one first time unit set according to the processing capability of the terminal device. Optionally, the network device may indicate a size of the first set of time units. Or a maximum value of the size of the first set of time units is protocol specified.

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 situation of the downlink transmission of 2 time units in the first time unit set through the first sub information. That is, the reception of the downlink transmission for slot { n-2, n-1} in the first set of time units. For PUCCH2, the corresponding second set of time units 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 uplink transmission unit, so slot m-8, i.e., slot { m-7, m-6, m-5, m-4, m-3, m-2, m-1} should be excluded from the second set of time units. That is, the receiving situation of the downlink transmission of at least one time unit in 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. It should be understood that "+" as used herein may be understood as a concatenation addition of two sets, or as a union set.

It should be noted that the example shown in fig. 5 is only for illustrating how to feed back the reception situation of the downlink transmissions of slot n-2 and slot n-1 located at the tail of COT1, and downlink transmissions exist for which time units in slot { m-7, m-6, m-5, m-4, m-3, m-2, m-1}, and the value of k indicated by DCI in these time units is not illustrated again.

The second mode is as follows: 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 a two-step scheduling HARQ feedback method, but only indicates the delay of HARQ feedback. And the terminal equipment autonomously carries the feedback indicating that the delay is required to be delayed in the current feedback in the subsequent transmission. In a specific implementation, the terminal device may determine, according to the processing capability of the terminal device, at least one time unit of the downlink transmission reception condition to be fed back in the at least one first time unit set, and indicate, by the first sub information, a downlink transmission reception condition that may exist in the at least one time unit.

In this scenario, the first information may further include: the third sub-information indicates, to the network device, that the terminal device carries, in the first information, the downlink transmission reception condition of at least one time unit in the at least one first time unit set through the third sub-information. I.e. the reception of the downlink transmission with the previously indicated delay feedback.

As to how the terminal device indicates through the third sub-information, reference may be made to the foregoing description about the third sub-information, which is not described again.

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 of the previous delayed feedback 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 and reception condition indicated in the first sub information, and a specific implementation manner of how the terminal device determines, according to the capability of the terminal device, at least one time unit in the at least one first time unit set corresponding to the downlink transmission and reception condition indicated in the first sub information is similar to that of how the terminal device determines, according to the capability of the terminal device, the at least one time unit in the at least one first time unit set corresponding to the downlink transmission and reception condition indicated.

The method provided by the embodiment of the application effectively solves the problem that how to align the HARQ-ACK codebook between the network equipment and the terminal equipment can be effectively ensured when two-step scheduling HARQ feedback (namely one scheduling indication delays the receiving condition of the downlink transmission and one scheduling indication delays the receiving condition of the downlink transmission (namely second information)) is adopted under the scene of the unauthorized frequency band or the HARQ feedback is indicated to be delayed, and avoids the problem that the HARQ process is always occupied and cannot be released because the HARQ-ACK feedback cannot be transmitted in time, and finally the system performance is improved.

It should be understood that, although the above examples all take the case that the first time unit and the second time unit belong to different COTs, the method of the embodiment of the present application is described and introduced. However, it can be understood by those skilled in the art that the method embodiment may also be applicable to a case where the first time unit and the second time unit are located in one COT, and are not described herein again.

In addition, in the embodiment of the present application, the method provided by the embodiment of the present application is described and introduced by taking the example that the first information includes at least one first sub-information and at least one second sub-information. The distribution of the at least one first sub information and the at least one second sub information in the first information is not limited. For example, the at least one 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 indicates ACK, 0 indicates 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}.

According to the information transmission method provided by the embodiment of the application, after the LBT is successfully executed before the time unit for HARQ feedback scheduled by the network equipment by the terminal equipment in a manner of expanding the semi-static HARQ-ACK codebook, the first information including the HARQ-ACK information of the current downlink transmission required to be fed back and the HARQ-ACK information of the downlink transmission which is not successfully transmitted to the network equipment in the past can be sent to the network equipment, so that the network equipment can timely acquire the HARQ-ACK information of the downlink transmission which is not successfully transmitted to the network equipment in the past, the problem that the HARQ process is always occupied and cannot be released due to the fact that the HARQ-ACK feedback cannot be transmitted in time is solved, and the performance of the downlink transmission of a system can be improved.

Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 6, the terminal device may include: a processing module 11 and a sending module 12. Wherein,

a processing module 11, configured to generate first information, where the first information includes: at least one first sub-message and a second sub-message, where the at least one first sub-message is used to indicate a downlink transmission reception condition of at least one time unit in at least one first time unit set; the second sub-information is used for indicating the downlink transmission and reception condition of at least one time unit in a second time unit set, and the downlink transmission and reception condition of at least one time unit in each first time unit set is not successfully transmitted to the network equipment; in a possible embodiment, 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.

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

It should be understood that the unsuccessful transmission of the downlink transmission reception condition of at least one time unit in the first time unit set to the network device may include: the terminal device does not send the downlink transmission and reception condition of at least one time unit in the first time unit set to the network device in a first time unit due to channel listening failure, wherein the first time unit is a time unit which is scheduled by the network device and used for transmitting the downlink transmission and reception condition of at least one time unit in the first time unit set; or, the network device does not successfully resolve a downlink transmission reception condition of at least one time unit in the first time unit set from the terminal device; or, the network device indicates to delay feedback of the downlink transmission reception condition in at least one time unit in the first time unit set.

With continuing reference to fig. 6, in one possible implementation, 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, where the second information includes at least one of the following: first indication information, a total number of the at least one first sub information and the second sub information, information of the second time unit; the first indication information is used to indicate that the terminal device carries the downlink transmission reception condition of at least one time unit in the at least one first time unit set in the first information.

Or, the first information further includes: third sub information, the third sub information including at least one of: second indication information, a total number of the at least one first sub-information and the second sub-information, and an identifier of a hybrid automatic repeat request process corresponding to 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 a downlink transmission reception condition of at least one time unit in the at least one first time unit set.

In a possible embodiment, the network device indicates to delay feedback of the downlink transmission reception condition in at least one time unit in the at least one first time unit set; the processing module 11 is further configured to determine, according to the processing capability of the terminal device, at least one time unit of the downlink transmission reception condition to be fed back in the at least one first time unit set. 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 may execute the actions of the terminal device in the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in fig. 7, the network device may include: a receiving module 21 and a processing module 22. Wherein,

a receiving module 21, configured to receive first information from a terminal device over a second time unit, where the first information includes: at least one first sub-message and a second sub-message, where the at least one first sub-message is used to indicate a downlink transmission reception condition of at least one time unit in at least one first time unit set; the second sub-information is used for indicating the downlink transmission and reception condition of at least one time unit in a second time unit set, and the downlink transmission and reception condition of at least one time unit in each first time unit set is not successfully transmitted to the network equipment; in a possible embodiment, 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.

A processing module 22, configured to obtain, according to the first information, a downlink transmission and reception condition of at least one time unit in the at least one first time unit set and a downlink transmission and reception condition of at least one time unit in the second time unit set.

With continuing reference to fig. 7, in one possible implementation, the network device may further include: a sending module 23; the sending module 23 is configured to send second information to the terminal device, where the second information includes at least one of the following: first indication information, a total number of the at least one first sub information and the second sub information, information of the second time unit; the first indication information is used to indicate that the terminal device carries the downlink transmission reception condition of at least one time unit in the at least one first time unit set in the first information.

In a possible embodiment, the network device indicates to delay feedback of the downlink transmission reception condition in at least one time unit in the at least one first time unit set; the processing module 22 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 corresponding to the downlink transmission reception condition indicated in the first sub information. 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 may perform the actions of the network device in the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

It should be noted that the above sending module may be a sender when actually implemented, and the receiving module may be a receiver when actually implemented. The processing module can be realized in the form of software called by the processing element; or may be implemented in hardware. For example, the processing module may be a processing element that is set up separately, or may be implemented by being integrated into a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a function of the processing module may be called and executed by a processing element of the apparatus. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above modules are implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).

Fig. 8 is a schematic structural diagram of another terminal device provided in the embodiment of the present application. As shown in fig. 8, the terminal device may include: a processor 31 (e.g., CPU), a memory 32, a receiver 33, a transmitter 34; both the receiver 33 and the transmitter 34 are coupled to the processor 31, the processor 31 controlling the receiving action of the receiver 33, the processor 31 controlling the transmitting action of the transmitter 34; the memory 32 may include a random-access memory (RAM) and may further include a non-volatile memory (NVM), such as at least one disk memory, and the memory 32 may store various instructions for performing various processing functions and implementing the method steps of the present application. Optionally, the terminal device related to 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 separate transceiving antennas on the terminal device. The communication bus 36 is used to implement communication connections between the elements. The communication port 37 is used for realizing connection and communication between the terminal device and other peripherals.

In the embodiment of the present application, the memory 32 is used for storing computer executable program codes, and the program codes comprise instructions; when the processor 31 executes the instruction, the instruction causes the processor 31 of the terminal device to execute the processing action of the terminal device in the foregoing method embodiment, cause the receiver 33 to execute the receiving action of the terminal device in the foregoing method embodiment, and cause the transmitter 34 to execute the transmitting action of the terminal device in the foregoing method embodiment, which has similar implementation principles and technical effects, and is not described again here.

Fig. 9 is a schematic structural diagram of another network device according to an embodiment of the present application. As shown in fig. 9, the network device may include: a processor 41 (e.g., CPU), a memory 42, a receiver 43, a transmitter 44; both the receiver 43 and the transmitter 44 are coupled to the processor 41, the processor 41 controlling the receiving action of the receiver 43, the processor 41 controlling the transmitting action of the transmitter 44; the memory 42 may comprise a high-speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored for performing various processing functions and implementing the method steps of the present application. Optionally, the network device related to 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 a transceiver of the network device or may be separate transceiving antennas on the network device. The communication bus 46 is used to enable communication connections between the elements. The communication port 47 is used for implementing connection communication between the network device and other peripherals.

In the present application, the memory 42 is used for storing computer executable program code, which includes instructions; when the processor 41 executes the instructions, the instructions cause the processor 41 of the network device to execute the processing actions of the network device in the foregoing method embodiment, cause the receiver 43 to execute the receiving actions of the network device in the foregoing method embodiment, and cause the transmitter 44 to execute the transmitting actions of the network device in the foregoing method embodiment, which implement similar principles and technical effects, and are not described herein again.

The embodiment of the application provides a communication device. The communication device may be the terminal device in the above method embodiment, or may be a chip provided in the terminal device. The communication device includes: a processor, coupled to the memory, may be configured to execute the instructions in the memory to implement the methods of the various possible embodiments described above. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

The embodiment of the present application provides a communication apparatus, which may be the network device in the foregoing method embodiment, or a chip disposed in the network device. The communication device includes: a processor, coupled to the memory, may be configured to execute the instructions in the memory to implement the methods of the various possible embodiments described above. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

An embodiment of the present application provides a communication system, including: network equipment and terminal equipment. The terminal device is configured to perform the methods in the various possible embodiments described above. The network device is configured to perform the methods of the various possible embodiments described above.

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

The embodiment of the present application provides a chip, where the chip 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 foregoing embodiment.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The term "plurality" herein means two or more. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application.

It should be understood that, in the embodiment of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.

Claims

1. An information transmission method, characterized in that the method comprises:

the terminal equipment generates first information, wherein the first information comprises: at least one first sub-message and a second sub-message, where the at least one first sub-message is used to indicate a downlink transmission reception condition of at least one time unit in at least one first time unit set; the second sub-information is used for indicating the downlink transmission and reception condition of at least one time unit in a second time unit set, and the downlink transmission and reception condition of at least one time unit in each first time unit set is not successfully transmitted to the network equipment;

and after the channel interception is successful, the terminal equipment sends the first information to the network equipment in a second time unit.

2. The method as claimed in 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.

3. The method according to claim 1 or 2, wherein the unsuccessful transmission of the downlink transmission reception condition of at least one time unit in the first time unit set to the network device comprises:

the terminal device does not send the downlink transmission and reception condition of at least one time unit in the first time unit set to the network device in a first time unit due to channel listening failure, wherein the first time unit is a time unit which is scheduled by the network device and used for transmitting the downlink transmission and reception condition of at least one time unit in the first time unit set; or,

the network device unsuccessfully resolves a downlink transmission receiving condition of at least one time unit in the first time unit set from the terminal device; or,

the network equipment indicates to delay the feedback of the downlink transmission receiving condition on at least one time unit in the first time unit set.

4. The method according to any one of claims 1-3, further comprising:

the terminal equipment receives second information from the network equipment, wherein the second information comprises at least one of the following items:

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

wherein the first indication information is used to indicate that the terminal device carries a downlink transmission reception condition of at least one time unit in the at least one first time unit set in the first information.

5. The method of any of claims 1-3, wherein the first information further comprises: third sub information, the third sub information including at least one of:

second indication information, a total number of the at least one first sub-information and the second sub-information, and an identifier of a hybrid automatic repeat request process corresponding to 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 a downlink transmission reception condition of at least one time unit in the at least one first time unit set.

6. The method according to any of claims 3-5, wherein the network device indicates delayed feedback of downlink transmission reception in at least one time unit of the at least one first set of time units, the method further comprising:

and the terminal equipment determines at least one time unit of the downlink transmission receiving condition to be fed back in the at least one first time unit set according to the processing capacity of the terminal equipment.

7. The method of claim 6, wherein the first time unit and the second time unit belong to different channel occupancy times.

8. An information transmission method, characterized in that the method comprises:

the network equipment receives first information from the terminal equipment on a second time unit, wherein the first information comprises: at least one first sub-message and a second sub-message, where the at least one first sub-message is used to indicate a downlink transmission reception condition of at least one time unit in at least one first time unit set; the second sub-information is used for indicating the downlink transmission and reception condition of at least one time unit in a second time unit set, and the downlink transmission and reception condition of at least one time unit in each first time unit set is not successfully transmitted to the network equipment;

and the network equipment acquires the downlink transmission and reception condition of at least one time unit in the at least one first time unit set and the downlink transmission and reception condition of at least one time unit in the second time unit set according to the first information.

9. The method as claimed in 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.

10. The method according to claim 8 or 9, wherein the unsuccessful transmission of the downlink transmission reception condition of at least one time unit in the first time unit set to the network device comprises:

the terminal device does not send first sub information to the network device in a first time unit due to channel interception failure, wherein the first time unit is a time unit which is scheduled by the network device and used for transmitting downlink transmission receiving conditions of at least one time unit in the first time unit set; or,

the network equipment does not successfully analyze the first sub information from the terminal equipment; or,

11. The method according to any one of claims 8-10, further comprising:

the network equipment sends second information to the terminal equipment, wherein the second information comprises at least one of the following items:

12. The method of any of claims 8-10, wherein the first information further comprises: third sub information, the third sub information including at least one of:

13. The method according to any of claims 10-12, wherein the network device indicates delayed feedback of downlink transmission reception in at least one time unit of the at least one first set of time units, the method further comprising:

and the network equipment determines at least one time unit in the at least one first time unit set corresponding to the downlink transmission receiving condition indicated in the first sub information according to the processing capability of the terminal equipment.

14. The method of claim 13, wherein the first time unit and the second time unit belong to different channel occupancy times.

15. A terminal device, characterized in that the terminal device comprises:

a processing module configured to generate first information, the first information including: at least one first sub-message and a second sub-message, where the at least one first sub-message is used to indicate a downlink transmission reception condition of at least one time unit in at least one first time unit set; the second sub-information is used for indicating the downlink transmission and reception condition of at least one time unit in a second time unit set, and the downlink transmission and reception condition of at least one time unit in each first time unit set is not successfully transmitted to the network equipment;

and the sending module is used for sending the first information to the network equipment in a second time unit after the channel interception is successful.

16. The apparatus of claim 15, wherein the at least one first sub-information is at least one first HARQ-ACK codebook, and/or wherein the second sub-information is a second HARQ-ACK codebook.

17. The apparatus according to claim 15 or 16, wherein the unsuccessful transmission of the downlink transmission reception condition of at least one time unit in the first time unit set to the network device comprises:

18. The apparatus according to any of claims 15-17, wherein the terminal device further comprises:

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

19. The apparatus according to any of claims 15-17, wherein the first information further comprises: third sub information, the third sub information including at least one of:

20. The apparatus according to any of claims 17-19, wherein the network device indicates delayed feedback of downlink transmission reception in at least one time unit of the at least one first set of time units;

the processing module is further configured to determine, according to the processing capability of the terminal device, at least one time unit of the downlink transmission reception condition to be fed back in the at least one first time unit set.

21. The apparatus of claim 20, wherein the first time unit and the second time unit belong to different channel occupancy times.

22. A network device, characterized in that the network device comprises:

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

and a processing module, configured to obtain, according to the first information, a downlink transmission and reception condition of at least one time unit in the at least one first time unit set and a downlink transmission and reception condition of at least one time unit in the second time unit set.

23. The apparatus of claim 22, wherein the at least one first sub-information is at least one first HARQ-ACK codebook, and/or wherein the second sub-information is a second HARQ-ACK codebook.

24. The apparatus according to claim 22 or 23, wherein the unsuccessful transmission of the downlink transmission reception condition of at least one time unit in the first time unit set to the network device comprises:

25. The device according to any of claims 22-24, wherein the network device further comprises:

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

26. The apparatus of any of claims 22-24, wherein the first information further comprises: third sub information, the third sub information including at least one of:

27. The device according to any of claims 24-26, wherein the network device indicates delayed feedback of downlink transmission reception in at least one time unit of the at least one first set of time units;

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 corresponding to the downlink transmission reception condition indicated in the first sub information.

28. The apparatus of claim 27, wherein the first time unit and the second time unit belong to different channel occupancy times.

29. A communication apparatus, characterized in that a computer program is stored thereon, which, when executed by the communication apparatus, implements the communication method according to any one of claims 1 to 14.

30. A computer-readable storage medium, in which a computer program or instructions are stored which, when executed, implement the method of any one of claims 1 to 14.