WO2022011697A1

WO2022011697A1 - Wireless communication method and wireless communication apparatus

Info

Publication number: WO2022011697A1
Application number: PCT/CN2020/102753
Authority: WO
Inventors: 张云昊; 徐修强; 吴艺群; 陈雁
Original assignee: 华为技术有限公司
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2022-01-20
Also published as: CN115462149A

Abstract

The present application provides a wireless communication method and a wireless communication apparatus. The method comprises: a network device transmits downlink control information, wherein the downlink control information comprises the indication information of one or more first resources and the indication information of a second resource, each first resource is used for a cluster head terminal device to transmit, to the network device, a resource for the first feedback information of first data, the second resource is used for a cluster member terminal device to transmit, to the cluster head terminal device, a resource for the second feedback information of the first data, and the first feedback information is determined according to the second feedback information; the network device transmits the first data; and the network device receives the first feedback information in one of the one or more first resources. Therefore, the present application can enable each terminal device in a cluster to obtain the resource used for transmitting feedback, and combines the multicast technology with a feedback mechanism, thereby being capable of improving the accuracy and reliability of multicast communication.

Description

Wireless communication method and wireless communication device

technical field

The embodiments of the present application relate to the field of communication, and more particularly, to a wireless communication method and a wireless communication device, which can be applied to multicast or broadcast transmission.

Background technique

At present, a multicast technology is known. For a cluster composed of multiple terminal devices, when the downlink data that the terminal devices in the cluster need to receive are the same or similar, the network device can multicast (or broadcast) the downlink data to the cluster. Thus, signaling overhead and resource overhead are saved.

How to improve the accuracy and reliability of multicast communication is an urgent problem to be solved in the industry.

SUMMARY OF THE INVENTION

The present application provides a wireless communication method and a wireless communication device, which can improve the accuracy and reliability of multicast communication.

A first aspect provides a wireless communication method, the method includes: a network device sends downlink control information, the downlink control information includes one or more indication information of a first resource and indication information of a second resource, each A resource includes a resource for the cluster head terminal device to send first feedback information for the first data to the network device, and the second resource includes a resource for a cluster member terminal device to send the cluster head terminal device for the first data The resource of the second feedback information of the first data, the first feedback information is determined based on the second feedback information; the network device sends the first data; the network device is in the one or more A first resource among the first resources receives the first feedback information.

According to the solution provided by the present application, by carrying the indication information of the resources used for the cluster head to send the feedback information to the network device and the indication information of the resources used for the cluster members to send the feedback information to the cluster head in the downlink control information, the cluster head can Each terminal device in the device knows the resources used for sending feedback, and combines the multicast technology with the feedback mechanism, thereby improving the accuracy and reliability of the multicast communication.

For example, when the feedback information sent by one or more cluster members indicates that the first data is not correctly received, the cluster head may retransmit the first data, or the cluster head may also indicate that the first data is correctly received. The cluster member terminal device retransmits the first data.

That is, the retransmission of the first data is performed within the cluster, and there is no need to retransmit the network device. Therefore, the signaling overhead of the network device can be saved, and the power consumption of the network device can be saved.

Optionally, the downlink control information includes a first field, and when the cluster head terminal device is the receiver of the downlink control information, the information carried in the first field is the indication information of the first resource, and the information carried in the first field is the indication information of the first resource. When the cluster member terminal device is the receiver of the downlink control information, the information carried in the first field is the indication information of the second resource.

In an implementation manner, the cluster head terminal device can blindly detect the second feedback information.

In another implementation manner, when the cluster head terminal device is the receiver of the downlink control information, the information carried in the first field is understood by the cluster head terminal device as the indication information of the first resource and the indication information of the second resource, so that the cluster head terminal device can receive the feedback information sent by the cluster member terminal device on the second resource.

That is, by making the understanding of the first field different between the cluster head and the cluster members, the overhead of DCI can be reduced.

Optionally, the plurality of first resources are distributed periodically.

Therefore, the signaling overhead of the indication information of the first resource can be reduced.

In other words, the multiple first resources (specifically, the times corresponding to the first resources) are distributed at equal time intervals in the time domain.

In an implementation manner, the period (or, in other words, the time domain period) of the first resource is specified by a communication protocol, or indicated by a network device through high-layer signaling.

In yet another implementation manner, the downlink control information further includes information about the period of the first resource.

The information about the period of the first resource includes, but is not limited to, at least one of the following information: information about the first period, information about the first quantity, and information about the period of the first resource, wherein the first period is the first time period from the time when the downlink control information is sent, or the first time period is the second time period from the time when the first data is sent, or the start time of the first time period There is a preset time interval between the time when the downlink control information is sent, or there is a preset time interval between the start time of the first time period and the time when the first data is sent, or the first time period for determining the time range of the plurality of first resources, and the first quantity is the quantity of the plurality of first resources.

Optionally, the downlink control information includes information of the first resource (in the time domain) and information of the last resource (in the time domain) among the plurality of first resources.

In an implementation manner, the retransmission of the first data in the cluster may be performed multiple times, and the receiving end of each retransmission may send feedback information for this retransmission to the cluster head (that is, the second feedback example of information).

In this case, the cluster head can send feedback information of multiple retransmissions to the network device.

That is, when there are multiple first resources, the network device receives third feedback information on at least one of the one or more first resources, and the third feedback information is for the cluster head terminal The feedback information of the first data retransmitted by the device or the terminal device of the cluster member.

Optionally, the first feedback information is the feedback information received by the network device for the i-th time, i≥1, and the first feedback information further includes the information used to determine the i+j-th received by the network device. information of the resource of the feedback information, j≥1.

In other words, the first feedback information further includes the location of the first resource used by the network device when receiving the feedback information for the first data sent by the cluster head terminal device next time.

In a second aspect, a wireless communication method is provided, the method comprising: a cluster head terminal device receiving downlink control information, the downlink control information including one or more indication information of a first resource and indication information of a second resource, each The first resources include resources for the cluster head terminal device to send the first feedback information for the first data to the network device, and the second resources include resources for the cluster member terminal devices to send the cluster head terminal devices for the first data. The resource of the second feedback information of the first data; the cluster head terminal device receives the first data; the cluster head terminal device receives the second feedback information in the second resource; the cluster head terminal device receives the second feedback information; The head terminal device determines the first feedback information according to the second feedback information; the cluster head terminal device sends the first feedback information in one of the one or more first resources.

Optionally, the downlink control information includes a first field, and when the cluster head terminal device is the receiver of the downlink control information, the information carried in the first field is the indication information of the first resource; in When the cluster member terminal device is the receiver of the downlink control information, the information carried in the first field is the indication information of the second resource.

In an implementation manner, the method further includes: the cluster head terminal device determines the first resource according to the information carried in the first field.

In another implementation manner, the method further includes: the cluster head terminal device determines the first resource and the second resource according to the information carried in the first field.

Optionally, when the second feedback information sent by one or more first cluster member terminal devices indicates that the first data is not correctly received, the method further includes: the cluster head terminal device retransmits the first data. data; or the cluster head terminal device instructs one or more second cluster member terminal devices to retransmit the first data, wherein the second cluster member terminal device is the cluster member terminal that sent the second feedback information device, the second feedback information indicates that the first data is correctly received.

Optionally, the method further includes: the cluster head terminal device sends sideline control information, where the sideline control information is used to indicate a third resource, and the third resource is used for retransmission of the first data .

Optionally, the method further includes: receiving, by the cluster head terminal device, third feedback information for the retransmitted first data.

Optionally, receiving, by the cluster head terminal device, third feedback information for the retransmitted first data includes receiving, by the cluster head terminal device, third feedback information for the retransmitted first data at the fourth resource.

There is a prescribed time interval between the time corresponding to the fourth resource and the transmission time of the sideline control information, and the time interval is prescribed by the communication protocol, or the time interval is set by the network device through high-level signaling Indicates that, or, the sideline control information includes information of the time interval.

Alternatively, there is a prescribed time interval between the time corresponding to the fourth resource and the retransmission time of the first data, and the time interval is prescribed by a communication protocol, or the time interval is set by the network device through high-layer signaling Indicates that, or, the sideline control information includes information of the time interval.

Optionally, the method further includes: the cluster head terminal device sends sideline control information, the sideline control information includes a second field, and the second field includes the transmission as the retransmission of the first data The identification of the terminal device on the side.

Optionally, the method further includes: the cluster head terminal device sends sideline control information, the sideline control information includes a third field and a fourth field, and the three fields include one or more third cluster members The identifier of the terminal device, and the information carried in the fourth field is used to indicate whether the third cluster member device acts as the sender or the receiver of the retransmission of the first data.

Optionally, the first feedback information is the feedback information sent by the cluster head terminal device for the i-th time, i≥1, and the first feedback information further includes a method for determining the i+th time of the cluster-head terminal device. The information of the resource of the first feedback information is sent j times, and j≥1.

Optionally, the plurality of first resources are distributed periodically.

Optionally, the downlink control information further includes at least one of the following information: information of a first time period, information of a first quantity, and information of a period of the first resource, wherein the first time period is from the downlink The transmission time of the control information (for example, the transmission start time or the transmission end time) passes through a period of the first duration, or the first time period is from the transmission time of the first data (for example, the transmission start time or the transmission end time) A time period of a second duration, or there is a preset time interval between the start time of the first time period and the transmission time of the downlink control information, or the start time of the first time period and the first data There is a preset time interval between the sending moments of the , or the first period is used to determine the time range of the plurality of first resources, and the first quantity is the quantity of the plurality of first resources.

In a third aspect, a wireless communication method is provided, the method comprising: a first cluster member terminal device receiving downlink control information, the downlink control information including one or more indication information of a first resource and indication information of a second resource , each first resource includes a resource for a cluster head terminal device to send first feedback information for the first data to the network device, and the second resource includes a resource for a cluster member terminal device to send to the cluster head terminal device The resource for sending the second feedback information for the first data; the first cluster member terminal device receives the first data; the first cluster member terminal device sends the second time-frequency resource in the second time-frequency resource Second feedback information.

That is, the method further includes the first cluster member terminal device determining the second resource according to the information carried in the first field.

Optionally, when the first cluster member terminal device fails to correctly receive the first data, the method further comprises: receiving the first data retransmitted by the cluster head terminal device; or receiving the second cluster member terminal The first data retransmitted by the device, wherein the second cluster member terminal device includes a cluster member terminal device that correctly receives the first data.

Optionally, the method further includes: sending third feedback information for the retransmitted first data to the cluster head terminal device.

Optionally, sending the third feedback information for the retransmitted first data to the cluster head terminal device includes: sending a feedback message for the retransmitted first data to the cluster head terminal device on a fourth resource. Third feedback information.

There is a specified time interval between the time corresponding to the fourth resource and the transmission time of the sideline control information, and the time interval is specified by the communication protocol, or the time interval is set by the network device through high-level signaling Indicates that, or, the sideline control information includes information of the time interval.

Optionally, when the first cluster member terminal device correctly receives the first data, the method further includes: the first cluster member terminal device retransmits the first data to the third cluster member terminal device. , wherein the third cluster member terminal device includes a cluster member terminal device that does not correctly receive the first data.

Optionally, the method further includes: receiving, by the first cluster member terminal device, sideline control information, where the sideline control information is used to indicate a third resource, and the third resource is used for the transmission of the first data. Retransmission.

Optionally, the method further includes: the first cluster member terminal device receives sideline control information, the sideline control information includes a second field, and the second field includes a retransmission as the first data The identifier of the terminal device of the sender.

Optionally, the method further includes: the first cluster member terminal device receives sideline control information, the sideline control information includes a third field and a fourth field, and the three fields include one or more third fields. The identifier of the cluster member terminal device, and the information carried in the fourth field is used to indicate that the third cluster member device acts as the sender or the receiver of the retransmission of the first data.

In a fourth aspect, a wireless communication method is provided, the method comprising: a network device sending downlink control information, the downlink control information including one or more indication information of a first resource and indication information of a second resource, the first resource The second resource includes resources for the cluster member terminal device to send the first data to the cluster head terminal device, and the first resource includes the first resource for the cluster head terminal device to send the first data for the first data to the network device resources for feedback information, and/or the first resource includes the second data for the cluster head terminal device to send to the network device, where the second data includes the first data sent by each cluster member terminal device ; the network device receives the first feedback information at one of the one or more first resources; and/or the network device is at one of the one or more first resources The first resource receives the second data.

The first data may be understood as data that the cluster member terminal device needs to forward to the network device through the cluster head terminal device.

According to the solution provided by the present application, by carrying in the downlink control information the indication information of the resource for the cluster head to send feedback information to the network device, and the indication information for the cluster member to send the first resource to the cluster head, the cluster head can make the cluster head The terminal device knows the resources used for sending feedback, and combines the sidelink transmission technology with the feedback mechanism, thereby improving the accuracy and reliability of the sidelink communication.

In another implementation manner, when the cluster head terminal device is the receiver of the downlink control information, the information carried in the first field is understood by the cluster head terminal device as the indication information of the first resource and the indication information of the second resource, so that the cluster head terminal device can receive the first data sent by the cluster member terminal device on the second resource.

Optionally, the first feedback information is the feedback information received by the network device for the i-th time, i≥1, and the first feedback information further includes the feedback information used to determine the i+j-th received feedback by the network device. Information of the resource of information, j ≥ 1.

Optionally, the plurality of first resources are distributed periodically.

Optionally, the downlink control information further includes at least one of the following information: information of a first time period, information of a first quantity, and information of a period of the first resource, wherein the first time period is from the downlink The sending moment of the control information goes through a period of the first duration, or the first period is used to determine the time range of the plurality of first resources, or the start moment of the first period and the downlink control information are different. There is a preset time interval between the sending moments, and the first quantity is the quantity of the plurality of first resources.

In a fifth aspect, a wireless communication method is provided, the method comprising: a cluster head terminal device receiving downlink control information, the downlink control information including one or more indication information of a first resource and indication information of a second resource, The second resource includes resources for the cluster member terminal device to send the first data to the cluster head terminal device, and the first resource includes the first resource for the cluster head terminal device to send the first data to the network device. resources for feedback information, and/or the first resources include resources for the cluster head terminal device to send second data to the network device, the second data including the first data sent by each cluster member terminal device; The cluster head terminal device receives the first data in the second resource; the cluster head terminal device determines the first feedback information for the first data; the cluster head terminal device is in the one or One first resource among the plurality of first resources sends the first feedback information.

That is, the method further includes: the cluster head terminal device determines the second resource and the first resource according to the information carried in the first field.

Optionally, the method further includes: the cluster head terminal device instructing the first cluster member terminal device to retransmit the first data.

Wherein, the cluster head terminal device does not correctly receive the first data sent by the first cluster member terminal device.

Optionally, the method further includes: the cluster head terminal device sends sideline control information, the sideline control information includes a second field, and the second field includes a cluster member terminal device that needs to retransmit the first data 's identification.

Optionally, the first feedback information is the feedback information sent by the cluster head terminal device for the i-th time, i≥1, and the first feedback information further includes a method for determining the i+th time of the cluster-head terminal device. The information of the resource for sending the feedback information j times, j≥1.

Optionally, the plurality of first resources are distributed periodically.

Optionally, the downlink control information further includes at least one of the following information: information of a first time period, information of a first quantity, and information of a period of the first resource, wherein the first time period is from the downlink The sending moment of the control information goes through a period of a first duration, and the first quantity is the quantity of the first resource within the first period.

In a sixth aspect, a wireless communication method is provided, the method comprising: a first cluster member terminal device receiving downlink control information, the downlink control information including one or more indication information of a first resource and indication information of a second resource , the first resource includes a resource for the cluster head terminal device to send the first feedback information for the first data to the network device, and the second resource includes a resource for the cluster member terminal device to send the cluster head terminal device to the cluster head terminal device The resource for sending the first data; the first cluster member terminal device sends the first data on the second resource.

Optionally, the method further includes: the first cluster member terminal device retransmitting the first data according to the instruction of the cluster head terminal device.

Optionally, the method further includes: receiving, by the first cluster member terminal device, sideline control information, the sideline control information including a second field, and the second field including a message that needs to retransmit the first data. ID of the cluster member terminal device.

In a seventh aspect, a communication apparatus is provided, including each module or unit for performing the method in any one of the first to sixth aspects and any possible implementation manner thereof.

In an eighth aspect, a communication device is provided, comprising a processor, coupled to a memory, operable to perform the method of any one of the first to sixth aspects and possible implementations thereof. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface. Optionally, the communication device further includes a communication interface to which the processor is coupled.

In one implementation, the communication device is a device. In this case, the communication interface may be a transceiver, or an input/output interface. In another implementation, the communication device is a chip or a system of chips. In this case, the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, etc. on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

In a ninth aspect, a communication device is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that any one of the first to sixth aspects and any possible implementation manner of each of the aspects are method is implemented.

In a specific implementation process, the above communication device may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter, and the input circuit and output The circuits can be different circuits or the same circuit, in which case the circuit is used as an input circuit and an output circuit respectively at different times. The embodiments of the present application do not limit specific implementations of the processor and various circuits.

In a tenth aspect, a processing apparatus is provided, including a processor and a memory. The processor is configured to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter, so as to execute any one of the first to sixth aspects and various possible implementations thereof. Methods.

Optionally, there are one or more processors and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

In a specific implementation, the memory can be a non-transitory memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be separately provided on different chips Above, the embodiments of the present application do not limit the type of the memory and the manner of setting the memory and the processor.

It should be understood that the relevant data interaction process, such as sending indication information, may be a process of outputting indication information from the processor, and receiving capability information may be a process of receiving input capability information by the processor. Specifically, the data output by the processing can be output to the transmitter, and the input data received by the processor can be from the receiver. Among them, the transmitter and the receiver may be collectively referred to as a transceiver.

The processor in the tenth aspect above may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software When implemented, the processor can be a general-purpose processor, which is realized by reading software codes stored in a memory, and the memory can be integrated in the processor or located outside the processor and exist independently.

An eleventh aspect provides a processing device, comprising: a communication interface and a processing circuit, where the communication interface is configured to send downlink control according to the method in the first aspect or the fourth aspect and any possible implementation manner thereof information, and the processing circuit is configured to generate the downlink control information.

A twelfth aspect provides a processing device, comprising: a communication interface and a processing circuit, where the communication interface is used to acquire downlink control information to be processed, and the processing circuit is used to obtain the downlink control information according to the second aspect and the third aspect The method in the fifth aspect or the sixth aspect and any possible implementation manner thereof processes the downlink control information to be processed.

A thirteenth aspect provides a computer program product, the computer program product comprising: a computer program (also referred to as code, or instructions) that, when the computer program is executed, causes a computer to execute the first aspect A method in any one of the to sixth aspects and any possible implementation of each of the aspects.

A fourteenth aspect provides a computer-readable medium, where the computer-readable medium stores a computer program (also referred to as code, or instruction), when it is run on a computer, causing the computer to execute the above-mentioned first A method in any one of the aspects to the sixth aspect and any possible implementation of the aspects thereof.

A fifteenth aspect provides a communication system, including the aforementioned network device, cluster head terminal device and cluster member terminal device.

Description of drawings

FIG. 1 is a schematic structural diagram of a system to which the wireless communication method of the present application is applied.

FIG. 2 is a schematic interaction diagram of an example of the wireless communication method of the present application.

FIG. 3 is a schematic diagram of a possible situation of the intra-cluster retransmission process of the present application.

FIG. 4 is a schematic diagram of another possible situation of the intra-cluster retransmission process of the present application.

FIG. 5 is a schematic interaction diagram of an example of the wireless communication method of the present application.

FIG. 6 is a schematic diagram of another possible situation of the intra-cluster retransmission process of the present application.

FIG. 7 is a schematic configuration diagram of an example of the wireless communication apparatus of the present application.

FIG. 8 is a schematic configuration diagram of another example of the wireless communication apparatus of the present application.

FIG. 9 is a schematic configuration diagram of still another example of the wireless communication device of the present application.

FIG. 10 is a schematic configuration diagram of an example of a terminal device of the present application.

FIG. 11 is a schematic structural diagram of an example of a network device of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: Global System for Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, wideband Code Division Multiple Access (CDMA) system (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5th Generation (5G) system, future sixth generation (6th Generation, 6G) or new radio (New Radio, NR), etc.

The terminal device in this embodiment of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or user device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or future evolved Public Land Mobile Networks (PLMN) A terminal device, etc., is not limited in this embodiment of the present application.

The network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a Global System for Mobile communication (GSM) system or a Code Division Multiple Access (Code Division Multiple Access, CDMA) The base station (Base Transceiver Station, BTS) in the LTE system can also be the base station (NodeB, NB) in the Wideband Code Division Multiple Access (WCDMA) system, or the evolved base station (Evolved) in the LTE system. NodeB, eNB or eNodeB), it can also be a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the network device can be a relay station, an access point, an in-vehicle device, a wearable device, and future The network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiments of the present application.

To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail with reference to FIG. 1 . FIG. 1 is a schematic diagram of a communication system applicable to the solution of the embodiment of the present application. As shown in FIG. 1 , the communication system may include network equipment and terminal equipment.

It should be understood that the network device can be any device with a wireless transceiver function or a chip that can be provided in the device, and the network device includes but is not limited to: a base station (for example, a base station NodeB, an evolved base station eNodeB, a fifth-generation (5G) ) network equipment in communication systems (such as transmission point (TP), transmission reception point (TRP), base station, small base station equipment, etc.), network equipment in future communication systems, wireless fidelity (Wireless Fidelity) -Fidelity, WiFi) access node, wireless relay node, wireless backhaul node, etc. in the system.

Terminal equipment may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, and an augmented reality (Augmented Reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security ( Wireless terminals in transportation safety), wireless terminals in smart cities, wireless terminals in smart homes, and so on. The embodiments of the present application do not limit application scenarios. In the embodiments of the present application, the aforementioned terminal device and the chip that can be provided in the aforementioned terminal device are collectively referred to as a terminal device. In addition, in the embodiments of the present application, the terminal device may also be a terminal device in an Internet of Things (Internet of Things, IoT) system. IoT is an important part of the future development of information technology, and its main technical feature is that items pass through communication technology. Connect with the network, so as to realize the intelligent network of human-machine interconnection and the interconnection of things.

In the embodiments of the present application, the IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, a narrowband (Narrow Band, NB) technology. For example, the resource used in the NB technology only includes one resource block (Resource Bloc, RB), that is, the bandwidth of the resource used in the NB technology is only 180KHz. To achieve massive access, the terminals must be discrete in terms of access. According to the communication method of the embodiment of the present application, the congestion problem when massive terminals of IoT technology access the network through the NB can be effectively solved.

The communication system may be a public land mobile network (PLMN) network, a device to device (D2D) network, a machine to machine (M2M) network, or other networks. FIG. 1 is a simplified schematic diagram for easy understanding only, and the communication system 100 may also include other network devices and terminal devices, which are not shown in FIG. 1 .

In this embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (Central Processing Unit, CPU), a memory management unit (Memory Management Unit, MMU), and memory (also called main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiments of the present application do not specifically limit the specific structure of the execution body of the methods provided by the embodiments of the present application, as long as the program that records the codes of the methods provided by the embodiments of the present application can be executed to provide the methods provided by the embodiments of the present application. For example, the execution subject of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute a program.

Furthermore, various aspects or features of the embodiments of the present application may be implemented as a method, apparatus or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer readable device, carrier or medium. For example, computer-readable media may include, but are not limited to, magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, Compact Disc (CD), Digital Versatile Disc (DVD) etc.), smart cards and flash memory devices (eg, Erasable Programmable Read-Only Memory (EPROM), cards, stick or key drives, etc.). Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

It should be noted that, in this embodiment of the present application, multiple application programs may be run at the application layer. In this case, the application program that executes the communication method of the embodiment of the present application is used to control the receiving end device to complete the received data. The applications of the corresponding actions may be different applications.

For ease of understanding, some terms involved in this application are first explained.

In this application, multiple (two or more) terminal devices capable of inter-device communication may form a cluster, where a cluster may also be referred to as a terminal device cluster. A cluster can include one or more cluster heads and one or more cluster members. The cluster head may also be referred to as a cluster head, a cluster head terminal device, a cluster head terminal device, or a cooperating terminal device (Cooperating UE, CUE). Cluster members may also be called cluster member terminal equipment, target terminal equipment (Targeting UE, TUE).

Within the same cluster, the cluster head can perform inter-device communication with multiple (eg, some or all) cluster members, for example, perform inter-device communication through a side link (Sidelink). In some cases, multiple cluster members are capable of inter-device communication with each other. Also, in some cases, the identities of cluster heads and cluster members can be switched.

For example, in a scenario with a large number of connections such as Massive machine-type communications (mMTC), the channel quality between some terminals and the base station is poor. In this case, terminal devices with poor channel quality and One or more terminal devices with good channel quality form a cluster, and a terminal device with good channel quality (for example, can act as a cluster head) assists a terminal device with poor channel quality (for example, can act as a cluster member) to forward data.

For another example, multiple terminal devices with the same or similar service types, or terminal devices that need to receive the same or similar downlink data may form a cluster. In this case, the network device may multicast downlink information to the terminal devices in the cluster.

In some cases, a terminal device with higher performance or sufficient power can be selected as the cluster head. In other cases, a terminal device with less load or better channel quality can be selected as the cluster head.

In this application, a communication system may include one cluster or multiple clusters, and the communication process of each cluster is similar. Hereinafter, for ease of understanding and description, cluster #A (or, it may also be referred to as a terminal device cluster) The communication process of #A) is taken as an example, and the wireless communication method of the present application will be described in detail.

Fig. 2 shows the transmission process of downlink data of the present application. As shown in Fig. 2, when a network device needs to send data to multiple terminal devices in cluster #A (for example, it may be some or all of the terminal devices in cluster #A) When sending downlink data (denoted, data #A), in S110, the network device may send downlink control information (Downlink Control Information, DCI) to each terminal device in cluster #A by multicast (or broadcast). For example, the DCI may be carried on a Physical Downlink Control Channel (PDCCH)

Wherein, the DCI includes indication information of time-frequency resources of a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), and the PDSCH is used for carrying network equipment and needs to be sent to multiple (for example, some or all) data #A of the terminal device.

In addition, the terminal equipment in cluster #A can blindly detect DCI, and then determine time-frequency resource #A according to the received DCI.

Therefore, the network device transmits the data #A on the PDSCH (or the time-frequency resource corresponding to the PDSCH), and the terminal devices in the cluster #A receive the data #A on the PDSCH.

It should be noted that, in this application, the data #A may be initial transmission data or retransmission data, which is not particularly limited in this application.

In S120, the cluster members (or cluster member terminal devices) in cluster #A send feedback for data #A to the cluster head (or cluster head terminal devices, denoted as cluster head #A) in cluster #A information (that is, an example of the second feedback information, referred to as feedback information #B1).

The process of sending the feedback information #B1 by each cluster member is similar. Here, for ease of understanding, the process is described in detail by taking the cluster member #A as an example.

First, the cluster member #A generates feedback information #B1 of the cluster member #A for the data #A sent by the network device according to whether it has correctly received (or correctly decoded) the data #A. The process may be similar to that in the prior art, and detailed descriptions thereof are omitted here in order to avoid redundant descriptions.

Thereafter, the cluster member #A transmits the feedback information #B1 to the cluster head #A on the time-frequency resource #B1 (ie, an example of the second resource).

Wherein, the above-mentioned DCI carries the indication information of the time-frequency resource #B1.

It should be noted that in this application, each cluster member in cluster #A sends the time-frequency resource (ie, an example of the second resource) to the cluster head #A when the feedback information for the data #A sent by the network device is used. They may be the same or different, and are not particularly limited in the present application.

When each cluster member in cluster #A sends the feedback information for data #A sent by the network device to cluster head #A, the time-frequency resources used are the same, that is, when they are all the above-mentioned time-frequency resource #B1, each cluster member The same time-frequency resource can be used to transmit the respective feedback information by means of code division multiplexing, frequency division multiplexing, or space division multiplexing. In this case, the indication information of the time-frequency resource #B1 may be carried in the DCI, so that signaling overhead can be reduced.

In a possible implementation manner, the DCI may instruct the network device to allocate time-frequency resources to the cluster #A, and the cluster head #A may inform each cluster member of the time-frequency resource allocation rules in advance, so that the cluster members can #A can determine the time-frequency resource #B1 from the time-frequency resources allocated to the cluster #A according to the allocation rule.

When the time-frequency resources used by each cluster member in the cluster #A to send the feedback information for the data #A sent by the network device to the cluster head #A are different, each cluster member can be carried in the DCI to send the feedback information for the data #A. Indication information of the time-frequency resources used in the feedback information.

As an example and not a limitation, the indication information of the time-frequency resource #B1 may include indication information of the time-domain position (denoted, time-domain position #B1) of the time-frequency resource #B1 and/or the indication information of the time-frequency resource #B1 Indication information of the frequency domain position (denoted as frequency domain position #B1).

Wherein, the indication information of the frequency domain location #B1 may be carried in the "Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH) resource indication field" of the DCI.

In addition, the indication information of the time domain position #B1 can be used to indicate the relative position of the time domain position #B1, that is, the time interval between the time domain position #B1 and the reference time domain position (for example, t1 shown in FIG. 2 ) For example, the reference time domain position may include, but is not limited to, the transmission time of DCI, or the transmission time of data #A (or, in other words, the PDSCH carrying data #A).

Wherein, the indication information of time domain position #B1 may be carried in the "PDSCH-to-HARQ_feedback timing indicator field" of the DCI.

It should be understood that the specific content indicated by the indication information of the time domain position #B1 listed above is only an exemplary illustration, and the present application is not limited thereto. For example, the indication information of the time domain position #B1 can also be used to indicate the Absolute position of time domain position #B1.

In addition, the cluster head #A can determine the time-frequency resource #B1 based on the indication of the DCI, so that the cluster head #A can receive the feedback information for data #A sent by each cluster member on the time-frequency resource #B1.

In S130, the cluster head #A can generate feedback information #A1 (ie, an example of the first feedback information) according to the feedback information for the data #A sent by each cluster member and whether it has correctly received the data #A.

As an example and not a limitation, the feedback information #A1 may include, but is not limited to, any of the following manners (or indicate content).

way 1

That is, the feedback information #A1 includes feedback information for data #A of each terminal device within cluster #A.

For example, the feedback information #A1 includes N bits, the N bits are in one-to-one correspondence with the N terminal devices in the cluster #A, and each bit is used to carry the feedback information for the data #A of the corresponding terminal device , for example, acknowledgment (ACK) or non-acknowledgement (NACK).

way 2

That is, the receiving conditions of each terminal device in cluster #A for a certain data may include the following two situations:

Case 1, each terminal device in cluster #A receives correctly;

Case 2, at least one terminal device within cluster #A does not receive correctly.

For example, in this application, 1 bit can be used to distinguish the above case 1 and case 2, for example, "0" represents case 1, and "1" represents case 2.

In this case, the feedback information #A1 can be used to indicate the situation in the above-mentioned case 1 or case 2 that conforms to the actual reception result of the data #A by the cluster #A (specifically, each terminal in the cluster #A), Remember to do, case #A.

And, the feedback information #A1 may include bits corresponding to the case #A.

way 3

That is, the receiving conditions of each terminal device in cluster #A for a certain data may include the following four situations:

In case a, each terminal device in cluster #A receives correctly;

In case b, cluster head #A receives correctly, and at least one cluster member does not receive correctly;

In case c, the cluster head #A is not correctly received, and at least one cluster member is correctly received;

In case d, each terminal device within cluster #A is not receiving correctly.

For example, in this application, 2 bits can be used to distinguish the above-mentioned case a ~ case c, for example, "00" represents the case #A is the above-mentioned case a, "01" represents the case b, "10" represents the case c, " 11" represents case d. In this case, the feedback information #A1 can be used to indicate the cases in the above-mentioned cases a to c that correspond to the actual reception results of the data #A by the cluster #A (specifically, each terminal in the cluster #A), Remember to do, case #A. And, the feedback information #A1 may include a bit sequence corresponding to the case #A.

For another example, in this application, the UCI sequence carried on the PUCCH, for example, the ZC sequence, may include multiple (at least three) cyclic shifts. Wherein, each of the above cases a to case c corresponds to a cyclic shift.

In other words, a mapping relationship #1 may be stored in the network device and the cluster head, where the mapping relationship #1 is used to indicate the cyclic shift corresponding to each of the cases a to the case c.

Therefore, the cluster head #A is based on the cases corresponding to the actual reception results of the data #A for the data #A by the cluster #A (specifically, each terminal in the cluster #A) among the above-mentioned cases a to c (that is, the case #A). ) The corresponding cyclic shift (denoted, cyclic shift #A) transmits UCI on the PUCCH.

That is, the feedback information #A1 can be indirectly indicated by the cyclic shift corresponding to the case #A.

In other words, the cyclic shift corresponding to the situation #A is an implementation of the feedback information #A1.

At S140, the cluster head #A sends the feedback information #A1 to the network device on the time-frequency resource #A1 (ie, an example of the first resource).

Wherein, the above-mentioned DCI carries the indication information of the time-frequency resource #A1.

As an example and not a limitation, the indication information of the time-frequency resource #A1 may include indication information of the time-domain position (denoted, time-domain position #A1) of the time-frequency resource #A1 and/or the indication information of the time-frequency resource #A1 Indication information of the frequency domain position (denoted as frequency domain position #A1).

The indication information of the frequency domain location #A1 may be carried in the "PUCCH resource indication field" of the DCI.

In addition, the indication information of the time domain position #A1 can be used to indicate the relative position of the time domain position #A1, that is, the time interval between the time domain position #A1 and the reference time domain position (for example, t2 shown in FIG. 3 ) For example, the reference time domain position may include, but is not limited to, the transmission time of DCI, or the transmission time of data #A (or, in other words, the PDSCH carrying data #A).

Wherein, the indication information of the time domain position #A1 may be carried in the "PDSCH-to-HARQ_feedback timing indicator field" of the DCI.

It should be understood that the specific content indicated by the indication information of the time domain location #A1 listed above is only an exemplary illustration, and the present application is not limited to this. For example, the indication information of the time domain location #A1 can also be used to indicate the Absolute position of time domain position #A1.

Or, in a possible implementation manner, it is assumed that the time window formed by a specified duration T from the transmission time of the DCI (or PDSCH) includes U data for the cluster head #A to send the feedback information to the network device. Time domain resource (noted, t _U ). Then, for example, the DCI may include information of the time interval t _U between the feedback information of two adjacent clusters, or, in other words, the DCI may include the period during which the cluster head #A sends the feedback information to the network device. For another example, the DCI may further include information of the duration T. For another example, the DCI may also include the value of U. For another example, the DCI may include information used to determine the first time domain resource for the cluster head #A to send feedback information to the network device, the time interval tu, and the information indicating the value of U. One or more pieces of the above-mentioned information may be regarded as indication information of time-domain position #A1, that is, one or more pieces of information in the above-mentioned information may implicitly indicate the indication information of time-domain position #A1, in this case, the cluster Head #A can calculate the time, including time domain position #1, for cluster head #A to send feedback information to the network device according to the above information carried in the DCI and the transmission time of the DCI (or PDSCH).

In this application, the indication information of time domain location #A1 and the indication information of time domain location #B1 may be indicated by the same information (denoted, information #1). That is, when the cluster head #A reads the information #1 from the DCI (for example, the "PDSCH-to-HARQ_feedback timing indicator field" of the DCI), it is considered that the information #1 indicates the time domain position #A1; cluster member #A When the information #1 is read from the DCI, it can be considered that the information #1 indicates the time domain position #B1.

Or, when the cluster head #A reads the information #1 from the DCI (for example, the "PDSCH-to-HARQ_feedback timing indicator field" of the DCI), it considers that the information #1 indicates the time domain location #A1 and the time domain location # B1.

In a possible implementation manner, the time domain position of the time-frequency resource (for example, the time domain position relative to the time interval of the PDSCH) for the cluster head to send the feedback information to the network device has X possible situations, and the cluster members There are Y possible situations for the time-domain position of the time-frequency resource for sending feedback information to the cluster head (eg, the time-domain position relative to the time interval of the PDSCH). That is, the X cases and the Y cases constitute X·Y possible combinations.

In this case, entry 1 may be stored in the network device, and entry 1 may store the one-to-one correspondence between X·Y possible combinations and X·Y indices.

In addition, in the cluster head #A, table entry 1 may be stored, or, in the cluster head #A, the time-frequency resources of the time-frequency resources for sending feedback information to the network device by the cluster head corresponding to each index in the X·Y indices may be stored in the cluster head #A. Time domain location (ie, one of the X possible locations above).

In addition, in each cluster member, table entry 1 may be stored, or the cluster member may store the time domain of the time-frequency resource for sending feedback information to the cluster head by the cluster member corresponding to each of the X·Y indices. position (ie, one of the Y possible positions above).

Therefore, the network device can determine the index (denoted, index #A) corresponding to the combination (denoted, combination #A) formed by time domain location #A1 and time domain location #B1 according to table entry #1. The index #A is carried in the DCI (for example, the "PDSCH-to-HARQ_feedback timing indicator field" of the DCI). In further embodiments, each index (eg, index #A) may be associated with one or more time domain locations #A1, and one or more time domain locations #B1. The corresponding relationship between the index and the time domain position A1 and the time domain position B1 may be preset or configured by a network device.

Further, the cluster head #A can determine the index #A from the stored table entry, and then determine the time domain position #A1 (or, the time domain position #A1 and the time domain position #B1), and the cluster member #A can be stored from the stored table entry #A. The index #A is determined in the entry of , and then the time domain position #B1 is determined.

Similarly, the indication information of frequency domain location #A1 and the indication information of frequency domain location #B1 may be indicated by the same information (denoted, information #2). That is, when the cluster head #A reads the information #2 from the DCI (for example, the "PUCCH resource indication field" of the DCI), it considers that the information #1 indicates the frequency domain location #A1; the cluster member #A is reading the information from the DCI When the information #2 is obtained, it can be considered that the information #2 indicates the frequency domain position #B1.

Alternatively, when the cluster head #A reads the information #2 from the DCI (for example, the "PUCCH resource indication field" of the DCI), it considers that the information #1 indicates the frequency domain location #A1 and the frequency domain location #B1.

In a possible implementation manner, there are W possible situations in the frequency domain position of the time-frequency resource for the cluster head to send the feedback information to the network device, and the frequency domain position of the time-frequency resource for the cluster member to send the feedback information to the cluster head There are Z possible scenarios. That is, the W cases and Z cases constitute W·Z possible combinations.

In this case, a table entry 2 may be stored in the network device, and the table entry 2 may store a one-to-one correspondence between W·Z possible combinations and W·Z indices.

In addition, in the cluster head #A, table entry 2 may be stored, or in the cluster head #A, the time-frequency resources of the time-frequency resources for sending feedback information to the network device by the cluster head corresponding to each index in the W·Z indices may be stored in the cluster head #A. Frequency domain location (ie, one of the above W possible locations).

In addition, in each cluster member, table entry 2 may be stored, or the cluster member may store the frequency domain of the time-frequency resource for sending feedback information to the cluster head by the cluster member corresponding to each of the W·Z indices. position (ie, one of the Z possible positions described above).

Therefore, the network device can determine the index (denoted, index #B) corresponding to the combination (denoted, combination #B) formed by frequency domain location #A1 and frequency domain location #B1 according to table entry #2. The index #B is carried in the DCI (eg, the "PUCCH resource indication field" of the DCI).

Further, the cluster head #A can determine the index #B from the stored table entry, and then determine the frequency domain position #A1 (or, the frequency domain position #A1 and the frequency domain position #B1), and the cluster member #A can be determined from the stored table entry #A1. The index #B is determined in the table entry of , and then the frequency domain position #B1 is determined.

Optionally, at S150, when at least one terminal device in cluster #A does not correctly receive data #A, cluster head #A controls the terminal number devices in cluster #A to perform a process of retransmission within the cluster, and subsequently, combined with Figures 3 and 4 illustrate this process in detail.

At S160, the network device performs an operation according to the received feedback information #A1.

For example, when the feedback information #A1 indicates that all terminal devices in the cluster #A have correctly received the data #A, the network device may end the sending process of the data #A, and may send new data.

For example, when feedback information #A1 indicates that all terminal devices in cluster #A have not received data #A correctly, the network device retransmits data #A, eg, the network device retransmits (ie, multicasts or broadcasts) data #A , or, send (ie, multicast or broadcast) a redundant version of data #A.

For another example, when the feedback information #A1 indicates that at least one terminal device in the cluster #A has not correctly received the data #A, the network device may wait for the intra-cluster retransmission process for the data #A in the cluster #A.

Next, the intra-cluster retransmission process will be described in detail.

The purpose of the intra-cluster retransmission process is to enable a cluster member that does not correctly receive data #A to correctly receive data #A from within cluster #A, and the cluster member that does not correctly receive data #A may be one or another This application is not particularly limited. In the following, for the convenience of understanding and description, it is assumed that cluster member #A does not correctly receive data #A, and the action of cluster member #A in the retransmission process is taken as an example, the retransmission process is explained.

FIG. 3 shows the procedure when the cluster head #A correctly receives the data #A.

First, cluster head #A can send sidelink control information (Sidelink Control Information, SCI), the SCI includes indication information of time-frequency resource #C, and the time-frequency resource #C is the physical sidelink shared channel (Physical Sidelink Control Information, SCI). Sidelink Shared Channel, PSSCH) time-frequency resources, and the PSSCH is used to carry the data #B that the cluster head #A needs to send to the cluster members (for example, the cluster member #A) that does not receive the data #A correctly, wherein the Data #B can be data #A, or data #B can also be a redundant version of data #A, or data #B can be different from data #A in encoding methods (including encoding type, code rate, encoding length, etc.) Specifically, the data #B and the data #A may be data encoded by the same information bits based on different encoding methods.

As an example and not a limitation, the SCI may be sent in a broadcast or multicast manner.

For example, the SCI may carry the identifiers of cluster members including cluster member #A that did not correctly receive data #A, so that each cluster member in cluster #A determines whether its own identifier is carried in the SCI. If the determination result is "Yes", it can be determined that it is the receiving end of the SCI, and needs to receive data based on the indication of the SCI.

For another example, the SCI may not include the identifiers of the cluster members that did not receive the data #A correctly, so that each cluster member in the cluster #A determines whether it is the receiving end of the SCI according to whether the data #A is correctly received. , and whether data needs to be received based on an SCI-based indication. That is, if a certain cluster member (eg, cluster member #A) does not correctly receive data #A, the cluster member #A determines that the SCI needs to be parsed, and needs to receive data based on the SCI's indication.

For another example, the SCI of the present application may include field #A and field #B.

Wherein, the field #B carries the identifiers of one or more terminal devices (denoted as identifier #1).

The information carried in the field #A is used to indicate whether the terminal device indicated by the identifier #A is the sender or the receiver of the data. For example, "1" indicates that the terminal device indicated by the identifier #A is the sender of data, and "0" indicates that the terminal device indicated by the identifier #A is the receiver of the data.

In this case, in the process shown in FIG. 3 , the field #B carries the identifier of the cluster head #A, and the information carried in the field #A indicates that the terminal device indicated by the identifier carried in the field #B is the sender of the data, that is, , and field #A carries "1".

In this case, cluster member #A can determine, based on the information carried in field #A, that the terminal device (ie, cluster head #A) indicated by the identifier carried in field #B is the sender of data #B, and because the cluster member #A does not correctly receive data #A, therefore, it is determined that it needs to receive the data scheduled by this SCI (ie, data #B).

In addition, it can be determined that it is not necessary to receive the data scheduled by the SCI (ie, data #B) for the cluster member that correctly receives the data #A.

For another example, the SCI of the present application may include field #C.

The identifier carried in field #C is the sender of the data (for example, retransmitted data).

In this case, in the process shown in FIG. 3 , the field #C carries the identifier of the cluster head #A.

Furthermore, cluster member #A can determine, based on the information carried in field #A, that the terminal device (ie, cluster head #A) indicated by the identifier carried in field #C is the sender of data #B, and since cluster member #A Data #A is not received correctly, so it is determined that the data scheduled by the SCI (ie, data #B) needs to be received.

In one implementation, cluster members within cluster #A can blindly detect SCI.

Thus, cluster head #A sends data #B on time-frequency resource #C, and cluster member #A receives data #B on time-frequency resource #C.

Thereafter, the cluster member #A generates feedback information #B2 of the cluster member #A with respect to the data #B sent by the cluster head #A according to whether it has correctly received (or correctly decoded) the data #B. .

After that, the cluster member #A sends the feedback information #B2 to the cluster head #A on the time-frequency resource #B2 (ie, an example of the second resource).

In an implementation manner, the above-mentioned SCI carries the indication information of the time-frequency resource #B2.

In another implementation manner, the network device may send the indication information of the time-frequency resource #B2 through high-layer signaling.

It should be noted that in this application, each cluster member in cluster #A that does not correctly receive data #A is the time-frequency resource (that is, the second resource) used when sending feedback information for data #B to cluster head #A. An example) may be the same or different, and is not particularly limited in the present application.

When each cluster member in cluster #A that does not correctly receive data #A uses the same time-frequency resource when sending the feedback information for data #B, that is, the above-mentioned time-frequency resource #B2, each cluster member may use the same time-frequency resource. Code division multiplexing, frequency division multiplexing or space division multiplexing etc. use the same time-frequency resource to transmit respective feedback information. In this case, the indication information of the time-frequency resource #B2 may be carried in the SCI, so that signaling overhead can be reduced.

When each cluster member in cluster #A that does not receive data #A correctly uses different time-frequency resources when sending feedback information for data #B, each cluster member can be carried in the SCI to send feedback for data #B Indication information of the time-frequency resources used in the information. In this case, the complexity of communication can be reduced.

By way of example and not limitation, the indication information of the time-frequency resource #B2 may include indication information of the time-domain position (denoted, time-domain position #B2) of the time-frequency resource #B2 and/or the indication information of the time-frequency resource #B2 Indication information of the frequency domain position (denoted as frequency domain position #B2).

In addition, the indication information of the time domain position #B2 can be used to indicate the relative position of the time domain position #B2, that is, the time interval between the time domain position #B2 and the reference time domain position (for example, t3 shown in FIG. 3 ) For example, the reference time domain position may include, but is not limited to, the sending time of the SCI, or the sending time of the data #B (or, in other words, the PSSCH carrying the data #B).

As an example but not a limitation, the SCI may further include the indication information of the t3, or the t3 may also be configured by the network device through high-layer signaling.

It should be understood that the specific content indicated by the indication information of the time domain position #B2 listed above is only an exemplary illustration, and the present application is not limited to this. For example, the indication information of the time domain position #B2 can also be used to indicate the Absolute position of time domain position #B2.

Therefore, the cluster head #A can receive the feedback information for the data #B sent by each cluster member in the cluster #A that has not correctly received the data #A.

After that, the cluster head #A can generate feedback information #A2 (ie, an example of the first feedback information) based on the feedback information for the data #B.

Similar to the above-mentioned feedback information #A1, the feedback information #A2 may include, but is not limited to, any of the following manners (or, in other words, indicating content).

way 4

That is, this feedback information #A2 includes feedback information for data #B for each cluster member within cluster #A that did not receive data #A correctly.

For example, the feedback information #A2 includes N bits, and the N bits are in one-to-one correspondence with the N terminal equipments in the cluster #A, and each bit is used to carry the feedback information of the corresponding terminal equipment, for example, an acknowledgment ( ACK) or non-acknowledgement (NACK).

way 5

That is, the reception conditions of each cluster member in cluster #A for a certain data may include the following two situations:

Case 3, each receiver receives correctly;

Case 4, at least one receiver is not receiving correctly.

For example, in the present application, 1 bit can be used to distinguish the above case 3 and case 4, for example, "0" represents case 3, and "1" represents case 4.

In this case, the feedback information #A2 can be used to indicate that the conforming cluster #A in the above-mentioned case 3 or case 4 (specifically, each cluster member in the cluster #A that did not receive the data #A correctly) is for the data #B The case of the actual reception result is recorded as case #B.

And, the feedback information #A2 may include bits corresponding to the case #B.

way 6

That is, the receiving conditions of each terminal device in cluster #A for a certain data may include the following three situations:

In case a, each terminal device in cluster #A receives correctly;

In case c, cluster head #A does not receive correctly, and at least one cluster member receives correctly.

For example, in this application, 2 bits can be used to distinguish the above cases a to c, for example, "00" represents the case #A is the above case a, "01" represents the case b, and "10" represents the case c. In this case, the feedback information #A2 can be used to indicate that the conforming cluster #A (specifically, each cluster member in the cluster #A that did not correctly receive the data #A) in the above-mentioned cases a to c is for the data #B The case of the actual reception result is recorded as case #B. And, the feedback information #A2 may include the bit sequence corresponding to the case #B.

For another example, in this application, a PUCCH sequence, eg, a ZC sequence, may include multiple (at least three) cyclic shifts. Wherein, each of the above cases a to case c corresponds to a cyclic shift.

In other words, a mapping relationship #1 may be stored in the network device and the cluster head, where the mapping relationship #1 is used to indicate the cyclic shift corresponding to each of the cases a to c.

Therefore, the cluster head #A is based on the actual reception result of the data #B corresponding to the cluster #A (specifically, each cluster member in the cluster #A that did not correctly receive the data #A) in the above-mentioned cases a to c. The cyclic shift (denoted, cyclic shift #B) corresponding to the case (ie, case #B) transmits the PUCCH.

That is, the feedback information #A2 can be indirectly indicated by the cyclic shift corresponding to the case #B.

In other words, the cyclic shift corresponding to the case #B is an implementation manner of the feedback information #A2.

Thereafter, the cluster head #A sends the feedback information #A2 to the network device on the time-frequency resource #A2 (ie, an example of the first resource).

In an implementation manner, the above-mentioned DCI carries the indication information of the time-frequency resource #A2. In addition, the content and form indicated by the indication information of the time-frequency resource #A2 are similar to the indication information of the time-frequency resource #A1, and the detailed description thereof is omitted here to avoid redundant description.

In another implementation manner, the time-domain position (denoted, time-domain position #2) of the time-frequency resource #A2 and the time-domain position (ie, time-domain position #1) of the time-frequency resource #A1 are There is a defined time interval (eg, t6 in Figure 3).

For example, this t6 is the same as t2, that is, in the present application, multiple intra-cluster retransmissions may occur. In this case, the time domain resources for the cluster head #A to send feedback information to the network device appear periodically, so that the Reduce signaling overhead.

In a possible implementation, it is assumed that the time window formed by a specified duration T from the transmission time of the DCI (or PDSCH) includes U time points ( Remember to do, t _U ).

Then, for example, the DCI may include information of the time interval t _U between the feedback information of two adjacent clusters, or, in other words, the DCI may include the period during which the cluster head #A sends the feedback information to the network device.

For another example, the DCI may further include information of the duration T.

For another example, the DCI may also include the value of U.

Therefore, according to the above information carried in the DCI and the transmission time of the DCI (or PDSCH), the cluster head #A can calculate the time domain position #1 and the time domain position #2 for the cluster head #A to send feedback to the network device. moment of information.

In another possible implementation manner, the DCI may carry the indication information of t6.

In another possible implementation manner, there is a predetermined time interval between the time domain position #A2 and the time domain position of the PDSCH, and the DCI may carry indication information of the time interval.

Optionally, when at least one cluster member in cluster #A does not correctly receive data #B, the cluster head #A may also perform the retransmission process again, for example, send data #A, data #B or another of data #A. A redundant version, and the process may be similar to the transmission process of data #B, and its detailed description is omitted here in order to avoid redundant description.

And, the network device performs an operation according to the received feedback information #A2.

For example, when the feedback information #A2 indicates that all receiving ends of the data #B are correctly received (or in other words, the feedback information #A2 indicates that all the terminal devices in the cluster #A are correctly receiving the data #A), the network device can end the data #A A's sending process, and can send new data.

For another example, when the feedback information #A2 indicates that at least one receiving end of the data #B has not correctly received the data (or in other words, the feedback information #A2 indicates that at least one terminal device in the cluster #A has not correctly received the data #A), the network device may Continue to wait for the intra-cluster retransmission process for data #A (or, data #B) in cluster #A.

FIG. 4 shows the procedure when the cluster head #A does not correctly receive the data #A.

First, the cluster head #A can send SCI#1, the SCI#1 includes the indication information of the time-frequency resource #D, the time-frequency resource #D is the physical sidelink shared channel (Physical Sidelink Shared Channel, PSSCH) time and the PSSCH is used to carry the data #C that the cluster member #C needs to send to the cluster member (for example, the cluster member #A) that does not receive the data #A correctly, where the data #C can be the data #A , or, the data #C may also be a redundant version of the data #A, or the data #C may be different from the encoding mode (including encoding type, code rate, encoding length, etc.) of the data #A. Specifically, the data #C and data #A may be data encoded by the same information bits based on different encoding methods.

Among them, cluster member #C is a cluster member that correctly receives data #A. In addition, the number of the cluster member #C may be one or more, which is not particularly limited in the present application.

As an example and not a limitation, the SCI#1 may be sent in a broadcast or multicast manner.

For example, the SCI#1 can carry the identifier of the cluster member #C, so that each cluster member in the cluster #A determines whether its own identifier is carried in the SCI#1 (specifically, it is specified in the SCI#1). A field used to carry the identifier of the sender of the data scheduled by the SCI). If the determination result is "Yes", it can be determined that it is the transmitting end of the SCI #1, and it is necessary to transmit data (ie, data #C) based on the indication of the SCI #1.

For example, the SCI#1 may carry the identifiers of cluster members including cluster member #A that have not correctly received data #A, so that each cluster member in cluster #A determines whether their own identifiers are carried in the SCI# 1 (specifically, a field specified in SCI#1 for carrying the identifier of the receiving end of the data scheduled by this SCI#1). If the determination result is "Yes", it can be determined that it is the receiving end of the SCI#1, and needs to receive data based on the indication of the SCI#1.

For another example, the SCI#1 may not include the identifiers of the cluster members that did not correctly receive the data #A, so that each cluster member in the cluster #A determines whether it is the SCI# according to whether the data #A is correctly received. 1, and whether it needs to receive data based on the indication of SCI#1. That is, if a certain cluster member (eg, cluster member #A) does not correctly receive data #A, the cluster member #A determines that it needs to receive data based on the indication of SCI #1.

For another example, SCI#1 of the present application may include field #A and field #B.

In this case, in the process shown in FIG. 4 , the field #B carries the identifier of the cluster member #C, and the information carried in the field #A indicates that the terminal device indicated by the identifier carried in the field #B is the sender of the data, that is, , and field #A carries "1".

In this case, cluster member #C can determine, based on the information carried in field #A, that the terminal device (ie, cluster member #C) indicated by the identifier carried in field #B is the sender of data #C, so that cluster member # C can transmit data (ie, data #C) based on the schedule of this SCI #1.

Cluster member #A can determine, based on the information carried in field #A, that the terminal device (ie, cluster member #C) indicated by the identifier carried in field #B is the sender of data #C, and because cluster member #A is incorrect Data #A is received, and therefore, it is determined that the data scheduled by this SCI #1 (ie, data #C) needs to be received.

In addition, it can be determined that it is not necessary to receive the data scheduled by the SCI #1 (ie, the data #C) for the cluster member that correctly receives the data #A.

For another example, the SCI of the present application may include field #C.

In this case, in the process shown in FIG. 4 , the field #C carries the identifier of the cluster member #C.

Cluster member #C can determine, based on the information carried in field #C, that the terminal device (ie, cluster member #C) indicated by the identifier carried in field #C is the sender of data #C, so that cluster member #C can Scheduled transmission data of SCI #1 (ie, data #C).

In addition, cluster member #A can determine that the terminal device (ie, cluster member #C) indicated by the identifier carried by field #C is the sender of data #B based on the information carried by field #A, and since cluster member #A Data #A is not received correctly, so it is determined that the data scheduled by the SCI (ie, data #B) needs to be received.

In one implementation, cluster members within cluster #A can blindly detect SCI #1.

Thus, cluster member #C transmits data #C on time-frequency resource #D, and cluster member #A receives data #C on time-frequency resource #D.

Optionally, before the cluster member #C sends the data #C on the time-frequency resource #D, the cluster member #C may also send SCI#2, where the SCI#2 is used to indicate the time-frequency resource #D.

The cluster member #A generates feedback information #B3 of the cluster member #A for the data #C sent by the cluster member #C according to whether it has correctly received (or correctly decoded) the data #C.

After that, the cluster member #A sends the feedback information #B3 to the cluster head #A on the time-frequency resource #B3 (ie, an example of the second resource).

In an implementation manner, the above-mentioned SCI#2 (or SCI#1) carries the indication information of the time-frequency resource #B3.

In another implementation manner, the network device may send the indication information of the time-frequency resource #B3 through high-layer signaling.

It should be noted that in this application, each cluster member in cluster #A that does not correctly receive data #A is the time-frequency resource (that is, the second resource) used when sending feedback information for data #C to cluster head #A. An example) may be the same or different, and is not particularly limited in the present application.

When each cluster member in cluster #A that does not correctly receive data #A uses the same time-frequency resource when sending the feedback information for data #C, that is, the above-mentioned time-frequency resource #B3, each cluster member can use the same time-frequency resource. Code division multiplexing, frequency division multiplexing or space division multiplexing etc. use the same time-frequency resource to transmit respective feedback information. In this case, the indication information of time-frequency resource #B3 may be carried in SCI#2 (or SCI#1), so that signaling overhead can be reduced.

When each cluster member in cluster #A that does not correctly receive data #A uses different frequency resources when sending feedback information for data #C, each cluster member can be carried in SCI #2 (or SCI #1) Indication information of the time-frequency resource used when sending the feedback information for data #C. In this case, the complexity of communication can be reduced.

By way of example and not limitation, the indication information of the time-frequency resource #B3 may include indication information of the time-domain position (denoted, time-domain position #B3) of the time-frequency resource #B3 and/or the indication information of the time-frequency resource #B3 Indication information of the frequency domain position (denoted as frequency domain position #B3).

In addition, the indication information of the time domain position #B3 can be used to indicate the relative position of the time domain position #B3, that is, the time interval between the time domain position #B3 and the reference time domain position (for example, t5 shown in FIG. 4 ) For example, the reference time domain position may include, but is not limited to, the sending time of SCI#2 (or, SCI#1), or the sending time of data #C (or, in other words, the PSSCH carrying data #C).

It should be understood that the specific content indicated by the indication information of the time domain position #B3 listed above is only an exemplary illustration, and the present application is not limited thereto. For example, the indication information of the time domain position #B3 can also be used to indicate the Absolute position of time domain position #B3.

After that, the cluster head #A can generate feedback information #A3 (ie, an example of the first feedback information) based on the feedback information for the data #C.

Therefore, the cluster head #A sends the feedback information #A3 to the network device on the time-frequency resource #A3 (ie, an example of the first resource).

The indication manner, content and sending process of the feedback information #A3 may be similar to those of the above-mentioned feedback information #A2, and detailed descriptions thereof are omitted here in order to avoid redundant descriptions.

Optionally, when at least one cluster member in the cluster #A does not correctly receive the data #C, the cluster head #A may also perform the retransmission process again.

For example, if the cluster head #A correctly receives the data #C, the cluster head #A can perform intra-cluster retransmission. This process is similar to the process shown in FIG. 3 , and its detailed description is omitted here to avoid redundant description.

Alternatively, if the cluster head #A correctly receives the data #C, it can also instruct the cluster member #D to retransmit the data #A, and the cluster member #D may be the cluster member that correctly receives the data #A, or the cluster member # D may be a cluster member that correctly receives data #B. The process is similar to the process shown in FIG. 3 , and its detailed description is omitted here in order to avoid redundant description.

The network device performs an operation according to the received feedback information #A3, and the process may be similar to the operation of the above-mentioned network device based on the feedback information #A2. Here, in order to avoid redundant description, the detailed description thereof is omitted.

In a possible implementation manner, the above-mentioned intra-cluster retransmission process shown in FIG. 3 or FIG. 4 may be repeated multiple times until all terminal devices in cluster #A correctly receive data #A or data #A Redundant version.

In another possible implementation manner, the intra-cluster retransmission process shown in FIG. 3 or FIG. 4 may be repeated multiple times until the data #A or the redundant version of the data #A is correctly received in the cluster #A. The number of terminal equipment is greater than or equal to the preset value #1. The value #1 can be configured by the network side to the terminal in the cluster through high-level signaling, or the value #1 can be sent to the terminal in the cluster by the network side through DCI, or the value #1 can be configured by the terminal in the cluster. The cluster head is determined.

In yet another possible implementation, the intra-cluster retransmission process shown in FIG. 3 or FIG. 4 can be repeated multiple times until the data #A or the redundant version of the data #A is correctly received in the cluster #A. The ratio of terminal equipment is greater than or equal to the preset value #2. The value #2 can be configured by the network side to the terminal in the cluster through high-level signaling, or the value #2 can be sent to the terminal in the cluster by the network side through DCI, or the value #2 can be configured by the cluster. First confirmed.

In yet another possible implementation, the intra-cluster retransmission process shown in Figure 3 or Figure 4 can be repeated multiple times until the number of repetitions reaches a preset threshold #1, and the threshold #1 can be configured by the network side through high-level signaling. To the terminal in the cluster, or the threshold #1 can be sent by the network side to the terminal in the cluster through DCI, or the threshold #1 can be determined by the cluster head.

In yet another possible implementation, the intra-cluster retransmission process shown in FIG. 3 or FIG. 4 may be repeated multiple times until the time length elapsed since the moment when DCI (or PDSCH) is received reaches a preset threshold. 2. The threshold #2 can be configured by the network side to the terminal in the cluster through high layer signaling, or the threshold #2 can be sent to the terminal in the cluster by the network side through DCI, or the threshold #2 can be determined by the cluster head.

For example, as shown in FIG. 3 or FIG. 4 , let the feedback information sent by the cluster head #A to the network device for the last time be feedback information #X, and let the transmission time of the feedback information #X be the same as the transmission time of the DCI (or PDSCH) The time interval of time and time is t4, and the indication information of t4 may be carried in the DCI.

For another example, the duration of t4 may also be specified by a communication protocol, or preconfigured by high-layer signaling.

It should be noted that, some or all of the above-mentioned t1 to t6 may have various possible values.

In this application, the multiple possible values may be maintained in the network device and the terminal device respectively. For example, the multiple possible values may be semi-statically configured by the network device. In this case, in the DCI or the SCI, the Carry the index corresponding to the current desired value.

In addition, as described above, the time window formed by the lapse of a specified period of time from the transmission time of the DCI (or PDSCH) may include multiple times for the cluster head #A to send feedback information to the network device, and the cluster head #A A and the network device may not need to transmit feedback information at every moment. For example, the feedback information sent by cluster head #A to the network device for the i-th time (i≥1) may include the i+1-th time to send feedback to the network device moment of information.

And, for example, the time of sending the feedback information to the network device for the i+1th time may be determined by the cluster head according to whether the cluster member on which the feedback information sent to the network device for the i-th time is based on correctly receives data.

Figures 5 and 6 show the transmission process of uplink data of the present application. As shown in Figures 5 and 6, when multiple terminal devices in cluster #1 need to send uplink data to the network device, at S210, the network device The DCI can be sent to each terminal device in cluster #1 by multicast (or broadcast). For example, the DCI may be carried on the PDCCH.

The DCI includes indication information of time-frequency resources of the PSSCH. That is, the time-frequency resource of the PSSCH is the time-frequency resource for each cluster member in cluster #1 to transmit uplink data to cluster head #1 for the first time.

In addition, the terminal equipment in cluster #1 can blindly detect DCI, and then determine the time-frequency resource of PSSCH according to the received DCI.

In S220, the cluster members in cluster #1 send their respective data to the cluster head (denoted, cluster head #1) in cluster #1 (wherein, the data is the data that needs to be sent to the network device via cluster head #1) ).

The process of sending uplink data by each cluster member is similar. Here, for ease of understanding, the process is described in detail by taking cluster member #1 as an example.

That is, cluster member #1 sends uplink data (denoted, data #1) to cluster head #1 on the time-frequency resource (denoted, time-frequency resource #1a) of the PSSCH indicated by the DCI.

Wherein, the above-mentioned DCI carries the indication information of the time-frequency resource #1a.

It should be noted that in this application, the time-frequency resources used by each cluster member in cluster #1 to send uplink data to cluster head #1 may be the same or different, which is not particularly limited in this application.

When the time-frequency resources used by each cluster member in cluster #1 to send uplink data to cluster head #1 are the same, that is, the above-mentioned time-frequency resource #1a, each cluster member can use code division multiplexing, frequency division The same time-frequency resource is used to transmit the respective feedback information by means of multiplexing or space division multiplexing. In this case, the indication information of the time-frequency resource #1a may be carried in the DCI, so that signaling overhead can be reduced.

In a possible implementation manner, the DCI may instruct the network device to allocate time-frequency resources to the cluster #1, and the cluster head #1 may inform each cluster member of the time-frequency resource allocation rules in advance, so that the cluster members can #1 can determine the time-frequency resource #1a from the time-frequency resources allocated to the cluster #1 according to the allocation rule.

When the time-frequency resources used by each cluster member in cluster #1 to send uplink data to cluster head #1 are different, the DCI may carry indication information of the time-frequency resource used by each cluster member when sending uplink data. In this case, the complexity of communication can be reduced.

As an example and not a limitation, the indication information of the time-frequency resource #1a may include indication information of the time-domain position (denoted, time-domain position #1a) of the time-frequency resource #1a and/or the indication information of the time-frequency resource #1a Indication information of the frequency domain position (denoted as frequency domain position #1a).

In addition, the indication information of the time domain position #1a can be used to indicate the relative position of the time domain position #1a, that is, the time interval (denoted, t a) of the time domain position #1a relative to the reference time domain position, for example , the reference time domain position may include, but is not limited to, the sending moment of the DCI.

It should be understood that the specific content indicated by the indication information of the time domain position #1a listed above is only an exemplary illustration, and the present application is not limited thereto. For example, the indication information of the time domain position #1a may also be used to indicate the Absolute position of time domain position #1a.

Therefore, the cluster head #1 can receive the uplink data sent by each cluster member.

When the uplink data sent by at least one cluster member is not correctly received by the cluster head #1, at S230, the cluster head #1 generates feedback information #2a.

The feedback information #2a is used to indicate that the uplink data sent by at least one cluster member in the cluster #1 is not correctly received by the cluster head #1.

At S240, the cluster head #A sends the feedback information #2a to the network device on the time-frequency resource #2a.

Wherein, the above-mentioned DCI carries the indication information of the time-frequency resource #2a.

By way of example and not limitation, the indication information of the time-frequency resource #2a may include indication information of the time-domain position (denoted, time-domain position #2a) of the time-frequency resource #2a and/or the indication information of the time-frequency resource #2a Indication information of the frequency domain position (denoted as frequency domain position #2a).

And, the indication information of the time domain position #2a can be used to indicate the relative position of the time domain position #2a, that is, the time interval (denoted, t b) of the time domain position #2a relative to the reference time domain position, for example , the reference time domain position may include, but is not limited to, the sending moment of the DCI.

It should be understood that the specific content indicated by the indication information of the time domain position #2a listed above is only an exemplary illustration, and the present application is not limited to this. For example, the indication information of the time domain position #2a can also be used to indicate the The absolute position of time domain position #2a.

In this application, the indication information of the time domain position #1a and the indication information of the time domain position #2a may be indicated by the same information (denoted, information #2). That is, when the cluster head #1 reads the information #2 from the DCI, it is considered that the information #2 indicates the time domain position #2a; when the cluster member #A reads the information #2 from the DCI, it can be considered that the information #2 #2 indicates time domain position #1a.

In a possible implementation manner, there are P possible situations for the time domain position (for example, the time domain position relative to the time interval of DCI) of the time-frequency resource for which the cluster head sends the feedback information to the network device, and the cluster members There are Q possible situations for the time domain position of the time-frequency resource for sending uplink data to the cluster head (for example, the time domain position relative to the time interval of the DCI). That is, the P cases and Q cases constitute P·Q possible combinations.

In this case, an entry 3 may be stored in the network device, and the entry 3 may store a one-to-one correspondence between P·Q possible combinations and P·Q indices.

In addition, in the cluster head #1, table entry 3 may be stored, or in the cluster head #1, the time-frequency resources of the time-frequency resources for sending feedback information to the network device by the cluster head corresponding to each index in the P·Q indices may be stored in the cluster head #1. Time domain location (ie, one of the P possible locations above).

In addition, in each cluster member, table entry 3 may be stored, or, in the cluster member, the time domain of the time-frequency resource for sending uplink data to the cluster head by the cluster member corresponding to each of the P·Q indices may be stored in the cluster member position (ie, one of the Q possible positions above).

Therefore, the network device can determine the index (denoted, index #C) corresponding to the combination (denoted as, combination #C) composed of time-domain location #1a and time-domain location #2a according to table entry #3. And carry index #C to DCI.

Further, the cluster head #1 can determine the index #C from the stored table entry, and then determine the time domain position #2a, and the cluster member #1 can determine the index #C from the saved table entry, and then determine the time domain position #2 1a.

The indication information of the frequency domain location #1a and the indication process of the frequency domain location #1b may be similar to the indication processes of the time domain location #1a and the time domain location #2a, and detailed descriptions thereof are omitted here to avoid redundant description.

At S250, the network device waits for an intra-cluster retransmission process for uplink data in cluster #1 according to the received feedback information #2a.

Hereinafter, the intra-cluster retransmission process will be described in detail.

In the following, for ease of understanding and description, it is assumed that the uplink data (that is, data #1) sent by cluster member #1 is not correctly received by cluster head #1, and the action of cluster member #1 in the retransmission process is taken as an example, The retransmission process is described.

In S260, the cluster head #1 may send an SCI, where the SCI includes time-frequency resources of the PSSCH, and the PSSCH is used to carry the retransmission of the cluster members (eg, cluster member #1) that are not correctly receiving the uplink data by the cluster head #1 For the convenience of understanding, the uplink data retransmitted by cluster member #1 is recorded as data #2, then the data #2 can be the data #1, or the data #2 can also be the redundancy of the data #1 Version.

For example, the SCI may carry the identifiers of cluster members including cluster member #1 that have not correctly received uplink data by cluster head #1, so that each cluster member in cluster #1 determines whether their own identifiers are carried in the SCI middle. If the determination result is "Yes", it can be determined that it is the receiving end of the SCI (or the SCI needs to be parsed), and the uplink data needs to be sent (or retransmitted) based on the indication of the SCI.

In one implementation, cluster members within cluster #1 can blindly detect SCI.

Therefore, cluster member #1 sends data #2 on the time-frequency resource (time-frequency resource #1b) indicated by the SCI for cluster member #1 to retransmit uplink data, and cluster head #1 receives data on time-frequency resource #1b #2.

It should be noted that the time-frequency resources used by each cluster member when retransmitting uplink data may be the same or different, which is not particularly limited in this application.

In an implementation manner, there is a specified time interval (denoted as t c ) between the time domain position of the time-frequency resource #1b and the transmission moment of the SCI, and the t c may be specified by the communication protocol, or , the t c may also be pre-indicated by the network device or cluster head #1.

When the uplink data sent by each cluster member in cluster #1 is correctly received, cluster head #1 sends a PUSCH to the network device at S270, and the PUSCH includes the uplink data of each terminal device in cluster #1 that needs to send uplink data .

When the uplink data sent by at least one cluster member is not correctly received by the cluster head #1, at S280, the cluster head #1 generates feedback information #2b.

The feedback information #2b is used to indicate that the uplink data sent by at least one cluster member in the cluster #1 is not correctly received by the cluster head #1.

And, the cluster head #A sends the feedback information #2b to the network device on the time-frequency resource #2b.

In an implementation manner, the above-mentioned DCI carries the indication information of the time-frequency resource #2b. In addition, the content and form indicated by the indication information of the time-frequency resource #2b are similar to the indication information of the time-frequency resource #2a, and the detailed description thereof is omitted here to avoid redundant description.

In another implementation manner, there is a predetermined time interval (denoted, t d ) between the time domain position of the time-frequency resource #2b and the time domain position of the time-frequency resource #2a.

For example, the t d is the same as t b, that is, in this application, multiple intra-cluster retransmissions may occur. In this case, the time domain resources for the cluster head #1 to send feedback information to the network device appear periodically, Thus, signaling overhead can be reduced.

Alternatively, the indication information of t d may be carried in the DCI.

In a possible implementation manner, the above-mentioned intra-cluster retransmission process shown in FIG. 5 may be repeated many times until cluster head #1 correctly receives the uplink data sent by all terminal devices that need to send uplink data.

In another possible implementation manner, the above-mentioned intra-cluster retransmission process shown in FIG. 5 can be repeated many times until the number of cluster members whose uplink data is correctly received by the cluster head #1 is greater than or equal to the specified threshold a, The threshold a can be configured by the network side to the terminal in the cluster through high layer signaling, or the threshold a can be sent to the terminal in the cluster by the network side through DCI, or the threshold a can be determined by the cluster head.

In another possible implementation manner, the retransmission process within the cluster shown in the above Figure 5 can be repeated many times until the proportion of the cluster members whose uplink data is correctly received by the cluster head #1 is greater than or equal to the specified threshold. b. The threshold b can be configured by the network side to the terminal in the cluster through high layer signaling, or the threshold b can be sent to the terminal in the cluster by the network side through DCI, or the threshold b can be determined by the cluster head.

In another possible implementation manner, the intra-cluster retransmission process shown in FIG. 5 can be repeated many times until the number of repetitions reaches a preset threshold #a, and the threshold #a can be configured by the network side to the intra-cluster through high-level signaling. The terminal, or the threshold #a can be sent by the network side to the terminal in the cluster through DCI, or the threshold #a can be determined by the cluster head.

In another possible implementation manner, the intra-cluster retransmission process shown in FIG. 5 can be repeated many times until the time length elapsed since the moment when the DCI is received reaches a preset threshold #b, and the threshold #b can be determined by the network. The side is configured to the terminal in the cluster through high layer signaling, or the threshold #b can be sent to the terminal in the cluster by the network side through DCI, or the threshold #b can be determined by the cluster head.

For example, suppose that the time interval between the latest time when the cluster head #1 sends the PDSCH to the network device and the time when the DCI is sent is te, then the DCI can carry the indication information of te.

For another example, the duration of te may also be predetermined by a communication protocol or high-layer signaling.

It should be noted that, some or all of the above-mentioned ta to te may have various possible values.

In the prior art, a terminal device is configured to send a configured scheduled (configured grant, CG) PUSCH resource through higher layer signaling, such as RRC signaling, including type 1 (Type1) and type 2 (Type2).

In Type 1, only RRC signaling is used to configure unlicensed resources, and DCI is not required for resource configuration and activation transmission.

In Type 2, RRC signaling and DCI need to be used to configure unlicensed resources, where RRC signaling is used to configure parameters including period, and DCI is used for activation, deactivation, and configuration, frequency domain resources, etc. parameter, the terminal can use the configured license-free transmission resources only after receiving the DCI.

In the SCI of this application, Field C and Field D may be included.

Wherein, field D includes the identifiers of one or more terminal devices.

The information carried in field C is used to indicate whether the terminal device indicated by the identifier included in field D is a sender or a receiver of data.

For a terminal device (denoted, terminal device #X), if the information carried in field C indicates "send", then

When field D includes the identification of terminal device #X, terminal device #D activates the CG, and sends a CG data packet according to the high-level configuration and the resources in the SCI.

When the identifier of the terminal device #X is not included in the field D, the terminal device #D has no action, or in other words, the terminal device #D does not activate the CG. Optionally, terminal device #X can monitor CG data packets sent by other terminal devices.

If the information carried by field C indicates "received", then

When the field D includes the identification of the terminal device #X, the terminal device #D needs to receive the CG data packet.

When the field D does not include the identity of the terminal device #X, the terminal device #D has no action.

FIG. 7 is a schematic block diagram of a wireless communication apparatus provided by an embodiment of the present application. As shown in FIG. 7 , the apparatus 300 may include a communication unit 310 and a processing unit 320 . The communication unit 310 can communicate with the outside, and the processing unit 320 is used for data processing. The communication unit 310 may also be referred to as a communication interface or a transceiving unit.

In a possible design, the apparatus 300 may implement steps or processes corresponding to those performed by the network device in the above method embodiments, wherein the processing unit 320 is configured to perform processing related to the network device in the above method embodiments. In operation, the communication unit 310 is configured to perform the operations related to the transmission and reception of the network device in the above method embodiments.

In yet another possible design, the apparatus 300 may implement the steps or processes performed by the cluster head terminal device (eg, cluster head #A or cluster head #1) corresponding to the above method embodiments, wherein the communication unit 310 is configured to perform the operations related to the sending and receiving of the cluster head terminal device in the above method embodiments, and the processing unit 320 is configured to perform the operations related to the processing of the cluster head terminal device in the above method embodiments.

In yet another possible design, the apparatus 300 may implement the steps or processes performed by the cluster member terminal equipment (eg, cluster member #A, cluster member #C, or cluster member #1) corresponding to the above method embodiments. , wherein the communication unit 310 is configured to perform the operations related to the sending and receiving of the cluster member terminal equipment in the above method embodiments, and the processing unit 320 is configured to perform the processing related operations of the cluster member terminal equipment in the above method embodiments.

It should be understood that the apparatus 300 here is embodied in the form of functional units. The term "unit" as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor for executing one or more software or firmware programs (eg, a shared processor, a dedicated processor, or a group of processors, etc.) and memory, merge logic, and/or other suitable components to support the described functions. In an optional example, those skilled in the art can understand that the apparatus 300 may be specifically the network device in the foregoing embodiment, and may be used to execute each process and/or step corresponding to the network device in the foregoing method embodiment, or, The apparatus 300 may be specifically the cluster head terminal equipment in the above-mentioned embodiments, and may be used to execute each process and/or step corresponding to the cluster head terminal equipment in the above-mentioned method embodiments, or the apparatus 300 may be specifically the above-mentioned embodiments. The cluster member terminal equipment can be used to execute each process and/or step corresponding to the cluster member terminal equipment in the above method embodiments, and to avoid repetition, details are not described herein again.

The apparatus 300 in each of the above solutions has the function of implementing the corresponding steps performed by the network equipment in the above method, or the apparatus 300 in each of the above solutions has the function of implementing the corresponding steps performed by the cluster head terminal device in the above method, or, each of the above The apparatus 300 of the solution has the function of implementing the corresponding steps performed by the terminal device of the cluster member in the above method. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the communication unit may be replaced by a transceiver (for example, the transmitting unit in the communication unit may be replaced by a transmitter, and the receiving unit in the communication unit may be replaced by a receiving unit). machine replacement), other units, such as a processing unit, etc., may be replaced by a processor, respectively, to perform the transceiver operations and related processing operations in each method embodiment.

In addition, the above-mentioned communication unit may also be a transceiver circuit (for example, may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit. In the embodiment of the present application, the apparatus in FIG. 7 may be the network device or terminal device in the foregoing embodiment, or may be a chip or a chip system, such as a system on chip (system on chip, SoC). Wherein, the communication unit may be an input/output circuit or a communication interface; the processing unit is a processor, a microprocessor or an integrated circuit integrated on the chip. This is not limited.

FIG. 8 shows a wireless communication apparatus 400 provided by an embodiment of the present application. The apparatus 400 includes a processor 410 and a transceiver 420 . The processor 410 and the transceiver 420 communicate with each other through an internal connection path, and the processor 410 is configured to execute instructions to control the transceiver 420 to send and/or receive signals.

Optionally, the apparatus 400 may further include a memory 430, and the memory 430 communicates with the processor 410 and the transceiver 420 through an internal connection path. The memory 430 is used to store instructions, and the processor 410 can execute the instructions stored in the memory 430 . In a possible implementation manner, the apparatus 400 is configured to implement each process and step corresponding to the network device in the foregoing method embodiments. In another possible implementation manner, the apparatus 400 is configured to implement various processes and steps corresponding to the terminal equipment (eg, cluster head terminal equipment or cluster member terminal equipment) in the foregoing method embodiments.

It should be understood that the apparatus 400 may specifically be a network device or a terminal device in the foregoing embodiments, and may also be a chip or a chip system. Correspondingly, the transceiver 420 may be a transceiver circuit of the chip, which is not limited herein.

Optionally, the memory 430 may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor 410 may be configured to execute the instructions stored in the memory, and when the processor 410 executes the instructions stored in the memory, the processor 410 is configured to execute each step of the above-mentioned method embodiment corresponding to the network device or the terminal device and/or process.

In the implementation process, each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.

It should be noted that the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method embodiment may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The aforementioned processors may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components . The processor in the embodiments of the present application may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

FIG. 9 shows a wireless communication apparatus 500 provided by an embodiment of the present application. The apparatus 500 includes a processing circuit 510 and a transceiver circuit 520 . The processing circuit 510 and the transceiver circuit 520 communicate with each other through an internal connection path, and the processing circuit 510 is used for executing instructions to control the transceiver circuit 520 to send and/or receive signals.

Optionally, the apparatus 500 may further include a storage medium 530, and the storage medium 530 communicates with the processing circuit 510 and the transceiver circuit 520 through an internal connection path. The storage medium 530 is used for storing instructions, and the processing circuit 510 can execute the instructions stored in the storage medium 530 . In a possible implementation manner, the apparatus 500 is configured to implement each process and step corresponding to the network device in the foregoing method embodiments. In another possible implementation manner, the apparatus 500 is configured to implement various processes and steps corresponding to the terminal equipment (eg, cluster head terminal equipment or cluster member terminal equipment) in the above method embodiments.

FIG. 10 is a schematic structural diagram of a terminal device 600 provided by this application. Any one of the foregoing apparatuses 300 to 500 may be configured in the terminal device 600 , or any one of the foregoing apparatuses 300 to 500 may itself be the terminal device 600 . In other words, the terminal device 600 may perform the actions performed by the terminal device (for example, the cluster head terminal device or the cluster member terminal device) in any of the methods shown in FIG. 2 to FIG. 6 above.

For the convenience of explanation, FIG. 10 only shows the main components of the terminal device. As shown in FIG. 10 , the terminal device 600 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

The processor is mainly used to process communication protocols and communication data, and to control the entire terminal device, execute software programs, and process data of the software programs, for example, for supporting the terminal device to execute the above-mentioned transmission precoding matrix instruction method embodiment. the described action. The memory is mainly used to store software programs and data, such as the codebook described in the above embodiments. The control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. The control circuit together with the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

When the terminal device is powered on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.

It can be understood by those skilled in the art that, for the convenience of description, FIG. 10 only shows one memory and a processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.

For example, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processing unit is mainly used to control the entire terminal device, execute software programs, and process software programs. data. The processor in FIG. 10 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as a bus. Those skilled in the art can understand that a terminal device may include multiple baseband processors to adapt to different network standards, a terminal device may include multiple central processors to enhance its processing capability, and various components of the terminal device may be connected through various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

As shown in FIG. 10 , the terminal device 600 includes a transceiver unit 610 and a processing unit 620 . The transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like. Optionally, the device for implementing the receiving function in the transceiver unit 610 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 610 may be regarded as a transmitting unit, that is, the transceiver unit includes a receiving unit and a transmitting unit. Exemplarily, the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, and the like, and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like. Exemplarily, in this embodiment of the present application, an antenna and a control circuit with a transceiver function may be regarded as the transceiver unit 610 of the terminal device 600 , and a processor with a processing function may be regarded as the processing unit 620 of the terminal device 600 .

FIG. 11 is a schematic structural diagram of a network device 700 according to an embodiment of the present application, which may be used to implement the functions of the network device in the foregoing method. The network device 700 includes one or more radio frequency units, such as a remote radio unit (RRU) 910 and one or more baseband units (BBU) (also referred to as digital units, digital units, DUs) 920. The RRU 910 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 911 and a radio frequency unit 912 . The RRU910 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals to baseband signals, for example, for sending the signaling messages described in the above embodiments to terminal equipment. The part of the BBU920 is mainly used to perform baseband processing and control the base station. The RRU 910 and the BBU 920 may be physically set together or physically separated, that is, a distributed base station.

The BBU920 is the control center of the base station, which can also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spectrum spreading. For example, the BBU (processing unit) 920 may be used to control the network device to execute the operation flow of the network device in the foregoing method embodiments.

In an example, the BBU920 may be composed of one or more single boards, and the multiple single boards may jointly support a wireless access network of a single access standard (such as an LTE system or a 5G system), or may support different access modes respectively. into the standard wireless access network. The BBU 920 also includes a memory 921 and a processor 922 . The memory 921 is used to store necessary instructions and data. For example, the memory 921 stores the codebook and the like in the above-described embodiments. The processor 922 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation flow of the network device in the foregoing method embodiments. The memory 921 and processor 922 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.

In a possible implementation, with the development of system-on-chip (SoC) technology, all or part of the functions of part 920 and part 910 can be implemented by SoC technology, for example, a network device function Chip implementation, the network device function chip integrates a processor, a memory, an antenna interface and other devices, the program of the network device-related function is stored in the memory, and the processor executes the program to realize the network device-related function. Optionally, the network device function chip can also read a memory outside the chip to implement related functions of the network device.

It should be understood that the structure of the network device illustrated in FIG. 11 is only a possible form, and should not constitute any limitation to the embodiments of the present application. This application does not exclude the possibility of other forms of network device structures that may appear in the future.

According to the method provided by the embodiment of the present application, the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on a computer, the computer is made to execute the steps shown in FIGS. 2 to 6 . method in any of the embodiments.

According to the method provided by the embodiments of the present application, the present application further provides a computer-readable medium, where the computer-readable medium stores program codes, and when the program codes are run on a computer, the computer is made to execute the programs shown in FIGS. 2 to 6 . method in any of the embodiments.

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a communication system, which includes the aforementioned access device and multiple terminal devices, wherein the multiple terminal devices form a cluster, and the cluster includes a cluster head Terminal devices and one or more cluster member terminal devices.

It should be understood that, in this embodiment of the present application, the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), dedicated integrated Circuit (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (DRAM) Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Fetch memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented in software, the above-described embodiments 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 or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server or data center by wire (eg, 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, or the like that contains one or more sets of available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media. The semiconductor medium may be a solid state drive.

It should be understood that the term "and/or" in this document is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time , there are three cases of B alone. Furthermore, the terms "at least one of" or "at least one of" or similar expressions herein mean any combination of the listed items, eg, at least one of A, B, and C (or At least one of A, B or C), can mean: A alone exists, B alone exists, C alone exists, A and B exist simultaneously, A and C exist simultaneously, B and C exist simultaneously, A, B and C these seven situations. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, which may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A wireless communication method, characterized in that the method comprises:

The network device sends downlink control information, the downlink control information includes one or more first resource indication information and second resource indication information, and each first resource includes information for the cluster head terminal device to send to the network device. The resource of the first feedback information of the first data, the second resource includes the resource for the cluster member terminal device to send the second feedback information for the first data to the cluster head terminal device, the first feedback information is determined based on the second feedback information;

sending, by the network device, the first data;

The network device receives the first feedback information on one of the one or more first resources.
The method according to claim 1, wherein the downlink control information includes a first field,

In the case that the cluster head terminal device is the receiver of the downlink control information, the information carried in the first field is the indication information of the first resource,

When the cluster member terminal device is the receiver of the downlink control information, the information carried in the first field is the indication information of the second resource.
The method according to claim 1 or 2, wherein the first feedback information is feedback information received by the network device for the i-th time, i≥1, and

The first feedback information further includes information used to determine the resource for the network device to receive the first feedback information for the i+jth time, where j≥1.
The method according to any one of claims 1 to 3, wherein the plurality of first resources are distributed periodically.
The method according to any one of claims 1 to 4, wherein the downlink control information further includes at least one of the following information:

Information of the first period, information of the first quantity, information of the period of the first resource, wherein

The first time period is a time period that has elapsed since the moment when the downlink control information was sent, or

the first time period is used to determine the time range of the plurality of first resources;

The first quantity is the quantity of the plurality of first resources.
A wireless communication method, characterized in that the method comprises:

The cluster head terminal device receives downlink control information, the downlink control information includes one or more first resource indication information and second resource indication information, and each first resource includes information for the cluster head terminal device to send to the network device sending resources for the first feedback information for the first data, the second resources include resources for the cluster member terminal equipment to send the second feedback information for the first data to the cluster head terminal equipment;

The cluster head terminal device receives the first data;

The cluster head terminal device receives the second feedback information in the second resource;

The cluster head terminal device determines the first feedback information according to the second feedback information;

The cluster head terminal device sends the first feedback information on one of the one or more first resources.
The method according to claim 6, wherein the downlink control information includes a first field,

In the case that the cluster head terminal device is the receiver of the downlink control information, the information carried in the first field is the indication information of the first resource,

When the cluster member terminal device is the receiver of the downlink control information, the information carried in the first field is the indication information of the second resource.
The method according to claim 6 or 7, wherein when the second feedback information sent by one or more first cluster member terminal devices indicates that the first data is not correctly received, the method further comprises:

The cluster head terminal device retransmits the first data; or

The cluster head terminal device instructs one or more second cluster member terminal devices to retransmit the first data, wherein the second cluster member terminal device is the cluster member terminal device that sent the second feedback information, and the The second feedback information indicates that the first data is correctly received.
The method according to claim 8, wherein the method further comprises:

The cluster head terminal device sends sideline control information, where the sideline control information is used to indicate a third resource, and the third resource is used for retransmission of the first data.
The method according to claim 8 or 9, wherein the method further comprises:

The cluster head terminal device receives third feedback information for the retransmitted first data.
The method according to any one of claims 8 to 10, wherein the method further comprises:

The cluster head terminal device sends sideline control information, where the sideline control information includes a second field, and the second field includes an identifier of the terminal device that is the sender of the retransmission of the first data.
The method according to any one of claims 8 to 10, wherein the method further comprises:

The cluster head terminal device sends sideline control information, the sideline control information includes a third field and a fourth field, the three fields include the identifiers of one or more third cluster member terminal devices, and the fourth field The information carried is used to indicate whether the third cluster member device acts as a sender or a receiver of retransmission of the first data.
The method according to any one of claims 6 to 12, wherein the first feedback information is feedback information sent by the cluster head terminal device for the i-th time, i≥1, and

The first feedback information further includes information used to determine the resource for the i+jth sending of the first feedback information by the cluster head terminal device, where j≥1.
The method according to any one of claims 6 to 13, wherein the plurality of first resources are distributed periodically.
The method according to any one of claims 6 to 14, wherein the downlink control information further includes at least one of the following information:

Information of the first period, information of the first quantity, information of the period of the first resource, wherein

The first time period is a time period that has elapsed since the moment when the downlink control information was sent, or

the first time period is used to determine the time range of the plurality of first resources;

The first quantity is the quantity of the plurality of first resources.
A wireless communication method, characterized in that the method comprises:

The first cluster member terminal equipment receives downlink control information, the downlink control information includes one or more indication information of the first resource and indication information of the second resource, and each first resource includes information for the cluster head terminal equipment to send to the The network device sends resources for the first feedback information for the first data, and the second resources include resources for the cluster member terminal device to send the second feedback information for the first data to the cluster head terminal device;

The first cluster member terminal device receives the first data;

The first cluster member terminal device sends the second feedback information on the second time-frequency resource.
The method according to claim 16, wherein the downlink control information comprises a first field;

The method also includes:

The first cluster member terminal device determines the second resource according to the information carried in the first field.
The method according to claim 16 or 17, wherein when the first cluster member terminal device does not correctly receive the first data, the method further comprises:

The first cluster member terminal device receives the first data retransmitted by the cluster head terminal device or other cluster member terminal devices.
The method of claim 18, wherein the method further comprises:

The first cluster member terminal device sends third feedback information for the retransmitted first data to the cluster head terminal device.
The method according to claim 16 or 17, wherein when the first cluster member terminal device correctly receives the first data, the method further comprises:

The first cluster member terminal device retransmits the first data to a third cluster member terminal device, wherein the third cluster member terminal device includes a cluster member terminal device that does not correctly receive the first data.
The method according to any one of claims 18 to 20, wherein the method further comprises:

The first cluster member terminal device receives sideline control information, where the sideline control information is used to indicate a third resource, and the third resource is used for retransmission of the first data.
The method according to any one of claims 18 to 21, wherein the method further comprises:

The first cluster member terminal device receives sideline control information, where the sideline control information includes a second field, and the second field includes an identifier of the terminal device that is the sender of the retransmission of the first data.
The method according to any one of claims 18 to 22, wherein the method further comprises:

The first cluster member terminal device receives sideline control information, the sideline control information includes a third field and a fourth field, the three fields include one or more identifiers of the third cluster member terminal device, and the first cluster member terminal device. The information carried in the four fields is used to indicate whether the third cluster member device acts as a sender or a receiver of retransmission of the first data.
A device for wireless communication, comprising:

A unit for implementing the method of any one of claims 1 to 5; or

A unit for implementing the method of any one of claims 6 to 15; or

A unit for implementing the method of any one of claims 16 to 23.
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program runs,

causing the apparatus to perform the method of any one of claims 1 to 5, or

causing the apparatus to perform a method as claimed in any one of claims 6 to 15, or

The apparatus is caused to perform a method as claimed in any one of claims 16 to 23.
A chip system is characterized by comprising: a processor for calling and running a computer program from a memory,

causing a communication device mounted with the chip system to perform the method of any one of claims 1 to 5; or

causing a communication device mounted with the chip system to perform the method of any one of claims 6 to 15; or

A communication device mounted with the chip system is caused to perform the method as claimed in any one of claims 16 to 23 .
A communication system, characterized in that it includes:

a network device for performing the method according to any one of claims 1 to 5;

A cluster head terminal device for performing the method according to any one of claims 6 to 15;

At least one cluster member terminal device for performing the method according to any one of claims 16 to 23.