WO2021134659A1

WO2021134659A1 - Method and device for relay transmission

Info

Publication number: WO2021134659A1
Application number: PCT/CN2019/130888
Authority: WO
Inventors: 科莱恩保罗·瓦朗特; 张磊; 李立英; 伊姆兰穆罕默德; 苏宏家
Original assignee: 华为技术有限公司
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-07-08
Also published as: CN115280806A

Abstract

The present application relates to a method and device for relay transmission, applicable in the technical field of V2X communication. A second terminal device and a first communication device belong to a first communication group, terminal devices of the communication group are candidate terminal devices used for relaying the transmission of data to a third terminal device, the second terminal device acquires a first parameter from a first terminal device and, by comparing the first parameter with a first value, determines whether the first terminal device satisfies a service requirement, thus determining whether the first terminal device can be used for relay transmission to the third terminal device. The second terminal device, by determining whether the terminal devices in the communication group satisfy the service requirement to select a terminal device for use in relay transmission, reduces additional delays and resource overhead brought forth by the reselection of a relay terminal device and the need to reestablish a link.

Description

Method and equipment for relay transmission

Technical field

This application relates to the field of communication technologies, and in particular, to a method and equipment for relay transmission.

Background technique

Device to device (D2D) communication, vehicle to vehicle (V2V) communication, vehicle to pedestrian V2P (Vehicle to Pedestrian, V2P) communication, or vehicle to infrastructure/network V2I/N (Vehicle to Infrastructure/ Network (V2I/N) communication is a technology for direct communication between terminal devices. The link between terminal devices is defined as a side link (Sidelink, SL), and its air interface (Air Interface) is also Called PC-5 air interface. The link between the terminal device and the network device is called a downlink (Downlink, DL) or an uplink (Uplink, UL), and its air interface is also called a Uu air interface. V2V, V2P, and V2I/N are collectively referred to as V2X, that is, the car communicates with everything.

Taking V2X communication as an example, a terminal device is used to forward data from a source terminal device to a target terminal device or network device through a side link, and this type of terminal device is called a relay terminal device. When the quality of the link between the relay terminal device and the target terminal device or the target network device is not good, the relay transmission performance decreases, resulting in the reselection of the relay terminal device and the need to re-establish the link. The transmission delay and resources of this process The overhead is very large and cannot meet the relay transmission requirements.

Summary of the invention

The embodiments of the present application provide a relay transmission method and device, which can reduce the delay and resource overhead of the relay transmission.

In the first aspect, a relay transmission method is provided. The method can be executed by a second terminal device or a chip of the second terminal device. The method includes: the second terminal device obtains the first parameter from the first terminal device, and the second terminal device obtains the first parameter from the first terminal device. A parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is resource information used for relay transmission to a third terminal device; the first terminal device and the second terminal device Belongs to the first communication group, and the terminal devices in the first communication group are candidate terminal devices for relay transmission to the third terminal device; the second terminal device is determined according to the first parameter and the first value Whether the first terminal device is used for relay transmission to the third terminal device.

Through the embodiments of the present application, multiple terminal devices are divided into a communication group, the terminal devices in the communication group are candidate terminal devices for relay, and the communication group is used for relaying and transmitting data to a third terminal device. The second terminal device is a group head, the first terminal device is a group member or group head, and the first terminal device may be the same as the second terminal device. The second terminal device obtains the first parameter from the first terminal device, and compares the first parameter with the first value to determine whether the first terminal device meets the current service requirements. For example, the service requirement may refer to the reliability of the relay transmission service. Or the size of the resources occupied by the relay transmission. In this way, it is determined whether the first terminal device can be used for relay transmission to the third terminal device. The second terminal device selects the terminal device for relay transmission by judging whether the terminal device in the communication group meets the current service requirements, which can reduce the extra costs caused by reselecting the relay terminal device and the need to re-establish the link. Delay and resource overhead.

In a possible design, the transmission resource information includes at least one of transmission window resource information and retransmission resource information. The retransmission resource information can be used to indicate the size of the data that needs to be retransmitted when the first terminal device performs relay transmission, so that the first parameter size of the first terminal device can be used to indicate the reliability of the first terminal device's relay transmission service Or whether the relay transmission of the first terminal device occupies too many resources. .

In a possible design, the first parameter includes at least one of a second value and a third value, wherein the second value is used to indicate the transmission window resource information, and the third value is used to indicate The retransmission resource information. The transmission window resource information and the retransmission resource information can be embodied by specific numerical values.

In a possible design, when the third value is less than or equal to the first value, the second terminal device determines that the first terminal device is used for relay transmission to the third terminal device. The third value is less than or equal to the first value, indicating that when the first terminal performs relay transmission, less data needs to be retransmitted. Therefore, the delay caused by retransmission and the consumption of retransmission resources are both small. The device can be used for relay transmission.

In a possible design, when the third value is greater than the first value, the second terminal device determines that the first terminal device is not used for relay transmission. The third value is greater than the first value, indicating that when the first terminal performs relay transmission, more data needs to be retransmitted. Therefore, due to the large delay and retransmission resource consumption caused by retransmission, the first terminal device is not used for Perform relay transmission.

In a possible design, the second terminal device sends first resource scheduling information to the first terminal device, and the first resource scheduling information is used by the first terminal device to determine the first resource, and the first resource A resource is used for the first terminal device to relay and transmit data to the third terminal device. The second terminal device is the group head terminal device in the first communication group, and has the capability of resource scheduling. When the first terminal device is used to relay data to the third terminal device, the second terminal device is the first terminal device Scheduling or allocating the first resource for relay transmission.

In a possible design, when the first terminal device and the second terminal device are the same terminal device, the second terminal device determines the first resource, and the second terminal device forwards the information to the first resource. The third terminal device relays and transmits data. When the group head terminal device is used for relay transmission, the relay transmission is performed on the first resource.

In a possible design, the second terminal device receives second resource scheduling information from the network device, and the second resource scheduling information is used to determine the first resource; and/or the second terminal device independently selects and determines the first resource One resource. When there is network equipment coverage, the group head terminal device obtains the first resource for relay transmission from the network device; when there is no network equipment coverage, the group head terminal device determines the first resource for relay transmission through independent resource selection .

In a possible design, the second terminal device obtains the first terminal device from the first terminal device through at least one of radio resource control signaling, a media access control control unit, side-line control information, or side-line feedback control information. The first parameter.

In a possible design, the first value is predefined; or the second terminal device obtains the first value from a network device; or the second terminal device autonomously determines the first value; or The second terminal device obtains the first value from the third terminal device.

In a second aspect, a relay transmission method is provided. The method may be executed by a first terminal device or a chip of the first terminal device. The method includes: the first terminal device determines a first parameter, and the first parameter is used to indicate The transmission resource information of the first terminal device, where the transmission resource information is resource information used for relay transmission to a third terminal device; the first terminal device sends the first parameter to the second terminal device; The first terminal device and the second terminal device belong to a first communication group, and the terminal devices in the first communication group are candidate terminal devices used for relay transmission to a third terminal device.

In a possible design, the transmission resource information includes at least one of transmission window resource information and retransmission resource information.

In a possible design, the first parameter includes at least one of a second value and a third value, wherein the second value is used to indicate the transmission window resource information, and the third value is used for Indicate the retransmission resource information.

In a possible design, the first terminal device receives first resource scheduling information from the second terminal device, and the first resource scheduling information is used by the first terminal device to determine the first resource, and the The first resource is used for the first terminal device to relay and transmit data to the third terminal device.

The relay transmission method of the second aspect may refer to the implementation described in the method of the first aspect above, and use the same or similar technical means to achieve the same or similar technical effect, and details are not repeated here.

In a third aspect, a second terminal device is provided, and the second terminal device is configured to execute the foregoing first aspect or the method in any possible implementation manner of the first aspect. Specifically, the second terminal device may include a module for executing the method in the first aspect or any possible implementation of the first aspect, for example, including: an acquisition module, which is used to acquire the first parameter , The first parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is resource information used for relay transmission to a third terminal device; the first terminal device and the The second terminal device belongs to the first communication group, and the terminal device in the first communication group is a candidate terminal device for relay transmission to the third terminal device; A parameter and a first value determine whether the first terminal device is used for relay transmission to a third terminal device.

In a possible design, when the third value is less than or equal to the first value, the determining module determines that the first terminal device is used for relay transmission to the third terminal device.

In a possible design, when the third value is greater than the first value, the determining module determines that the first terminal device is not used for relay transmission.

In a possible design, the second terminal device further includes a transceiver module, and the transceiver module is configured to send first resource scheduling information to the first terminal device, and the first resource scheduling information is used for the The first terminal device determines a first resource, where the first resource is used by the first terminal device to relay and transmit data to the third terminal device.

In a possible design, when the first terminal device and the second terminal device are the same terminal device, the determining module is further configured to determine the first resource, and the second terminal device further includes a transceiver module , The transceiving module is configured to relay and transmit data to the third terminal device on the first resource.

In a possible design, the second network device further includes a transceiver module, the transceiver module is configured to receive second resource scheduling information from the network device, and the second resource scheduling information is used to determine the first resource; and /Or the determining module is also used to determine the first resource.

In a possible design, the acquiring module is further configured to acquire from the first terminal device through at least one of radio resource control signaling, media access control control unit, side-line control information, or side-line feedback control information. The first parameter.

In a possible design, the first value is predefined; or the obtaining module is further used to obtain the first value from a network device; or the determining module is further used to autonomously determine the first value. Numerical value; or the acquiring module is further configured to acquire the first numerical value from the third terminal device.

The second terminal device of the third aspect may refer to the implementation manner set forth in the method of the first aspect above, and use the same or similar technical means to achieve the same or similar technical effect, and details are not repeated here.

In a fourth aspect, a first terminal device is provided, and the first terminal device is configured to execute the foregoing second aspect or any possible implementation method of the second aspect. Specifically, the first terminal device may include a module for executing the method in the second aspect or any possible implementation of the second aspect, for example, including: a determining module, which is used to determine the first parameter , The first parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is resource information used for relay transmission to a third terminal device; a transceiver module, the transceiver module is used for Send the first parameter to the second terminal device; the first terminal device and the second terminal device belong to the first communication group, and the terminal device in the first communication group is used to communicate to the third terminal device Candidate terminal equipment for relay transmission.

In a possible design, the transceiver module is further configured to receive first resource scheduling information from the second terminal device, and the first resource scheduling information is used by the first terminal device to determine the first resource, so The first resource is used by the first terminal device to relay and transmit data to the third terminal device.

The first terminal device of the fourth aspect may refer to the implementation manner set forth in the method of the first aspect above, and use the same or similar technical means to achieve the same or similar technical effects, and details are not repeated here.

In a fifth aspect, a communication device is provided, including: at least one processor coupled with at least one memory: the at least one processor is configured to execute a computer program or a computer program stored in the at least one memory Instructions to cause the device to execute the method described in the first aspect or any one of the possible designs of the first aspect or the second aspect or any of the second aspects.

In the sixth aspect, the embodiments of the present application also provide a computer-readable storage medium with a computer program stored on the computer storage medium. When the computer program is modified to run on the computer, the computer can execute the first aspect or the first aspect. Any one of the possible designs or the second aspect or the method described in any one of the second aspects.

In a seventh aspect, the embodiments of the present application also provide a computer program product. The computer program product includes a computer program. When the computer program runs on a computer, the computer executes any one of the first aspect or the first aspect. One possible design or the method described in the second aspect or any one of the second possible designs.

In an eighth aspect, an embodiment of the present application provides a chip that includes a processor and a communication interface. The processor is used to call and execute instructions from the communication interface. When the processor executes the instructions, the chip executes The method described in the first aspect or any possible design of the first aspect or the second aspect or any possible design of the second aspect.

In a ninth aspect, an embodiment of the present application provides a system that includes at least one of the second terminal device, the fourth aspect, or the fourth aspect as described in the third aspect or any one of the possible designs of the third aspect. Any possible design of the first terminal device or the chip of the eighth aspect.

In the embodiment of the present application, the second terminal device selects the terminal device for relay transmission by judging whether the terminal device in the communication group meets the service requirements, which can reduce the use of a new intermediate device due to poor link during relay transmission. Following the problems of high time delay and high resource overhead caused by terminal equipment, the relay transmission performance is improved.

Description of the drawings

Figure 1 provides a schematic diagram of a relay terminal device for data transmission;

FIG. 2 is a schematic diagram of the architecture of a possible V2X communication system provided by an embodiment of the present application;

FIG. 3 is a flowchart of a relay transmission method provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a structure of a source terminal device for multicast transmission according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a time window provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of a side row transmission resource provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a second terminal device provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a first terminal device provided by an embodiment of the present application

FIG. 9 is a schematic structural diagram of an apparatus 900 provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of an apparatus 1000 provided by an embodiment of the present application.

Detailed ways

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

Hereinafter, some terms in the embodiments of the present application will be explained to facilitate the understanding of those skilled in the art.

1) Terminal devices, including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity Sexual equipment. For example, it may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, D2D terminal equipment, V2X terminal equipment, machine-to-machine/machine-type communications (machine-to-machine/machine-type communications, M2M). /MTC) terminal equipment, internet of things (IoT) terminal equipment, subscriber unit, subscriber station, mobile station, remote station, access point ( access point (AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or user equipment (user device), etc. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, mobile devices with built-in computers, and so on. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants, PDA), and other equipment. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.

As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The various terminal devices described above, if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be regarded as vehicle-mounted terminal equipment, for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU). ).

In the embodiment of the present application, the terminal device may also include a relay terminal device (relay UE). Or it can be understood that everything that can communicate with the base station can be regarded as a terminal device.

In the embodiments of the present application, the device for realizing the function of the terminal device may be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided in the embodiments of the present application, the device used to implement the functions of the terminal is a terminal device as an example to describe the technical solutions provided in the embodiments of the present application.

2) Network equipment, including, for example, access network (AN) equipment, such as a base station (e.g., access point), which may refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network Or, for example, the network device in the V2X technology is a roadside unit (RSU). The base station can be used to convert the received air frame and IP packet to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network can include the IP network. The RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications. The network equipment can also coordinate the attribute management of the air interface. For example, the network equipment may include a long term evolution (LTE) system or an evolved base station (NodeB or eNB or e-NodeB, evolutional NodeB) in a long term evolution-advanced (LTE-A) system, Or it can also include the next generation node B (gNB) in the new radio (NR) system (also referred to as the NR system) in the 5th generation (5G) mobile communication technology (the 5th generation, 5G), or it can also Including a centralized unit (CU) and a distributed unit (DU) in a cloud radio access network (cloud radio access network, Cloud RAN) system, which is not limited in the embodiment of the present application.

3) Vehicle communication, for high-speed equipment represented by vehicles, is the basic technology and key technology applied in scenarios with very high communication delay requirements in the future, such as smart cars, autonomous driving, intelligent transportation systems and other scenarios. LTE V2X communication can support communication scenarios with and without network coverage, and its resource allocation method can adopt the network access equipment scheduling mode, such as E-UTRAN Node B (E-UTRAN Node B, referred to as eNB) The scheduling mode can also be a mode in which users independently select resources. Based on V2X technology, vehicle users (Vehicle UE, referred to as V-UE) can trigger some of their own information, such as position, speed, intent (turning, merging, and reversing) periodically and some non-periodical events. Information is sent to surrounding V-UEs, and similarly, V-UEs will also receive information from surrounding users in real time. Complete direct communication between vehicle users. It can be understood that vehicle communication belongs to terminal device-to-terminal device communication, and terminal device-to-terminal device communication refers to direct communication between terminal devices without data transfer through network devices. The technology of vehicle communication can be used for communication between the terminal and the terminal device. Conversely, the communication between the terminal and the terminal device can be used for the vehicle communication. In the case that this article does not specifically emphasize, vehicle communication and terminal equipment and terminal equipment communication can be replaced with each other.

4) The link between resource pool, vehicle communication, and vehicle equipment (vehicle equipment also belongs to user equipment) is called a side link, so vehicle communication can also be called side traffic. The time-frequency resource where the side-line communication is located is called a resource pool, that is, the frequency domain includes several sub-channels, and each sub-channel includes several physical resource blocks. The time domain includes at least one time unit of several time slots (slots), subframes (subframes), and mini-slots (mini-slots). The sending end UE and the receiving end UE perform side-line communication in the resource pool. Therefore, the configuration information of the sending resource pool of the sending end UE and the receiving resource pool of the receiving end UE are the same, and the configuration information includes, but is not limited to, physical resource configuration information Including the number of sub-channels, the size of sub-channels, time domain slot configuration information, transmission parameters (including demodulation reference signal configuration information, modulation and coding scheme configuration information), physical side control information configuration information (for example, physical side control Time domain length information of information, frequency domain length information of physical side row control information), physical side row feedback channel resource configuration information (such as the existence period of the physical side row feedback channel, physical side row shared channel-physical side row feedback channel Feedback duration), power control related information, and other basic configuration information for communication.

The network equipment may also include core network equipment. The core network equipment includes, for example, access and mobility management functions (AMF). Since the embodiments of the present application do not involve the core network, unless otherwise specified in the following text, the network devices mentioned all refer to the access network devices.

In the embodiments of the present application, the device used to implement the function of the network device may be a network device, or a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device. In the technical solutions provided in the embodiments of the present application, the device used to implement the functions of the network equipment is a network device as an example to describe the technical solutions provided in the embodiments of the present application.

5) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .

And, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects. , Priority or importance, etc. For example, the first network device and the second network device are only used to distinguish different network devices, but do not indicate the difference in priority or importance of the two pieces of information.

The embodiments of the present application can be applied to various communication systems, such as: LTE system, LTE-A system, NR system, or possible future communication system, and can also be a WiFi architecture, which is not specifically limited.

Figure 1 describes the data transmission process of the relay terminal equipment. The terminal device 11 is a source terminal device, the terminal device 12 is a relay terminal device, the terminal device 13 is a target terminal device, and the target terminal device may also be a network device. The following takes the target terminal device as the terminal device as an example for description. The link between the terminal device 12 and the terminal device 11 and the terminal device 13 is a side link. The data transmission between the source terminal device 11 and the target terminal device 13 is completed by the relay terminal device 12 forwarding. The specific process is that the source terminal device 11 determines that the relay terminal device 12 is a relay device, and the relay terminal device 12 is used for The data is forwarded to the target terminal device 13. That is, the relay terminal device 12 receives data from the source terminal device 11 and sends the data to the target terminal device 13. If the relay terminal device 12 cannot provide reliable relay transmission, for example, the link quality between the relay terminal device 12 and the target terminal device 13 continues to fail to meet the service quality of service (QoS) requirements, and/or medium After the link quality between the terminal device 12 and the source terminal device 11 continues to fail to meet the QoS requirements of the service, the source terminal device 11 may re-select a new relay terminal device for relay transmission. However, when the source terminal device 11 selects a new relay terminal device for relay transmission, it needs to re-determine the new relay terminal device and complete the establishment of the link with the new relay terminal device. This process will introduce additional delays. In addition to resource overhead, it cannot meet the low-latency requirements of V2X communication. In addition, the relay terminal equipment adopts a fixed number of retransmissions or retransmissions based on feedback, and some unnecessary repeated transmissions or feedback will increase a certain time delay. FIG. 1 takes a relay terminal device 12 as an example. In some scenarios, there may be multiple relay terminal devices that relay and forward data for the source terminal device 11 and the target terminal device 13 at the same time. When there are multiple relay terminal devices, the relay transmission of some relay terminal devices may be redundant, which will cause waste of resources and interference.

Fig. 2 is a schematic structural diagram of a possible V2X communication system provided by an embodiment of the present invention. As shown in FIG. 2, the V2X communication system includes a source terminal device 21, a target terminal device 25, and a first communication group. The target terminal device 25 may also be a network device. Optionally, the communication system may also only include the first communication group. The first communication group includes relay terminal devices 22-24. The relay terminal devices 22-24 have the ability to relay and transmit data, and are candidate terminals for receiving data sent by the source terminal device 21 and forwarding it to the target terminal device 25 equipment. The types of the relay terminal devices in the first communication group may be the same or different. For the specific types of terminal devices, please refer to the description of the terminal devices above. The first communication group includes a group head terminal device and a group member terminal device, and the group head terminal device has the capability of resource scheduling or allocation. Which or which candidate relay terminal devices in the first communication device group are used for relay transmission is determined by the group head. Here, the group head terminal device is the relay terminal device 24 as an example for description. The group head terminal device 24 selects a relay terminal device for relay transmission to the target terminal device 25 by determining whether the relay terminal device in the first communication group meets the current service requirements.

It should be understood that the communication system shown in FIG. 2 may also include a greater or lesser number of network nodes, for example, terminal devices or network devices, and the network devices or terminal devices included in the communication system shown in FIG. 2 may be The above-mentioned various forms of network equipment or terminal equipment. The embodiments of the present application are not shown one by one in the figure.

The following describes a relay transmission method provided by the present application with reference to the accompanying drawings. Please refer to FIG. 3, which is a flowchart of the method. In the following introduction process, the application of this method to the communication system shown in FIG. 2 is taken as an example.

Because this embodiment is applied to the network architecture shown in FIG. 2 as an example, the first terminal device described below may be any of the relay terminal devices 22-24 in the communication system shown in FIG. 2 One, the second terminal device described below may be the group head terminal device in the communication system shown in FIG. 2, that is, the terminal device 24.

31. The second terminal device obtains a first parameter from the first terminal device, where the first parameter is used to indicate the transmission resource information of the first terminal device, and the transmission resource information is used to transmit to the third terminal device. Resource information for subsequent transmission; the first terminal device and the second terminal device belong to the first communication group, and the terminal devices in the first communication group are candidate terminals for relay transmission to the third terminal device equipment

a. The second terminal device obtains the first parameter from the first terminal device

When the first terminal device is a member terminal device, the second terminal device acquiring the first parameter from the first terminal device may be that the second terminal device receives the first parameter from the first terminal device, and correspondingly, The first terminal device sends the first parameter to the second terminal device. Before the first terminal device sends the first parameter to the second terminal device, the first terminal device determines the first parameter.

Optionally, the second terminal device uses radio resource control (Radio Resource Control, RRC) signaling, media access control control element (MAC CE), and sidelink control information (Sidelink Control Information, SCI) Or, Sidelink Feedback Control Information (SFCI) receives the first parameter from the first terminal device.

When the first terminal device is a group head terminal device, that is, when the second terminal device and the first terminal device are the same terminal device, the second terminal device obtains the first parameter from itself.

b. The first parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is resource information used for relay transmission to a third terminal device;

The second terminal device obtains the first parameter from the first terminal device through at least one of radio resource control signaling, a medium access control control unit, side-line control information, or side-line feedback control information.

Optionally, the transmission resource information includes at least one of transmission window resource information and retransmission resource information. Specifically, the transmission resource information includes the retransmission resource information, or the transmission resource information includes transmission window resource information and retransmission resource information.

Optionally, the first parameter includes at least one of a second value and a third value, wherein the second value is used to indicate the transmission window resource information, and the third value is used to indicate the reconfiguration. Pass resource information. Specifically, the first parameter includes a third value, or the first parameter includes a second value and a third value.

The transmission window resource information may be a time window parameter W, and the retransmission resource information may be a retransmission parameter P and/or a transmission parameter K. The time window parameter W is used to indicate the resource size when the first terminal device performs sideline information transmission.

The resource for the first terminal device to transmit sideline information is in the time domain and may include one or more time units. The time unit may be a symbol, several symbols, a time slot, a subframe, etc. One or more time units can be continuous in physical time or discrete; in the frequency domain, it includes one or more frequency domain units, which can be a subchannel and an RB. Or several RBs. The one subchannel is composed of one or more resource blocks (RB). Taking the time unit as a time slot as an example, the resource for the first terminal device to transmit sideline information may be W time slots after time slot n, and the W time slots are used to transmit W transport blocks (TB). ), that is, 1 TB is transmitted on a slot. Or, the resource for the first terminal device to transmit side line information may be to transmit W code blocks (CB) in 1 time slot after time slot n. One TB can consist of one or more CBs. The following uses W time slots to transmit W TBs as an example to describe this solution. In practical applications, other transmission solutions may also be included, which are not limited here. Taking frequency domain units as sub-channels as an example, the positions (starting sub-channels and/or the number of sub-channels) of the sub-channels corresponding to each TB that are transmitted in W time slots may be the same or different. In the following, the present solution is described by assuming that each of the W time slots is used to transmit the TB and the corresponding sub-channel position is the same. In practical applications, other transmission schemes may also be included, which are not limited here.

Specifically, the time window parameter W may be a time window identified as m determined on the nth time unit, where m and n are integers greater than or equal to 1. The description of frequency domain resources will not be repeated here.

The time window parameter W is also used to indicate that the time window W contains W time units for transmitting W TB sideline information. The details are shown in Figure 5. The time window parameter W can indicate that the time window contains 5 time units, and each time unit can transmit one TB, that is to say, the time window parameter W can be 5

For example, as shown in FIG. 6, the resources for the first terminal device to transmit sideline information include a first time window with a time window parameter of W1 and a second time window with a time window parameter of W2. In the second time window, the relationship between K and P is K+P=W. The first time window is the previous time window of the second time window, where the transmission parameter K indicates that the second time window is compared with the previous time window, and the side row information of K TBs in the second time window is initially transmitted. The retransmission parameter P indicates that the side row information of P TBs in the second time window and the previous time window are the same, that is, the first data in the second time window is the same as the first data in the first time window, It can also be understood that the P TBs in the second time window are retransmitted. The retransmitted TB can use different redundancy versions (RV, Redundancy Version), and the receiving end can merge the side line information of P TBs received in the two time windows to improve the decoding success rate, thereby improving the side Reliability of data transmission. Since the determination of W and P/K is based on the actual state of the channel, the determined W and K/P may be different at different times, thus reducing the unnecessary retransmission caused by the fixed number of blind retransmissions (blind retransmission) The problem of low resource utilization and system interference. At the same time, data retransmission does not rely on physical response information, which avoids the consumption of time-frequency resources required to carry response information and reduces the delay of service transmission. The retransmission resource information may be indicated by the retransmission parameter P and/or the transmission parameter K, where the retransmission resource information is implicitly indicated by the transmission parameter K. Optionally, the parameter in the retransmission resource information may be a parameter P or a parameter K, and P and K may be calculated from M-K and M-P, respectively.

The following takes the transmission parameter K as an example for description. The transmission parameter K is the number of TBs initially transmitted in the side row information of W TBs transmitted in the time window. When the time window parameter W is a fixed value, the better the channel conditions, the number of retransmission TBs required The smaller the number, the corresponding number of newly transmitted TBs can be increased, that is, the transmission parameter K can take a larger value; when the channel conditions are poor, the number of TBs that need to be retransmitted is larger, and the number of TBs corresponding to the initial transmission Decrease, that is, the transmission parameter K needs to take a smaller value. Therefore, the transmission parameter can also be called the Freshness Factor. W and K are integers, W≥1, 0≤K≤M. The smaller the value of K, the larger the value of P, and the more data to be retransmitted, so the reliability of the service is higher. However, when the amount of transmitted data is constant, the amount of resources occupied is larger, and the resource utilization rate is Lower. Conversely, the larger the value of K, the smaller the value of P, and the less data to be retransmitted. Therefore, the service reliability is relatively low, but when the amount of transmitted data is constant, the amount of resources occupied is also smaller. , Resource utilization is high.

c. The first terminal device and the second terminal device belong to a first communication group, and the terminal devices in the first communication group are candidate terminal devices for relay transmission to a third terminal device

The terminal devices in the first communication group are candidate terminal devices for relay transmission to the third terminal device. It can be understood that all the terminal devices in the first communication group have the ability to relay data to the third terminal device. However, which terminal device or terminal devices in the first communication group is used for relay transmission to the third terminal device is determined by the group head terminal device, that is, the second terminal device. The third terminal device is a target terminal device, which may correspond to the terminal device 25 of the communication system shown in FIG. 2, and the third terminal device may also be a network device.

The first communication group includes at least one terminal device, and the at least one terminal device is allocated by a higher layer as a member of the first communication group. The high-layer allocation may refer to allocation by a layer above the physical layer, such as Media Access Control (Media Access Control). Control, MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol, PDCP layer, Radio Resource Control (RRC) layer, or Access Stratum , AS) layer, V2X layer, application layer, etc., can also be allocated by other non-cellular network corresponding layers, which is not limited here. Group members in the first communication group can know the identities of other group members in the group.

Optionally, the second terminal device, as the group head terminal device, establishes a related relay transmission connection with the source terminal device, and the related relay transmission connection can enable the source terminal device to know the first communication group or the first communication group The related information of the group members, including the group member ID and the number of group members. The second terminal device can also exchange information about relay transmission with the source terminal device through higher layers, such as informing the number of candidate relay devices (that is, the number of group members). It is understandable that the greater the number of candidate relay devices, The higher the reliability of the data relay, the more it can meet the QoS requirements of the source terminal equipment for the high-reliability relay service. The meaning of the high-level here can refer to the above-mentioned high-level description.

Optionally, as shown in FIG. 4, the source terminal device sends data to the first communication group through multicast, and the first communication group receives the data, and at least one terminal device in the first communication group transfers the data to the first communication group. Forward to the target terminal. This data can also be referred to as relay transmission data.

32. The second terminal device determines whether the first terminal device is used for relay transmission to a third terminal device according to the first parameter and the first value.

The second terminal device compares the third value in the first parameter with the first value to determine whether the first terminal device meets the current service requirements. The first value may be a threshold value predefined in the standard or factory set, or the second terminal device may obtain the first value from a network device; or the second terminal device may independently determine the first value; or the second terminal device may independently determine the first value; or The second terminal device obtains the first value from the third terminal device. When the second terminal device obtains the first value from the third terminal device, the first value may be determined by the third terminal device. For example, the third terminal device may determine the value based on the quality of the link or the demand for receiving data. definite.

Service requirements may refer to the reliability of the relay transmission service or the size of the resources occupied by the relay transmission or the resource utilization rate, etc. The service requirements may be different in different scenarios or at different times. The second terminal device may determine the second terminal device according to the service requirements. Whether a terminal device is used for relay transmission to a third terminal device.

Optionally, the second terminal device determines that the first terminal device whose third value is less than or equal to the first value may be used for relay transmission to the third terminal device. When the third value is greater than the first value, the second terminal device determines that the first terminal device is not used for relay transmission.

In the following, the first parameter including the third value as K or P and the third value as K and P are taken as examples to illustrate how to determine whether the first terminal device is used for relay transmission to the third terminal device.

When the third value is P, the current service requirement requires high reliability of the transmission service, that is, the service QoS needs to meet certain requirements, and the second terminal device can determine that the value of P in the candidate terminal device is less than or equal to the first value The first terminal device is used for relay transmission to the third terminal device. The first terminal device whose P value is greater than the first value among the candidate terminal devices is used for relay transmission to the third terminal device.

When the third value is K, the current service requirement requires high reliability of the transmission service, that is, the service QoS needs to meet certain requirements, and the second terminal device can determine the first candidate terminal device whose K value is greater than the first value. A terminal device is used for relay transmission to a third terminal device. The first terminal device of the candidate terminal device whose K value is less than or equal to the first value is used for relay transmission to the third terminal device.

When the third value is P, and the current service requirement requires that the relay transmission takes up less resources or the resource utilization is high, the second terminal device can determine the first terminal of the candidate terminal device whose P value is greater than the first value. The device is used for relay transmission to the third terminal device. The first terminal device whose P value is less than or equal to the first value among the candidate terminal devices is used for relay transmission to the third terminal device.

When the third value is K, and the current service requirement requires that the relay transmission takes up less resources or the resource utilization rate is high, the second terminal device may determine the first candidate terminal device whose K value is less than or equal to the first value. A terminal device is used for relay transmission to a third terminal device. The first terminal device whose K value is greater than the first value among the candidate terminal devices is used for relay transmission to the third terminal device.

When the third value includes K and P, the second terminal device can judge one of them according to the above-mentioned judgment process of K and P, or judge both parameters at the same time.

The relationship between the third value and the first value on which the second terminal device determines whether the first terminal device is used for relay transmission to the third terminal device may also be in other forms, for example, when the third value is less than When the first value is the first value, the second terminal device determines that the first terminal device is used for relay transmission to the third terminal device. When the third value is greater than or equal to the first value, the second terminal device determines that the The first terminal device is not used for relay transmission to the third terminal device. This is just an example, and the relationship between the third value and the first value is not limited here. In the actual application process, there may also be a fourth value used to determine whether the first terminal device is used for relay transmission to the third terminal device.

Optionally, the second terminal device acquires the first parameter value of all or part of the member terminal devices in the first communication group, and when the third value of the X terminal devices in the first communication group is less than or equal to the first parameter value When it is a numerical value, the group head terminal device can instruct Y of the X terminal devices to be used for relay transmission to the third terminal device, where X and Y are both integers greater than or equal to 1.

The second terminal device uses a group member terminal device with a smaller K value or a larger P value to perform relay transmission to the third terminal device, which can reduce resource waste and interference. Therefore, the problems of high time delay and high resource overhead caused by the terminal equipment during relay transmission are reduced, and the relay transmission performance is improved.

The second terminal device uses a group member terminal device with a larger K value or a smaller P value for relay transmission to the third terminal device, which can improve the stability of the transmission service.

Optionally, when the first terminal device is a member terminal device, the second terminal device determines that the first terminal device is used for relay transmission to a third terminal device, and the second terminal device The first terminal device sends the first resource scheduling information, and correspondingly, the first terminal device receives the first resource scheduling information from the second terminal device. The first resource scheduling information is used by the first terminal device to determine a first resource, and the first resource is used by the first terminal device to relay and transmit data to the third terminal device.

When the first terminal device is the group head terminal device, that is, when the second terminal device and the first terminal device are the same terminal device, the second terminal device determines the first resource, and the second terminal device is in the first Relaying and transmitting data to the third terminal device on a resource.

Optionally, when the second terminal device has network coverage or no network coverage, the second terminal device receives second resource scheduling information from the network device, where the second resource scheduling information is used to determine the first resource; and / or

The second terminal device independently selects and determines the first resource.

The autonomous choice here can refer to the choice of autonomous resources.

Through the embodiments of this application, the group head terminal device uses the relay transmission characteristics of the terminal devices in the first communication group to coordinate or schedule candidate terminal devices as relay terminal devices, and can dynamically configure or schedule different candidate terminal devices according to business requirements. Relay transmission. Improve the resource utilization of relay transmission, reduce time delay and improve reliability.

It can be understood that each device, such as the first terminal device or the second terminal device, in order to realize the above-mentioned functions, includes a hardware structure and/or software module corresponding to each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the embodiments of the present application.

The embodiment of the present application may divide the first device into functional modules. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one functional module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

For example, in the case of dividing the functional modules of the first device in an integrated manner, FIG. 7 shows a possible schematic structural diagram of the second terminal device involved in the above-mentioned embodiment of the present application. The second terminal device may be the apparatus 700. The apparatus 700 may include an obtaining module 701 and a determining module 702. Wherein, the obtaining module 701 may be used to perform the obtaining operation performed by the second terminal device in the embodiment shown in FIG. 3, such as 31, and/or other processes used to support the technology described herein. The determining module 702 may be used to perform the determining operation performed by the second terminal device in the embodiment shown in FIG. 3, such as 32, and/or other processes used to support the technology described herein. The apparatus 700 may further include a transceiver module, and the transceiver module may be used to support other processes of the technology described herein.

The obtaining module 701 is configured to obtain a first parameter, where the first parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is resource information used for relay transmission to a third terminal device ；

The first terminal device and the second terminal device belong to a first communication group, and the terminal devices in the first communication group are candidate terminal devices for relay transmission to a third terminal device;

The determining module 702 is configured to determine whether the first terminal device is used for relay transmission to a third terminal device according to the first parameter and the first value.

As an optional implementation manner, the transmission resource information includes at least one of transmission window resource information and retransmission resource information.

As an optional implementation manner, the first parameter includes at least one of a second value and a third value, wherein the second value is used for indicating the transmission window resource information, and the third value is used for To indicate the retransmission resource information.

As an optional implementation manner, when the third value is less than or equal to the first value, the determining module 702 is further configured to determine that the first terminal device is used for relay transmission to the third terminal device.

As an optional implementation manner, when the third value is greater than the first value, the determining module 702 is further configured to determine that the first terminal device is not used for relay transmission.

As an optional implementation manner, the apparatus 700 further includes a transceiving module, and the transceiving module is configured to send first resource scheduling information to the first terminal device, and the first resource scheduling information is used for the first terminal device. A terminal device determines a first resource, and the first resource is used by the first terminal device to relay and transmit data to the third terminal device.

As an optional implementation manner, when the first terminal device and the second terminal device are the same terminal device, the determining module 702 is further configured to determine the first resource, and the apparatus 700 further includes a transceiver module , The transceiving module is configured to relay and transmit data to the third terminal device on the first resource.

As an optional implementation manner, the apparatus 700 further includes a transceiver module, the transceiver module is configured to receive second resource scheduling information from a network device, and the second resource scheduling information is used to determine the first resource; and/ or

The determining module 702 is also used to determine the first resource.

As an optional implementation manner, the acquiring module 701 is further configured to obtain data from the first terminal through at least one of radio resource control signaling, media access control unit, side-line control information, or side-line feedback control information. The device obtains the first parameter.

As an optional implementation manner, the first value is predefined; or

The obtaining module 701 is further configured to obtain the first value from a network device; or

The determining module 702 is further configured to determine the first value autonomously; or

The obtaining module 701 is further configured to obtain the first value from the third terminal device.

FIG. 8 shows a schematic diagram of a possible structure of the first terminal device involved in the foregoing embodiment of the present application. The first terminal device may be the apparatus 800. The device 800 may include a determining module 801 and a transceiver module 802. Wherein, the determining module 801 may be used to perform the determining operation performed by the first terminal device in the embodiment shown in FIG. 3, and/or used to support other processes of the technology described herein. The transceiver module 802 may be used to perform the determination operation performed by the first terminal device in the embodiment shown in FIG. 3, such as 31, and/or other processes used to support the technology described herein.

The determining module 801 is configured to determine a first parameter, where the first parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is resource information used for relay transmission to a third terminal device ；

The transceiver module 802 is configured to send the first parameter to a second terminal device; the first terminal device and the second terminal device belong to a first communication group, and the terminal devices in the first communication group are for Candidate terminal device for relay transmission to the third terminal device.

As an optional implementation manner, the transceiver module 802 is further configured to receive first resource scheduling information from the second terminal device, where the first resource scheduling information is used by the first terminal device to determine the first resource, so The first resource is used by the first terminal device to relay and transmit data to the third terminal device.

Refer to FIG. 9, which is a schematic structural diagram of a first terminal device or a second terminal device provided by the present application. The device 900 can be applied to the system shown in FIG. 2. For ease of description, FIG. 9 only shows the main components. As shown in FIG. 9, the device 900 includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is used to control the antenna and the input and output devices to send and receive signals, the memory is used to store computer programs, and the processor is used to call and run the computer programs from the memory. The radio frequency circuit is mainly used to convert baseband signals and radio frequency signals and process radio frequency signals. . The antenna 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, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

When data needs to be sent, 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 then sends the radio frequency signal out in the form of electromagnetic waves through the antenna. 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, and the processor converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for ease of description, FIG. 9 only shows a memory and a processor. In the actual first 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 the embodiment of the present application.

FIG. 10 is a schematic structural diagram of an apparatus 1000 provided by an embodiment of this application. The apparatus 1000 shown in FIG. 10 may be a first terminal device or a second terminal device, or may be a chip or circuit capable of completing the functions of the first terminal device or the second terminal device. For example, the chip or circuit may be set in the first terminal device or the second terminal device. The terminal device or the second terminal device. The apparatus 1000 shown in FIG. 10 may include at least one processor 1001 (for example, the acquiring module 701, the determining module 702, or the determining module 801 may be implemented by the processor 1001) and an interface circuit 1002. The processor 1001 implements the steps involved in the method provided in the embodiment shown in FIG. 3. Optionally, the device 1000 may further include a memory 1003, and the memory 1003 may be used to store instructions. The processor 1001 executes the instructions stored in the memory 1003 to enable the device 1000 to implement the steps in the method provided in the embodiment shown in FIG. 3.

Further, the processor 1001, the interface circuit 1002, and the memory 1003 can communicate with each other through an internal connection path to transfer control and/or data signals. The memory 1003 is used to store computer programs. The processor 1001 can call and run the computer programs from the memory 1003 to control the interface circuit 1002 to receive or send signals, or the processor 1001 can call and run from the memory 1003 through the interface circuit 1002 A computer program to complete the steps executed by the first terminal device or the second terminal device in the method provided in the embodiment shown in FIG. 3. The memory 1003 may be integrated in the processor 1001, or may be provided separately from the processor 1001.

Optionally, if the apparatus 1000 is a device, the interface circuit 1002 may include a receiver and a transmitter. Wherein, the receiver and the transmitter may be the same component or different components. When the receiver and transmitter are the same component, the component can be called a transceiver.

Optionally, if the device 1000 is a chip or a circuit, the interface circuit 1002 may include an input interface and an output interface, and the input interface and the output interface may be the same interface, or may be different interfaces respectively.

Optionally, if the device 1000 is a chip or a circuit, the device 10 may not include the memory 1003, and the processor 1001 may read instructions (programs or codes) in the memory external to the chip or circuit to implement the implementation shown in FIG. 3. The steps performed by the first terminal device or the second terminal device in the method provided in the example.

Optionally, if the device 1000 is a chip or a circuit, the device 1000 may include a resistor, a capacitor, or other corresponding functional components, and the processor 1001 or the interface circuit 1002 may be implemented by corresponding functional components.

As an implementation manner, the function of the interface circuit 1002 may be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 1001 may be implemented by a dedicated processing chip, a processing circuit, a processor, or a general-purpose chip.

As another implementation manner, a general-purpose computer may be considered to implement the first terminal device or the second terminal device provided in the embodiment of the present application. That is, the program codes for realizing the functions of the processor 1001 and the interface circuit 1002 are stored in the memory 1003, and the processor 1001 implements the functions of the processor 1001 and the interface circuit 1002 by executing the program codes stored in the memory 1003.

Among them, the functions and actions of the modules or units in the apparatus 1000 listed above are only exemplary descriptions, and the functional units in the apparatus 1000 can be used to execute the execution performed by the first terminal device or the second terminal device in the embodiment shown in FIG. 3 Each action or process. In order to avoid repetitive descriptions, detailed descriptions are omitted here.

The embodiment of the present application also provides a communication system. It includes the first terminal device and the second terminal device mentioned in the foregoing embodiment of the present application.

The embodiments of the present application also provide a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer can implement the method shown in FIG. 3 provided by the foregoing method embodiment. The process related to the first terminal device in the embodiment.

The embodiments of the present application also provide a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer can implement the method shown in FIG. 3 provided by the foregoing method embodiment. The process related to the second terminal device in the embodiment.

The embodiment of the present application also provides a computer program product, the computer program product is used to store a computer program, when the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 3 provided by the above method embodiment The process related to the first terminal device.

The embodiment of the present application also provides a computer program product, the computer program product is used to store a computer program, when the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 3 provided by the above method embodiment The process related to the second terminal device.

It should be understood that the processor mentioned in the embodiments of this application may be a CPU, other general-purpose processors, digital signal processors (digital signal processors, DSP), application specific integrated circuits (ASICs), ready-made Field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), and synchronous dynamic random 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 (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated in the processor.

It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application. The implementation process constitutes any limitation.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

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

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

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

The above are only specific implementations of the application, but the scope of protection of the embodiments of the application is not limited thereto. Any person skilled in the art can easily think of changes within the technical scope disclosed in the embodiments of the application. Or replacement should be covered within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

A method for relay transmission, characterized in that it comprises:

The second terminal device obtains a first parameter from the first terminal device, where the first parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is used for relay transmission to a third terminal device Resource information;

The first terminal device and the second terminal device belong to a first communication group, and the terminal devices in the first communication group are candidate terminal devices for relay transmission to a third terminal device;

The second terminal device determines whether the first terminal device is used for relay transmission to the third terminal device according to the first parameter and the first value.
The method according to claim 1, wherein the transmission resource information includes at least one of transmission window resource information and retransmission resource information.
The method according to claim 1 or 2, wherein the first parameter includes at least one of a second value and a third value, wherein the second value is used to indicate the transmission window resource information, The third value is used to indicate the retransmission resource information.
The method of claim 3, wherein:

The second terminal device determining whether the first terminal device is used for relay transmission to a third terminal device according to the first parameter and the first value includes:

When the third value is less than or equal to the first value, the second terminal device determines that the first terminal device is used for relay transmission to the third terminal device.
The method according to claim 3, wherein the second terminal device determines whether the first terminal device is used for relay transmission to a third terminal device according to the first parameter and the first value, comprising :

When the third value is greater than the first value, the second terminal device determines that the first terminal device is not used for relay transmission.
The method according to claim 4, wherein the method further comprises:

The second terminal device sends first resource scheduling information to the first terminal device, where the first resource scheduling information is used by the first terminal device to determine a first resource, and the first resource is used for the first resource. A terminal device relays and transmits data to the third terminal device.
The method according to claim 4, wherein the method further comprises:

When the first terminal device and the second terminal device are the same terminal device, the second terminal device determines the first resource, and the second terminal device transfers the first resource to the third terminal device. Then transfer the data.
The method according to claims 1-7, wherein the method further comprises:

The second terminal device receives second resource scheduling information from the network device, where the second resource scheduling information is used to determine the first resource; and/or

The second terminal device independently selects and determines the first resource.
The method according to any one of claims 1-8, comprising:

The second terminal device obtains the first parameter from the first terminal device through at least one of radio resource control signaling, a medium access control control unit, side-line control information, or side-line feedback control information.
The method according to any one of claims 1-9, comprising:

The first value is predefined; or

The second terminal device obtains the first value from a network device; or

The second terminal device autonomously determines the first value; or

The second terminal device obtains the first value from the third terminal device.
A method for relay transmission, characterized in that it comprises:

The first terminal device determines a first parameter, where the first parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is resource information used for relay transmission to a third terminal device;

Sending the first parameter to the second terminal device by the first terminal device;

The first terminal device and the second terminal device belong to a first communication group, and the terminal devices in the first communication group are candidate terminal devices used for relay transmission to a third terminal device.
The method according to claim 11, wherein the transmission resource information includes at least one of transmission window resource information and retransmission resource information.
The method according to claim 11 or 12, wherein the first parameter includes at least one of a second value and a third value, wherein the second value is used to indicate the transmission window resource information, The third value is used to indicate the retransmission resource information.
The method according to any one of claims 11-13, wherein the method further comprises:

The first terminal device receives first resource scheduling information from the second terminal device, where the first resource scheduling information is used by the first terminal device to determine a first resource, and the first resource is used for the first resource. A terminal device relays and transmits data to the third terminal device.
A second terminal device, characterized by comprising:

An acquisition module, the acquisition module is configured to acquire a first parameter, the first parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is used to perform relay transmission to a third terminal device Resource information;

The first terminal device and the second terminal device belong to a first communication group, and the terminal devices in the first communication group are candidate terminal devices for relay transmission to a third terminal device;

The determining module is configured to determine whether the first terminal device is used for relay transmission to a third terminal device according to the first parameter and the first value.
The second terminal device according to claim 15, wherein:

The transmission resource information includes at least one of transmission window resource information and retransmission resource information.
The second terminal device according to claim 15 or 16, wherein the first parameter includes at least one of a second value and a third value, wherein the second value is used to indicate the transmission window Resource information, where the third value is used to indicate the retransmission resource information.
The second terminal device according to claim 17, wherein:

The determining module determining whether the first terminal device is used for relay transmission to a third terminal device according to the first parameter and the first value includes:

When the third value is less than or equal to the first value, the determining module determines that the first terminal device is used for relay transmission to the third terminal device.
The second terminal device according to claim 17, wherein:

The determining module determining whether the first terminal device is used for relay transmission to a third terminal device according to the first parameter and the first value includes:

When the third value is greater than the first value, the determining module determines that the first terminal device is not used for relay transmission.
The second terminal device according to claim 18, wherein:

The second terminal device further includes a transceiver module configured to send first resource scheduling information to the first terminal device, where the first resource scheduling information is used by the first terminal device to determine the first resource , The first resource is used for the first terminal device to relay and transmit data to the third terminal device.
The second terminal device according to claim 18, wherein:

When the first terminal device and the second terminal device are the same terminal device, the determining module is also used to determine the first resource, the second terminal device further includes a transceiver module, and the transceiver module is used to The data is relayed and transmitted to the third terminal device on the first resource.
The second terminal device according to claims 15-21, wherein:

The second terminal device further includes a transceiving module, the transceiving module is configured to receive second resource scheduling information from the network device, the second resource scheduling information is used to determine the first resource; and/or

The determining module is also used to determine the first resource.
The second terminal device according to claims 15-22, wherein:

The acquisition module is further configured to acquire the first parameter from the first terminal device through at least one of radio resource control signaling, a media access control control unit, side-line control information, or side-line feedback control information.
The second terminal device according to claim 15-23, characterized by comprising:

The first value is predefined; or

The obtaining module is further configured to obtain the first value from a network device; or

The determining module is also used to determine the first value autonomously; or

The obtaining module is further configured to obtain the first value from the third terminal device.
A first terminal device, characterized in that it comprises:

A determining module, the determining module is configured to determine a first parameter, the first parameter is used to indicate transmission resource information of the first terminal device, and the transmission resource information is used to perform relay transmission to a third terminal device Resource information;

A transceiver module, where the transceiver module is used to send the first parameter to a second terminal device;

The first terminal device and the second terminal device belong to a first communication group, and the terminal devices in the first communication group are candidate terminal devices used for relay transmission to a third terminal device.
The first terminal device according to claim 25, wherein the transmission resource information includes at least one of transmission window resource information and retransmission resource information.
The first terminal device according to claim 25 or 26, wherein the first parameter includes at least one of a second value and a third value, wherein the second value is used to indicate the transmission window Resource information, where the third value is used to indicate the retransmission resource information.
The method according to any one of claims 25-27, wherein:

The transceiver module is further configured to receive first resource scheduling information from the second terminal device, where the first resource scheduling information is used by the first terminal device to determine a first resource, and the first resource is used for the The first terminal device relays and transmits data to the third terminal device.
A computer storage medium, characterized in that a computer program is stored on the computer storage medium, and when the computer program runs on a computer, the computer is caused to execute the method according to any one of claims 1-10 .
A computer storage medium, characterized in that a computer program is stored on the computer storage medium, and when the computer program runs on a computer, the computer is caused to execute the method according to any one of claims 11-14 .
A computer program product, characterized in that the computer program product comprises a computer program, when the computer program is run on a computer, the computer is caused to execute any one of claims 1-10 or 11-14 Methods.
A chip, characterized in that the chip includes:

A processor and a communication interface, the processor is used to call and run instructions from the communication interface, and when the processor executes the instructions, the method according to any one of claims 1-10 or 11-14 is implemented .
A communication device, characterized in that the device includes at least one processor, and the at least one processor is coupled with at least one memory:

The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the device executes the method according to any one of claims 1-10 or 11-14.