CN114846899A

CN114846899A - Multi-hop path data transmission method and related device

Info

Publication number: CN114846899A
Application number: CN201980103190.0A
Authority: CN
Inventors: 张莉莉; 张鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2022-08-02
Also published as: WO2021134696A1

Abstract

The embodiment of the invention discloses a multi-hop path data transmission method and a related device, wherein the multi-hop path comprises a first device, a second device and a third device, the first device is a source device, the second device is a target device, and the method comprises the following steps: the third equipment receives first control information from the first equipment, wherein the first control information comprises a source identifier and a destination identifier; and the third equipment transfers the data scheduled by the first control information according to the path indication information, wherein the path indication information is used for indicating the target transmission path. By adopting the embodiment of the invention, the equipment in the multi-hop path can autonomously confirm data forwarding, and the flexibility and efficiency of data transmission in the multi-hop path are improved.

Description

Multi-hop path data transmission method and related device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a multi-hop path data transmission method and a related apparatus.

Background

An inter-device communication D2D technology is introduced into release 12 Rel-12 of 3GPP LTE and standardized, so that User Equipment (UE) can directly communicate with each other to meet the requirements of emerging services such as Public Safety. (note that D2D at this time can only support UE discovery within the network coverage, and communication between UE and UE, which may be unicast or broadcast, and support scenarios where all UEs are within the network coverage, part of UEs are within the network coverage, and all UEs are outside the network coverage). The Rel-13 of LTE introduces a UE-to-Network relay technology from equipment to Network and is standardized. The technology enables the network to extend the coverage of the network through a Layer 3 Relay by using the D2D technology introduced by Rel-12, and the UE outside the network coverage can obtain service by the UE in the network coverage. Furthermore, in Rel-14/15/16, Vehicle-to-outside information (V2X) has established itself as a major application of D2D technology. V2X includes Vehicle-to-Vehicle (V2V), Vehicle-to-pedestrian (V2P), Vehicle-to-Infrastructure (V2I), and Vehicle-to-roadside (V2R) applications. V2V refers to LTE-based inter-vehicle communication; V2P refers to LTE-based vehicle-to-person communication (including pedestrians, cyclists, drivers, or passengers); V2R refers to LTE based vehicle to roadside devices (RSUs), and in addition V2N may be included in V2I, V2N refers to LTE based vehicle to base station/network communications. Roadside devices (RSUs) include two types: the RSU of the terminal type is in a non-mobile state because the RSU is distributed on the roadside, and the mobility does not need to be considered; the RSU, being of the base station type, can provide timing synchronization and resource scheduling to the vehicle with which it communicates. The UE cooperation can be performed no matter in the existing D2D, V2V, V2X, the fifth generation mobile communication technology 5G V2X, and the future sidelink application scenario.

From the perspective of communication theory development and application scenario requirements, a new air interface NR version 17 Rel-17 is a good opportunity for commercialization of user cooperation technology. From the history of 3GPP standard development, technologies such as communication between UEs and UE-to-Network relay included in user cooperation have been studied in 3 GPP. The UE-to-Network Relay is a technology that one UE assists another UE to communicate with a base station, and is also called a Relay technology. Both the previously studied D2D technology and Relay technology can be considered as an integral part of user collaboration technology.

At present, data relay in a user cooperation technology discussed by a related standard is limited to be from a base station to a UE at an inner coverage edge and then to a UE at an outer coverage edge, that is, when data is sent from the base station, if a second device is out of a signal coverage range of the base station, a target UE cannot directly receive transmission from the base station, and the base station can uniformly schedule data relay through an in coverage edge UE, so how to more flexibly implement data relay in a multi-hop path is a problem to be solved.

Disclosure of Invention

Embodiments of the present invention provide a multi-hop path data transmission method and a related apparatus, which enable a device in a multi-hop path to autonomously confirm data forwarding, and improve flexibility and efficiency of data transmission in the multi-hop path.

In a first aspect, an embodiment of the present invention provides a multi-hop path data transmission method, where a multi-hop path includes a first device, a second device, and a third device, the first device is a source device, and the second device is a target device, where the method includes:

the third equipment receives first control information from the first equipment, wherein the first control information comprises a source identification and a destination identification;

and the third equipment transfers the data scheduled by the first control information according to path indication information, wherein the path indication information is used for indicating a target transmission path.

By implementing the embodiment of the invention, when the third equipment transfers data, the third equipment does not need to transfer according to the scheduling of the network equipment, and the home terminal can autonomously determine to transfer the data according to the path indication information, thereby being beneficial to improving the flexibility and the efficiency of data transmission in a multi-hop path.

In one possible example, the first control information is first sidelink control information SCI.

In one possible example, the first SCI is a primary SCI, or a first SCI or a second SCI of the secondary SCIs. When the first control information is SCI, the first device, the one or more relay devices, and the second device may be terminal devices, and a user cooperation group may be formed so that the devices support proximity services.

In one possible example, the path indication information includes information indicating the target transmission path or information indicating a target relay device; wherein the information for indicating the target transmission path includes at least one of: an identifier of a transmission path including the first device, the target relay device, and the second device; the identification of the transmission path comprising the target transfer device and the second device; including an identification of a transmission path of the second device; and an identification of a transmission path comprising the first device and the second device; the information for indicating the target relay apparatus includes at least one of: the equipment identification of the target transfer equipment; a device identification of the first device; a device identification of the second device; wherein the target relay apparatus includes the third apparatus. As can be seen, the path indication information may directly include the indication information of the target transmission path, and may completely indicate the entire transmission path; alternatively, the path indication information may include indication information of the target relay device, thereby accurately indicating the condition of the next hop device of the target relay device.

In one possible example, the relaying, by the third device, the data scheduled by the first control information according to the path indication information includes: the third equipment determines whether to transfer the side link data scheduled by the first control information according to the acquired path indication information; and when the third device determines to relay the sidelink data scheduled by the first control information, the third device sends second control information, wherein the second control information comprises the source identifier and the destination identifier. As can be seen, since the second control information includes the source identifier and the destination identifier, when the next hop device of the third device receives the second control information, if the next hop device is the second relay device, the second relay device may determine to forward data according to the path indication information obtained by the local terminal, and if the next hop device is the second device, the second device determines to receive data, so as to ensure continuity and accuracy of data relay transmission.

In one possible example, the second control information is a second SCI.

In one possible example, the second SCI is the primary SCI, or the primary SCI or the secondary SCI of the secondary SCIs.

In one possible example, the path indication information includes link quality information of the target transmission path.

In one possible example, the first control information further includes priority indication information; the third device sends second control information, including: and when the third equipment detects that the priority indication information is greater than or equal to a first preset threshold, the second control information is sent.

In one possible example, the first control information further includes priority indication information; the third device sends second control information, including: and when the third equipment detects that the priority indication information is greater than or equal to a first preset threshold, the third equipment sends the second control information according to the link quality information. Therefore, the data transmission of the transfer equipment is restrained through the priority indication information, the data transmission pressure of the transfer equipment is prevented from being increased due to the fact that all legal data are transmitted by the transfer equipment without difference, and the utilization rate of transmission resources is balanced.

In one possible example, the path indication information includes a transmission decision factor of the third device; the third device sends second control information, including: the third device generates a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second control information.

In one possible example, the path indication information includes a transmission decision factor of the third device; the third device sends second control information, including: the third device generates a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second control information according to the link quality information. Therefore, the decision random number and the sending decision factor are used for restricting the data sending of the transfer equipment, so that the data transmission pressure of the transfer equipment can be prevented from being increased due to the fact that all legal data are sent by the transfer equipment indiscriminately, and the utilization rate of transmission resources is balanced.

In one possible example, the first control information further includes priority indication information; the path indication information includes a transmission decision factor of the third device; the third device sends second control information, including: when the third device detects that the priority indication information is smaller than the first preset threshold, generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second SCI according to the link quality information. Therefore, the data transmission of the transfer equipment is restrained at the first level through the priority indication information, the data transmission of the transfer equipment is further restrained at the second level through the transmission judgment factor, the data transmission pressure is prevented from being increased due to the fact that the transfer equipment needs to transmit all legal data, and the utilization rate of transmission resources is balanced.

In one possible example, the obtaining of the path indication information includes any one of the following implementations: obtaining through pre-configuration; and obtaining from the network device through signaling, wherein the signaling is at least one of Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or physical layer signaling.

In a second aspect, an embodiment of the present invention provides a multi-hop path data transmission method, including:

and the third equipment reports the measurement result of the side link to the network equipment, wherein the measurement result is obtained by measurement based on the reference signal of the side link control channel PSCCH or the side link data channel PSSCH.

In one possible example, the measurement result is obtained by the third device measuring a reference signal from at least one of the first device, the second device, or one or more relay devices.

In one possible example, the multi-hop path includes a first device, a second device, and a third device, where the first device is a source device, the second device is a target device, and the third device belongs to a relay device.

In one possible example, the measurement result includes any one of: SL-RSRP, SL-RSRQ, or SL-RSSI.

In one possible example, the method further comprises: and the third equipment reports the position information to the network equipment.

In one possible example, the reporting trigger condition and the reporting content of the measurement result include at least one of:

when the measuring result is larger than or equal to a predefined threshold value, reporting the measuring result; or reporting the measurement result and indication information of the measured equipment corresponding to the measurement result; or reporting the identified path and the indication information of the measured equipment corresponding to the path;

the indication information of the measured equipment corresponding to the measurement result comprises an equipment identifier of the measured equipment or an identifier of the measured reference signal; the indication information of the measured device corresponding to the path includes a device identifier of the measured device or an identifier of the measured reference signal.

In one possible example, the predefined threshold may be one value or may be multiple values.

when the measurement result is greater than the first threshold, reporting that the measurement result is high (that is, the measurement result level is high) and indicating the measured device identifier, where the measurement result is high and is represented by any one of the following manners: the measurement result is at a first level; index indicating that the measurement result is high; measuring a result value; and a high indication corresponding to the measurement result; wherein the measured device identifier represents the device identifier of the path link;

when the measurement result is greater than the second threshold and smaller than the first threshold, reporting the measurement result (that is, the measurement result level is medium) and indicating the measured device identifier at the same time, where the measurement result is expressed by any one of the following manners: the measurement result is at a second level; indicating an index in the measurement result; measuring a result value; and a medium indication corresponding to the measurement result; the measured device id is the device id indicating the path link.

In one possible example, the first threshold is threshold _ h and the second threshold is threshold _ m.

In the present invention, "greater than" may be replaced with "greater than or equal to" and "less than" may be replaced with "less than or equal to". In the invention, the identification can be ID or index; a cooperative group may also be referred to as a group; the relay may also be referred to as forwarding, or relay transmission, or transport.

In one possible example, the device identification includes any one or more of: absolute identification; taking values of a part of the absolute identification; a Radio Network Temporary Identifier (RNTI) of the associated node; a portion of the RNTI of the associated node; and a relative identification in the defined cooperative group for forwarding communications; and when represented as the relative identity, the device identity comprises a joint indication of the group identity and the relative identity.

In one possible example, the multi-hop path includes a first device, a second device and a third device, where the first device is a source device and the second device is a target device.

In one possible example, the method further comprises: the third device obtains path indication information, where the path indication information is used to indicate a target transmission path.

In one possible example, the method further comprises: the third equipment receives first control information from the first equipment, wherein the first control information comprises a source identifier and a destination identifier; and the third equipment relays the data scheduled by the first control information according to the path indication information.

In one possible example, the first SCI is a primary SCI, or a first SCI or a second SCI of the secondary SCIs.

In one possible example, the path indication information includes information indicating the target transmission path or information indicating a target relay device; wherein the information for indicating the target transmission path includes at least one of: an identifier of a transmission path including the first device, the target relay device, and the second device; the identification of the transmission path comprising the target transfer device and the second device; including an identification of a transmission path of the second device; and an identification of a transmission path including the first device and the second device; the information for indicating the target relay apparatus includes at least one of: the equipment identification of the target transfer equipment; a device identification of the first device; a device identification of the second device; wherein the target relay apparatus includes the third apparatus.

In one possible example, the relaying, by the third device, the data scheduled by the first control information according to the path indication information includes: the third equipment determines whether to transfer the side link data scheduled by the first control information according to the acquired path indication information; and when the third device determines to relay the sidelink data scheduled by the first control information, the third device sends second control information, wherein the second control information comprises the source identifier and the destination identifier.

In one possible example, the second control information is a second SCI.

In one possible example, the first control information further includes priority indication information; the third device sends second control information, including: and when the third equipment detects that the priority indication information is greater than or equal to a first preset threshold, the third equipment sends the second control information according to the link quality information.

In one possible example, the path indication information includes a transmission decision factor of the third device; the third device sends second control information, including: the third device generates a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second control information according to the link quality information.

In one possible example, the first control information further includes priority indication information; the path indication information includes a transmission decision factor of the third device; the third device sends second control information, including: when the third device detects that the priority indication information is smaller than the first preset threshold, generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second SCI according to the link quality information.

In a third aspect, an embodiment of the present invention provides a method for transmitting data in a multi-hop path, where the multi-hop path includes a first device, a second device, and a third device, the first device is a source device, and the second device is a target device, where the method includes:

and the third equipment transfers the data scheduled by the first control information according to the first control information.

In one possible example, the first control information further includes indication information whether to trigger the relay transmission, and/or indication information whether to trigger the simultaneous relay transmission;

in one possible example, the first control information further includes time indication information of relay transmission.

In one possible example, the first control information further includes information indicating the number of times of relay transmission.

In one possible example, the second control information is a second SCI.

In one possible example, the method further comprises: and the third equipment reports the measurement result of the side link to the network equipment, wherein the measurement result is obtained by measurement based on the reference signal of the side link control channel PSCCH or the side link data channel PSSCH.

when the measuring result is larger than or equal to a predefined threshold value, reporting the measuring result; or reporting the measurement result and the indication information of the measured equipment corresponding to the measurement result; or reporting the identified path and the indication information of the measured equipment corresponding to the path;

when the measurement result is greater than the first threshold, reporting that the measurement result is high (that is, the measurement result level is high) and indicating the identifier of the measured device, where the measurement result is high and is represented by any one of the following manners: the measurement result is at a first level; index indicating that the measurement result is high; measuring a result value; and a high indication corresponding to the measurement result; wherein the measured device identifier represents the device identifier of the path link;

when the measurement result is greater than the second threshold and smaller than the first threshold, reporting the measurement result (that is, the measurement result level is medium) and indicating the measured device identifier, where the measurement result is represented by any one of the following manners: the measurement result is at a second level; indicating an index in the measurement result; measuring a result value; and a medium indication corresponding to the measurement result; the measured device id is the device id indicating the path link.

In a fourth aspect, an embodiment of the present invention provides a multi-hop path data transmission apparatus, which is applied to a third device, where a multi-hop path includes a first device, a second device, and a third device, the first device is a source device, and the second device is a target device; the apparatus comprises a processing unit and a communication unit, wherein,

the processing unit is used for receiving first control information from the first equipment through the communication unit, wherein the first control information comprises a source identifier and a destination identifier; and transferring the data scheduled by the first control information according to path indication information, wherein the path indication information is used for indicating a target transmission path.

In a fifth aspect, an embodiment of the present invention provides a communication apparatus, where the terminal is a third device, and the communication apparatus includes a memory, a transceiver, and at least one processor, where the memory stores instructions, and the memory, the transceiver, and the at least one processor are interconnected by a line, and the processor is configured to invoke the instructions to perform steps in any one of the methods of the first aspect, the second aspect, and the third aspect.

In a sixth aspect, an embodiment of the present invention provides a communication apparatus, including a processor and an interface circuit;

the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor; the processor executes the code instructions to perform the steps of the method of any of the first, second or third aspects.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions, which, when executed, cause steps in the method according to any one of the first aspect, the second aspect or the third aspect to be implemented.

In an eighth aspect, an embodiment of the present invention provides a computer program product, which when run on a device, performs the steps in the method of any one of the first aspect, the second aspect or the third aspect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the embodiments or the background art of the present invention will be described below.

Fig. 1 is a system architecture diagram of a communication system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 4a is a flowchart illustrating a multi-hop path data transmission method according to an embodiment of the present invention;

FIG. 4b is an exemplary diagram of a node combination for multiple paths provided by an embodiment of the present invention;

fig. 4c is a schematic diagram of multiple transmission paths between the first device and the second device according to an embodiment of the present invention;

fig. 4d is a flowchart illustrating another multi-hop path data transmission method according to an embodiment of the present invention;

fig. 4e is a flowchart illustrating another multi-hop path data transmission method according to an embodiment of the present invention;

fig. 5 is a block diagram illustrating functional units of a multi-hop path data transmission apparatus according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application. The communication system 100 may be a fifth generation 5G mobile communication system, a sixth generation 6G mobile communication system, and any future communication system, which may include at least one network device 101 (only 1 shown) and one or more terminal devices 102 connected to the network device 101. Network device 101 may communicate wirelessly with terminal device 102 through one or more antennas. Each network device 101 may provide communication coverage for a respective coverage area 104. The coverage area 104 corresponding to the network device 101 may be divided into a plurality of sectors (sectors), wherein one sector corresponds to a portion of the coverage area (not shown).

In this embodiment, the network device 101 may include: a Base Transceiver Station (Base Transceiver Station), a wireless Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Node B (Node B), an evolved Node B (eNB or eNodeB), or a next-generation Node B (gNB), etc. The communication system 100 may include several different types of network devices 101, such as macro base stations (macro base stations), micro base stations (micro base stations), and so on. The network device 101 may also be a small station, a Transmission Reference Point (TRP), or the like. Network device 101 may apply different radio technologies, such as a cell radio access technology, or a WLAN radio access technology.

In the embodiment of the present application, the terminal device 102 is a device with a wireless transceiving function, which can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. A terminal device may also be referred to as a User Equipment (UE), a terminal (terminal), an access terminal, a UE unit, a UE station, a mobile device, a mobile station (mobile station), a mobile terminal, a mobile client, a mobile unit (mobile unit), a remote station, a remote terminal device, a remote unit, a wireless communication device, a User agent, a User Equipment, or the like.

It should be noted that the terms "system" and "network" in the embodiments of the present application may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present application. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

Referring to fig. 2, fig. 2 shows a terminal device provided in an embodiment of the present application. As shown in fig. 2, the terminal device 200 may include: input-output modules (including audio input-output module 218, key input module 216, and display 220, etc.), user interface 202, one or more processors 204, transmitter 206, receiver 208, coupler 210, antenna 214, and memory 212. These components may be connected by a bus or other means, with fig. 2 exemplified by a bus connection. Wherein:

the antenna 214 may be used to convert electromagnetic energy into electromagnetic waves in free space or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line. The coupler 210 is used to split the mobile communication signal received by the antenna 214 into multiple paths and distribute the multiple paths to the plurality of receivers 208.

The transmitter 206 may be used to transmit the signal output by the processor 204.

Receiver 208 may be used for receive processing of mobile communication signals received by antenna 214.

In the present embodiment, the transmitter 206 and the receiver 208 may be considered as one wireless modem. In the terminal device 200, the number of the transmitters 206 and the receivers 208 may be one or more.

In addition to the transmitter 206 and receiver 208 shown in fig. 2, the terminal device 200 may also include other communication components, such as a GPS module, a Bluetooth (Bluetooth) module, a Wireless Fidelity (Wi-Fi) module, and so forth. Not limited to the above-expressed wireless communication signals, the terminal device 200 may also support other wireless communication signals, such as satellite signals, short-wave signals, and the like. Not limited to wireless communication, the terminal device 200 may also be configured with a wired network interface (such as a LAN interface) 201 to support wired communication.

The input and output module may be used to enable interaction between the terminal device 200 and a user/external environment, and may mainly include an audio input and output module 218, a key input module 216, a display 220, and the like. Specifically, the input/output module may further include: cameras, touch screens, sensors, and the like. Wherein the input and output modules are in communication with the processor 204 through the user interface 202.

The memory 212 may be coupled to the processor 204 via a bus or an input-output port, and the memory 212 may be integrated with the processor 204. The memory 212 is used to store various software programs and/or sets of instructions. In particular, the memory 212 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices. The memory 212 may store an operating system (hereinafter referred to simply as a system), such as an embedded operating system like ANDROID, IOS, WINDOWS, or LINUX. The memory 212 may also store network communication programs that may be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices. The memory 212 may also store a user interface program, which may vividly display the content of the application program through a graphical operation interface, and receive the control operation of the application program from the user through input controls such as menus, dialog boxes, and buttons.

In the embodiment of the present application, the memory 212 may be used to store an implementation program of the multi-hop path data transmission method provided in one or more embodiments of the present application. For the implementation of the multi-hop path data transmission method provided in one or more embodiments of the present application, please refer to the following embodiments.

The processor 204 may be used to read and execute computer readable instructions. Specifically, the processor 204 may be configured to invoke a program stored in the memory 212, for example, a program for implementing the multi-hop path data transmission method provided in one or more embodiments of the present application, and execute instructions included in the program to implement the method according to the following embodiments. The processor 204 may support: one or more of Global System for Mobile Communication (GSM) (2G) Communication, Wideband Code Division Multiple Access (WCDMA) (3G) Communication, and Long Term Evolution (LTE) (4G) Communication, and 5G Communication, among others. Optionally, when the processor 204 sends any message or data, it does so, in particular by driving or controlling the transmitter 206.

Optionally, when the processor 204 receives any message or data, it does so, in particular by driving or controlling the receiver 208. Thus, the processor 204 may be considered a control center that performs transmission or reception, with the transmitter 206 and receiver 208 being specific actors performing transmission and reception operations.

It is understood that the terminal device 200 may be the terminal device 102 in the communication system 100 shown in fig. 1, and may be implemented as a User Equipment (UE), a terminal (terminal), an access terminal, a UE unit, a UE station, a mobile device, a mobile station (mobile station), a mobile terminal, or the like.

It should be noted that the terminal device 200 shown in fig. 2 is only one implementation manner of the embodiment of the present application, and in practical applications, the terminal device 200 may further include more or less components, which is not limited herein.

Referring to fig. 3, fig. 3 illustrates a network device provided by an embodiment of the present application. As shown in fig. 3, the network device 300 may include: one or more processors 301, memory 302, network interface 303, transmitter 305, receiver 306, coupler 307, and antenna 308. These components may be connected by a bus 304 or otherwise, as illustrated in FIG. 3 by a bus. Wherein:

network interface 303 may be used for network device 300 to communicate with other communication devices, such as other network devices. In particular, the network interface 303 may be a wired interface.

Transmitter 305 may be used to perform transmit processing, e.g., signal modulation, on the signal output by processor 301. Receiver 306 may be used for receive processing of mobile communication signals received by antenna 308. Such as signal demodulation. In some embodiments of the present application, the transmitter 305 and the receiver 306 may be considered as one wireless modem. In the network device 300, the number of the transmitters 305 and the receivers 306 may be one or more. Antenna 308 may be used to convert electromagnetic energy in transmission line to electromagnetic wave in free space or vice versa. Coupler 307 may be used to multiplex the mobile communications signal to a plurality of receivers 306.

The memory 302 may be coupled to the processor 301 via the bus 304 or an input/output port, and the memory 302 may be integrated with the processor 301. The memory 302 is used to store various software programs and/or sets of instructions. In particular, the memory 302 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory 302 may store an operating system (hereinafter, referred to as a system), such as an embedded operating system like uCOS, VxWorks, RTLinux, etc. The memory 302 may also store a network communication program that may be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.

The processor 301 may be used to perform radio channel management, implement call and communication link setup and teardown, provide cell handover control for users within the control area, and the like. Specifically, the processor 301 may include: an Administration/Communication Module (AM/CM) (a center for voice channel switching and information switching), a Basic Module (BM) (for performing call processing, signaling processing, radio resource management, management of radio links, and circuit maintenance functions), a code conversion and sub-multiplexing unit (TCSM) (for performing multiplexing/demultiplexing and code conversion functions), and so on.

In embodiments of the present application, the processor 301 may be configured to read and execute computer readable instructions. Specifically, the processor 301 may be configured to call a program stored in the memory 302, for example, a program for implementing the multi-hop path data transmission method provided in one or more embodiments of the present application, and execute instructions included in the program.

It is understood that the network device 300 may be the network device 101 in the communication system 100 shown in fig. 1, and may be implemented as a base station, a wireless transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a NodeB, an eNodeB, a gNB, and so on.

It should be noted that the network device 300 shown in fig. 3 is only one implementation manner of the embodiment of the present application, and in practical applications, the network device 300 may further include more or less components, which is not limited herein.

In this embodiment, according to a positional relationship between a signal coverage of a base station and a terminal device, the terminal device 102 may be specifically divided into an in-coverage ue (in coverage ue), an in-coverage ue (in coverage edge ue), an out-coverage edge ue (out of coverage edge ue), and an out-coverage ue (out of coverage ue), where a first device described in the following embodiments may be the network device 101 or the terminal device 102, a relay device may be the network device 101 or the terminal device 102, and a second device may be the network device 101 or the terminal device 102.

Referring to fig. 4a, fig. 4a is a flowchart illustrating a multi-hop path data transmission method according to an embodiment of the present invention, where the method may be implemented based on the communication system shown in fig. 1, where the multi-hop path includes a first device, a second device, and a third device, the first device is a source device, and the second device is a destination device. The method includes, but is not limited to, the steps of:

the application scene of the invention can be a base station, UE in coverage, UE outside coverage, or an interconnection link among a plurality of UEs.

Step S401: the third device receives first control information from the first device, wherein the first control information comprises a source identifier and a destination identifier.

In practical application, any device may be designated as a source device, and the first device is taken as an example to describe in detail in the embodiment of the present application.

In the present application, the destination identifier is used to identify the target device.

The third device may be a relay device, such as a device belonging to one or more relay devices.

The source identifier source ID may be a node identifier node ID of a source node, or a device identifier device ID of a source device source, or a source identifier defined by a traffic flow of a communication code stream, which is not limited uniquely here. Similarly, the destination identifier ID may be a node identifier node ID of the destination node, or an equipment identifier device ID of the destination equipment device, or a destination identifier defined by the traffic flow of the communication code stream.

Any one of the node identifier, the device identifier, the source identifier, or the destination identifier may include any one of the following: absolute identification; taking values of a part of the absolute identification; a Radio Network Temporary Identifier (RNTI) of the associated node; a portion of the RNTI of the associated node; and a relative identification in the defined cooperative group for forwarding communications; and when represented as the relative identity, the device identity comprises a joint indication of the group identity and the relative identity.

As shown in fig. 4b, a plurality of path schematics may be configured, where a node included in any one of the at least one transmission path may be any one of the following combinations: { base station, relay UE, target UE }, { UE, relay UE, base station }, { UE, relay UE, target UE }, { UE, one-hop relay UE, … N-hop relay UE, target UE }, { base station, one-hop relay UE, … N-hop relay UE, target UE }, { UE, one-hop relay UE, … N-hop relay UE, target base station }, { base station, relay base station, target base station }, { base station, one-hop relay UE, … N-hop relay UE, target base station }, { base station, one-hop relay base station, … N-hop relay base station, and target base station }.

Specifically, for a combination { base station, relay UE, target UE }, the first device corresponds to the base station in the current combination, the relay device corresponds to the relay UE in the current combination, the target device corresponds to the target UE in the current combination, the relay UE may specifically be any one of an in-coverage UE and an in-coverage UE, and the target UE may be any one of an in-coverage UE, an out-coverage UE and an out-coverage UE. The distribution can be divided into various types according to the actual position, and the detailed examples are described below.

First, the relay UE is an in-coverage UE, and the target device is an in-coverage UE away from the base station L1.

Second, the relay UE is an in-coverage UE, and the target device is an outer-coverage UE away from the base station L2.

Thirdly, the relay UE is an in-coverage UE, the target device is an out-coverage UE located at a distance L3 from the base station, L1 is smaller than L2, and L2 is smaller than L3.

Fourth, the relay UE is an inner coverage edge UE, and the target device is an outer coverage edge UE away from the base station L2.

Fifth, the relay UE is an inner coverage UE, and the target device is an outer coverage UE away from the base station L3.

For a combination { UE, relay UE, base station }, where the first device corresponds to the UE in the current combination, the relay device corresponds to the relay UE in the current combination, the target device corresponds to the base station in the current combination, and both the UE and the relay UE are terminal devices, multiple types of combinations can be formed according to the actual location distribution of the devices, which will be described in detail below.

First, the first device is an out-coverage UE, and the relay UE is an in-coverage UE.

In the second type, the first device is an out-of-coverage UE, and the relay UE is an in-coverage UE.

And thirdly, the first equipment is covered outer edge UE, and the relay UE is covered inner edge UE.

And fourthly, the first equipment is covered outer edge UE, and the relay UE is covered inner UE.

And fifthly, the first device is a coverage inner edge UE, and the relay UE is the coverage inner edge UE.

And sixthly, the first equipment is covered inner edge UE, and the relay UE is covered inner edge UE.

And seventhly, the first equipment is in-coverage UE, and the relay UE is in-coverage UE.

For a combination { UE, relay UE, target UE }, the first device corresponds to the UE in the current combination, the relay device corresponds to the relay UE in the current combination, the target device corresponds to the target UE in the current combination, the UE, the relay UE and the target UE are all terminal devices, various types of combinations can be formed according to the actual position distribution condition of the devices, and the combination is not limited uniquely here.

For a combination { UE, one-hop relay UE, … N-hop relay UE, target UE }, where the first device corresponds to the UE in the current combination, the relay device corresponds to one-hop relay UE, … N-hop relay UE in the current combination, the target device corresponds to the target UE in the current combination, and the UE, the one-hop relay UE, … N-hop relay UE, and the target UE are all terminal devices, and multiple types of combinations can be formed according to the actual location distribution of the devices, which is not limited herein.

For a combination { base station, one-hop relay UE, … N-hop relay UE, target UE }, where the first device corresponds to the base station in the current combination, the relay device corresponds to one-hop relay UE and … N-hop relay UE in the current combination, the target device corresponds to the target UE in the current combination, the UE, the one-hop relay UE, … N-hop relay UE, and the target UE are all terminal devices, and the one-hop relay UE, the … N-hop relay UE, and the target UE are all terminal devices, and may form various combinations according to actual location distribution conditions of the devices, which is not limited uniquely here.

In the above various combinations, the link between the terminal devices may be a sidelink, but is not limited to a sidelink application scenario, and may be an unlicensed spectrum system, and may be an integrated access and backhaul link system, and the sidelink is not limited to D2D, V2V, V2X scenarios, and the like.

Step S402: and the third equipment transfers the data scheduled by the first control information according to path indication information, wherein the path indication information is used for indicating a target transmission path.

The relay may be replaced by sending, or transmitting, or relaying transmission, which is not limited herein.

In a possible example, before the third device relays the data scheduled by the first control information according to the path indication information, the method further includes: and the third equipment acquires the path indication information. In a specific implementation, the third device may receive the path indication information from the network device, or receive the path indication information from the first device, and the like, which is not limited herein.

Wherein the target transmission path is a path of at least one transmission path between the source device and the target device. As an example, the path is a one-hop or multi-hop transmission path from the source device to the destination device, or a one-hop or multi-hop transmission path from any one destination relay device to the destination device, or a one-hop or multi-hop transmission path from the next-hop device of the source device to the destination device, or a one-hop or multi-hop transmission path from the next-hop device of any one destination relay device to the destination device.

In addition, the first device and the second device may also form a direct connection path, that is, data transmitted by the first device may be directly received by the second device, and when the channel state of the direct connection path is not good, reliability of the data may be enhanced through transmission or data forwarding on another supplementary link.

In a possible example, the path indication information may be generated by the network device according to measurement information reported by the device when a preset reporting condition is met, where the measurement information is used to indicate a channel state of a direct-connected transmission link between the device and the measured device. The devices in the target transmission path may report the measurement information step by step according to the path topology, that is, the latter node device reports the former node device in sequence.

For example: when one UE is an in coverage UE but not belongs to the in coverage edge UE, reporting a measurement result from the in coverage edge UE; when one UE is in coverage edge UE, reporting the measurement result from out of coverage UE.

In a possible example, the devices in the target transmission path may also report directly to the network device.

Wherein, in the scenario of integrating access and backhaul link, the measurement information includes at least one of the following: measurement results, indication information of the measured apparatus, path information of a transmission link between the apparatus and the measured apparatus, indication information of the measured apparatus, level indication information of the measurement results, or an identity of the measured apparatus. Wherein the path information includes link quality. The measurement result may be obtained by measurement based on a reference signal of a control channel PSCCH on the side link or a data channel PSCCH on the side link, for example. In a possible example, the measurement information may be any one of: measurement results and indication information of the measured device; path information of a transmission link between the device and the measured device and indication information of the measured device, the path information including link quality; and level indication information of the measurement result and an identity of the measured device. The measurement result may be obtained by measurement based on a reference signal of a control channel PSCCH on the side link or a data channel PSCCH on the side link, for example. The measurement result includes any one of: side link-Reference Signal Receiving Power (SL-RSRP), side link-Reference Signal Receiving Quality (SL-RSRQ), or side link received Signal strength indication SL-RSSI. The Reference Signal may include a Demodulation Reference Signal (DMRS), a Channel State indication-Reference Signal (CSI-RS), or the like. The measurement result further includes any one of: a backhaul link (BH) reference signal received power BH-RSRP, a backhaul link reference signal received quality BH-RSRQ, or a backhaul link received signal strength indication BH-RSSI. The Reference Signal may include a demodulation Reference Signal DMRS, or a channel state indication-Reference Signal CSI-RS, or a channel Sounding Reference Signal (SRS), or a preamble, or a Tracking Reference Signal (TRS), etc.

In a specific implementation, the third device may report a measurement result of the Sidelink to the network device, where the measurement result is obtained by measuring based on a reference signal of a Sidelink Control Channel (PSCCH) or a Sidelink data Channel (PSCCH).

The measurement result is obtained by the third device measuring a reference signal from at least one of the first device, the second device, or one or more relay devices.

The multi-hop path includes a first device, a second device and a third device, where the first device is a source device, the second device is a target device, and the third device belongs to a transit device.

In a specific implementation, the third device may report a measurement result of the backhaul link to the network device, where the measurement result is obtained by measuring based on a reference signal of the backhaul link.

In addition, the third device may also report location information to the network device.

the indication information of the measured equipment corresponding to the measurement result comprises an equipment identifier of the measured equipment or an identifier of a measured reference signal; the indication information of the measured device corresponding to the path includes a device identifier of the measured device or an identifier of the measured reference signal.

Wherein the predefined threshold may be one value or a plurality of values.

Wherein the reporting trigger condition and the reporting content of the measurement result include at least one of the following items:

when the measurement result is greater than the first threshold, reporting that the measurement result is high (that is, the measurement result level is high) and indicating the UE device identifier ID to be measured, where the measurement result is high and is represented by any one of the following manners: the measurement result is at a first level; index indicating that the measurement result is high; measuring a result value; and a high indication corresponding to the measurement result; wherein the measured device identifier represents the device identifier of the path link;

Wherein, the first threshold is threshold _ h, and the second threshold is threshold _ m.

In the present invention, "greater than" may be replaced with "greater than or equal to" and "less than" may be replaced with "less than or equal to". In the invention, the identification can be an Identity Document (ID) or an index; a cooperative group may also be referred to as a group; the relay may also be referred to as forwarding, or relay transmission, or transport.

Wherein the device identification comprises any one or more of the following: absolute identification; taking values of a part of the absolute identification; a Radio Network Temporary Identifier (RNTI) of the associated node; a portion of the RNTI of the associated node; and a relative identification in the defined cooperative group for forwarding communications; and when represented as the relative identity, the device identity comprises a joint indication of the group identity and the relative identity.

Wherein the identifier is an index or an ID.

Wherein the indication information of the measured device comprises an identifier of the measured device or an identifier of a measured reference signal.

In the embodiment of the application, the value greater than or equal to the value can be replaced by value less than or equal to the value; reporting can be replaced by reporting; the links may be replaced with connections.

Therefore, in the embodiment of the application, when the third device performs data transfer, the transfer does not need to be performed according to the scheduling of the network device, and the home terminal can autonomously determine to perform data transfer according to the path indication information, which is beneficial to improving the flexibility and efficiency of data transmission in a multi-hop path.

In one possible example, the first control information is sidelink control information SCI.

In this possible example, the first SCI is the primary SCI, or the first SCI or the second SCI of the secondary SCIs. In a specific implementation, when the first control information is SCI, the first device, the one or more relay devices, and the second device may be terminal devices, and may form a user cooperation group, where at least one transmission path of the user cooperation group may be maintained through a data transmission path table, and specifically, the data transmission path table may be established by a network device such as a base station according to a connection relationship between devices in the current user cooperation group. The data transmission path table may contain any paths capable of cooperative communication, and the transmission paths maintained may be divided into different types according to link conditions. For example, for a transmission path with a medium link condition, simultaneous data transmission is supported to ensure reliable communication, and for a transmission path with a high link condition, independent data transmission is supported, such as for transmitting one Transport Block (TB) at a time, where the link condition high and the link condition medium refer to the level of link quality.

The data transmission path table may specifically include at least one of the following information of one or more transmission paths: device identification, path index, transmission capability indication (indicating individual or simultaneous transmission), device identification of the connection, link condition, transmit decision factor. The connected device may be a previous hop device identifier or a next hop device identifier. The connected device may also be a previous hop device identifier or a next hop device identifier. The connected device may also be a device identifier of a previous X hop or a device identifier of a next Y hop, where X is greater than or equal to 1 and Y is greater than or equal to 1.

For example, as shown in fig. 4c, a schematic diagram of a multi-hop path of a user cooperative group is assumed that there are 6 transmission paths between a first device (shown as SUE) and a second device (shown as TUE), which are path P1 (transit device is UE1), path P2 (transit device is UE3), path P3 (transit device is UE4), path P4 (transit device is UE2), path P5 (transit device is UE5), and path P6 (transit device is UE 6). And the link conditions of the paths P1, P2, P3 are high; the link conditions of the paths P4, P5, P6 are medium, and belong to the intermediate level P2. The data transmission path table of the user cooperation group may be as shown in table 1. The device identification of the SUE is UE0 and the device identification of the TUE is UE 7.

TABLE 1 data transmission path table of user cooperative group

Device identification	Path index	Transmission capability indication	Connected device identification	Link condition	Sending decision factors
1	Path1	0	0，7	High	100％
3	Path2	0	0,7	High	80％
4	Path3	0	0，7	High	60％
2	Path4	1	0，7	Medium	100％
5	Path5	1	0,7	Medium	100％
6	Path6	1	0，7	Medium	100％

Wherein, the transmission capability indication 0 indicates that independent data transmission is supported, and the transmission capability indication 1 indicates that simultaneous data transmission is supported; the next hop relay device 0 indicates that there is no next hop relay device, that is, the current transmission path is a 2 hop path.

As can be seen, in this example, for the devices in the user cooperation group, the relay device does not need to perform relay according to the scheduling of the network device, and the home terminal can autonomously determine to perform data relay according to the path indication information, which is beneficial to improving the flexibility and efficiency of data transmission in the multi-hop path of the user cooperation group.

In one possible example, the path indication information includes information indicating the target transmission path or information indicating a target relay device;

wherein, the information for indicating the target transmission path is any one or combination of more of the following: a transmission path including the first device, the target relay device, and the second device; a transmission path including the target relay device and the second device; a transmission path including the second device; and a transmission path including the first device and the second device.

Wherein the information for indicating the target relay device includes any one or a combination of more than one of the following: the target transfer device; the first device, the target transfer device and the second device; the target transfer device and the second device; the second device; and, the first device and the second device;

wherein the third device belongs to the target transfer device.

Wherein, the target transfer device identifier includes any one of the following: absolute identity information of the user equipment; index information corresponding to absolute identity information of the user equipment; relative identity information of user equipment defined within the user collaboration group; and joint indication information of the group identity information of the user cooperation group and the relative identity information of the user equipment. The index information corresponding to the absolute identity information of the user equipment may be a part of values of the absolute identity information.

Wherein the transmission path identification includes index information of the transmission path.

As can be seen, in this example, the path indication information may directly include the indication information of the target transmission path, and may completely indicate the entire transmission path; alternatively, the path indication information may include indication information of the target relay device, thereby accurately indicating the condition of the next hop device of the target relay device.

In a specific implementation, the third device may determine whether path information from the local device to the second device exists according to the obtained path indication information, and if so, determine to relay the sidelink data scheduled by the first control information.

As can be seen, in this example, the second control information includes the source identifier and the destination identifier, so that when the next hop device of the third device receives the second control information, if the next hop device is the second relay device, the second relay device may determine to forward data according to the path indication information obtained by the local terminal, and if the next hop device is the second device, the second device determines to receive data, so as to ensure continuity and accuracy of data relay transmission.

In this possible example, the first control information and the second control information further include a transmission time interval for forwarding data.

In this possible example, the second control information is the second SCI.

In this possible example, the second SCI is the primary SCI, or the primary SCI or the secondary SCI of the secondary SCIs.

The first stage can also be called as a first stage, the second stage can be called as a second stage, the first stage can be called as a first stage, the second stage can be called as a second stage, and the calling is not limited uniquely.

In this possible example, the path indication information includes link quality information of the target transmission path.

The link quality information is used to indicate the data transmission capability of the target transmission path, and the specific expression of the data transmission capability is not limited, and may be, for example, expressed by the aforementioned link conditions high and medium, or expressed by strong, medium, or weak. The comprehensiveness of the path indication information is improved.

In this possible example, the first control information further includes priority indication information; the third device sends second control information, including: and when the third equipment detects that the priority indication information is greater than or equal to a first preset threshold, the second control information is sent according to the link quality information.

The priority indication information is quality of service (QoS) indication information, or quality of service indication information, or priority information.

The first preset threshold may be a predefined threshold value, which is not limited herein.

In a specific implementation, if the link quality information is high, the third device may send the second control information separately, and if the link quality information is low, the third device may send the second control information simultaneously with other devices.

In addition, if it is detected that the priority indication information is smaller than the first preset threshold, the third device may not send data or decide whether data occurs in other manners. And are not intended to be limiting.

Therefore, in this example, the data transmission of the relay device is constrained by the priority indication information, so that the data transmission pressure of the relay device is prevented from being increased due to the indiscriminate transmission of all legal data by the relay device, and the utilization rate of transmission resources is balanced.

Wherein the sending decision factor is a decision factor for determining whether to forward data or send data.

As can be seen, in this example, by restricting data transmission of the relay device by the decision random number and the transmission decision factor, it is possible to avoid that all legal data are indiscriminately transmitted by the relay device, which increases the data transmission pressure of the relay device, and equalize the utilization rate of transmission resources.

In one possible example, the first control information further includes priority indication information; the path indication information further includes a transmission decision factor of the third device; the third device sends second control information, including: when the third device detects that the priority indication information is smaller than the first preset threshold, generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second SCI according to the link quality information.

Wherein the transmission decision factor may be a percentage value, such as 100%, 60%, etc. listed in table 1. The value range of the transmission decision random number is [0, 1 ].

In addition, if it is detected that the priority indication information is greater than or equal to the first preset threshold, the third device sends the second SCI directly according to the link quality information.

It can be seen that, in this example, the data transmission of the relay device is constrained at the first level by the priority indication information, and the data transmission of the relay device is further constrained at the second level by sending the decision factor, so that it is possible to avoid that the data transmission pressure is increased by the relay device because all legal data needs to be forwarded, and the utilization rate of the transmission resources is balanced.

In one possible example, the first control information further comprises quality indication information; the path indication information further includes a transmission decision factor of the third device; the third device sends second control information, including: when the third equipment detects that the quality indication information is smaller than the first quality indication information, generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second SCI according to the link quality information.

In addition, if the quality indication information is detected to be greater than or equal to the first quality indication information, the third device sends the second SCI directly according to the link quality information.

It can be seen that, in this example, the data transmission of the transit device is constrained at the first level by the quality indication information, and the data transmission of the transit device is further constrained at the second level by sending the decision factor, so that it is possible to avoid that the transit device increases the data transmission pressure due to the need to forward all legal data, and balance the utilization rate of the transmission resources.

In one possible example, the obtaining of the path indication information includes any one of the following implementations: obtaining through pre-configuration; and obtaining from the network device through signaling, wherein the signaling is at least one of Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or physical layer signaling. The content contained in the path indication information may also be obtained partly by pre-configuration and partly by signalling from the network device.

Wherein, the content contained in the path indication information can be obtained by pre-configuration; or, all the information is acquired from the network equipment through signaling; or part of the information is acquired through pre-configuration, and part of the information is acquired from the network equipment through signaling; wherein the signaling is at least one of Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or physical layer signaling.

For example, the sending decision factor is obtained by pre-configuration, the information for indicating the target transmission path is obtained from the network device through RRC signaling, the information for indicating the target relay device is obtained from the network device through MAC signaling, and the link quality information of the target transmission path is obtained from the network device through physical layer signaling.

For the pre-configuration, the path indication information may be configured when the device initially accesses the network, or configured when the device performs cell handover, and the like, which is not limited herein.

Specifically, for obtaining from the network device through the signaling, the network device may notify the path indication information through a broadcast signaling (for example, SIB), or the network device issues a user equipment dedicated signaling (dedicated signaling) to configure the path indication information, which is not limited herein.

When the network device notifies the path indication information through broadcast signaling, some or all of the information in the above table may be referred to. When the network device configures the path indication information through user equipment-specific signaling, for example, to the UE1, only the path indication information related to the device identity 1 needs to be notified, i.e., part or all of the information in the following table may be selected.

TABLE 2 data transmission path table of user cooperative group

Path index	Transmission capability indication	Connected device identification	Link condition	Sending decision factors
Path1	0	0，7	High	100％
Path 2	1	1,5	Medium	80％

As can be seen, in this example, the configuration of the path indication information can be flexibly implemented in different ways, so that the indication flexibility is improved.

Referring to fig. 4d, fig. 4d is a flowchart illustrating a multi-hop path data transmission method according to an embodiment of the present invention, which may be implemented based on the communication system shown in fig. 1 and shares an extension with the embodiment of the method shown in fig. 4a, where the method includes, but is not limited to, the following steps:

step S4d 01: and the third equipment reports the measurement result of the side link to the network equipment, wherein the measurement result is obtained by measurement based on the reference signal of the side link control channel PSCCH or the side link data channel PSSCH.

In the present invention, "greater than" may be replaced with "greater than or equal to" and "less than" may be replaced with "less than or equal to". In the invention, the identification can be ID or index; a cooperative group may also be referred to as a group; the relay may also be referred to as forwarding, or relaying transmission, or transmission.

In one possible example, the multi-hop path includes a first device, a second device and a third device, where the first device is a source device and the second device is a target device. In other words, the first device and the second device form at least one transmission path through one or more relay devices, where the transmission path is an N-hop path, and N is an integer greater than or equal to 2.

In one possible example, the method further comprises: the third equipment receives first control information from the first equipment, wherein the first control information comprises a source identification and a destination identification; and the third equipment transfers the data scheduled by the first control information according to the path indication information.

In one possible example, the path indication information includes information indicating the target transmission path or information indicating a target relay device; wherein the information for indicating the target transmission path includes at least one of: an identifier of a transmission path including the first device, the target relay device, and the second device; the identification of the transmission path comprising the target transfer device and the second device; including an identification of a transmission path of the second device; and an identification of a transmission path comprising the first device and the second device; the information for indicating the target relay apparatus includes at least one of: the equipment identification of the target transfer equipment; a device identification of the first device; a device identification of the second device; wherein the target relay apparatus includes the third apparatus.

In one possible example, the second control information is a second SCI.

Referring to fig. 4e, fig. 4e is a flowchart illustrating a multi-hop path data transmission method according to an embodiment of the present invention, where the method may be implemented based on the communication system shown in fig. 1, and shares extended content with the method embodiment of fig. 4a, where the multi-hop path includes a first device, a second device, and a third device, where the first device is a source device, and the second device is a target device. The method includes, but is not limited to, the steps of:

step S4e01, the third device receives first control information from the first device, where the first control information includes a source identifier and a destination identifier.

Step S4e 02: and the third equipment transfers the data scheduled by the first control information according to the first control information.

As can be seen, in this embodiment of the application, the third device receives the first control information from the first device, and transfers data scheduled by the first control information according to the first control information. The first control information comprises a source identification and a destination identification; the third device can autonomously decide to perform data transit according to the first control information to provide the proximity service.

the indication information of whether to trigger the relay transmission may be indicated by a first indication field in the first control information, for example, 1 indicates triggering, and 0 indicates not triggering, and the indication information of whether to trigger the simultaneous relay transmission may be indicated by a second indication field in the first control information, for example, 1 indicates triggering of the simultaneous relay transmission, and 0 indicates not triggering of the simultaneous relay transmission.

As can be seen, in this example, the third device can determine the triggering and transmission mode of the relay according to the indication information of the first control information.

The relay transmission time indication information is a time gap or an offset between the receiving of the first control information and the relay transmission of the data.

In one possible example, the receiving the first control information may be: the starting time of the first control information is received, or the ending time of the first control information is received. Specifically, the receiving of the first control information is a start time of receiving the first control information, or an end time of receiving the first control information, and may be configured through signaling.

Wherein the time gap or the offset is used for the third device to determine a transmission time resource and relay data in the transmission time resource.

And the indication information of the transfer transmission times is that the transfer UE transmits corresponding times according to the times.

Wherein, the number of times can be single time, 2 times and the like, and is not limited herein.

In one possible example, the second control information is a second SCI.

In the present invention, the first control information may be control information sent from a first device, that is, a first device. The first control information schedules data transmission to a second device, and a destination identifier in the first control information is an identifier related to the second device.

Based on the same concept of the foregoing multi-hop path data transmission method, as shown in fig. 5, an embodiment of the present application further provides a multi-hop path data transmission apparatus 500, where the apparatus 500 includes: a transmitting/receiving unit 501; exemplarily, the following steps are carried out:

a transceiving unit 501, configured to receive first control information from the first device, where the first control information includes a source identifier and a destination identifier; and the data scheduling unit is further configured to relay the data scheduled by the first control information according to path indication information, where the path indication information is used to indicate a target transmission path.

In one implementation, the first control information is first sidelink control information SCI.

In yet another implementation, the first SCI is a primary SCI, or a first SCI or a second SCI of the secondary SCIs.

In yet another implementation, the path indication information includes information for indicating the target transmission path or information for indicating a target relay device; wherein the information for indicating the target transmission path includes at least one of: identification information of transmission paths including the first device, the target relay device, and the second device; the identification information of the transmission path including the target transfer device and the second device; including identification information of a transmission path of the second device; and identification information of a transmission path including the first device and the second device; the information for indicating the target relay apparatus includes at least one of: the equipment identification of the target transfer equipment; a device identification of the first device; and a device identification of the second device; wherein the target relay apparatus includes the third apparatus.

In another implementation, in the aspect of relaying the data scheduled by the first control information according to the path indication information, the transceiver unit 501 is specifically configured to: determining whether to transfer the sidelink data scheduled by the first control information according to the acquired path indication information; and the second control information is used for sending second control information when determining to relay the side-link data scheduled by the first control information, and the second control information comprises the source identification and the destination identification.

In yet another implementation, the second control information is a second SCI.

In yet another implementation, the second SCI is a primary SCI, or a first SCI or a second SCI of the secondary SCIs.

In yet another implementation, the path indication information includes link quality information for the target transmission path.

In yet another implementation, the first control information further includes priority indication information; in the aspect of sending the second control information, the transceiver unit 501 is specifically configured to: and when the priority indication information is detected to be greater than or equal to a first preset threshold, sending the second control information.

In yet another implementation, the first control information further includes priority indication information; in the aspect of sending the second control information, the transceiver unit 501 is specifically configured to: and when the priority indication information is detected to be greater than or equal to a first preset threshold, sending the second control information according to the link quality information.

In yet another implementation, the path indication information includes a transmission decision factor of the third device; in the aspect of sending the second control information, the transceiver unit 501 is specifically configured to: generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second control information.

In yet another implementation, the path indication information includes a transmission decision factor of the third device; in the aspect of sending the second control information, the transceiver unit 501 is specifically configured to: generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second control information according to the link quality information.

In yet another implementation, the first control information further includes priority indication information; the path indication information includes a transmission decision factor of the third device; in the aspect of sending the second control information, the transceiver unit 501 is specifically configured to: when the priority indication information is detected to be smaller than the first preset threshold, generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second SCI through the communication unit according to the link quality information.

In still another implementation, the obtaining of the path indication information includes any one of the following implementations: obtaining through pre-configuration; and obtaining from the network device through signaling, wherein the signaling is at least one of Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or physical layer signaling.

For the functions of the transceiver 501, reference may be made to the description of the terminal device in the embodiment shown in fig. 2, and details are not repeated here.

According to the multi-hop path data transmission device provided by the embodiment of the application, when data transfer is performed, transfer is not required to be performed according to scheduling of network equipment, and the local terminal can autonomously determine to perform data transfer according to the path indication information, so that the flexibility and efficiency of data transmission in a multi-hop path are improved.

Referring to fig. 6, fig. 6 is a communication apparatus 600 according to an embodiment of the present invention, where the communication apparatus is a third device, the communication apparatus 600 includes a processor 601, a memory 602, and a transceiver 603, and the processor 601, the memory 602, and the transceiver 603 are connected to each other through a bus.

The memory 602 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a portable read-only memory (CD-ROM), and the memory 602 is used for related instructions and data. The transceiver 603 is used for receiving and transmitting data.

The processor 601 may be one or more Central Processing Units (CPUs), and in the case that the processor 701 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 601 in the terminal 60 is configured to read the program code stored in the memory 602, and perform the following operations:

receiving first control information from the first device, wherein the first control information comprises a source identifier and a destination identifier; and transferring the data scheduled by the first control information according to path indication information, wherein the path indication information is used for indicating a target transmission path.

It should be noted that the implementation of each operation may also correspond to the corresponding description of the method embodiment shown in fig. 2.

The embodiment of the application also provides a communication device, which comprises a processor and an interface circuit; the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor; the processor executes the code instructions to perform some or all of the steps of any of the methods described in the above method embodiments.

The present application also provides a computer storage medium, which is used for storing instructions, and when the instructions are executed, the instructions enable the method described in any one of the above method embodiments to be implemented.

Embodiments of the present application also provide a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods as described in the above method embodiments. The computer program product may be a software installation package, the computer comprising an electronic device.

One of ordinary skill in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by hardware related to instructions of a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the above method embodiments. And the aforementioned storage medium includes: various media capable of storing program codes, such as ROM or RAM, magnetic or optical disks, etc.

Claims

A multi-hop path data transmission method is characterized in that a multi-hop path comprises a first device, a second device and a third device, the first device is a source device, the second device is a target device, and the method comprises the following steps:

the third equipment receives first control information from the first equipment, wherein the first control information comprises a source identification and a destination identification;

and the third equipment transfers the data scheduled by the first control information according to path indication information, wherein the path indication information is used for indicating a target transmission path.
The method of claim 1 wherein the first control information is first Sidelink Control Information (SCI).
The method of claim 2 wherein the first SCI is, or is either the primary SCI or the secondary SCI.
The method according to claim 1, wherein the path indication information includes information indicating the target transmission path or information indicating a target relay device;

wherein the information for indicating the target transmission path includes at least one of:

an identifier of a transmission path including the first device, the target relay device, and the second device;

the identification of the transmission path comprising the target transfer device and the second device;

including an identification of a transmission path of the second device; and

an identification of a transmission path including the first device and the second device;

the information for indicating the target relay apparatus includes at least one of:

the equipment identification of the target transfer equipment;

a device identification of the first device;

a device identification of the second device;

wherein the target relay apparatus includes the third apparatus.
The method of claim 1, wherein relaying, by the third device, the data scheduled by the first control information according to the path indication information comprises:

the third equipment determines whether to transfer the side link data scheduled by the first control information according to the acquired path indication information;

and when the third device determines to relay the sidelink data scheduled by the first control information, the third device sends second control information, wherein the second control information comprises the source identifier and the destination identifier.
The method of claim 5 wherein the second control information is a second SCI.
The method of claim 6 wherein the second SCI is, or is either the primary SCI or the secondary SCI.
The method according to claim 1 or 4, wherein the path indication information comprises link quality information of the target transmission path.
The method according to any of claims 5-7, wherein the first control information further comprises priority indication information; the third device sends second control information, including:

and when the third equipment detects that the priority indication information is greater than or equal to a first preset threshold, the second control information is sent.
The method of claim 8, wherein the first control information further comprises priority indication information; the third device sends second control information, including:

and when the third equipment detects that the priority indication information is greater than or equal to a first preset threshold, the third equipment sends the second control information according to the link quality information.
The method according to any of claims 5-7, wherein the path indication information comprises a transmission decision factor of the third device; the third device sends second control information, including:

the third device generates a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second control information.
The method according to any of the claims 8, wherein the path indication information comprises a transmission decision factor of the third device; the third device sends second control information, including:

the third device generates a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second control information according to the link quality information.
The method according to any of claims 5-7, wherein the first control information further comprises priority indication information; the path indication information includes a transmission decision factor of the third device; the third device sends second control information, including:

when the third device detects that the priority indication information is smaller than the first preset threshold, generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second SCI according to the link quality information.
The method according to any one of claims 1 to 13, wherein the obtaining of the path indication information includes any one of: obtaining through pre-configuration; and obtaining from the network device through signaling, wherein the signaling is at least one of Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or physical layer signaling.
A multi-hop path data transmission device is applied to a third device, wherein the multi-hop path comprises a first device, a second device and a third device, the first device is a source device, and the second device is a target device; the device comprises:

a transceiving unit, configured to receive first control information from the first device, where the first control information includes a source identifier and a destination identifier; and the data scheduling unit is further configured to relay the data scheduled by the first control information according to path indication information, where the path indication information is used to indicate a target transmission path.
The apparatus of claim 15 wherein the first control information is first Sidelink Control Information (SCI).
The apparatus of claim 16 wherein the first SCI is, or is either, a primary SCI or a secondary SCI.
The apparatus according to claim 15, wherein the path indication information includes information indicating the target transmission path or information indicating a target relay device;

wherein the information for indicating the target transmission path includes at least one of:

identification information of transmission paths including the first device, the target relay device, and the second device;

the identification information of the transmission path including the target transfer device and the second device;

including identification information of a transmission path of the second device; and

identification information of a transmission path including the first device and the second device;

the information for indicating the target relay apparatus includes at least one of:

the equipment identification of the target transfer equipment;

a device identification of the first device; and

a device identification of the second device;

wherein the target relay apparatus includes the third apparatus.
The apparatus according to claim 17, wherein, in the relaying the data scheduled by the first control information according to the path indication information, the transceiver unit is specifically configured to: determining whether to transfer the sidelink data scheduled by the first control information according to the acquired path indication information; and the second control information is used for sending second control information when determining to relay the side-link data scheduled by the first control information, and the second control information comprises the source identification and the destination identification.
The apparatus of claim 19 wherein the second control information is a second SCI.
The apparatus of claim 20 wherein the second SCI is, or is either the first-level SCI or the second-level SCI.
The apparatus according to claim 15 or 17, wherein the path indication information comprises link quality information of the target transmission path.
The apparatus according to any of claims 19-21, wherein the first control information further comprises priority indication information; in the aspect of sending the second control information, the transceiver unit is specifically configured to: and when the priority indication information is detected to be greater than or equal to a first preset threshold, sending the second control information.
The apparatus of claim 22, wherein the first control information further comprises priority indication information; in the aspect of sending the second control information, the transceiver unit is specifically configured to: and when the priority indication information is detected to be greater than or equal to a first preset threshold, sending the second control information according to the link quality information.
The apparatus according to any of claims 19-21, wherein the path indication information comprises a transmission decision factor of the third device; in the aspect of sending the second control information, the transceiver unit is specifically configured to: generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second control information.
The apparatus of claim 22, wherein the path indication information comprises a transmission decision factor of the third device; in the aspect of sending the second control information, the transceiver unit is specifically configured to: generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second control information according to the link quality information.
The apparatus according to any of claims 19-21, wherein the first control information further comprises priority indication information; the path indication information includes a transmission decision factor of the third device; in the aspect of sending the second control information, the transceiver unit is specifically configured to: when the priority indication information is detected to be smaller than the first preset threshold, generating a sending decision random number; and judging that the sending decision random number and the sending decision factor meet a preset size relationship, and sending the second SCI through the communication unit according to the link quality information.
The apparatus according to any one of claims 15-27, wherein the obtaining of the path indication information includes any one of: obtaining through pre-configuration; and obtaining from the network device through signaling, wherein the signaling is at least one of Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or physical layer signaling.
A communication apparatus, characterized in that the communication apparatus is a third device, and comprises a memory, a transceiver and at least one processor, the memory stores instructions, the memory, the transceiver and the at least one processor are interconnected by a line, and the processor is configured to invoke the instructions to perform the operation of transmitting uplink data in the method according to any one of claims 1 to 14.
A communication device comprising a processor and interface circuitry;

the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor; the processor executes the code instructions to perform the method of any one of claims 1-14.
A readable storage medium for storing instructions that, when executed, cause the method of any one of claims 1-14 to be implemented.