Method and related apparatus for reporting multi-hop path csi

Abstract

Embodiments of the present application disclose a multi-hop path CSI reporting method and related device, the method comprising: the multi-hop path comprising a first device, a second device and a third device, the first device being a source device, and the second device being a target device; the first device obtaining a first CSI report of a target transmission path, the first CSI report being used for indicating the target transmission path. According to the embodiments of the present application, the comprehensive channel state under the multi-hop path can be obtained at the data sending device, i.e. the source device, through the first CSI reporting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and in particular to a multi-hop path CSI reporting method and related apparatus. BACKGROUND

[0002] The Device-to-Device (D2D) technology was introduced and standardized in the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) Release 12 (Rel-12) to enable direct communication between User Equipment (UE) to meet the needs of emerging services such as Public Safety. (Note that at this time, D2D can only support UE discovery within network coverage and communication between UEs, which can be unicast or broadcast, and supports scenarios where all UEs are within network coverage, some UEs are within network coverage, some UEs are outside network coverage, and all UEs are outside network coverage.) The UE-to-Network relaying technology was introduced and standardized in LTE Rel-13. This technology enables the network to expand its coverage by using the D2D technology introduced in Rel-12 through Layer 3 relaying, so that UEs outside the network coverage can obtain services through UEs within the network coverage. In addition, in Rel-14 / 15 / 16, Vehicle-to-Everything (V2X) was successfully established as a major application of D2D technology. V2X specifically includes Vehicle-to-Vehicle (V2V), Vehicle-to-Person (V2P), Vehicle-to-Infrastructure (V2I), and Vehicle-to-Roadside Unit (V2R) various application requirements. V2V refers to LTE-based inter-vehicle communication; V2P refers to LTE-based vehicle-to-person (including pedestrians, cyclists, drivers, or passengers) communication; V2R refers to LTE-based vehicle-to-roadside device (RSU) communication, and V2N, which can be included in V2I, refers to LTE-based vehicle-to-base station / network communication. Roadside devices (RSUs) include two types: terminal-type RSUs, which are in a non-mobile state due to being placed on the roadside and do not need to consider mobility; and base station-type RSUs, which can provide timing synchronization and resource scheduling for vehicles in communication with them. Whether it is existing D2D, V2V, V2X, 5G V2X, or future sidelink application scenarios, UE cooperation can be performed.

[0003] From the perspective of communication theory development and application scenario demand, new radio (NR) Release 17 (Rel-17) is a good opportunity for user cooperation technology commercialization. From the history of 3GPP standard development, the communication between UEs, UE-to-Network relaying and other technologies involved in user cooperation have been studied in 3GPP before. Among them, UE-to-Network relaying is a technology in which one UE helps another UE and a base station to communicate, also known as relay technology. It can be considered that the previously studied D2D technology and relay technology are all components of user cooperation technology.

[0004] Currently, the data relaying in the user cooperation technology discussed in the related standards is limited to the base station to the in-coverage edge UE, and then to the out-of-coverage UE, that is, when transmitting data from the base station, if the target UE is out of the signal coverage range of the base station, the target UE cannot directly receive the transmission from the base station, and can be transferred through the in-coverage edge UE. How to obtain the channel state of such multi-hop path containing relay devices is a problem to be solved. SUMMARY

[0005] Embodiments of the present application provide a multi-hop path CSI reporting method and related apparatus, which can obtain the comprehensive channel state of the multi-hop path at the data sending device, i.e., the source device, through first CSI reporting.

[0006] In a first aspect, embodiments of the present application provide a multi-hop path CSI reporting method, the multi-hop path including a first device, a second device and a third device, the first device being a source device, and the second device being a target device; the method comprising:

[0007] The first device obtains a first CSI report of a target transmission path, the first CSI report being used to indicate the channel state of a multi-hop transmission link of the target transmission path.

[0008] By implementing the embodiments of the present application, the first device obtains the first CSI report of the target transmission path, and since the first CSI report is used to indicate the target transmission path, the comprehensive channel state of the multi-hop path can be obtained at the data sending device, i.e., the source device, through the first CSI reporting.

[0009] In a possible implementation, the first CSI report is a joint CSI report, and the joint CSI report is used to indicate the joint channel state of the multi-hop transmission link of the target transmission path. It can be seen that the joint channel state of the target transmission path can be indicated by the joint CSI report, and the accurate indication of the multi-hop transmission path can be achieved.

[0010] In a possible implementation, the first CSI report is multi-level CSI, and each level of CSI is used to indicate a CSI indication of a corresponding transmission link, which is a direct path divided by the target transmission path according to the node connection relationship. It can be seen that the joint CSI report adopts multi-level CSI, so that the channel state of each transmission link in the multi-hop path is clearly indicated, which is simple and efficient.

[0011] In a possible implementation, the first CSI report is CSI obtained according to a first function. It can be seen that the comprehensive channel state of the multi-hop path of the target transmission path is calculated by the first function, which is less information and efficient transmission.

[0012] In a possible implementation, the first function is a function defined according to multi-level CSI of the target transmission path, and the multi-level CSI corresponds to a plurality of transmission links divided by the target transmission path according to the node connection relationship. It can be seen that the comprehensive channel state of the multi-hop path of the target transmission path is calculated by the first function, which is less information and efficient transmission.

[0013] In a possible implementation, the target transmission path is a transmission path that meets a preset reporting condition. It can be seen that the preset reporting condition is used to constrain the CSI reporting trigger condition of the CSI reporting device, which can effectively limit the repeated invalid reporting of low-quality transmission paths and improve the efficiency of signaling transmission.

[0014] In a possible implementation, the preset reporting condition includes at least one of the following: the first CSI of the transmission path is greater than or equal to a first preset threshold value. It can be seen that reporting a transmission path with good enough CSI helps the source device to identify a corresponding path that can ensure reliable transmission for the to-be-transmitted data, thereby ensuring reliable data transmission and improving spectrum utilization.

[0015] The first CSI of the transmission path is less than or equal to a second preset threshold value. It can be seen that reporting a transmission path with insufficient CSI helps the source device to avoid using a corresponding path that cannot ensure reliable transmission for the to-be-transmitted data, thereby improving spectrum utilization.

[0016] In a possible implementation, the first CSI report is triggered by reporting in the following manner: reporting the first CSI report is triggered by a sidelink control information (SCI) indication field. It can be seen that the first device can trigger the device to report the first CSI report through the SCI indication field, so that the device reporting the first CSI report does not need to be configured with other special signaling, thereby improving the information indication efficiency.

[0017] In a possible implementation, the first CSI report is triggered to be reported by high-layer signaling configuration. Thus, the first device can trigger the device to report the first CSI report by high-layer signaling configuration, so that the device reporting the first CSI report can respond in real time based on base station scheduling, reduce the time delay, and improve the efficiency.

[0018] In a possible implementation, the first device acquires the first CSI report of the target transmission path, including that the first device receives the first CSI report of the target transmission path reported by a third device, the third device being a next-hop device of the first device in the target transmission path. Thus, the first CSI is reported by the next-hop device of the first device in the target transmission path, and the first CSI can contain multi-hop information in the target transmission path because the next-hop device can acquire the channel state information on multiple links connected to itself, so that the source device can acquire more comprehensive path state information, improve the transmission success rate and efficiency, and improve the spectrum utilization rate.

[0019] In a possible implementation, after the first device acquires the first CSI report of the target transmission path, the method further includes that the first device prioritizes the target transmission path according to the first CSI report. Thus, by classifying the transmission paths, the transmission data can be classified and controlled in a more refined manner, and the transmission path utilization rate and transmission stability can be improved.

[0020] In a second aspect, the embodiments of the present application provide a multi-hop path CSI reporting method, the multi-hop path including a first device, a second device, and a third device, the first device being a source device, and the second device being a target device; the method including:

[0021] The third device sends a first CSI report of a target transmission path to the first device, the third device being a next-hop device of the first device in the target transmission path, and the first CSI report being used to indicate the target transmission path.

[0022] By implementing the embodiments of the present application, the first device acquires the first CSI report of the target transmission path reported by the third device, and the first CSI report is used to indicate the target transmission path, so that the comprehensive channel state of the multi-hop path can be acquired at the data sending device, i.e., the source device, by reporting the first CSI.

[0023] In a possible implementation, the first CSI report is a joint CSI report, and the joint CSI report is used to indicate the joint channel state of the multi-hop transmission link of the target transmission path.

[0024] In a possible implementation, the first CSI report is multi-level CSI, and each level of CSI is used to represent a CSI indication of a corresponding transmission link, which is a direct path divided by the target transmission path according to a node connection relationship.

[0025] In a possible implementation, the first CSI report is CSI obtained according to a first function.

[0026] In a possible implementation, the first function is a function defined according to multi-level CSI of the target transmission path, and the multi-level CSI corresponds to multiple transmission links divided by the target transmission path according to a node connection relationship.

[0027] In a possible implementation, the target transmission path is a transmission path that satisfies a preset reporting condition.

[0028] In a possible implementation, the preset reporting condition includes at least one of the following:

[0029] The first CSI of the transmission path is greater than or equal to a first preset threshold value;

[0030] The first CSI of the transmission path is less than or equal to a second preset threshold value.

[0031] In a possible implementation, the first CSI report is triggered and reported in the following manner:

[0032] The first CSI report is triggered and reported by using a sidelink control information (SCI) indication field.

[0033] In a possible implementation, the first CSI report is triggered and reported in the following manner:

[0034] The first CSI report is triggered and reported by using high-layer signaling configuration.

[0035] In a third aspect, an embodiment of the present application provides a multi-hop path CSI reporting device applied to a first device, the multi-hop path including the first device, a second device, and a third device, the first device being a source device, and the second device being a target device; the device includes:

[0036] A transceiver unit, configured to obtain, by using the communication unit, a first CSI report of a target transmission path, the first CSI report being used to indicate a channel state of a multi-hop transmission link of the target transmission path.

[0037] In a fourth aspect, an embodiment of the present application provides a communication device, the terminal being a third device, comprising a memory, a transceiver and at least one processor, the memory storing instructions, the memory, the transceiver and the at least one processor being interconnected by a line, the processor being configured to invoke the instructions to perform the steps in any method of the first aspect or the second aspect.

[0038] In a fifth aspect, an embodiment of the present application provides a communication device, comprising a processor and an interface circuit;

[0039] The interface circuit is configured to receive code instructions and transmit the code instructions to the processor; and the processor executes the code instructions to perform the steps in any method of the first aspect or the second aspect.

[0040] In a sixth aspect, an embodiment of the present application provides a computer readable storage medium, the readable storage medium being configured to store instructions, when the instructions are executed, causing the steps in any method of the first aspect or the second aspect.

[0041] In a seventh aspect, an embodiment of the present application provides a computer program product, when the computer program product is executed on a communication device, performing the steps in any method of the first aspect or the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings needed to be used in the embodiments of the present application or the background art will be described below.

[0043] Figure 1 FIG. 1 is a system architecture diagram of a communication system provided by an embodiment of the present application;

[0044] Figure 2 FIG. 2 is a structural schematic diagram of a terminal device provided by an embodiment of the present application;

[0045] Figure 3 FIG. 3 is a structural schematic diagram of a network device provided by an embodiment of the present application;

[0046] Figure 4a FIG. 4 is a flow schematic diagram of a multi-hop path CSI reporting method provided by an embodiment of the present application;

[0047] Figure 4b FIG. 5 is an example diagram of node combination of a multi-hop path provided by an embodiment of the present application;

[0048] Figure 4c FIG. 6 is a schematic diagram of multiple transmission paths between a first device and a target device provided by an embodiment of the present application;

[0049] Figure 5is a functional unit block diagram of a multi-hop path CSI reporting device provided by an embodiment of the present application.

[0050] Figure 6 is a structural schematic diagram of a communication device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0051] The embodiments of the present application are described below with reference to the accompanying drawings.

[0052] Figure 1 is a structural schematic diagram of a communication system provided by an embodiment of the present application. The communication system 100 can be a fifth generation 5G mobile communication system, a sixth generation 6G mobile communication system, and any future communication system. The system can include at least one network device 101 (only one is shown) and one or more terminal devices 102 connected to the network device 101. The network device 101 can communicate wirelessly with the terminal device 102 through one or more antennas. Each network device 101 can provide communication coverage for a corresponding coverage area 104. The coverage area 104 corresponding to the network device 101 can be divided into multiple sectors, wherein each sector corresponds to a part of the coverage area (not shown).

[0053] In the embodiments of the present application, the network device 101 can include a base transceiver station, a wireless transceiver, a basic service set (BSS), an extended service set (ESS), a node B, an evolved node B (eNB or eNodeB), or a next-generation node B (gNB), etc. The communication system 100 can include several different types of network devices 101, such as macro base stations, micro base stations, etc. The network device 101 can also be a small station, a transmission reference point (TRP), etc. The network device 101 can apply different wireless technologies, such as cell radio access technology, or WLAN radio access technology.

[0054] In the embodiments of the present application, the terminal device 102 is a device with wireless transceiving function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on water surface (such as ships, etc.); and can also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiving function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present application do not limit the application scenarios. The terminal device can also be referred to as a user equipment (UE), a terminal, an access terminal, a UE unit, a UE station, a mobile device, a mobile station, a mobile station (mobile station), a mobile terminal, a mobile client, a mobile unit, a remote station, a remote terminal device, a remote unit, a wireless unit, a wireless communication device, a user agent or a user apparatus, etc.

[0055] It should be noted that the terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Multiple" means two or more, and therefore, "multiple" in the embodiments of the present application can also be understood as "at least two". "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / ", if not specially stated, generally represents an "or" relationship between the associated objects before and after it.

[0056] Reference Figure 2 , Figure 2 A terminal device provided by the embodiments of the present application is shown. As shown in Figure 2 The terminal device 200 can include an input / output module (including an audio input / output module 218, a key input module 216, a display 220, etc.), a user interface 202, one or more processors 204, a transmitter 206, a receiver 208, a coupler 210, an antenna 214 and a memory 212. These components can be connected by a bus or other means, Figure 2Take the connection through the bus as an example. Among them:

[0057] The antenna 214 can be used to convert electromagnetic energy into electromagnetic waves in free space, or convert electromagnetic waves in free space into electromagnetic energy in transmission line. The coupler 210 is used to divide the mobile communication signal received by the antenna 214 into multiple paths and distribute to multiple receivers 208.

[0058] The transmitter 206 can be used for transmitting the signal output by the processor 204.

[0059] The receiver 208 can be used for receiving the mobile communication signal received by the antenna 214.

[0060] In the embodiments of the present application, the transmitter 206 and the receiver 208 can be regarded as a wireless modem. In the terminal device 200, the number of the transmitter 206 and the receiver 208 can be one or more.

[0061] In addition to Figure 2 In addition to the transmitter 206 and the receiver 208 shown, the terminal device 200 can also include other communication components, such as GPS module, Bluetooth module, Wireless Fidelity (Wi-Fi) module, etc. In addition to the wireless communication signal described above, the terminal device 200 can also support other wireless communication signals, such as satellite signals, short wave signals, etc. In addition to wireless communication, the terminal device 200 can also be configured with a wired network interface (such as LAN interface) 201 to support wired communication.

[0062] The input and output module can be used to realize the interaction between the terminal device 200 and the user / external environment, which can mainly include audio input and output module 218, key input module 216 and display 220, etc. Specifically, the input and output module can also include camera, touch screen, sensor, etc. Among them, the input and output module communicates with the processor 204 through the user interface 202.

[0063] The memory 212 can be coupled to the processor 204 via a bus or input / output port, or the memory 212 can be integrated with the processor 204. The memory 212 is used to store various software programs and / or sets of instructions. Specifically, the memory 212 can include a high-speed random access memory, and can also include a non-volatile memory such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory 212 can store an operating system (hereinafter referred to as a system), such as an ANDROID, IOS, WINDOWS, or LINUX, etc. embedded operating system. The memory 212 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, and one or more network devices. The memory 212 can also store a user interface program that can display the content of an application program in a lifelike manner through a graphical operation interface, and receive a control operation of the application program by a user through input controls such as menus, dialog boxes, and buttons.

[0064] In the embodiments of the present application, the memory 212 can be used to store an implementation program of a channel state information (CSI) reporting method provided by one or more embodiments of the present application on a first device side. For implementation of the multi-hop path CSI reporting method provided by one or more embodiments of the present application, please refer to subsequent embodiments.

[0065] The processor 204 can be used to read and execute computer readable instructions. Specifically, the processor 204 can be used to call a program stored in the memory 212, such as an implementation program of a multi-hop path CSI reporting method provided by one or more embodiments of the present application on a first device side, and execute instructions contained in the program to implement the method involved in subsequent embodiments. The processor 204 can support one or more of the following: Global System for Mobile Communication (GSM) (2G) communication, Wideband Code Division Multiple Access (WCDMA) (3G) communication, Long Term Evolution (LTE) (4G) communication, and 5G communication, etc. Alternatively, when the processor 204 sends any message or data, it specifically sends the message or data by driving or controlling the transmitter 206.

[0066] Optionally, when the processor 204 receives any message or data, it specifically causes the reception by driving or controlling the receiver 208. Thus, the processor 204 can be regarded as a control center for performing the transmission or reception, and the transmitter 206 and the receiver 208 are specific executors of the transmission and reception operations.

[0067] It can be understood that the terminal device 200 can be Figure 1 The terminal device 102 shown in the communication system 100 can be implemented as a user equipment (UE), a terminal, an access terminal, a UE unit, a UE station, a mobile device, a mobile station, a mobile station, a mobile terminal, etc.

[0068] It should be noted that Figure 2 The terminal device 200 shown is only one implementation of the embodiments of the present application, and in actual applications, the terminal device 200 can also include more or fewer components, which are not limited here.

[0069] Reference Figure 3 , Figure 3 A network device provided by the embodiments of the present application is shown. As Figure 3 shown, the network device 300 can include one or more processors 301, a memory 302, a network interface 303, a transmitter 305, a receiver 306, a coupler 307, and an antenna 308. These components can be connected by a bus 304 or other means, Figure 3 Taking the bus connection as an example. Among them:

[0070] The network interface 303 can be used for the network device 300 to communicate with other communication devices, such as other network devices. Specifically, the network interface 303 can be a wired interface.

[0071] The transmitter 305 can be used for transmitting processing of signals output by the processor 301, such as signal modulation. The receiver 306 can be used for receiving processing of mobile communication signals received by the antenna 308, such as signal demodulation. In some embodiments of the present application, the transmitter 305 and the receiver 306 can be regarded as a wireless modem. In the network device 300, the number of transmitters 305 and receivers 306 can be one or more. The antenna 308 can be used to convert electromagnetic energy in the transmission line into electromagnetic waves in free space, or convert electromagnetic waves in free space into electromagnetic energy in the transmission line. The coupler 307 can be used to divide the mobile communication signal into multiple paths and distribute it to multiple receivers 306.

[0072] The memory 302 can be coupled to the processor 301 via a bus 304 or an input / output port, or integrated with the processor 301. The memory 302 is configured to store various software programs and / or sets of instructions. Specifically, the memory 302 can include a high-speed random access memory, and can also include a non-volatile memory such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory 302 can store an operating system (hereinafter referred to as a system), such as an embedded operating system uCOS, VxWorks, RTLinux, etc. The memory 302 can also store a network communication program, which can be used to communicate with one or more additional devices, one or more terminal devices, and one or more network devices.

[0073] The processor 301 can be configured to perform wireless channel management, implement call and communication link establishment and removal, and provide cell handover control for users in the control area, etc. Specifically, the processor 301 can include an administration module / communication module (AM / CM) (a center for voice and information exchange), a basic module (BM) (for call processing, signaling processing, wireless resource management, wireless link management, and circuit maintenance functions), a transcoder and submultiplexer (TCSM) (for multiplexing and demultiplexing and code conversion functions), etc.

[0074] In the embodiments of the present application, the processor 301 can be configured to read and execute computer-readable instructions. Specifically, the processor 301 can be configured to call a program stored in the memory 302, such as an implementation program of the multi-hop path CSI reporting method provided by one or more embodiments of the present application on the first device side, and execute the instructions contained in the program.

[0075] It can be understood that the network device 300 can be Figure 1 The network device 101 in the communication system 100 shown can 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, etc.

[0076] It should be noted that, Figure 3 The network device 300 shown is only one implementation of the embodiments of the present application, and in actual applications, the network device 300 can also include more or fewer components, which are not limited here.

[0077] It should be noted that in the embodiments of the present application, according to the relationship between the signal coverage range of the base station and the position of the terminal device, the terminal device 102 can be specifically divided into in coverage UE, in coverage edge UE, out of coverage edge UE and out of coverage UE. In the following embodiments, the first device can be the network device 101 or the terminal device 102, the relay device can be the network device 101 or the terminal device 102, and the target device can be the network device 101 or the terminal device 102.

[0078] Please refer to Figure 4a , Figure 4a is a flowchart of a multi-hop path CSI reporting method provided by the embodiments of the present application. The method can be implemented based on the communication system as shown in Figure 1 , 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. In other words, the first device forms at least one transmission path with the target device through one or more relay devices, and there is a path with N hops in the at least one transmission path, where N is an integer greater than or equal to 2.

[0079] In a possible example, the third device is a relay device, the first device can be a source device or a previous hop device of the relay device, and the second device can be a target device or a next hop device of the relay device.

[0080] The method includes but is not limited to the following steps:

[0081] Step S401: The first device acquires a first CSI report of a target transmission path, and the first CSI report is used to indicate the channel state of the multi-hop transmission link of the target transmission path.

[0082] As an embodiment, the multi-hop can be N hops, and N is greater than or equal to 2. That is, the at least one transmission path can include a two-hop path or a path with more than two hops.

[0083] The target transmission path is the multi-hop path, specifically the path between the source device and the target device. As an example, the path between the source device and the target device can be a one-hop or multi-hop transmission path from the source device to the target device, or a one-hop or multi-hop transmission path from any target relay device to the target device, or a one-hop or multi-hop transmission path from the next-hop device of the source device to the target device, or a one-hop or multi-hop transmission path from the next-hop device of any target relay device to the target device.

[0084] In addition, the first device and the second device can also form a direct connection path, that is, the data transmitted by the first device can be directly received by the second device. When the channel condition of the direct connection path is poor, the data reliability can be enhanced by transmission or data forwarding on other supplementary links.

[0085] In practical applications, any device can be designated as the source node. This application describes the first device as an example in detail.

[0086] The first CSI report is a joint CSI report, which is used to indicate the joint channel status of the multi-hop transmission links of the target transmission path.

[0087] The naming convention for the first CSI report can vary, such as using the target CSI report, and is not limited to a single one here.

[0088] Among them, such as Figure 4b The multi-hop path diagram shown indicates that any one of the at least one transmission path can include any of the following combinations of nodes: {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, target base station}.

[0089] Specifically, for the 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, and the target device corresponds to the target UE in the current combination. The relay UE can be any one of an in-coverage UE and an in-coverage edge UE, and the target UE can be any one of an in-coverage UE, an in-coverage edge UE, an out-of-coverage edge UE, and an out-of-coverage UE. According to the actual position distribution, it can be divided into multiple types, which will be described in detail below.

[0090] The first type is that the relay UE is an in-coverage UE, and the target device is an in-coverage edge UE at a distance L1 from the base station.

[0091] The second type is that the relay UE is an in-coverage UE, and the target device is an out-of-coverage edge UE at a distance L2 from the base station.

[0092] The third type is that the relay UE is an in-coverage UE, and the target device is an out-of-coverage UE at a distance L3 from the base station, L1 is less than L2, and L2 is less than L3.

[0093] The fourth type is that the relay UE is an in-coverage edge UE, and the target device is an out-of-coverage edge UE at a distance L2 from the base station.

[0094] The fifth type is that the relay UE is an in-coverage edge UE, and the target device is an out-of-coverage UE at a distance L3 from the base station.

[0095] For the combination {UE, relay UE, base station}, the first device corresponds to the UE in the current combination, the relay device corresponds to the relay UE in the current combination, and the target device corresponds to the base station in the current combination. The UE and the relay UE are both terminal devices, and according to the actual position distribution of the devices, multiple types of combinations can be formed, which will be described in detail below.

[0096] The first type is that the first device is an out-of-coverage UE, and the relay UE is an in-coverage edge UE.

[0097] The second type is that the first device is an out-of-coverage UE, and the relay UE is an in-coverage UE.

[0098] The third type is that the first device is an out-of-coverage edge UE, and the relay UE is an in-coverage edge UE.

[0099] The fourth type is that the first device is an out-of-coverage edge UE, and the relay UE is an in-coverage UE.

[0100] The fifth type is that the first device is an in-coverage edge UE, and the relay UE is an in-coverage edge UE.

[0101] The sixth type is that the first device is an in-coverage edge UE, and the relay UE is an in-coverage UE.

[0102] The seventh, the first device is an in-coverage UE, and the relay UE is an in-coverage UE.

[0103] For the 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, and 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, and a plurality of types of combinations can be formed according to the actual position distribution of the devices, which are not uniquely limited here.

[0104] For the combination {UE, one-hop relay UE,..., N-hop relay UE, target UE}, the first device corresponds to the UE in the current combination, the relay device corresponds to the one-hop relay UE in the current combination,..., the N-hop relay UE, and the target device corresponds to the target UE in the current combination. The UE, the one-hop relay UE,..., the N-hop relay UE, and the target UE are all terminal devices, and a plurality of types of combinations can be formed according to the actual position distribution of the devices, which are not uniquely limited here.

[0105] For the combination {base station, one-hop relay UE,..., N-hop relay UE, target UE}, the first device corresponds to the base station in the current combination, the relay device corresponds to the one-hop relay UE in the current combination,..., the N-hop relay UE, and the target device corresponds to the target UE in the current combination. The UE, the one-hop relay UE,..., the N-hop relay UE, and the target UE are all terminal devices, and a plurality of types of combinations can be formed according to the actual position distribution of the devices, which are not uniquely limited here.

[0106] In the above various combinations, the link between the terminal devices can be a sidelink, but is not limited to a sidelink application scenario, can be an unlicensed spectrum system, and can be an integrated access and backhaul link system. The sidelink is not limited to D2D, V2V, and V2X scenarios.

[0107] As can be seen, in the example, the first device obtains the first CSI report of the target transmission path, and since the first CSI report is used to indicate the target transmission path, the integrated channel state under the multi-hop path can be obtained at the data sending device, i.e., the source device, through the first CSI reporting.

[0108] In one possible example, the first CSI report is a multi-level CSI, and each level of CSI is used to represent the CSI indication of the corresponding transmission link, which is a directly connected path divided by the node connection relationship of the target transmission path. It can also be referred to as each level of CSI is used to represent the CSI indication of the corresponding transmission link, which is a directly connected path divided by the node connection relationship of the target transmission path.

[0109] For example, for a 2-hop path, the joint CSI report includes two levels of CSI, i.e., a first level of CSI is used to indicate the CSI indication between the first device and the relay device, and a second level of CSI is used to indicate the CSI indication between the relay device and the target device.

[0110] For example, the two levels of CSI can be represented as: {First hop CSI: X; Second hop CSI: Y;}, where the first hop is the first node and the second hop is the second node.

[0111] For example, the two levels of CSI can also be represented as: {1: X; 2: Y;}, i.e., the first hop CSI is represented or associated with index 1, and the second hop CSI is represented or associated with index 2.

[0112] For example, the two levels of CSI can also be represented as: {X, Y}, i.e., X and Y are sequentially sorted, and represent the first hop CSI and the second hop CSI, respectively.

[0113] For example, the two levels of CSI can also be represented as: a certain number of bits in the front of a CSI report are used for the first hop CSI, and a certain number of bits in the back are used for the second hop CSI; or a certain number of bits in the front of a CSI report are used for the second hop CSI, and a certain number of bits in the back are used for the first hop CSI; where the definition rule of the bit field can be pre-configured to either party of the terminal device or the network device, or signaled by the network device to the terminal device.

[0114] For example, the two levels of CSI can also be represented as: the first hop CSI is reported on a first resource, and the second hop CSI is reported on a second resource; where either the first resource or the second resource can be pre-configured to either party of the terminal device or the network device, or signaled by the network device to the terminal device. The first resource or the second resource can be any time domain, frequency domain, or spatial domain resource.

[0115] In a specific implementation, the format of the joint CSI report can be pre-configured or signaled.

[0116] As can be seen, in this example, the joint CSI report uses multiple levels of CSI, so that the channel state of each transmission link in the multi-hop path is clearly indicated, which is simple and efficient.

[0117] In one possible example, the first CSI report is a CSI obtained according to a first function.

[0118] The first function can also be referred to as a joint function or a function, and is not limited herein.

[0119] In a possible example, the first function is a function defined according to multi-level CSI of the target transmission path, and the multi-level CSI corresponds to a plurality of transmission links of the target transmission path divided according to a node connection relationship.

[0120] For example, for a 2-hop path, the joint function can be represented as Path_CSI=Func(SUE-CUE CSI, CUE-TUE CSI), where SUE-CUE CSI represents a channel state of a path from a source device to a relay device, and CUE-TUE CSI represents a channel state of a path from the relay device to a target device. In this example, the path from the source device to the relay device is a direct connection path, and the path from the relay device to the target device is a direct connection path.

[0121] The function Func(X, Y) can be any linear or nonlinear function with X and Y as parameters, for example, a function generated by corresponding weighting of X and Y. For example, Func(X, Y)=K1*X+K2*Y, where K1 and K2 are preset or configured by signaling.

[0122] It can be seen that in this example, the first function is used to calculate the comprehensive channel state of the multi-hop path of the target transmission path, which is less information and efficient in transmission.

[0123] In a possible example, the target transmission path is a transmission path that satisfies a preset reporting condition.

[0124] It can be seen that in this example, the preset reporting condition is used to restrict the CSI reporting trigger condition of the CSI reporting device, which can effectively limit the repeated invalid reporting of low-quality transmission paths and improve the signaling transmission efficiency.

[0125] In a possible example, the preset reporting condition includes that a first CSI of the transmission path is greater than or equal to a first preset threshold.

[0126] When the first CSI is a joint CSI of multi-level CSI, the first CSI being greater than or equal to the first preset threshold specifically means that a mean value of the multi-level CSI is greater than or equal to the first preset threshold, or that each CSI of the multi-level CSI is greater than or equal to the first preset threshold, or that M CSIs greater than or equal to a third preset threshold in the multi-level CSI are greater than or equal to the first preset threshold, and the present application is not limited herein. In the present application, greater than can be replaced by greater than or equal to, and less than can be replaced by less than or equal to.

[0127] When the first CSI is CSI obtained according to a first function, the first CSI being greater than or equal to the first preset threshold value specifically means that an output value of the first function, that is, a comprehensive CSI value, is greater than or equal to the first preset threshold value. For example, a linear weighted average value of the multi-level CSI is greater than the first preset threshold value, or a nonlinear weighted average value of the multi-level CSI is greater than the first preset threshold value.

[0128] In a specific implementation, the preset reporting condition can also be periodic reporting, wherein a reporting period can be preconfigured or configured by signaling.

[0129] It can be seen that reporting a transmission path with a good enough CSI helps the source device to identify a corresponding path that can ensure reliable transmission for the data to be transmitted, thereby ensuring reliable transmission of the data and improving spectrum utilization.

[0130] In a possible example, the preset reporting condition includes that the first CSI of the transmission path is less than or equal to a second preset threshold value.

[0131] When the first CSI is joint CSI of the multi-level CSI, the first CSI being less than or equal to the second preset threshold value specifically means that a mean value of the multi-level CSI is less than or equal to the second preset threshold value, or each CSI of the multi-level CSI is less than or equal to the second preset threshold value, or M CSIs greater than or equal to a third preset threshold value in the multi-level CSI are less than or equal to the second preset threshold value, which is not uniquely limited herein. In this application, greater than can be replaced by greater than or equal to, and less than can be replaced by less than or equal to.

[0132] When the first CSI is CSI obtained according to a first function, the first CSI being less than or equal to the second preset threshold value specifically means that an output value of the first function, that is, a comprehensive CSI value, is less than or equal to the second preset threshold value. For example, a linear weighted average value of the multi-level CSI is less than the second preset threshold value, or a nonlinear weighted average value of the multi-level CSI is less than the second preset threshold value.

[0133] The first preset threshold value and the second preset threshold value can be the same or different.

[0134] It can be seen that reporting a transmission path with a poor enough CSI helps the source device to avoid using a corresponding path that cannot ensure reliable transmission for the data to be transmitted, thereby improving spectrum utilization.

[0135] In this application, any threshold value can be preconfigured or configured by signaling.

[0136] The first CSI is reported periodically or non-periodically, which can be preconfigured or configured by signaling, wherein the non-periodic reporting can also be referred to as reporting by judging whether a triggering condition is met;

[0137] The first CSI is CSI reporting generated by multi-level CSI reporting or by a first function, which can be preconfigured or configured by signaling.

[0138] In this application, signaling configuration is configured by at least one of radio resource control (RRC) signaling, medium access control (MAC) signaling, or physical layer signaling. For example, signaling configuration is that the network device sends to the terminal device through the above signaling, or the source device sends to the relay device through the above signaling.

[0139] In one possible example, the first CSI report is triggered for reporting by triggering the first CSI report through a sidelink control information (SCI) indication field.

[0140] The SCI can be a one-level SCI or a certain level of SCI in multi-level SCI, such as a first level SCI or a second level SCI in two-level SCI. The multi-level SCI is a multiple stage SCI.

[0141] It can be seen that in this example, the first device can trigger the device to report the first CSI report through the SCI indication field, so that the device reporting the first CSI report does not need to be configured with other special signaling, improving the information indication efficiency.

[0142] In one possible example, the first CSI report is triggered for reporting by triggering the first CSI report through high layer signaling configuration.

[0143] It can be seen that in this example, the first device can trigger the device to report the first CSI report through high layer signaling configuration, so that the device reporting the first CSI report can respond in real time based on base station scheduling, reduce the latency, and improve the efficiency.

[0144] In one possible example, the first device obtains the first CSI report of the target transmission path, including that the first device receives the first CSI report of the target transmission path reported by a third device, and the third device is a next hop device of the first device in the target transmission path.

[0145] When the target transmission path is a 2-hop path, the relay device only includes the third device, and when the target transmission path is a path greater than 2 hops, the relay device includes the third device, a second relay device, etc.

[0146] In a specific implementation, when the first device is a base station, the third device can be an in-coverage UE of the base station or an in-coverage edge UE of the base station. The first device can send high-layer signaling to the third device to configure triggering of reporting of the first CSI report.

[0147] When the first device is an in-coverage UE, the third device can be any one of an in-coverage UE, an in-coverage edge UE, an out-of-coverage edge UE, and an out-of-coverage UE, which is determined according to a node combination of a target transmission path. The first device can trigger reporting of the first CSI report through an SCI indication field.

[0148] When the first device is an in-coverage edge UE, the third device can be any one of an in-coverage edge UE, an out-of-coverage edge UE, and an out-of-coverage UE, and the first device can trigger reporting of the first CSI report through an SCI indication field.

[0149] It can be seen that, in this example, the first CSI is reported by a next-hop device of the first device in a target transmission path. Since the next-hop device can obtain channel state information on multiple links connected to itself, the first CSI can contain multi-hop information in the target transmission path, so that the source device can obtain more comprehensive path state information, improve transmission success rate and efficiency, and improve spectrum utilization.

[0150] In addition, the device reporting the first CSI report can be a network device accessed by the first device in the target transmission path, in addition to the next-hop device of the first device in the target transmission path. That is, the network device can obtain CSI of each hop transmission link of the target transmission path and determine the first CSI comprehensively.

[0151] The SCI is an example of a sidelink. In an access and backhaul link scenario or another scenario, the SCI can be any downlink control information (DCI) and is not limited to the SCI.

[0152] In one possible example, after the first device obtains the first CSI report of the target transmission path, the method further includes: the first device prioritizes the target transmission path according to the first CSI report.

[0153] The transmission path with high priority is used to transmit a data packet of high-priority information, and the transmission path with low priority is used to transmit a data packet of low-priority information.

[0154] The first CSI report can specifically include a level of each transmission path, and a level division mechanism is not uniquely limited.

[0155] The first, the level division mechanism can divide the level according to the constraint interval formed by the first preset threshold value and the fourth preset threshold value. The level of the transmission path can be divided into three levels: high, medium and low. The fourth preset threshold value is greater than the first preset threshold value. The correspondence between the level and the threshold value range is shown in Table 1.

[0156] Table 1, correspondence between the level and the CSI threshold value

[0157] Rank of transmission path First CSI report High (S1) First CSI is greater than fourth preset threshold value Medium (S2) First CSI is less than fourth preset threshold value and greater than first preset threshold value Low (S3) First CSI is less than first preset threshold value

[0158] For example, as shown in Figure 4c , it is assumed that there are 6 transmission paths between the first device (illustrated as SUE) and the target device (illustrated as TUE), which are path P1 (the relay device is UE1), path P2 (the relay device is UE3), path P3 (the relay device is UE4), path P4 (the relay device is UE2), path P5 (the relay device is UE5), and path P6 (the relay device is UE6). For example, paths P1, P2 and P3 have good CSI and belong to high level S1; paths P4, P5 and P6 have medium CSI and belong to medium level S2.

[0159] Among them, the S1 level path contains the relay paths corresponding to the three relay UEs, which are UE1, UE3 and UE4. On this level path, UE1, UE3 and UE4 have good CSI with SUE and TUE, so the joint CSI is good. This level path can be used to transmit data packets of high priority, and is marked as S1 level path. The three relay UEs can transmit simultaneously or independently.

[0160] Specifically, when using the simultaneous transmission mechanism, UE1, UE3 and UE4 can use different combinations to transmit different data packets or the same data packet simultaneously. The specific combination types include {UE1, UE3}, {UE1, UE4}, {UE3, UE4}, {UE1, UE3, UE4}. The specific combination type can be determined according to one or more of the data amount of the data packet to be transmitted, the priority of the data packet, the device state of UE1, UE3 and UE4, and the occupation of the transmission path. For example, to transmit a high-priority data packet, three S1 level paths can be used to transmit simultaneously. This is not limited to be unique.

[0161] In the independent transmission mechanism, any one of the UEs 1, 3 and 4 can be used to transmit the current data packet to be transmitted to improve the resource utilization. The specific selection strategy can be determined according to one or more of the data amount of the data packet to be transmitted, the priority of the data packet, the device state of the UEs 1, 3 and 4, and the occupancy of the transmission path. For example, when a high-priority data packet is transmitted, any one of the three S1-level paths can be selected for transmission, which is not limited herein.

[0162] The S2 path includes three transit paths corresponding to three transit UEs, i.e., the UEs 2, 5 and 6. On the S2-level path, the UE 2 is far away from the SUE and the TUE, and the channel condition is poor, so the path belongs to the medium CSI and is marked as the S2-level path. The UE 5 is close to the SUE but far away from the TUE, and the path belongs to the medium CSI and is marked as the S2-level path. The UE 6 is far away from the SUE and the TUE, and the channel condition is poor, so the path belongs to the medium CSI and is marked as the S2-level path. Therefore, the above S2-level path can be used to transmit a data packet of low-priority information, which is marked as the path P2. The three transit UEs can be configured to transmit simultaneously or independently.

[0163] Specifically, in the simultaneous transmission mechanism, the UEs 2, 5 and 6 can use different combinations to simultaneously transmit the same data packet to improve the transmission success rate. The specific combination types include {UE2, UE5}, {UE2, UE6}, {UE5, UE6}, {UE2, UE5, UE6}, which can be determined according to one or more of the data amount of the data packet to be transmitted, the priority of the data packet, the device state of the UEs 2, 5 and 6, and the occupancy of the transmission path. For example, when a low-priority data packet is transmitted, the three S2-level paths can be simultaneously transmitted, which is not limited herein.

[0164] In the independent transmission mechanism, any one of the UEs 2, 5 and 6 can be used to transmit the current data packet to be transmitted to improve the resource utilization. The specific selection strategy can be determined according to one or more of the data amount of the data packet to be transmitted, the priority of the data packet, the device state of the UEs 2, 5 and 6, and the occupancy of the transmission path. For example, when a low-priority data packet is transmitted, any one of the three S2-level paths can be selected for transmission, which is not limited herein.

[0165] Secondly, the level division mechanism can also comprehensively evaluate the distance between the transit device and the first device, the distance between the transit device and the target device, etc.

[0166] It can be seen that in this example, by classifying the transmission paths, the transmission data can be classified and controlled more finely, and the utilization rate and stability of the transmission path can be improved.

[0167] It should be noted that the multi-hop path CSI reporting method disclosed in the embodiments of the present application can also be presented with the third device as the action subject, the multi-hop path including the first device, the second device and the third device, the first device being the source device, and the second device being the target device; the method includes:

[0168] The third device sends a first CSI report of a target transmission path to the first device, the third device being the next-hop device of the first device in the target transmission path, and the first CSI report being used to indicate the channel state of the multi-hop transmission link of the target transmission path.

[0169] By implementing the embodiments of the present application, the first device obtains the first CSI report of the target transmission path reported by the third device, and since the first CSI report is used to indicate the target transmission path, the comprehensive channel state under the multi-hop path can be obtained at the data sending device, i.e., the source device, through the first CSI report.

[0170] In one possible example, the first CSI report is a joint CSI report, and the joint CSI report is used to indicate the joint channel state of the multi-hop transmission link of the target transmission path.

[0171] In one possible example, the first CSI report is a multi-level CSI, and any level of CSI is used to represent the CSI indication of the corresponding transmission link, the transmission link being a direct connection path divided according to the node connection relationship of the target transmission path.

[0172] In one possible example, the first CSI report is a CSI obtained according to a first function.

[0173] In one possible example, the first function is a function defined according to the multi-level CSI of the target transmission path, the multi-level CSI corresponding to a plurality of transmission links divided according to the node connection relationship of the target transmission path.

[0174] In one possible example, the target transmission path is a transmission path satisfying a preset reporting condition.

[0175] In one possible example, the preset reporting condition includes at least one of the following:

[0176] The first CSI of the transmission path is greater than or equal to a first preset threshold value;

[0177] The first CSI of the transmission path is less than or equal to a second preset threshold value.

[0178] In one possible example, the first CSI report is triggered to be reported in the following manner:

[0179] The first CSI report is triggered to be reported through a sidelink control information (SCI) indication field.

[0180] In one possible example, the first CSI report is triggered to be reported in the following manner:

[0181] The first CSI report is triggered to be reported through high-layer signaling configuration.

[0182] Based on the same concept of the foregoing multi-hop path CSI reporting method, as shown in Figure 5 The embodiments of the present application also provide a multi-hop path CSI reporting apparatus 500, which comprises: a transceiver unit 501; and

[0183] The transceiver unit 501 is configured to acquire a CSI report of a target transmission path, and the first CSI report is used to indicate the target transmission path.

[0184] In one implementation, the first CSI report is a joint CSI report, and the joint CSI report is used to indicate a joint channel state of multi-hop transmission links of the target transmission path.

[0185] In another implementation, the first CSI report is a joint CSI report, and the joint CSI report is used to indicate a joint channel state of multi-hop transmission links of the target transmission path.

[0186] In another implementation, the first CSI report is a CSI obtained according to a first function.

[0187] In another implementation, the first function is a function defined according to multi-level CSI of the target transmission path, and the multi-level CSI corresponds to multiple transmission links of the target transmission path divided according to node connection relationships.

[0188] In another implementation, the target transmission path is a transmission path satisfying a preset reporting condition.

[0189] In another implementation, the preset reporting condition comprises at least one of the following:

[0190] The first CSI of the transmission path is greater than or equal to a first preset threshold value;

[0191] The first CSI of the transmission path is less than or equal to a second preset threshold value.

[0192] In yet another implementation, the first CSI report is triggered to be reported by:

[0193] triggering the first CSI report to be reported by a sidelink control information (SCI) indication field.

[0194] In yet another implementation, the first CSI report is triggered to be reported by:

[0195] triggering the first CSI report to be reported by high layer signaling.

[0196] In yet another implementation, the transceiver is specifically configured to receive the first CSI report of the target transmission path reported from a third device, the third device being a next-hop device of the first device in the target transmission path.

[0197] In yet another implementation, the transceiver is specifically configured to receive the first CSI report of the target transmission path reported from a third device, the third device being a next-hop device of the first device in the target transmission path.

[0198] The functions of the transceiver 501 described above can refer to the related description of the terminal device in the embodiment shown in Figure 2 , and thus will not be repeated here.

[0199] In the embodiments of the present application, the first device acquires the first CSI report of the target transmission path. Since the first CSI report is used to indicate the target transmission path, the comprehensive channel state under the multi-hop path can be acquired at the data sending device, i.e., the source device, through the first CSI report.

[0200] Please refer to Figure 6 , Figure 6A communication apparatus 600 provided by the embodiment of the present application is a first device, and the communication apparatus 600 comprises a processor 601, a memory 602 and a transceiver 603, which are connected with each other through a bus. The memory 602 comprises, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read only memory (EPROM), or a compact disc read-only memory (CD-ROM), and is used for storing relevant instructions and data. The transceiver 603 is used for receiving and sending data. The processor 601 can be one or more central processing units (CPUs), and in the case of the processor 701 being a CPU, the CPU can be a single-core CPU or a multi-core CPU. The processor 601 in the communication apparatus 600 is used for reading program codes stored in the memory 602 and performing the following operations:

[0201] obtaining a first CSI report of a target transmission path, the first CSI report being used for indicating the target transmission path.

[0202] It should be noted that the implementation of each operation can also correspond to the description of the corresponding method embodiment shown in Figure 2 .

[0203] The embodiment of the present application further provides a communication apparatus, comprising 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 runs the code instructions to perform part or all steps of any method described in the above method embodiments.

[0204] The embodiment of the present application further provides a computer storage medium, which is used for storing instructions, and when the instructions are executed, any method described in the above method embodiments is implemented.

[0205] The embodiment of the present application further provides a computer program product, which comprises a non-transitory computer readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform part or all steps of any method described in the above method embodiments. The computer program product can be a software installation package, and the computer comprises an electronic device.

[0206] Those skilled in the art can understand that all or part of the processes in the above-mentioned method embodiments can be implemented by a computer program instructing relevant hardware to complete, the program can be stored in a computer readable storage medium, and the program can include the processes of the above-mentioned method embodiments when executed. The aforementioned storage medium includes ROM or random storage memory RAM, magnetic disc or optical disc and various storage code medium.

Claims

1. A method for reporting Channel State Information (CSI) for multi-hop paths, characterized in that, The multi-hop path includes a first device, a second device, and a third device; the first device is a base station, the second device is a relay UE, and the third device is a target UE. The relay UE is a UE within the coverage area of ​​the base station or a UE at the edge of the base station's coverage area, and the target UE is a UE within the coverage area of ​​the base station. The method includes: The first device acquires a first CSI report of the target transmission path. The first CSI report indicates the channel status of the multi-hop transmission links of the target transmission path, where N hops are N, and N is greater than 2. The first CSI report is a multi-level CSI, where any level of CSI indicates the CSI of the corresponding transmission link. The transmission link is a directly connected path of the target transmission path divided according to node connection relationships. The target transmission path is a transmission path that meets preset reporting conditions. The preset reporting conditions include at least one of the following: The first CSI of the transmission path is greater than or equal to the first preset threshold value; The first CSI of the transmission path is less than or equal to the second preset threshold value; After the first device obtains the first CSI report of the target transmission path, the method further includes: The first device prioritizes the target transmission paths according to the first CSI report; wherein, high-priority transmission paths are used to transmit data packets of high-priority information, and low-priority transmission paths are used to transmit data packets of low-priority information; the high-priority path includes relay paths corresponding to 3 relay UEs. When transmitting high-priority data packets using the same transmission mechanism, multiple relay paths corresponding to the 3 relay UEs are selected to transmit the data packets based on one or more of the following: the data volume of the data packets to be transmitted, the priority of the data packets, the device status of the 3 relay UEs, and the occupancy status of the transmission paths; in the case of an independent transmission mechanism, one of the relay paths corresponding to the 3 relay UEs is selected to transmit the data packets based on one or more of the following: the data volume of the data packets to be transmitted, the priority of the data packets, the device status of the 3 relay UEs, and the occupancy status of the transmission paths.

2. The method according to claim 1, characterized in that, The first CSI report is a joint CSI report, which is used to indicate the joint channel status of the multi-hop transmission links of the target transmission path.

3. The method according to claim 1 or 2, characterized in that, The first CSI report is a CSI obtained according to the first function.

4. The method according to claim 3, characterized in that, The first function is a function defined according to the multi-level CSI of the target transmission path, wherein the multi-level CSI corresponds to multiple transmission links of the target transmission path divided according to the node connection relationship.

5. The method according to claim 4, characterized in that, The first CSI report was triggered to be submitted in the following manner: The first CSI report is triggered by the side link control information SCI indication field.

6. The method according to claim 4, characterized in that, The first CSI report was triggered to be submitted in the following manner: The first CSI report is triggered by high-level signaling configuration.

7. The method according to claim 4, characterized in that, The first device acquires a first CSI report of the target transmission path, including: The first device receives a first CSI report of the target transmission path from a third device, wherein the third device is the next-hop device of the first device in the target transmission path.

8. A multi-hop path CSI reporting device, characterized in that, Applied to a first device, the multi-hop path includes the first device, a second device, and a third device; the first device is a base station, the second device is a relay UE, and the third device is a target UE, wherein the relay UE is a UE within the coverage area of ​​the base station or a UE at the edge of the base station's coverage, and the target UE is a UE within the coverage area of ​​the base station; the device includes: The transceiver unit is configured to acquire a first CSI report of the target transmission path. The first CSI report indicates the channel status of the multi-hop transmission links of the target transmission path, where N hops are N, and N is greater than 2. The first CSI report is a multi-level CSI, where any level of CSI indicates the CSI of the corresponding transmission link. The transmission link is a directly connected path of the target transmission path divided according to node connection relationships. The target transmission path is a transmission path that meets preset reporting conditions. The preset reporting conditions include at least one of the following: The first CSI of the transmission path is greater than or equal to the first preset threshold value; The first CSI of the transmission path is less than or equal to the second preset threshold value; The apparatus further includes: a processing unit, configured to prioritize the target transmission paths according to the first CSI report; wherein, high-priority transmission paths are used to transmit data packets containing high-priority information, and low-priority transmission paths are used to transmit data packets containing low-priority information; the high-priority paths include relay paths corresponding to three relay UEs; when transmitting high-priority data packets using the same transmission mechanism, multiple transmission paths corresponding to the three relay UEs are selected to transmit data packets based on one or more of the following: the data volume of the data packets to be transmitted, the priority of the data packets, the device status of the three relay UEs, and the occupancy status of the transmission paths; in the case of an independent transmission mechanism, one of the relay paths corresponding to the three relay UEs is selected to transmit the data packets to be transmitted based on one or more of the following: the data volume of the data packets to be transmitted, the priority of the data packets, the device status of the three relay UEs, and the occupancy status of the transmission paths.

9. The apparatus according to claim 8, characterized in that, The first CSI report is a joint CSI report, which is used to indicate the joint channel status of the multi-hop transmission links of the target transmission path.

10. The apparatus according to claim 8 or 9, characterized in that, The first CSI report is a CSI obtained according to the first function.

11. The apparatus according to claim 10, characterized in that, The first function is a function defined according to the multi-level CSI of the target transmission path, wherein the multi-level CSI corresponds to multiple transmission links of the target transmission path divided according to the node connection relationship.

12. The apparatus according to claim 11, characterized in that, The first CSI report was triggered to be submitted in the following manner: The first CSI report is triggered by the side link control information SCI indication field.

13. The apparatus according to claim 11, characterized in that, The first CSI report was triggered to be submitted in the following manner: The first CSI report is triggered by high-level signaling configuration.

14. The apparatus according to claim 11, characterized in that, The transceiver unit is specifically used to receive a first CSI report of the target transmission path reported by a third device, wherein the third device is the next-hop device of the first device in the target transmission path.

15. A communication device, characterized in that, The communication device is a first device, including a memory, a transceiver, and at least one processor. The memory stores instructions, and the memory, the transceiver, and the at least one processor are interconnected via a line. The processor is used to invoke the instructions to perform the operation of sending uplink data in the method according to any one of claims 1-7.

16. A communication device, characterized in that, Includes processor and interface circuitry; The interface circuit is configured to receive code instructions and transmit them to the processor; the processor executes the code instructions to perform the method as described in any one of claims 1-7.

17. A readable storage medium, characterized in that, The readable storage medium is used to store instructions that, when executed, cause the method as described in any one of claims 1-7 to be implemented.

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