Side link SL measurement reporting and configuration method, terminal, equipment and medium

Abstract

The invention discloses a sidelink SL measurement reporting and configuration method, a terminal, equipment and a medium, and belongs to the field of communication, and the sidelink SL measurement reporting method of the embodiment of the invention comprises the following steps: the terminal executes SL measurement in a non-connection state; the terminal sends a first message to a first network device; wherein the first message comprises the first information or a first indication, the first indication is used for indicating that the terminal has the first information, and the first information comprises at least one of the following items: an effective SL measurement result; and the information of the valid candidate relay equipment is obtained. According to the embodiment of the invention, the time delay for establishing the relay link is shortened by optimizing the SL measurement behavior related to the UE.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a side link SL measurement reporting, configuration method, terminal, device and medium. Background Art

[0002] The relay technology in the wireless communication system is to add one or more relay nodes (e.g., Relay UE) between the base station and the terminal (e.g., Remote UE or Primary UE), which is responsible for forwarding the wireless signal once or multiple times. The Uu interface is between the relay node and the base station, and the SL (Sidelink) interface (e.g., PC5 interface) is between the relay node and the terminal.

[0003] The SL relay architecture in the related technology also includes a multiple path scenario, which means that the Remote UE establishes both an indirect path and a direct path. The indirect path refers to the wireless link established between the Remote UE (or Primary UE) and the base station through the Relay UE (or Secondary UE) and the Uu air interface of the Relay UE (or SecondaryUE); the direct path refers to the wireless link established between the Remote UE (or Primary UE) and the base station through its own Uu air interface.

[0004] In the related technology, during the process of establishing a relay link in a multipath scenario, the terminal (Remote UE) starts to perform SL relay measurement configuration, measurement and reporting when it is in the radio resource control connection state (RRC_CONNECTED), resulting in a large delay in the discovery of potential relay devices, which in turn leads to a long delay in establishing the relay link. Summary of the invention

[0005] The embodiments of the present application provide a SL measurement reporting, configuration method, terminal, device and medium, which can solve the problem of long delay in establishing a relay link.

[0006] In a first aspect, a side link SL measurement reporting method is provided, the method comprising:

[0007] The terminal performs SL measurement in a non-connected state;

[0008] The terminal sends a first message to the first network device;

[0009] The first message includes first information or a first indication, the first indication is used to indicate that the terminal has the first information, and the first information includes at least one of the following:

[0010] Valid SL measurement results;

[0011] Information about valid candidate relay devices.

[0012] In a second aspect, a side link SL measurement reporting method is provided, the method comprising:

[0013] The first network device receives a first message sent by the terminal;

[0014] The first message includes first information or a first indication, and the first indication is used to indicate that the terminal has the first information;

[0015] The first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device;

[0016] The valid SL measurement result is obtained by the terminal performing SL measurement in a non-connected state;

[0017] The information of the valid candidate relay device is obtained by the terminal performing SL measurement in a non-connected state.

[0018] In a third aspect, a side link SL measurement configuration method is provided, the method comprising:

[0019] The second network device sends SL measurement configuration information to the terminal;

[0020] The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message;

[0021] The SL measurement configuration information is used by the terminal to perform the SL measurement in a non-connected state.

[0022] In a fourth aspect, a terminal is provided, including:

[0023] A measurement module, used for performing SL measurement in a non-connected state;

[0024] A first sending module, configured to send a first message to a first network device;

[0025] The first message includes first information or a first indication, the first indication is used to indicate that the terminal has the first information, and the first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device.

[0026] According to a fifth aspect, a first network device is provided, including:

[0027] A first receiving module, used to receive a first message sent by a terminal;

[0028] The first message includes first information or a first indication, and the first indication is used to indicate that the terminal has the first information;

[0029] The first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device;

[0030] The valid SL measurement result is obtained by the terminal performing SL measurement in a non-connected state;

[0031] The information of the valid candidate relay device is obtained by the terminal performing SL measurement in a non-connected state.

[0032] In a sixth aspect, a second network device is provided, including:

[0033] A second sending module, configured for the second network device to send SL measurement configuration information to the terminal;

[0034] The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message;

[0035] The SL measurement configuration information is used by the terminal to perform the SL measurement in a non-connected state.

[0036] In a seventh aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0037] In an eighth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is used to perform SL measurement in a non-connected state; the communication interface is used for the terminal to send a first message to a first network device;

[0038] The first message includes first information or a first indication, the first indication is used to indicate that the terminal has the first information, and the first information includes at least one of the following:

[0039] Valid SL measurement results;

[0040] Information about valid candidate relay devices.

[0041] In the ninth aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the second aspect are implemented, or when the program or instruction is executed by the processor, the steps of the method described in the third aspect are implemented.

[0042] In a tenth aspect, a network side device is provided, comprising a communication interface, wherein the communication interface is used to receive a first message sent by a terminal;

[0043] The first message includes first information or a first indication, and the first indication is used to indicate that the terminal has the first information;

[0044] The first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device;

[0045] The valid SL measurement result is obtained by the terminal performing SL measurement in a non-connected state;

[0046] The information of the valid candidate relay device is obtained by the terminal performing SL measurement in a non-connected state.

[0047] In an eleventh aspect, a network side device is provided, comprising a communication interface, wherein the communication interface is used to send SL measurement configuration information to a terminal;

[0048] The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message;

[0049] The SL measurement configuration information is used by the terminal to perform the SL measurement in a non-connected state.

[0050] In the twelfth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented, or the steps of the method described in the third aspect are implemented.

[0051] In a thirteenth aspect, a wireless communication system is provided, including: a terminal and a first network device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the first network side device can be used to execute the steps of the methods described in the second aspect and the third aspect;

[0052] Alternatively, a wireless communication system includes: a terminal, a first network device and a second network device, wherein the terminal can be used to execute the steps of the method described in the first aspect, the first network side device can be used to execute the steps of the method described in the second aspect, and the second network side device can be used to execute the steps of the method described in the third aspect.

[0053] In the fourteenth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the method as described in the first aspect, or the method as described in the second aspect, or the method as described in the third aspect.

[0054] In the fifteenth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the SL measurement reporting method as described in the first aspect, or the program / program product is executed by at least one processor to implement the steps of the SL measurement reporting method as described in the second aspect, or the program / program product is executed by at least one processor to implement the steps of the SL measurement configuration method as described in the third aspect.

[0055] In an embodiment of the present application, the terminal performs SL measurement in a non-connected state; the terminal sends a first message to a first network device; wherein the first message includes the first information or a first indication, the first indication is used to indicate that the terminal has the first information, and the first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device. In an embodiment of the present application, by optimizing the UE-related SL measurement behavior, the terminal can perform SL measurement in advance in a non-connected state, and can then quickly provide measurement-related information during the relay link establishment process, thereby effectively shortening the delay in establishing the relay link. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 is a block diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0057] Figure 2 is a block diagram of another wireless communication system to which the embodiments of the present application can be applied;

[0058] Figure 3 is a block diagram of another wireless communication system to which the embodiments of the present application can be applied;

[0059] Figure 4 It is a flowchart of a multi-path establishment based on SL relay architecture in the related art;

[0060] Figure 5It is a flow chart of a side link SL measurement reporting method provided by an embodiment of the present application;

[0061] Figure 6 It is a flowchart of multi-path establishment of an SL relay architecture provided by an embodiment of the present application;

[0062] Figure 7 is a flowchart of multi-path establishment of another SL relay architecture provided by an embodiment of the present application;

[0063] Figure 8 It is a flowchart of another side link SL measurement reporting method provided in an embodiment of the present application;

[0064] Fig. 9 It is a flowchart of a side link SL measurement configuration method provided by an embodiment of the present application;

[0065] Fig.10 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0066] Fig.11 is a schematic diagram of a terminal provided in an embodiment of the present application;

[0067] Fig.12 It is a schematic diagram of a network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0069] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0070] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0071] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0072] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AP) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B, a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0073] For ease of understanding, some contents involved in the embodiments of the present application are described below:

[0074] Relay technology in wireless communication systems is to add one or more relay nodes between the base station and the terminal, which is responsible for forwarding the wireless signal once or multiple times, that is, the wireless signal needs to go through multiple hops to reach the terminal. Wireless relay technology can not only be used to expand cell coverage and fill in cell coverage blind spots, but also to increase cell capacity through spatial resource reuse. For indoor coverage, Relay technology can also overcome penetration loss and improve indoor coverage quality.

[0075] Taking the simpler two-hop relay as an example, wireless relay splits a base station-terminal link into two links: base station-relay station and relay station-terminal. This provides the opportunity to replace a link with poor quality with two links with better quality to obtain higher link capacity and better coverage.

[0076] Currently, the relay supported in LTE (Long Term Evolution) is U2N relay (UE-to-Network relay), that is, one end of the relay is connected to the UE, and the other end is connected to the network side. The UE connected to the relay can be called remote UE.

[0077] NR will also study how to support the UE-to-Network Relay mechanism. Typical scenarios include Figure 2 As shown, the relay UE is used as a relay station for example. In a typical UE-to-Network scenario, the Remote UE needs to transmit data with the network side, but due to poor coverage, the Relay UE is found as a relay. The Uu interface is between the Relay UE and the base station, and the sidelink (PC5) interface is between the Relay UE and the Remote UE. Generally speaking, the Relay UE is open and can serve any Remote UE.

[0078] For SL relay architecture, in addition to Figure 2 The typical scenarios shown in FIG. 1 also include multi-path scenarios, such as Figure 3 As shown, it means that the Remote UE has established both an indirect path and a direct path. The indirect path refers to the wireless link established between the Remote UE (or Primary UE) and the base station through the Relay UE (or Secondary UE) and the Uu air interface of the Relay UE (or Secondary UE); the direct path refers to the wireless link established between the Remote UE (or Primary UE) and the base station through its own Uu air interface. It should be noted that Figure 3 CP refers to the control plane, and UP refers to the user plane. Figure 3 The three multipath scenarios are shown for illustration only. Figure 3 Three methods are shown.

[0079] In addition, it should be noted that the connection between the two UEs does not necessarily have to be a PC5 interface. The interface between them can also be a wired connection or an ideal inter-UE connection. In this case, multipath can refer to the Primary UE (with Figure 3 The remote UE role in the UE is equivalent to that in the UE that establishes both the indirect path and the direct path.

[0080] In the related art, the multi-path establishment process can refer to Figure 4 .

[0081] in Figure 4Part (a) of FIG. 1 involves the multipath establishment process of the remote UE in the RRC (Radio Resource Control) idle state (RRC_IDLE):

[0082] Step 0. Remote UE is in RRC_IDLE state;

[0083] Step 1. The Remote UE sends an RRC connection establishment request (RRCSetupRequest) message to the base station through the Uu air interface;

[0084] Step 2. The base station replies an RRC connection establishment (RRCSetup) message to the Remote UE via the Uu air interface;

[0085] Step 3. The Remote UE sends an RRC connection establishment completion (RRCSetupComplete) message to the base station via the Uu air interface;

[0086] According to steps 1-3, the Remote UE completes the establishment of the direct connection path;

[0087] Step 4. The base station sends a security mode command (SecurityModeCommand) message to the Remote UE through the Uu air interface;

[0088] Step 5. The Remote UE replies a Security Mode Complete message to the base station via the Uu air interface;

[0089] Step 6. The base station sends a SL measurement configuration to the Remote UE through the Uu air interface. The Remote UE performs measurement according to the SL measurement configuration and sends a SL measurement result to the base station, wherein the SL measurement result includes at least one candidate relay UE.

[0090] Step 7. The base station sends an RRC reconfiguration message to the Remote UE via the Uu air interface; the RRC Reconfiguration message indicates that a non-direct connection path is established through a certain relay UE;

[0091] Step 8a. The Remote UE sends an RRC Reconfiguration Complete message to the base station via the Uu air interface;

[0092] Step 8b. Optionally, the Remote UE also sends an RRC reconfiguration complete (RRCReconfigurationComplete) message to the base station through the Relay UE, for example, when the Remote UE is configured with split signaling radio bearer 1 (splitSRB1) and the split SRB1 activates the PDCP duplication function (split SRB1 with duplication enabled);

[0093] According to steps 4-8, the Remote UE completes the establishment of the indirect path.

[0094] in Figure 4 Part (b) of FIG. 1 involves the multipath establishment process of the remote UE in the RRC inactive state (RRC_INACTIVE):

[0095] Step 0. The Remote UE is in RRC_INACTIVE state;

[0096] Step 1. The Remote UE sends an RRC connection resumption request (RRCResumeRequest) message to the base station through the Uu air interface;

[0097] Step 2. The base station replies an RRC connection recovery (RRCResume) message to the Remote UE via the Uu air interface;

[0098] Step 3. The Remote UE sends an RRC connection recovery complete (RRCResumeComplete) message to the base station via the Uu air interface;

[0099] According to steps 1-3, the Remote UE completes the establishment of the direct connection path. It should be noted that for the Remote UE in the RRC_INACTIVE state, the security activation process between it and the base station is completed in the RRC Resume process of steps 1-3, so it can be omitted to execute similar Figure 4 Steps 4-5 of part (a);

[0100] Step 4. The base station sends the SL measurement configuration to the Remote UE via the Uu air interface, and the Remote UE performs measurement according to the SL measurement configuration and sends the SL measurement result to the base station. The SL measurement result includes at least one candidate relay UE;

[0101] Step 5. The base station sends an RRC reconfiguration message to the Remote UE via the Uu air interface. The RRC reconfiguration message indicates to establish a non-direct path through a certain relay UE;

[0102] Step 6a. The Remote UE sends an RRC Reconfiguration Complete message to the base station via the Uu air interface;

[0103] Step 6b. Optionally, the Remote UE also sends an RRC Reconfiguration Complete message to the base station through the Relay UE, for example, when the Remote UE is configured with split SRB1 with duplication enabled;

[0104] According to steps 4-6, the Remote UE completes the establishment of the indirect path.

[0105] The multipath relay establishment scheme in the related art is that the terminal (Remote UE) starts to perform SL relay measurement configuration, measurement and reporting in the radio resource control connection state (RRC_CONNECTED), resulting in a large delay in the discovery of potential relay devices, which in turn leads to a long delay in the establishment of the relay link. The scheme provided in this application shortens the delay in establishing the relay link by optimizing the measurement behavior related to the UE (remote UE).

[0106] The SL measurement reporting method and related equipment provided in the embodiments of the present application are described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0107] See also Figure 5 , Figure 5 is a flow chart of a side link SL measurement reporting method provided in an embodiment of the present application, which is used for a terminal, such as Figure 5 As shown, the method comprises the following steps:

[0108] Step 501: The terminal performs SL measurement in a non-connected state.

[0109] In the embodiment of the present application, the non-connected state includes an idle state (RRC_IDLE) or an inactive state (RRC_INACTIVE).

[0110] Compared with the related art, the terminal starts to perform SLrelay measurement in the radio resource control connected state (RRC_CONNECTED). In the embodiment of the present application, the measurement is performed in advance in a non-connected state, for example, the RRC idle state (RRC_IDLE) or the RRC inactive state (RRC_INACTIVE), so as to obtain the measurement results that meet the preset conditions as soon as possible, and the auxiliary network can configure the target relay link after the terminal enters the connected state, thereby reducing the delay in establishing multiple paths.

[0111] Optionally, before the terminal performs the side link SL measurement in the unconnected state, the method further includes:

[0112] The terminal receives SL measurement configuration information sent by the second network device;

[0113] The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message;

[0114] The SL measurement configuration information is used by the terminal to perform the side link SL measurement in a non-connected state.

[0115] In the embodiment of the present application, corresponding to the terminal performing SL measurement in a non-connected state, SL measurement configuration information for performing the side link SL measurement can be further obtained in advance, and in an optional solution, the SL measurement configuration information can be obtained from the second network device. It can be understood that the embodiment of the present invention is not limited to this method, and the SL measurement configuration information can also be determined by using preset SL measurement configuration information and other methods.

[0116] The second network device that provides the SL measurement configuration information and the first network device for which the terminal performs measurement reporting (see step 502) may be the same network device or different network devices. This is because the corresponding service node may or may not have changed when the terminal receives the SL measurement configuration information and performs measurement reporting.

[0117] Optionally, the SL measurement configuration information includes at least one of the following: a frequency of SL measurement, a SL measurement amount, and a SL measurement reporting threshold.

[0118] In an embodiment of the present application, the Remote UE obtains SL measurement configuration information in the RRC_IDLE state or RRC_INACTIVE according to at least one of the system messages (eg, SIB12) and the RRCRelease message: including at least one of the SL measurement frequency list, the SL measurement amount, and the SL measurement reporting threshold.

[0119] Among them, the above-mentioned SL measurement quantity can be at least one of the reference signal received power SL-RSRP (Sidelink-Reference Signal Received Power) of the side link and the reference signal received power SD-RSRP (Sidelink Discovery-Reference Signal Received Power) of the side link discovery message, or it can be other parameters used to monitor the link quality of the side link. SL-RSRP and SD-RSRP both measure the DMRS (Demodulation Reference Signal) reference information of PSSCH (Physical sidelink shared channel). The difference between the two lies in the different content carried on PSSCH for transmission. SD-RSRP is for the case of transmitting side link discovery (SL discovery) messages, and SL-RSRP is for the case of SLcommunication service data.

[0120] Optionally, an embodiment of the present invention may be that when the UE is in the RRC_CONNECTED state and receives an RRC connection release (RRCRelease) message from the serving base station to enter the RRC_IDLE state, the SL measurement configuration information in the RRC_IDLE state is obtained according to at least one of the system message (e.g., SIB12) and the RRCRelease message; or, when the UE is in the RRC_CONNECTED state and receives an RRC connection release (RRCRelease withsuspendconfig) message carrying a suspend configuration from the serving base station to enter the RRC_INACTIVE state, the SL measurement configuration information under RRC_INACTIVE is obtained according to at least one of the system message (e.g., SIB12) and the RRCRelease message.

[0121] In an embodiment of the present application, the above-mentioned SL measurement configuration information is sent through at least one of a system message and an RRC connection release message. The frequency of SL measurement preferably follows the RRCRelease configuration. For example, if RRCRelease does not configure the frequency list of SL measurement, it follows the system message (serving cell SIB) configuration to execute. If the RRCRelease message configures the frequency of SL measurement, the measurement is performed at the frequency of SL measurement configured by the RRCRelease message. In other words, if both the system message and the RRCRelease message configure the frequency of SL measurement, the measurement is performed at the frequency of SL measurement configured by the RRCRelease message. The execution logic of other types of SL measurement configuration information is similar.

[0122] Optionally, the terminal performs SL measurement, including:

[0123] In a case where both the system message and the RRC connection release message received by the terminal include SL measurement configuration information of a target type, side link SL measurement information is performed according to the measurement configuration information corresponding to the SL measurement configuration information of the target type in the RRC connection release message.

[0124] The target type of SL measurement configuration information is any type of SL measurement configuration information.

[0125] Optionally, the SL measurement configuration information in the RRC connection release message further includes at least one item of the following information: a valid area for SL measurement, a valid object for SL measurement, and a valid duration for SL measurement.

[0126] In an embodiment of the present application, the above SL measurement configuration information is sent via an RRC connection release message. RRCRelease can configure at least one of the SL measurement frequency, SL measurement amount, and SL measurement reporting threshold, and may also include: at least one of the valid area of ​​SL measurement (e.g., Cell ID list), the valid object of SL measurement (e.g., Relay UE ID list), and the valid duration of SL measurement.

[0127] Among them, the valid area of ​​SL measurement can be a cell list, that is, when the serving cell is one of the cells in the cell list, the above-mentioned SL measurement configuration information (such as the frequency of SL measurement, SL measurement amount, at least one of the SL measurement reporting threshold) is valid; the valid object of SL measurement can be a relay device list (specified relay device), that is, when the measurement object is a relay device (specified relay device) in the relay device list, the above-mentioned SL measurement configuration information (such as the frequency of SL measurement, SL measurement amount, at least one of the SL measurement reporting threshold) is valid; the effective duration of SL measurement controls the duration of SL measurement in advance when the following judgment conditions are met: the RRC connection release message is received, the RRC connection release message includes the effective duration of SL measurement, and the timer corresponding to the effective duration of SL measurement is started or restarted; or it can also be understood that the timer corresponding to the effective duration of SL measurement can be started when the following judgment conditions are met: the RRC connection release message is received, and the RRC connection release message includes the effective duration of SL measurement.

[0128] Optionally, in an embodiment of the present application, by configuring the effective area of ​​SL measurement, it can be used for cell reselection. For example, the terminal can only select the cell corresponding to the effective area of ​​SL measurement when reselecting the cell, or the terminal can give priority to selecting the cell corresponding to the effective area of ​​SL measurement when reselecting the cell.

[0129] Optionally, when the SL measurement configuration information includes a frequency point for SL measurement, the terminal performs side link SL measurement, including:

[0130] The terminal indicates to an upper layer of the terminal that a SL discovery process is triggered;

[0131] The terminal performs SL measurement on the candidate relay devices determined by the SL discovery process.

[0132] The terminal instructs the upper layer of the terminal to trigger the SL discovery process, which may specifically include: the terminal provides the upper layer of the terminal with the frequency point information of the SL measurement in a non-connected state;

[0133] The upper layer of the terminal triggers the SL discovery process in response to the above-mentioned SL frequency information.

[0134] In the embodiment of the present application, when the Remote UE is released to the RRC_IDLE or RRC_INACTIVE state, the following operations are performed:

[0135] Providing SL frequency information to the upper layer of the UE according to the frequency measured by the SL, so that the upper layer triggers the SL discovery process, which is used to discover candidate relay devices;

[0136] Initiate SL measurement on the candidate relay device according to the SL measurement frequency point;

[0137] Optionally, a SL measurement timer is started according to the effective duration of the SL measurement, and the SL measurement timer enables the SL measurement to be performed within the effective duration after the start (ie, the effective duration of the SL measurement).

[0138] Optionally, the method further includes: the terminal suspending or stopping SL measurement when a second preset condition is met;

[0139] The second preset condition includes at least one of the following:

[0140] The timer corresponding to the effective duration of the SL measurement times out;

[0141] The candidate relay device determined in the SL discovery process is not a valid object for SL measurement;

[0142] The cell reselected by the terminal does not support layer 2 U2N relay;

[0143] The cell reselected by the terminal does not support multipath relay;

[0144] The cell reselected by the terminal does not support SL measurement in a non-connected state.

[0145] In the embodiment of the present application, the condition for the UE to suspend or stop measurement includes but is not limited to at least one of the following:

[0146] The effective duration of SL measurement, timer, times out, and the measurement stops;

[0147] The SL discovery process is used to discover candidate relay devices that are not valid objects for SL measurement, so the UE may not measure;

[0148] If the current serving cell of the UE does not support L2 U2N (UE to Network) relay (which can be determined by the indication sl-L2U2N-Relay-r17 in the related technology) or does not support multi-path relay or does not support SL measurement in a non-connected state (which can also be understood as not supporting fast multi-path measurement configuration fast multi-path setup). Whether multi-path relay is supported and whether SL measurement in a non-connected state is supported can be indicated by corresponding indication information.

[0149] Step 502: The terminal sends a first message to a first network device;

[0150] The first message includes first information or a first indication, where the first indication is used to indicate that the terminal has the first information;

[0151] The first information includes at least one of the following: a valid SL measurement result; and information of a valid candidate relay device.

[0152] Optionally, the SL measurement result includes at least one of the following: a side link discovery message reference signal received power SD-RSRP measurement result, a side link reference signal received power SL-RSRP measurement result, a relay device identifier, and a relay device service cell identifier.

[0153] In the embodiment of the present application, the SL measurement performed in step 501 can obtain information such as SD-RSRP measurement results, SL-RSRP measurement results, relay device identification, relay device serving cell identification, etc. When the above information meets the preset requirements (first preset conditions), a first message can be sent to the first network device.

[0154] Optionally, the terminal sending a first message to the first network device includes:

[0155] The terminal sends a first message to the first network device when a first preset condition is met;

[0156] The first preset condition includes at least one of the following:

[0157] The terminal has first information;

[0158] The service node of the terminal supports layer 2 U2N relay;

[0159] The service node of the terminal supports multi-path relay;

[0160] The service node of the terminal supports SL measurement in a non-connected state.

[0161] The above-mentioned preset condition at least includes the existence of first information of the terminal, and the first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device. That is, when the terminal finds a valid SL measurement result and information of a valid candidate relay device through SL measurement, a first message is sent to the first network device.

[0162] The above-mentioned valid SL measurement results can be understood as measurement results that meet the relay link requirements, and the above-mentioned valid candidate relay devices can be understood as relay devices that meet the relay link requirements (or relay devices that meet the relay criteria).

[0163] Optionally, the valid SL measurement result includes at least one of the following: a SL measurement result greater than or equal to a first preset threshold, a SL measurement result that conforms to a valid area; a SL measurement result that conforms to a valid object;

[0164] Optionally, the valid candidate relay device satisfies at least one of the following conditions:

[0165] A relay device whose SL link quality with the terminal is greater than or equal to a second preset threshold;

[0166] The same relay device as the serving base station of the terminal;

[0167] Relay equipment that is the same as or equivalent to the public land mobile network PLMN serving the terminal;

[0168] A relay device whose Uu link quality with a serving base station is greater than or equal to a third preset threshold;

[0169] Relay equipment that meets the valid targets of SL measurement.

[0170] The first preset threshold may be a SL measurement reporting threshold, and a SL measurement result that is greater than or equal to the first preset threshold is a SL measurement result that satisfies the SL measurement reporting threshold.

[0171] Optionally, the SL link quality between the relay device and the terminal may be judged by the value of SL-RSRP or SD-RSRP, and correspondingly, the second preset threshold may be set to a preset SL-RSRP or SD-RSRP value.

[0172] Optionally, the Uu link quality between the relay device and the serving base station may be judged by the value of Uu RSRP, and correspondingly, the third preset threshold may be set to a preset Uu RSRP value.

[0173] It is understandable that the embodiments of the present application do not limit the above-mentioned link quality judgment parameters, and the above-mentioned RSRP value is only used for judgment examples.

[0174] In an embodiment of the present application, when the information obtained by performing SL measurement meets the first preset condition, a first message can be sent to the first network device, where sending the first message can be sending the first information, that is, directly sending the information (first information) that meets the first preset condition to the first network device, or sending a first indication (available indication), that is, informing the first network device through the first indication that the SL measurement of the terminal has obtained at least one of a valid SL measurement result and information of a valid candidate relay device.

[0175] Optionally, the first preset condition includes any one of the following:

[0176] The service node of the terminal supports layer 2 U2N relay;

[0177] The service node indicates that multi-path relay is supported;

[0178] The serving node indicates support for SL measurement in a non-connected state.

[0179] In the embodiment of the present application, whether to send the first message to the first network device can also be determined by judging the current service node of the terminal. For example, the first message is sent to the first network device only when the service node indicates support for layer 2 U2N relay (UE to Network Relay), supports multipath relay, or the service node indicates support for SL measurement in a non-connected state. Among them, whether the service node supports layer 2 U2N relay can be determined by relying on the indication sl-L2U2N-Relay-r17 in the relevant technology; whether the service node is multipath relay, or whether it supports SL measurement in a non-connected state, can be indicated by the (newly set) corresponding indication information.

[0180] Optionally, the terminal sending a first message to the first network device includes:

[0181] The terminal sends a first message to the first network device during the execution of the RRC connection establishment process; the first message includes the first indication;

[0182] Alternatively, the terminal sends a first message to the first network device during the execution of the RRC connection recovery process; the first message includes the first information or the first indication;

[0183] Alternatively, the terminal sends a first message to a first network device in a connected state, where the first message includes the first information or the first indication.

[0184] The implementation method of the present application further limits the timing of sending the first message. One type of optional implementation method is to execute the first message under the RRC connection establishment process or the RRC connection recovery process, that is, to execute the sending of the first message before the terminal enters the connected state, which can further improve the efficiency of establishing the relay link. Another type of optional implementation method is to execute the sending of the first message in the connected state (RRC_CONNECTED).

[0185] Optionally, the first message includes first information, and before the terminal sends the first message to the first network device, the method further includes:

[0186] receiving a first request message sent by the first network device; the first request message including a second indication for requesting to report the first information;

[0187] Wherein, when a first preset condition is met, the terminal sends a first message to the first network device, including:

[0188] When a first preset condition is met, the terminal sends a first message to the first network device in response to the first request message.

[0189] In an implementation manner of the present application, optionally, the sending of the above-mentioned first message is executed based on a request from the network side (first request message), that is, after receiving the request message (first request message), the terminal provides the above-mentioned usable measurement information (first information) to the first network device through a first message.

[0190] Optionally, the first message includes the first information, and when the terminal executes the RRC connection recovery process and sends the first message to the first network device, the first request message is carried by a radio resource control RRC connection recovery message; or, the first message is carried by an RRC connection recovery completion message. Further reducing the process delay of the side link SL measurement reporting.

[0191] Optionally, the first message includes the first information. When the terminal is in a connected state, the first network device sends a first message to the first network device. The first network device sends a security mode command and a first request message at the same time. The terminal feeds back a security mode completion message and the first message at the same time, thereby further reducing the process delay of the side link SL measurement reporting.

[0192] Optionally, the first message includes a first indication, and after the terminal sends the first message to the first network device, the method further includes:

[0193] The terminal receives a second request message sent by the first network device, where the second request message includes a third indication for requesting to report the first information;

[0194] In response to the second request message, the terminal sends a second message to the first network device;

[0195] The second message includes the first information.

[0196] In an implementation manner of the present application, optionally, after the first network device receives the first indication, that is, the first network device knows that the terminal has usable measurement information (first information), the first network device sends a request message (second request message) to the terminal to obtain the above-mentioned usable measurement information, and after receiving the request (second request message), the terminal provides the above-mentioned usable measurement information (first information) to the first network device through a second message.

[0197] Optionally, the first message includes the first indication, and when sent during the RRC connection establishment process, the second request message (UEInformationRequest) is multiplexed with the security mode command for transmission; or, the second message (UEInformationResponse) is multiplexed with the security mode completion message for transmission. That is, in an implementation mode of the present application, the terminal sends the first indication during the process of entering RRC_CONNECTED from the RRC_IDLE state, and after the terminal enters RRC_CONNECTED, the first network device sends the security mode message and the second request message at the same time, and the terminal feeds back the security mode completion message and the second message at the same time, further saving the process and signaling of the side link SL measurement reporting.

[0198] Optionally, the first message includes the first indication, and when sent during the RRC connection recovery process, the second request message is a UEInformationRequest message; or, the second message is a UEInformationResponse message. That is, in an implementation mode of the present application, the terminal sends a first indication during the process of entering RRC_CONNECTED from the RRC_INACTIVE state, and after the terminal enters RRC_CONNECTED, the first network device sends a second request message UEInformationRequest, and the terminal feeds back a second message UEInformationResponse.

[0199] Optionally, when executing the RRC connection establishment process, the first indication is carried by an RRC connection establishment completion message;

[0200] Alternatively, in the case of executing the RRC connection recovery procedure, the first indication is carried by an RRC connection recovery complete message;

[0201] Alternatively, when executing the RRC connection recovery process, the first information is carried by an RRC connection recovery completion message.

[0202] In the implementation mode of the present application, after receiving the usable measurement information sent by the terminal, the first network device selects the candidate relay device based on the above information and determines the target relay device for establishing the relay link. Among them, the above target relay device can be one or more. After receiving the target relay device indicated by the first network device, the terminal establishes a non-direct connection path between the terminal and the target relay device. The specific establishment method can refer to the relay link establishment process in the relevant technology, and the embodiment of the present invention does not limit this.

[0203] Optionally, the method further includes:

[0204] The terminal receives a third message sent by the first network device, where the third message is used to indicate a target relay device;

[0205] The terminal establishes a non-direct connection path between the terminal and the target relay device.

[0206] Optionally, the third message is an RRC reconfiguration message.

[0207] Optionally, the target relay device is determined based on the first message or the second message. The first message or the second message carries first information, that is, the first message or the second message carries at least one of the valid SL measurement results and the information of the valid candidate relay device. The first network device can determine the target relay device that can be used to establish the relay link based on the first information.

[0208] In order to facilitate understanding of the embodiments of the present application, the processes that can be executed in the present application are exemplarily described below.

[0209] like Figure 6 As shown, Example 1 (for RRC_CONNECTED->RRC_IDLE Remote UE)

[0210] Step 0: The Remote UE is in the RRC_CONNECTED state and enters the RRC_IDLE state after receiving the RRCRelease message from the serving base station.

[0211] The Remote UE obtains the SL measurement configuration information in the RRC_IDLE state according to at least one of the system message (e.g., SIB12) and / or the RRCRelease message: including at least one of the SL measurement frequency list, the SL measurement amount, and the SL measurement reporting threshold;

[0212] The frequency points of SL measurement shall follow the RRCRelease configuration first. If RRCRelease does not configure the frequency point list of SL measurement, it shall follow the system message (serving cell SIB) configuration.

[0213] The RRCRelease message may further include: at least one of: a valid area for SL measurement (e.g., a Cell ID list), a valid object for SL measurement (e.g., a Relay UE ID list), and a valid duration for SL measurement;

[0214] When the Remote UE is released to the RRC_IDLE state, it performs the following operations:

[0215] Provide SL frequency information to the upper layer of the UE based on the frequency measured by the SL, so that the upper layer triggers the SL discovery process;

[0216] Start SL measurement according to the SL measurement frequency point;

[0217] Start the SL measurement timer according to the effective duration of the SL measurement;

[0218] Conditions for Remote UE to suspend or stop measurement:

[0219] The effective duration of SL measurement, timer, times out, and the measurement stops;

[0220] If it is not a valid object for SL measurement, the UE may not measure it;

[0221] If the cell to which the UE reselects does not support L2 U2N relay (determined by indication sl-L2U2N-Relay-r17 in the relevant technology) or does not support multi-path relay or does not support fast multi-path setup measurement;

[0222] Step 1. The Remote UE sends an RRCSetupRequest message to the base station via the Uu air interface.

[0223] Step 2. The base station replies an RRCSetup message to the Remote UE via the Uu air interface.

[0224] Step 3. The Remote UE sends an RRCSetupComplete message to the base station through the Uu air interface.

[0225] The Remote UE meets the following combination of conditions: there are SL measurement results that meet the threshold, SL measurement results that meet the valid objects, the serving base station or serving cell indicates that multi-path relay or fast multi-path setup measurement is supported, and RRCSetupComplete indicates that there are available SL measurement results or a valid candidate relay UE is found, where a valid candidate relay UE is defined as a UE that meets the relay UE selection criteria.

[0226] According to steps 1-3, the Remote UE completes the establishment of the direct connection path.

[0227] Step 4. The base station sends a SecurityModeCommand message to the Remote UE through the Uu air interface.

[0228] Step 4a. On the premise that RRCSetupComplete indicates that there are available SL measurement results or a candidate relay UE is found, the base station obtains the SL measurement results through a UEInformationRequest request.

[0229] Note: Step 4a can be sent together with the downlink multiplexing of step 4, or it can be another downlink message after step 4 and sent independently.

[0230] Step 5. The Remote UE replies with a SecurityModeComplete message to the base station via the Uu air interface.

[0231] Step 5a. The Remote UE replies a UEInformationResponse message to the base station via the Uu air interface, where the UEInformationResponse message carries the SL measurement result, where the SL measurement result includes at least one of: SD-RSRP measurement result, SL-RSRP measurement result, relay UE ID, and relay UE serving cell ID.

[0232] Note: The prerequisite for executing step 5a is that the security activation process related to steps 4 and 5 is successful. In addition, step 5a can be sent together with the uplink multiplexing of step 5, or it can be another uplink message after step 5 and sent independently.

[0233] Step 6. The base station sends an RRCReconfiguration message to the Remote UE via the Uu air interface. The RRCReconfiguration message indicates that an indirect path is established via a certain relay UE. The certain relay UE here is based on the relay UE reported in step 5a.

[0234] Step 7a. The Remote UE sends an RRCReconfigurationComplete message to the base station via the Uu air interface.

[0235] Step 7b. Optionally, the Remote UE also sends an RRCReconfigurationComplete message to the base station through the Relay UE, for example, when the Remote UE is configured with split SRB1 with duplication enabled.

[0236] According to steps 4-7, the Remote UE completes the establishment of the indirect path.

[0237] like Figure 7 As shown, Example 2 (for RRC_CONNECTED->RRC_INACTIVE Remote UE)

[0238] Step 0: The Remote UE is in the RRC_CONNECTED state and receives the RRCReleasewithsuspendconfig message from the serving base station and enters the RRC_INACTIVE state.

[0239] The Remote UE obtains the SL measurement configuration information in the RRC_INACTIVE state according to at least one of the system message (e.g., SIB12) and / or the RRCRelease message: including at least one of the SL measurement frequency list, the SL measurement amount, and the SL measurement reporting threshold;

[0240] The frequency points of SL measurement shall follow the RRCRelease configuration first. If RRCRelease does not configure the frequency point list of SL measurement, it shall follow the serving cell SIB configuration.

[0241] The RRCRelease message may further include: at least one of: a valid area for SL measurement (e.g., a Cell ID list), a valid object for SL measurement (e.g., a Relay UE ID list), and a valid duration for SL measurement;

[0242] When the Remote UE is released to the RRC_INACTIVE state, it performs the following operations:

[0243] Provide SL frequency information to the upper layer of the UE based on the frequency measured by the SL, so that the upper layer triggers the SL discovery process;

[0244] Start SL measurement according to the SL measurement frequency point;

[0245] Start the SL measurement timer according to the effective duration of the SL measurement.

[0246] Conditions for Remote UE to suspend or stop measurement:

[0247] The effective duration of SL measurement, timer, times out, and the measurement stops;

[0248] If it is not a valid object for SL measurement, the UE may not measure it;

[0249] If the cell to which the UE reselects does not support L2 U2N relay (determined by indication sl-L2U2N-Relay-r17 in the relevant technology) or does not support multi-path relay or does not support fast multi-path setup measurement;

[0250] Step 1. The Remote UE sends a RRCResumeRequest message to the base station through the Uu air interface.

[0251] Step 2a. The base station replies to the Remote UE with an RRCResume message via the Uu air interface. The RRCResume message carries a request to obtain the SL measurement result.

[0252] Step 2b. The base station replies with an RRCResume message to the Remote UE via the Uu air interface.

[0253] Step 3a. When the RRCResume message carries a request to obtain SL measurement results (corresponding to step 2a), the Remote UE sends a RRCResumeComplete message to the base station through the Uu air interface.

[0254] The Remote UE meets the following combination of conditions: there are SL measurement results that meet the threshold, SL measurement results that meet the valid objects, the serving base station or serving cell indicates that it supports multi-path relay or fast multi-path setup measurement, and the SL measurement results are carried in RRCResumeComplete, where the SL measurement results include at least one of: SD-RSRP measurement result, SL-RSRP measurement result, relay UE ID, and relay UE serving cell ID.

[0255] Step 3b. When the RRCResume message does not carry a request to obtain SL measurement results (corresponding to step 2b), the Remote UE sends a RRCResumeComplete message to the base station through the Uu air interface.

[0256] The Remote UE meets the following combination of conditions: there are SL measurement results that meet the threshold, SL measurement results that meet the valid objects, the current cell indicates that it supports multi-path relay or fast multi-path setup measurement, and the RRCResumeComplete carries an indication of available SL measurement results or the discovery of a candidate relay UE, where the candidate relay UE is defined as a UE that meets the relay UE selection criteria.

[0257] According to steps 1-3, the Remote UE completes the establishment of the direct connection path.

[0258] After executing steps 2a-3a above, refer to Figure 7 Follow steps 4-5 for part (a) of the procedure.

[0259] Step 4. The base station sends an RRCReconfiguration message to the Remote UE via the Uu air interface. The RRCReconfiguration message indicates that a non-direct path is established through a relay UE. For the process of 2a-3a, the relay UE here is the relay UE reported in step 3a. Step 5a. The Remote UE sends an RRCReconfigurationComplete message to the base station via the Uu air interface.

[0260] Step 5b. Optionally, the Remote UE also sends an RRCReconfigurationComplete message to the base station through the Relay UE, for example, when the Remote UE is configured with split SRB1 with duplication enabled.

[0261] According to steps 4-5, the Remote UE completes the establishment of the indirect path.

[0262] After executing steps 2b-3b above, refer to Figure 7 In part (b), perform subsequent steps 4-7.

[0263] Step 4. When RRCResumeComplete indicates that there are available SL measurement results or a candidate relay UE is found, the base station obtains the SL measurement results through a UEInformationRequest request.

[0264] Step 5. The Remote UE replies a UEInformationResponse message to the base station through the Uu air interface, where the UEInformationResponse message carries the SL measurement result, where the SL measurement result includes at least one of: SD-RSRP measurement result, SL-RSRP measurement result, relay UE ID, and relay UE serving cell ID.

[0265] Step 6. The base station sends an RRCReconfiguration message to the Remote UE via the Uu air interface. The RRCReconfiguration message indicates that an indirect path is established via a certain relay UE. For the process 2b-3b, the certain relay UE here is based on the relay UE reported in step 5.

[0266] Step 7a. The Remote UE sends an RRCReconfigurationComplete message to the base station via the Uu air interface.

[0267] Step 7b. Optionally, the Remote UE also sends an RRCReconfigurationComplete message to the base station through the Relay UE, for example, when the Remote UE is configured with split SRB1 with duplication enabled.

[0268] According to steps 4-7, the Remote UE completes the establishment of the indirect path.

[0269] In the embodiment of the present application, compared with the multi-path establishment method in the related art, the time for starting the side link measurement configuration and reporting (SL relay measure config+measurementreport) in the RRC_CONNECTED state in the related art is changed (see Figure 4 ) has been optimized, and a measurement scheme suitable for SL frequency has been specifically designed to detect candidate relay UEs as early as possible, thereby reducing the overall delay of the multi-path establishment process. Furthermore, the signaling transmission and reception process can be reduced through signaling or channel multiplexing, thereby further reducing the path establishment delay.

[0270] In an embodiment of the present application, a terminal performs SL measurement in a non-connected state; the terminal sends a first message to a first network device; wherein the first message includes the first information or a first indication, the first indication is used to indicate that the terminal has the first information, and the first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device. In an embodiment of the present application, the delay in establishing a relay link is shortened by optimizing UE-related SL measurement behavior.

[0271] See also Figure 8 , Figure 8 is a flow chart of a side link SL measurement reporting method provided in an embodiment of the present application, which is used for a first network device, such as Figure 8 As shown, the method comprises the following steps:

[0272] Step 801: A first network device receives a first message sent by a terminal;

[0273] The first message includes first information or a first indication, and the first indication is used to indicate that the terminal has the first information;

[0274] The first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device;

[0275] The valid SL measurement result is obtained by the terminal performing SL measurement in a non-connected state;

[0276] The information of the valid candidate relay device is obtained by the terminal performing SL measurement in a non-connected state.

[0277] Optionally, the first network device receiving a first message sent by a terminal includes at least one of the following:

[0278] The first network device receives a first message sent by the terminal during the execution of the RRC connection establishment process; the first message includes the first indication;

[0279] Alternatively, the first network device receives a first message sent by the terminal during the execution of the RRC connection recovery process; the first message includes the first information or the first indication;

[0280] Alternatively, a first message is sent by the receiving terminal in a connected state, where the first message includes the first information or the first indication.

[0281] Optionally, when the first message includes the first information, before the first network device receives the first message sent by the terminal, the method further includes:

[0282] The first network device sends a first request message to the terminal; the first request message includes a second indication for requesting to report the first information;

[0283] The first network device receiving a first message sent by a terminal includes: the first network device receiving a first message sent by the terminal in response to the first request message.

[0284] Optionally, when the first message includes the first indication, after the first network device receives the first message sent by the terminal, the method further includes:

[0285] A second request message sent by the first network device to the terminal, the second request message including a third indication for requesting to report the first information;

[0286] The first network device receives a second message sent by the terminal in response to the second request message;

[0287] The second message includes the first information.

[0288] Optionally, the method further includes:

[0289] The first network device sends a third message to the terminal, where the third message indicates a target relay device.

[0290] It should be noted that this embodiment is Figure 5 The implementation method of the first network device corresponding to the embodiment shown in the figure can be found in the specific implementation method of the first network device. Figure 5 To avoid duplication, the relevant descriptions in the embodiment shown in the figure will not be repeated in this embodiment. Figure 5 All implementations in the embodiment are applicable to the method embodiment executed by the first network device, and can achieve the same or similar beneficial effects. To avoid repeated description, this embodiment will not be described in detail.

[0291] See also Fig. 9 , Fig. 9 is a flowchart of a side link SL measurement configuration method provided in an embodiment of the present application, which is used for a second network device, such as Fig. 9 As shown, the method comprises the following steps:

[0292] Step 901: The second network device sends SL measurement configuration information to the terminal;

[0293] The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message;

[0294] The SL measurement configuration information is used by the terminal to perform the SL measurement in a non-connected state.

[0295] Optionally, the SL measurement configuration information includes at least one of the following: a frequency of SL measurement, a SL measurement amount, and a SL measurement reporting threshold.

[0296] Optionally, the SL measurement configuration in the RRC connection release message further includes at least one of the following information: a valid area for SL measurement, a valid object for SL measurement, and a valid duration for SL measurement.

[0297] It should be noted that this embodiment is Figure 5 The implementation method of the corresponding second network device in the embodiment shown in the figure can be found in the specific implementation method of the second network device in the embodiment shown in the figure. Figure 5 To avoid duplication, the relevant descriptions in the embodiment shown in the figure will not be repeated in this embodiment. Figure 5 All implementations in the embodiment are applicable to the method embodiment executed by the second network device, and can achieve the same or similar beneficial effects. To avoid repeated description, this embodiment will not be described in detail.

[0298] It should be noted that the second network device in the embodiment of the present application is Figure 8The first network device in the embodiment example may be the same network device or a different network device. When the two are the same network device, the first network device may be described as the second network device, or the second network device may be described as the first network device.

[0299] The embodiments of the present application provide Figure 5 The method of the embodiment shown in the figure can be executed by a terminal. Figure 5 The method of the illustrated embodiment is taken as an example to illustrate the terminal device provided by the embodiment of the present application.

[0300] A terminal, comprising:

[0301] A measurement module, used for performing SL measurement in a non-connected state;

[0302] A first sending module, configured to send a first message to a first network device;

[0303] The first message includes first information or a first indication, the first indication is used to indicate that the terminal has the first information, and the first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device.

[0304] Optionally, the first sending module includes:

[0305] A first sending submodule, configured to send a first message to a first network device when a first preset condition is met;

[0306] The first preset condition includes at least one of the following:

[0307] The terminal has first information;

[0308] The service node of the terminal supports layer 2 U2N relay

[0309] The service node of the terminal supports multi-path relay;

[0310] The service node of the terminal supports SL measurement in a non-connected state.

[0311] Optionally, the first sending module includes:

[0312] A second sending submodule, configured to send a first message to a first network device during the execution of an RRC connection establishment process; the first message includes the first indication;

[0313] Alternatively, the third sending submodule is used to send a first message to the first network device during the execution of the RRC connection recovery process; the first message includes the first information or the first indication.

[0314] Optionally, the first message includes first information, and the terminal further includes:

[0315] A second receiving module, configured to receive a first request message sent by the first network device; the first request message includes a second indication for requesting to report the first information;

[0316] Wherein, the first sending module includes:

[0317] The fourth sending submodule is used to send a first message to the first network device in response to the first request message.

[0318] Optionally, the first message includes a first indication, and the terminal further includes:

[0319] A third receiving module, used to receive a second request message sent by the first network device, where the second request message includes a third indication for requesting to report the first information;

[0320] A third sending module, configured to, in response to the second request message, send, by the terminal, a second message to the first network device;

[0321] The second message includes the first information.

[0322] Optionally, the terminal further includes:

[0323] a fourth receiving module, configured to receive a third message sent by the first network device, wherein the third message is used to indicate a target relay device;

[0324] An establishing module is used to establish a non-direct connection path between the terminal and the target relay device.

[0325] Optionally, the terminal further includes:

[0326] A fifth receiving module, configured to receive SL measurement configuration information sent by the second network device;

[0327] The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message;

[0328] The SL measurement configuration information is used by the terminal to perform the side link SL measurement in a non-connected state.

[0329] Optionally, the SL measurement configuration information includes at least one of the following: a frequency of SL measurement, a SL measurement amount, and a SL measurement reporting threshold.

[0330] Optionally, the SL measurement configuration information in the RRC connection release message further includes at least one item of the following information: a valid area for SL measurement, a valid object for SL measurement, and a valid duration for SL measurement.

[0331] Optionally, the measurement module includes:

[0332] The first measurement submodule is used to: when the system message and the RRC connection release message received by the terminal both contain SL measurement configuration information of a target type, perform SL measurement according to the measurement configuration information corresponding to the SL measurement configuration information of the target type in the RRC connection release message.

[0333] Optionally, the measurement module includes:

[0334] a triggering module, configured to, when the SL measurement configuration information includes a frequency point for SL measurement, indicate to an upper layer of the terminal to trigger a SL discovery process;

[0335] The second measurement submodule is used to perform SL measurement on the candidate relay device determined by the SL discovery process.

[0336] Optionally, the terminal further includes:

[0337] A stop module, used for pausing or stopping SL measurement when a second preset condition is met;

[0338] The second preset condition includes at least one of the following:

[0339] The timer corresponding to the validity period of the SL measurement has expired;

[0340] The candidate relay device determined in the SL discovery process is not a valid object for SL measurement;

[0341] The cell reselected by the terminal does not support layer 2 U2N relay;

[0342] The cell reselected by the terminal does not support multipath relay;

[0343] The cell reselected by the terminal does not support SL measurement in a non-connected state.

[0344] Optionally, the valid SL measurement result includes at least one of the following: a SL measurement result greater than or equal to a first preset threshold, a SL measurement result that conforms to a valid area; a SL measurement result that conforms to a valid object;

[0345] Alternatively, the valid candidate relay device satisfies at least one of the following conditions:

[0346] A relay device whose SL link quality with the terminal is greater than or equal to a second preset threshold;

[0347] The same relay device as the serving base station of the terminal;

[0348] Relay equipment that is the same as or equivalent to the public land mobile network PLMN serving the terminal;

[0349] A relay device whose Uu link quality with a serving base station is greater than or equal to a third preset threshold;

[0350] Relay equipment that meets the valid targets of SL measurement.

[0351] Optionally, the SL measurement result includes at least one of the following: a reference signal received power SD-RSRP measurement result of a side link discovery message, a side link reference signal received power SL-RSRP measurement result, a relay device identifier, and a relay device service cell identifier.

[0352] It should be noted that the terminal provided in the embodiment of the present invention is a device capable of executing the above-mentioned SL measurement reporting method, and all implementation methods in the above-mentioned SL measurement reporting method embodiment are applicable to the terminal and can achieve the same or similar beneficial effects. To avoid repeated description, this embodiment will not be repeated.

[0353] The terminal in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices other than a terminal. For example, the terminal may include but is not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0354] The terminal provided in the embodiment of the present application can achieve Figures 5 to 9 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0355] The embodiments of the present application provide Figure 8 The method of the embodiment shown in the figure can be executed by the first network device. Figure 8 The method of the illustrated embodiment is taken as an example to illustrate the first network device provided by the embodiment of the present application.

[0356] The first network device comprises:

[0357] A first receiving module, used to receive a first message sent by a terminal;

[0358] The first message includes first information or a first indication, and the first indication is used to indicate that the terminal has the first information;

[0359] The first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device;

[0360] The valid SL measurement result is obtained by the terminal performing SL measurement in a non-connected state;

[0361] The information of the valid candidate relay device is obtained by the terminal performing SL measurement in a non-connected state.

[0362] Optionally, the first receiving module includes:

[0363] A first receiving submodule, configured to receive a first message sent by the terminal during the execution of the RRC connection establishment process; the first message includes the first indication;

[0364] Alternatively, the second receiving submodule is used to receive a first message sent by the terminal during the execution of the RRC connection recovery process; the first message includes the first information or the first indication.

[0365] Optionally, the first network device further includes:

[0366] a fourth sending module, configured to send a first request message to the terminal; the first request message includes a second indication for requesting to report the first information;

[0367] The first receiving module includes:

[0368] The third receiving submodule is configured to receive a first message sent by the terminal in response to the first request message.

[0369] Optionally, the first network device further includes:

[0370] a fifth sending module, configured to send a second request message to the terminal, wherein the second request message includes a third indication for requesting to report the first information;

[0371] A sixth receiving module, configured to receive a second message sent by the terminal in response to the second request message;

[0372] The second message includes the first information.

[0373] Optionally, the first network device further includes:

[0374] A sixth sending module is used to send a third message to the terminal, where the third message indicates a target relay device.

[0375] It should be noted that the first network device provided in the embodiment of the present invention is a device capable of executing the above-mentioned SL measurement reporting method, and all implementation methods in the above-mentioned SL measurement reporting method embodiment are applicable to the first network device, and can achieve the same or similar beneficial effects. To avoid repeated description, this embodiment will not be repeated.

[0376] The first network device provided in the embodiment of the present application can achieve Figures 5 to 9 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0377] The embodiments of the present application provide Fig. 9 The method of the embodiment shown in the figure can be executed by the second network device. Fig. 9 The method of the illustrated embodiment is taken as an example to illustrate the second network device provided in the embodiment of the present application.

[0378] The second network device comprises:

[0379] A second sending module, configured for the second network device to send SL measurement configuration information to the terminal;

[0380] The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message;

[0381] The SL measurement configuration information is used by the terminal to perform the SL measurement in a non-connected state.

[0382] Optionally, the SL measurement configuration information includes at least one of the following: a frequency of SL measurement, a SL measurement amount, and a SL measurement reporting threshold.

[0383] Optionally, the SL measurement configuration in the RRC connection release message further includes at least one of the following information: a valid area for SL measurement, a valid object for SL measurement, and a valid duration for SL measurement.

[0384] It should be noted that the second network device provided in the embodiment of the present invention is a device capable of executing the above-mentioned SL measurement configuration method, and all implementation methods in the above-mentioned SL measurement configuration method embodiment are applicable to the second network device, and can achieve the same or similar beneficial effects. To avoid repeated description, this embodiment will not be repeated.

[0385] The second network device provided in the embodiment of the present application can achieve Figures 5 to 9 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0386] like Fig.10As shown, the embodiment of the present application also provides a communication device 1000, including a processor 1001 and a memory 1002, the memory 1002 stores a program or instruction that can be run on the processor 1001, for example, when the communication device 1000 is a terminal, the program or instruction is executed by the processor 1001 to implement the above Figure 5 When the communication device 1000 is a network side device, the program or instruction is executed by the processor 1001 to implement the above Figure 8 or Fig. 9 The various steps of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0387] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 5 The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig.11 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0388] The terminal 1100 includes but is not limited to: a radio frequency unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user input unit 1107, an interface unit 1108, a memory 1109 and at least some of the components of a processor 1110.

[0389] Those skilled in the art will appreciate that the terminal 1100 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1110 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.11 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0390] It should be understood that in the embodiment of the present application, the input unit 1104 may include a graphics processing unit (GPU) 11041 and a microphone 11042, and the graphics processor 11041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1107 includes a touch panel 11071 and at least one of other input devices 11072. The touch panel 11071 is also called a touch screen. The touch panel 11071 may include two parts, a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0391] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1101 can transmit the data to the processor 1110 for processing; in addition, the RF unit 1101 can send uplink data to the network side device. Generally, the RF unit 1101 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0392] The memory 1109 can be used to store software programs or instructions and various data. The memory 1109 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1109 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1109 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0393] The processor 1110 may include one or more processing units; optionally, the processor 1110 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1110.

[0394] The processor 1110 is used for the terminal to perform SL measurement when the terminal is in a non-connected state.

[0395] The radio frequency unit 1101 is configured to send a first message to a first network device;

[0396] The first message includes first information or a first indication, the first indication is used to indicate that the terminal has the first information, and the first information includes at least one of the following:

[0397] Valid SL measurement results;

[0398] Information about valid candidate relay devices.

[0399] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the method embodiment Figure 5 The related descriptions are the same or corresponding technical effects, and to avoid repetition, they will not be repeated here.

[0400] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 8 or Fig. 9 The steps of the method embodiment shown. This network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0401] Specifically, the embodiment of the present application also provides a network side device. Fig.12 As shown, the network side device 1200 includes: an antenna 121, a radio frequency device 122, a baseband device 123, a processor 124 and a memory 125. The antenna 121 is connected to the radio frequency device 122. In the uplink direction, the radio frequency device 122 receives information through the antenna 121 and sends the received information to the baseband device 123 for processing. In the downlink direction, the baseband device 123 processes the information to be sent and sends it to the radio frequency device 122. The radio frequency device 122 processes the received information and sends it out through the antenna 121.

[0402] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 123, which includes a baseband processor.

[0403] The baseband device 123 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.12 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 125 through a bus interface to call the program in the memory 125 to execute the first network device or the second network device operation shown in the above method embodiment.

[0404] The network side device may further include a network interface 126, which is, for example, a Common Public Radio Interface (CPRI).

[0405] Specifically, the network side device 1200 of the embodiment of the present invention further includes: instructions or programs stored in the memory 125 and executable on the processor 124, and the processor 124 calls the instructions or programs in the memory 125 to execute. Figure 8 or Fig. 9 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0406] The embodiment of the present application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, the above Figure 5 Each process of the method embodiment shown in the figure, or the program or instruction is executed by the processor to implement the above Figure 8 The various processes of the method embodiment shown, or the program or instruction is executed by the processor to implement the above Fig. 9 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0407] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0408] The present application also provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the above Figure 5 The various processes of the method embodiment shown, or, to implement the above Figure 8 The various processes of the method embodiment shown, or, to implement the above Fig. 9 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0409] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0410] The present application embodiment further provides a computer program / program product, wherein the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the above Figure 5 The various processes of the method embodiment shown, or the computer program / program product is executed by at least one processor to implement the above Figure 8 The various processes of the method embodiment shown, or the computer program / program product is executed by at least one processor to implement the above Fig. 9The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0411] An embodiment of the present application also provides a wireless communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the side link SL measurement reporting method as described above, and the network side device can be used to execute the steps of the side link SL measurement reporting or side link SL measurement configuration method as described above.

[0412] An embodiment of the present application also provides a wireless communication system, including: a terminal, a first network device and a second network device, wherein the terminal can be used to execute the steps of the side link SL measurement reporting as described above, the first network device can be used to execute the steps of the side link SL measurement reporting method as described above, and the second network device can be used to execute the steps of the side link SL measurement configuration method as described above.

[0413] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0414] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0415] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A side link SL measurement reporting method, characterized in that: include: The terminal performs SL measurement in a non-connected state; The terminal sends a first message to the first network device; The first message includes first information or a first indication, the first indication is used to indicate that the terminal has the first information, and the first information includes at least one of the following: Valid SL measurement results; Information about valid candidate relay devices.

2. The method according to claim 1, characterized in that The terminal sending a first message to a first network device includes: The terminal sends a first message to the first network device when a first preset condition is met; The first preset condition includes at least one of the following: The terminal has first information; The service node of the terminal supports layer 2 U2N relay The service node of the terminal supports multi-path relay; The service node of the terminal supports SL measurement in a non-connected state.

3. The method according to claim 1 or 2, characterized in that: The terminal sending a first message to a first network device includes: The terminal sends a first message to the first network device during the execution of the RRC connection establishment process; the first message includes the first indication; Alternatively, the terminal sends a first message to the first network device during the execution of the RRC connection recovery process; the first message includes the first information or the first indication.

4. The method according to any one of claims 1 to 3, characterized in that The first message includes first information. Before the terminal sends the first message to the first network device, the method further includes: receiving a first request message sent by the first network device; the first request message including a second indication for requesting to report the first information; The terminal sending a first message to the first network device includes: The terminal sends a first message to the first network device in response to the first request message.

5. The method according to any one of claims 1 to 3, characterized in that: The first message includes a first indication. After the terminal sends the first message to the first network device, the method further includes: The terminal receives a second request message sent by the first network device, where the second request message includes a third indication for requesting to report the first information; In response to the second request message, the terminal sends a second message to the first network device; The second message includes the first information.

6. The method according to any one of claims 1 to 4, characterized in that The method further comprises: The terminal receives a third message sent by the first network device, where the third message is used to indicate a target relay device; The terminal establishes a non-direct connection path between the terminal and the target relay device.

7. The method according to any one of claims 1 to 6, characterized in that Before the terminal performs the side link SL measurement in the non-connected state, the method further includes: The terminal receives SL measurement configuration information sent by the second network device; The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message; The SL measurement configuration information is used by the terminal to perform the side link SL measurement in a non-connected state.

8. The method according to claim 7, characterized in that The SL measurement configuration information includes at least one of the following: a frequency of SL measurement, a SL measurement amount, and a SL measurement reporting threshold.

9. The method according to claim 8, characterized in that The SL measurement configuration information in the RRC connection release message further includes at least one of the following information: a valid area for SL measurement, a valid object for SL measurement, and a valid duration for SL measurement.

10. The method according to any one of claims 7 to 9, characterized in that: The terminal performs SL measurement, including: In a case where both the system message and the RRC connection release message received by the terminal include SL measurement configuration information of a target type, SL measurement is performed according to the measurement configuration information corresponding to the SL measurement configuration information of the target type in the RRC connection release message.

11. The method according to any one of claims 8 to 10, characterized in that: In a case where the SL measurement configuration information includes a frequency point for SL measurement, the terminal performs side link SL measurement, including: The terminal indicates to an upper layer of the terminal that a SL discovery process is triggered; The terminal performs SL measurement on the candidate relay devices determined by the SL discovery process.

12. The method according to any one of claims 1 to 11, characterized in that The method further includes: the terminal suspending or stopping SL measurement when a second preset condition is met; The second preset condition includes at least one of the following: The timer corresponding to the validity period of the SL measurement times out; The candidate relay device determined in the SL discovery process is not a valid object for SL measurement; The cell reselected by the terminal does not support layer 2 U2N relay; The cell reselected by the terminal does not support multipath relay; The cell reselected by the terminal does not support SL measurement in a non-connected state.

13. The method according to any one of claims 1 to 12, characterized in that The valid SL measurement result includes at least one of the following: a SL measurement result greater than or equal to a first preset threshold, a SL measurement result that conforms to a valid area, and a SL measurement result that conforms to a valid object; Alternatively, the valid candidate relay device satisfies at least one of the following conditions: A relay device whose SL link quality with the terminal is greater than or equal to a second preset threshold; The same relay device as the serving base station of the terminal; A relay device that is the same as or equivalent to the public land mobile network PLMN serving the terminal; A relay device whose Uu link quality with a serving base station is greater than or equal to a third preset threshold; Relay equipment that meets the valid targets of SL measurement.

14. The method according to claim 13, characterized in that The SL measurement result includes at least one of the following: a side link discovery message reference signal received power SD-RSRP measurement result, a side link reference signal received power SL-RSRP measurement result, a relay device identifier, and a relay device serving cell identifier.

15. A SL measurement reporting method, characterized in that: include: The first network device receives a first message sent by the terminal; The first message includes first information or a first indication, and the first indication is used to indicate that the terminal has the first information; The first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device; The valid SL measurement result is obtained by the terminal performing SL measurement in a non-connected state; The information of the valid candidate relay device is obtained by the terminal performing SL measurement in a non-connected state.

16. The method according to claim 15, characterized in that The first network device receives a first message sent by a terminal, including at least one of the following: The first network device receives a first message sent by the terminal during the execution of the RRC connection establishment process; the first message includes the first indication; Alternatively, the first network device receives a first message sent by the terminal during the execution of the RRC connection recovery procedure; the first message includes the first information or the first indication.

17. The method according to claim 15 or 16, characterized in that In the case where the first message includes the first information, before the first network device receives the first message sent by the terminal, the method further includes: The first network device sends a first request message to the terminal; the first request message includes a second indication for requesting to report the first information; The first network device receiving a first message sent by a terminal includes: the first network device receiving a first message sent by the terminal in response to the first request message.

18. The method according to claim 15 or 16, characterized in that In the case where the first message includes the first indication, after the first network device receives the first message sent by the terminal, the method further includes: A second request message sent by the first network device to the terminal, the second request message including a third indication for requesting to report the first information; The first network device receives a second message sent by the terminal in response to the second request message; The second message includes the first information.

19. The method according to any one of claims 15 to 18, characterized in that The method further comprises: The first network device sends a third message to the terminal, where the third message indicates a target relay device.

20. A SL measurement configuration method, characterized in that: include: The second network device sends SL measurement configuration information to the terminal; The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message; The SL measurement configuration information is used by the terminal to perform the SL measurement in a non-connected state.

21. The method according to claim 20, characterized in that The SL measurement configuration information includes at least one of the following: a frequency of SL measurement, a SL measurement amount, and a SL measurement reporting threshold.

22. The method according to claim 21, characterized in that The SL measurement configuration in the RRC connection release message further includes at least one of the following information: a valid area for SL measurement, a valid object for SL measurement, and a valid duration for SL measurement.

23. A terminal, characterized in that: include: A measurement module, used for performing SL measurement in a non-connected state; A first sending module, configured to send a first message to a first network device; The first message includes first information or a first indication, the first indication is used to indicate that the terminal has the first information, and the first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device.

24. A first network device, characterized in that: include: A first receiving module, used to receive a first message sent by a terminal; The first message includes first information or a first indication, and the first indication is used to indicate that the terminal has the first information; The first information includes at least one of the following: a valid SL measurement result; information of a valid candidate relay device; The valid SL measurement result is obtained by the terminal performing SL measurement in a non-connected state; The information of the valid candidate relay device is obtained by the terminal performing SL measurement in a non-connected state.

25. A second network device, characterized in that: A second sending module, configured for the second network device to send SL measurement configuration information to the terminal; The SL measurement configuration information is sent via at least one of a system message and an RRC connection release message; The SL measurement configuration information is used by the terminal to perform the SL measurement in a non-connected state.

26. A terminal, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the SL measurement reporting method as described in any one of claims 1 to 14 are implemented.

27. A network side device, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the SL measurement reporting method as described in any one of claims 15 to 19, or when the program or instruction is executed by the processor, it implements the steps of the SL measurement configuration method as described in any one of claims 20 to 22.

28. A readable storage medium, characterized in that: The readable storage medium stores programs or instructions, and when the programs or instructions are executed by the processor, they implement the SL measurement reporting method as described in any one of claims 1-14, or implement the steps of the SL measurement reporting method as described in any one of claims 15 to 19, or implement the steps of the SL measurement configuration method as described in any one of claims 20 to 22.

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