Method and apparatus for determining target UE in terminal device (UE)-to-UE relay scenario

Abstract

[Solution] An embodiment of the present disclosure discloses a method for determining a target UE in a terminal device UE-to-UE relay scenario, the method being executed by a first UE and including the steps of: acquiring sidelink measurements between the first UE and a second UE, the sidelink measurements including a sidelink communication reference signal received power (SL-RSRP) and / or a sidelink discovery reference signal received power (SD-RSRP); determining whether the first UE can serve as a relay UE based on the sidelink measurements between the first UE and the second UE and a predefined threshold; and periodically broadcasting a notification message in response to the first UE being able to serve as a relay UE. By implementing the embodiment of the present disclosure, the first UE can determine whether it can serve as a relay UE and provide a relay function to other UEs based on the acquired sidelink measurements between the first UE and the second UE and the predefined threshold.

Description

[Technical Field]

[0001] The present disclosure relates to the field of communication technologies, and more particularly to a method and apparatus for determining a target UE in a terminal device (UE)-to-UE relay scenario. [Background technology]

[0002] In related technology, terminal device (UE) A can connect to UE B through a relay of UE C rather than directly connecting to UE B. Here, UE A and UE B are remote UEs, and UE C, which provides the relay function, is a relay UE, and unicast communication is performed between the connected UEs via a sidelink. This architecture is called U2U (UE to UE) relay. To ensure smooth U2U relay, UE C needs to determine whether UE A and UE B are target UEs that can use UE C's relay function. Summary of the Invention [Problem to be solved by the invention]

[0003] An embodiment of the present disclosure provides a method and apparatus for determining a target UE in a terminal device (UE)-to-UE relay scenario, which can be used in fields such as telematics such as vehicle-to-everything (V2X) communication, long term evolution-vehicle (LTE-V), and vehicle-to-vehicle (V2V) communication, or fields such as smart driving and smart interconnected vehicles, and a relay UE can determine whether another UE can be a target UE in a UE-to-UE relay scenario.

[0004] According to a first aspect, an embodiment of the present disclosure provides a method for determining a target UE in a terminal device (UE)-to-UE relay scenario, the method being executed by a first UE, the method including: measuring a signal strength between the first UE and a second UE; and determining that the second UE, whose signal strength satisfies a first condition, can be a target UE.

[0005] In this technical solution, the first UE can determine whether the second UE can be the target UE based on the signal strength between them, thereby solving the problem that the relay UE cannot determine the target UE in a UE-to-UE relay scenario.

[0006] In one implementation, the signal strength satisfying a first condition includes the signal strength meeting a first threshold requirement or the signal strength continuing to meet the first threshold requirement for a first length of time.

[0007] In one alternative implementation, the first threshold is a minimum threshold, and the signal strength meeting the first threshold requirement includes the signal strength being greater than or equal to the minimum threshold, or the first threshold includes the minimum threshold and a maximum threshold, and the signal strength meeting the first threshold requirement includes the signal strength being greater than or equal to the minimum threshold and less than or equal to the maximum threshold.

[0008] In this technical solution, the first UE can determine whether the second UE can be a target UE based on the signal strength between the first UE and the second UE, the first threshold value, and the first time length, thereby solving the problem that the relay UE cannot determine the target UE in a UE-to-UE relay scenario.

[0009] In one alternative implementation, the method further includes determining the first threshold and / or the first time length based on the second UE.

[0010] Optionally, determining the first threshold and / or the first length of time based on the second UE includes receiving the first threshold and / or the first length of time transmitted from the second UE.

[0011] Optionally, the step of determining the first threshold and / or the first time length based on the second UE includes the steps of determining a correspondence relationship between a threshold and / or a time length and a service; receiving service indication information transmitted from the second UE; and determining the first threshold and / or the first time length based on the service indication information and the correspondence relationship.

[0012] Optionally, the correspondence between the threshold and / or the time length and the service is provided by at least one of a network side device, an upper layer, and an application layer.

[0013] In one implementation, the method further comprises carrying an identity of the target UE and / or measurement results of the target UE in a discovery signal.

[0014] In this technical solution, after the first UE determines that the second UE can be the target UE, it can include the target UE's identification information and / or measurement results of the target UE in the discovery signal, so that the target UE can use the relay function of the first UE based on the discovery signal.

[0015] In one alternative implementation, the measurement result is strength indication information, and the method further includes a step of comparing the signal strength between the first UE and the target UE with a second threshold value, and a step of determining strength indication information of the target UE based on the comparison result of the signal strength between the first UE and the target UE with the second threshold value.

[0016] Optionally, including the identification information of the target UE in the discovery signal includes including the identification information of the target UE in a corresponding list in the discovery signal according to strength indication information of the target UE.

[0017] Optionally, the second threshold is provided by at least one of a network side device, an upper layer, an application layer, and the target UE.

[0018] According to a second aspect, an embodiment of the present disclosure provides a method for determining a target UE in a terminal device (UE)-to-UE relay scenario, the method being executed by a second UE, and including the step of transmitting first information to a first UE for determining whether the second UE can be a target UE.

[0019] In one implementation, the first information includes at least one of a first threshold, a first time length, and service instruction information for determining the first threshold and / or the first time length.

[0020] In one alternative implementation, the first information further includes a second threshold for determining strength indication information of the target UE.

[0021] According to a third aspect, an embodiment of the present disclosure provides a method for determining a target UE in a terminal device (UE)-to-UE relay scenario, the method being performed by a network side device, the method including: transmitting second information to a first UE for determining a first threshold and / or a first length of time, wherein the first threshold and / or the first length of time is for determining whether the second UE can be a target UE, and wherein the second UE is a neighboring UE of the first UE.

[0022] In one implementation, the second information includes at least one of a threshold value and a correspondence between the threshold value and a service, and a time length and a correspondence between the time length and a service.

[0023] According to a fourth aspect, an embodiment of the present disclosure provides a communication device, the communication device having some or all of the functions of a terminal device that implements the method described in the first aspect above. For example, the functions of the communication device may include some or all of the functions of the embodiments of the present disclosure, or may include the function of implementing any one of the embodiments of the present disclosure alone. The functions can be implemented by hardware, or can be implemented by the hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0024] In one implementation, the structure of the communication device may include a transceiver module and a processing module, the processing module being configured to support the communication device to perform the corresponding functions of the above method. The transceiver module supports communication between the communication device and other devices. The communication device may further include a storage module, the storage module being used to combine the transceiver module and the processing module, and storing computer programs and data required for the communication device.

[0025] As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

[0026] According to a fifth aspect, an embodiment of the present disclosure provides a communication device, the communication device having some or all of the functions of a terminal device that implements the method described in the second aspect above. For example, the functions of the communication device may include some or all of the functions of the embodiments of the present disclosure, or may include the function of implementing any one of the embodiments of the present disclosure alone. The functions can be implemented by hardware, or can be implemented by the hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0027] In one implementation, the structure of the communication device may include a transceiver module and a processing module, the processing module being configured to support the communication device to perform the corresponding functions of the above method. The transceiver module supports communication between the communication device and other devices. The communication device may further include a storage module, the storage module being used to combine the transceiver module and the processing module, and storing computer programs and data required for the communication device.

[0028] As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

[0029] According to a sixth aspect, an embodiment of the present disclosure provides a communication device, the communication device having some or all of the functions of a terminal device that implements the method described in the third aspect above. For example, the functions of the communication device may include some or all of the functions of the embodiments of the present disclosure, or may include a function that independently implements any one of the embodiments of the present disclosure. The functions can be implemented by hardware, or can be implemented by the hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0030] In one implementation, the structure of the communication device may include a transceiver module and a processing module, the processing module being configured to support the communication device to perform the corresponding functions of the above method. The transceiver module supports communication between the communication device and other devices. The communication device may further include a storage module, the storage module being used to combine the transceiver module and the processing module, and storing computer programs and data required for the communication device.

[0031] As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

[0032] According to a seventh aspect, an embodiment of the present disclosure provides a communication device, the communication device including a processor, the processor performing the method according to the first aspect above when calling a computer program in a memory.

[0033] According to an eighth aspect, an embodiment of the present disclosure provides a communication device, the communication device including a processor, the processor performing the method according to the second aspect above when calling a computer program in a memory.

[0034] According to a ninth aspect, an embodiment of the present disclosure provides a communication device, the communication device including a processor, the processor performing the method according to the third aspect above when calling a computer program in a memory.

[0035] According to a tenth aspect, an embodiment of the present disclosure provides a communication device, the communication device including a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory to cause the communication device to perform the method according to the first aspect above.

[0036] According to an eleventh aspect, an embodiment of the present disclosure provides a communication device, the communication device including a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory to cause the communication device to perform the method according to the second aspect above.

[0037] According to a twelfth aspect, an embodiment of the present disclosure provides a communication device, the communication device including a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory to cause the communication device to perform the method according to the third aspect above.

[0038] According to a thirteenth aspect, an embodiment of the present disclosure provides a communication device, the device including a processor and an interface circuit, the interface circuit receiving and transmitting code instructions to the processor, and the processor executing the code instructions to cause the device to perform the method according to the first aspect above.

[0039] According to a fourteenth aspect, an embodiment of the present disclosure provides a communication device, the device including a processor and an interface circuit, the interface circuit receiving and transmitting code instructions to the processor, and the processor executing the code instructions to cause the device to perform the method according to the second aspect above.

[0040] According to a fifteenth aspect, an embodiment of the present disclosure provides a communication device, the device including a processor and an interface circuit, the interface circuit receiving and transmitting code instructions to the processor, and the processor executing the code instructions to cause the device to perform the method according to the third aspect above.

[0041] According to a sixteenth aspect, an embodiment of the present disclosure provides a target UE determination system in a terminal device (UE)-to-UE relay scenario, the system including a communication device according to the fourth aspect, a communication device according to the fifth aspect, and a communication device according to the sixth aspect, or the system including a communication device according to the seventh aspect, a communication device according to the eighth aspect, and a communication device according to the ninth aspect, or the system including a communication device according to the tenth aspect, a communication device according to the eleventh aspect, and a communication device according to the twelfth aspect, or the system including a communication device according to the thirteenth aspect, a communication device according to the fourteenth aspect, and a communication device according to the fifteenth aspect.

[0042] According to a seventeenth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions for use in a terminal device as defined above, the instructions, when executed, causing the terminal device to perform the method according to the first aspect above.

[0043] According to an eighteenth aspect, an embodiment of the present invention provides a readable storage medium for storing instructions for use in the above network side device, the instructions, when executed, causing the network side device to perform the method according to the above second aspect.

[0044] According to a nineteenth aspect, an embodiment of the present invention provides a readable storage medium for storing instructions for use in the above network side device, the instructions, when executed, causing the network side device to perform the method according to the above third aspect.

[0045] According to a twentieth aspect, the present disclosure further provides a computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method according to the first aspect above.

[0046] According to a twenty-first aspect, the present disclosure further provides a computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method according to the second aspect above.

[0047] According to a twenty-second aspect, the present disclosure further provides a computer program product comprising a computer program which, when executed on a computer, causes the computer to perform the method according to the third aspect above.

[0048] According to a twenty-third aspect, the present disclosure provides a chip system, the chip system including at least one processor and an interface for supporting a terminal device to realize the functionality according to the first aspect, such as determining or processing at least one of data and information according to the above method. In one possible design, the chip system further includes a memory for storing computer programs and data required by the terminal device. The chip system may be composed of a chip or may include a chip and other discrete devices.

[0049] According to a twenty-fourth aspect, the present disclosure provides a chip system, the chip system including at least one processor and an interface for supporting a network-side device to implement the functionality according to the second aspect, such as determining or processing at least one of data and information according to the above method. In one possible design, the chip system further includes a memory for storing computer programs and data required for the terminal device. The chip system may be configured by a chip or may include a chip and other discrete devices.

[0050] According to a twenty-fifth aspect, the present disclosure provides a chip system, the chip system including at least one processor and an interface for supporting a network-side device to implement the functionality according to the second aspect, such as determining or processing at least one of data and information according to the above method. In one possible design, the chip system further includes a memory for storing computer programs and data required for the terminal device. The chip system may be configured by a chip or may include a chip and other discrete devices.

[0051] According to a twenty-sixth aspect, the present disclosure provides a computer program which, when executed on a computer, causes the computer to carry out the method according to the first aspect above.

[0052] According to a twenty-seventh aspect, the present disclosure provides a computer program which, when run on a computer, causes the computer to carry out the method according to the second aspect above.

[0053] According to a twenty-eighth aspect, the present disclosure provides a computer program which, when executed on a computer, causes the computer to carry out the method according to the third aspect above. [Brief explanation of the drawings]

[0054] In order to more clearly describe the technical solutions in the embodiments or background art of the present disclosure, the following describes the drawings that need to be used in the embodiments or background art of the present disclosure. [Figure 1] 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure. [Figure 2] 1 is a schematic flowchart of a method for determining a target UE in a terminal device (UE)-to-UE relay scenario provided by an embodiment of the present disclosure; [Figure 3] 10 is a schematic flowchart of another terminal device (UE)-to-UE relay scenario target UE determination method provided by an embodiment of the present disclosure; [Figure 4] 10 is a schematic flowchart of another terminal device (UE)-to-UE relay scenario target UE determination method provided by an embodiment of the present disclosure; [Figure 5] 10 is a schematic flowchart of another terminal device (UE)-to-UE relay scenario target UE determination method provided by an embodiment of the present disclosure; [Figure 6] 10 is a schematic flowchart of another terminal device (UE)-to-UE relay scenario target UE determination method provided by an embodiment of the present disclosure; [Figure 7] FIG. 1 is a schematic configuration diagram of a communication device provided by an embodiment of the present disclosure. [Figure 8]FIG. 10 is a schematic configuration diagram of another communication device provided by an embodiment of the present disclosure. [Figure 9] 1 is a schematic diagram of a chip provided by an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0055] Hereinafter, embodiments of the present disclosure will be described in detail. Examples of the embodiments are illustrated in the accompanying drawings, in which the same or similar reference numerals throughout the drawings indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to illustrate the present disclosure and should not be construed as limiting the present disclosure. In the description of the present disclosure, unless otherwise specified, " / " means "or." For example, "A / B" can represent either A or B. In this specification, "and / or" is used only to describe the relationship between related objects and indicates that three relationships are possible. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, or B exists alone.

[0056] To better understand the method for determining a target UE in a terminal device (UE)-to-UE relay scenario disclosed by the embodiments of the present application, the following first describes a communication system applied in the embodiments of the present disclosure.

[0057] Referring to Figure 1, Figure 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure. The communication system may include, but is not limited to, one first terminal device, one second terminal device, and one network side device. The number and form of devices shown in Figure 1 are used for illustration purposes only and do not constitute limitations on the embodiments of the present application. In actual applications, the communication system may include two or more first terminal devices, two or more second terminal devices, and two or more network side devices. Take for example that the communication system shown in Figure 1 includes one first terminal device 101, one second terminal device 102, and one network side device 103.

[0058] It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as a long term evolution (LTE) system, a fifth generation (5G) mobile communication system, a 5G new radio (NR) system, or other future new mobile communication systems.

[0059] The network side device 103 in the embodiments of the present disclosure is a network-side entity for transmitting or receiving signals. For example, the network side device 101 may be an evolved base station (eNB), a transmission reception point (TRP), a next generation base station (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiments of the present disclosure do not limit the specific technology and device form adopted by the network side device. The network side device provided in the embodiments of the present disclosure may be composed of a central unit (CU) and distributed units (DUs), where the CU is also called a control unit. A CU-DU structure is adopted to separate the protocol layers of a network side device, for example, a base station, to centrally control some protocol layer functions in the CU, and to distribute some or all of the remaining protocol layer functions to the DUs, and the DUs can be centrally controlled by the CU.

[0060] The first terminal device 101 and the second terminal device 102 in the embodiments of the present disclosure are user-side entities for receiving or transmitting signals, such as mobile phones. The terminal devices may also be referred to as terminals, user equipment (UE), mobile stations (MS), mobile terminals (MT), etc. The terminal devices may be automobiles with communication capabilities, smart cars, mobile phones, wearable devices, tablets, personal computers with wireless transmission and reception capabilities, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminal devices for industrial control, wireless terminal devices for self-driving, wireless terminal devices for remote medical surgery, wireless terminal devices for smart grids, wireless terminal devices for transportation safety, wireless terminal devices for smart cities, wireless terminal devices for smart homes, etc. The embodiments of the present disclosure do not limit the specific technology and device configuration adopted by the terminal device. The communication systems described in the embodiments of the present disclosure are intended to more clearly explain the technical solutions of the embodiments of the present disclosure and do not constitute limitations on the technical solutions provided by the embodiments of the present disclosure. Those skilled in the art will recognize that, as system architectures evolve and new traffic scenarios emerge, the technical solutions provided by the embodiments of the present disclosure can be similarly applied to similar problems.

[0061] The method and apparatus for determining a target UE in a terminal device (UE)-to-UE relay scenario provided by the present disclosure will be described in detail below in conjunction with the drawings.

[0062] Referring to Figure 2, Figure 2 is a schematic flowchart of a method for determining a target UE in a terminal device (UE)-to-UE relay scenario provided by an embodiment of the present disclosure. The method is performed by a first UE. As shown in Figure 2, the method may include, but is not limited to, the following steps:

[0063] Step S201: Measure the signal strength between the first UE and the second UE.

[0064] Here, in the embodiment of the present disclosure, the signal strength may be SD-RSRP (sidelink discovery reference signal receiving power) or SL-RSRP (sidelink reference signal receiving power), where SD-RSRP is the RSRP of a discovery signal transmitted from the sidelink second UE, and SL-RSRP is the RSRP of a communication signal with the sidelink of the second UE.

[0065] For example, when a first UE receives a discovery signal from a second UE, the first UE measures the SD-RSRP between the first UE and the second UE.

[0066] As another example, if the first UE has already established a sidelink unicast connection with the second UE, the first UE measures the SL-RSRP between the first UE and the second UE.

[0067] It should be noted that in the embodiment of the present disclosure, the first UE is a relay UE in a UE-to-UE relay scenario, and the second UE is a remote UE in a UE-to-UE relay scenario.

[0068] Step S202: Determine that the second UE whose signal strength satisfies the first condition can be the target UE.

[0069] Alternatively, in a terminal device (UE)-to-UE relay scenario, a first UE can transmit a discovery signal, which carries a sidelink identifier of a target UE that can establish a sidelink connection with the first UE. After receiving the discovery signal from the first UE, a second UE can determine, based on the sidelink identifier contained therein, whether it is a target UE that can establish a sidelink connection with the first UE, and then determine whether to perform UE-to-UE relay communication with the first UE.

[0070] Alternatively, the first UE can determine that the second UE whose signal strength satisfies the first condition can be the target UE, i.e., the first UE can determine the second UE whose signal strength satisfies the first condition as the target UE with which a sidelink connection can be established.

[0071] In some implementations of the present disclosure, a second UE whose signal strength satisfies a first condition can be determined as a target UE that can perform relay communication via the relay function of the first UE, and a sidelink link can be established with the second UE so that the second UE can perform communication using the relay function of the first UE.

[0072] In some implementations of the present disclosure, a second UE whose signal strength satisfies the first condition may be determined as a candidate target UE that can perform relay communication through the relay function of the first UE. If the second UE needs to perform relay communication through the first UE, it may directly establish a sidelink link with the second UE.

[0073] By implementing the embodiments of the present disclosure, the first UE can determine whether the second UE can be a target UE based on the signal strength between them, thereby solving the problem that the relay UE cannot determine the target UE in a UE-to-UE relay scenario.

[0074] In some embodiments of the present disclosure, the signal strength satisfying the first condition may include the signal strength satisfying a first threshold requirement or the signal strength continuing to satisfy the first threshold requirement for a first length of time. Optionally, referring to Figure 3, Figure 3 is a schematic flowchart of a target UE determination method in a terminal device (UE)-to-UE relay scenario provided by an embodiment of the present disclosure. The method is performed by a first UE. As shown in Figure 3, the method may include, but is not limited to, the following steps:

[0075] Step S301: Measure the signal strength between the first UE and the second UE.

[0076] In the embodiments of the present disclosure, step S301 can be implemented using any of the embodiments of the present disclosure, and is not limited to the embodiments of the present disclosure, and the description will be omitted. For example, the signal strength between the first UE and the second UE can be measured as in step 201, and the details will be omitted.

[0077] Step S302: Determine that a second UE whose signal strength meets a first threshold requirement or whose signal strength continues to meet the first threshold requirement for a first length of time can be the target UE.

[0078] As an example, it is determined that a second UE whose signal strength between it and the first UE satisfies a first threshold requirement (for example, is equal to or greater than the first threshold) can be the target UE.

[0079] As another example, it is determined that a second UE, for which the signal strength between the first UE and the second UE satisfies a first threshold requirement for a first period of time or longer, can be the target UE.

[0080] In one alternative implementation, the first threshold is a minimum threshold, and the signal strength meeting the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold, or the first threshold includes a minimum threshold and a maximum threshold, and the signal strength meeting the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold and less than the maximum threshold.

[0081] As an example, the first threshold is the lowest threshold, and it is determined that the second UE whose signal strength with the first UE is equal to or greater than the first threshold can be the target UE.

[0082] As another example, assuming that the first threshold is the lowest threshold, it is determined that a second UE whose signal strength between it and the first UE is greater than or equal to the first threshold for a duration greater than or equal to the first length of time can be the target UE.

[0083] As another example, assuming that the first threshold includes a minimum threshold and a maximum threshold, it is determined that a second UE whose signal strength with the first UE is greater than the minimum threshold and less than the maximum threshold can be the target UE.

[0084] As another example, assuming that the first threshold includes a minimum threshold and a maximum threshold, it is determined that a second UE whose signal strength between it and the first UE is greater than or equal to the first threshold and whose duration below the maximum threshold is greater than or equal to the first time length can be the target UE.

[0085] By implementing an embodiment of the present disclosure, the first UE can determine whether the second UE can be a target UE based on the signal strength between the first UE and the second UE, the first threshold, and the first time length, thereby solving the problem that the relay UE cannot determine the target UE in a UE-to-UE relay scenario.

[0086] In some embodiments of the present disclosure, the above-mentioned method for determining a target UE in a terminal device (UE)-to-UE relay scenario may further include determining a first threshold value and / or a first time length based on the second UE.

[0087] As an example, the first UE determines the first threshold based on information transmitted from the second UE.

[0088] As another example, the first UE determines the first amount of time based on information transmitted from the second UE.

[0089] As another example, the first UE determines the first threshold and the first time period based on information transmitted from the second UE.

[0090] In one alternative implementation, the step of determining the first threshold and / or the first time length based on the second UE may include the steps of determining a correspondence between the threshold and / or the time length and the service, receiving service indication information transmitted from the second UE, and determining the first threshold and / or the first time length based on the service indication information and the correspondence.

[0091] As an example, taking the determination of the first threshold based on the second UE as an example, different thresholds corresponding to different service information are set in advance to obtain a correspondence relationship between the different service information and the different thresholds. After receiving service instruction information sent from the second UE, the first UE determines the service information indicated by the service instruction information, and determines a threshold corresponding to the service information based on the service information and the above correspondence relationship, and determines the threshold corresponding to the service information as the first threshold.

[0092] As another example, taking determining the first time length based on the second UE as an example, different time lengths corresponding to different service information are pre-set to obtain a correspondence relationship between different service information and different time lengths. After receiving service indication information transmitted from the second UE, the first UE determines the service information indicated by the service indication information, and determines the time length corresponding to the service information based on the service information and the above correspondence relationship, and determines the time length corresponding to the service information as the first time length.

[0093] As another example, taking determining the first threshold and the first time length as an example, taking different thresholds corresponding to different service information as a first threshold and a first time length as a first time length, as an example, different thresholds corresponding to different service information are set in advance to obtain a correspondence relationship between the different service information and the different thresholds, different time lengths corresponding to different service information are set in advance to obtain a correspondence relationship between the different service information and the different time lengths, the service information corresponding to the different thresholds and the service information corresponding to the different time lengths are different, the first UE receives service instruction information for indicating the first threshold and service instruction information for indicating the first time length sent from the second UE, and determines the corresponding threshold and time length based on the above service information and the above correspondence relationship, determines the threshold corresponding to the above service information as the first threshold, and determines the time length corresponding to the above service information as the first time length.

[0094] As another example, corresponding thresholds and time lengths are pre-set for various types of service information, and the thresholds and time lengths corresponding to different service information are different, thereby obtaining a correspondence relationship between different service information and different thresholds and time lengths. The first UE receives service indication information sent from the second UE, determines the service information indicated by the service indication information, and determines the threshold and time length corresponding to the service information based on the service information and the above correspondence relationship, and determines the threshold corresponding to the service information as the first threshold and the time length corresponding to the service information as the first time length.

[0095] It should be noted that in the embodiment of the present disclosure, the service indication information may be a relay service code (RSC).

[0096] Optionally, the correspondence between the threshold and / or the time length and the service may be provided by at least one of a network side device, an upper layer, and an application layer.

[0097] In one implementation of the embodiment of the present disclosure, after determining that the first UE can be a target UE, the first UE may also transmit a discovery signal including the target UE's identification information and / or measurement results of the target UE. For example, refer to FIG. 4, which is a schematic flowchart of another terminal device (UE)-to-UE relay scenario target UE determination method provided by the embodiment of the present disclosure. The method is performed by the first UE. As shown in FIG. 4, the method may include, but is not limited to, the following steps:

[0098] Step S401: Measure the signal strength between the first UE and the second UE.

[0099] In the embodiments of the present disclosure, step S401 can be implemented using any of the embodiments of the present disclosure, and is not limited to the embodiments of the present disclosure, and the description will be omitted. For example, the signal strength between the first UE and the second UE can be measured as in step 201, and the details will be omitted.

[0100] Step S402: Determine that the second UE whose signal strength satisfies the first condition can be the target UE.

[0101] In the embodiments of the present disclosure, step S402 can be realized using any of the embodiments of the present disclosure, and is not limited to the embodiments of the present disclosure, and description thereof will be omitted.

[0102] Step S403: Include the identification information of the target UE and / or the measurement result of the target UE in the discovery signal.

[0103] Here, the identification information may include a sidelink identifier of a target UE that can establish a sidelink connection with the first UE. If the identification information is included in the discovery signal, after receiving the discovery signal of the relay UE, the remote UE determines whether it is a target UE based on the UE identifier included in the discovery signal, and determines whether to perform UE-to-UE relay communication with the first UE as a relay UE.

[0104] As an example, the first UE includes the target UE's identification information in the transmitted discovery signal.

[0105] As another example, the first UE includes measurements of the target UE in the transmitted discovery signal.

[0106] As another example, the first UE includes the target UE's identification information and measurement results for the target UE in the transmitted discovery signal.

[0107] In one optional implementation form of an embodiment of the present disclosure, the above measurement result is strength indication information, and the above method may further include a step of comparing the signal strength between the first UE and the target UE with a second threshold value, and a step of determining the strength indication information of the target UE based on the comparison result of the signal strength between the first UE and the target UE with the second threshold value.

[0108] For example, the first UE compares the signal strength between the first UE and the target UE with a second threshold to obtain a comparison result, and in response to the comparison result being that the signal strength between the first UE and the target UE is greater than or equal to the second threshold, determines that the strong / weak instruction information of the target UE is strong instruction information, or in response to the comparison result being that the signal strength between the first UE and the target UE is less than the second threshold, determines that the strong / weak instruction information of the target UE is weak instruction information.

[0109] Optionally, the step of including the identification information of the target UE in the discovery signal may include the step of including the identification information of the target UE in a corresponding list in the discovery signal according to the strength indication information of the target UE.

[0110] For example, different lists corresponding to different strength instruction information are set in advance, and based on the acquired strength instruction information of the target UE, the list corresponding to the strength instruction information of the target UE is determined, and the identification information of the target UE is included in the list corresponding to the strength instruction information of the target UE.

[0111] Optionally, the second threshold may be provided by at least one of a network side device, an upper layer, an application layer, and a target UE.

[0112] By implementing an embodiment of the present disclosure, after the first UE determines that the second UE can be the target UE, the first UE can include identification information of the target UE and / or measurement results of the target UE in the discovery signal, thereby enabling the target UE to use the relay function of the first UE based on the discovery signal.

[0113] The above embodiment is an embodiment that describes a method for determining a target UE in a terminal device (UE)-to-UE relay scenario according to an embodiment of the present disclosure from the first UE side. The embodiment of the present disclosure further provides a method for determining a target UE in a terminal device (UE)-to-UE relay scenario, and the following describes an implementation of the method for determining a target UE in a terminal device (UE)-to-UE relay scenario from a second UE.

[0114] Referring to Figure 5, Figure 5 is another terminal device (UE)-to-UE relay scenario target UE determination method provided by an embodiment of the present disclosure, where the method is performed by a second UE, and as shown in Figure 5, the method may include, but is not limited to, the following steps:

[0115] Step S501: Send first information to a first UE.

[0116] Here, in the embodiment of the present disclosure, the first information is for determining whether the second UE can be the target UE.

[0117] For example, the second UE transmits first information to the first UE for determining whether the second UE can be a target UE.

[0118] In one implementation, the first information includes at least one of a first threshold, a first time length, and service indication information for determining the first threshold and / or the first time length.

[0119] For example, the service indication information is for the first UE to determine a first threshold value based on the service indication information.

[0120] As another example, the service indication information is for the first UE to determine a time length based on the service indication information.

[0121] As another example, the service indication information is for determining, by the first UE, the first threshold value and the first time length based on the service indication information.

[0122] In one alternative implementation, the first information further includes a second threshold for determining the strength indication information of the target UE.

[0123] For example, the second UE transmits first information including a second threshold to the first UE, thereby enabling the first UE to determine the strength indication information of the second UE based on the second threshold.

[0124] By implementing the embodiment of the present disclosure, the second UE sends the first information to the first UE, allowing the first UE to determine whether the second UE can be a target UE based on the specific information in the first information, thereby solving the problem that the relay UE cannot determine the target UE in a UE-to-UE relay scenario. In one implementation, the embodiment shown in Figure 5 can be implemented together with any of the embodiments of Figure 2, Figure 3, or Figure 4, i.e., the target UE can be determined by any of the embodiments of Figure 2, Figure 3, or Figure 4, and the second UE can send the first information to the first UE to inform the first UE whether the second UE can be a target UE by the embodiment shown in Figure 5.

[0125] It should be noted that the above embodiment is an embodiment that describes a method for determining a target UE in a terminal device (UE)-to-UE relay scenario according to an embodiment of the present disclosure from the first UE side and the second UE side. The embodiment of the present disclosure further provides a method for determining a target UE in a terminal device (UE)-to-UE relay scenario, and the following describes an implementation form of the method for determining a target UE in a terminal device (UE)-to-UE relay scenario from a network side device.

[0126] Referring to Figure 6, Figure 6 is another terminal device (UE)-to-UE relay scenario target UE determination method provided by an embodiment of the present disclosure, the method is performed by a network side device, and as shown in Figure 6, the method may include, but is not limited to, the following steps:

[0127] Step S601: Send second information to the first UE.

[0128] Here, the second information is for determining a first threshold and / or a first time length, and the first threshold and / or the first time length is for determining whether the second UE can be the target UE.

[0129] As an example, the network side device transmits second information to the first UE for determining a first threshold, which is used by the first UE to determine whether the second UE can be a target UE.

[0130] As another example, the network side device transmits second information to the first UE for determining the first time length, which is used by the first UE to determine whether the second UE can be a target UE.

[0131] As another example, the network side device transmits second information to the first UE for determining the first threshold and the first time length, and the first threshold and the first time length are used by the first UE to determine whether the second UE can be a target UE.

[0132] Here, the second UE is a neighboring UE of the first UE.

[0133] In one implementation, the second information includes at least one of a threshold value and a correspondence between the threshold value and a service, and a time length and a correspondence between the time length and a service.

[0134] By implementing the embodiments of the present disclosure, the network side device sends indication information to the first UE, allowing the first UE to determine whether the second UE can be the target UE based on the second information, thereby solving the problem that the relay UE cannot determine the target UE in a UE-to-UE relay scenario.

[0135] Referring to Fig. 7, Fig. 7 is a schematic configuration diagram of a communication device 70 provided by an embodiment of the present disclosure. The communication device 70 shown in Fig. 7 may include a transceiver module 701 and a processing module 702. The transceiver module 701 may include a transmitting module and / or a receiving module, where the transmitting module is used to realize a transmitting function and the receiving module is used to realize a receiving function, and the transceiver module 701 can realize the transmitting function and / or the receiving function.

[0136] The communication device 70 may be a first UE, a device within the first UE, or a device that can be matched with the first UE and used, or the communication device 70 may be a second UE, a device within the second UE, or a device that can be matched with the second UE and used, or the communication device 70 may be a network-side device, a device within the network-side device, or a device that can be matched with a network device and used.

[0137] If the communication device 70 is a first UE, the processing module 702 measures the signal strength between the first UE and a second UE, and determines that the second UE whose signal strength meets the first condition can be the target UE.

[0138] According to an apparatus according to an embodiment of the present disclosure, a first UE can determine whether a second UE can be a target UE based on the signal strength between the first UE and the second UE, thereby solving the problem that a relay UE cannot determine a target UE in a UE-to-UE relay scenario.

[0139] In one implementation, the signal strength meeting the first condition includes the signal strength meeting a first threshold requirement or the signal strength continuing to meet the first threshold requirement for a first length of time.

[0140] In one alternative implementation, the first threshold is a minimum threshold, and the signal strength meeting the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold, or the first threshold includes a minimum threshold and a maximum threshold, and the signal strength meeting the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold and less than the maximum threshold.

[0141] In one alternative implementation, the transceiver module 701 determines the first threshold and / or the first time period based on the second UE.

[0142] Optionally, the transceiver module 701 specifically receives the first threshold value and / or the first time length sent from the second UE.

[0143] Optionally, the processing module 702 specifically determines a correspondence relationship between the threshold and / or time length and the service, the transceiver module 701 specifically receives service indication information transmitted from the second UE, and the processing module 702 further determines a first threshold and / or a first time length based on the service indication information and the correspondence relationship.

[0144] Optionally, the correspondence between the threshold and / or the time length and the service is provided by at least one of a network side device, an upper layer, and an application layer.

[0145] In one implementation, the transceiver module 701 specifically includes the identification information of the target UE and / or the measurement results of the target UE in the discovery signal.

[0146] Optionally, the measurement result is strength indication information, and the processing module 702 further compares the signal strength between the first UE and the target UE with a second threshold, and determines the strength indication information of the target UE based on the comparison result of the signal strength between the first UE and the target UE with the second threshold.

[0147] Optionally, the transceiver module 701 specifically includes the identification information of the target UE in a corresponding list in the discovery signal according to the strength indication information of the target UE.

[0148] Optionally, the second threshold may be provided by at least one of a network side device, an upper layer, an application layer, and the target UE.

[0149] If the communication device 70 is the second UE, the transceiver module 701 sends first information to the first UE for determining whether the second UE can be the target UE.

[0150] In one implementation, the first information includes at least one of a first threshold, a first time length, and service indication information for determining the first threshold and / or the first time length.

[0151] In one alternative implementation, the first information further includes a second threshold for determining the strength indication information of the target UE.

[0152] According to an apparatus according to an embodiment of the present disclosure, the second UE transmits the first information to the first UE, thereby enabling the first UE to determine whether the second UE can be a target UE based on the specific information in the first information, thereby solving the problem that the relay UE cannot determine the target UE in a UE-to-UE relay scenario.

[0153] When the communication device 70 is a network side device, the transceiver module 701 sends second information to the first UE for determining a first threshold and / or a first time length, where the first threshold and / or the first time length is for determining whether the second UE can be a target UE, and where the second UE is a neighboring UE of the first UE.

[0154] In one implementation, the second information includes at least one of a threshold value and a correspondence between the threshold value and a service, and a time length and a correspondence between the time length and a service.

[0155] According to the apparatus of the embodiment of the present disclosure, the network side device sends indication information to the first UE, thereby enabling the first UE to determine whether the second UE can be the target UE based on the second information, thereby solving the problem that the relay UE cannot determine the target UE in a UE-to-UE relay scenario.

[0156] 8, which is a schematic configuration diagram of another communication device 80 provided by an embodiment of the present disclosure. The communication device 80 may be a first UE, a second UE, a network side device, a chip, chip system, processor, etc. that helps the first UE realize the above method, a chip, chip system, processor, etc. that helps the second UE realize the above method, or a chip, chip system, processor, etc. that helps the network side device realize the above method. This device can be used to realize the method described in the above method embodiment, and for details, please refer to the description of the above method embodiment.

[0157] The communication device 80 may include one or more processors 801. The processor 801 may be a general-purpose processor or a special-purpose processor. For example, it may be a baseband processor or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control a communication device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or CU, etc.), execute a computer program, and process data of the computer program.

[0158] Optionally, the communication device 80 may further include one or more memories 802 capable of storing a computer program 803, and the processor 801 executes the computer program 803 so that the communication device 80 performs the method described in the above method embodiments. Optionally, data may be further stored in the memory 802. The communication device 80 and the memory 802 may be provided separately or integrated.

[0159] Optionally, the communication device 80 may further include a transceiver 804 and an antenna 808. The transceiver 804 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit for implementing a transmitting and receiving function. The transceiver 804 may include a receiver and a transmitter, and the receiver may be referred to as a receiver or a receiving circuit for implementing a receiving function, and the transmitter may be referred to as a transmitter or a transmitting circuit for implementing a transmitting function.

[0160] Optionally, the communication device 80 may further include one or more interface circuits 806. The interface circuits 806 are used to receive and transmit code instructions to the processor 801. The processor 801 executes the code instructions to cause the communication device 80 to perform the methods described in the above method embodiments.

[0161] Here, the processor 801 is used to execute steps S201 and S202 in Fig. 2, steps S301 and S302 in Fig. 3, and steps S401 and S402 in Fig. 4. The transceiver 804 is used to execute step S501 in Fig. 5 and step S601 in Fig. 6.

[0162] In one embodiment, the processor 801 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transmitting and receiving circuit, an interface, or an interface circuit. The transmitting and receiving circuit, interface, or interface circuit for implementing the receiving and transmitting functions may be separate or integrated. The transmitting and receiving circuit, interface, or interface circuit may be used to read or write code or data, or the transmitting and receiving circuit, interface, or interface circuit may be used to transmit or communicate signals.

[0163] In one implementation, the processor 801 may store a computer program that, when executed on the processor 801, causes the communication device 80 to perform the methods described in the above method embodiments. The computer program may be hardened within the processor 801, in which case the processor 801 may be implemented by hardware.

[0164] In one implementation, the communication device 80 may include circuitry capable of performing the transmitting, receiving, or communicating functions of the method embodiments described above. The processors and transceivers described in this disclosure may be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a hybrid signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, or the like. The processors and transceivers may also be fabricated in various IC process technologies, such as complementary metal oxide semiconductor (CMOS), n-type metal oxide semiconductor (NMOS), p-type metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), or gallium arsenide (GaAs).

[0165] The communication device described in the above embodiment may be a network side device or a terminal device, but the scope of the communication device described in the present disclosure is not limited thereto, and the structure of the communication device may not be limited to that shown in FIG. 8. The communication device may be an independent device or a part of a larger device. For example, the communication device may be as follows: (1) An independent integrated circuit IC, or chip, or chip system or subsystem; (2) having a set of one or more ICs, optionally including a memory component for storing data, computer programs; (3) ASICs such as modems, (4) Modules that can be incorporated into other devices; (5) Receivers, terminal devices, smart terminal devices, mobile phones, wireless devices, handhelds, mobile units, in-vehicle devices, network-side devices, cloud devices, artificial intelligence devices, etc. (6) Others.

[0166] When the communication device may be a chip or a chip system, reference may be made to the schematic configuration diagram of the chip shown in Fig. 9. The chip shown in Fig. 9 includes a processor 901 and an interface 902. Here, the number of processors 901 may be one or more, and the number of interfaces 902 may be more than one.

[0167] When the chip is used to realize the function of a first UE, the processor 901 measures the signal strength between the first UE and the second UE and determines that the second UE whose signal strength meets the first condition can be the target UE.

[0168] In one implementation, the signal strength meeting the first condition includes the signal strength meeting a first threshold requirement or the signal strength continuing to meet the first threshold requirement for a first length of time.

[0169] In one alternative implementation, the first threshold is a minimum threshold, and the signal strength meeting the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold, or the first threshold includes a minimum threshold and a maximum threshold, and the signal strength meeting the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold and less than the maximum threshold.

[0170] In one alternative implementation, the interface 902 determines the first threshold and / or the first time period based on the second UE.

[0171] Optionally, the interface 902 specifically receives the first threshold value and / or the first time length transmitted from the second UE.

[0172] Optionally, the processor 901 specifically determines a correspondence between the threshold and / or time length and the service, the interface 902 specifically receives service indication information transmitted from the second UE, and the processor 901 further determines a first threshold and / or a first time length based on the service indication information and the correspondence.

[0173] Optionally, the correspondence between the threshold and / or the time length and the service is provided by at least one of a network side device, an upper layer, and an application layer.

[0174] In one implementation, the interface 902 specifically includes identification information of the target UE and / or a measurement result of the target UE in the discovery signal. Optionally, the measurement result is strength indication information, and the processor 901 further compares the signal strength between the first UE and the target UE with a second threshold, and determines the strength indication information of the target UE based on the comparison result of the signal strength between the first UE and the target UE with the second threshold.

[0175] Optionally, the interface 902 specifically includes the identification information of the target UE in the corresponding list in the discovery signal according to the strength indication information of the target UE.

[0176] Optionally, the second threshold may be provided by at least one of a network side device, an upper layer, an application layer, and the target UE.

[0177] If the chip is used to realize the function of a second UE, the interface 902 sends first information to the first UE for determining whether the second UE can be the target UE.

[0178] In one implementation, the first information includes at least one of a first threshold, a first time length, and service indication information for determining the first threshold and / or the first time length.

[0179] In one alternative implementation, the first information further includes a second threshold for determining the strength indication information of the target UE.

[0180] When the chip is used to realize the function of a network side device, the interface 902 sends second information to the first UE for determining a first threshold and / or a first length of time, where the first threshold and / or the first length of time is for determining whether the second UE can be a target UE, and where the second UE is a neighboring UE of the first UE.

[0181] In one implementation, the second information includes at least one of a threshold value and a correspondence between the threshold value and a service, and a time length and a correspondence between the time length and a service.

[0182] Optionally, the chip further includes a memory 903 for storing necessary computer programs and data.

[0183] Those skilled in the art can also understand that various illustrative logical blocks and steps described in the embodiments of the present disclosure can be realized by electronic hardware, computer software, or a combination of both. Whether such functions are realized by hardware or software is determined by the specific application and the overall system design requirements. Those skilled in the art can realize the described functions using various methods for each specific application, but this implementation should not be understood as exceeding the scope of protection of the embodiments of the present disclosure.

[0184] An embodiment of the present disclosure further provides a channel estimation system including a communication device as the first UE in the embodiment of Figure 7, a communication device as the second UE, and a communication device as the network side device, or including a communication device as the first UE, a communication device as the second UE, and a communication device as the network side device in the embodiment of Figure 8.

[0185] The present disclosure further provides a computer-readable storage medium having stored thereon instructions that, when executed by a computer, implement the functionality of any of the method embodiments described above.

[0186] The present disclosure further provides a computer program product that, when executed by a computer, implements the functionality of any of the above method embodiments.

[0187] The above-described embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, they may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. The processes or functions according to the above-described embodiments of the present disclosure are generated in whole or in part when the computer programs are loaded and executed by a computer. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program may be stored on a computer-readable storage medium or transmitted from one computer-readable storage medium to another; for example, the computer program may be transmitted from one website, computer, server, or data center to another via wire (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, radio, microwave, etc.). The computer-readable storage medium may be any available medium accessible by a computer, or may include a data storage device such as a server, data center, or the like integrated with one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital video disc (DVD)), or a semiconductor medium (e.g., solid state disk (SSD)).

[0188] Those skilled in the art will understand that the various numerals such as first, second, etc. in the present disclosure are merely for the convenience of explanation and do not limit the scope of the embodiments of the present disclosure, nor do they represent priority.

[0189] At least one of the features of the present disclosure may be described as one or more, and the more may be two, three, four or more, and is not limited to the present disclosure. In the embodiments of the present disclosure, for one technical feature, the technical features in the technical feature category are distinguished by "first," "second," "third," "A," "B," "C," and "D," etc., and there is no order of precedence or chronology between the technical features described as "first," "second," "third," "A," "B," "C," and "D."

[0190] The correspondences shown in each table in the present disclosure may be set or predefined. The values ​​of the information in each table are merely examples and may be set to other values ​​and are not limited to the present disclosure. When setting the correspondences between information and each parameter, it is not necessary to set all of the correspondences shown in each table. For example, in the tables of the present disclosure, the correspondences shown by certain rows may not be set. As another example, appropriate transformations such as splitting and merging can be performed based on the above tables. The names of the parameters shown in the titles of the above tables may be other names understandable by the communication device, and the values ​​or representation methods of the parameters may be other values ​​or representation methods understandable by the communication device. The above tables may be implemented using other data structures, such as arrays, queues, containers, stacks, linear tables, pointers, link tables, trees, diagrams, structures, classes, heaps, hash lists, or hash tables.

[0191] Predefined in this disclosure can be understood as defined, predefined, stored, prestored, prenegotiated, pre-set, hardened, or pre-baked.

[0192] Those skilled in the art will recognize that the units and algorithm steps of each example described in the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether a function is implemented in hardware or software is determined by the specific application and design constraints of the technical solution. Those skilled in the art may realize the described functions using different methods for each specific application, but such realization should not be considered beyond the scope of the present disclosure.

[0193] As those skilled in the art will clearly understand, for convenience and brevity of description, the specific operating processes of the above-described systems, devices and units can refer to the corresponding processes in the above-described method embodiments, and the description will be omitted here.

[0194] As described above, the present disclosure only covers specific embodiments, but the scope of protection of the present disclosure is not limited thereto, and those skilled in the art can easily imagine that modifications or replacements within the technical scope disclosed in the present disclosure should fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be determined based on the scope of protection of the claims.

Claims

1. A method for determining a target UE in a terminal device (UE)-to-UE relay scenario, the method being performed by a first UE, the method comprising: measuring a signal strength between the first UE and a second UE; determining that a second UE whose signal strength satisfies a first condition can be a target UE; A method for determining a target UE in a UE-to-UE relay scenario, comprising:

2. The signal strength satisfies the first condition, The signal strength satisfies a first threshold requirement; or the signal strength continuing to meet the first threshold requirement for a first length of time. The method for determining a target UE in a UE-to-UE relay scenario according to claim 1 .

3. the first threshold is a minimum threshold, and the signal strength satisfying the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold; or the first threshold includes the minimum threshold and the maximum threshold, and the signal strength satisfying the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold and equal to or less than the maximum threshold; The method for determining a target UE in a UE-to-UE relay scenario according to claim 2 .

4. determining the first threshold and / or the first time period based on the second UE. The method for determining a target UE in a UE-to-UE relay scenario according to claim 2 or 3.

5. determining the first threshold and / or the first time length based on the second UE, receiving the first threshold and / or the first time length transmitted from the second UE; The method for determining a target UE in a UE-to-UE relay scenario according to claim 4 .

6. determining the first threshold and / or the first time length based on the second UE, determining a correspondence between a threshold and / or a time period and a service; receiving service indication information sent from the second UE; determining the first threshold value and / or the first time length based on the service instruction information and the correspondence relationship; The method for determining a target UE in a UE-to-UE relay scenario according to claim 4 .

7. the correspondence between the threshold value and / or the time length and the service is provided by at least one of a network side device, an upper layer, and an application layer; The method for determining a target UE in a UE-to-UE relay scenario according to claim 6 .

8. further comprising the step of including identification information of the target UE and / or measurement results of the target UE in a discovery signal. The method for determining a target UE in a UE-to-UE relay scenario according to any one of claims 1 to 7.

9. The measurement result is strength indication information, and the method includes: comparing a signal strength between the first UE and the target UE with a second threshold; and determining strength indication information of the target UE based on a comparison result between the signal strength between the first UE and the target UE and the second threshold. The method for determining a target UE in a UE-to-UE relay scenario according to claim 8 .

10. The step of including identification information of the target UE in the discovery signal comprises: including, according to the strength indication information of the target UE, an identification information of the target UE in a corresponding list in the discovery signal; The method for determining a target UE in a UE-to-UE relay scenario according to claim 9 .

11. The second threshold is provided by at least one of a network side device, an upper layer, an application layer, and the target UE. The method for determining a target UE in a UE-to-UE relay scenario according to claim 9 or 10.

12. A method for determining a target UE in a terminal device (UE)-to-UE relay scenario, the method being performed by a second UE, the method comprising: transmitting first information to a first UE for determining whether the second UE can be a target UE; A method for determining a target UE in a UE-to-UE relay scenario, comprising:

13. The first information is A first threshold value; a first duration; and and service indication information for determining the first threshold value and / or the first time period. The method for determining a target UE in a UE-to-UE relay scenario according to claim 12 .

14. The first information further includes a second threshold for determining strength indication information of the target UE. The method for determining a target UE in a UE-to-UE relay scenario according to claim 13 .

15. A method for determining a target UE in a terminal device (UE)-to-UE relay scenario, the method being performed by a network side device, the method comprising: transmitting second information to the first UE for determining a first threshold and / or a first length of time, the first threshold and / or the first length of time being for determining whether the second UE can be a target UE; The second UE is a neighbor UE of the first UE. A method for determining a target UE in a UE-to-UE relay scenario, comprising:

16. The second information is A threshold value and a correspondence relationship between the threshold value and a service; a time length and a correspondence between the time length and a service; The method for determining a target UE in a UE-to-UE relay scenario according to claim 15.

17. A communication device, a transceiver module for measuring signal strength between the first UE and the second UE; a processing module for determining that a second UE whose signal strength satisfies a first condition can be a target UE; A communication device comprising:

18. The signal strength satisfies the first condition, The signal strength satisfies a first threshold requirement; or the signal strength continuing to meet the first threshold requirement for a first length of time.

18. The communication device according to claim 17.

19. the first threshold is a minimum threshold, and the signal strength satisfying the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold; or the first threshold includes the minimum threshold and the maximum threshold, and the signal strength satisfying the first threshold requirement includes the signal strength being equal to or greater than the minimum threshold and equal to or less than the maximum threshold; 20. The communication device according to claim 18,

20. The device comprises: a transceiver module for determining the first threshold and / or the first time period based on the second UE.

20. A communication device according to claim 18 or 19.

21. The transceiver module is receiving the first threshold and / or the first time length transmitted from the second UE; 21. The communication device according to claim 20.

22. the processing module determines a correspondence between a threshold and / or a time period and a service; The transceiver module receives service indication information sent from the second UE; the processing module further determines the first threshold value and / or the first time length based on the service instruction information and the correspondence relationship.

21. The communication device according to claim 20.

23. the correspondence between the threshold value and / or the time length and the service is provided by at least one of a network side device, an upper layer, and an application layer; 23. The communication device of claim 22.

24. The transceiver module is including identification information of the target UE and / or measurement results of the target UE in a discovery signal; A communication device according to any one of claims 17 to 23.

25. the measurement result is strength instruction information, the processing module further comprising: comparing a signal strength between the first UE and the target UE with a second threshold; determining strength indication information of the target UE based on a comparison result between the signal strength between the first UE and the target UE and the second threshold; 25. The communication device of claim 24.

26. Including identification information of the target UE in the discovery signal including identification information of the target UE in a corresponding list in the discovery signal according to strength indication information of the target UE; 26. The communication device of claim 25.

27. The second threshold is provided by at least one of a network side device, an upper layer, an application layer, and the target UE.

27. A communication device according to claim 25 or 26.

28. A communication device, a transceiver module for transmitting first information to a first UE for determining whether the second UE can be a target UE; A communication device comprising:

29. The first information is A first threshold value; a first duration; and and service indication information for determining the first threshold value and / or the first time period.

29. The communication device of claim 28.

30. The first information further includes a second threshold for determining strength indication information of the target UE.

30. The communication device of claim 29.

31. A communication device, a transceiver module for transmitting second information to the first UE for determining a first threshold and / or a first length of time, the first threshold and / or the first length of time being for determining whether the second UE can be a target UE; The second UE is a neighbor UE of the first UE. A communication device comprising:

32. The second information is A threshold value and a correspondence relationship between the threshold value and a service; a time length and a correspondence between the time length and a service; 32. The communication device of claim 31 .

33. A communication device, a processor and a memory, a computer program stored in the memory, and the processor executes the computer program stored in the memory to cause the terminal device to perform the method according to any one of claims 1 to 11; A communication device comprising:

34. A communication device, a processor and a memory, A computer program is stored in the memory, and the processor executes the computer program stored in the memory to cause the terminal device to perform the method according to any one of claims 12 to 14. A communication device comprising:

35. A communication device, a processor and a memory, a computer program stored in the memory, the processor executing the computer program stored in the memory to cause the terminal device to perform the method according to claim 15 or 16; A communication device comprising:

36. A computer-readable storage medium having instructions stored thereon, When said instructions are executed, a method according to any one of claims 1 to 11 is achieved. A computer-readable storage medium comprising:

37. A computer-readable storage medium having instructions stored thereon, When said instructions are executed, a method according to any one of claims 12 to 14 is achieved. A computer-readable storage medium comprising:

38. A computer-readable storage medium having instructions stored thereon, When the instructions are executed, the method of claim 15 or 16 is implemented. A computer-readable storage medium comprising:

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