Relay processing method and device, terminal, and readable storage medium

Abstract

The present application discloses a relay processing method and apparatus, a terminal and a readable storage medium, which belong to the technical field of communication. The method includes a step of a first terminal performing a first operation based on a target content, the first operation being to trigger relay selection or relay reselection based on at least one of a first measurement result of a reference signal corresponding to a sidelink discovery message and a second measurement result of a reference signal corresponding to sidelink data.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority from Chinese Patent Application No. 202110349425.3, filed in China on March 31, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of communications, and in particular to a relay processing method and apparatus, a terminal, and a readable storage medium. [Background technology]

[0003] In relay selection or relay reselection, the execution of relay selection or relay reselection may be determined using a measurement situation based on a data reference signal and a measurement situation based on a discovery message. However, in the prior art, it is currently unclear whether to select the measurement situation based on the data reference signal or the measurement situation based on the discovery message as the basis for selecting or reselecting a relay terminal. Summary of the Invention

[0004] The embodiments of the present application provide a relay processing method and apparatus, a terminal, and a readable storage medium that can solve the problem in the prior art that it is still unclear at present whether to select measurement conditions based on data reference signals or measurement conditions based on discovery messages as the basis for selecting or reselecting a relay terminal.

[0005] In a first aspect, the method includes a step of a first terminal performing a first operation based on target content, the first operation being to trigger relay selection or relay reselection based on at least one of a first measurement result of a reference signal corresponding to a sidelink discovery message and a second measurement result of a reference signal corresponding to sidelink data, the target content being whether the first terminal and the relay terminal have established a direct communication interface (PC5) connection, whether there is data transmission, Available corresponding to the sidelink discovery message Reference Signal Whether or not there are measurement results, Available corresponding to the sidelink data Reference Signal Provided is a relay processing method including at least one of whether there is a measurement result, whether a discovery message can be received, reception of first instruction information from a network side device, reception of second instruction information from a counterpart terminal, a comparison result between the first measurement result and the second measurement result, a comparison result between the first measurement result and a first predetermined threshold, and a comparison result between the second measurement result and a second predetermined threshold.

[0006] In a second aspect, a relay processing device applied to a first terminal includes an execution module for performing a first operation based on target content, the first operation being to trigger relay selection or relay reselection based on at least one of a first measurement result of a reference signal corresponding to a sidelink discovery message and a second measurement result of a reference signal corresponding to sidelink data, the target content being based on whether the first terminal and a relay terminal have established a PC5 connection, whether there is data transmission, Available corresponding to the sidelink discovery message Reference Signal Whether or not there are measurement results, Available corresponding to the sidelink data Reference Signal Provided is a relay processing device that includes at least one of whether or not there is a measurement result, whether or not a discovery message can be received, reception of first instruction information from a network side device, reception of second instruction information from a remote terminal, a comparison result between the first measurement result and the second measurement result, a comparison result between the first measurement result and a first predetermined threshold, and a comparison result between the second measurement result and a second predetermined threshold.

[0007] In a third aspect, there is provided a terminal comprising a processor, a memory, and a program or command stored in the memory and executable on the processor, the program or command performing the steps of the method according to the first aspect when executed by the processor.

[0008] In a fourth aspect, a wireless communication system includes a processor for performing a first operation based on target content and a communication interface for obtaining resources for performing the first operation, the first operation being to trigger relay selection or relay reselection based on at least one of a first measurement result of a reference signal corresponding to a sidelink discovery message and a second measurement result of a reference signal corresponding to sidelink data, the target content being based on whether the first terminal and a relay terminal have established a PC5 connection, whether there is data transmission, Available corresponding to the sidelink discovery message Reference Signal Whether or not there are measurement results, Available corresponding to the sidelink data Reference Signal A terminal is provided that includes at least one of whether there is a measurement result, whether a discovery message can be received, reception of first instruction information from a network side device, reception of second instruction information from a counterpart terminal, a comparison result between the first measurement result and the second measurement result, a comparison result between the first measurement result and a first predetermined threshold, and a comparison result between the second measurement result and a second predetermined threshold.

[0009] In a fifth aspect, there is provided a readable storage medium having stored thereon a program or commands that, when executed by a processor, implements the steps of the method according to the first aspect.

[0010] In a sixth aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled together, the processor being configured to execute a program or command to implement the method according to the first aspect.

[0011] In a seventh aspect, there is provided a computer program / program product stored on a non-volatile storage medium and adapted to implement the steps of the method according to the first aspect when executed by at least one processor.

[0012] In the embodiment of the present application, whether the first terminal and the relay terminal have established a PC5 connection, whether there is data transmission, Available Responding to Sidelink Discovery Messages Reference Signal Whether or not there are measurement results, Available Supports sidelink data Reference Signal The basis for triggering relay selection or relay reselection based on the first measurement result of a reference signal corresponding to a sidelink discovery message or the second measurement result of a reference signal corresponding to sidelink data is determined based on whether there is a measurement result, whether a discovery message can be received, the reception of first instruction information from the network side device, the reception of second instruction information from the counterpart terminal, the comparison result between the first measurement result and the second measurement result, the comparison result between the first measurement result and the first predetermined threshold, and the comparison result between the second measurement result and the second predetermined threshold. In other words, the terminal can trigger relay selection or relay reselection under appropriate conditions, so that the terminal can transfer services between the network side device and the terminal via an appropriate relay. This solves the problem in the prior art that it is still unclear at present whether to select a relay terminal based on the measurement status based on the reference signal of data or the measurement status based on the discovery message. [Brief explanation of the drawings]

[0013] [Figure 1] 1 shows a block diagram of a wireless communication system to which embodiments of the present application can be applied. [Figure 2] FIG. 1 is a schematic diagram of sidelink transmission according to an embodiment of the present application; [Figure 3] FIG. 1 is a schematic diagram of a UE-to-network application scenario according to an embodiment of the present application; [Figure 4] 1 is a flowchart of a relay processing method according to an embodiment of the present application; [Figure 5] 1 is a structural schematic diagram of a relay processing device according to an embodiment of the present application; [Figure 6] 1 is a structural schematic diagram of a communication device according to an embodiment of the present application; [Figure 7] 1 is a structural schematic diagram of a terminal according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, the technical solutions in the embodiments of the present application will be clearly explained with reference to the drawings in the embodiments of the present application, and it should be understood that the described embodiments are only a part of the embodiments of the present application, not all of the embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments in the present application shall fall within the protection scope of the present application.

[0015] The terms "first," "second," etc. in the specification and claims of this application are not intended to describe a particular order or precedence order, but rather to distinguish between similar objects. It should be understood that terms used in this manner may be interchanged where appropriate so that the embodiments of this application can be implemented in an order other than that illustrated or described herein. Furthermore, the objects distinguished by "first" and "second" generally refer to one type and do not limit the number of objects; for example, the first object may be one or more. Furthermore, "and / or" in the specification and claims means at least one of the connected objects, and the " / " symbol generally means that the related objects before and after are in an "or" relationship.

[0016] It should be noted that the techniques described in the embodiments of this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but may 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), and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the techniques described may be used in other systems and wireless technologies in addition to those mentioned above. While the following description will discuss New Radio (NR) systems for illustrative purposes, and NR terminology is used in much of the following description, these technologies may also be used in other systems and wireless technologies, such as 6th Generation (6G) networks. th It can also be applied to applications other than NR system applications, such as 6G (Generation 6G) communication systems.

[0017] FIG. 1 shows a block diagram of a wireless communication system to which the embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be referred to as a terminal device or user equipment (UE), and may be a terminal-side device such as a mobile phone, a tablet personal computer, a laptop computer (also known as a notebook computer), a personal digital assistant (PDA), a personal digital assistant, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), a wearable device, a vehicle-mounted equipment (VUE), a pedestrian-mounted equipment (PUE), etc. Wearable devices include smart watches, wristbands, earphones, glasses, etc. It should be noted that the embodiments of the present application are not limited to a specific type of the terminal 11. The network side equipment 12 may be a base station or a core network, of which the base station may also be called an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (TRP), or any other appropriate term in the field, and as long as the same technical effect can be achieved, the base station is not limited to a specific technical term. It should be noted that the embodiments of this application only take the base station in an NR system as an example, but the specific type of the base station is not limited.

[0018] First, relevant terms used in this application will be explained.

[0019] 1. Sidelink explanation

[0020] Long Term Evolution (LTE) systems support sidelinks from release version 12 onwards. As shown in Figure 2, sidelinks allow end-user devices (UEs) to transmit data directly to each other without going through network equipment.

[0021] LTE Sidelink is designed for specific public safety applications (e.g., emergency communications at disaster sites such as fires or earthquakes) or vehicle-to-everything (V2X) communications. Vehicle-to-everything communications include a variety of services, such as basic security communications, advanced (autonomous) driving, platooning, and sensor expansion. Because LTE Sidelink only supports broadcast communications, it is primarily used for basic security communications. Other high-level V2X services with strict Quality of Service (QoS) requirements in terms of latency, reliability, etc. are supported by NR Sidelink.

[0022] 5G NR systems can operate in frequency bands above 6 GHz, which LTE does not support, and can support wider operating bandwidths. The Sidelink interface may also be referred to as the PC5 interface.

[0023] 2. Relay mechanism

[0024] Relay technology in wireless communication systems refers to adding one or more relay nodes between a base station and a terminal to forward wireless signals once or several times, meaning that wireless signals must travel multiple hops to reach a terminal. Wireless relay technology can not only be used to expand cell coverage and fill blind spots in cell coverage, but also to increase cell capacity by multiplexing spatial resources. For indoor coverage, relay technology can reduce penetration loss and improve indoor coverage quality.

[0025] Taking a simple two-hop relay as an example, wireless relaying splits one base station-terminal link into two links: base station-relay and relay-terminal, thereby replacing one low-quality link with two high-quality links, creating the possibility of obtaining higher link capacity and better coverage.

[0026] Currently, the relay supported in LTE is 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 is called a remote UE.

[0027] In the existing mechanism, as shown in Figure 3, a UE-to-network application scenario, a remote UE needs to transmit data to the network side, but due to insufficient coverage, a relay UE is used as a relay, where the cellular network communication interface (Uu interface) is between the relay UE and the base station, and the sidelink interface is between the relay UE and the remote UE. Generally, the relay UE is open and can provide services to any remote UE.

[0028] 3. Device selection and reselection

[0029] In LTE, relay UE selection or reselection occurs when a remote UE meets certain conditions. Current selection is primarily based on both the link between the UE and the base station and the signal quality on the sidelink. Currently, relay reselection is typically triggered when the remote UE determines that the sidelink discovery reference signal received power (SD-RSRP) measurement result is below a threshold, or by higher layers in the remote UE.

[0030] Hereinafter, with reference to the drawings, the relay processing method provided in the embodiments of the present application will be described in detail through several embodiments and its application scenarios.

[0031] As shown in FIG. 4, the steps of the relay processing method are as follows: Step 402 includes a first terminal performing a first operation based on the target content; wherein the first operation is to trigger relay selection or relay reselection based on at least one of a first measurement result of a reference signal corresponding to a sidelink discovery message and a second measurement result of a reference signal corresponding to sidelink data; The target content is whether the first terminal and the relay terminal have established a PC5 connection, whether there is data transmission, Available Responding to Sidelink Discovery Messages Reference Signal Whether or not there are measurement results, Available Supports sidelink data Reference Signal The information includes at least one of whether there is a measurement result, whether a discovery message can be received, reception of first instruction information from the network side device, reception of second instruction information from the counterpart terminal, a comparison result between the first measurement result and the second measurement result, a comparison result between the first measurement result and a first predetermined threshold, and a comparison result between the second measurement result and a second predetermined threshold.

[0032] As can be seen from step 402 above, whether the first terminal and the relay terminal have established a PC5 connection, whether there is data transmission, AvailableResponding to Sidelink Discovery Messages Reference Signal , Available Supports sidelink data Reference Signal At least one of the following contents can be used as the basis for triggering relay selection or relay reselection based on the first measurement result of a reference signal corresponding to the sidelink discovery message or the second measurement result of a reference signal corresponding to the sidelink data: whether a discovery message can be received, receipt of first instruction information from the network side device, receipt of second instruction information from the counterpart terminal, comparison result between the first measurement result and the second measurement result, comparison result between the first measurement result and the first predetermined threshold, and comparison result between the second measurement result and the second predetermined threshold. In other words, the terminal can trigger relay selection or relay reselection under appropriate conditions, so that the terminal can transfer services between the network side device and the terminal via an appropriate relay. This solves the problem in the prior art that it is still unclear at present whether to select or reselect a relay terminal based on the measurement status based on the reference signal of data or the measurement status based on the discovery message.

[0033] It should be noted that the first terminal in the embodiment of the present application may be a remote terminal of a relay terminal, the first measurement result based on a reference signal corresponding to a sidelink discovery message in the embodiment of the present application may be a measurement result based on SD-RSRP, and the second measurement result based on a reference signal corresponding to sidelink data may be a measurement result of sidelink reference signal received power (SL-RSRP).

[0034] In an optional embodiment of the present application example, the manner in which the first terminal performs the first operation based on the target content mentioned in step 402 may further include one of the following steps 402-11 and 402-12.

[0035] In step 402-11, when the first terminal and the relay terminal establish a PC5 connection, the first terminal triggers relay selection or relay reselection based on the second measurement result; Here, for step 402-11, in a specific implementation process of triggering relay selection or relay reselection based on the second measurement result, if the second measurement result is greater than or equal to a first predetermined value, relay selection may be performed, and if the second measurement result is less than or equal to the first predetermined value, relay reselection may be performed.

[0036] In step 402-12, when the first terminal and the relay terminal establish a PC5 connection, the first terminal triggers relay selection or relay reselection based on the first measurement result and the second measurement result.

[0037] Here, in the specific implementation process of step 402-11, in which the first terminal triggers relay selection or relay reselection based on the first measurement result and the second measurement result, the following 1) and 2) may be performed:

[0038] 1) At least one of the first measurement result and the second measurement result satisfies the threshold condition, for example, in the first case, the first measurement result or the second measurement result is greater than or equal to the second predetermined threshold, and in the second case, the first measurement result is greater than or equal to the third predetermined threshold, or the second measurement result is greater than or equal to the third predetermined threshold, or both the first measurement result and the second measurement result are greater than or equal to the third predetermined threshold.

[0039] 2) Both the first measurement result and the second measurement result satisfy the threshold condition, for example, both the first measurement result and the second measurement result are greater than or equal to the second predetermined threshold, the first measurement result is greater than or equal to the third predetermined threshold, and the second measurement result is greater than or equal to the third predetermined threshold.

[0040] It should be noted that, in the above step of triggering relay selection or relay reselection based on the first and second measurement results, relay selection is performed if the first or second measurement result is equal to or greater than a second predetermined value, and relay reselection is performed if the first or second measurement result is equal to or less than the second predetermined value. The same process is performed for the third predetermined threshold.

[0041] The PC5 connection referred to in the embodiments of the present application may refer to a PC5-S connection, a PC5-Radio Resource Control (RRC) connection, etc.

[0042] In an optional embodiment of the embodiment of the present application, when the first terminal and the relay terminal establish a PC5 connection and there is no service data transmission, the method of the embodiment of the present application: Step 404 in which the first terminal stops evaluating relay selection or relay reselection; and step 406 in which the first terminal receives a packet transmitted from the relay terminal, the packet being for measurement of a reference signal corresponding to the sidelink data by the first terminal.

[0043] In another alternative embodiment of the present application, the manner in which the first terminal performs the first operation based on the target content referred to in step 402 is: Step 402-21, in which the first terminal triggers relay selection or relay reselection based on the second measurement result if there is data transmission; Step 402-22, in which the first terminal triggers relay selection or relay reselection based on the first measurement result and the second measurement result if there is data transmission; and step 402-23, in which the first terminal triggers relay selection or relay reselection based on the first measurement result if there is no data transmission.

[0044] As can be seen from the above steps 402-21 to 402-23, relay selection or relay reselection can be triggered based on the first or second measurement result when data is available or unavailable. In a specific application scenario, it is preferable that the first terminal triggers relay selection when the first or second measurement result is equal to or greater than a fourth predetermined value, and triggers relay reselection when the first or second measurement result is equal to or less than a fifth predetermined value. In other words, the first terminal can trigger relay selection or relay reselection under appropriate conditions so that the first terminal and the network side device can communicate via an appropriate relay.

[0045] Based on the above steps 402-21 and 402-23, the discovery message transmission method in the embodiment of the present application includes one of the following: a method of periodically transmitting a discovery message between the first terminal and the relay terminal; and a method of transmitting a discovery message only when there is no data.

[0046] In another alternative embodiment of the present application, the manner in which the first terminal performs the first operation based on the target content referred to in step 402 is: Available Supports sidelink data Reference Signal step 402-31, in which the first terminal triggers relay selection or relay reselection based on the second measurement result if there is a Available Supports sidelink data Reference Signal If there is no such measurement result, the first terminal triggers relay selection or relay reselection based on the first measurement result in step 402-32.

[0047] As a result, as can be seen from steps 402-31 to 402-32, Available Supports sidelink data Reference SignalThe relay selection or relay reselection can also be triggered based on the first measurement result and the second measurement result, depending on whether or not there is a relay. If the first measurement result or the second measurement result is equal to or greater than a sixth predetermined value, relay selection is performed, and if the first measurement result or the second measurement result is equal to or less than the sixth predetermined value, relay reselection is performed. The seventh predetermined threshold is processed in a similar manner. In other words, the first terminal can trigger relay selection or relay reselection under appropriate conditions so that the first terminal and the network side device can communicate via an appropriate relay.

[0048] Regarding the above steps 402-31 to 402-32, the transmission method of the discovery message in the embodiment of the present application is: 1) a method of periodically transmitting the discovery message between the first terminal and the relay terminal; and 2) Available Supports sidelink data Reference Signal and a method for transmitting a discovery message when there is no

[0049] In another alternative embodiment of the present application, the manner in which the first terminal performs the first operation based on the target content referred to in step 402 is: Available Responding to Sidelink Discovery Messages Reference Signal a step 402-41 in which the first terminal triggers relay selection or relay reselection based on the first measurement result if there is a Available Responding to Sidelink Discovery Messages Reference Signal If there is no such measurement result, the first terminal triggers relay selection or relay reselection based on the second measurement result.

[0050] As a result, as can be seen from steps 402-41 to 402-42, Available Responding to Sidelink Discovery Messages Reference SignalThe first terminal can further trigger relay selection or relay reselection based on the first measurement result and the second measurement result, depending on whether there is a relay or not. If the first measurement result or the second measurement result is equal to or greater than an eighth predetermined value, relay selection is performed, and if the first measurement result or the second measurement result is equal to or less than the eighth predetermined value, relay reselection is performed. The same process is performed for the ninth predetermined threshold. In other words, the first terminal can trigger relay selection or relay reselection under appropriate conditions so that the first terminal and the network side device can communicate via an appropriate relay.

[0051] In another alternative embodiment of the present application, the manner in which the first terminal performs the first operation based on the target content referred to in step 402 is: a step 402-51 in which the first terminal triggers relay selection or relay reselection based on the first measurement result if the discovery message is received; The method may further include step 402-52, in which the first terminal triggers relay selection or relay reselection based on the second measurement result if the discovery message is not received.

[0052] As can be seen from the above, in the present application, relay selection or relay reselection can also be triggered using corresponding measurement results depending on whether a discovery message is received, and the specific relay selection or relay reselection is the same as the other methods of triggering relay selection or relay reselection described above.

[0053] It should be noted that in an alternative embodiment of the present application, if the first terminal does not receive a reference signal corresponding to the discovery message and a reference signal corresponding to the data, the first terminal stops evaluating relay selection or relay reselection.

[0054] In another optional embodiment of the embodiment of the present application, the first instruction information in the embodiment of the present application is for instructing one of: triggering relay selection or relay reselection based on a first measurement result, or triggering relay selection or relay reselection based on a second measurement result; triggering relay selection or relay reselection based on the first measurement result, or triggering relay selection or relay reselection based on the second measurement result and the first measurement result.

[0055] As can be seen from the above, in the embodiment of the present application, the first terminal can determine whether the trigger for relay selection or relay reselection is based on the second measurement result or the first measurement result, or based on the second measurement result and the first measurement result, according to the received first indication information, where the first indication information sent from the network side device corresponds to at least one of a source ID and destination ID pair, a destination ID, a unicast link ID, a terminal, a service type, and a group ID in groupcast.

[0056] For example, if the first indication information corresponds to a pair of source ID and destination ID, it can be understood that the first indication information is for indicating the ID pair, that is, the source ID and destination ID pair needs to trigger relay selection or relay reselection based on the second measurement result or the first measurement result, or based on the second measurement result and the first measurement result. The same process is performed for other IDs or service types.

[0057] In another optional embodiment of the embodiment of the present application, the second instruction information in the embodiment of the present application is for instructing one of: triggering relay selection or relay reselection based on the first measurement result, or triggering relay selection or relay reselection based on the second measurement result; triggering relay selection or relay reselection based on the first measurement result, or triggering relay selection or relay reselection based on the first measurement result and the second measurement result.

[0058] As can be seen from the above, the second instruction information sent from the remote terminal can also directly indicate whether the trigger for relay selection or relay reselection is based on the second measurement result or the first measurement result, or on the second measurement result and the first measurement result.

[0059] In another alternative embodiment of the present application, the manner in which the first terminal performs the first operation based on the target content referred to in step 402 is: Step 402-61, in which the first terminal triggers relay selection or relay reselection based on the first measurement result if the first measurement result is equal to or greater than a first predetermined threshold and the second measurement result is less than a second predetermined threshold; a step 402-62 in which the first terminal triggers relay selection or relay reselection based on the second measurement result if the first measurement result is less than a first predetermined threshold and the second measurement result is equal to or greater than a second predetermined threshold; and step 402-63, in which the first terminal triggers relay selection or relay reselection if the first measurement result is greater than or equal to a first predetermined threshold and the second measurement result is greater than or equal to a second predetermined threshold.

[0060] As can be seen from the above steps 402-61 to 402-63, relay selection or relay reselection can be triggered based on the measurement result being equal to or greater than a threshold. It should be noted that the above steps 402-61 to 402-63 are parallel steps, and it is sufficient if one of them satisfies the condition, i.e., after comparing the measurement result with the threshold, relay selection or relay reselection is triggered if the measurement result is equal to or greater than the threshold or less than the threshold.

[0061] In another alternative embodiment of the present application, the manner in which the first terminal performs the first operation based on the target content referred to in step 402 is: a step 402-71 in which the first terminal triggers relay selection or relay reselection based on the second measurement result if the first measurement result is equal to or greater than the second measurement result; a step 402-72 in which the first terminal triggers relay selection or relay reselection based on the first measurement result if the first measurement result is less than the second measurement result; a step 402-73 in which the first terminal triggers relay selection or relay reselection based on the second measurement result if the first measurement result is less than or equal to the second measurement result; and step 402-74, in which the first terminal triggers relay selection or relay reselection based on the first measurement result if the first measurement result is greater than the second measurement result.

[0062] As can be seen from the above steps 402-71 to 402-74, relay selection or relay reselection can be triggered based on the comparison result between the first measurement result and the second measurement result. It should be noted that the above steps 402-71 to 402-74 are parallel steps, and it is sufficient that one of them satisfies a condition, that is, after comparing the measurement results, if the first measurement result is greater than or less than the second measurement result, relay selection or relay reselection is triggered.

[0063] In another alternative embodiment of the present application, the manner in which the first terminal performs the first operation based on the target content referred to in step 402 is: a step 402-81 in which the first terminal triggers relay selection or relay reselection if at least one of the first measurement result and the second measurement result is greater than or equal to a third predetermined threshold; and step 402-82, in which the first terminal triggers relay selection or relay reselection if both the first measurement result and the second measurement result are equal to or greater than a fourth predetermined threshold.

[0064] The third predetermined threshold in the above steps 402-81 and 402-82 may be two thresholds, i.e., when the third predetermined threshold includes two thresholds, one for comparison with the first measurement result and one for comparison with the second measurement result, respectively, and the first measurement result and the second measurement result are compared with another predetermined threshold.

[0065] In another alternative embodiment of the present application, the manner in which the first terminal performs the first operation based on the target content referred to in step 402 is: a step 402-91 in which the first terminal triggers relay selection or relay reselection if at least one of the first measurement result and the second measurement result is less than or equal to a fifth predetermined threshold; and step 402-92, in which the first terminal triggers relay selection or relay reselection if both the first measurement result and the second measurement result are less than or equal to a sixth predetermined threshold.

[0066] The fifth predetermined threshold in the above steps 402-91 and 402-92 may be two thresholds, i.e., when the fifth predetermined threshold includes two thresholds, one for comparison with the first measurement result and one for comparison with the second measurement result, respectively, and the first measurement result and the second measurement result are compared with another predetermined threshold.

[0067] In the following, the triggering method for relay selection or relay reselection of the present application will be described using an example in which the first measurement result based on a reference signal corresponding to a sidelink discovery message may be a measurement result based on SD-RSRP, and the second measurement result based on a reference signal corresponding to sidelink data may be a measurement result based on SL-RSRP.

[0068] Optional embodiment 1 When SL-RSRP is used in relay selection, the method steps in this alternative embodiment include: Step 501: a remote UE and a relay UE establish a unicast link to perform non-relay related services; Step 502: the remote UE determines to select a relay to perform subsequent service based on the criteria, and when there is a relay evaluated as suitable, if at least one of the SL-RSRP and SD-RSRP of the relay UE is measured to meet the threshold condition, the remote UE selects the relay UE1 as a suitable relay; At least one of the SL-RSRP and the SD-RSRP meeting a threshold condition may mean that the SD-RSRP>=TH1 or the SL-RSRP>=TH2, where TH1 is a first threshold and TH2 is a second threshold; Step 503 includes the remote UE communicating with the subsequent base station based on the relay UE forwarding.

[0069] Optional embodiment 2 When using SL-RSRP+SD-RSRP in relay reselection, the method steps in this alternative embodiment include: Step 601, in which a remote UE determines based on a criterion to select a relay to perform service communication with a base station; Step 602: the remote UE selects an appropriate relay UE based on SD-RSRP and establishes a unicast link with the relay UE; Step 603, in which the remote UE measures SL-RSRP when receiving data from the relay UE, and the remote UE can also receive discovery messages from the relay UE to measure SD-RSRP; Step 604, in which the remote UE triggers a relay reselection process if both the SD-RSRP and the SL-RSRP do not meet the threshold condition.

[0070] Here, when reselecting a relay UE, the remote UE determines whether it can select a new candidate relay UE using only SD-RSRP, or whether it can select a new candidate relay UE using SD-RSRP+SL-RSRP.

[0071] It should be noted that the execution entity of the relay processing method provided in the embodiment of the present application may be a relay processing device, or may be a control module for executing the relay processing method within the relay processing device. In the embodiment of the present application, the relay processing device provided in the embodiment of the present application will be described taking as an example that the relay processing device executes the relay processing method.

[0072] As shown in FIG. 5, the embodiment of the present application further provides a relay processing device applied to the first terminal, the relay processing device comprising: an execution module (52) for performing a first operation based on the target content; wherein the first operation is to trigger relay selection or relay reselection based on at least one of a first measurement result of a reference signal corresponding to a sidelink discovery message and a second measurement result of a reference signal corresponding to sidelink data; The target content is whether the first terminal and the relay terminal have established a PC5 connection, whether there is data transmission, Available Responding to Sidelink Discovery Messages Reference Signal Whether or not there are measurement results, Available Supports sidelink data Reference Signal The information includes at least one of whether there is a measurement result, whether a discovery message can be received, reception of first instruction information from the network side device, reception of second instruction information from the counterpart terminal, a comparison result between the first measurement result and the second measurement result, a comparison result between the first measurement result and a first predetermined threshold, and a comparison result between the second measurement result and a second predetermined threshold.

[0073] According to the device of the embodiment of the present application, whether the first terminal and the relay terminal have established a PC5 connection, whether there is data transmission, Available Responding to Sidelink Discovery Messages Reference Signal Whether or not there are measurement results , available Supports sidelink data Reference Signal At least one of the following contents can be used as the basis for triggering relay selection or relay reselection based on the first measurement result of a reference signal corresponding to a sidelink discovery message or the second measurement result of a reference signal corresponding to sidelink data: whether there is a measurement result; whether a discovery message can be received; receipt of first instruction information from the network side device; receipt of second instruction information from the counterpart terminal; comparison of the first measurement result with the second measurement result with the first predetermined threshold; and comparison of the second measurement result with the second predetermined threshold. In other words, the terminal can trigger relay selection or relay reselection under appropriate conditions, so that the terminal can transfer services between the network side device and the terminal via an appropriate relay. This solves the problem in the prior art that it is still unclear at present whether to select or reselect a relay terminal based on the measurement status based on the reference signal of data or the measurement status based on the discovery message.

[0074] Optionally, the execution module 52 in the embodiment of the present application may include: a first trigger unit for triggering relay selection or relay reselection based on the second measurement result when the first terminal and the relay terminal establish a PC5 connection; and a second trigger unit for triggering relay selection or relay reselection based on the first measurement result and the second measurement result when the first terminal and the relay terminal establish a PC5 connection.

[0075] Optionally, when the first terminal and the relay terminal establish a PC5 connection and there is no service data transmission, the device in the embodiment of the present application may: a first stopping module for stopping evaluation of relay selection or relay reselection; a receiving module for receiving a transmitted packet of the relay terminal, the packet being for measurement of a reference signal corresponding to sidelink data by the first terminal.

[0076] Optionally, the execution module 52 in the embodiment of the present application may include: a third triggering unit for triggering relay selection or relay reselection based on the second measurement result when there is data transmission; a fourth trigger unit for triggering relay selection or relay reselection based on the first measurement result and the second measurement result when there is data transmission; a fifth triggering unit for triggering relay selection or relay reselection based on the first measurement result when there is no data transmission.

[0077] Optionally, the method of transmitting the discovery message in the embodiment of the present application includes one of the following: a method of periodically transmitting the discovery message between the first terminal and the relay terminal; and a method of transmitting the discovery message only when there is no data.

[0078] Optionally, the execution module 52 in the embodiment of the present application may include: Available Supports sidelink data Reference Signal a sixth triggering unit for triggering relay selection or relay reselection based on the second measurement result if there is a Available Supports sidelink data Reference Signal and a seventh triggering unit for triggering relay selection or relay reselection based on the first measurement result if there is no relay selection or reselection based on the first measurement result.

[0079] Optionally, the discovery message transmission method in the embodiment of the present application may include: periodically transmitting the discovery message between the first terminal and the relay terminal; Available Supports sidelink data Reference Signal and a method for transmitting a discovery message when there is no

[0080] Optionally, the execution module 52 in the embodiment of the present application may include: Available Responding to Sidelink Discovery Messages Reference Signal an eighth triggering unit for triggering relay selection or relay reselection based on the first measurement result if there is Available Responding to Sidelink Discovery Messages Reference Signal and a ninth triggering unit for triggering relay selection or relay reselection based on the second measurement result if there is no second measurement result.

[0081] Optionally, the execution module 52 in the embodiment of the present application may further be used to perform the following: when a discovery message is received, the first terminal triggers relay selection or relay reselection based on a first measurement result; and when a discovery message is not received, the first terminal triggers relay selection or relay reselection based on a second measurement result.

[0082] Optionally, the device in the embodiment of the present application may further include a second stop module for stopping evaluation of relay selection or relay reselection when a reference signal corresponding to the discovery message and a reference signal corresponding to the data are not received.

[0083] Optionally, the first instruction information in the embodiment of the present application is: 1) triggering relay selection or relay reselection based on a first measurement result, or triggering relay selection or relay reselection based on a second measurement result; 2) to instruct one of triggering relay selection or relay reselection based on the first measurement result, or triggering relay selection or relay reselection based on the second measurement result and the first measurement result.

[0084] Optionally, the first indication information in the embodiment of the present application corresponds to at least one of a pair of a source ID and a destination ID, a destination ID, a unicast link ID, a terminal, a service type, and a group ID in groupcast.

[0085] Optionally, the second instruction information in the embodiment of the present application is: 1) triggering relay selection or relay reselection based on a first measurement result, or triggering relay selection or relay reselection based on a second measurement result; 2) to instruct one of triggering relay selection or relay reselection based on the first measurement result, or triggering relay selection or relay reselection based on the first measurement result and the second measurement result.

[0086] Optionally, the execution module 52 in the embodiment of the present application may include: a tenth trigger unit for triggering relay selection or relay reselection based on the first measurement result when the first measurement result is equal to or greater than a first predetermined threshold and the second measurement result is less than a second predetermined threshold; an eleventh trigger unit for triggering relay selection or relay reselection based on the second measurement result when the first measurement result is less than a first predetermined threshold and the second measurement result is equal to or greater than a second predetermined threshold; and a twelfth trigger unit for triggering relay selection or relay reselection when the first measurement result is greater than or equal to a first predetermined threshold and the second measurement result is greater than or equal to a second predetermined threshold.

[0087] Optionally, the execution module 52 in the embodiment of the present application may include: a thirteenth trigger unit for triggering relay selection or relay reselection based on the second measurement result when the first measurement result is equal to or greater than the second measurement result; a fourteenth trigger unit for triggering relay selection or relay reselection based on the first measurement result when the first measurement result is less than the second measurement result; a fifteenth trigger unit for triggering relay selection or relay reselection based on the second measurement result when the first measurement result is less than or equal to the second measurement result; and a sixteenth trigger unit for triggering relay selection or relay reselection based on the first measurement result if the first measurement result is greater than the second measurement result.

[0088] Optionally, the execution module 52 in the embodiment of the present application may include: a seventeenth trigger unit for triggering relay selection or relay reselection when at least one of the first measurement result and the second measurement result is greater than or equal to a third predetermined threshold; and an eighteenth trigger unit for triggering relay selection or relay reselection when both the first measurement result and the second measurement result are equal to or greater than a fourth predetermined threshold.

[0089] Optionally, the execution module 52 in the embodiment of the present application may include: a nineteenth trigger unit for triggering relay selection or relay reselection when at least one of the first measurement result and the second measurement result is less than or equal to a fifth predetermined threshold; and a twentieth trigger unit for triggering relay selection or relay reselection when both the first measurement result and the second measurement result are less than or equal to the sixth predetermined threshold.

[0090] The relay processing device in the embodiments of the present application may be a device, a device having an operating system, or electronic equipment, or may be a component, integrated circuit, or chip within a terminal. The device or electronic equipment may be a portable terminal or a non-portable terminal. For example, the portable terminal may include, but is not limited to, the types of remote terminal 11 listed above, and the non-portable terminal may be, for example, a server, a network-attached storage (NAS), a personal computer (PC), a television (TV), an automated teller machine (ATM), a kiosk, etc., and is not specifically limited in the embodiments of the present application.

[0091] The relay processing device provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 4 and achieve similar technical effects, and detailed descriptions will be omitted here to avoid duplication.

[0092] Optionally, as shown in FIG. 6 , an embodiment of the present application further provides a communication device 600. The communication device 600 includes a processor 601, a memory 602, and a program or command stored in the memory 602 and executable on the processor 601. For example, if the communication device 600 is a terminal, the processor 601 executes the program or command to realize the processes of the embodiment of the relay processing method, thereby achieving similar technical effects. If the communication device 600 is a network-side device, the processor 601 executes the program or command to realize the processes of the embodiment of the relay processing method, thereby achieving similar technical effects. To avoid repetition, detailed descriptions will be omitted here.

[0093] An embodiment of the present application further provides a terminal comprising: a processor for performing a first operation based on a target content; and a communication interface for obtaining resources for performing the first operation, where the first operation is triggering relay selection or relay reselection based on at least one of a first measurement result of a reference signal corresponding to a sidelink discovery message and a second measurement result of a reference signal corresponding to sidelink data; The target content is whether the first terminal and the relay terminal have established a PC5 connection, whether there is data transmission, Available Responding to Sidelink Discovery Messages Reference Signal Whether or not there are measurement results, Available Supports sidelink data Reference Signal The information includes at least one of whether there is a measurement result, whether a discovery message can be received, reception of first instruction information from the network side device, reception of second instruction information from the counterpart terminal, a comparison result between the first measurement result and the second measurement result, a comparison result between the first measurement result and a first predetermined threshold, and a comparison result between the second measurement result and a second predetermined threshold.

[0094] This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and the implementation processes and realization forms of the above-mentioned method embodiments are all applicable to this terminal embodiment, and can achieve the same technical effects. Specifically, Figure 7 is a schematic diagram of the hardware structure of a terminal that implements the embodiment of the present application.

[0095] The terminal 100 includes at least some components such as, but not limited to, a radio frequency unit 101, a network module 102, an audio output unit 103, an input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, and a processor 110.

[0096] Those skilled in the art will understand that the terminal 100 may further include a power source (e.g., a battery) for powering each component, and the power source may be logically connected to the processor 110 through a power management system, which may further realize functions such as charge / discharge management and power consumption management. The structure of the terminal shown in Figure 7 is not intended to limit the terminal, and the terminal may include more or fewer components than those shown in Figure 7, or a combination of some components, or a different component arrangement, and detailed descriptions thereof will be omitted here.

[0097] It should be understood that in the embodiment of the present application, the input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042 for processing image data of still or video images captured by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 106 may include a display panel 1061, which may be arranged in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like. The user input unit 107 includes a touch panel 1071 and other input devices 1072. The touch panel 1071 is also called a touch screen. The touch panel 1071 may include two parts: a touch detection device and a touch controller. The other input devices 1072 may include, but are not limited to, a physical keyboard, function buttons (e.g., volume control buttons, switch buttons, etc.), a trackball, a mouse, and a control lever, and detailed description thereof will be omitted here.

[0098] In the embodiment of the present application, the high frequency unit 101 receives downlink data from the network side device, processes the data in the processor 110, and transmits uplink data to the network side device. Typically, the high frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a receiver / transmitter, a coupler, a low-noise amplifier, a duplexer, etc.

[0099] The memory 109 can be used to store software programs or commands and various data. The memory 109 may primarily include a program or command storage area capable of storing an operating system, an application or command required for at least one function (e.g., audio playback function, image playback function, etc.), and a data storage area. The memory 109 may also include high-speed random access memory and may further include nonvolatile memory. Here, the nonvolatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory, such as at least one disk storage device, flash memory device, or other nonvolatile solid-state storage device.

[0100] The processor 110 may include one or more processing units. Optionally, the processor 110 may integrate an application processor that mainly processes an operating system, a user interface, and applications or commands, and a modem processor that mainly processes wireless communications, such as a baseband processor. It is understood that the modem processor does not have to be integrated into the processor 110.

[0101] wherein the processor 110 is used to perform a first operation based on the target content; wherein the first operation is to trigger relay selection or relay reselection based on at least one of a first measurement result of a reference signal corresponding to a sidelink discovery message and a second measurement result of a reference signal corresponding to sidelink data; The target content is whether the first terminal and the relay terminal have established a PC5 connection, whether there is data transmission, Available Responding to Sidelink Discovery Messages Reference Signal Whether there is Available Supports sidelink data Reference Signal whether a discovery message can be received; reception of first instruction information from the network side device; reception of second instruction information from the counterpart terminal; a comparison result between the first measurement result and the second measurement result; a comparison result between the first measurement result and a first predetermined threshold; and a comparison result between the second measurement result and a second predetermined threshold.

[0102] Optionally, the processor 110 further comprises: Triggering relay selection or relay reselection based on the second measurement result when the first terminal and the relay terminal establish a PC5 connection; When the first terminal and the relay terminal establish a PC5 connection, the relay terminal is used to perform one of the steps of triggering relay selection or relay reselection based on the first measurement result and the second measurement result.

[0103] Optionally, the processor 110 further comprises: when the first terminal and the relay terminal have established a PC5 connection and there is no service data transmission: the first terminal ceasing evaluation of relay selection or relay reselection; a step of the first terminal receiving a transmitted packet of the relay terminal, the packet being for measuring a reference signal corresponding to sidelink data by the first terminal.

[0104] Optionally, the processor 110 further comprises: When there is data transmission, the first terminal triggers relay selection or relay reselection based on the second measurement result; When there is data transmission, the first terminal triggers relay selection or relay reselection based on the first measurement result and the second measurement result; and when there is no data transmission, the first terminal triggers relay selection or relay reselection based on the first measurement result.

[0105] Optionally, the processor 110 further comprises: Available Supports sidelink data Reference Signal if so, the first terminal triggers relay selection or relay reselection based on the second measurement result; Available Supports sidelink data Reference Signal if there is no such measurement result, the first terminal triggers relay selection or relay reselection based on the first measurement result.

[0106] Optionally, the processor 110 further comprises: Available Responding to Sidelink Discovery Messages Reference Signal if there is a first terminal triggering relay selection or relay reselection based on the first measurement result; Available Responding to Sidelink Discovery Messages Reference Signal if not, the first terminal triggers relay selection or relay reselection based on the second measurement result.

[0107] Optionally, the processor 110 further comprises: triggering relay selection or relay reselection by the first terminal based on a first measurement result when receiving the discovery message; if the discovery message is not received, the first terminal triggers relay selection or relay reselection based on the second measurement result.

[0108] Optionally, the processor 110 further comprises: When the first measurement result is equal to or greater than a first predetermined threshold and the second measurement result is less than a second predetermined threshold, the first terminal triggers relay selection or relay reselection based on the first measurement result; When the first measurement result is less than a first predetermined threshold and the second measurement result is equal to or greater than a second predetermined threshold, the first terminal triggers relay selection or relay reselection based on the second measurement result; and when the first measurement result is greater than or equal to a first predetermined threshold and the second measurement result is greater than or equal to a second predetermined threshold, the first terminal triggers relay selection or relay reselection.

[0109] Optionally, the processor 110 further comprises: If the first measurement result is greater than or equal to the second measurement result, the first terminal triggers relay selection or relay reselection based on the second measurement result; If the first measurement result is less than the second measurement result, the first terminal triggers relay selection or relay reselection based on the first measurement result; If the first measurement result is less than or equal to the second measurement result, the first terminal triggers relay selection or relay reselection based on the second measurement result; if the first measurement result is greater than the second measurement result, the first terminal triggers relay selection or relay reselection based on the first measurement result.

[0110] Optionally, the processor 110 further comprises: triggering relay selection or relay reselection by the first terminal when at least one of the first measurement result and the second measurement result is greater than or equal to a third predetermined threshold; and the first terminal triggering relay selection or relay reselection when both the first measurement result and the second measurement result are equal to or greater than a fourth predetermined threshold.

[0111] Optionally, the processor 110 further comprises: triggering relay selection or relay reselection by the first terminal when at least one of the first measurement result and the second measurement result is less than or equal to a fifth predetermined threshold; and the first terminal triggering relay selection or relay reselection if both the first measurement result and the second measurement result are below the sixth predetermined threshold.

[0112] The embodiments of the present application further provide a readable storage medium, which stores a program or command, and when the program or command is executed by a processor, the processes of the above-mentioned relay processing method embodiments are realized, and similar technical effects can be achieved. To avoid repetition, detailed descriptions are omitted here.

[0113] The processor may be a processor within the terminal described in the above embodiment. The readable storage medium may include 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.

[0114] The embodiments of the present application further provide a chip, which includes a processor and a communication interface, and the communication interface and the processor are coupled together, and the processor executes programs or commands to implement the processes of the embodiments of the relay processing method, thereby achieving similar technical effects. To avoid repetition, detailed descriptions are omitted here.

[0115] It should be understood that the chips referred to in the embodiments of this application may also be referred to as system level chips, system chips, chip systems, or system-on-chips, etc.

[0116] The embodiments of the present application further provide a computer program product, which is stored in a non-volatile storage medium, and when executed by at least one processor, the computer program product realizes the processes of the above-mentioned relay processing method embodiments, and can achieve similar technical effects. To avoid repetition, detailed descriptions are omitted here.

[0117] It should be noted that, as used herein, the terms "comprise," "consist of," or any other variation thereof, are intended to include a non-exclusive inclusion, whereby a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not expressly specified or inherent in such process, method, article, or apparatus. Unless otherwise specified, elements qualified by the phrase "comprise..." do not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element. It should also be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may include performing functions substantially simultaneously or in the reverse order, depending on such functionality. For example, the described method may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to one example may be combined in other examples.

[0118] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be realized in the form of a combination of software and a necessary common hardware platform, and of course, they can also be realized by hardware, but in many cases the former is a more preferred embodiment. Based on this view, the technical solutions of the present application can be substantially embodied in the form of a software product, and the computer software product is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes a plurality of commands that cause a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0119] Although the examples of the present application have been described above with reference to the drawings, the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative and not limiting. Based on the suggestions of the present application, many forms that a person skilled in the art can make without departing from the spirit of the present application and the scope of protection of the claims are all within the scope of protection of the present application.

Claims

1. The first terminal performs a first operation based on the target content; the first operation is to trigger relay reselection based on at least one of a first measurement result of a reference signal corresponding to a sidelink discovery message and a second measurement result of a reference signal corresponding to sidelink data; the target content includes whether there are reference signal measurements corresponding to the available sidelink data; The step of the first terminal performing a first operation based on the target content includes: performing the relay reselection if the first measurement result is less than or equal to a sixth predetermined threshold; The step of the first terminal performing the first operation based on the target content further includes: triggering, by the first terminal, the relay reselection based on the second measurement result if there is a reference signal corresponding to the sidelink data available; triggering, by the first terminal, the relay reselection based on the first measurement result if there is no reference signal corresponding to the sidelink data available; Including, The method of transmitting the discovery message is as follows: transmitting the discovery message when there is no available reference signal corresponding to the sidelink data; A relay processing method comprising:

2. A terminal comprising a processor, a memory, and programs or commands stored in said memory and executable on said processor, said programs or commands, when executed by said processor, implementing the steps of the method of claim 1.

3. A readable storage medium having stored thereon a program or command that, when executed by a processor, implements the steps of the method of claim 1.

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