Access method, device and electronic equipment of communication link

Abstract

Embodiments of the present application provide a communication link access method and device, electronic equipment and computer readable storage medium, and relate to the field of communication. The method comprises: obtaining a communication quality parameter of a first communication link; if the communication quality parameter meets a preset condition, starting multipath measurement; wherein the communication quality parameter comprises one or more communication quality parameters related to one or more of a first user equipment logical channel, a data link layer and service data. Embodiments of the present application realize relay discovery and measurement of multiple communication links, better meet the needs of service transmission, and improve user experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a communication link access method and device and electronic equipment. BACKGROUND

[0002] For a relay scenario, in order to improve transmission rate or reliability, a user equipment (UE) can communicate with a base station or a target UE through multiple paths.

[0003] For example, in a U2N relay scenario, a remote UE communicates with a base station through a direct Uu link and a non-direct communication link of a U2N relay at the same time, or a remote UE communicates with a base station through multiple non-direct communication links of U2N relays at the same time.

[0004] In a U2U relay scenario, two UEs communicate through a direct SL link and a non-direct communication link of a U2U relay at the same time, or two UEs communicate through multiple non-direct communication links of U2U relays at the same time.

[0005] For the above U2N and U2U relay scenarios, the prior art has not disclosed a solution for triggering a remote UE to start discovery and / or measurement of multiple paths. SUMMARY

[0006] Embodiments of the present application provide a communication link access method, device, electronic equipment, computer readable storage medium and computer program product, which can solve the above technical problems. The technical solution is as follows:

[0007] According to a first aspect of embodiments of the present application, a communication link access method is provided, which comprises:

[0008] obtaining a communication quality parameter of a first communication link;

[0009] if the communication quality parameter meets a preset condition, starting multiple path measurement;

[0010] The communication quality parameter includes one or more of the communication quality parameters related to the first user equipment logical channel, the data link layer and the service data.

[0011] According to a second aspect of embodiments of the present application, a first user equipment is provided, characterized by comprising a memory, a transceiver and a processor:

[0012] The memory is used to store a computer program; the transceiver is used to transceive data under the control of the processor; and the processor is used to read the computer program in the memory and perform the following operations:

[0013] acquire a communication quality parameter of the first communication link;

[0014] start the multipath measurement if the communication quality parameter meets a preset condition;

[0015] The communication quality parameter includes one or more of a logical channel of the first user equipment, a data link layer, and service data.

[0016] According to a third aspect of the embodiments of the present application, an access device of a communication link is provided, which is applied to a first user equipment and includes:

[0017] The parameter acquisition module is configured to acquire a communication quality parameter of the first communication link.

[0018] The measurement starting module is configured to start the multipath measurement if the communication quality parameter meets a preset condition.

[0019] The communication quality parameter includes one or more of a logical channel of the first user equipment, a data link layer, and service data.

[0020] According to a fourth aspect of the embodiments of the present application, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory. The processor executes the computer program to implement the steps of the above method.

[0021] According to a fifth aspect of the embodiments of the present application, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the steps of the above method.

[0022] According to a sixth aspect of the embodiments of the present application, a computer program product is provided, which stores a computer program. The computer program is executed by a processor to implement the steps of the above method.

[0023] The technical scheme provided by the embodiments of the present application has the following beneficial effects:

[0024] By acquiring the communication quality parameter of the first communication link, the communication quality parameter includes one or more of a logical channel of the first user equipment, a data link layer, and service data. If the communication quality parameter meets a preset condition, the multipath measurement is started. The first UE can implement the relay discovery and measurement of multiple communication links in the U2N and U2U relay scenarios, better meet the demand of service transmission, and improve the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced.

[0026] Figure 1 An illustration of a network-centric controlled communication manner in a wireless communication system;

[0027] Figure 2 An illustration of SideLink discovery or communication;

[0028] Figure 3 An illustration of UE-to-Network Relay;

[0029] Figure 4 An illustration of UE-to-UE Relay;

[0030] Figure 5 An illustration of a flow of an access method of a communication link provided by an embodiment of the present application;

[0031] Figure 6 An illustration of an interaction of an access method of a communication link provided by an embodiment of the present application;

[0032] Figure 7 An illustration of an interaction of an access method of a communication link provided by another embodiment of the present application;

[0033] Figure 8 An illustration of an interaction of an access method of a communication link provided by still another embodiment of the present application;

[0034] Figure 9 An illustration of a structure of a first UE provided by an embodiment of the present application;

[0035] Figure 10 An illustration of a structure of an access apparatus of a communication link provided by an embodiment of the present application. DETAILED DESCRIPTION

[0036] Embodiments of the present application will be described below in conjunction with the accompanying drawings. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions of the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0037] Those skilled in the art can understand that the singular forms "a", "an" and "the" used herein include plural forms unless specifically stated otherwise. It should be further understood that the terms "include" and "contain" used in the embodiments of the present application mean that the corresponding features can be implemented as the presented features, information, data, steps, operations, elements and / or components, but do not exclude other features, information, data, steps, operations, elements, components and / or their combinations supported by the present technology. It should be understood that when we say that an element is "connected" or "coupled" to another element, the element can be directly connected or coupled to the other element, or it can mean that the element and the other element are connected through an intermediate element. In addition, "connected" or "coupled" used herein can include wireless connection or wireless coupling. The term "and / or" used herein means that at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0038] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0039] First, several terms related to the present application are introduced and explained:

[0040] 1) Cellular network communication

[0041] The traditional wireless communication adopts a cellular network communication mode, that is, the terminal and the network side device transmit uplink and downlink data / control information through a Uu interface. As shown in Figure 1 , the terminal is connected with the network side device (referred to as network device) through the Uu interface to access the CN core network.

[0042] 2) Direct communication

[0043] Direct communication refers to a mode in which adjacent terminals can transmit data within a short distance range through a direct communication link (also referred to as Sidelink or PC5), and the direct communication link is also referred to as a direct link. The wireless interface corresponding to the Sidelink link is referred to as a direct communication interface (also referred to as a Sidelink interface or a PC5 interface), and the direct communication interface is also referred to as a direct interface.

[0044] D2D (Device-to-Device Communication) communication technology refers to a communication mode in which two peer user nodes directly communicate with each other. In a distributed network composed of D2D communication user nodes, each user node can transmit and receive signals and has the function of automatic routing (forwarding messages). As shown in Figure 2 , compared with Figure 1The system architecture diagram shown indicates that there is a direct link between UE1 and UE2.

[0045] 3) Relay

[0046] To extend network coverage, one solution is to introduce a relay. A relay can be a terminal with relay functionality.

[0047] For UE-to-Network Relay, the interface between the Relay and the network uses the Uu interface, while the interface between the Relay and the relayed UE (referred to as the remote UE in the patent) uses the direct communication interface. The link between the Relay and the network can be referred to as the backhaul link (BH) for the remote UE.

[0048] - For UE-to-UE Relay, two relayed UEs can transmit data through the relay UE.

[0049] 4) Logical Channel

[0050] A logical channel is a service provided by the MAC sublayer to the upper layers, indicating what content it carries. A logical channel is a channel that transmits different types of information over a physical channel. It can be divided into two categories: control channels and traffic channels.

[0051] 5) User equipment (UE) can be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem.

[0052] 6) Network equipment can be a base station (Node B, NB) under Universal Mobile Telecommunications System (UMTS), an evolved Node B (eNB) under Long Term Evolution (LTE), or a base station or controller under 5G mobile communication system.

[0053] Please see Figure 3 The remote UE connects to the network-side equipment through a relay UE. The link between the remote UE and the relay UE is a direct link, while the link between the relay UE and the network-side equipment is a backhaul link.

[0054] Please see Figure 4 Remote UE1 and remote UE2 are connected via a relay UE, and the relay UE is connected to each remote UE via a direct link.

[0055] In relay scenarios, to improve transmission rate or reliability, a UE can communicate with the base station or target UE through multiple paths. For example, in a U2N relay, a remote UE can communicate with the base station simultaneously through a direct Uu link and a non-direct communication link of the U2N relay, or a remote UE can communicate with the base station simultaneously through multiple non-direct communication links of the U2N relay. Similarly, in a U2U relay, two UEs can communicate simultaneously through a direct SL link and a non-direct communication link of the U2U relay, or two UEs can communicate simultaneously through multiple non-direct communication links of the U2U relay. Currently, there are no publicly available solutions for discovering and / or measuring multipath activation by a remote UE in U2N and U2U relay scenarios.

[0056] The communication link access method, apparatus, electronic device, computer-readable storage medium, and computer program product provided in this application are intended to solve the above-mentioned technical problems of the prior art.

[0057] The technical solutions of this application and their effects are described below through several exemplary embodiments. It should be noted that the following embodiments can be referenced, borrowed from, or combined with each other. Identical terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0058] This application provides a method for accessing a communication link, which is applied to a first UE, such as... Figure 5 As shown, the method includes:

[0059] S101. Obtain communication quality parameters in the first communication link; the communication quality parameters include one or more communication quality parameters related to the first UE logical channel, data link layer and service data.

[0060] The first communication link in this application embodiment is either a direct link or a non-direct link between a first UE and a target device, where the target device is a network device or a second UE. Specifically, a communication link where communication devices directly establish a communication connection without the need for relay devices is called a direct link. A non-direct link refers to a communication link established between communication devices through a relay device; this type of communication link is also called a non-direct link. In other words, a direct link is a type of direct link—where terminals directly establish a communication connection.

[0061] The embodiments of this application are applicable to scenarios in which the UE and the network device are connected via a Uu direct link, scenarios in which the UE and the network device are connected via a U2N relay non-direct link, scenarios in which the first UE and the second UE are connected via a direct link through the SL interface or the PC5 interface, and scenarios in which the first UE and the second UE are connected via a U2U relay non-direct link.

[0062] The communication quality parameters in this application embodiment may include one or more communication quality parameters related to the first UE's logical channel, data link layer, and service data. Specifically, the communication quality parameters related to the first UE may include one or more of the following:

[0063] 1) The first UE's Logical Channel Buffer Status Report (BSR). In LTE communication systems, the buffer status report process is used to provide the eNB with information on how much data the UE has in the uplink buffer that needs to be transmitted.

[0064] 2) The logical channel buffer status report (SL BSR) of the first UE's direct link;

[0065] 3) The BSR of the logical channel group of the first UE;

[0066] 4) The logical channel group SL BSR of the first UE.

[0067] Communication quality parameters related to the data link layer may include one or more of the following:

[0068] 1) Media access control MAC layer cache data volume;

[0069] 2) Data buffer size of the Radio Link Control (RLC) layer;

[0070] 3) Data cache size of the Packet Data Convergence Protocol (PDCP) layer.

[0071] Communication quality parameters related to business data may include one or more of the following:

[0072] 1) Data transmission rate of business data;

[0073] 2) Packet loss rate of business data;

[0074] 3) Transmission latency of business data;

[0075] 4) Priority of business data.

[0076] S102. If the communication quality parameters meet the preset conditions, then multipath measurement is enabled.

[0077] The preset conditions of this application embodiment include one or more of the following:

[0078] 1) The BSR of at least one logical channel of the first UE is greater than or equal to the first threshold;

[0079] 2) The SL BSR of at least one logical channel of the first UE is greater than or equal to the second threshold;

[0080] 3) The BSR of at least one logical channel group of the first UE is greater than or equal to the third threshold;

[0081] 4) The SL BSR of at least one logical channel group of the first UE is greater than or equal to the fourth threshold;

[0082] 5) The amount of cached data in the MAC layer is greater than or equal to the fifth threshold;

[0083] 6) The amount of cached data in the RLC layer is greater than or equal to the sixth threshold;

[0084] 7) The amount of cached data in the PDCP layer is greater than or equal to the seventh threshold;

[0085] 8) The data transmission rate of business data is greater than or equal to the eighth threshold;

[0086] 9) The packet loss rate of business data is less than or equal to the ninth threshold;

[0087] 10) The transmission delay of business data is less than or equal to the tenth threshold;

[0088] 11) The priority of business data is higher than or equal to the eleventh threshold.

[0089] This application does not impose specific limitations on the magnitude relationship and specific values ​​of the above thresholds in its embodiments.

[0090] When the communication quality parameters meet the preset conditions, the configuration information of other communication links between the first UE and the target device is obtained to access these other communication links. It should be understood that, in this embodiment, "other communication links" refers to communication links other than the first communication link. The number of other communication links may be more than one, allowing the first UE to communicate with the target device simultaneously through the first communication link and other communication links. In other words, when the first communication link between the first UE and the target device is a non-directly connected link, the obtained other communication links may include directly connected links or other non-directly connected links.

[0091] The communication link access method of this application embodiment obtains the communication quality parameters of the first communication link. The communication quality parameters include one or more communication quality parameters related to the logical channel, data link layer and service data of the first user equipment. If the communication quality parameters meet the preset conditions, multipath measurement is enabled, which enables the first UE to realize the relay discovery and measurement of multiple communication links in U2N and U2U relay scenarios, better meet the needs of service transmission and improve user experience.

[0092] Based on the above embodiments, as an optional embodiment, the preset conditions are configured by the first user equipment logical channel, the target device, or the relay user equipment.

[0093] Specifically, when the first UE is in a scenario where it is directly connected to the network device, the preset conditions can be pre-configured (e.g., at the factory) in the first UE, or they can be sent to the first UE after configuration by the network device.

[0094] When the first UE is in a scenario where it is not directly connected to the network device (i.e., connected to the network device through the second relay UE), the preset condition can be either pre-configured on the first UE, configured by the network device and sent to the first UE, or configured by the second relay UE and sent to the first UE.

[0095] When the first UE is in a U2U scenario, the preset conditions can be pre-configured on the first UE or configured by the peer UE and sent to the first UE.

[0096] Based on the above embodiments, as an optional embodiment, enabling multipath measurement includes:

[0097] S201, Receive a discovery message for at least one candidate relay user equipment.

[0098] Specifically, in this embodiment of the application, the first UE can discover candidate relay UEs through a direct connection interface, namely the SL interface or the PC5 interface. It should be understood that the reception of relay user equipment discovery messages in this embodiment of the application is applicable to scenarios where the first UE and the target device are directly connected or not directly connected. That is to say, regardless of whether the target device is a network device or the second UE, and whether it is a direct connection scenario or not, candidate relay user equipment needs to be obtained when multipath measurement is enabled, so as to lay the foundation for opening a new non-direct connection link between the first UE and the target device.

[0099] This application embodiment receives discovery messages in the following two ways:

[0100] Method 1: The remote UE (i.e., the first UE) directly receives the discovery message from the candidate relay UE.

[0101] For Method 1, all UEs within the network environment can independently broadcast discovery messages, so when a remote UE needs to establish a multipath connection, it can directly receive discovery messages from other UEs.

[0102] In Method Two, the first UE first sends a discovery request, and then receives a discovery message from the candidate relay UE.

[0103] The first UE sends a discovery request to the candidate relay UE, instructing the candidate relay UE to reply with a discovery message to the first UE based on the received discovery request.

[0104] For method two, the first UE needs to send a discovery request first. Only other UEs that receive the discovery request will reply with a discovery message to the first UE. Compared with method one, this can reduce the communication power consumption of other UEs.

[0105] S202, Measure the quality of the discovered message.

[0106] This application enables multipath measurement by receiving discovery messages from candidate relay UEs. The purpose is to select a target relay UE from the candidate relay UEs, and then establish a new non-direct link between the first UE and the target device based on the target relay UE. It should be noted that the quality of the discovery message in this application embodiment can be characterized by the Sidelink Discovery Reference Signal Received Power (SD-RSRP).

[0107] Based on the above embodiments, as an optional embodiment, when the first UE is in a U2N relay scenario, that is, the target device is a network device and the first communication link is a non-directly connected link, enabling multipath measurement further includes:

[0108] Measure the quality of downlink signals transmitted by network devices.

[0109] By measuring the quality of the downlink signal sent by the network device, it can be determined whether the subsequently established multipath connection can include the direct link between the first UE and the network device.

[0110] It should be noted that when the first UE was originally in a U2N ralay scenario, it means that the first UE and the network device were originally connected through a relay UE. The purpose of measuring the quality of the downlink signal sent by the network device is that if the quality of the downlink signal is good, a direct link can be established directly, resulting in lower communication costs.

[0111] Furthermore, embodiments of this application can also measure the downlink channel quality of the cell where the first UE is located and neighboring cells. By measuring the downlink channel quality of the cell where the first UE is located and neighboring cells, a foundation is laid for determining a communication link with better link quality. Embodiments of this application measure the channel quality of the cell where the first UE is located and the cell where the image is located, laying a foundation for the network device to hand over the first UE to a serving cell with higher communication quality.

[0112] Based on the above embodiments, as an optional embodiment, when the first UE is in a U2U relay scenario, that is, when the target device is the second user equipment and the first communication link is a non-directly connected link, enabling multipath measurement further includes:

[0113] The system instructs the second user equipment to initiate multipath measurement and sends information about the discovered candidate relay user equipment and the corresponding measurement results to the first user equipment.

[0114] In this embodiment of the application, the first UE instructs the second UE to discover a candidate relay UE through a pass-through interface, measures the link quality of the pass-through link between the second UE and the candidate relay UE, and sends the discovered candidate relay UE and the corresponding link quality to the first UE.

[0115] In a U2U relay scenario, when either UE at either end determines that the communication quality parameters meet preset conditions, in addition to initiating relay discovery and measurement on its own PC5 interface, it also needs to send relay discovery and measurement trigger information to the peer UE to trigger the peer UE to initiate PC5 interface relay discovery and measurement. The methods for triggering relay discovery and measurement are the same for both UEs, both triggered when the communication quality meets preset conditions. Both UEs need to exchange measurement results, i.e., the link quality of the direct link between themselves and the candidate relay UE, as well as the unique identifier of the candidate relay UE, and ultimately select at least one relay UE to establish a multipath connection.

[0116] Please see Figure 6 The figure illustrates an interactive schematic diagram of a communication link access method according to an embodiment of the present application. As shown in the figure, the first UE (i.e., the remote UE in the figure) and the network device are connected through the first communication link (path1). It can be seen that the first communication link is a Uu link, and the first UE communicates with the network device through a direct link.

[0117] If the BSR of a logical channel group of a remote UE is greater than a preset third threshold, PC5 interface relay discovery and measurement are initiated. In this embodiment, the candidate relay UE can actively send a discovery message. Specifically, the access procedure for the communication link in this embodiment includes:

[0118] 1. The remote UE communicates with the network device through the established path 1;

[0119] 2. If the BSR of a logical channel group of a remote UE exceeds the configured third threshold, and the communication quality parameters are determined to meet the preset conditions, the remote UE will initiate PC5 interface relay discovery and measurement.

[0120] 3. The remote UE receives the relay discovery message from candidate relay UE1 and measures the signal quality of the relay discovery message from candidate relay UE1;

[0121] 3a. The remote UE receives the discovery message from candidate relay UE2 and measures the signal quality of the discovery message from candidate relay UE2;

[0122] Once the measurement reporting conditions are met, the remote UE needs to report the relevant measurement results to the network device serving it through path 1.

[0123] Based on the measurement results, the network device selects N relay UEs for the remote UE. For example, if UE1 is selected as a relay UE, the network device adds the link between the remote UE and the network through UE1 as path2, sends the configuration information of path2 to the remote UE through path1, and sends the configuration information of the remote UE to UE1.

[0124] The remote UE establishes a unicast SL connection with UE1 and uses network configuration to establish a path2 connection with the network.

[0125] It should be understood that Figure 6 The illustrated embodiment is also applicable to other conditions; simply modify step 2 to meet the corresponding conditions. Similarly, Figure 6 The illustrated embodiment is also applicable to combinations of multiple conditions. For example, in step 2, the remote UE needs to simultaneously satisfy the condition that the amount of data cached by the MAC layer exceeds the configured fifth threshold and the packet loss rate of the service data is less than the ninth threshold before the remote UE can initiate relay discovery and measurement.

[0126] Please see Figure 7 The figure exemplarily illustrates an interactive schematic diagram of a communication link access method according to another embodiment of this application, as shown in the figure. Figure 6 Unlike the direct link communication between the remote UE and the network device in the illustrated embodiment, this one does not. Figure 7 The remote UE and the network equipment base station are connected via an indirect path through relay UE1 (path1 in the attached diagram is the indirect path). The data transmission rate of the service data is greater than the eighth threshold. The PC5 interface adopts the method of discovering the remote UE first sending a discovery request message, and the relay UE replying with a discovery message.

[0127] Specifically, the access process of the communication link in this application embodiment includes:

[0128] 1. The remote UE and the network device communicate via path 1 established through relay UE1;

[0129] 2. The transmission rate of the service data of the remote UE exceeds the configured eighth threshold. The remote UE initiates PC5 interface relay discovery and measurement, as well as measurement of the Uu interface. It should be noted that the remote UE and the network device in this application originally communicated through a non-direct link. By initiating the measurement of the Uu interface, the foundation is laid for the subsequent establishment of a direct link communication between the remote UE and the network device.

[0130] 3. The remote UE sends a relay discovery request message on the PC5 interface;

[0131] 4. After receiving the relay discovery request message from the remote UE, candidate relay UE2 sends a relay discovery message to the remote UE; the remote UE receives the discovery message from UE2 and measures the signal quality of the discovery message from UE2.

[0132] 5. The remote UE measures the downlink channel quality (DownLink signal) of its own cell and neighboring cells at the Uu interface.

[0133] Once the measurement reporting conditions are met, the remote UE needs to report the relevant measurement results to the network device serving it via path 1. Based on the measurement results, the network device selects N relay UEs and / or target cells for the remote UE. For example, if UE2 is selected as a relay UE, the network device adds the link connecting the remote UE to the network via relay UE2 as path 2, sends the configuration information of path 2 to the remote UE via path 1, and then sends the configuration information of the remote UE to UE2. The remote UE establishes a unicast SL connection with UE2 and uses the network configuration to establish a path 2 connection with the network. Alternatively, if the downlink signal quality transmitted by the network device is determined to meet preset conditions via the Uu interface, a direct link between the remote UE and the network device can also be established.

[0134] It should be understood that, Figure 7 The illustrated embodiment is also applicable to other conditions; simply modify step 2 to meet the corresponding conditions. Similarly, Figure 7 The illustrated embodiment is also applicable to combinations of multiple conditions. For example, in step 2, the remote UE needs to simultaneously satisfy the requirement that the amount of cached data in the PDCP layer is greater than or equal to the seventh threshold and the priority of the service data is higher than or equal to the eleventh threshold before the remote UE initiates relay discovery and measurement.

[0135] Please see Figure 8 The figure illustrates an interactive schematic diagram of the communication link access method in another embodiment of the present application. As shown in the figure, in the U2U relay, UE1 and UE2 are connected through path1 of PC5 for direct communication. The packet loss rate of the service is required to be less than the ninth threshold. The PC5 interface adopts the method of UE1 first sending a discovery request message and the relay UE replying with the discovery message.

[0136] Specifically, the access process of the communication link in this application embodiment includes:

[0137] 1. UE1 and UE2 communicate via a direct communication link, path 1;

[0138] 2. The packet loss rate of the service sent by UE1 is required to be less than the configured ninth threshold. UE1 initiates PC5 interface relay discovery and measurement.

[0139] 3. UE1 sends relay discovery trigger information to UE2 via path 1;

[0140] 4. UE1 sends a relay discovery request message on the PC5 interface;

[0141] 4a. After receiving the relay discovery trigger message from UE1, UE2 sends a relay discovery request message on the PC5 interface;

[0142] 5. After receiving the relay discovery request message from UE1, candidate relay UE3 sends a relay discovery message to UE1; UE1 receives the discovery message from UE3 and measures the signal quality of the discovery message from UE3.

[0143] 5a. After receiving the relay discovery request message from UE2, candidate relay UE3 sends a relay discovery message to UE2; UE2 receives the discovery message from relay UE3 and measures the signal quality of the discovery message from UE3.

[0144] 6. After receiving the relay discovery request message from UE1, candidate relay UE4 sends a relay discovery message to UE1; UE1 receives the discovery message from UE4 and measures the signal quality of the discovery message from UE4.

[0145] 6a. After receiving the relay discovery request message from UE2, UE4 sends a relay discovery message to UE2; UE2 receives the discovery message from UE4 and measures the signal quality of the discovery message from UE4.

[0146] 7. UE2 sends the information of the candidate relay UEs (UE3 and UE4) discovered by PC5 and the corresponding measurement results to UE1.

[0147] Based on its own and UE2's measurement results, UE1 selects N relay UEs, for example, selecting UE3 as a relay UE. UE1 sends the selected relay UE information (UE3) and its corresponding configuration information to UE2 via path 1. UE1 and UE2 each establish SL connections with UE3 and establish end-to-end path 2 through UE3. UE1 and UE2 communicate simultaneously through path 1 and path 2.

[0148] It should be understood that, Figure 8 The illustrated embodiment is also applicable to other conditions; simply modify step 2 to meet the corresponding conditions. Similarly, Figure 8 The illustrated embodiment is also applicable to combinations of multiple conditions. For example, in step 2, the remote UE needs to simultaneously satisfy at least one logical channel BSR greater than or equal to the first threshold, the RLC layer buffer data volume greater than or equal to the sixth threshold, and the service data transmission delay less than or equal to the tenth threshold before the remote UE initiates relay discovery and measurement.

[0149] like Figure 9 As shown, embodiments of this application also provide a first user equipment, including a memory 920, a transceiver 940, and a processor 910;

[0150] Memory 920 is used to store computer programs;

[0151] Transceiver 940 is used to receive and send data under the control of processor 910;

[0152] Processor 910 is used to read computer programs from memory 920 and perform the following operations:

[0153] Obtain the communication quality parameters of the first communication link;

[0154] If the communication quality parameters meet the preset conditions, multipath measurement will be enabled.

[0155] The communication quality parameters include one or more communication quality parameters related to the first user equipment logical channel, data link layer, and service data.

[0156] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to the logical channel of the first user equipment include one or more of the following:

[0157] Logical Channel Buffer Status Report (BSR) of the first user equipment;

[0158] Logical Channel Buffer Status Report (SL BSR) of the direct link of the first user equipment;

[0159] The logical channel group's BSR for the first user equipment;

[0160] The logical channel group SL BSR of the first user equipment;

[0161] The preset conditions include one or more of the following:

[0162] The BSR of at least one logical channel of the first user equipment is greater than or equal to the first threshold;

[0163] The SL BSR of at least one logical channel of the first user equipment is greater than or equal to the second threshold;

[0164] The BSR of at least one logical channel group of the first user equipment is greater than or equal to the third threshold;

[0165] The SL BSR of at least one logical channel group of the first user equipment is greater than or equal to the fourth threshold.

[0166] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to the data link layer include one or more of the following:

[0167] Media access control MAC layer cache data volume;

[0168] The amount of data buffered in the Radio Link Control (RLC) layer;

[0169] Packet Data Convergence Protocol (PDCP) layer cache data volume;

[0170] The preset conditions include one or more of the following:

[0171] The amount of cached data in the MAC layer is greater than or equal to the fifth threshold;

[0172] The amount of cached data in the RLC layer is greater than or equal to the sixth threshold;

[0173] The amount of cached data in the PDCP layer is greater than or equal to the seventh threshold.

[0174] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to service data include one or more of the following:

[0175] Data transmission rate of business data;

[0176] Packet loss rate of business data;

[0177] Data transmission latency;

[0178] Priority of business data;

[0179] The preset conditions include one or more of the following:

[0180] The data transmission rate of business data is greater than or equal to the eighth threshold;

[0181] The packet loss rate of business data is less than or equal to the ninth threshold;

[0182] The transmission delay of business data is less than or equal to the tenth threshold;

[0183] Business data has a priority higher than or equal to the eleventh threshold.

[0184] Based on the above embodiments, as an optional embodiment, the preset conditions are configured by the first user equipment logical channel, the target device, or the relay user equipment;

[0185] The first communication link is either a direct link or a non-direct link between the first user equipment and the target equipment.

[0186] When the first communication link is a non-direct link, the first user equipment communicates with the target equipment through a relay user equipment;

[0187] The target device is a network device or a second user device.

[0188] Based on the above embodiments, as an optional embodiment, enabling multipath measurement includes:

[0189] Receive a discovery message for at least one candidate relay user equipment;

[0190] Measure the quality of the discovered message.

[0191] Based on the above embodiments, as an optional embodiment, when the target device is a network device and the first communication link is a non-directly connected link, multipath measurement is enabled, including:

[0192] Measure the quality of downlink signals transmitted by network devices.

[0193] Based on the above embodiments, as an optional embodiment, when the target device is a second user equipment and the first communication link is a non-directly connected link, enabling multipath measurement further includes:

[0194] The system instructs the second user equipment to initiate multipath measurement and sends information about the discovered candidate relay user equipment and the corresponding measurement results to the first user equipment.

[0195] Among them, Figure 9In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors 910 represented by processor 910 and various circuits of memory 920 represented by memory 920. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 930 provides an interface. Transceiver 940 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. Processor 910 is responsible for managing the bus architecture and general processing, and memory 920 can store data used by processor 910 during operation. For different user devices, user interface 950 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0196] The processor 910 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor 910 can also adopt a multi-core architecture.

[0197] The processor 910 executes any of the methods provided in the embodiments of this application according to the obtained executable instructions by calling the computer program stored in the memory 920. The processor 910 and the memory 920 may also be physically separated.

[0198] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0199] This application provides an access device for a communication link, such as... Figure 10 As shown, the access device for this communication link may include: a parameter acquisition module 101 and a measurement activation module 102, wherein,

[0200] The parameter acquisition module 101 is used to acquire communication quality parameters in the first communication link; the communication quality parameters include one or more communication quality parameters related to the first UE logical channel, data link layer and service data.

[0201] The measurement activation module 102 is used to activate multipath measurement if the communication quality parameters meet preset conditions.

[0202] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to the logical channel of the first user equipment include one or more of the following:

[0203] Logical Channel Buffer Status Report (BSR) of the first user equipment;

[0204] Logical Channel Buffer Status Report (SL BSR) of the direct link of the first user equipment;

[0205] The logical channel group's BSR for the first user equipment;

[0206] The logical channel group SL BSR of the first user equipment;

[0207] The preset conditions include one or more of the following:

[0208] The BSR of at least one logical channel of the first user equipment is greater than or equal to the first threshold;

[0209] The SL BSR of at least one logical channel of the first user equipment is greater than or equal to the second threshold;

[0210] The BSR of at least one logical channel group of the first user equipment is greater than or equal to the third threshold;

[0211] The SL BSR of at least one logical channel group of the first user equipment is greater than or equal to the fourth threshold.

[0212] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to the data link layer include one or more of the following:

[0213] Media access control MAC layer cache data volume;

[0214] The amount of data buffered in the Radio Link Control (RLC) layer;

[0215] Packet Data Convergence Protocol (PDCP) layer cache data volume;

[0216] The preset conditions include one or more of the following:

[0217] The amount of cached data in the MAC layer is greater than or equal to the fifth threshold;

[0218] The amount of cached data in the RLC layer is greater than or equal to the sixth threshold;

[0219] The amount of cached data in the PDCP layer is greater than or equal to the seventh threshold.

[0220] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to service data include one or more of the following:

[0221] Data transmission rate of business data;

[0222] Packet loss rate of business data;

[0223] Data transmission latency;

[0224] Priority of business data;

[0225] The preset conditions include one or more of the following:

[0226] The data transmission rate of business data is greater than or equal to the eighth threshold;

[0227] The packet loss rate of business data is less than or equal to the ninth threshold;

[0228] The transmission delay of business data is less than or equal to the tenth threshold;

[0229] Business data has a priority higher than or equal to the eleventh threshold.

[0230] Based on the above embodiments, as an optional embodiment, the preset conditions are configured by the first user equipment logical channel, the target device, or the relay user equipment;

[0231] The first communication link is either a direct link or a non-direct link between the first user equipment and the target equipment.

[0232] When the first communication link is a non-direct link, the first user equipment communicates with the target equipment through a relay user equipment;

[0233] The target device is a network device or a second user device.

[0234] Based on the above embodiments, as an optional embodiment, the measurement activation module includes:

[0235] Discovery message receiving unit, used to receive discovery messages of at least one candidate relay user equipment;

[0236] The quality measurement unit measures the quality of the discovered messages.

[0237] Based on the above embodiments, as an optional embodiment, when the target device is a network device and the first communication link is a non-directly connected link, the measurement activation module further includes:

[0238] Downlink quality measurement unit, used to measure the quality of downlink signals transmitted by network devices.

[0239] Based on the above embodiments, as an optional embodiment, when the target device is a second user equipment and the first communication link is a non-directly connected link, the measurement activation module further includes:

[0240] The measurement indication unit is used to instruct the second user equipment to start multipath measurement and to send the information of the discovered candidate relay user equipment and the corresponding measurement results to the first user equipment.

[0241] The apparatus in this application embodiment can execute the method provided in this application embodiment, and the implementation principle is similar. The actions performed by each module in the apparatus of each embodiment of this application correspond to the steps in the method of each embodiment of this application. For detailed functional descriptions of each module of the apparatus, please refer to the descriptions in the corresponding methods shown above, which will not be repeated here.

[0242] This application provides an electronic device, including a memory, a processor, and a computer program stored in the memory. The processor executes the computer program to implement the steps of the communication link access method. Compared with related technologies, it can achieve the following: by acquiring one or more communication quality parameters related to the first UE's logical channel, data link layer, and service data in the first communication link, when the communication quality parameters meet preset conditions, the configuration information of other communication links between the first UE and the target device is acquired and accessed. This allows the first UE to connect to the target device simultaneously through the first communication link and other communication links, realizing the relay discovery and measurement of multiple communication links, better meeting the needs of service transmission, and improving user experience.

[0243] This application provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program can implement the steps and corresponding content of the aforementioned method embodiments. Specifically, it includes:

[0244] Obtain the communication quality parameters of the first communication link;

[0245] If the communication quality parameters meet the preset conditions, multipath measurement will be enabled.

[0246] The communication quality parameters include one or more communication quality parameters related to the first user equipment logical channel, data link layer, and service data.

[0247] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to the logical channel of the first user equipment include one or more of the following:

[0248] Logical Channel Buffer Status Report (BSR) of the first user equipment;

[0249] Logical Channel Buffer Status Report (SL BSR) of the direct link of the first user equipment;

[0250] The logical channel group's BSR for the first user equipment;

[0251] The logical channel group SL BSR of the first user equipment;

[0252] The preset conditions include one or more of the following:

[0253] The BSR of at least one logical channel of the first user equipment is greater than or equal to the first threshold;

[0254] The SL BSR of at least one logical channel of the first user equipment is greater than or equal to the second threshold;

[0255] The BSR of at least one logical channel group of the first user equipment is greater than or equal to the third threshold;

[0256] The SL BSR of at least one logical channel group of the first user equipment is greater than or equal to the fourth threshold.

[0257] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to the data link layer include one or more of the following:

[0258] Media access control MAC layer cache data volume;

[0259] The amount of data buffered in the Radio Link Control (RLC) layer;

[0260] Packet Data Convergence Protocol (PDCP) layer cache data volume;

[0261] The preset conditions include one or more of the following:

[0262] The amount of cached data in the MAC layer is greater than or equal to the fifth threshold;

[0263] The amount of cached data in the RLC layer is greater than or equal to the sixth threshold;

[0264] The amount of cached data in the PDCP layer is greater than or equal to the seventh threshold.

[0265] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to service data include one or more of the following:

[0266] Data transmission rate of business data;

[0267] Packet loss rate of business data;

[0268] Data transmission latency;

[0269] Priority of business data;

[0270] The preset conditions include one or more of the following:

[0271] The data transmission rate of business data is greater than or equal to the eighth threshold;

[0272] The packet loss rate of business data is less than or equal to the ninth threshold;

[0273] The transmission delay of business data is less than or equal to the tenth threshold;

[0274] Business data has a priority higher than or equal to the eleventh threshold.

[0275] Based on the above embodiments, as an optional embodiment, the preset conditions are configured by the first user equipment logical channel, the target device, or the relay user equipment;

[0276] The first communication link is either a direct link or a non-direct link between the first user equipment and the target equipment.

[0277] When the first communication link is a non-direct link, the first user equipment communicates with the target equipment through a relay user equipment;

[0278] The target device is a network device or a second user device.

[0279] Based on the above embodiments, as an optional embodiment, enabling multipath measurement includes:

[0280] Receive a discovery message for at least one candidate relay user equipment;

[0281] Measure the quality of the discovered message.

[0282] Based on the above embodiments, as an optional embodiment, when the target device is a network device and the first communication link is a non-directly connected link, multipath measurement is enabled, including:

[0283] Measure the quality of downlink signals transmitted by network devices.

[0284] Based on the above embodiments, as an optional embodiment, when the target device is a second user equipment and the first communication link is a non-directly connected link, enabling multipath measurement further includes:

[0285] The system instructs the second user equipment to initiate multipath measurement and sends information about the discovered candidate relay user equipment and the corresponding measurement results to the first user equipment.

[0286] This application also provides a computer program product, including a computer program that, when executed by a processor, can implement the steps and corresponding content of the aforementioned method embodiments. Specifically, it includes:

[0287] Obtain the communication quality parameters of the first communication link;

[0288] If the communication quality parameters meet the preset conditions, multipath measurement will be enabled.

[0289] The communication quality parameters include one or more communication quality parameters related to the first user equipment logical channel, data link layer, and service data.

[0290] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to the logical channel of the first user equipment include one or more of the following:

[0291] Logical Channel Buffer Status Report (BSR) of the first user equipment;

[0292] Logical Channel Buffer Status Report (SL BSR) of the direct link of the first user equipment;

[0293] The logical channel group's BSR for the first user equipment;

[0294] The logical channel group SL BSR of the first user equipment;

[0295] The preset conditions include one or more of the following:

[0296] The BSR of at least one logical channel of the first user equipment is greater than or equal to the first threshold;

[0297] The SL BSR of at least one logical channel of the first user equipment is greater than or equal to the second threshold;

[0298] The BSR of at least one logical channel group of the first user equipment is greater than or equal to the third threshold;

[0299] The SL BSR of at least one logical channel group of the first user equipment is greater than or equal to the fourth threshold.

[0300] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to the data link layer include one or more of the following:

[0301] Media access control MAC layer cache data volume;

[0302] The amount of data buffered in the Radio Link Control (RLC) layer;

[0303] Packet Data Convergence Protocol (PDCP) layer cache data volume;

[0304] The preset conditions include one or more of the following:

[0305] The amount of cached data in the MAC layer is greater than or equal to the fifth threshold;

[0306] The amount of cached data in the RLC layer is greater than or equal to the sixth threshold;

[0307] The amount of cached data in the PDCP layer is greater than or equal to the seventh threshold.

[0308] Based on the above embodiments, as an optional embodiment, the communication quality parameters related to service data include one or more of the following:

[0309] Data transmission rate of business data;

[0310] Packet loss rate of business data;

[0311] Data transmission latency;

[0312] Priority of business data;

[0313] The preset conditions include one or more of the following:

[0314] The data transmission rate of business data is greater than or equal to the eighth threshold;

[0315] The packet loss rate of business data is less than or equal to the ninth threshold;

[0316] The transmission delay of business data is less than or equal to the tenth threshold;

[0317] Business data has a priority higher than or equal to the eleventh threshold.

[0318] Based on the above embodiments, as an optional embodiment, the preset conditions are configured by the first user equipment logical channel, the target device, or the relay user equipment;

[0319] The first communication link is either a direct link or a non-direct link between the first user equipment and the target equipment.

[0320] When the first communication link is a non-direct link, the first user equipment communicates with the target equipment through a relay user equipment;

[0321] The target device is a network device or a second user device.

[0322] Based on the above embodiments, as an optional embodiment, enabling multipath measurement includes:

[0323] Receive a discovery message for at least one candidate relay user equipment;

[0324] Measure the quality of the discovered message.

[0325] Based on the above embodiments, as an optional embodiment, when the target device is a network device and the first communication link is a non-directly connected link, multipath measurement is enabled, including:

[0326] Measure the quality of downlink signals transmitted by network devices.

[0327] Based on the above embodiments, as an optional embodiment, when the target device is a second user equipment and the first communication link is a non-directly connected link, enabling multipath measurement further includes:

[0328] The system instructs the second user equipment to initiate multipath measurement and sends information about the discovered candidate relay user equipment and the corresponding measurement results to the first user equipment.

[0329] The terms "first," "second," "third," "fourth," "1," "2," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than that shown in the figures or text.

[0330] It should be understood that although arrows indicate various operation steps in the flowcharts of this application's embodiments, the order in which these steps are implemented is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of this application's embodiments, the implementation steps in each flowchart can be executed in other orders as required. Furthermore, some or all steps in each flowchart, based on the actual implementation scenario, may include multiple sub-steps or multiple stages. Some or all of these sub-steps or stages can be executed at the same time, and each sub-step or stage can also be executed at different times. In scenarios where execution times differ, the execution order of these sub-steps or stages can be flexibly configured according to requirements, and this application's embodiments do not limit this.

[0331] The above are only optional implementation methods for some implementation scenarios of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.

Claims

1. A method for accessing a communication link, characterized in that, Performed by a first user equipment, the method includes: Obtain communication quality parameters of the first communication link; the first communication link is a direct link or a non-direct link between the first user equipment and the target device; the target device is a network device or a second user equipment; If the communication quality parameters meet the preset conditions, multipath measurement is initiated, a second communication link is established between the first user equipment and the target equipment based on the results of the multipath measurement, and communication is carried out simultaneously based on the first communication link and the second communication link. The communication quality parameters include one or more communication quality parameters related to the first user equipment logical channel, data link layer, and service data. When the first communication link is a non-direct link, the first user equipment communicates with the target equipment through a relay user equipment.

2. The access method according to claim 1, characterized in that, Communication quality parameters related to the logical channel of the first user equipment include one or more of the following: The logical channel buffer status report (BSR) of the first user equipment; The logical channel buffer status report (SL BSR) of the direct link of the first user equipment; The logical channel group (BSR) of the first user equipment; The logical channel group SL BSR of the first user equipment; The preset conditions include one or more of the following: The BSR of at least one logical channel of the first user equipment is greater than or equal to the first threshold; The SL BSR of at least one logical channel of the first user equipment is greater than or equal to the second threshold; The BSR of at least one logical channel group of the first user equipment is greater than or equal to the third threshold; The SL BSR of at least one logical channel group of the first user equipment is greater than or equal to the fourth threshold.

3. The method according to claim 1, characterized in that, Communication quality parameters related to the data link layer include one or more of the following: Media access control MAC layer cache data volume; The amount of data buffered in the Radio Link Control (RLC) layer; Packet Data Convergence Protocol (PDCP) layer cache data volume; The preset conditions include one or more of the following: The amount of cached data in the MAC layer is greater than or equal to the fifth threshold; The amount of cached data in the RLC layer is greater than or equal to the sixth threshold; The cached data volume of the PDCP layer is greater than or equal to the seventh threshold.

4. The method according to claim 1, characterized in that, Communication quality parameters related to business data include one or more of the following: Data transmission rate of business data; Packet loss rate of business data; Data transmission latency; Priority of business data; The preset conditions include one or more of the following: The data transmission rate of business data is greater than or equal to the eighth threshold; The packet loss rate of business data is less than or equal to the ninth threshold; The transmission delay of business data is less than or equal to the tenth threshold; Business data has a priority higher than or equal to the eleventh threshold.

5. The method according to claim 1, characterized in that, The preset conditions are configured by the logical channel of the first user equipment, the target device, or the relay user equipment.

6. The method according to claim 5, characterized in that, The activation of multipath measurement includes: Receive a discovery message for at least one candidate relay user equipment; Measure the quality of the discovery message.

7. The method according to claim 5 or 6, characterized in that, When the target device is a network device and the first communication link is a non-directly connected link, the step of enabling multipath measurement further includes: Measure the quality of the downlink signal transmitted by the network device.

8. The method according to claim 6, characterized in that, When the target device is the second user equipment and the first communication link is a non-directly connected link, the step of enabling multipath measurement further includes: The second user equipment is instructed to enable multipath measurement and to send information about the discovered candidate relay user equipment and the corresponding measurement results to the first user equipment.

9. A first user equipment, characterized in that, Includes memory, transceiver, and processor: A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Obtain communication quality parameters of the first communication link; the first communication link is a direct link or a non-direct link between the first user equipment and the target device; the target device is a network device or a second user equipment; If the communication quality parameters meet the preset conditions, multipath measurement is initiated, a second communication link is established between the first user equipment and the target equipment based on the results of the multipath measurement, and communication is carried out simultaneously based on the first communication link and the second communication link. The communication quality parameters include one or more communication quality parameters related to the first user equipment logical channel, data link layer, and service data. When the first communication link is a non-direct link, the first user equipment communicates with the target equipment through a relay user equipment.

10. The first user equipment according to claim 9, characterized in that, Communication quality parameters related to the logical channel of the first user equipment include one or more of the following: The logical channel buffer status report (BSR) of the first user equipment; The logical channel buffer status report (SL BSR) of the direct link of the first user equipment; The logical channel group (BSR) of the first user equipment; The logical channel group SL BSR of the first user equipment; The preset conditions include one or more of the following: The BSR of at least one logical channel of the first user equipment is greater than or equal to the first threshold; The SL BSR of at least one logical channel of the first user equipment is greater than or equal to the second threshold; The BSR of at least one logical channel group of the first user equipment is greater than or equal to the third threshold; The SL BSR of at least one logical channel group of the first user equipment is greater than or equal to the fourth threshold.

11. The first user equipment according to claim 9, characterized in that, Communication quality parameters related to the data link layer include one or more of the following: Media access control MAC layer cache data volume; The amount of data buffered in the Radio Link Control (RLC) layer; Packet Data Convergence Protocol (PDCP) layer cache data volume; The preset conditions include one or more of the following: The amount of cached data in the MAC layer is greater than or equal to the fifth threshold; The amount of cached data in the RLC layer is greater than or equal to the sixth threshold; The cached data volume of the PDCP layer is greater than or equal to the seventh threshold.

12. The first user equipment according to claim 9, characterized in that, Communication quality parameters related to business data include one or more of the following: Data transmission rate of business data; Packet loss rate of business data; Data transmission latency; Priority of business data; The preset conditions include one or more of the following: The data transmission rate of business data is greater than or equal to the eighth threshold; The packet loss rate of business data is less than or equal to the ninth threshold; The transmission delay of business data is less than or equal to the tenth threshold; Business data has a priority higher than or equal to the eleventh threshold.

13. The first user equipment according to claim 9, characterized in that, The preset conditions are configured by the first user equipment logical channel, the target device, or the relay user equipment.

14. The first user equipment according to claim 13, characterized in that, Enable multipath measurement, including: Receive a discovery message for at least one candidate relay user equipment; Measure the quality of the discovery message.

15. The first user equipment according to claim 13 or 14, characterized in that, When the target device is a network device and the first communication link is a non-directly connected link, enabling multipath measurement includes: Measure the quality of the downlink signal transmitted by the network device.

16. The first user equipment according to claim 14, characterized in that, When the target device is the second user equipment and the first communication link is a non-directly connected link, the step of enabling multipath measurement further includes: The second user equipment is instructed to enable multipath measurement and to send information about the discovered candidate relay user equipment and the corresponding measurement results to the first user equipment.

17. An access device for a communication link, applied to a first user equipment, characterized in that, include: The parameter acquisition module is used to acquire communication quality parameters of the first communication link; the first communication link is a direct link or a non-direct link between the first user equipment and the target device; the target device is a network device or a second user equipment. The measurement activation module is used to activate multipath measurement if the communication quality parameters meet preset conditions, establish a second communication link between the first user equipment and the target equipment based on the results of the multipath measurement, and simultaneously conduct communication based on the first communication link and the second communication link. The communication quality parameters include one or more communication quality parameters related to the logical channel, data link layer, and service data of the first user equipment. When the first communication link is a non-direct link, the first user equipment communicates with the target equipment through a relay user equipment.

18. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores a computer program for causing the processor to perform the method of any one of claims 1 to 8.

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