Connection establishment method, related equipment and storage medium

Abstract

The invention discloses a connection establishment method and device, a terminal, first access network equipment, second access network equipment and a storage medium. The method comprises the following steps: a terminal receives first information, and the first information at least comprises execution conditions and configuration information of candidate relay terminals and / or candidate cells; and when the execution condition is satisfied, selecting a candidate relay terminal and / or a candidate cell, and applying configuration information of the selected candidate relay terminal and / or candidate cell.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to a connection establishment method, related equipment and storage medium. Background Art

[0002] Currently, side link (SL) relays support multi-path transmission of the same base station. Figure 1 As shown, a remote user equipment (UE) can be connected to the same base station through a direct path (direct path) and an indirect path (indirect path) at the same time; wherein, for the direct path, the remote UE accesses the base station through the Uu port; and for the indirect path, the remote UE accesses the base station through a relay UE.

[0003] However, when the UE uses the relevant multi-path configuration solution to add a path, there may be a situation where the path addition fails. Summary of the invention

[0004] To solve the related technical problems, the embodiments of the present application provide a connection establishment method, related equipment and storage medium.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] The embodiment of the present application provides a connection establishment method, which is applied to a terminal, including:

[0007] receiving first information, wherein the first information at least includes execution conditions and configuration information of a candidate relay terminal and / or a candidate cell;

[0008] When the execution condition is met, a candidate relay terminal and / or a candidate cell is selected, and configuration information of the selected candidate relay terminal and / or candidate cell is applied.

[0009] In the above scheme, the method further comprises:

[0010] receiving second information sent by the first access network device, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells;

[0011] Send a measurement report to the first access network device.

[0012] In the above solution, the second information includes at least one of the following:

[0013] Measurement trigger events;

[0014] Measurement and reporting of events;

[0015] Discovery events of candidate relay terminals and / or candidate cells;

[0016] Screening events of candidate relay terminals and / or candidate cells;

[0017] Report the number of candidate relay terminals and / or candidate cells.

[0018] In the above solution, the measurement triggering event includes at least one of the following:

[0019] The quality of the serving cell is lower than or equal to a first threshold;

[0020] The quality change of the serving cell is higher than or equal to a second threshold;

[0021] The quality change rate of the serving cell is greater than or equal to a third threshold;

[0022] The uplink throughput of the terminal is greater than or equal to a fifth threshold;

[0023] The flow rate of the terminal is greater than or equal to a sixth threshold;

[0024] The buffering level of the terminal is greater than or equal to a seventh threshold;

[0025] The quality of serving the relay terminal is lower than or equal to an eighth threshold;

[0026] The quality change of the service relay terminal is lower than or equal to a ninth threshold.

[0027] In the above solution, the measurement reporting event includes at least one of the following:

[0028] The quality of the serving cell is lower than or equal to a first threshold;

[0029] The quality change of the serving cell is higher than or equal to a second threshold;

[0030] The quality change rate of the serving cell is greater than or equal to a third threshold;

[0031] The quality of the candidate relay terminal is higher than or equal to a fourth threshold;

[0032] The uplink throughput of the terminal is greater than or equal to a fifth threshold;

[0033] The flow rate of the terminal is greater than or equal to a sixth threshold;

[0034] The buffering level of the terminal is greater than or equal to a seventh threshold;

[0035] The quality of serving the relay terminal is lower than or equal to an eighth threshold;

[0036] The quality change of the service relay terminal is lower than or equal to a ninth threshold;

[0037] The quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to the tenth threshold;

[0038] The quality of the candidate relay terminal is greater than or equal to a fourth threshold, and the quality of the serving relay terminal is less than or equal to an eighth threshold;

[0039] The quality of the candidate cell is higher than or equal to an eleventh threshold.

[0040] In the above solution, the discovery event includes at least one of the following:

[0041] The quality of the serving cell is lower than or equal to a first threshold;

[0042] The quality change of the serving cell is higher than or equal to a second threshold;

[0043] The quality change rate of the serving cell is greater than or equal to a third threshold;

[0044] The uplink throughput of the terminal is greater than or equal to a fifth threshold;

[0045] The flow rate of the terminal is greater than or equal to a sixth threshold;

[0046] The buffering level of the terminal is greater than or equal to a seventh threshold;

[0047] The quality of serving the relay terminal is lower than or equal to an eighth threshold;

[0048] The quality change of the service relay terminal is lower than or equal to a ninth threshold.

[0049] In the above scheme, the screening event includes at least one of the following:

[0050] The quality of the candidate relay terminal is higher than or equal to a fourth threshold;

[0051] The quality of the candidate cell is higher than or equal to an eleventh threshold;

[0052] The quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to a tenth threshold;

[0053] The quality of the candidate relay terminal is higher than or equal to a fourth threshold, and the quality of the serving relay terminal is lower than or equal to an eighth threshold.

[0054] In the above solution, the situation where the execution condition is met includes at least one of the following:

[0055] The quality of the candidate relay terminal is higher than or equal to a twelfth threshold;

[0056] The quality of the candidate cell is higher than or equal to the thirteenth threshold;

[0057] The uplink throughput of the terminal is greater than or equal to a fourteenth threshold;

[0058] The traffic of the terminal is greater than or equal to a fifteenth threshold;

[0059] The buffering level of the terminal is greater than or equal to a sixteenth threshold;

[0060] The quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to the seventeenth threshold;

[0061] The quality of the candidate relay terminal is higher than or equal to the twelfth threshold, and the quality of the serving relay terminal is higher than or equal to the eighteenth threshold;

[0062] The quality of the candidate relay terminal is higher than or equal to a twelfth threshold, and the quality of the serving cell is higher than or equal to a nineteenth threshold;

[0063] The quality of the candidate cell is higher than or equal to a thirteenth threshold, and the quality of the service relay terminal is higher than or equal to an eighteenth threshold.

[0064] In the above solution, the first information further includes at least one of the following:

[0065] Layer 2 identification of the candidate relay terminal;

[0066] The network identifier of the candidate relay terminal;

[0067] a cell identifier of the candidate cell;

[0068] Indication of primary or secondary connection;

[0069] The selection rules for primary or secondary connections.

[0070] In the above scheme, the method further comprises:

[0071] If the connection with the selected candidate relay terminal and / or candidate cell fails, perform one of the following:

[0072] Sending third information to the first access network device, where the third information includes information related to the connection failure;

[0073] deleting the saved first information;

[0074] Select a cell and / or a relay terminal; if the selected relay terminal and / or cell is one of the candidate relay terminals and / or candidate cells, apply the corresponding configuration information.

[0075] The embodiment of the present application also provides a connection establishment method, which is applied to a first access network device, including:

[0076] First information is sent to the terminal, where the first information at least includes execution conditions and configuration information of the candidate relay terminal and / or the candidate cell.

[0077] In the above scheme, the method further comprises:

[0078] Sending second information to the terminal, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells;

[0079] receiving a measurement report sent by the terminal.

[0080] In the above scheme, the method further comprises:

[0081] Sending fourth information to the second access network device, where the fourth information includes at least one of the following:

[0082] Layer 2 identification of the candidate relay terminal;

[0083] a cell identifier of the candidate cell;

[0084] Public Land Mobile Network (PLMN) logo;

[0085] Sidelink-Reference-Signal Receiving Power (SL-RSRP) or Sidelink-Discovery-Reference-Signal Receiving Power (SD-RSRP) measurement results of the candidate relay terminal;

[0086] The reference signal received power (RSRP) measurement results of the candidate cells;

[0087] Candidate cell list;

[0088] A list of candidate relay terminals;

[0089] Indication of a primary or secondary connection.

[0090] The embodiment of the present application further provides a connection establishment method, which is applied to a second access network device, including:

[0091] Receive fourth information sent by the first access network device; the fourth information includes at least one of the following:

[0092] Layer 2 identification of the candidate relay terminal;

[0093] a cell identifier of the candidate cell;

[0094] PLMN identifier;

[0095] SL-RSRP or SD-RSRP measurement results of candidate relay terminals;

[0096] RSRP measurement results of candidate cells;

[0097] Candidate cell list;

[0098] A list of candidate relay terminals;

[0099] Indication of a primary or secondary connection.

[0100] The embodiment of the present application also provides a terminal, comprising: a first processor and a first communication interface; wherein,

[0101] The first communication interface is used to receive first information, where the first information at least includes execution conditions and configuration information of a candidate relay terminal and / or a candidate cell;

[0102] The first processor is configured to select a candidate relay terminal and / or a candidate cell and apply configuration information of the selected candidate relay terminal and / or candidate cell when the execution condition is met.

[0103] The embodiment of the present application further provides a first access network device, comprising: a second processor and a second communication interface; wherein,

[0104] The second communication interface is used to send first information to the terminal, where the first information at least includes execution conditions and configuration information of the candidate relay terminal and / or the candidate cell.

[0105] The embodiment of the present application further provides a second access network device, including: a third processor and a third communication interface; wherein,

[0106] The third communication interface is used to receive fourth information sent by the first access network device; the fourth information includes at least one of the following:

[0107] Layer 2 identification of the candidate relay terminal;

[0108] a cell identifier of the candidate cell;

[0109] PLMN identifier;

[0110] SL-RSRP or SD-RSRP measurement results of candidate relay terminals;

[0111] RSRP measurement results of candidate cells;

[0112] Candidate cell list;

[0113] A list of candidate relay terminals;

[0114] Indication of a primary or secondary connection.

[0115] The embodiment of the present application further provides a terminal, comprising: a first processor and a first memory for storing a computer program that can be run on the processor,

[0116] Wherein, the first processor is used to execute the steps of any of the above-mentioned terminal side methods when running the computer program.

[0117] The embodiment of the present application further provides a first access network device, comprising: a second processor and a second memory for storing a computer program that can be run on the processor,

[0118] Wherein, the second processor is used to execute the steps of any one of the above-mentioned methods on the first access network device side when running the computer program.

[0119] The embodiment of the present application further provides a second access network device, including: a third processor and a third memory for storing a computer program that can be run on the processor,

[0120] Wherein, the third processor is used to execute the steps of any one of the above-mentioned methods on the second access network device side when running the computer program.

[0121] An embodiment of the present application also provides a storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the computer program implements the steps of any of the above-mentioned methods on the terminal side, or implements the steps of any of the above-mentioned methods on the first access network device side, or implements the steps of any of the above-mentioned methods on the second access network device side.

[0122] The connection establishment method, related equipment and storage medium provided by the embodiment of the present application, the terminal receives the first information, and the first information at least includes the execution conditions and configuration information of the candidate relay terminal and / or the candidate cell; when the execution conditions are met, the candidate relay terminal and / or the candidate cell are selected, and the configuration information of the selected candidate relay terminal and / or the candidate cell is applied. The technical solution provided by the embodiment of the present application, the terminal can evaluate whether the execution conditions are met, and when the execution conditions are met, the candidate relay terminal or the candidate cell is automatically selected, and the corresponding configuration information is applied, that is, the terminal establishes a connection (also referred to as a path) with the selected candidate relay terminal or candidate cell. In this way, even in a scenario where the channel conditions change quickly, the terminal can select a suitable candidate relay terminal or candidate cell based on the execution conditions and establish a connection, thereby improving the success rate of connection establishment. BRIEF DESCRIPTION OF THE DRAWINGS

[0123] Figure 1 It is a schematic diagram of the structure of SL relay transmission;

[0124] Figure 2 This is a schematic diagram of the first connection establishment method of the present application embodiment;

[0125] Figure 3 This is a flow chart of a method for establishing a second connection according to an embodiment of the present application;

[0126] Figure 4 This is a schematic diagram of the structure of the first connection establishment device in the embodiment of the present application;

[0127] Figure 5 This is a schematic diagram of the structure of the second connection establishment device in the embodiment of the present application;

[0128] Figure 6 This is a schematic diagram of the terminal structure of an embodiment of the present application;

[0129] Figure 7 This is a schematic diagram of the structure of the first access network device in the embodiment of the present application;

[0130] Figure 8 This is a schematic diagram of the structure of the second access network device in the embodiment of the present application;

[0131] Fig. 9 A schematic diagram of the system structure is established for connecting the embodiments of the present application. DETAILED DESCRIPTION

[0132] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0133] In the related art, the configuration method of multiple paths is usually to first establish a path and then add a second path; wherein, the second path is decided by the base station whether to add it. Specifically, the base station can determine whether to add the second path based on the measurement report reported by the remote UE. For example, when the remote UE is at the edge of the cell, the remote UE accesses the network through the relay UE; when the remote UE moves into the coverage area of ​​the cell, the base station determines that the Uu port can meet the communication requirements based on the reported measurement report, and then determines to add a second path (i.e., a direct path); in the above scenario, the direct path defaults to the main path between the remote UE and the base station (also called the main connection, which can be expressed as Primary Path in English), and the non-direct path is an auxiliary path or auxiliary connection.

[0134] From the above description, it can be seen that the relevant path adding mechanism is that the base station decides whether to add the second path based on the measurement report reported by the remote UE. However, the above path adding mechanism is not applicable to scenarios where the channel quality changes quickly, such as high-frequency deployment or high-speed terminal movement. This is because: there is a delay in the process of information transmission between the remote UE and the base station. When the base station makes a judgment based on the current measurement report received, the channel quality may have changed, resulting in the failure of path adding.

[0135] Based on this, in various embodiments of the present application, when a path has been established, the terminal evaluates according to the issued execution conditions, automatically selects a candidate relay terminal or a candidate cell when the execution conditions are met, and establishes a second path with the selected candidate relay terminal or candidate cell. In this way, the success rate of path establishment is guaranteed in scenarios where channel conditions change rapidly.

[0136] The present application embodiment provides a connection establishment method, which is applied to a terminal, such as Figure 2 As shown, the method includes:

[0137] Step 201: receiving first information, wherein the first information at least includes execution conditions and configuration information of a candidate relay terminal and / or a candidate cell;

[0138] Step 202: When the execution condition is met, a candidate relay terminal and / or a candidate cell is selected, and configuration information of the selected candidate relay terminal and / or candidate cell is applied.

[0139] In actual application, the terminal can be called UE, remote terminal, terminal equipment, equipment or user, etc. The embodiment of the present application does not limit the name of the terminal as long as its function is realized.

[0140] It should be noted that, in the embodiment of the present application, a first connection has been established (which can also be understood as added) between the terminal and the first access network device; wherein, the first connection can also be referred to as a first path, which can be a non-direct path or a direct path; the first access network device can be a base station, which can be referred to as a serving base station or a source base station. That is to say, in the scenario where the first connection is a direct path, the terminal is connected to the first access network device through the Uu port; in the scenario where the first connection is a non-direct path, the terminal is connected to the first access network device through the first relay terminal.

[0141] Here, before step 201, the network side may send measurement related information to the terminal so that the terminal can subsequently establish a second connection (referred to as the second connection in the following description) to obtain services through multiple connections (specifically including the first connection and the second connection).

[0142] Based on this, in one embodiment, the method may further include:

[0143] receiving second information sent by the first access network device, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells;

[0144] Send a measurement report to the first access network device.

[0145] In actual application, the terminal may send the fifth information to the first access network device to request configuration of measurement and / or connection establishment related information; after receiving the fifth information, the first access network device may send the second information to the terminal. In addition, the first access network device may also actively send the second information to the terminal.

[0146] Specifically, in a scenario where the first connection is a direct connection path, the terminal may send fifth information to the first access network device through the Uu port to request configuration of connection establishment related information, and the measurement and / or connection establishment related information may include measurement capabilities, indication information supporting connection establishment, the number of relay terminals supporting connection establishment and relay terminal related information, etc.

[0147] In the scenario where the first connection is a non-direct connection path, the terminal may send fifth information to the first access network device through the first relay terminal to request measurement and / or configuration of connection establishment related information, and the measurement and / or connection establishment related information may include measurement capabilities, indication information supporting connection establishment, the number of relay terminals supporting connection establishment, relay terminal related information, and indication information supporting multiple non-direct connection paths, etc.

[0148] Specifically, in one embodiment, the second information may include at least one of the following:

[0149] Measurement trigger events;

[0150] Measurement and reporting of events;

[0151] Discovery events of candidate relay terminals and / or candidate cells;

[0152] Screening events of candidate relay terminals and / or candidate cells;

[0153] Report the number of candidate relay terminals and / or candidate cells.

[0154] In actual application, when the discovery event is met, the terminal can trigger the discovery of candidate relay terminals and / or candidate cells.

[0155] Specifically, in one embodiment, the discovery event includes at least one of the following:

[0156] The quality of the serving cell is lower than or equal to a first threshold;

[0157] A quality change (which can be expressed as an offset in English) of the serving cell is greater than or equal to a second threshold;

[0158] The quality change rate of the serving cell is greater than or equal to a third threshold;

[0159] The uplink throughput of the terminal is greater than or equal to a fifth threshold;

[0160] The flow rate of the terminal is greater than or equal to a sixth threshold;

[0161] The buffer level of the terminal is greater than or equal to a seventh threshold;

[0162] The quality of serving the relay terminal is lower than or equal to an eighth threshold;

[0163] The quality change of the service relay terminal is lower than or equal to a ninth threshold.

[0164] The quality of the service relay terminal may include the quality of proximity communication (PC5), such as SL-RSRP, SD-RSRP, etc. In addition, the service cell may be understood as the cell currently accessed by the terminal when the first connection is a direct path, and the service relay terminal may be understood as the relay terminal to which the terminal is connected when the first connection is an indirect path, that is, the first relay terminal.

[0165] In actual application, in the scenario where the first connection is a direct connection path, the discovery event may include at least one of the quality of the service cell being lower than or equal to a first threshold, the quality change of the service cell being higher than or equal to a second threshold, the quality change rate of the service cell being greater than or equal to a third threshold, the uplink throughput of the terminal being greater than or equal to a fifth threshold, the traffic of the terminal being greater than or equal to a sixth threshold, and the buffering level of the terminal being greater than or equal to a seventh threshold; wherein the values ​​of the first threshold, the second threshold, the third threshold, the fifth threshold, the sixth threshold, and the seventh threshold depend on the configuration of the first access network device, and the embodiments of the present application are not limited to this.

[0166] In actual application, in the scenario where the first connection is a non-direct connection path, the discovery event may include at least one of the quality of the service relay terminal being lower than or equal to the eighth threshold, the quality change of the service relay terminal being lower than or equal to the ninth threshold, and the uplink throughput of the terminal being greater than or equal to the fifth threshold; wherein the values ​​of the eighth threshold and the ninth threshold depend on the configuration of the first access network device, and the embodiment of the present application is not limited to this.

[0167] In actual application, when the measurement triggering event is met, the terminal starts to measure the candidate relay terminals and / or candidate cells and obtains the measurement results.

[0168] Specifically, in one embodiment, the measurement triggering event may include at least one of the following:

[0169] The quality of the serving cell is lower than or equal to a first threshold;

[0170] The quality change of the serving cell is higher than or equal to a second threshold;

[0171] The quality change rate of the serving cell is greater than or equal to a third threshold;

[0172] The uplink throughput of the terminal is greater than or equal to a fifth threshold;

[0173] The flow rate of the terminal is greater than or equal to a sixth threshold;

[0174] The buffering level of the terminal is greater than or equal to a seventh threshold;

[0175] The quality of serving the relay terminal is lower than or equal to an eighth threshold;

[0176] The quality change of the service relay terminal is lower than or equal to a ninth threshold.

[0177] Here, in the scenario where the first connection is a direct path, the measurement trigger event includes at least one of the following: the quality of the serving cell is lower than or equal to a first threshold, the quality change of the serving cell is higher than or equal to a second threshold, the quality change rate of the serving cell is greater than or equal to a third threshold, the uplink throughput of the terminal is greater than or equal to a fifth threshold, the traffic of the terminal is greater than or equal to a sixth threshold, and the buffering level of the terminal is greater than or equal to a seventh threshold.

[0178] In the scenario where the first connection is a non-direct path, the measurement trigger event includes at least one of the quality of the service relay terminal being lower than or equal to an eighth threshold, the quality change of the service relay terminal being lower than or equal to a ninth threshold, and the uplink throughput of the terminal being greater than or equal to a fifth threshold.

[0179] In actual application, when the screening event is met, the terminal screens candidate relay terminals and / or candidate cells.

[0180] Specifically, in one embodiment, the screening event may include at least one of the following:

[0181] The quality of the candidate relay terminal is higher than or equal to a fourth threshold;

[0182] The quality of the candidate cell is higher than or equal to an eleventh threshold;

[0183] The quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to a tenth threshold;

[0184] The quality of the candidate relay terminal is higher than or equal to a fourth threshold, and the quality of the serving relay terminal is lower than or equal to an eighth threshold.

[0185] The quality of the candidate relay terminal may include PC5 quality, such as SL-RSRP, SD-RSRP, etc.

[0186] In actual application, in the scenario where the first connection is a direct path, the screening event may include the quality of the candidate relay terminal being higher than or equal to a fourth threshold; wherein the value of the fourth threshold depends on the configuration of the first access network device, which is not limited in this embodiment of the present application.

[0187] In the scenario where the first connection is a non-direct path, the screening event may include at least one of the following: the quality of the candidate cell is higher than or equal to the eleventh threshold, the quality change between the candidate relay terminal and the service relay terminal is higher than and equal to the tenth threshold, and the quality of the candidate relay terminal is higher than or equal to the fourth threshold, and the quality of the service relay terminal is lower than or equal to the eighth threshold; wherein the values ​​of the tenth threshold and the eleventh threshold depend on the configuration of the first access network device, and the embodiments of the present application are not limited to this.

[0188] In actual application, when the measurement reporting event is met, the terminal can be triggered to perform measurement reporting of the candidate relay terminal and / or candidate cell.

[0189] Specifically, in one embodiment, the measurement reporting event may include at least one of the following:

[0190] The quality of the serving cell is lower than or equal to a first threshold;

[0191] The quality change of the serving cell is higher than or equal to a second threshold;

[0192] The quality change rate of the serving cell is greater than or equal to a third threshold;

[0193] The quality of the candidate relay terminal is higher than or equal to a fourth threshold;

[0194] The uplink throughput of the terminal is greater than or equal to a fifth threshold;

[0195] The flow rate of the terminal is greater than or equal to a sixth threshold;

[0196] The buffering level of the terminal is greater than or equal to a seventh threshold;

[0197] The quality of serving the relay terminal is lower than or equal to an eighth threshold;

[0198] The quality change of the service relay terminal is lower than or equal to a ninth threshold;

[0199] The quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to the tenth threshold;

[0200] The quality of the candidate relay terminal is greater than or equal to a fourth threshold, and the quality of the serving relay terminal is less than or equal to an eighth threshold;

[0201] The quality of the candidate cell is higher than or equal to an eleventh threshold.

[0202] In actual application, in the scenario where the first connection is a direct connection path, the measurement reporting event may include at least one of the quality of the serving cell being lower than or equal to a first threshold, the quality change of the serving cell being higher than or equal to a second threshold, the quality of the candidate relay terminal being higher than or equal to a fourth threshold, the uplink throughput of the terminal being greater than or equal to a fifth threshold, the traffic of the terminal being greater than or equal to a sixth threshold, and the buffering level of the terminal being greater than or equal to a seventh threshold.

[0203] In actual application, in the scenario where the first connection is a non-direct connection path, the measurement reporting event may include the quality of the serving cell being lower than or equal to the first threshold, the quality of the candidate relay terminal being higher than or equal to the fourth threshold, the uplink throughput of the terminal being greater than or equal to the fifth threshold, the traffic of the terminal being greater than or equal to the sixth threshold, the buffering level of the terminal being greater than or equal to the seventh threshold, the quality of the serving relay terminal being lower than or equal to the eighth threshold, the quality change between the candidate relay terminal and the serving relay terminal being greater than or equal to the tenth threshold, the quality of the candidate relay terminal being greater than or equal to the fourth threshold, and the quality of the serving relay terminal being lower than or equal to at least one of the eighth threshold.

[0204] Here, after the terminal triggers the measurement report, the measurement report can be reported to the first access network device; wherein the measurement report can include the measurement results of the candidate relay terminal and / or the candidate cell, the layer 2 identifier of the candidate relay terminal (which can be expressed as L2 ID in English), the network identifier of the candidate relay terminal (such as PLMN ID), the cell identifier of the candidate cell (which can be expressed as cell ID in English), etc. The embodiment of the present application does not limit the specific content of the measurement report.

[0205] Here, in actual application, the network side can also indicate the number of candidate relay terminals and / or candidate cells reported by the terminal. For example, assuming that the terminal measures 10 candidate relay terminals, and the network side instructs the terminal to report measurement reports of 8 candidate relay terminals, then the terminal can select 8 candidate relay terminals with good quality for reporting based on the measurement reports of the 10 candidate relay terminals, in descending order of quality.

[0206] In actual application, after reporting the measurement report, the terminal can receive the first information sent by the first access network device.

[0207] In one embodiment, the first information may further include at least one of the following:

[0208] Layer 2 identification of the candidate relay terminal;

[0209] The network identifier of the candidate relay terminal;

[0210] a cell identifier of the candidate cell;

[0211] Indication of primary or secondary connection;

[0212] The selection rules for primary or secondary connections.

[0213] In actual application, the indication information of the main connection is used to indicate the main connection, such as indicating that the first connection is the main connection, and the indication information of the auxiliary connection is used to indicate the auxiliary connection. In addition, the selection rule of the main connection can be understood as the method of selecting the main connection, such as when the first connection and the second connection are both non-direct connection paths, the connection with high SL-RSRP or SD-RSRP quality is used as the main connection; the selection rule of the auxiliary connection can be understood as the method of selecting the auxiliary connection.

[0214] Here, when one connection is a direct connection path and the other connection is an indirect connection path, the direct connection path may be defaulted as the primary connection.

[0215] In actual application, the first connection and the second connection can be specifically divided into three different scenarios. In the first scenario, the first connection is a direct path, and the second connection is an indirect path; in the second scenario, the first connection is an indirect path, and the second connection is a direct path; in the third scenario, the first connection is an indirect path, and the second connection is an indirect path. In the third scenario, the network side may send indication information of the main connection or the auxiliary connection and / or the selection rules of the main connection or the auxiliary connection to the terminal to indicate the main connection. In the first scenario and the second scenario, the terminal may default to the direct path as the main connection. Of course, the network side may also send indication information of the main connection or the auxiliary connection and / or the selection rules of the main connection or the auxiliary connection to the terminal, and the embodiments of the present application are not limited to this.

[0216] In actual application, in step 202, after the terminal receives the execution conditions and configuration information of the candidate relay terminal and / or the candidate cell, it starts to evaluate the execution conditions. When the execution conditions of the candidate relay terminal and / or the candidate cell are met, the configuration information is applied to establish the second connection; wherein, the configuration information may include system messages necessary to establish the connection, random access related information, etc., and the specific content of the configuration information is not limited in the embodiment of the present application.

[0217] Specifically, in one embodiment, the situation where the execution condition is met includes at least one of the following:

[0218] The quality of the candidate relay terminal is higher than or equal to a twelfth threshold;

[0219] The quality of the candidate cell is higher than or equal to the thirteenth threshold;

[0220] The uplink throughput of the terminal is greater than or equal to a fourteenth threshold;

[0221] The traffic of the terminal is greater than or equal to a fifteenth threshold;

[0222] The buffering level of the terminal is greater than or equal to a sixteenth threshold;

[0223] The quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to the seventeenth threshold;

[0224] The quality of the candidate relay terminal is higher than or equal to the twelfth threshold, and the quality of the serving relay terminal is higher than or equal to the eighteenth threshold;

[0225] The quality of the candidate relay terminal is higher than or equal to a twelfth threshold, and the quality of the serving cell is higher than or equal to a nineteenth threshold;

[0226] The quality of the candidate cell is higher than or equal to a thirteenth threshold, and the quality of the service relay terminal is higher than or equal to an eighteenth threshold.

[0227] Among them, in actual application, the execution condition can be configured for each candidate relay terminal and / or candidate cell, that is, the network side configures different events and / or thresholds for different candidate relay terminals and / or candidate cells; the execution condition can also be applicable to all candidate relay terminals and / or candidate cells, that is, the network side configures the same events and / or thresholds for all candidate relay terminals and / or candidate cells, and the embodiments of the present application are not limited to this.

[0228] In the above execution conditions, the uplink throughput, flow and buffer level of the terminal are configured as execution conditions. This is because: when the amount of uplink data of the terminal is large, establishing two connections is more conducive to the data transmission of the terminal, thereby improving the user experience.

[0229] In the related technology, only the multipath scenario of the same base station (intra-gNB) is supported, that is, the terminal establishes multiple connections with the same access network device, and the multipath scenario between base stations (inter-gNB) is not supported, that is, the terminal establishes multiple connections with different access network devices. In addition, for the same access network device, only one direct path and one indirect path are supported, and two indirect paths are not supported.

[0230] In the embodiment of the present application, for the second connection, the terminal can establish a second connection with the first access network device. In this scenario, the terminal establishes multiple connections with the same access network device. In addition, the terminal can also establish a second connection with a second access network device (specifically, a base station, which can be called a target base station). In this scenario, the terminal can establish multiple connections with different base stations, thereby realizing a multipath scenario between base stations.

[0231] In the above two scenarios, the second connection can be a direct path or an indirect path. When the second connection is a direct path, the terminal can access the candidate cell, that is, establish a radio resource control (RRC) connection with the candidate cell. When the second connection is an indirect path, the terminal can establish a PC5 connection with the candidate relay terminal. That is to say, for the same access network device, when the first connection is an indirect path, the second connection can also be an indirect path, that is, the embodiment of the present application supports the establishment of two indirect paths.

[0232] In actual application, in the first scenario, the execution conditions may include at least one of the uplink throughput of the terminal being greater than or equal to the fourteenth threshold, the traffic of the terminal being greater than or equal to the fifteenth threshold, the buffering level of the terminal being greater than or equal to the sixteenth threshold, and the quality of the candidate relay terminal being higher than or equal to the twelfth threshold; wherein the values ​​of the twelfth threshold, the fourteenth threshold and the fifteenth threshold depend on the network side configuration, and the embodiments of the present application are not limited to this.

[0233] Exemplarily, assuming that the execution condition configured by the network side for candidate relay terminal 1 is that the quality of the candidate relay terminal is higher than or equal to the twelfth threshold (referred to as condition 1), and different candidate relay terminals are configured with different conditions 1, when the SL-RSRP or SD-RSRP quality of candidate relay terminal 1 measured by the terminal meets condition 1, the terminal selects candidate relay terminal 1, applies the corresponding configuration, and establishes a PC5 connection with candidate relay terminal 1.

[0234] Exemplarily, it is assumed that the execution conditions configured by the network side for the candidate relay terminal 2 are that the quality of the candidate relay terminal is higher than or equal to the twelfth threshold (referred to as condition 1) and the uplink throughput of the terminal is greater than or equal to the fourteenth threshold (referred to as condition 2), and different candidate relay terminals are configured with different conditions 1, and all candidate terminals are configured with the same condition 2. When the SL-RSRP or SD-RSRP quality of the candidate relay terminal 2 measured by the terminal satisfies condition 1, and the uplink throughput of the terminal satisfies condition 2, the terminal selects the candidate relay terminal 2, applies the corresponding configuration, and establishes a PC5 connection with the candidate relay terminal 2.

[0235] Exemplarily, assuming that the execution condition configured by the network side for the candidate relay terminal 3 is that the quality of the candidate relay terminal is higher than or equal to the twelfth threshold (referred to as condition 1), and all candidate relay terminals are configured with the same condition 1, when the SL-RSRP or SD-RSRP quality of the candidate relay terminal 3 measured by the terminal meets condition 1, the terminal selects the candidate relay terminal 3, applies the corresponding configuration, and establishes a PC5 connection with the candidate relay terminal 3.

[0236] Exemplarily, assuming that the execution condition configured on the network side is that the uplink throughput of the terminal is greater than or equal to the fourteenth threshold, or the traffic of the terminal is greater than or equal to the fifteenth threshold, or the buffering level of the terminal is greater than or equal to the sixteenth threshold (referred to as condition 2), and all candidate relay terminals are configured with the same condition 2, when the uplink throughput, traffic or buffering level of the terminal meets condition 2, considering that the network side does not directly configure the conditions for selecting the candidate relay terminals, the terminal can select the candidate relay terminal with the highest PC5 quality, and apply the corresponding configuration to establish a PC5 connection with the selected candidate relay terminal.

[0237] Exemplarily, assuming that the execution conditions configured on the network side are that the quality of the candidate relay terminal is higher than or equal to the twelfth threshold (referred to as condition 1) and the uplink throughput of the terminal is greater than or equal to the fourteenth threshold, or the traffic of the terminal is greater than or equal to the fifteenth threshold, or the buffering level of the terminal is greater than or equal to the sixteenth threshold (referred to as condition 2), and all candidate relay terminals are configured with the same conditions 1 and 2. When the SL-RSRP or SD-RSRP quality of the candidate relay terminal measured by the terminal meets condition 1, and at the same time, the uplink throughput, traffic or buffering level of the terminal meets condition 2, the candidate relay terminal with the highest PC5 quality that meets condition 1 is selected, or, according to the preset conditions, one candidate relay terminal is selected from the candidate relay terminals that meet condition 1, and the corresponding configuration is applied to establish a PC5 connection with the selected candidate relay terminal.

[0238] Here, when multiple candidate relay terminals meet the execution condition, the terminal may select a candidate relay terminal according to a preset condition, such as selecting a candidate relay terminal with the highest PC5 quality; or, which candidate relay terminal is selected depends on the implementation of the terminal.

[0239] In addition, when the terminal establishes a connection with the selected candidate relay terminal, the evaluation of other candidate relay terminals is stopped.

[0240] In actual application, in the second scenario, the execution conditions may include the quality of the candidate cell being higher than or equal to the thirteenth threshold, the uplink throughput of the terminal being greater than or equal to the fourteenth threshold, the traffic of the terminal being greater than or equal to the fifteenth threshold, the quality of the candidate cell being higher than or equal to the thirteenth threshold, and the quality of the service relay terminal being higher than or equal to the eighteenth threshold and the buffering level of the terminal being greater than or equal to at least one of the sixteenth threshold; wherein the values ​​of the thirteenth threshold and the sixteenth threshold depend on the network side configuration, and the embodiments of the present application are not limited to this.

[0241] Exemplarily, assuming that the execution condition configured by the network side for candidate cell 1 is that the quality of the candidate cell is higher than or equal to the thirteenth threshold (referred to as condition 1), and different candidate cells are configured with different conditions 1, when the RSRP quality of candidate cell 1 measured by the terminal meets condition 1, the terminal selects candidate cell 1, applies the corresponding configuration, and establishes a second connection with candidate cell 1.

[0242] Exemplarily, assuming that the execution condition configured by the network side for candidate cell 2 is that the quality of the candidate cell is higher than or equal to the thirteenth threshold (referred to as condition 1), and all candidate cells are configured with the same condition 1, when the RSRP quality of candidate cell 2 measured by the terminal meets condition 1, the terminal selects candidate cell 2, applies the corresponding configuration, and establishes a second connection with candidate cell 2.

[0243] Exemplarily, assuming that the execution condition configured by the network side for candidate cell 3 is that the quality of the candidate cell is higher than or equal to the thirteenth threshold, and the quality of the service relay terminal is higher than or equal to the eighteenth threshold (referred to as condition 1), and all candidate cells are configured with the same condition 1, when the RSRP quality of candidate cell 3 and the service relay terminal measured by the terminal meets condition 1, the terminal selects candidate cell 3, applies the corresponding configuration, and establishes a second connection with candidate cell 3.

[0244] Exemplarily, assuming that the execution condition configured by the network side for candidate cell 4 is that the quality of the candidate cell is higher than or equal to the thirteenth threshold, and the quality of the service relay terminal is higher than or equal to the eighteenth threshold (referred to as condition 1), and different candidate cells are configured with different conditions 1, when the RSRP quality of the candidate cell 4 and the service relay terminal measured by the terminal meets condition 1, the terminal selects candidate cell 4, applies the corresponding configuration, and establishes a second connection with candidate cell 4.

[0245] Exemplarily, the execution condition configured on the network side is that the uplink throughput of the terminal is greater than or equal to the fourteenth threshold, or the traffic of the terminal is greater than or equal to the fifteenth threshold, or the buffer level of the terminal is greater than or equal to the sixteenth threshold (referred to as condition 2), and all candidate cells are configured with the same condition 2. When the uplink throughput, traffic or buffer level of the terminal meets condition 2, considering that the network side does not directly configure the conditions for selecting the candidate cell, the terminal can select the candidate cell with the highest cell quality, and apply the corresponding configuration to establish a second connection with the selected candidate cell.

[0246] Exemplarily, it is assumed that the execution conditions configured by the network side for candidate cell 5 are that the quality of the candidate cell is higher than or equal to the twelfth threshold (referred to as condition 1) and the uplink throughput of the terminal is greater than or equal to the fourteenth threshold (referred to as condition 2), and different candidate cells are configured with different conditions 1, and all candidate cells are configured with the same condition 2. When the RSRP quality of candidate cell 5 measured by the terminal meets condition 1, and at the same time, the uplink throughput of the terminal meets condition 2, the terminal selects candidate cell 5, applies the corresponding configuration, and establishes a second connection with candidate cell 5.

[0247] Exemplarily, assuming that the execution conditions configured on the network side are that the quality of the candidate cell is higher than or equal to the twelfth threshold (referred to as condition 1) and the uplink throughput of the terminal is greater than or equal to the fourteenth threshold, or the traffic of the terminal is greater than or equal to the fifteenth threshold, or the buffering level of the terminal is greater than or equal to the sixteenth threshold (referred to as condition 2), and all candidate cells are configured with the same condition 1 and condition 2. When the RSRP quality of the candidate cell measured by the terminal meets condition 1, and at the same time, the uplink throughput, traffic or buffering level of the terminal meets condition 2, the candidate cell with the highest cell quality that meets condition 1 is selected, or, according to preset conditions, one candidate cell is selected from the candidate cells that meet condition 1, and the corresponding configuration is applied to establish a second connection with the selected candidate cell.

[0248] Here, when multiple candidate cells meet the execution condition, the terminal may select a candidate cell according to a preset condition, such as selecting a candidate cell with the highest cell quality; or, which candidate cell to select depends on the implementation of the terminal.

[0249] In addition, when the terminal establishes a connection with the selected candidate cell, it stops evaluating other candidate cells.

[0250] In actual application, in the third scenario, the execution conditions may include at least one of the following: the quality of the candidate relay terminal is higher than or equal to the twelfth threshold, the quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to the seventeenth threshold, the quality of the candidate relay terminal is higher than or equal to the twelfth threshold, and the quality of the serving relay terminal is higher than or equal to the eighteenth threshold, the quality of the candidate relay terminal is higher than or equal to the twelfth threshold, and the quality of the serving cell is higher than or equal to the nineteenth threshold, and the quality of the candidate cell is higher than or equal to the thirteenth threshold, and the quality of the serving relay terminal is higher than or equal to the eighteenth threshold, the uplink throughput of the terminal is greater than or equal to the fourteenth threshold, the traffic of the terminal is greater than or equal to the fifteenth threshold, and the buffering level of the terminal is greater than or equal to the sixteenth threshold; wherein, the values ​​of the seventeenth threshold, the eighteenth threshold and the nineteenth threshold depend on the network side configuration, and the embodiments of the present application are not limited to this.

[0251] Exemplarily, assuming that the execution condition configured by the network side for candidate relay terminal 1 is that the quality of the candidate relay terminal is higher than or equal to the twelfth threshold (referred to as condition 1), when the SL-RSRP or SD-RSRP quality of candidate relay terminal 1 measured by the terminal meets condition 1, the terminal selects candidate relay terminal 1, applies the corresponding configuration, and establishes a PC5 connection with candidate relay terminal 1.

[0252] Exemplarily, assuming that the execution condition configured by the network side for candidate relay terminal 2 is that the quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to the seventeenth threshold (referred to as condition 2), when the SL-RSRP or SD-RSRP quality of the candidate relay terminal 2 and the serving relay terminal measured by the terminal meets condition 2, the terminal selects candidate relay terminal 2, applies the corresponding configuration, and establishes a PC5 connection with candidate relay terminal 2.

[0253] Exemplarily, assuming that the execution condition configured by the network side for the candidate relay terminal 3 is that the quality of the candidate relay terminal is higher than or equal to the twelfth threshold, and the quality of the serving relay terminal is higher than or equal to the eighteenth threshold, or the quality of the candidate relay terminal is higher than or equal to the twelfth threshold, and the quality of the serving cell is higher than or equal to the nineteenth threshold (referred to as condition 3), when the quality of the candidate relay terminal 3, the serving relay terminal or the serving cell measured by the terminal meets condition 3, the terminal selects the candidate relay terminal 3, applies the corresponding configuration, and establishes a PC5 connection with the candidate relay terminal 3.

[0254] Exemplarily, it is assumed that the execution condition configured by the network side for the candidate relay terminal 4 is that the quality of the candidate relay terminal is higher than or equal to the twelfth threshold (referred to as condition 1), or the quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to the seventeenth threshold (referred to as condition 2), or the quality of the candidate relay terminal is higher than or equal to the twelfth threshold, and the quality of the serving relay terminal is higher than or equal to the eighteenth threshold, the quality of the candidate relay terminal is higher than or equal to the twelfth threshold, and the quality of the serving cell is higher than or equal to the nineteenth threshold (referred to as condition 3), or the uplink throughput of the terminal is greater than or equal to the fourteenth threshold, or the flow of the terminal is greater than or equal to the fifteenth threshold, or the terminal The buffering level of the terminal is greater than or equal to the sixteenth threshold (referred to as condition 4). When the SL-RSRP or SD-RSRP quality of the candidate relay terminal 2 measured by the terminal meets condition 1, or the SL-RSRP or SD-RSRP quality of the candidate relay terminal 2 and the serving relay terminal, and the RSRP quality of the serving cell meet condition 2, or the SL-RSRP or SD-RSRP quality of the candidate relay terminal 2 and the RSRP quality of the serving cell meet condition 3, and / or the uplink throughput, traffic or buffering level of the terminal meets condition 4, the terminal selects candidate relay terminal 4, applies corresponding configuration, and establishes PC5 connection with candidate relay terminal 4.

[0255] Here, when multiple candidate relay terminals meet the execution condition, the terminal may select a candidate relay terminal according to a preset condition, such as selecting a candidate relay terminal with the highest PC5 quality; or, which candidate relay terminal is selected depends on the implementation of the terminal.

[0256] After the second connection is established, the terminal may delete the stored first information. At the same time, the terminal may also send sixth information to the first access network device so that the first access network device can learn that the second connection is established. The sixth information may include information such as the layer 2 identifier and the serving cell identifier of the selected candidate relay terminal. In addition, if the selected candidate relay terminal or candidate cell belongs to the second access network device, the terminal may also send sixth information to the second access network device, and the second access network device may notify the first access network device that the terminal has established the second connection with the second access network device.

[0257] Correspondingly, after receiving the sixth information, the first access network device notifies other candidate relay terminals or other access network devices to cancel or release the conditional addition to delete the context information of the terminal and the configuration information of the candidate relay terminal / candidate cell, thereby saving resources of other candidate relay terminals or other access network devices.

[0258] In actual application, during the process of establishing the second connection, there may be a situation where the connection establishment fails.

[0259] Based on this, in one embodiment, the method may further include:

[0260] If the connection with the selected candidate relay terminal and / or candidate cell fails, perform one of the following:

[0261] Sending third information to the first access network device, where the third information includes information related to the connection failure;

[0262] deleting the saved first information;

[0263] Select a cell and / or a relay terminal; if the selected relay terminal and / or cell is one of the candidate relay terminals and / or candidate cells, apply the corresponding configuration information.

[0264] In actual application, if the connection with the selected candidate relay terminal and / or candidate cell fails, the terminal may send the third information to the first access network device so that the first access network device can be informed of the failure to establish the second connection.

[0265] In addition, the terminal can also perform cell selection and / or relay terminal selection. If the selected cell and / or relay terminal is one of the candidate relay terminals and / or candidate cells configured by the network, then the terminal can apply the saved configuration information corresponding to the cell and / or relay terminal, thereby establishing the second connection, which is conducive to the rapid recovery of the second connection.

[0266] Accordingly, the embodiment of the present application also provides a connection establishment method, which is applied to a first access network device, such as Figure 3 As shown, the method includes:

[0267] Step 301: Sending second information to the terminal, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells;

[0268] Step 302: receiving a measurement report sent by the terminal;

[0269] Step 303: Send first information to the terminal, where the first information at least includes execution conditions and configuration information of the candidate relay terminal and / or the candidate cell.

[0270] In actual application, before step 301, after the first access network device receives the fifth information sent by the terminal, it sends the second information to the terminal.

[0271] Based on this, in one embodiment, the method may further include:

[0272] Sending second information to the terminal, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells;

[0273] receiving a measurement report sent by the terminal.

[0274] Here, after the first access network device receives the measurement report sent by the terminal, it can select a candidate relay terminal and / or a candidate cell based on the measurement report; if the candidate relay terminal and / or the candidate cell belongs to the first access network device, the first access network device can configure the first information based on the measurement report.

[0275] If the candidate relay terminal and / or the candidate cell belongs to the second access network device, the first access network device may send fourth information to the second access network device, and the second access network device may select the candidate relay terminal and / or the candidate cell; wherein the fourth information may be sent by way of a switching request message or an auxiliary node adding a small message or introducing a new message.

[0276] Based on this, in one embodiment, the method may further include:

[0277] Sending fourth information to the second access network device, where the fourth information includes at least one of the following:

[0278] Layer 2 identification of the candidate relay terminal;

[0279] a cell identifier of the candidate cell;

[0280] PLMN identifier;

[0281] SL-RSRP or SD-RSRP measurement results of candidate relay terminals;

[0282] RSRP measurement results of candidate cells;

[0283] Candidate cell list;

[0284] A list of candidate relay terminals;

[0285] Indication of a primary or secondary connection.

[0286] In actual application, when the candidate relay terminal and / or the candidate cell belongs to the second access network device, the execution condition may be configured by the first access network or by the second access network.

[0287] The first access network device can send execution conditions and configuration information of candidate relay terminals and / or candidate cells to the terminal, so that the terminal automatically adds candidate relay terminals and / or candidate cells to establish connections when the execution conditions are met. In this way, the possibility of multi-path addition failure due to rapid changes in channel conditions can be reduced.

[0288] Accordingly, an embodiment of the present application further provides a connection establishment method, which is applied to a second access network device, and the method includes:

[0289] Receive fourth information sent by the first access network device; the fourth information includes at least one of the following:

[0290] Layer 2 identification of the candidate relay terminal;

[0291] a cell identifier of the candidate cell;

[0292] PLMN identifier;

[0293] SL-RSRP or SD-RSRP measurement results of candidate relay terminals;

[0294] RSRP measurement results of candidate cells;

[0295] Candidate cell list;

[0296] A list of candidate relay terminals;

[0297] Indication of a primary or secondary connection.

[0298] In actual application, after receiving the fourth information, the second access network device can select and configure candidate relay terminals and / or candidate cells.

[0299] Specifically, after selecting a candidate cell, the second access network device may send seventh information to the first access network device, wherein the seventh information may include information such as a cell identifier and configuration information of the selected candidate cell.

[0300] In addition, after the second access network device selects the candidate relay terminal, it can send eighth information to the first access network device, wherein the eighth information can include information such as the layer 2 identification and configuration information of the selected candidate relay terminal. At the same time, the second access network device can also send ninth information to the candidate relay terminal, wherein the ninth information includes the identification of the terminal, PC5 configuration information (such as media access control (MAC), radio link control (RLC) or physical layer (PHY) related information).

[0301] In the connection establishment method provided by the embodiment of the present application, the terminal receives the first information, and the first information at least includes the execution conditions and configuration information of the candidate relay terminal and / or the candidate cell; when the execution conditions are met, the candidate relay terminal and / or the candidate cell are selected, and the configuration information of the selected candidate relay terminal and / or the candidate cell is applied. In the technical solution provided by the embodiment of the present application, the terminal can evaluate whether the execution conditions are met, and when the execution conditions are met, the candidate relay terminal or the candidate cell is automatically selected, and the corresponding configuration information is applied, that is, the terminal establishes a connection with the selected candidate relay terminal or the candidate cell. In this way, even in a scenario where the channel conditions change quickly, the terminal can select a suitable candidate relay terminal or candidate cell based on the execution conditions and establish a connection, thereby improving the success rate of connection establishment.

[0302] That is to say, in the solution provided in the embodiment of the present application, the terminal measures the quality of the candidate relay terminal or candidate cell, the service relay terminal or service cell according to the configuration on the network side, and automatically adds the candidate relay terminal or candidate cell when the issued execution conditions are met. In this way, the failure of multi-path addition caused by the rapid change of channel conditions can be avoided.

[0303] In order to implement the method of the embodiment of the present application, the embodiment of the present application also provides a connection establishment device, which is set on the terminal, such as Figure 4 As shown, the device comprises:

[0304] A first receiving unit 401 is configured to receive first information, where the first information at least includes execution conditions and configuration information of a candidate relay terminal and / or a candidate cell;

[0305] The selection unit 402 is configured to select a candidate relay terminal and / or a candidate cell when the execution condition is met, and apply configuration information of the selected candidate relay terminal and / or candidate cell.

[0306] In one embodiment, the device further includes: a first sending unit; wherein,

[0307] The first receiving unit 401 is further configured to receive second information sent by the first access network device, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells;

[0308] The first sending unit is used to send a measurement report to the first access network device.

[0309] In one embodiment, the selection unit 402 is further configured to:

[0310] If the connection with the selected candidate relay terminal and / or candidate cell fails, perform one of the following:

[0311] Sending third information to the first access network device, where the third information includes information related to the connection failure;

[0312] deleting the saved first information;

[0313] Select a cell and / or a relay terminal; if the selected relay terminal and / or cell is one of the candidate relay terminals and / or candidate cells, apply the corresponding configuration information.

[0314] In actual application, the receiving unit 401 and the first sending unit can be implemented by a communication interface in the connection establishment device; the selecting unit 402 can be implemented by a processor in the connection establishment device in combination with the communication interface.

[0315] In order to implement the method on the first access network device side of the embodiment of the present application, the embodiment of the present application also provides a connection establishment device, which is arranged on the first access network device, such as Figure 5 As shown, the device comprises:

[0316] The second sending unit 501 is configured to send first information to a terminal, where the first information at least includes execution conditions and configuration information of a candidate relay terminal and / or a candidate cell.

[0317] In one embodiment, the device may further include a second receiving unit 502 and a third sending unit 503; wherein,

[0318] The second receiving unit 502 is configured to send second information to the terminal, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells;

[0319] The third receiving unit 503 is configured to receive a measurement report sent by the terminal.

[0320] In one embodiment, the second sending unit 501 is further configured to send fourth information to the second access network device, where the fourth information includes at least one of the following:

[0321] Layer 2 identification of the candidate relay terminal;

[0322] a cell identifier of the candidate cell;

[0323] PLMN identifier;

[0324] SL-RSRP or SD-RSRP measurement results of candidate relay terminals;

[0325] RSRP measurement results of candidate cells;

[0326] Candidate cell list;

[0327] A list of candidate relay terminals;

[0328] Indication of a primary or secondary connection.

[0329] In actual application, the second sending unit 501, the second receiving unit 502 and the third receiving unit 503 can be implemented by a communication interface in the connection establishment device.

[0330] In order to implement the method on the second access network device side of the embodiment of the present application, the embodiment of the present application further provides a connection establishment device, which is arranged on the second access network device, and the device includes:

[0331] A fourth receiving unit is configured to receive fourth information sent by the first access network device; the fourth information includes at least one of the following:

[0332] Layer 2 identification of the candidate relay terminal;

[0333] a cell identifier of the candidate cell;

[0334] PLMN identifier;

[0335] SL-RSRP or SD-RSRP measurement results of candidate relay terminals;

[0336] RSRP measurement results of candidate cells;

[0337] Candidate cell list;

[0338] A list of candidate relay terminals;

[0339] Indication of a primary or secondary connection.

[0340] In actual application, the fourth receiving unit may be implemented by a processor in the connection establishing device.

[0341] It should be noted that: the connection establishment device provided in the above embodiment only uses the division of the above program modules as an example when establishing a connection. In actual applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the connection establishment device and the connection establishment method embodiment provided in the above embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0342] Based on the hardware implementation of the above program modules, and in order to implement the method on the terminal side of the embodiment of the present application, the embodiment of the present application also provides a terminal, such as Figure 6 As shown, the terminal 600 includes:

[0343] The first communication interface 601 is capable of exchanging information with the first access network device;

[0344] A first processor 602 is connected to the first communication interface 601 to implement information interaction with the first access network device, and is used to execute the method provided by one or more technical solutions of the above terminal side when running a computer program;

[0345] A first memory 603 , on which the computer program is stored.

[0346] Specifically, the first communication interface 601 is used to receive first information, where the first information at least includes execution conditions and configuration information of a candidate relay terminal and / or a candidate cell;

[0347] The first processor 602 is configured to select a candidate relay terminal and / or a candidate cell, and apply configuration information of the selected candidate relay terminal and / or candidate cell when the execution condition is met.

[0348] In one embodiment, the first communication interface 601 is further used for:

[0349] receiving second information sent by the first access network device, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells;

[0350] Send a measurement report to the first access network device.

[0351] In one embodiment, the first processor 602 is further configured to:

[0352] If the connection with the selected candidate relay terminal and / or candidate cell fails, perform one of the following:

[0353] Sending third information to the first access network device, where the third information includes information related to the connection failure;

[0354] deleting the saved first information;

[0355] Select a cell and / or a relay terminal; if the selected relay terminal and / or cell is one of the candidate relay terminals and / or candidate cells, apply the corresponding configuration information.

[0356] It should be noted that the specific processing process of the first processor 602 and the first communication interface 601 can be understood by referring to the above method.

[0357] Of course, in actual application, the various components in the terminal 600 are coupled together through the bus system 604. It can be understood that the bus system 604 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 604 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 6 Various buses are labeled as bus system 604 .

[0358] The first memory 603 in the embodiment of the present application is used to store various types of data to support the operation of the terminal 600. Examples of such data include: any computer program used to operate on the terminal 600.

[0359] The method disclosed in the above embodiment of the present application can be applied to the first processor 602, or implemented by the first processor 602. The first processor 602 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the first processor 602. The above-mentioned first processor 602 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The first processor 602 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the first memory 603, and the first processor 602 reads the information in the first memory 603 and completes the steps of the above method in combination with its hardware.

[0360] In an exemplary embodiment, the terminal 600 may be implemented by one or more application specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD), field programmable gate array (FPGA), general processor, controller, microcontroller (MCU), microprocessor, or other electronic components to execute the aforementioned method.

[0361] Based on the hardware implementation of the above program module, and in order to implement the method of the first access network device side of the embodiment of the present application, the embodiment of the present application also provides a first access network device, such as Figure 7 As shown, the first access network device 700 includes:

[0362] The second communication interface 701 is capable of exchanging information with the terminal and the second access network device;

[0363] The second processor 702 is connected to the second communication interface 701 to implement information interaction with the terminal and the second access network device, and is used to execute the method provided by one or more technical solutions on the first access network device side when running the computer program;

[0364] A second memory 703 , on which the computer program is stored.

[0365] Specifically, the second communication interface 701 is used to send first information to the terminal, where the first information at least includes execution conditions and configuration information of the candidate relay terminal and / or the candidate cell.

[0366] In one embodiment, the second communication interface 701 is further used for:

[0367] Sending second information to the terminal, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells;

[0368] receiving a measurement report sent by the terminal.

[0369] In one embodiment, the second communication interface 701 is further used for:

[0370] Sending fourth information to the second access network device, where the fourth information includes at least one of the following:

[0371] Layer 2 identification of the candidate relay terminal;

[0372] a cell identifier of the candidate cell;

[0373] PLMN identifier;

[0374] SL-RSRP or SD-RSRP measurement results of candidate relay terminals;

[0375] RSRP measurement results of candidate cells;

[0376] Candidate cell list;

[0377] A list of candidate relay terminals;

[0378] Indication of a primary or secondary connection.

[0379] It should be noted that the specific processing process of the second communication interface 701 can be understood by referring to the above method.

[0380] Of course, in actual application, the various components in the first access network device 700 are coupled together through the bus system 704. It can be understood that the bus system 704 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 704 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 7 Various buses are labeled as bus system 704 .

[0381] The second memory 703 in the embodiment of the present application is used to store various types of data to support the operation of the first access network device 700. Examples of such data include: any computer program used to operate on the first access network device 700.

[0382] The method disclosed in the above embodiment of the present application can be applied to the second processor 702, or implemented by the second processor 702. The second processor 702 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of the hardware in the second processor 702 or an instruction in the form of software. The above-mentioned second processor 702 may be a general-purpose processor, a DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The second processor 702 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiment of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the second memory 703. The second processor 702 reads the information in the second memory 703 and completes the steps of the above method in combination with its hardware.

[0383] In an exemplary embodiment, the first access network device 700 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general processors, controllers, MCUs, Microprocessors, or other electronic components to perform the aforementioned method.

[0384] Based on the hardware implementation of the above program module, and in order to implement the method of the second access network device side of the embodiment of the present application, the embodiment of the present application also provides a second access network device, such as Figure 8 As shown, the second access network device 800 includes:

[0385] The third communication interface 801 is capable of exchanging information with the first access network device;

[0386] a third processor 802, connected to the third communication interface 801, to implement information interaction with the first access network device, and configured to execute the method provided by one or more technical solutions on the second access network device side when running a computer program;

[0387] A third memory 803 , on which the computer program is stored.

[0388] Specifically, the third communication interface 801 is used to receive fourth information sent by the first access network device; the fourth information includes at least one of the following:

[0389] Layer 2 identification of the candidate relay terminal;

[0390] a cell identifier of the candidate cell;

[0391] PLMN identifier;

[0392] SL-RSRP or SD-RSRP measurement results of candidate relay terminals;

[0393] RSRP measurement results of candidate cells;

[0394] Candidate cell list;

[0395] A list of candidate relay terminals;

[0396] Indication of a primary or secondary connection.

[0397] It should be noted that the specific processing process of the third communication interface 801 can be understood by referring to the above method.

[0398] Of course, in actual application, the various components in the second access network device 800 are coupled together through the bus system 804. It can be understood that the bus system 804 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 804 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 8 Various buses are labeled as bus system 804 .

[0399] The third memory 803 in the embodiment of the present application is used to store various types of data to support the operation of the second access network device 800. Examples of such data include: any computer program used to operate on the second access network device 800.

[0400] The method disclosed in the above embodiment of the present application can be applied to the third processor 802, or implemented by the third processor 802. The third processor 802 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware or software instructions in the third processor 802. The third processor 802 mentioned above can be a general-purpose processor, a DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The third processor 802 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the third memory 803. The third processor 802 reads the information in the third memory 803 and completes the steps of the above method in combination with its hardware.

[0401] In an exemplary embodiment, the second access network device 800 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general processors, controllers, MCUs, Microprocessors, or other electronic components to perform the aforementioned method.

[0402] It can be understood that the memory (first memory 603, second memory 703, third memory 803) of the embodiment of the present application can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a ferromagnetic random access memory, a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), and direct RAM bus random access memory (DRRAM, Direct Rambus Random Access Memory).The memories described in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0403] In order to implement the method provided in the embodiment of the present application, the embodiment of the present application also provides a connection establishment system, such as Fig. 9 As shown, the system includes: a terminal 901, a first access network device 902 and a second access network device 903.

[0404] Here, it should be noted that the specific processing procedures of the terminal 901, the first access network device 902 and the second access network device 903 have been described in detail above and will not be repeated here.

[0405] In an exemplary embodiment, the embodiment of the present application further provides a storage medium, namely a computer storage medium, specifically a computer-readable storage medium, for example, including a first memory 603 storing a computer program, the computer program can be executed by the first processor 602 of the terminal 600 to complete the steps of the aforementioned terminal side method, and for another example, including a second memory 703 storing a computer program, the computer program can be executed by the second processor 702 of the first access network device 700 to complete the steps of the aforementioned first access network device side method, and for another example, including a third memory 803 storing a computer program, the computer program can be executed by the third processor 802 of the second access network device 800 to complete the steps of the aforementioned second access network device side method. The computer-readable storage medium can be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM.

[0406] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0407] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0408] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A connection establishment method, characterized in that: Applied to terminals, including: receiving first information, wherein the first information at least includes execution conditions and configuration information of a candidate relay terminal and / or a candidate cell; When the execution condition is met, a candidate relay terminal and / or a candidate cell is selected, and configuration information of the selected candidate relay terminal and / or candidate cell is applied.

2. The method according to claim 1, characterized in that The method further comprises: receiving second information sent by the first access network device, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells; Send a measurement report to the first access network device.

3. The method according to claim 2, characterized in that The second information includes at least one of the following: Measurement trigger events; Measurement and reporting of events; Discovery events of candidate relay terminals and / or candidate cells; Screening events of candidate relay terminals and / or candidate cells; Report the number of candidate relay terminals and / or candidate cells.

4. The method according to claim 3, characterized in that The measurement triggering event includes at least one of the following: The quality of the serving cell is lower than or equal to a first threshold; The quality change of the serving cell is higher than or equal to a second threshold; The quality change rate of the serving cell is greater than or equal to a third threshold; The uplink throughput of the terminal is greater than or equal to a fifth threshold; The flow rate of the terminal is greater than or equal to a sixth threshold; The buffering level of the terminal is greater than or equal to a seventh threshold; The quality of serving the relay terminal is lower than or equal to an eighth threshold; The quality change of the service relay terminal is lower than or equal to a ninth threshold.

5. The method according to claim 3, characterized in that: The measurement reporting event includes at least one of the following: The quality of the serving cell is lower than or equal to a first threshold; The quality change of the serving cell is higher than or equal to a second threshold; The quality change rate of the serving cell is greater than or equal to a third threshold; The quality of the candidate relay terminal is higher than or equal to a fourth threshold; The uplink throughput of the terminal is greater than or equal to a fifth threshold; The flow rate of the terminal is greater than or equal to a sixth threshold; The buffering level of the terminal is greater than or equal to a seventh threshold; The quality of serving the relay terminal is lower than or equal to an eighth threshold; The quality change of the service relay terminal is lower than or equal to a ninth threshold; The quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to the tenth threshold; The quality of the candidate relay terminal is greater than or equal to a fourth threshold, and the quality of the serving relay terminal is less than or equal to an eighth threshold; The quality of the candidate cell is higher than or equal to an eleventh threshold.

6. The method according to claim 3, characterized in that The discovery event includes at least one of the following: The quality of the serving cell is lower than or equal to a first threshold; The quality change of the serving cell is higher than or equal to a second threshold; The quality change rate of the serving cell is greater than or equal to a third threshold; The uplink throughput of the terminal is greater than or equal to a fifth threshold; The flow rate of the terminal is greater than or equal to a sixth threshold; The buffering level of the terminal is greater than or equal to a seventh threshold; The quality of serving the relay terminal is lower than or equal to an eighth threshold; The quality change of the service relay terminal is lower than or equal to a ninth threshold.

7. The method according to claim 3, characterized in that The screening event includes at least one of the following: The quality of the candidate relay terminal is higher than or equal to a fourth threshold; The quality of the candidate cell is higher than or equal to an eleventh threshold; The quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to a tenth threshold; The quality of the candidate relay terminal is higher than or equal to a fourth threshold, and the quality of the serving relay terminal is lower than or equal to an eighth threshold.

8. The method according to claim 1, characterized in that The situation where the execution condition is met includes at least one of the following: The quality of the candidate relay terminal is higher than or equal to a twelfth threshold; The quality of the candidate cell is higher than or equal to the thirteenth threshold; The uplink throughput of the terminal is greater than or equal to a fourteenth threshold; The traffic of the terminal is greater than or equal to a fifteenth threshold; The buffering level of the terminal is greater than or equal to a sixteenth threshold; The quality change between the candidate relay terminal and the serving relay terminal is greater than or equal to the seventeenth threshold; The quality of the candidate relay terminal is higher than or equal to the twelfth threshold, and the quality of the serving relay terminal is higher than or equal to the eighteenth threshold; The quality of the candidate relay terminal is higher than or equal to a twelfth threshold, and the quality of the serving cell is higher than or equal to a nineteenth threshold; The quality of the candidate cell is higher than or equal to a thirteenth threshold, and the quality of the service relay terminal is higher than or equal to an eighteenth threshold.

9. The method according to claim 1, characterized in that: The first information further includes at least one of the following: Layer 2 identification of the candidate relay terminal; The network identifier of the candidate relay terminal; a cell identifier of the candidate cell; Indication of primary or secondary connection; The selection rules for primary or secondary connections.

10. The method according to any one of claims 1 to 9, characterized in that: The method further comprises: If the connection with the selected candidate relay terminal and / or candidate cell fails, perform one of the following: Sending third information to the first access network device, where the third information includes information related to the connection failure; deleting the saved first information; Select a cell and / or a relay terminal; if the selected relay terminal and / or cell is one of the candidate relay terminals and / or candidate cells, apply the corresponding configuration information.

11. A connection establishment method, characterized in that: Applicable to the first access network device, including: First information is sent to the terminal, where the first information at least includes execution conditions and configuration information of the candidate relay terminal and / or the candidate cell.

12. The method according to claim 11, characterized in that The method further comprises: Sending second information to the terminal, where the second information at least includes measurement events of candidate relay terminals and / or candidate cells; receiving a measurement report sent by the terminal.

13. The method according to claim 12, characterized in that The method further comprises: Sending fourth information to the second access network device, where the fourth information includes at least one of the following: Layer 2 identification of the candidate relay terminal; a cell identifier of the candidate cell; Public land mobile network PLMN identity; The side link reference signal received power SL-RSRP or side link discovery reference signal received power SD-RSRP measurement result of the candidate relay terminal; Reference signal received power RSRP measurement results of candidate cells; Candidate cell list; A list of candidate relay terminals; Indication of a primary or secondary connection.

14. A connection establishment method, characterized in that: Applicable to the second access network equipment, including: Receive fourth information sent by the first access network device, where the third information includes at least one of the following: Layer 2 identification of the candidate relay terminal; a cell identifier of the candidate cell; PLMN identifier; SL-RSRP or SD-RSRP measurement results of candidate relay terminals; RSRP measurement results of candidate cells; Candidate cell list; A list of candidate relay terminals; Indication of a primary or secondary connection.

15. A terminal, characterized in that: include: A first processor and a first communication interface; wherein, The first communication interface is used to receive first information, where the first information at least includes execution conditions and configuration information of a candidate relay terminal and / or a candidate cell; The first processor is configured to select a candidate relay terminal and / or a candidate cell and apply configuration information of the selected candidate relay terminal and / or candidate cell when the execution condition is met.

16. A first access network device, characterized in that: include: A second processor and a second communication interface; wherein, The second communication interface is used to send first information to the terminal, where the first information at least includes execution conditions and configuration information of the candidate relay terminal and / or the candidate cell.

17. A second access network device, characterized in that: include: A third processor and a third communication interface; wherein, The third communication interface is used to receive third information sent by the first access network device; The third information includes at least one of the following: Layer 2 identification of the candidate relay terminal; a cell identifier of the candidate cell; PLMN identifier; SL-RSRP or SD-RSRP measurement results of candidate relay terminals; RSRP measurement results of candidate cells; Candidate cell list; A list of candidate relay terminals; Indication of a primary or secondary connection.

18. A terminal, characterized in that: include: a first processor and a first memory for storing a computer program executable on the processor, Wherein, when the first processor is used to run the computer program, the steps of the method described in any one of claims 1 to 10 are executed.

19. A first access network device, characterized in that: include: a second processor and a second memory for storing a computer program executable on the processor, Wherein, when the second processor is used to run the computer program, the steps of the method described in any one of claims 11 to 13 are executed.

20. A second access network device, characterized in that: include: a second processor and a second memory for storing a computer program executable on the processor, Wherein, when the second processor is used to run the computer program, it executes the steps of the method of claim 14.

21. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 10, or implements the steps of the method according to any one of claims 11 to 13, or implements the steps of the method according to claim 14.

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