Path adding method and device, equipment and storage medium

Abstract

The invention discloses a path adding method and device, equipment and a storage medium. The method comprises the following steps: a first network device sends a first message to a second network device; wherein the first message is used for requesting to add a relay terminal in a radio resource control (RRC) connection state between the remote terminal and the second network device to form a non-direct connection path.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a path adding method, device, equipment and storage medium. Background Art

[0002] At present, the sidelink (SL) relay supports dual connections, and the terminal is connected to the air interface and the relay terminal at the same time, and the air interface and the relay terminal are the same base station. For the scenario where the air interface connected to the remote terminal and the relay terminal are not the same base station, that is, the inter-gNB scenario. The inter-gNB scenario includes the remote terminal accessing base station 1 (Source gNB) through a non-direct path (indirect path) and accessing base station 2 (Target gNB) through a direct path (direct path). However, the relevant technology does not involve a technical solution for how to add a non-direct path in the inter-gNB scenario where the air interface connected to the remote terminal and the relay terminal are not the same base station. Summary of the invention

[0003] In view of this, embodiments of the present application hope to provide a path adding method, apparatus, device and storage medium.

[0004] The technical solution of the embodiment of the present application is implemented as follows:

[0005] The present application embodiment provides a path adding method, which is applied to a first network device, and the method includes:

[0006] Sending a first message to a second network device;

[0007] The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

[0008] In addition, according to at least one embodiment of the present application, the method further includes:

[0009] receiving a second message sent by the second network device;

[0010] The second message is a confirmation message for the first message, and the confirmation message carries the RRC status information of the relay terminal.

[0011] In addition, according to at least one embodiment of the present application, sending the first message to the second network device includes:

[0012] The first message is sent to a plurality of second network devices.

[0013] In addition, according to at least one embodiment of the present application, the method further includes:

[0014] After sending the first gap to the plurality of second network devices, start timing;

[0015] If the timing does not exceed the preset threshold, if a second message sent by any one of the multiple second network devices is received, and the second message indicates that the relay terminal is in an RRC connected state, stop the timing, and send a third message to other second network devices among the multiple second network devices except the any one second network device;

[0016] The second message is a confirmation message for the first request, and the confirmation message carries the RRC status information of the relay terminal.

[0017] In addition, according to at least one embodiment of the present application, the method further includes:

[0018] In the case where the timing exceeds the preset threshold, if the second message sent by any second network device among the plurality of second network devices is not received, a target network terminal for establishing a non-directly connected path is selected from the plurality of second network devices.

[0019] In addition, according to at least one embodiment of the present application, the method further includes:

[0020] Receiving first information sent by the remote terminal;

[0021] The first information represents the location information of the relay terminal, and the location information is obtained by the remote terminal initiating a sidelink (SL) positioning measurement to the relay terminal.

[0022] In addition, according to at least one embodiment of the present application, the method further includes:

[0023] The distance between the relay terminal and the first network device is determined by using the location information of the relay terminal.

[0024] In addition, according to at least one embodiment of the present application, the method further includes:

[0025] sending a fourth message to the remote terminal;

[0026] The fourth message is used to instruct the remote terminal to notify the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier.

[0027] At least one embodiment of the present application provides a path adding method, which is applied to a second network device, and the method includes:

[0028] Receiving a first message sent by a first network device;

[0029] The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

[0030] In addition, according to at least one embodiment of the present application, the method further includes:

[0031] A candidate relay terminal in an RRC connected state is preferentially selected from a plurality of candidate relay terminals as the relay terminal.

[0032] In addition, according to at least one embodiment of the present application, the method further includes:

[0033] Sending a second message to the first network device; the second message is a confirmation message for the first message;

[0034] The confirmation message carries the RRC status information corresponding to the relay terminal.

[0035] At least one embodiment of the present application provides a path adding method, which is applied to a remote terminal, and the method further includes:

[0036] Sending first information to a first network device;

[0037] Among them, the first information represents the location information of the relay terminal, and the location information is obtained by the remote terminal initiating SL positioning measurement to the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when the first network device sends a first message to the second network device to request the formation of a non-direct path between the remote terminal and the second network device.

[0038] In addition, according to at least one embodiment of the present application, the method further includes:

[0039] Sending a fifth message to the relay terminal; the fifth message is used to request measurement of the position of the relay terminal;

[0040] receiving measurement data sent by the relay terminal;

[0041] The position of the relay terminal is measured using the measurement data to obtain the position information of the relay terminal.

[0042] In addition, according to at least one embodiment of the present application, the method further includes:

[0043] receiving a fourth message sent by the first network device; the fourth message is used to instruct the remote terminal to notify the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier;

[0044] The fourth message is sent to the relay terminal.

[0045] At least one embodiment of the present application provides a path adding method, which is applied to a relay terminal, and the method includes:

[0046] sending a sixth message to the remote terminal;

[0047] Among them, the sixth message is used to indicate the RRC status information of the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when the first network device sends a first message to the second network device to request to form a non-direct path between the remote terminal and the second network device.

[0048] In addition, according to at least one embodiment of the present application, in a first mode, the relay terminal corresponds to a listening terminal, and the remote terminal corresponds to a broadcasting terminal;

[0049] In the second mode, the relay terminal corresponds to a discovered terminal, and the remote terminal corresponds to a discovered terminal.

[0050] In addition, according to at least one embodiment of the present application, the method further includes:

[0051] receiving a fourth message sent by the remote terminal; wherein the fourth message is used to instruct the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier;

[0052] Based on the reference signal received power RSRP signal strength of the downlink DL, cell reselection is performed; or indication information of rejecting cell reselection is sent to the remote terminal.

[0053] At least one embodiment of the present application provides a path adding device, including:

[0054] A first sending module, used to send a first message to a second network device;

[0055] The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

[0056] At least one embodiment of the present application provides a path adding device, including:

[0057] A receiving module, configured to receive a first message sent by a first network device;

[0058] The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

[0059] At least one embodiment of the present application provides a path adding device, including:

[0060] A second sending module, used for sending first information to the first network device;

[0061] Among them, the first information represents the location information of the relay terminal, and the location information is obtained by the remote terminal initiating SL positioning measurement to the relay terminal; the relay terminal is a relay terminal in RRC state added by the first network device sending a first message to the second network device to request the formation of a non-direct path between the remote terminal and the second network device.

[0062] At least one embodiment of the present application provides a path adding device, including:

[0063] A third sending module, used for sending a sixth message to the remote terminal;

[0064] Among them, the sixth message is used to indicate the RRC status information of the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when the first network device sends a first message to the second network device to request to form a non-direct path between the remote terminal and the second network device.

[0065] At least one embodiment of the present application provides a first network device, including a processor and a memory for storing a computer program that can be run on the processor.

[0066] Wherein, when the processor is used to run the computer program, it executes the steps of any one of the methods described above on the first network device side.

[0067] At least one embodiment of the present application provides a second network device, including a processor and a memory for storing a computer program that can be run on the processor.

[0068] Wherein, when the processor is used to run the computer program, it executes the steps of any one of the methods described above on the second network device side.

[0069] At least one embodiment of the present application provides a remote terminal, comprising a processor and a memory for storing a computer program that can be run on the processor.

[0070] Wherein, when the processor is used to run the computer program, it executes the steps of any one of the methods described above on the remote terminal side.

[0071] At least one embodiment of the present application provides a relay terminal, including a processor and a memory for storing a computer program that can be run on the processor.

[0072] Wherein, when the processor is used to run the computer program, it executes the steps of any one of the methods described above on the relay terminal side.

[0073] At least one embodiment of the present application provides a storage medium having a computer program stored thereon, wherein the computer program implements the steps of any of the above methods when executed by a processor.

[0074] The path adding method, apparatus, device and storage medium provided in the embodiments of the present application include: a first network device sends a first request to a second network device; wherein the first request is used to request to add a relay terminal in an RRC state between a remote terminal and the second network device to form a non-direct path.

[0075] The technical solution provided in the embodiment of the present application is adopted to provide a technical solution for adding a non-direct path in a scenario where the air interface connected to the remote terminal and the relay terminal are not the same base station, i.e., inter-gNB. Specifically, the first network device sends a first message to the second network device; wherein the first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1a It is a schematic diagram of a related art in which an air interface connected to a remote terminal and a relay terminal are not the same base station;

[0077] Figure 1b is a schematic diagram of the interaction between a remote terminal, a relay terminal, a first base station and a second base station in the related art;

[0078] Figure 2 This is a schematic diagram of the implementation process of the path adding method of the embodiment of the present application;

[0079] Figure 3 This is a schematic diagram of the implementation process of the path adding method of the embodiment of the present application Figure 2 ;

[0080] Figure 4 This is a schematic diagram of the implementation process of the path adding method of the embodiment of the present application Figure 3 ;

[0081] Figure 5 This is a schematic diagram of the implementation process of the path adding method of the embodiment of the present application Figure 4 ;

[0082] Figure 6 This is a schematic diagram of the structure of the path adding device according to an embodiment of the present application;

[0083] Figure 7 This is a schematic diagram of the structure of the path adding device in the embodiment of the present application. Figure 2 ;

[0084] Figure 8 This is a schematic diagram of the structure of the path adding device in the embodiment of the present application. Figure 3 ;

[0085] Fig. 9 This is a schematic diagram of the structure of the path adding device in the embodiment of the present application. Figure 4 ;

[0086] Fig.10 This is a schematic diagram of the composition structure of the first network device in the embodiment of the present application.

[0087] Fig.11 It is a schematic diagram of the composition structure of the second network device in an embodiment of the present application;

[0088] Fig.12 It is a schematic diagram of the composition structure of the remote terminal in the embodiment of the present application;

[0089] Fig.13 It is a schematic diagram of the composition structure of the relay terminal in the embodiment of the present application. DETAILED DESCRIPTION

[0090] Before introducing the technical solutions of the embodiments of the present application, the related technologies are first introduced.

[0091] Currently, the sidelink (SL) relay supports dual connections, where the terminal is connected to the air interface and the relay terminal at the same time, and the air interface and the relay terminal are the same base station. This is for scenarios where the air interface and the relay terminal connected to the remote terminal are not the same base station, that is, the inter-gNB scenario.

[0092] Figure 1a Schematic diagram of the air interface connected to the remote terminal and the relay terminal in the related art, where the air interface connected to the remote terminal is not the same base station, such as Figure 1aAs shown, for the scenario where the air interface connected to the remote terminal and the relay terminal are not the same base station, that is, the inter-gNB scenario, the remote terminal accesses base station 1 (Source gNB) through an indirect path, and accesses base station 2 (Target gNB) through a direct path; or, the remote terminal accesses base station 1 (Source gNB) through a indirect path, and accesses base station 2 (Target gNB) through an indirect path.

[0093] Figure 1b It is a schematic diagram of the interaction between a remote terminal, a relay terminal, a first base station and a second base station in the related art.

[0094] However, the related art does not involve a technical solution for adding another path, i.e., a non-direct connection path, in an inter-gNB scenario where the air interface to which the remote terminal is connected and the relay terminal are not the same base station.

[0095] The embodiments of the present application are mainly aimed at the case of adding a non-direct path (indirect path) in an inter-gNB scenario, and the processing of the candidate relay terminal (condidate UE) in the idle state (idle) and the inactive state (inactive). For the candidate relay terminal (candidate UE) in the idle state, after the target base station (target gNB) receives the path addition request, the target base station needs to establish an RRC connection for the UE, and perform subsequent RRC reconfiguration to complete the addition of the non-direct path (indirect path) for the remote terminal (remote UE). For the candidate UE in the inactive state, after the target gNB receives the path addition request, the target base station needs to perform RRC connection recovery for the UE, and subsequent RRC reconfiguration to complete the addition of the indirect path for the remote UE. However, a large delay will be introduced. At the same time, for the path addition between such base stations, it is necessary to introduce the processes such as path addition request, request confirmation, reconfiguration completion, sequence number status transfer (SN status transfer), and data forwarding on the Xn interface.

[0096] Based on this, in an embodiment of the present application, the first network device sends a first request to the second network device; wherein the first request is used to request to add a relay terminal in the RRC state between the remote terminal and the second network device to form a non-direct path.

[0097] See also Figure 2 , Figure 2 Schematic diagram of the implementation process of the path adding method of the embodiment of the present application, applied to the first network device, such as Figure 2 As shown, the method comprises step 201:

[0098] Step 201: Send a first message to a second network device; wherein the first message is used to request to add a relay terminal in an RRC connected state between a remote terminal and the second network device to form a non-direct path.

[0099] As an example, in a scenario where the air interface to which the remote terminal is connected and the relay terminal are not the same base station (i.e., inter-gNB), the air interface to which the remote terminal is connected corresponds to the first network device, and the remote terminal is connected to the second network device through the relay terminal. In order to avoid introducing a large delay in the process of adding the relay terminal to form a non-direct path between the remote terminal and the second network device, the first network device may request the second network device to add a relay terminal in an RRC connected state for the remote terminal to form the non-direct path.

[0100] In some embodiments, the method further comprises:

[0101] receiving a second message sent by the second network device;

[0102] The second message is a confirmation message for the first message, and the confirmation message carries the RRC status information of the relay terminal.

[0103] As an example, the first network device adds a relay terminal in an RRC connected state to form a non-direct path between the remote terminal and the second network device.

[0104] As an example, the first message may also be described as a path adding request message, and the second message may also be described as a path adding request confirmation message.

[0105] For example, the first network device is a source base station, and the second network device is a target base station. After receiving the path addition request message sent by the source base station, the target base station selects or preferentially selects a candidate relay terminal (relay UE) in an RRC connected state as the final relay terminal. The target base station sends a path addition request confirmation message to the source base station, wherein the path addition request confirmation message includes the RRC state information of the final relay terminal (relay UE) selected by the target base station.

[0106] In some embodiments, sending the first message to the second network device includes:

[0107] The first message is sent to a plurality of second network devices.

[0108] In some embodiments, the method further comprises:

[0109] After sending the first message to the plurality of second network devices, starting timing;

[0110] If the timing does not exceed the preset threshold, if a second message sent by any one of the multiple second network devices is received, and the second message indicates that the relay terminal is in an RRC connected state, stop the timing, and send a third message to other second network devices among the multiple second network devices except the any one second network device;

[0111] The second message is a confirmation message for the first message, and the confirmation message carries the RRC status information of the relay terminal.

[0112] In some embodiments, the method further comprises:

[0113] In the case where the timing exceeds the preset threshold, if the second message sent by any second network device among the plurality of second network devices is not received, a target network terminal for establishing a non-directly connected path is selected from the plurality of second network devices.

[0114] For example, the first network device is a source base station, the second network device is a target base station, the source base station sets a timer, and when the source base station sends a path addition request to multiple target base stations, the timer starts; when the source base station receives a path addition request confirmation message sent by any target base station, the confirmation message includes a relay terminal (relay UE) in an RRC connection state, the timer is stopped. And a third message (HANDOVER CANCEL message) is sent to other target base stations. When the timer expires, the source base station does not receive a path addition request confirmation message sent by the target base station, the confirmation message includes a candidate relay UE in an RRC connection state, and the source base station selects any target base station that sends a path addition request confirmation message.

[0115] In some embodiments, the method further comprises:

[0116] Receiving first information sent by the remote terminal;

[0117] The first information represents the location information of the relay terminal, and the location information is obtained by the remote terminal initiating SL positioning measurement to the relay terminal.

[0118] In some embodiments, the method further comprises:

[0119] The distance between the relay terminal and the first network device is determined by using the location information of the relay terminal.

[0120] For example, the first network device is a source base station, and the first network device receives the location information of the relay terminal (relay UE). If the received location information of the relay terminal (relay UE) is an absolute position such as coordinates, then the distance between the relay terminal (relay UE) and the first network device is calculated in combination with the position of the first network device itself. If the received location information of the relay terminal (relay UE) is a relative position, the distance between the relay terminal (relay UE) and the first network device can be directly obtained.

[0121] In some embodiments, the method further comprises:

[0122] sending a fourth message to the remote terminal;

[0123] The fourth message is used to instruct the remote terminal to notify the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier.

[0124] For example, the first network device is a source base station, and the source base station sends a fourth message such as an RRC message to the remote terminal (remote UE), instructing the remote terminal to notify the relay terminal (relay UE) to perform cell reselection. The RRC message includes relevant information of the source base station, PLMN ID, NR cell identifier (cell ID), etc.

[0125] In the embodiment of the present application, the following advantages are possessed:

[0126] (1) A technical solution for adding a non-direct path in a scenario where the air interface to which the remote terminal is connected and the relay terminal are not the same base station, i.e., inter-gNB, is provided. Specifically, a first network device sends a first message to a second network device; wherein the first message is used to request to add a relay terminal in an RRC connected state between the remote terminal and the second network device to form a non-direct path.

[0127] In addition, the first network device sends the first message to the second network device, which can enhance the Xn signaling between the first network device (source base station) and the second network device (target base station).

[0128] (2) Based on the RRC state of the candidate relay terminal (relay UE), a relay terminal in an RRC connected state is selected to be added between the remote terminal and the second network device, thereby avoiding the delay introduced by the candidate terminal performing the RRC state recovery and RRC connection establishment process, and improving the efficiency and success rate of the terminal in the process of establishing a dual connection.

[0129] See also Figure 3 , Figure 3 Schematic diagram of the implementation process of the path adding method of the embodiment of the present application, which is applied to the second network device, such as Figure 3 As shown, the method comprises step 301:

[0130] Step 301: Receive a first message sent by a first network device; wherein the first message is used to request to add a relay terminal in an RRC connection state between a remote terminal and the second network device to form a non-direct path.

[0131] In some embodiments, the method further comprises:

[0132] A candidate relay terminal in an RRC connected state is preferentially selected from a plurality of candidate relay terminals as the relay terminal.

[0133] In some embodiments, the method further comprises:

[0134] Sending a second message to the first network device; the second message is a confirmation message for the first message;

[0135] The confirmation message carries the RRC status information corresponding to the relay terminal.

[0136] In the embodiment of the present application, the following advantages are possessed:

[0137] (1) A technical solution for adding a non-direct path in a scenario where the air interface to which the remote terminal is connected and the relay terminal are not the same base station, i.e., inter-gNB, is provided. Specifically, a first network device sends a first message to a second network device; wherein the first message is used to request to add a relay terminal in an RRC connected state between the remote terminal and the second network device to form a non-direct path.

[0138] In addition, the first network device sends the first message to the second network device, which can enhance the Xn signaling between the first network device (source base station) and the second network device (target base station).

[0139] (2) Based on the RRC state of the candidate relay terminal (relay UE), a relay terminal in an RRC connected state is selected to be added between the remote terminal and the second network device, thereby avoiding the delay introduced by the candidate terminal performing the RRC state recovery and RRC connection establishment process, and improving the efficiency and success rate of the terminal in the process of establishing a dual connection.

[0140] See also Figure 4 , Figure 4 Schematic diagram of the implementation flow of the path adding method of the present application embodiment, which is applied to a remote terminal, such as Figure 4 As shown, the method comprises step 401:

[0141] Step 401: Send first information to a first network device; wherein the first information represents location information of a relay terminal, and the location information is obtained by the remote terminal initiating SL positioning measurement to the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when the first network device sends a first message to a second network device to request formation of a non-direct path between the remote terminal and the second network device.

[0142] As an example, the remote terminal (Remote UE) reports the location information corresponding to the relay terminal (Relay UE) to the first network device. The reported location information may be included in the first information such as a measurement report message.

[0143] In some embodiments, the method further comprises:

[0144] Sending a fifth message to the relay terminal; the fifth message is used to request measurement of the position of the relay terminal;

[0145] receiving measurement data sent by the relay terminal;

[0146] The position of the relay terminal is measured using the measurement data to obtain the position information of the relay terminal.

[0147] As an example, for a remote terminal supporting SL positioning, the remote terminal (anchor) initiates SL positioning to the relay terminal and measures the location information of the relay terminal (target). The measurement method is not limited.

[0148] As an example, it is necessary to introduce a trigger event for SL positioning, that is, when the remote terminal is authorized as L2 UE toNetwork remote UE or L2 UE to UEremote UE, the remote terminal can interact with the relay terminal (also referred to as the target terminal or the terminal to be located) through the PC5 interface to request specific location services and provide auxiliary data.

[0149] In some embodiments, the method further comprises:

[0150] receiving a fourth message sent by the first network device; the fourth message is used to instruct the remote terminal to notify the relay terminal to reselect a cell; the third message carries relevant information of the first network device, a PLMN identifier, and a cell identifier;

[0151] A fourth message is sent to the relay terminal; the fourth message is used to instruct the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier.

[0152] As an example, the remote terminal (remote UE) sends a fourth message to the relay terminal (relay UE) to notify the relay terminal (relay UE) to perform cell reselection. The fourth message may include source base station information, PLMN ID, NR cell ID, etc.

[0153] As an example, after receiving the fourth message, the relay terminal (relay UE) performs cell reselection or rejects cell reselection based on the RSRP signal strength of the downlink (DL), and sends an indication message of rejecting cell reselection to the remote terminal (remote UE).

[0154] In the embodiment of the present application, the following advantages are possessed:

[0155] (1) The remote terminal supports SL positioning and sends the location information of the relay terminal obtained by SL positioning to the first network device.

[0156] (2) In order to obtain the location information of the relay terminal in the RRC connection state, the relay terminal sends the first information to the first network device. In this way, the first network device can determine the distance between the relay terminal and the remote terminal, and the distance between the relay terminal and the first network device based on the location information of the relay terminal, thereby evaluating the SL signal and air interface signal strength of the relay terminal, and judging whether to select the relay terminal to form a non-direct connection path based on the evaluation result, that is, it can provide a basis for relay selection.

[0157] See also Figure 5 , Figure 5 Schematic diagram of the implementation flow of the path adding method of the embodiment of the present application, which is applied to the relay terminal, such as Figure 5 As shown, the method includes step 501:

[0158] Step 501: Send a sixth message to a remote terminal; wherein the sixth message is used to indicate the RRC status information of the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when a first network device sends a first message to a second network device to request to form a non-direct path between the remote terminal and the second network device.

[0159] In some embodiments, in a first mode, the relay terminal corresponds to a listening terminal, and the remote terminal corresponds to a broadcasting terminal; in a second mode, the relay terminal corresponds to a discovered terminal, and the remote terminal corresponds to a discovered terminal.

[0160] As an example, for the first mode (model A), the monitoring terminal (monitoring UE) sends the indication information of the RRC state to the announcing terminal (announcing UE), in the SL relay, the monitoring terminal (monitoring UE) refers to the relay terminal (Relay UE), and the announcing terminal (announcing UE) refers to the remote terminal (remote UE). For the second mode (Model B), the discovered terminal (Discoveree UE) sends the indication information of the RRC state to the discoverer terminal (Discoverer UE), in the SL relay, the discovered terminal (Discoveree UE) refers to the relay terminal (RelayUE) and the discoverer terminal (Discoverer UE) refers to the remote terminal (remote UE).

[0161] In some embodiments, the method further comprises:

[0162] receiving a fourth message sent by the remote terminal; wherein the fourth message is used to instruct the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier;

[0163] Based on the RSRP signal strength of the downlink DL, cell reselection is performed; or indication information of rejecting cell reselection is sent to the remote terminal.

[0164] As an example, the relay terminal (relay UE) receives the fourth message, performs cell reselection based on the RSRP signal strength of the downlink (DL), or rejects cell reselection, and sends indication information of rejecting cell reselection to the remote terminal (remote UE).

[0165] In the embodiment of the present application, the following advantages are possessed:

[0166] (1) In the discovery process, the relay terminal is supported to send its own RRC state information to the remote terminal. The relay terminal sends its own RRC state information to the remote terminal, which can achieve signaling enhancement in the discovery process.

[0167] (2) The remote terminal obtains the RRC state of the relay terminal, which can help the network device to select the relay. Selecting a terminal in the RRC connected state can reduce the delay in the indirect path establishment process and the potential link establishment failure.

[0168] In order to implement the path adding method of the embodiment of the present application, the embodiment of the present application also provides a path adding device. Figure 6 Schematic diagram of the structure of the path adding device in the embodiment of the present application. Figure 6 As shown, the device comprises:

[0169] A first sending module 61, configured to send a first message to a second network device;

[0170] The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

[0171] In some embodiments, the device is further used to:

[0172] receiving a second message sent by the second network device;

[0173] The second message is a confirmation message for the first message, and the confirmation message carries the RRC status information of the relay terminal.

[0174] In some embodiments, sending the first message to the second network device includes:

[0175] The first message is sent to a plurality of second network devices.

[0176] In some embodiments, the device is further used to:

[0177] After sending the first message to the plurality of second network devices, starting timing;

[0178] If the timing does not exceed the preset threshold, if a second message sent by any one of the multiple second network devices is received, and the second message indicates that the relay terminal is in an RRC connected state, stop the timing, and send a third message to other second network devices among the multiple second network devices except the any one second network device;

[0179] The second message is a confirmation message for the first message, and the confirmation message carries the RRC status information of the relay terminal.

[0180] In some embodiments, the device is further used to:

[0181] In the case where the timing exceeds the preset threshold, if the second message sent by any second network device among the plurality of second network devices is not received, a target network terminal for establishing a non-directly connected path is selected from the plurality of second network devices.

[0182] In some embodiments, the device is further used to:

[0183] Receiving first information sent by the remote terminal;

[0184] The first information represents the location information of the relay terminal, and the location information is obtained by the remote terminal initiating SL positioning measurement to the relay terminal.

[0185] In some embodiments, the device is further used to:

[0186] The distance between the relay terminal and the first network device is determined by using the location information of the relay terminal.

[0187] In some embodiments, the first sending module 61 is further used for:

[0188] sending a fourth message to the remote terminal;

[0189] The fourth message is used to instruct the remote terminal to notify the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier.

[0190] In actual application, the first sending module 61 can be implemented by a communication interface in the configuration device.

[0191] It should be noted that: when the configuration device provided in the above embodiment is configured, only the division of the above program modules is used as an example. 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 above-described processing. In addition, the configuration device provided in the above embodiment and the configuration method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0192] In order to implement the path adding method of the embodiment of the present application, the embodiment of the present application also provides a path adding device. Figure 7 Schematic diagram of the structure of the path adding device in the embodiment of the present application. Figure 7 As shown, the device comprises:

[0193] The receiving module 71 is used to receive a first message sent by a first network device;

[0194] The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

[0195] In some embodiments, the device is further used to:

[0196] A candidate relay terminal in an RRC connected state is preferentially selected from a plurality of candidate relay terminals as the relay terminal.

[0197] In some embodiments, the device is further used to:

[0198] Sending a second message to the first network device; the second message is a confirmation message for the first message;

[0199] The confirmation message carries the RRC status information corresponding to the relay terminal.

[0200] In actual application, the first sending module 61 can be implemented by a communication interface in the configuration device.

[0201] It should be noted that: when the configuration device provided in the above embodiment is configured, only the division of the above program modules is used as an example. 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 above-described processing. In addition, the configuration device provided in the above embodiment and the configuration method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0202] In order to implement the path adding method of the embodiment of the present application, the embodiment of the present application also provides a path adding device. Figure 8Schematic diagram of the structure of the path adding device in the embodiment of the present application. Figure 8 As shown, the device comprises:

[0203] A second sending module 81, configured to send first information to a first network device;

[0204] Among them, the first information represents the location information of the relay terminal, and the location information is obtained by the remote terminal initiating SL positioning measurement to the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when the first network device sends a first message to the second network device to request the formation of a non-direct path between the remote terminal and the second network device.

[0205] In some embodiments, the second sending module 81 is further used for:

[0206] Sending a fifth message to the relay terminal; the fifth message is used to request measurement of the position of the relay terminal;

[0207] receiving measurement data sent by the relay terminal;

[0208] The position of the relay terminal is measured using the measurement data to obtain the position information of the relay terminal.

[0209] In some embodiments, the device is further used to:

[0210] receiving a fourth message sent by the first network device; the fourth message is used to instruct the remote terminal to notify the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier;

[0211] The fourth message is sent to the relay terminal.

[0212] In actual application, the second sending module 81 can be implemented by a communication interface in the configuration device.

[0213] It should be noted that: when the configuration device provided in the above embodiment is configured, only the division of the above program modules is used as an example. 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 above-described processing. In addition, the configuration device provided in the above embodiment and the configuration method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0214] In order to implement the path adding method of the embodiment of the present application, the embodiment of the present application also provides a path adding device. Fig. 9Schematic diagram of the structure of the path adding device in the embodiment of the present application. Fig. 9 As shown, the device comprises:

[0215] A third sending module 91, configured to send a sixth message to a remote terminal;

[0216] Among them, the sixth message is used to indicate the RRC status information of the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when the first network device sends a first message to the second network device to request to form a non-direct path between the remote terminal and the second network device.

[0217] In some embodiments, in the first mode, the relay terminal corresponds to a listening terminal and the remote terminal corresponds to a broadcasting terminal;

[0218] In the second mode, the relay terminal corresponds to a discovered terminal, and the remote terminal corresponds to a discovered terminal.

[0219] In some embodiments, the device is further used to:

[0220] receiving a fourth message sent by the remote terminal; wherein the fourth message is used to instruct the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier;

[0221] Based on the reference signal received power RSRP signal strength of the downlink DL, cell reselection is performed; or indication information of rejecting cell reselection is sent to the remote terminal.

[0222] In actual application, the third sending module 91 can be implemented by a communication interface in the configuration device.

[0223] It should be noted that: when the configuration device provided in the above embodiment is configured, only the division of the above program modules is used as an example. 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 above-described processing. In addition, the configuration device provided in the above embodiment and the configuration method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0224] The embodiment of the present application also provides a first network device, such as Fig.10 As shown, including:

[0225] The first communication interface 101 is capable of exchanging information with other first network devices;

[0226] The first processor 102 is connected to the first communication interface 101 and is used to execute the method provided by one or more technical solutions of the first network device side when running a computer program. The computer program is stored in the first memory 103.

[0227] It should be noted that: the specific processing process of the first processor 102 and the first communication interface 101 is detailed in the method embodiment and will not be repeated here.

[0228] Of course, in actual application, the various components in the first network device 100 are coupled together through the bus system 104. It can be understood that the bus system 104 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 104 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Fig.10 Various buses are labeled as bus system 104 .

[0229] The first memory 103 in the embodiment of the present application is used to store various types of data to support the operation of the first network device 100. Examples of such data include: any computer program used to operate on the first network device 100.

[0230] The method disclosed in the above embodiment of the present application can be applied to the first processor 102, or implemented by the first processor 102. The first processor 102 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 first processor 102. The above-mentioned first processor 102 may be a general-purpose processor, a digital data processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The first processor 102 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 103, and the first processor 102 reads the information in the first memory 103 and completes the steps of the above method in combination with its hardware.

[0231] The present application embodiment also provides a second network device, such as Fig.11 As shown, including:

[0232] The second communication interface 111 is capable of exchanging information with other first network devices;

[0233] The second processor 112 is connected to the second communication interface 111 and is used to execute the method provided by one or more technical solutions of the second network device side when running a computer program. The computer program is stored in the second memory 113.

[0234] It should be noted that: the specific processing process of the second processor 112 and the second communication interface 111 is detailed in the method embodiment, which will not be repeated here.

[0235] Of course, in actual application, the various components in the second network device 110 are coupled together through the bus system 114. It can be understood that the bus system 114 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 114 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Fig.11 Various buses are labeled as bus system 114 .

[0236] The second memory 113 in the embodiment of the present application is used to store various types of data to support the operation of the second network device 110. Examples of such data include: any computer program used to operate on the second network device 110.

[0237] The method disclosed in the above embodiment of the present application can be applied to the second processor 112, or implemented by the second processor 112. The second processor 112 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 second processor 112. The above-mentioned second processor 112 may be a general-purpose processor, a digital data processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The second processor 112 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The 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 113, and the second processor 112 reads the information in the second memory 113 and completes the steps of the above method in combination with its hardware.

[0238] The present application also provides a remote terminal, such as Fig.12 As shown, including:

[0239] The third communication interface 121 is capable of exchanging information with other remote terminals;

[0240] The third processor 122 is connected to the third communication interface 121 and is used to execute the method provided by one or more technical solutions of the remote terminal side when running the computer program. The computer program is stored in the third memory 123.

[0241] It should be noted that: the specific processing process of the third processor 122 and the third communication interface 121 is detailed in the method embodiment, which will not be repeated here.

[0242] Of course, in actual application, the various components in the remote terminal 120 are coupled together through the bus system 124. It is understood that the bus system 124 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 124 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Fig.12 Various buses are labeled as bus system 124 .

[0243] The third memory 123 in the embodiment of the present application is used to store various types of data to support the operation of the remote terminal 120. Examples of such data include: any computer program used to operate on the remote terminal 120.

[0244] The method disclosed in the above embodiment of the present application can be applied to the third processor 122, or implemented by the third processor 122. The third processor 122 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 third processor 122. The above-mentioned third processor 122 may be a general-purpose processor, a digital data processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The third processor 122 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 may be located in a storage medium, which is located in the third memory 123, and the third processor 122 reads the information in the third memory 123 and completes the steps of the above method in combination with its hardware.

[0245] The embodiment of the present application also provides a relay terminal, such as Fig.13 As shown, including:

[0246] The fourth communication interface 131 is capable of exchanging information with other remote terminals;

[0247] The fourth processor 132 is connected to the fourth communication interface 131 and is used to execute the method provided by one or more technical solutions of the relay terminal side when running a computer program. The computer program is stored in the fourth memory 133.

[0248] It should be noted that the specific processing process of the fourth processor 132 and the fourth communication interface 131 is detailed in the method embodiment and will not be repeated here.

[0249] Of course, in actual application, the various components in the relay terminal 130 are coupled together through the bus system 134. It can be understood that the bus system 134 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 134 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Fig.13 Various buses are labeled as bus system 134 .

[0250] The fourth memory 133 in the embodiment of the present application is used to store various types of data to support the operation of the relay terminal 130. Examples of such data include: any computer program used to operate on the relay terminal 130.

[0251] The method disclosed in the above embodiment of the present application can be applied to the fourth processor 132, or implemented by the fourth processor 132. The fourth processor 132 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 fourth processor 132. The above-mentioned fourth processor 132 may be a general-purpose processor, a digital data processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The fourth processor 132 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 may be located in a storage medium, which is located in the fourth memory 133, and the fourth processor 132 reads the information in the fourth memory 133 and completes the steps of the above method in combination with its hardware.

[0252] In an exemplary embodiment, the first network device 100, the second network device 110, the remote terminal 120, and the relay terminal 130 can be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers (MCUs), microprocessors, or other electronic components to execute the aforementioned method.

[0253] It can be understood that the memory (first memory 103, second memory 113) 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 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), and direct RAM bus random access memory (DRRAM).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.

[0254] 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, a memory storing a computer program, and the computer program can be executed by the first processor 102 of the first network device 100 to complete the steps of the method on the first network device side. The computer-readable storage medium can be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface storage, optical disk, or CD-ROM.

[0255] 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.

[0256] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0257] 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 method for adding a path, It is characterized in that Applied to a first network device, the method comprises: Sending a first message to a second network device; The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

2. The method according to claim 1, It is characterized in that The method further comprises: receiving a second message sent by the second network device; The second message is a confirmation message for the first message, and the confirmation message carries the RRC status information of the relay terminal.

3. The method according to claim 1, It is characterized in that The sending the first message to the second network device includes: The first message is sent to a plurality of second network devices.

4. The method according to claim 3, It is characterized in that The method further comprises: After sending the first message to the plurality of second network devices, starting timing; If the timing does not exceed the preset threshold, if a second message sent by any one of the multiple second network devices is received, and the second message indicates that the relay terminal is in an RRC connected state, stop the timing, and send a third message to other second network devices among the multiple second network devices except the any one second network device; The second message is a confirmation message for the first message, and the confirmation message carries the RRC status information of the relay terminal.

5. The method according to claim 4, It is characterized in that The method further comprises: In the case where the timing exceeds the preset threshold, if the second message sent by any second network device among the plurality of second network devices is not received, a target network terminal for establishing a non-directly connected path is selected from the plurality of second network devices.

6. The method according to claim 1, It is characterized in that The method further comprises: Receiving first information sent by the remote terminal; The first information represents the location information of the relay terminal, and the location information is obtained by the remote terminal initiating a sidelink SL positioning measurement to the relay terminal.

7. The method according to claim 6, It is characterized in that The method further comprises: The distance between the relay terminal and the first network device is determined by using the location information of the relay terminal.

8. The method according to claim 1, It is characterized in that The method further comprises: sending a fourth message to the remote terminal; The fourth message is used to instruct the remote terminal to notify the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier.

9. A method for adding a path, It is characterized in that Applied to the second network device, the method comprises: Receiving a first message sent by a first network device; The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

10. The method according to claim 9, It is characterized in that The method further comprises: A candidate relay terminal in an RRC connected state is preferentially selected from a plurality of candidate relay terminals as the relay terminal.

11. The method according to claim 9, It is characterized in that The method further comprises: Sending a second message to the first network device; the second message is a confirmation message for the first message; The confirmation message carries the RRC status information corresponding to the relay terminal.

12. A method for adding a path, It is characterized in that Applied to a remote terminal, the method comprises: Sending first information to a first network device; Among them, the first information represents the location information of the relay terminal, and the location information is obtained by the remote terminal initiating SL positioning measurement to the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when the first network device sends a first message to the second network device to request the formation of a non-direct path between the remote terminal and the second network device.

13. The method according to claim 12, It is characterized in that The method further comprises: Sending a fifth message to the relay terminal; the fifth message is used to request measurement of the position of the relay terminal; receiving measurement data sent by the relay terminal; The position of the relay terminal is measured using the measurement data to obtain the position information of the relay terminal.

14. The method according to claim 12, It is characterized in that The method further comprises: receiving a fourth message sent by the first network device; the fourth message is used to instruct the remote terminal to notify the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier; The fourth message is sent to the relay terminal.

15. A method for adding a path, It is characterized in that Applied to a relay terminal, the method comprises: sending a sixth message to the remote terminal; Among them, the sixth message is used to indicate the RRC status information of the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when the first network device sends a first message to the second network device to request to form a non-direct path between the remote terminal and the second network device.

16. The method according to claim 15, It is characterized in that In the first mode, the relay terminal corresponds to a monitoring terminal, and the remote terminal corresponds to a broadcasting terminal; In the second mode, the relay terminal corresponds to a discovered terminal, and the remote terminal corresponds to a discovered terminal.

17. The method according to claim 15, It is characterized in that The method further comprises: receiving a fourth message sent by the remote terminal; wherein the fourth message is used to instruct the relay terminal to reselect a cell; the fourth message carries relevant information of the first network device, a PLMN identifier, and a cell identifier; Based on the reference signal received power RSRP signal strength of the downlink DL, cell reselection is performed; or indication information of rejecting cell reselection is sent to the remote terminal.

18. A path adding device, It is characterized in that include: A first sending module, used to send a first message to a second network device; The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

19. A path adding device, It is characterized in that include: A receiving module, configured to receive a first message sent by a first network device; The first message is used to request to add a relay terminal in an RRC connection state between the remote terminal and the second network device to form a non-direct path.

20. A path adding device, It is characterized in that include: A second sending module, used for sending first information to the first network device; Among them, the first information represents the location information of the relay terminal, and the location information is obtained by the remote terminal initiating SL positioning measurement to the relay terminal; the relay terminal is a relay terminal in RRC state added by the first network device sending a first message to the second network device to request the formation of a non-direct path between the remote terminal and the second network device.

21. A path adding device, It is characterized in that include: A third sending module, used for sending a sixth message to the remote terminal; Among them, the sixth message is used to indicate the RRC status information of the relay terminal; the relay terminal is a relay terminal in an RRC connected state that is added when the first network device sends a first message to the second network device to request to form a non-direct path between the remote terminal and the second network device.

22. A first network device, It is characterized in that comprising a processor and a memory for storing a computer program capable of being executed on the processor, Wherein, when the processor is used to run the computer program, it executes the steps of the method described in any one of claims 1 to 8.

23. A second network device, It is characterized in that comprising a processor and a memory for storing a computer program capable of being executed on the processor, Wherein, when the processor is used to run the computer program, it executes the steps of the method described in any one of claims 9 to 11.

24. A remote terminal, It is characterized in that comprising a processor and a memory for storing a computer program capable of being executed on the processor, Wherein, when the processor is used to run the computer program, it executes the steps of the method described in any one of claims 12 to 14.

25. A relay terminal, It is characterized in that comprising a processor and a memory for storing a computer program capable of being executed on the processor, Wherein, when the processor is used to run the computer program, it executes the steps of the method described in any one of claims 15 to 17.

26. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the computer program is executed by a processor, it implements the steps of the method described in any one of claims 1 to 8, or implements the steps of the method described in any one of claims 9 to 11, or implements the steps of the method described in any one of claims 12 to 14, or implements the steps of the method described in any one of claims 15 to 17.

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