Multi-path recovery method, terminal and network side equipment

Abstract

The invention discloses a multi-path recovery method, a terminal and network side equipment, and belongs to the technical field of communication, and the multi-path recovery method in the embodiment of the invention comprises the following steps: remote UE (User Equipment) carries out radio resource control (RRC) multi-path recovery according to multi-path recovery information; wherein the Remote UE is in an RRC (Radio Resource Control) non-connection state, and the multipath recovery information comprises UE context information which is stored when the Remote UE enters the RRC non-connection state from an RRC connection state and is related to multiple paths.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a multipath recovery method, a terminal and a network side device. Background Art

[0002] In order to ensure communication quality, communication efficiency, etc., a multi-path communication scenario is provided in the related art. That is, the remote terminal (Remote UE) can establish multiple paths with the network side device at the same time, and the types of the multiple paths established can include at least one of an indirect path and a direct path.

[0003] However, for the aforementioned multi-path communication scenario, in the related technology, when performing the multi-path recovery process, the Remote UE usually needs to first recover to a single path, and then add another path by obtaining relevant context information, which results in a larger path recovery delay and air interface signaling overhead. Summary of the invention

[0004] The embodiments of the present application provide a multipath recovery method, a terminal, and a network-side device, which can solve the problems of large multipath recovery delay and large air interface signaling overhead existing in the related art.

[0005] In a first aspect, a multipath recovery method is provided, comprising: a remote terminal Remote UE performs radio resource control RRC multipath recovery according to multipath recovery information; wherein the Remote UE is in an RRC non-connected state, and the multipath recovery information includes UE context information related to the multipath saved when the Remote UE enters the RRC non-connected state from the RRC connected state.

[0006] In a second aspect, a multipath recovery method is provided, including: a network side device receives an RRC recovery request message sent by a remote terminal RemoteUE; sends an RRC recovery response message to the Remote UE, the RRC recovery response message including at least one of the following: second indication information, the second indication information is used to instruct the Remote UE to perform or not perform an RRC multipath recovery operation; a second direct path configuration, the second direct path configuration is an incremental configuration information of the first direct path configuration; a second indirect path configuration, the second indirect path configuration is an incremental configuration information of the first indirect path configuration; wherein the first direct path configuration is UE context information related to the direct path when the Remote UE is in the RRC connected state, and the first indirect path configuration is UE context information related to the indirect path when the Remote UE is in the RRC connected state.

[0007] In a third aspect, a multipath recovery device is provided, comprising: a path recovery module, used to perform wireless resource control RRC multipath recovery according to multipath recovery information; wherein, the Remote UE is in an RRC non-connected state, and the multipath recovery information includes UE context information related to the multipath saved when the Remote UE enters the RRC non-connected state from the RRC connected state.

[0008] In a fourth aspect, a multipath recovery device is provided, comprising: a receiving module, used to receive an RRC recovery request message sent by a remote terminal Remote UE; a sending module, used to send an RRC recovery response message to the Remote UE, the RRC recovery response message comprising at least one of the following: second indication information, the second indication information being used to instruct the Remote UE to perform or not perform an RRC multipath recovery operation; a second direct path configuration, the second direct path configuration being incremental configuration information of the first direct path configuration; a second indirect path configuration, the second indirect path configuration being incremental configuration information of the first indirect path configuration; wherein the first direct path configuration is UE context information related to the direct path when the Remote UE is in the RRC connected state, and the first indirect path configuration is UE context information related to the indirect path when the Remote UE is in the RRC connected state.

[0009] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0010] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method described in the first aspect.

[0011] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0012] In an eighth aspect, a network side device is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method described in the second aspect.

[0013] In a ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0014] In the tenth aspect, a wireless communication system is provided, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0015] In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0016] In the twelfth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0017] In an embodiment of the present application, when the Remote UE is in an RRC non-connected state, RRC multi-path recovery is performed through multi-path recovery information, and the multi-path recovery information includes UE context information related to multi-path saved when the Remote UE enters the RRC non-connected state from an RRC connected state. Thus, by optimizing the RRC multi-path recovery process, when the Remote UE needs to enter the RRC connected state again from the non-connected state, multi-path recovery can be performed directly according to the UE context information related to multi-path saved when the Remote UE enters the RRC non-connected state from the RRC connected state, such as performing simultaneous recovery of multiple paths, effectively avoiding the problems of large air interface signaling overhead and communication delay caused by the need to recover each path one by one when performing multi-path recovery in the related art, thereby improving the efficiency of multi-path recovery and ensuring communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1a It is a structural diagram of a wireless communication system provided by an exemplary embodiment of the present application.

[0019] Figure 1b This is one of the schematic diagrams of a multipath scenario provided by an exemplary embodiment of the present application.

[0020] Figure 1c This is the second schematic diagram of a multipath scenario provided by an exemplary embodiment of the present application.

[0021] Figure 1d This is the third schematic diagram of a multipath scenario provided by an exemplary embodiment of the present application.

[0022] Figure 2 This is one of the flowcharts of a multipath recovery method provided by an exemplary embodiment of the present application.

[0023] Figure 3 This is the second flowchart of the multipath recovery method provided by an exemplary embodiment of the present application.

[0024] Figure 4 It is a schematic diagram of the interactive process of a multipath recovery method provided by an exemplary embodiment of the present application.

[0025] Figure 5 This is the third flowchart of the multipath recovery method provided by an exemplary embodiment of the present application.

[0026] Figure 6 This is one of the structural schematic diagrams of a multipath recovery device provided by an exemplary embodiment of the present application.

[0027] Figure 7 This is the second structural schematic diagram of a multipath recovery device provided by an exemplary embodiment of the present application.

[0028] Figure 8 It is a structural diagram of a communication device provided by an exemplary embodiment of the present application.

[0029] Fig. 9 It is a schematic diagram of the structure of a terminal provided by an exemplary embodiment of the present application.

[0030] Fig.10 It is a schematic diagram of the structure of a network side device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0032] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0033] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0034] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 thGeneration, 6G) communication system.

[0035] Figure 1aA block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B, a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0036] Based on the aforementioned Figure 1a Provided wireless communication system, such as Figure 1b , Figure 1c , Figure 1d As shown, this embodiment provides schematic diagrams of several different multipath communication scenarios, wherein Figure 1b , Figure 1c , Figure 1d In the multipath communication scenario shown, the connection between the remote terminal (Remote UE) and the relay terminal (Relay UE) can be a wired connection or an ideal inter-UE connection, but not a slide link (SL) connection. The remote terminal can also be called a primary terminal (Primary UE) and the relay terminal can also be called a secondary terminal (Secondary, UE). It can be understood that Figure 1b , Figure 1c , Figure 1d The "CP" shown in the figure is a control plane path used to transmit signaling data, and the "UP" is a user plane path used to transmit service data.

[0037] In this case, for the aforementioned Figure 1b , Figure 1c , Figure 1d For a non-direct connection path, a Remote UE (or Primary UE) establishes a radio link with a network-side device through a Relay UE (or Secondary UE) and the Uu air interface of the Relay UE (or Secondary UE) to establish a Radio Resource Control (RRC) connection.

[0038] The direct connection path refers to a wireless link in which a remote terminal (or a main terminal UE) establishes an RRC connection with a network-side device through its own Uu air interface.

[0039] Based on this, the technical solution provided by the embodiments of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0040] like Figure 2 As shown, it is a flowchart of a multipath recovery method 200 provided by an exemplary embodiment of the present application. The method 200 can be, but is not limited to, executed by a Remote UE, and can be specifically executed by hardware and / or software installed in the Remote UE. In this embodiment, the method 200 can at least include the following steps.

[0041] S210, the Remote UE performs RRC multipath recovery according to the multipath recovery information.

[0042] The Remote UE is in an RRC non-connected state. In this embodiment, the RRC non-connected state may include an RRC inactive state or an RRC idle state.

[0043] The multipath recovery information includes UE context information related to multipath saved when the Remote UE enters the RRC non-connected state from the RRC connected state. That is to say, the multipath recovery information is obtained by saving the UE context information related to multipath when the Remote UE is in the RRC connected (RRC_CONNECTED) state when entering the RRC non-connected state from the RRC connected state. Thus, when the Remote UE needs to enter the RRC connected state again from the RRC non-connected state, it can directly perform RRC multipath recovery according to the saved UE context information related to multipath, such as simultaneous recovery of multiple paths, etc., effectively avoiding the problem of large air interface signaling overhead and path recovery delay caused by the need to recover paths one by one when performing multipath recovery in the related technology, improving the efficiency of multipath recovery and ensuring the communication quality.

[0044] Optionally, the RRC multipath may include but is not limited to Figure 1a , Figure 1b , Figure 1c Based on this, in one implementation, the UE context information related to the multipath may include but is not limited to at least one of the first direct path configuration and the first indirect path configuration.

[0045] The first direct path configuration is UE context information related to the direct path when the Remote UE is in the RRC connected state. For example, the first direct path configuration may include, but is not limited to, Master Cell Group (MCG) configuration and the like.

[0046] The first indirect path configuration is UE context information related to the indirect path when the Remote UE is in the RRC connected state. For example, the first indirect path configuration may include but is not limited to at least one of the following 1)-5).

[0047] 1) A first mapping relationship, used to indicate a mapping relationship between a Uu bearer identifier of the Remote UE and a Uu radio link control (Radio Link Control, RLC) channel or an RLC bearer identifier of the Relay UE.

[0048] 2) The identifier of the Remote UE.

[0049] 3) Relay UE identification.

[0050] 4) Configuration of the primary cell (PCell) corresponding to the Relay UE.

[0051] 5) Relevant configuration of the Uu RLC channel or RLC bearer corresponding to the Relay UE.

[0052] It can be understood that the Relay UE in the aforementioned 1)-5) is a Relay UE in a non-direct path in a multipath. In this embodiment, by saving the first non-direct path configuration given in 1)-5), the Remote UE can recover the non-direct path based on the first non-direct path configuration given in 1)-5), avoiding the related process of obtaining the non-direct path configuration in the related technology, effectively saving the air interface signaling overhead, and improving the path recovery efficiency.

[0053] In this embodiment, when the Remote UE is in an RRC non-connected state, RRC multi-path recovery is performed through multi-path recovery information, and the multi-path recovery information includes UE context information related to multi-path saved when the Remote UE enters the RRC non-connected state from an RRC connected state. Therefore, by optimizing the RRC multi-path recovery process, the Remote UE can directly perform RRC multi-path recovery according to the saved UE context information related to multi-path when it needs to enter the RRC connected state again from the non-connected state, such as performing simultaneous recovery of multiple paths, effectively avoiding the problems of large air interface signaling overhead and communication delay caused by the need to recover each path one by one when performing multi-path recovery in the related technology, thereby improving the multi-path recovery efficiency and ensuring the communication quality.

[0054] like Figure 3 As shown, it is a flowchart of a multipath recovery method 300 provided by an exemplary embodiment of the present application. The method 300 can be, but is not limited to, executed by a Remote UE, and can be specifically executed by hardware and / or software installed in the Remote UE. In this embodiment, the method 300 can at least include the following steps.

[0055] S310: When the Remote UE enters the RRC non-connected state from the RRC connected state, an operation of saving the UE context information related to the multipath is performed according to the UE capability information or version information.

[0056] In this embodiment, the UE capability information can be understood as the capability of the Remote UE to directly restore the multipath through the RRC resume process. Correspondingly, the version information can be understood as which 3GPP protocol version or versions the Remote UE can support, such as Rel-19. Thus, the information saving operation performed by the Remote UE can be matched with its own capabilities, thereby ensuring the reliability of multipath recovery.

[0057] It is worth noting that when the Remote UE enters the RRC non-connected state from the RRC connected state, it can perform the operation of saving the UE context information related to the multipath according to the UE capability information or version information according to the protocol agreement, network side instructions, autonomous implementation, etc., and there is no restriction here.

[0058] For example, in some embodiments, if the Remote UE performs the operation of saving the UE context information related to multipath according to the instructions of the network side, then its implementation process may include but is not limited to the Remote UE receiving a first indication message from the network side device in the RRC connected state, entering the RRC non-connected state from the RRC connected state according to the first indication message, and performing the operation of saving the UE context information related to multipath according to the UE capability information or version information.

[0059] Optionally, the first indication information may include but is not limited to an RRC connection configuration suspend release (RRCRelease with suspendconfig) message, etc.

[0060] For another example, in some other embodiments, when determining that it is necessary to enter the RRC non-connected state from the RRC connected state, the terminal may autonomously or by default perform a storage operation of UE context information related to multipath.

[0061] It can be understood that, compared with the related art, when the Remote UE enters the RRC non-connected state from the RRC connected state, it is necessary to release the UE context information related to the multipath, and in the RRC Resume process, the Remote UE needs to first restore to a single path, and then add another path, resulting in more recovery steps, and large air interface signaling overhead and delay. In this embodiment, when entering the RRC non-connected state from the RRC connected state, the UE context information related to the multipath is saved by combining the UE capability information or version information, so that when the multipath is subsequently restored, the multipath can be restored based on the saved UE context information related to the multipath, such as directly restoring to the multipath state, which effectively shortens the recovery process and saves air interface signaling overhead and delay.

[0062] S320, the Remote UE performs RRC multipath recovery according to the multipath recovery information.

[0063] The Remote UE is in an RRC non-connected state, and the multipath recovery information includes UE context information related to multipath that is saved when the Remote UE enters the RRC non-connected state from the RRC connected state.

[0064] It can be understood that the implementation process of step S320 can refer to the relevant description in the aforementioned method embodiment 200. Of course, in addition to this, as a possible implementation method, when the Remote UE performs RRC multipath recovery according to the multipath recovery information, it can also send an RRC recovery request (RRC Resume Request) message to the network side device through the Uu air interface, and the network side device can send an RRC recovery response message to the Remote UE through the Uu air interface based on the received RRC recovery request message. After receiving the RRC recovery response message sent by the network side device, the Remote UE can perform RRC multipath recovery in combination with the RRC recovery response message and the multipath recovery information.

[0065] In some embodiments, the RRC recovery response message may include at least one of the second indication information, the second direct path configuration, and the second indirect path configuration.

[0066] The second indication information is used to instruct the Remote UE to perform or not perform the RRC multipath recovery operation. In this embodiment, the second indication may be an explicit indication or an implicit indication. For example, when the second indication information is an explicit indication, the Remote UE may be instructed to perform or not perform the RRC multipath recovery operation through a bit predetermined, predefined, or otherwise agreed upon by a protocol, such as a bit "1" indicating that the Remote UE performs the RRC multipath recovery operation, and a bit "0" indicating that the Remote UE performs the RRC multipath recovery operation.

[0067] For another example, when the second indication information is an implicit indication, when the second direct path configuration and the second indirect path configuration are included in the RRC recovery response message, the Remote UE is instructed to perform an RRC multipath recovery operation; otherwise, the Remote UE is instructed not to perform an RRC multipath recovery operation, etc.

[0068] The second direct path configuration is the incremental configuration information of the first direct path configuration. That is, if the RRC recovery response message includes the second direct path configuration, the Remote UE can perform delta configuration on the saved first direct path configuration according to the second direct path configuration, which can also be called incremental configuration, thereby realizing the direct path configuration while significantly reducing the signaling overhead during the direct path configuration.

[0069] The second indirect path configuration is incremental configuration information of the first indirect path configuration. That is, if the RRC recovery response message includes the second indirect path configuration, the Remote UE may perform delta configuration on the saved first indirect path configuration according to the second indirect path configuration, which may also be called incremental configuration. Thus, while implementing the indirect path configuration, the signaling overhead during the indirect path configuration may be greatly reduced.

[0070] Based on this, in this embodiment, if the RRC recovery response message includes the second indication information, and the second indication information instructs the Remote UE to perform an RRC multipath recovery operation, then the Remote UE can perform RRC multipath recovery according to the RRC recovery response message (such as the second direct path configuration or the second indirect path configuration included in the RRC recovery response message) and the multipath recovery information.

[0071] In some implementation modes, the manner in which the Remote UE performs RRC multipath recovery according to the RRC recovery response message and the multipath recovery information may include any one of the following manners 1 to 4.

[0072] Mode 1: When the RRC recovery response message does not include the second direct path configuration and does not include the second indirect path configuration, the Remote UE performs RRC multipath recovery according to the first direct path configuration and the first indirect path configuration.

[0073] That is, when the RRC recovery response message does not include the incremental configuration related to the multipath, the RemoteUE can directly perform simultaneous recovery of the multipath according to the stored UE context information related to the multipath.

[0074] Method 2: When the RRC recovery response message includes the second direct path configuration and the second indirect path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the updated first direct path configuration and the updated first indirect path configuration.

[0075] That is, when the RRC recovery response message includes a multipath-related incremental configuration, the RemoteUE may first update the saved multipath-related UE context information according to the multipath-related incremental configuration, and then perform simultaneous multipath recovery based on the updated multipath-related UE context information.

[0076] Method 3: When the RRC recovery response message includes the second direct path configuration and does not include the second indirect path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, and performs RRC multipath recovery based on the first indirect path configuration and the updated first direct path configuration.

[0077] That is, when the RRC recovery response message only includes the incremental configuration of the direct path, the RemoteUE may first update the saved UE context information related to the direct path according to the incremental configuration of the direct path, and then recover the direct path based on the updated UE context information related to the direct path, and at the same time, recover the indirect path based on the saved UE context information related to the indirect path.

[0078] Method 4: When the RRC recovery response message does not include the second direct path configuration but includes the second indirect path configuration, the Remote UE updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the first direct path configuration and the updated first indirect path configuration.

[0079] That is, when the RRC recovery response message only includes the incremental configuration of the non-direct path, the RemoteUE may first update the saved UE context information related to the non-direct path according to the incremental configuration of the non-direct path, and then recover the non-direct path based on the updated UE context information related to the non-direct path, and at the same time, recover the direct path based on the saved UE context information related to the direct path.

[0080] It is worth noting that the flexibility and adaptability of RRC multipath recovery can be ensured through the several different RRC multipath recovery methods provided in the aforementioned methods 1 to 4.

[0081] In some embodiments, if the Remote UE performs an RRC multipath recovery operation based on the aforementioned process and satisfies at least one of the following conditions 1-2, then the Remote UE may determine that the RRC multipath recovery operation fails.

[0082] Condition 1: The target operation fails, and the target operation includes the operation of updating the first direct path configuration according to the second direct path configuration, or the operation of updating the first indirect path configuration according to the second indirect path configuration. That is, the Remote UE fails to perform delta configuration according to the second indirect path configuration or the second quality path configuration included in the RRC recovery response message, and can determine that the RRC multipath recovery operation fails.

[0083] Condition 2: The primary cell (PCell) or serving cell (serving cell) of the relay UE fails or changes. For example, the quality of the relay UE's PCell is lower than a certain threshold, the relay UE fails to switch, the relay UE reselects a cell, or the serving cell switching corresponding to the relay UE causes the PCell to change.

[0084] In this embodiment, by setting the aforementioned condition 1-condition 2, the Remote UE can accurately determine whether the RRC multipath recovery operation fails, so as to avoid affecting the communication quality due to the failure of the RRC multipath recovery operation.

[0085] In some embodiments, if the Remote UE determines that the RRC multipath recovery operation fails, the Remote UE may perform at least one of the following operations 4 or 5.

[0086] Operation 4: Falling back to a single path, where the single path includes a direct connection path, thereby ensuring communication quality and avoiding problems such as communication interruption that may be caused by failure to perform an RRC multipath recovery operation.

[0087] Operation 5: Send a first message to the network side device, wherein the first message carries an indication of the failure of the RRC multipath recovery or a reason for the failure of the RRC multipath recovery, thereby enabling the network side device to understand the failure of the RRC multipath recovery operation on the Remote UE or the reason for the failure of the RRC multipath recovery, so as to facilitate the subsequent optimization of the RRC multipath configuration.

[0088] Optionally, the indication information of the RRC multipath recovery failure includes the indication information of the indirect path recovery failure; or, the cause of the RRC multipath recovery failure includes: the indirect path recovery failure.

[0089] In some embodiments, when the Remote UE sends the first information to the network side device, the first information may be carried by at least one of an RRC resume complete (RRC Resume Complete) message, a UE assistance information (UE Assistance Information) message, and an RRC message dedicated to sending the first information.

[0090] Of course, in this embodiment, in addition to the situation where the aforementioned second indication information instructs the Remote UE to perform the RRC multipath recovery operation, in other embodiments, if the second indication information instructs the Remote UE not to perform the RRC multipath recovery operation, then, in order to ensure the communication quality, the Remote UE may also perform at least one of the following operations 1-3.

[0091] Operation 1: Delete the first indirect path configuration.

[0092] Operation 2: when the RRC recovery response message includes the second direct path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, and recovers the direct path based on the updated first direct path configuration.

[0093] Operation 3: When the RRC recovery response message does not include the second direct path configuration, the Remote UE recovers the direct path based on the first direct path configuration.

[0094] It can be understood that regarding the aforementioned operations 1 to 3, the Remote UE may perform operations 2 or 3 while performing operation 1, or may only perform any one of operations 1 to 3, and no limitation is made herein.

[0095] In this embodiment, by optimizing the RRC multipath recovery process, the air interface signaling overhead of the RRC multipath establishment process is effectively reduced, and in certain specific cases (when the multipath link quality is relatively good for a period of time), the delay of multipath establishment can also be shortened by directly recovering to the multipath operation.

[0096] Based on the description of the foregoing method embodiments 200-300, the implementation process of the multipath recovery method provided by the present application is further described in combination with Example 1, as follows: It is assumed that the network side device is a serving base station.

[0097] S410, the Remote UE receives first indication information sent by the serving base station in the RRC connected state.

[0098] S420, the Remote UE saves the multipath recovery information, that is, the UE context information related to the multipath, when entering the RRC non-connected state from the RRC connected state according to the first indication information, which may include but is not limited to the first direct path configuration and the first indirect path configuration.

[0099] S430, the Remote UE sends an RRC recovery request message to the serving base station through the Uu air interface.

[0100] S440, the Remote UE receives an RRC recovery response message sent by the serving base station to the Remote UE via the Uu air interface, wherein the RRC recovery response message includes at least one of the second indication information, the second direct path configuration, and the second indirect path configuration.

[0101] S450, the Remote UE performs multipath recovery according to the RRC recovery response message and the multipath recovery information.

[0102] For example, when the second indication information instructs the Remote UE to perform an RRC multipath recovery operation, the manner in which the Remote UE performs RRC multipath recovery according to the RRC recovery response message and the multipath recovery information may include any one of the following manners 1 to 4.

[0103] Mode 1: When the RRC recovery response message does not include the second direct path configuration and does not include the second indirect path configuration, the Remote UE performs RRC multipath recovery according to the first direct path configuration and the first indirect path configuration.

[0104] Method 2: When the RRC recovery response message includes the second direct path configuration and the second indirect path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the updated first direct path configuration and the updated first indirect path configuration.

[0105] Method 3: When the RRC recovery response message includes the second direct path configuration and does not include the second indirect path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, and performs RRC multipath recovery based on the first indirect path configuration and the updated first direct path configuration.

[0106] Method 4: When the RRC recovery response message does not include the second direct path configuration but includes the second indirect path configuration, the Remote UE updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the first direct path configuration and the updated first indirect path configuration.

[0107] For another example, when the second indication information instructs the Remote UE not to perform the RRC multipath recovery operation, the Remote UE performs at least one of the following operations 1 to 3.

[0108] Operation 1: Delete the first indirect path configuration.

[0109] Operation 2: when the RRC recovery response message includes the second direct path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, and recovers the direct path based on the updated first direct path configuration.

[0110] Operation 3: When the RRC recovery response message does not include the second direct path configuration, the Remote UE recovers the direct path based on the first direct path configuration.

[0111] S460, the Remote UE sends first information to the serving base station through the Uu air interface.

[0112] If the RRC multipath recovery operation is successfully performed, then the first information may be an RRC recovery completion message, used to indicate that the serving base station RRC multipath recovery is successful.

[0113] If the Remote UE determines that the RRC multipath recovery operation has failed based on at least one of Conditions 1-2, the first information may be at least one of an RRC recovery completion message, a UE auxiliary information message, and an RRC message dedicated to sending the first information, and the first information carries indication information of the RRC multipath recovery failure or the cause of the RRC multipath recovery failure.

[0114] Condition 1: a target operation fails, the target operation including the operation of updating the first direct path configuration according to the second direct path configuration, or the operation of updating the first indirect path configuration according to the second indirect path configuration.

[0115] Condition 2: The PCell or serving cell of the Relay UE fails or changes.

[0116] Of course, if the Remote UE determines that the RRC multi-path recovery operation fails, the Remote UE may fall back to a single path, such as a direct path, to ensure communication quality.

[0117] It can be understood that the implementation process of S410-S420 can refer to the relevant descriptions in the aforementioned method embodiments 200-300, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0118] In addition, depending on the RRC multipath recovery process, its implementation process may include more or fewer steps than the aforementioned S410-S460, which is not limited here.

[0119] like Figure 5 FIG. 5 is a flow chart of a multipath recovery method 500 provided by an exemplary embodiment of the present application. The method 500 may be, but is not limited to, executed by a network side device, and may be specifically executed by hardware and / or software installed in the network side device. In this embodiment, the method 500 may at least include the following steps.

[0120] S510: The network side device receives an RRC recovery request message sent by the remote terminal Remote UE.

[0121] S520: Send an RRC recovery response message to the Remote UE.

[0122] The RRC recovery response message includes at least one of the following: second indication information, the second indication information is used to instruct the Remote UE to perform or not perform the RRC multipath recovery operation; a second direct path configuration, the second direct path configuration is the incremental configuration information of the first direct path configuration; a second indirect path configuration, the second indirect path configuration is the incremental configuration information of the first indirect path configuration; wherein the first direct path configuration is the UE context information related to the direct path when the Remote UE is in the RRC connected state, and the first indirect path configuration is the UE context information related to the indirect path when the Remote UE is in the RRC connected state.

[0123] Optionally, the method further includes: receiving first information sent by the Remote UE; wherein the first information carries indication information of the RRC multipath recovery failure or a reason for the RRC multipath recovery failure.

[0124] Optionally, the indication information of the RRC multipath recovery failure includes the indication information of the indirect path recovery failure; or, the cause of the RRC multipath recovery failure includes: the indirect path recovery failure.

[0125] Optionally, the first information is carried in at least one of the following: an RRC recovery completion message; UE auxiliary information; an RRC message dedicated to sending the first information.

[0126] Optionally, the method also includes: the network side device sends a first indication message to the Remote UE; wherein, the first indication information is used to make the Remote UE, which is at least in the RRC connected state, enter the RRC non-connected state, and perform the operation of saving the UE context information related to the multipath according to the UE capability information or version information.

[0127] It can be understood that method embodiment 500 has the same or corresponding technical features as the aforementioned method embodiments 200-300. Therefore, the relevant descriptions of each implementation method in method embodiment 500 can refer to the relevant descriptions in the aforementioned method embodiments 200-300, and achieve the same or corresponding technical effects. To avoid repetition, they will not be repeated here.

[0128] The multipath recovery method provided in the embodiment of the present application can be executed by a multipath recovery device. In the embodiment of the present application, the multipath recovery device executing the multipath recovery method is taken as an example to illustrate the multipath recovery device provided in the embodiment of the present application.

[0129] like Figure 6 As shown, it is a structural diagram of a multipath recovery device provided in an embodiment of the present application, the device 600 includes a path recovery module 610, which is used to perform wireless resource control RRC multipath recovery according to multipath recovery information; wherein, the Remote UE is in an RRC non-connected state, and the multipath recovery information includes UE context information related to the multipath saved when the Remote UE enters the RRC non-connected state from the RRC connected state.

[0130] Optionally, the device 600 further includes an ensuring module, configured to determine the multipath restoration information.

[0131] Optionally, the UE context information related to the multipath includes at least one of the following: a first direct path configuration, which is the UE context information related to the direct path when the Remote UE is in the RRC connected state; and a first indirect path configuration, which is the UE context information related to the indirect path when the Remote UE is in the RRC connected state.

[0132] Optionally, the first direct path configuration includes a main cell group MCG configuration; or; the first indirect path configuration includes at least one of the following: a first mapping relationship, used to indicate the mapping relationship between the Uu bearer identifier of the Remote UE and the Uu radio link control RLC channel or RLC bearer identifier of the relay terminal Relay UE; the identifier of the Remote UE; the identifier of the Relay UE; the main cell PCell configuration corresponding to the Relay UE; and the related configuration of the Uu RLC channel or RLC bearer corresponding to the Relay UE.

[0133] Optionally, the path recovery module 610 is further configured to, when entering the RRC non-connected state from the RRC connected state, perform an operation of saving the UE context information related to the multipath according to the UE capability information or version information.

[0134] Optionally, when the Remote UE enters the RRC non-connected state from the RRC connected state, the operation of saving the UE context information related to the multipath is performed according to the UE capability information or version information, including: the Remote UE receives a first indication message from the network side device in the RRC connected state; according to the first indication message, enters the RRC non-connected state from the RRC connected state, and performs the operation of saving the UE context information related to the multipath according to the UE capability information or version information.

[0135] Optionally, the apparatus 600 further includes: a sending module, configured to send an RRC recovery request message to a network side device;

[0136] A receiving module, used to receive an RRC recovery response message sent by the network side device, the RRC recovery response message including at least one of the following: second indication information, the second indication information is used to instruct the Remote UE to perform or not perform an RRC multipath recovery operation; a second direct path configuration, the second direct path configuration is incremental configuration information of the first direct path configuration; a second indirect path configuration, the second indirect path configuration is incremental configuration information of the first indirect path configuration.

[0137] Optionally, the path recovery module 610 performs RRC multipath recovery according to the multipath recovery information, including: when the second indication information instructs the Remote UE to perform an RRC multipath recovery operation, the Remote UE performs RRC multipath recovery according to the RRC recovery response message and the multipath recovery information.

[0138] Optionally, the path recovery module 610 also performs RRC multipath recovery according to the RRC recovery response message and the multipath recovery information, including any of the following items: when the RRC recovery response message does not include the second direct path configuration and does not include the second indirect path configuration, the Remote UE performs RRC multipath recovery according to the first direct path configuration and the first indirect path configuration; when the RRC recovery response message includes the second direct path configuration and the second indirect path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the updated first direct path configuration and the updated first indirect path configuration; when the RRC recovery response message includes the second direct path configuration and does not include the second indirect path configuration, the Remote UE The UE updates the first direct path configuration according to the second direct path configuration, and performs RRC multipath recovery based on the first indirect path configuration and the updated first direct path configuration; when the RRC recovery response message does not include the second direct path configuration but includes the second indirect path configuration, the Remote UE updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the first direct path configuration and the updated first indirect path configuration.

[0139] Optionally, the path recovery module 610 is also used for any one of the following: when the second indication information indicates that the Remote UE does not perform the RRC multipath recovery operation, the Remote UE deletes the first non-direct path configuration; when the RRC recovery response message includes the second direct path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, and restores the direct path based on the updated first direct path configuration; when the RRC recovery response message does not include the second direct path configuration, the Remote UE restores the direct path based on the first direct path configuration.

[0140] Optionally, the path recovery module 610 is also used to execute at least one of the following when it is determined that the RRC multipath recovery operation has failed: fall back to a single path, the single path including a direct path; sending first information to the network side device, wherein the first information carries an indication of the failure of the RRC multipath recovery or a reason for the failure of the RRC multipath recovery.

[0141] Optionally, the indication information of the RRC multipath recovery failure includes the indication information of the indirect path recovery failure; or, the cause of the RRC multipath recovery failure includes: the indirect path recovery failure.

[0142] Optionally, the first information is carried in at least one of the following: an RRC recovery completion message; a UE auxiliary information message; an RRC message dedicated to sending the first information.

[0143] Optionally, the path recovery module 610 is also used to determine that the RRC multipath recovery operation fails to execute when at least one of the following is met: a target operation fails, the target operation including the operation of updating the first direct path configuration according to the second direct path configuration, or the operation of updating the first non-direct path configuration according to the second non-direct path configuration; the primary cell or service cell of the Relay UE fails or changes.

[0144] The multipath recovery device 600 in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or can be other devices other than a terminal. Exemplarily, the terminal can include but is not limited to the types of the terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0145] The multipath recovery device 600 provided in the embodiment of the present application can achieve Figures 2 to 3 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0146] like Figure 7As shown, it is a structural schematic diagram of a multipath recovery device 700 provided in an embodiment of the present application, and the device 700 includes a receiving module 710, which is used to receive an RRC recovery request message sent by a remote terminal Remote UE; a sending module 720, which is used to send an RRC recovery response message to the Remote UE, and the RRC recovery response message includes at least one of the following: second indication information, the second indication information is used to indicate that the Remote UE performs or does not perform an RRC multipath recovery operation; a second direct path configuration, the second direct path configuration is an incremental configuration information of the first direct path configuration; a second indirect path configuration, the second indirect path configuration is an incremental configuration information of the first indirect path configuration; wherein the first direct path configuration is UE context information related to the direct path when the Remote UE is in the RRC connected state, and the first indirect path configuration is UE context information related to the indirect path when the Remote UE is in the RRC connected state.

[0147] Optionally, the receiving module 710 is further used to: receive first information sent by the Remote UE; wherein the first information carries indication information of the RRC multipath recovery failure or the reason for the RRC multipath recovery failure.

[0148] Optionally, the indication information of the RRC multipath recovery failure includes the indication information of the indirect path recovery failure; or, the cause of the RRC multipath recovery failure includes: the indirect path recovery failure.

[0149] Optionally, the first information is carried in at least one of the following: an RRC recovery completion message; UE auxiliary information; an RRC message dedicated to sending the first information.

[0150] Optionally, the sending module 720 is also used to send a first indication message to the Remote UE; wherein the first indication information is used to enable at least the Remote UE in the RRC connected state to enter the RRC non-connected state, and to perform an operation of saving the UE context information related to the multipath according to the UE capability information or version information.

[0151] The multipath recovery device 700 in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a network side device, and the network side device may include, but is not limited to, the types of the network side devices 12 listed above, which are not specifically limited in the embodiment of the present application.

[0152] The network side device provided in the embodiment of the present application can achieve Figure 5 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0153] like Figure 8 As shown, the embodiment of the present application further provides a communication device 800, including a processor 801 and a memory 802, and the memory 802 stores a program or instruction that can be run on the processor 801. For example, when the communication device 800 is a terminal, the program or instruction is executed by the processor 801 to implement the various steps of the above-mentioned multipath recovery method embodiment, and can achieve the same technical effect. When the communication device 800 is a network side device, the program or instruction is executed by the processor 801 to implement the various steps of the above-mentioned multipath recovery method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0154] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 2-Figure 3 The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig. 9 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0155] The terminal 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909 and at least some of the components of a processor 910.

[0156] Those skilled in the art will appreciate that the terminal 900 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 910 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig. 9 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0157] It should be understood that in the embodiment of the present application, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042, and the graphics processor 9041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0158] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 901 can transmit the data to the processor 910 for processing; in addition, the RF unit 901 can send uplink data to the network side device. Generally, the RF unit 901 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0159] The memory 909 can be used to store software programs or instructions and various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 909 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may 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), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0160] The processor 910 may include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 910.

[0161] Among them, the processor 910 is used to perform radio resource control RRC multipath recovery according to the multipath recovery information; wherein the Remote UE is in an RRC non-connected state, and the multipath recovery information includes UE context information related to the multipath saved when the Remote UE enters the RRC non-connected state from the RRC connected state.

[0162] Optionally, the UE context information related to the multipath includes at least one of the following: a first direct path configuration, which is the UE context information related to the direct path when the Remote UE is in the RRC connected state; and a first indirect path configuration, which is the UE context information related to the indirect path when the Remote UE is in the RRC connected state.

[0163] Optionally, the first direct path configuration includes a main cell group MCG configuration; or; the first indirect path configuration includes at least one of the following: a first mapping relationship, used to indicate the mapping relationship between the Uu bearer identifier of the Remote UE and the Uu radio link control RLC channel or RLC bearer identifier of the relay terminal Relay UE; the identifier of the Remote UE; the identifier of the Relay UE; the main cell PCell configuration corresponding to the Relay UE; and the related configuration of the Uu RLC channel or RLC bearer corresponding to the Relay UE.

[0164] Optionally, the processor 910 is further configured to, when entering the RRC non-connected state from the RRC connected state, perform an operation of saving the UE context information related to the multipath according to the UE capability information or version information.

[0165] Optionally, when the Remote UE enters the RRC non-connected state from the RRC connected state, the operation of saving the UE context information related to the multipath is performed according to the UE capability information or version information, including: the Remote UE receives a first indication message from the network side device in the RRC connected state; according to the first indication message, enters the RRC non-connected state from the RRC connected state, and performs the operation of saving the UE context information related to the multipath according to the UE capability information or version information.

[0166] Optionally, the radio frequency unit 901 is used to send an RRC recovery request message to a network side device; and receive an RRC recovery response message sent by the network side device, the RRC recovery response message including at least one of the following: second indication information, the second indication information is used to indicate the Remote UE to perform or not perform an RRC multipath recovery operation; a second direct path configuration, the second direct path configuration is incremental configuration information of the first direct path configuration; a second indirect path configuration, the second indirect path configuration is incremental configuration information of the first indirect path configuration.

[0167] Optionally, the processor 910 performs RRC multipath recovery according to the multipath recovery information, including: when the second indication information instructs the Remote UE to perform an RRC multipath recovery operation, the Remote UE performs RRC multipath recovery according to the RRC recovery response message and the multipath recovery information.

[0168] Optionally, the processor 910 also performs RRC multipath recovery according to the RRC recovery response message and the multipath recovery information, including any of the following items: when the RRC recovery response message does not include the second direct path configuration and does not include the second indirect path configuration, the Remote UE performs RRC multipath recovery according to the first direct path configuration and the first indirect path configuration; when the RRC recovery response message includes the second direct path configuration and the second indirect path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the updated first direct path configuration and the updated first indirect path configuration; when the RRC recovery response message includes the second direct path configuration and does not include the second indirect path configuration, the Remote UE The UE updates the first direct path configuration according to the second direct path configuration, and performs RRC multipath recovery based on the first indirect path configuration and the updated first direct path configuration; when the RRC recovery response message does not include the second direct path configuration but includes the second indirect path configuration, the Remote UE updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the first direct path configuration and the updated first indirect path configuration.

[0169] Optionally, the processor 910 is also used for any one of the following: when the second indication information indicates that the Remote UE does not perform the RRC multipath recovery operation, the Remote UE deletes the first non-direct path configuration; when the RRC recovery response message includes the second direct path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, and restores the direct path based on the updated first direct path configuration; when the RRC recovery response message does not include the second direct path configuration, the Remote UE restores the direct path based on the first direct path configuration.

[0170] Optionally, the processor 910 is also used to execute at least one of the following items when it is determined that the RRC multipath recovery operation has failed: fall back to a single path, the single path including a direct path; sending first information to the network side device, wherein the first information carries an indication of the failure of the RRC multipath recovery or a reason for the failure of the RRC multipath recovery.

[0171] Optionally, the indication information of the RRC multipath recovery failure includes the indication information of the indirect path recovery failure; or, the cause of the RRC multipath recovery failure includes: the indirect path recovery failure.

[0172] Optionally, the first information is carried in at least one of the following: an RRC recovery completion message; a UE auxiliary information message; an RRC message dedicated to sending the first information.

[0173] Optionally, the processor 910 is further used to: determine that the RRC multipath recovery operation fails to execute when at least one of the following items is met: a target operation fails, the target operation including the operation of updating the first direct path configuration according to the second direct path configuration, or the operation of updating the first non-direct path configuration according to the second non-direct path configuration; the primary cell or service cell of the Relay UE fails or changes.

[0174] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiments 200-300, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0175] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 5 The steps of the method embodiment shown. This network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0176] Specifically, the embodiment of the present application also provides a network side device. Fig.10As shown, the network side device 1000 includes: an antenna 1001, a radio frequency device 1002, a baseband device 1003, a processor 1004 and a memory 1005. The antenna 1001 is connected to the radio frequency device 1002. In the uplink direction, the radio frequency device 1002 receives information through the antenna 1001 and sends the received information to the baseband device 1003 for processing. In the downlink direction, the baseband device 1003 processes the information to be sent and sends it to the radio frequency device 1002. The radio frequency device 1002 processes the received information and sends it out through the antenna 1001.

[0177] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1003 , which includes a baseband processor.

[0178] The baseband device 1003 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.10 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1005 through a bus interface to call the program in the memory 1005 to execute the network device operations shown in the above method embodiment.

[0179] The network side device may further include a network interface 1006, which is, for example, a Common Public Radio Interface (CPRI).

[0180] Specifically, the network side device 1000 of the embodiment of the present application further includes: instructions or programs stored in the memory 1005 and executable on the processor 1004, and the processor 1004 calls the instructions or programs in the memory 1005 to execute Figure 7 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0181] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned multipath recovery method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0182] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0183] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned multipath recovery method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0184] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0185] The embodiment of the present application further provides a computer program / program product, which is stored in a storage medium, and is executed by at least one processor to implement the various processes of the above-mentioned multipath recovery method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0186] An embodiment of the present application also provides a wireless communication system, including: a terminal and a network side device, wherein the terminal can be used to implement the various processes of the above-mentioned multi-path recovery method embodiments 200-300, and the network side device can be used to implement the various processes of the above-mentioned multi-path recovery method embodiment 500, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0187] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0188] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0189] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A multipath recovery method, characterized in that: include: The remote terminal Remote UE performs radio resource control RRC multipath recovery according to the multipath recovery information; The Remote UE is in an RRC non-connected state, and the multipath recovery information includes UE context information related to multipath that is saved when the Remote UE enters the RRC non-connected state from the RRC connected state.

2. The method according to claim 1, wherein the UE context information related to the multipath comprises at least one of the following: a first direct path configuration, where the first direct path configuration is UE context information related to the direct path when the Remote UE is in the RRC connected state; The first indirect path configuration is UE context information related to the indirect path when the Remote UE is in the RRC connected state.

3. The method according to claim 2, wherein the first direct path configuration comprises a master cell group (MCG) configuration; or; The first indirect path configuration includes at least one of the following: The first mapping relationship is used to indicate a mapping relationship between a Uu bearer identifier of the Remote UE and a Uu radio link control RLC channel or an RLC bearer identifier of the relay terminal Relay UE; The identifier of the Remote UE; Relay UE identifier; Configuration of the primary cell PCell corresponding to the Relay UE; Relay UE corresponds to the Uu RLC channel or RLC bearer configuration.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: When the Remote UE enters the RRC non-connected state from the RRC connected state, an operation of saving the UE context information related to the multipath is performed according to the UE capability information or version information.

5. The method according to claim 4, characterized in that When the Remote UE enters the RRC non-connected state from the RRC connected state, performing an operation of saving the UE context information related to the multipath according to the UE capability information or the version information, including: The Remote UE receives a first indication message from a network side device in an RRC connected state; According to the first indication message, the RRC connected state is entered into the RRC non-connected state, and the operation of saving the UE context information related to the multipath is performed according to the UE capability information or version information.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: The Remote UE sends an RRC recovery request message to the network side device; Receive an RRC recovery response message sent by the network side device, where the RRC recovery response message includes at least one of the following: Second indication information, where the second indication information is used to instruct the Remote UE to perform or not perform an RRC multipath recovery operation; a second direct path configuration, where the second direct path configuration is incremental configuration information of the first direct path configuration; The second indirect path configuration is incremental configuration information of the first indirect path configuration.

7. The method according to claim 6, characterized in that The Remote UE performs RRC multipath recovery according to the multipath recovery information, including: In a case where the second indication information instructs the Remote UE to perform an RRC multipath recovery operation, the Remote UE performs RRC multipath recovery according to the RRC recovery response message and the multipath recovery information.

8. The method according to claim 7, characterized in that The Remote UE performs RRC multipath recovery according to the RRC recovery response message and the multipath recovery information, including any of the following: When the RRC recovery response message does not include the second direct path configuration and does not include the second indirect path configuration, the Remote UE performs RRC multipath recovery according to the first direct path configuration and the first indirect path configuration; In a case where the RRC recovery response message includes the second direct path configuration and the second indirect path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the updated first direct path configuration and the updated first indirect path configuration; In a case where the RRC recovery response message includes the second direct path configuration but does not include the second indirect path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, and performs RRC multipath recovery based on the first indirect path configuration and the updated first direct path configuration; In a case where the RRC recovery response message does not include the second direct path configuration but includes the second indirect path configuration, the Remote UE updates the first indirect path configuration according to the second indirect path configuration, and performs RRC multipath recovery based on the first direct path configuration and the updated first indirect path configuration.

9. The method according to claim 6, characterized in that The method further comprises any of the following: When the second indication information indicates that the Remote UE does not perform an RRC multipath recovery operation, the Remote UE deletes the first indirect path configuration; In a case where the RRC recovery response message includes the second direct path configuration, the Remote UE updates the first direct path configuration according to the second direct path configuration, and recovers the direct path based on the updated first direct path configuration; In a case where the RRC recovery response message does not include the second direct path configuration, the Remote UE recovers the direct path based on the first direct path configuration.

10. The method according to any one of claims 1 to 9, characterized in that The method further comprises: In the case of determining that the RRC multipath recovery operation fails to be performed, the Remote UE performs at least one of the following: Falling back to a single path, the single path comprising a direct connection path; Sending first information to the network side device, wherein the first information carries indication information of the RRC multipath recovery failure or a reason for the RRC multipath recovery failure.

11. The method according to claim 10, characterized in that The RRC multipath recovery failure indication information includes the indirect path recovery failure indication information; Or, the reason for the failure of the RRC multipath recovery includes: the failure of the indirect path recovery.

12. The method according to claim 10, characterized in that The first information carries at least one of the following: RRC recovery complete message; UE assistance information message; An RRC message dedicated to sending the first information.

13. The method according to any one of claims 1 to 12, characterized in that The method further comprises: When at least one of the following conditions is met, it is determined that the RRC multipath recovery operation fails to execute: a target operation fails, the target operation including the operation of updating the first direct path configuration according to the second direct path configuration, or the operation of updating the first indirect path configuration according to the second indirect path configuration; The primary cell or serving cell of the Relay UE fails or changes.

14. A multipath recovery method, characterized in that: include: The network side device receives the RRC recovery request message sent by the remote terminal Remote UE; Sending an RRC recovery response message to the Remote UE, where the RRC recovery response message includes at least one of the following: Second indication information, where the second indication information is used to instruct the Remote UE to perform or not perform an RRC multipath recovery operation; a second direct path configuration, where the second direct path configuration is incremental configuration information of the first direct path configuration, wherein the first direct path configuration is UE context information related to the direct path when the Remote UE is in the RRC connected state; The second indirect path configuration is incremental configuration information of the first indirect path configuration, wherein the first indirect path configuration is UE context information related to the indirect path when the Remote UE is in the RRC connected state.

15. The method according to claim 14, characterized in that The method further comprises: Receiving first information sent by the Remote UE; The first information carries the indication information of the RRC multipath recovery failure or the reason for the RRC multipath recovery failure.

16. The method according to claim 15, characterized in that The RRC multipath recovery failure indication information includes the indirect path recovery failure indication information; Or, the reason for the failure of the RRC multipath recovery includes: the failure of the indirect path recovery.

17. The method according to claim 15, characterized in that The first information carries at least one of the following: RRC recovery complete message; UE assistance information; An RRC message dedicated to sending the first information.

18. The method according to any one of claims 13 to 17, characterized in that The method further comprises: The network side device sends a first indication message to the Remote UE; The first indication information is used to cause at least the Remote UE in the RRC connected state to enter the RRC non-connected state, and to perform an operation of saving the UE context information related to the multipath according to the UE capability information or version information.

19. A multipath recovery device, characterized in that: include: A path recovery module, used for performing radio resource control RRC multipath recovery according to multipath recovery information; The Remote UE is in an RRC non-connected state, and the multipath recovery information includes UE context information related to multipath that is saved when the Remote UE enters the RRC non-connected state from the RRC connected state.

20. A multipath recovery device, characterized in that: include: A receiving module, used for receiving an RRC recovery request message sent by a remote terminal Remote UE; A sending module, configured to send an RRC recovery response message to the Remote UE, where the RRC recovery response message includes at least one of the following: Second indication information, where the second indication information is used to instruct the Remote UE to perform or not perform an RRC multipath recovery operation; a second direct path configuration, where the second direct path configuration is incremental configuration information of the first direct path configuration, wherein the first direct path configuration is UE context information related to the direct path when the Remote UE is in the RRC connected state; The second indirect path configuration is incremental configuration information of the first indirect path configuration, wherein the first indirect path configuration is UE context information related to the indirect path when the Remote UE is in the RRC connected state.

21. A terminal, characterized in that: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method according to any one of claims 1 to 13 are implemented.

22. A network side device, characterized in that: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method according to any one of claims 14 to 18 are implemented.

23. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps of the method according to any one of claims 1 to 13 are implemented, or the steps of the method according to any one of claims 14 to 18 are implemented.

Images