Wireless communication method, terminal device, and network device

Abstract

Provided are a wireless communication method, a terminal device, and a network device. The method comprises: a terminal device executing a first operation for a first configuration, wherein the first configuration is used for configuring LTM, and the first operation comprises one or more of the following: releasing part or all of the first configuration; retaining part or all of the first configuration; and suspending the use of part or all of the first configuration.

Description

Method, terminal device and network device for wireless communication Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a method, terminal device, and network device for wireless communication. Background Art

[0002] To shorten handover latency, some communication systems, such as new radio (NR) systems, support Layer 1 / Layer 2 triggered mobility (LTM). Terminal devices can execute LTM procedures based on LTM configurations sent by network devices. Terminal devices can then process the LTM configurations differently based on different scenarios.

[0003] Summary of the Invention

[0004] The present application provides a method, terminal device, and network device for wireless communication, which are conducive to ensuring that the processing method of LTM configuration is applicable to various scenarios (for example, existing LTM scenarios and extended LTM scenarios), with a wider range of adaptability. The following introduces various aspects involved in this application.

[0005] In a first aspect, a method for wireless communication is provided, including: a terminal device performs a first operation for a first configuration, the first configuration is used to configure LTM, and the first operation includes one or more of the following: releasing part or all of the configurations in the first configuration; retaining part or all of the configurations in the first configuration; suspending the use of part or all of the configurations in the first configuration.

[0006] In a second aspect, a method for wireless communication is provided, including: a network device sends indication information to a terminal device, the indication information is used to indicate a first operation for a first configuration, the first configuration is used to configure LTM, and the first operation includes one or more of the following: releasing part or all of the configurations in the first configuration; retaining part or all of the configurations in the first configuration; suspending the use of part or all of the configurations in the first configuration.

[0007] In a third aspect, a terminal device is provided, including: an execution module for performing a first operation on a first configuration, wherein the first configuration is used to configure LTM, and the first operation includes one or more of the following: releasing part or all of the configurations in the first configuration; retaining part or all of the configurations in the first configuration; suspending the use of part or all of the configurations in the first configuration.

[0008] In a fourth aspect, a network device is provided, including: a sending module for sending indication information to a terminal device, wherein the indication information is used to indicate a first operation for a first configuration, wherein the first configuration is used to configure LTM, and the first operation includes one or more of the following: releasing part or all of the configurations in the first configuration; retaining part or all of the configurations in the first configuration; suspending the use of part or all of the configurations in the first configuration.

[0009] In a fifth aspect, a terminal device is provided, comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0010] In the sixth aspect, a network device is provided, comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided in the embodiment of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program enables a computer to execute part or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a computer to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0014] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] In an embodiment of the present application, a terminal device may perform one or more of the following operations on the first configuration used to configure LTM: releasing some or all of the configurations in the first configuration, retaining some or all of the configurations in the first configuration, or suspending some or all of the configurations in the first configuration. These operations are beneficial for improving the handover success rate, reducing signaling overhead, or shortening handover latency. Furthermore, the solution of the embodiment of the present application is compatible with existing LTM scenarios and extended LTM scenarios, and has a wider range of adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is an exemplary diagram of a system architecture of a wireless communication system to which an embodiment of the present application may be applied.

[0017] FIG2 is a schematic diagram of the control plane networking method in the dual-connection scenario of EN-DC.

[0018] FIG3 is another exemplary diagram of a system architecture of a wireless communication system to which embodiments of the present application may be applied.

[0019] FIG4 is a schematic diagram of the LTM process.

[0020] FIG5 is a flowchart of a method for wireless communication provided in an embodiment of the present application.

[0021] FIG6 is a flowchart of a method for wireless communication provided in another embodiment of the present application.

[0022] FIG7 is a schematic diagram of the structure of the terminal device provided in an embodiment of the present application.

[0023] FIG8 is a schematic diagram of the structure of a network device provided in an embodiment of the present application.

[0024] FIG9 is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] Communication system architecture

[0026] FIG1 is a diagram illustrating an exemplary system architecture of a wireless communication system 100 to which embodiments of the present application may be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 within the coverage area.

[0027] FIG1 exemplarily shows a network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in this embodiment of the present application.

[0028] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0029] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: the fifth generation (5G) system or NR, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0030] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through the base station.

[0031] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, modem or chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0032] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0033] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0034] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0035] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0036] Dual-connection communication scenario

[0037] The method provided in the embodiment of the present application can be used for various dual connection (dual connection, DC) architectures. For example, the dual connection of the fourth generation (4G) communication system and the fifth generation (5G) communication system, the dual connection of the 5G communication system and the 4G communication system, or the dual connection of the 5G communication system and the 5G communication system, or the 5G communication system and the future communication system, etc., wherein the fifth generation communication system may also be referred to as the NR system. However, it should be understood that the method provided in the embodiment of the present application is not limited to application in the DC architecture, and it can also be applied to other system architectures, such as a single connection architecture.

[0038] In the DC architecture, a terminal device will simultaneously connect to two cell sets. One of the cell sets is called the master cell group (MCG), which includes at least one primary cell (PCell) and, optionally, at least one secondary cell (SCell). The other cell set to which the terminal device connects is called the secondary cell group (SCG), which includes at least one primary secondary cell (PSCell) and, optionally, at least one SCell. It should be noted that since all cells included in the MCG are usually deployed in one node, in many scenarios, the MCG can also be called the master node (MN); since all cells included in the SCG are usually deployed in one node, in many scenarios, the SCG can also be called the secondary node (SN). The dual-connection architecture of NR-DC is shown in Figure 2. The terminal device is connected to the MN and SN at the same time. The MN and the SN are connected through the Xn interface, and the MN is connected to the core network device through the NG interface. Optionally, the SN is also connected to the core network device through the NG interface.

[0039] The following describes a communication system applicable to the embodiment of the present application by taking the communication system 30 shown in FIG3 as an example.

[0040] Figure 3 is a schematic diagram of the architecture of a communication system 30 provided in an embodiment of the present application. As shown in Figure 3, communication system 30 may include network device 301, network device 302, network device 305, terminal device 303, and terminal device 304. Figure 3 is merely a schematic diagram and does not limit the applicable scenarios of the technical solutions provided in this application.

[0041] The network device in Figure 3, namely network device 301, network device 302 or network device 305, may be, for example, the network device 110 shown in Figure 1. The terminal device in Figure 3, namely terminal device 303 or terminal device 304, may be, for example, the terminal device 120 shown in Figure 1.

[0042] LTM

[0043] To further shorten the handover delay and ensure service continuity, the 3rd Generation Partnership Project (3GPP) supports LTM. For ease of understanding, the LTM process is first introduced with reference to FIG4.

[0044] As shown in FIG4 , the LTM process may include an LTM preparation phase, an LTM execution phase, and an LTM completion phase.

[0045] In the LTM preparation stage, the LTM may include steps S410 to S430.

[0046] In step S410, the terminal device reports a measurement result to the network device. The measurement result may be a layer 3 measurement result. The network device may then determine to initiate an LTM process based on the measurement result reported by the terminal device and trigger candidate cell preparation.

[0047] In step S420, the network device sends a radio resource control (RRC) message including the LTM configuration (or LTM candidate configuration) to the terminal device. For example, the network device may send an RRC reconfiguration message (RRCReconfiguration message) to the terminal device to indicate the LTM configuration.

[0048] In some embodiments, the LTM configuration sent by the network device to the terminal device may include LTM configurations corresponding to one or more candidate cells.

[0049] In some embodiments, the terminal device may also store the LTM configuration indicated by the network device.

[0050] In step S430, the terminal device sends a reconfiguration completion message (RRCReconfigurationComplete message) to the network device.

[0051] In some embodiments, referring to steps S440a and S440b, after the terminal device completes the LTM preparation phase, it can perform uplink / downlink synchronization with the candidate cell in advance to shorten the interruption delay during the handover process. This process can be understood as the early synchronization phase.

[0052] During the LTM execution phase, the LTM may include step S450 and step S460.

[0053] In step S450, the terminal device performs layer 1 measurement on each candidate cell and reports the layer 1 measurement result to the network device.

[0054] In some implementations, after receiving the layer 1 measurement result reported by the terminal device, the network device may determine the target cell based on the layer 1 measurement result.

[0055] In step S460, the network device sends a cell handover command to the terminal device to instruct the terminal device to handover to the target cell. For example, the network device may instruct the terminal device to handover to the target cell via a medium access control element (MAC CE).

[0056] In some implementations, after receiving the cell handover command, the terminal device may detach from the source cell (detach from the source cell) and apply the target configuration (ie, apply the configuration of the target cell).

[0057] In some embodiments, if the terminal device does not currently have a valid timing advance (TA) or transmission configuration indicator (TCI) status flag for the target cell, the terminal device may further perform step S470 during the LTM execution phase. In step S470, the terminal device initiates a random access procedure to the target cell.

[0058] During the LTM completion phase, the LTM may include step S480 .

[0059] In step S480, the terminal device indicates that the LTM is completed. For example, the terminal device may send an indication message indicating that the LTM is successfully completed to the target cell.

[0060] LTM configuration handling in different scenarios

[0061] The terminal device can execute the LTM process based on the LTM configuration sent by the network device. In some protocols (for example, 3GPP Release 18 (R18)), LTM supports continuous cell handover. This means that the terminal device can perform multiple rounds of handover based on the LTM configuration configured once by the network device, thereby reducing the overhead of transmitting the LTM configuration. In this case, the terminal device can handle the LTM configuration differently based on different scenarios.

[0062] The following table 1 provides an example of how LTM configurations are handled in different scenarios.

[0063] Table 1

[0064] It should be understood that RRC release may refer to the disconnection of the RRC connection between the terminal device and the network device. For example, RRC release may refer to the terminal device being in an RRC idle state or an RRC inactive state.

[0065] It should be understood that in the scenario of RRC connection re-establishment, the purpose of the terminal device retaining the MCG LTM configuration is to enable rapid LTM recovery.

[0066] It should be noted that in Table 1, the PCell / PSCell change / addition can be a PCell / PSCell change / addition based on layer 3, or a conditional PCell / PSCell change / addition.

[0067] It should also be noted that the current LTM (see MCG LTM and / or SCG LTM in Table 1) only supports intra-CU LTM. In other words, the current LTM configuration processing method is all for intra-CU LTM.

[0068] Therefore, if the scenarios supported by LTM are expanded in the future, for example, LTM can support inter-CU LTM, conditional LTM, etc., the existing LTM configuration processing method will no longer be applicable.

[0069] In response to the above problems, the embodiments of the present application provide a method, terminal device, and network device for wireless communication, which are conducive to ensuring that the processing method of LTM configuration is applicable to various scenarios. For example, it can be applicable to existing LTM scenarios and extended LTM scenarios (such as inter-CU LTM, conditional LTM, etc.), with a wider range of adaptability.

[0070] The system architectures to which the embodiments of the present application are applicable may include multiple types. For example, the embodiments of the present application may be applied to a dual-connection system architecture; or, the embodiments of the present application may be applied to a single-connection system architecture, etc.

[0071] The application scenarios of the embodiments of the present application may include various ones, which are not limited by the present application. For example, the embodiments of the present application may be applied to one or more of the following scenarios: LTM, RRC release, RRC connection re-establishment, SCG release, MCG / SCG radio link failure, PCell / PSCell change / addition, etc.

[0072] The embodiments of the present application are described below with reference to the accompanying drawings.

[0073] FIG5 is a flow chart of a method for wireless communication according to an embodiment of the present application. The method shown in FIG5 can be executed by a terminal device, such as the terminal device 120 shown in FIG1. ​​The method shown in FIG5 can include step S510, which is described below.

[0074] In step S510 , the terminal device performs a first operation for a first configuration.

[0075] In the embodiments of the present application, the first configuration may be used to configure the LTM. In other words, the first configuration may include the LTM configuration. In some embodiments, the first configuration may also be understood as the LTM configuration.

[0076] In some embodiments, the first configuration may include an MCG-associated configuration and / or an SCG-associated configuration. For example, the first configuration may include one or more MCG-associated configurations. Alternatively, the first configuration may include one or more SCG-associated configurations. Alternatively, the first configuration may include one or more MCG-associated configurations and one or more SCG-associated configurations.

[0077] In some embodiments, the configuration of the MCG association includes the configuration of the candidate MCG association. In some embodiments, the configuration of the SCG association includes the configuration of the candidate SCG association. That is, in some embodiments, the first configuration may include the configuration of the candidate MCG association and / or the configuration of the candidate SCG association.

[0078] In some embodiments, the MCG-associated configuration may include an MCG LTM configuration, and the SCG-associated configuration may include an SCG LTM configuration. That is, in some embodiments, the first configuration may include an MCG LTM configuration and / or an SCG LTM configuration.

[0079] The embodiments of the present application do not limit the configuration content included in the first configuration. Exemplarily, the first configuration can be used to indicate one or more of the following information: relevant information about candidate cells, relevant information about measurements that the terminal device needs to perform, relevant information about the terminal device performing early synchronization, and relevant information about the terminal device performing handover.

[0080] In some embodiments, the first configuration may include one or more of the following: configuration of one or more candidate cells (or, one or more candidate cell configurations), measurement configuration associated with one or more candidate cells, early synchronization configuration associated with one or more candidate cells, measurement reporting condition configuration associated with one or more candidate cells, switching condition configuration associated with one or more candidate cells, etc.

[0081] In some embodiments, the first configuration may include one or more of the following: configurations of one or more candidate cell groups (or, one or more candidate cell group configurations), measurement configurations associated with one or more candidate cell groups, early synchronization configurations associated with one or more candidate cell groups, measurement reporting condition configurations associated with one or more candidate cell groups, and handover condition configurations associated with one or more candidate cell groups. Each of the one or more candidate cell groups may include one or more candidate cells.

[0082] In some embodiments, the first configuration may include one or more CU-associated configurations. For example, the first configuration may include a CU-associated configuration, in which case the CU-associated configuration is equivalent to the first configuration. Alternatively, the first configuration may include multiple CU-associated configurations, in which case the CU-associated configuration refers to a partial configuration in the first configuration. Alternatively, the first configuration may include a CU-associated measurement configuration and / or multiple CU-associated candidate cell configurations, or the first configuration may include multiple CU-associated measurement configurations and multiple CU-associated candidate cell configurations.

[0083] In some embodiments, the configurations of one or more candidate cells included in the first configuration may belong to a configuration associated with the same CU. In some embodiments, the configurations of one or more candidate cells included in the first configuration may belong to configurations associated with different CUs. Taking the configuration in which the first configuration includes 8 candidate cells (candidate cell 1 to candidate cell 8) as an example, the configurations of these 8 candidate cells may belong to a configuration associated with the same CU; or the configurations of candidate cell 1 to candidate cell 5 may belong to a configuration associated with the same CU, and candidate cell 6 to candidate cell 8 may belong to a configuration associated with another CU; or, the 8 candidate cells may respectively belong to configurations associated with different CUs, etc.

[0084] In some embodiments, the configuration of one or more candidate cell groups included in the first configuration may belong to a configuration associated with the same CU. In some embodiments, the configuration of one or more candidate cell groups included in the first configuration may belong to a configuration associated with different CUs. Taking the configuration in which the first configuration includes 8 candidate cell groups (candidate cell group 1 to candidate cell group 8) as an example, the configuration of these 8 candidate cell groups may belong to a configuration associated with the same CU; or the configuration of candidate cell group 1 to candidate cell group 5 may belong to a configuration associated with the same CU, and candidate cell group 6 to candidate cell group 8 may belong to a configuration associated with another CU; or, the 8 candidate cell groups may respectively belong to configurations associated with different CUs, etc.

[0085] In some embodiments, different CUs / candidate cell groups may be associated with different first configurations. For example, CU1 / candidate cell group 1 is associated with candidate cells 1 to 5, and CU1 / candidate cell group 1 may be associated with one first configuration; CU2 / candidate cell group 2 is associated with candidate cells 2 to 6, and CU2 / candidate cell group 2 may be associated with another first configuration. In some implementations, after the terminal device switches the CU / candidate cell group, LTM (including measurement, reporting, switching, etc.) may be performed based on the first configuration associated with the target CU / candidate cell group (or, the new CU / candidate cell group).

[0086] The relevant information of the candidate cell may include, for example, identification information of the candidate cell, physical layer configuration parameters of the candidate cell (such as frequency, code rate, power, etc.), etc.

[0087] In some embodiments, the relevant information of the candidate cells may be indicated by the configuration of one or more candidate cells or the configuration of one or more candidate cell groups.

[0088] The relevant information of the measurements that the terminal device needs to perform may include, for example, which frequency points the terminal device needs to measure, the reference signal used by the terminal device when measuring, the wireless resources used by the terminal device for measurement reporting (such as time-frequency resources, etc.), and the conditions for terminal device measurement reporting (such as periodic reporting, event-triggered reporting, etc.).

[0089] In some embodiments, the relevant information of the measurements that the terminal device needs to perform can be indicated by one or more of the following: measurement configurations associated with one or more candidate cells, measurement configurations associated with one or more candidate cell groups, measurement reporting condition configurations associated with one or more candidate cells, and measurement reporting condition configurations associated with one or more candidate cell groups.

[0090] In some embodiments, the measurement configuration associated with the candidate cell may include a reference signal configuration and / or a measurement reporting configuration. The reference signal configuration may be used to indicate the reference signal used by the terminal device for measurement, and the measurement reporting configuration may be used to indicate the radio resources used by the terminal device for measurement reporting.

[0091] The relevant information of the terminal device performing early synchronization may include, for example, whether the terminal device needs to perform early synchronization, information about the reference signal required for the terminal device to perform early synchronization, etc. It should be understood that the terminal device performing early synchronization means that the terminal device can perform uplink / downlink synchronization with the candidate cell in advance before receiving the LTM cell switching command. For details, please refer to the process of Figure 4.

[0092] In some embodiments, the relevant information for the terminal device to perform early synchronization can be indicated by, for example, early synchronization configurations associated with one or more candidate cells or early synchronization configurations associated with one or more candidate cell groups.

[0093] The relevant information for the terminal device to perform handover may include, for example, the handover conditions (or handover triggering conditions) associated with the candidate cell, the specific parameter settings of the handover (for example, the target cell configuration validity information, handover type, handover delay, etc.), etc.

[0094] In some embodiments, the relevant information for the terminal device to perform handover can be indicated by, for example, a handover condition configuration associated with one or more candidate cells or a handover condition configuration associated with one or more candidate cell groups.

[0095] In an embodiment of the present application, the terminal device can perform a first operation for the first configuration, and the first operation may include one or more of the following: releasing part or all of the configuration in the first configuration, retaining part or all of the configuration in the first configuration, and suspending the use of part or all of the configuration in the first configuration.

[0096] Taking the first configuration including the MCG-associated configuration and / or the SCG-associated configuration as an example, releasing part or all of the configurations in the first configuration may include one or more of the following: releasing the MCG-associated configuration (also known as releasing all MCG-associated configurations), releasing part of the configuration in the MCG-associated configuration, releasing the SCG-associated configuration (also known as releasing all SCG-associated configurations), and releasing part of the configuration in the SCG-associated configuration.

[0097] The embodiments of the present application do not limit the release of part of the configuration associated with the MCG. For example, the release of part of the configuration associated with the MCG may include one or more of the following: releasing part of the configuration or all of the configuration associated with the source MCG, releasing part of the configuration or all of the configuration associated with the target MCG, releasing part of the configuration or all of the configuration associated with the service MCG, etc.

[0098] The embodiments of the present application do not limit the release of part of the configuration in the SCG-associated configuration. For example, the release of part of the configuration in the SCG-associated configuration may include one or more of the following: releasing part of the configuration or all of the configuration in the source SCG-associated configuration, releasing part of the configuration or all of the configuration in the target SCG-associated configuration, and releasing part of the configuration or all of the configuration in the service SCG-associated configuration.

[0099] Taking the first configuration including the MCG-associated configuration and / or the SCG-associated configuration as an example, retaining part or all of the configuration in the first configuration may include one or more of the following: retaining the MCG-associated configuration (also known as retaining all the MCG-associated configurations), retaining part of the configuration in the MCG-associated configuration, retaining the SCG-associated configuration (also known as retaining all the SCG-associated configurations), and retaining part of the configuration in the SCG-associated configuration.

[0100] The embodiments of the present application do not limit the retention of part of the configuration in the MCG-associated configuration. For example, the retention of part of the configuration in the MCG-associated configuration may include one or more of the following: retaining part of the configuration or all of the configuration in the source MCG-associated configuration, retaining part of the configuration or all of the configuration in the target MCG-associated configuration, retaining part of the configuration or all of the configuration in the service MCG-associated configuration, etc.

[0101] The embodiments of the present application do not limit the retention of part of the configuration in the SCG-associated configuration. For example, the retention of part of the configuration in the SCG-associated configuration may include one or more of the following: retaining part of the configuration or all of the configuration in the source SCG-associated configuration, retaining part of the configuration or all of the configuration in the target SCG-associated configuration, retaining part of the configuration or all of the configuration in the service SCG-associated configuration, etc.

[0102] It should be noted that the retention of the first configuration mentioned in the embodiment of the present application (such as retaining part of the configuration in the first configuration, retaining all the configuration in the first configuration) can be understood as that the terminal device may not perform any processing on the first configuration, or in other words, the terminal device will not process the first configuration autonomously. Afterwards, the terminal device can operate the first configuration according to the indication information of the network device (such as release, retention, update, etc.). For example, the terminal device will not process the first configuration autonomously, and then the terminal device can operate the first configuration according to the explicit indication information of the network device or the RRC reconfiguration message. The retention of the first configuration mentioned later (such as retaining the configuration associated with one or more MCGs, retaining the configuration associated with one or more SCGs, retaining the configuration associated with one or more SCGs associated with the target MCG, etc.) all have the same meaning and will not be repeated later for the sake of brevity.

[0103] Taking the first configuration including the MCG-associated configuration and / or the SCG-associated configuration as an example, suspending the use of part or all of the configurations in the first configuration may include one or more of the following: suspending the use of the MCG-associated configuration (also known as suspending the use of all MCG-associated configurations), suspending the use of part of the configuration in the MCG-associated configuration, suspending the use of the SCG-associated configuration (also known as suspending the use of all SCG-associated configurations), and suspending the use of part of the SCG-associated configuration.

[0104] The embodiments of the present application do not limit the suspension of the use of part of the configuration in the MCG-associated configuration. For example, the suspension of the use of part of the configuration in the MCG-associated configuration may include one or more of the following: suspending the use of part or all of the configuration in the source MCG-associated configuration, suspending the use of part or all of the configuration in the target MCG-associated configuration, suspending the use of part or all of the configuration in the service MCG-associated configuration, etc.

[0105] The embodiments of the present application do not limit the suspension of the use of part of the configuration in the SCG-associated configuration. For example, the suspension of the use of part of the configuration in the SCG-associated configuration may include one or more of the following: suspending the use of part or all of the configuration in the source SCG-associated configuration, suspending the use of part or all of the configuration in the target SCG-associated configuration, suspending the use of part or all of the configuration in the service SCG-associated configuration, etc.

[0106] In some embodiments, suspending the use of the first configuration may include: retaining the first configuration but not performing measurements and / or measurement reporting related to the first configuration. Taking the case where the terminal device suspends the use of the first configuration as an example, suspending the use of the first configuration by the terminal device may mean that the terminal device retains the first configuration but does not perform measurements and / or measurement reporting related to the first configuration.

[0107] In some embodiments, suspending the use of the first configuration may include: suspending the use of all configurations in the first configuration and / or suspending the use of part of the first configuration.

[0108] In some embodiments, the first configuration is sent by the network device to the terminal device. For example, referring again to Figure 5 , in some embodiments, the method shown in Figure 5 may further include step S505, in which the terminal device receives the first configuration sent by the network device. The terminal device may then perform a first operation on the first configuration.

[0109] In an embodiment of the present application, the terminal device may perform one or more of the following operations on the first configuration (or, the first operation may include one or more of the following): releasing part or all of the configurations in the first configuration, retaining part or all of the configurations in the first configuration, and suspending the use of part or all of the configurations in the first configuration. These operations are conducive to improving the handover success rate, reducing signaling overhead, or shortening the handover delay. In addition, the solution provided in the embodiment of the present application is applicable to various scenarios and is compatible with existing LTM scenarios and extended LTM scenarios, with a wider range of applicability.

[0110] Taking the case where the terminal device releases part or all of the configurations in the first configuration as an example, after the terminal device releases part or all of the configurations in the first configuration, the network device can subsequently reconfigure the first configuration for the terminal device, and the updated first configuration will be more in line with the current environment of the terminal device, which is conducive to improving the switching success rate. Taking the case where the terminal device retains part or all of the configurations in the first configuration as an example, after the terminal device retains part or all of the configurations in the first configuration, the terminal device can subsequently perform mobility operations based on the first configuration, which is conducive to reducing the signaling overhead generated by the network device reconfiguring the first configuration and shortening the switching delay. However, it should be understood that after the terminal device retains the first configuration, it is necessary to continuously perform measurements and / or measurement reporting related to the first configuration, resulting in a heavy burden on the terminal device. Therefore, in an embodiment of the present application, the terminal device can suspend the use of part or all of the configurations in the first configuration. In this way, the terminal device can subsequently perform mobility operations based on the first configuration, which is conducive to reducing the signaling overhead generated by the network device reconfiguring the first configuration and shortening the switching delay, while also reducing the burden on the terminal device caused by continuously performing measurements and / or measurement reporting.

[0111] In some embodiments, the first operation is triggered based on a first event, or the first operation is triggered based on a first condition. The first event or first condition may be related to the mobility of the terminal device, that is, the first event or first condition is an event or condition associated with the mobility of the terminal device. In other words, the first operation may be triggered based on a mobility event.

[0112] The first event (or first condition) is introduced below.

[0113] The embodiments of the present application do not specifically limit the first event. For example, the first event may be related to one or more of the following: cell handover, radio link failure, RRC connection re-establishment, RRC release, SCG release, PCell change, PSCell change / addition, etc. For example, the first event may be related to cell handover. Alternatively, the first event may be related to MCG / SCG radio link failure. Alternatively, the first event may be related to RRC release, etc.

[0114] In some embodiments, the first event being related to cell handover can be understood as the first event being related to LTM, or in other words, the first event being related to a first type of handover, where the first type of handover includes LTM-related handover.

[0115] The embodiments of the present application do not specifically limit the first type of handover. Exemplarily, the first type of handover may include one or more of the following: intra-CU LTM, inter-CU LTM, intra-DU LTM, inter-DU LTM, and conditional LTM. In other words, the first event being related to LTM may mean that the first event is related to one or more of the following: intra-CU LTM, inter-CU LTM, intra-DU LTM, inter-DU LTM, and conditional LTM.

[0116] In some embodiments, the LTM may include an MCG LTM and / or an SCG LTM. That is, the first type of switching may include one or more of the following (or the first event may be related to one or more of the following): intra-CU MCG LTM, intra-CU SCG LTM, inter-CU MCG LTM, inter-CU SCG LTM, intra-DU MCG LTM, intra-DU SCG LTM, inter-DU MCG LTM, inter-DU SCG LTM, and conditional LTM.

[0117] When the system architecture applicable to the present application includes a dual-connection system architecture, the intra-CU MCG LTM may be equivalent to or replaced by the intra-MN MCG LTM, the intra-CU SCG LTM may be equivalent to or replaced by the intra-SN SCG LTM, the inter-CU MCG LTM may be equivalent to or replaced by the inter-MN MCG LTM, and the inter-CU SCG LTM may be equivalent to or replaced by the inter-SN SCG LTM.

[0118] In some embodiments, the MCG LTM may include MCG LTM with SCG change and / or MCG LTM without SCG change. That is, in the embodiments of the present application, when the terminal device executes the MCG LTM process, the SCG may change with the MCG or not, and the embodiments of the present application are not limited to this.

[0119] In some embodiments, when the first event is related to a first type of handover, the first event may be related to triggering the first type of handover and / or completing the first type of handover. Exemplarily, the first event may include one or more of the following: the terminal device triggering the first type of handover, the terminal device successfully completing the first type of handover, and the terminal device receiving a handover command for the first type of handover. That is, when the first event is related to the first type of handover, the terminal device may operate the first configuration when the first type of handover is triggered; or the terminal device may operate the first configuration when the first type of handover is successfully completed; or the terminal device may operate the first configuration when the handover command for the first type of handover is received, etc.

[0120] It should be understood that in some embodiments, the terminal device triggering the first type of handover and the terminal device receiving the handover command for the first type of handover can both be understood as triggering methods for the first type of handover. Taking LTM as an example, LTM can include an LTM process triggered by a network device based on a handover command and an LTM process triggered by a terminal device based on a condition. In the LTM process triggered by the network device based on a handover command, the terminal device can operate the first configuration upon receiving the handover command for the first type of handover. In the LTM process triggered by the terminal device based on a condition, the terminal device can operate the first configuration upon triggering the first type of handover.

[0121] In some embodiments, the terminal device may perform different operations on the first configuration based on different first events. That is, the terminal device may perform different operations on the first configuration when the first event is different. The following describes the operations performed by the terminal device on the first configuration based on different first events, in conjunction with Examples 1 to 3.

[0122] Example 1:

[0123] In embodiment 1, the first event is related to inter-CU MCG LTM and / or PCell change. For example, the first event is related to inter-CU MCG LTM and / or inter-CU PCell change.

[0124] As described above, the first configuration may include MCG-associated configuration and / or SCG-associated configuration. Based on Embodiments 1.1 and 1.2, the following describes how to handle MCG-associated configuration and SCG-associated configuration, respectively, when the first event is related to inter-CU MCG LTM and / or PCell change.

[0125] Example 1.1: The first configuration includes one or more MCG-associated configurations

[0126] In some embodiments, the terminal device may perform one or more of the following operations on the first configuration: retain one or more MCG-associated configurations, release the configuration associated with the CU to which the source MCG belongs, suspend the use of the configuration associated with the CU to which the source MCG belongs, and release the configuration associated with the target MCG.

[0127] In some embodiments, the terminal device may perform one of the above operations on the first configuration. For example, the terminal device may retain the configuration associated with one or more MCGs. Alternatively, the terminal device may release the configuration associated with the CU to which the source MCG belongs. Alternatively, the terminal device may suspend the use of the configuration associated with the CU to which the source MCG belongs, etc.

[0128] In some embodiments, the terminal device may perform multiple of the above operations on the first configuration. For example, the terminal device may release the configuration associated with the CU to which the source MCG belongs, and release the configuration associated with the target MCG. Alternatively, the terminal device may suspend the use of the configuration associated with the CU to which the source MCG belongs, and release the configuration associated with the target MCG, etc.

[0129] In some embodiments, the terminal device retaining the configuration associated with one or more MCGs may include that the terminal device retains the configuration associated with all MCGs in the first configuration. In some embodiments, the terminal device retaining the configuration associated with one or more MCGs may include that the terminal device retains the configuration associated with some MCGs in the first configuration.

[0130] In some embodiments, the terminal device retains (autonomously retains) one or more MCG-associated configurations in the first configuration, which is beneficial for saving signaling overhead and shortening switching delay.

[0131] In some embodiments, if the cell handover performed by the terminal device is a continuous cell handover, the terminal device may retain the configuration of one or more MCG associations in the first configuration.

[0132] In some embodiments, the terminal device retains one or more MCG-associated configurations in the first configuration, which can be understood as the terminal device not autonomously processing the one or more MCG-associated configurations. Afterwards, the terminal device can operate (such as release, retain, update, etc.) on the one or more MCG-associated configurations based on the indication information of the network device.

[0133] In some embodiments, when the first configuration does not support the terminal device to switch back to the CU that was previously accessed, the terminal device may release the configuration associated with the CU to which the source MCG belongs. That is, when the first configuration does not support the terminal device to switch back to the CU that was previously accessed, the first operation performed by the terminal device may include releasing the configuration associated with the CU to which the source MCG belongs. This is because, when the terminal device cannot switch back to the CU that was previously accessed, the configuration associated with the previous CU (i.e., the CU to which the source MCG belongs) is useless for the terminal device, so the terminal device may release the configuration associated with the CU to which the source MCG belongs to save resources.

[0134] In some embodiments, the terminal device releasing the configuration associated with the CU to which the source MCG belongs may mean that the terminal device releases all (all) configurations associated with the CU. In some embodiments, the terminal device releasing the configuration associated with the CU to which the source MCG belongs may mean that the terminal device releases part of the configuration associated with the CU.

[0135] In some embodiments, the terminal device releasing the configuration associated with the CU to which the source MCG belongs may include the terminal device releasing the configuration associated with the current CU.

[0136] In some embodiments, the terminal device releasing the configuration associated with the CU to which the source MCG belongs may include the terminal device releasing the configuration associated with one or more CUs to which the source MCG belongs.

[0137] As described above, the first configuration may include the configuration of the candidate cell, the measurement configuration associated with the candidate cell, the early synchronization configuration associated with the candidate cell, etc. That is to say, in some embodiments, the configuration associated with the CU to which the source MCG belongs, released by the terminal device, may include that the terminal device releases the measurement configuration associated with the CU to which the source MCG belongs. In some embodiments, after the terminal device releases the measurement configuration associated with the CU to which the source MCG belongs, the measurement configuration associated with the target CU (or the current serving CU) may be applied. In some embodiments, the reference signal configuration included in the measurement configuration associated with the target CU (or the current serving CU) may be associated with the candidate cell under the target CU (current serving CU) and / or the candidate cell associated with other candidate CUs.

[0138] In some embodiments, the terminal device suspending the use of the configuration associated with the CU to which the source MCG belongs is beneficial to saving resources of the terminal device, and is also beneficial to saving signaling overhead and shortening switching delay. For example, after the terminal device switches from the CU to which the source MCG belongs to other CUs, it is unlikely to switch back to the CU in a short period of time. If the configuration associated with the CU to which the source MCG belongs is retained, the terminal device will need to continue to perform measurements and / or measurement reporting, which takes up more resources and has little effect on performing measurements. In this case, the terminal device suspending the use of the configuration associated with the CU to which the source MCG belongs is beneficial to saving resources, and the network device does not need to resend the first configuration to the terminal device afterwards, which is beneficial to saving signaling overhead and shortening switching delay.

[0139] In some embodiments, in some embodiments, the terminal device suspending the use of the configuration associated with the CU to which the source MCG belongs may mean that the terminal device suspends the use of all (all) configurations associated with the CU. In some embodiments, the terminal device suspending the use of the configuration associated with the CU to which the source MCG belongs may mean that the terminal device suspends the use of part of the configuration associated with the CU.

[0140] In some embodiments, the terminal device suspending the use of the configuration associated with the CU to which the source MCG belongs may include the terminal device suspending the use of the configuration associated with the current CU.

[0141] In some embodiments, the terminal device suspending the use of a configuration associated with a CU to which a source MCG belongs may include the terminal device suspending the use of a configuration associated with one or more CUs to which the source MCG belongs.

[0142] In some embodiments, when the first configuration does not support the terminal device to switch back to the cell previously accessed, the terminal device may release the configuration associated with the target MCG. That is, when the first configuration does not support the terminal device to switch back to the cell previously accessed, the first operation performed by the terminal device may include releasing the configuration associated with the target MCG. Alternatively, when the first configuration does not support the terminal device to switch back to the cell previously accessed, the terminal device may release the configuration associated with the target cell. This is because, when the terminal device cannot switch back to the cell previously accessed, the configuration associated with the target MCG (or target cell) will be useless for the terminal device after successfully accessing the target cell. Therefore, the terminal device may release the configuration associated with the target MCG to save resources.

[0143] In some embodiments, the terminal device releasing the configuration associated with the CU to which the source MCG belongs may mean that the terminal device releases all (all) configurations associated with the CU. In some embodiments, the terminal device releasing the configuration associated with the CU to which the source MCG belongs may mean that the terminal device releases part of the configuration associated with the CU.

[0144] In some embodiments, after the terminal device switches to the target CU (new CU), the configuration associated with the target CU (or the first configuration associated with the target CU) may be applied. The configuration associated with the target CU includes at least one CU-associated configuration.

[0145] In some embodiments, the terminal device may release the configuration associated with the source CU and apply the configuration associated with the target CU.

[0146] In some embodiments, the terminal device may suspend the use of the configuration associated with the source CU and apply the configuration associated with the target CU.

[0147] Example 1.2: The first configuration includes one or more SCG-associated configurations

[0148] In some embodiments, the terminal device may perform one or more of the following operations on the first configuration: releasing configurations associated with one or more SCGs, releasing configurations associated with one or more SCGs associated with the source MCG, retaining configurations associated with one or more SCGs associated with the target MCG, and suspending the use of configurations associated with one or more SCGs.

[0149] In some embodiments, the terminal device releasing (or retaining) the configuration associated with one or more SCGs associated with the source MCG can also be understood as the terminal device releasing (or retaining) the configuration associated with one or more SCGs associated with the serving MCG. For example, before the terminal device switches to the target cell, the source MCG where the terminal device is located can also be called the serving MCG.

[0150] In some embodiments, the terminal device releasing (or retaining) the configuration associated with one or more SCGs associated with the target MCG can also be understood as the terminal device releasing (or retaining) the configuration associated with one or more SCGs associated with the serving MCG. For example, after the terminal device switches to the target cell, the target MCG to which the terminal device switches can also be called the serving MCG.

[0151] In some embodiments, the terminal device may perform one of the above operations on the first configuration. For example, the terminal device may release the configuration associated with one or more SCGs. Alternatively, the terminal device may release the configuration associated with one or more SCGs associated with the source MCG. Alternatively, the terminal device may retain the configuration associated with one or more SCGs associated with the target MCG, etc.

[0152] In some embodiments, the terminal device may perform multiple operations on the first configuration. For example, the terminal device may release configurations associated with one or more SCGs associated with the source MCG and retain configurations associated with one or more SCGs associated with the target MCG.

[0153] In some embodiments, the terminal device releasing (or retaining or suspending the use of) one or more SCG-associated configurations may include the terminal device releasing (or retaining or suspending the use of) all SCG-associated configurations in the first configuration. In some embodiments, the terminal device releasing (or retaining or suspending the use of) one or more SCG-associated configurations may include the terminal device releasing (or retaining or suspending the use of) configurations associated with some SCGs in the first configuration.

[0154] In some embodiments, the terminal device releases (autonomously releases) one or more SCG-associated configurations in the first configuration, which is beneficial for saving resources.

[0155] In some embodiments, the terminal device releasing one or more SCG-associated configurations in the first configuration can be understood as the terminal device not autonomously processing the one or more SCG-associated configurations. Afterwards, the terminal device can operate (such as release, retention, update, etc.) on the one or more SCG-associated configurations based on the instruction information of the network device.

[0156] In some embodiments, considering that the key on the MCG side will change when the terminal device executes inter-CU MCG LTM, the SCG security-related configuration generated by the MN may no longer be used. In this case, the terminal device can release the configuration associated with one or more SCGs associated with the source MCG.

[0157] In some embodiments, the terminal device releasing the configuration associated with one or more SCGs associated with the source MCG may mean that the terminal device can release the configuration associated with all SCGs associated with the source MCG. In some embodiments, the terminal device releasing the configuration associated with one or more SCGs associated with the source MCG may mean that the terminal device can release the configuration associated with some SCGs associated with the source MCG.

[0158] In some embodiments, considering that the key on the MCG side will change when the terminal device executes inter-CU MCG LTM, the SCG security-related configuration generated by the source MN may no longer be used, and the target MCG may be required to generate SCG security-related configuration. In this case, the terminal device can retain the configuration associated with one or more SCGs associated with the target MCG.

[0159] In some embodiments, the terminal device retains the configuration associated with one or more SCGs associated with the target MCG, which may mean that the terminal device can retain the configuration associated with all SCGs associated with the target MCG. In some embodiments, the terminal device retains the configuration associated with one or more SCGs associated with the target MCG, which may mean that the terminal device can retain the configuration associated with some SCGs associated with the target MCG.

[0160] In some embodiments, after the terminal device suspends the use of one or more SCG-associated configurations, the network device may instruct the terminal device to reconfigure the SCG-associated configurations or restore the previously suspended SCG-associated configurations.

[0161] It should be noted that Example 1.1 and Example 1.2 can be used alone or in combination, and this application does not limit this. For example, the terminal device can process the MCG-associated configuration based only on Example 1.1. Alternatively, the terminal device can process the SCG-associated configuration based only on Example 1.2. Alternatively, the terminal device can process the MCG-associated configuration and the SCG-associated configuration based on Example 1.1 and Example 1.2.

[0162] Example 2:

[0163] In Embodiment 2, the first event is related to one or more of the following: intra-CU LTM, inter-CU SCG LTM, PSCell addition / change, and intra-CU PCell change. For example, the first event may be related to intra-CU LTM (e.g., intra-CU MCG LTM, intra-CU SCG LTM). For another example, the first event may be related to PSCell addition / change (e.g., inter-CU PSCell addition / change, intra-CU PSCell addition / change).

[0164] In some embodiments, the terminal device may perform one or more of the following operations on the first configuration: retain one or more MCG-associated configurations, retain one or more SCG-associated configurations, suspend the use of one or more MCG-associated configurations, and suspend the use of one or more SCG-associated configurations.

[0165] In some embodiments, the terminal device may perform one of the above operations on the first configuration. For example, the terminal device may retain the configuration associated with one or more MCGs. Alternatively, the terminal device may retain the configuration associated with one or more SCGs. Alternatively, the terminal device may suspend the use of the configuration associated with one or more MCGs.

[0166] In some embodiments, the terminal device may perform multiple of the above operations on the first configuration. For example, the terminal device may retain the configuration associated with one or more MCGs and retain the configuration associated with one or more SCGs. Alternatively, the terminal device may retain the configuration associated with one or more MCGs and suspend the use of the configuration associated with one or more SCGs, etc.

[0167] In some embodiments, if the terminal device supports a scenario where the SCG does not change with the MCG LTM (MCG LTM without SCG change), the terminal device may retain the configuration associated with one or more SCGs when executing the intra-CU MCG LTM.

[0168] In some embodiments, if the terminal device supports a scenario where the SCG does not change with the MCG LTM (MCG LTM without SCG change), the terminal device may suspend the use of one or more SCG-associated configurations when executing the intra-CU MCG LTM.

[0169] In some embodiments, when the first event is related to one or more of the following: intra-CU LTM, inter-CU SCG LTM, PSCell addition / change, the terminal device may also release the MCG-associated configuration and / or release the SCG-associated configuration, and the embodiments of the present application are not limited to this. That is, the terminal device may perform one or more of the following operations on the first configuration: retain one or more MCG-associated configurations, retain one or more SCG-associated configurations, release one or more MCG-associated configurations, and release one or more SCG-associated configurations. For example, the terminal device may retain one or more MCG-associated configurations, but release one or more SCG-associated configurations. Alternatively, the terminal device may release one or more MCG-associated configurations, and release one or more SCG-associated configurations, etc.

[0170] In some embodiments, the terminal device retains one or more MCG-associated configurations, which can be understood as the terminal device can retain all MCG-associated configurations in the first configuration. In some embodiments, the terminal device retains one or more MCG-associated configurations, which can be understood as the terminal device can retain some MCG-associated configurations in the first configuration.

[0171] In some embodiments, the terminal device retaining one or more SCG-associated configurations can be understood as the terminal device retaining all SCG-associated configurations in the first configuration. In some embodiments, the terminal device retaining one or more SCG-associated configurations can be understood as the terminal device retaining some SCG-associated configurations in the first configuration.

[0172] In some embodiments, the terminal device suspending the use of one or more MCG-associated configurations can be understood as the terminal device suspending the use of all MCG-associated configurations in the first configuration. In some embodiments, the terminal device suspending the use of one or more MCG-associated configurations can be understood as the terminal device suspending the use of some MCG-associated configurations in the first configuration.

[0173] In some embodiments, the terminal device suspending the use of one or more SCG-associated configurations can be understood as the terminal device suspending the use of all SCG-associated configurations in the first configuration. In some embodiments, the terminal device suspending the use of one or more SCG-associated configurations can be understood as the terminal device suspending the use of some SCG-associated configurations in the first configuration.

[0174] As an example, the terminal device may retain the configurations associated with all MCGs and all SCGs in the first configuration. As another example, the terminal device may retain the configuration associated with the source MCG and the configurations associated with all SCGs associated with the source MCG in the first configuration. As yet another example, the terminal device may retain the configuration associated with the target MCG and the configurations associated with some SCGs associated with the target MCG in the first configuration, etc.

[0175] Example 3:

[0176] In embodiment 3, the first event is related to one or more of the following: RRC connection re-establishment, RRC release, MCG radio link failure, SCG radio link failure, and SCG release.

[0177] In some embodiments, a radio link failure in the MCG may also be understood as a radio link failure in the MN, a radio link failure in the serving cell, or a radio link failure in the primary cell.

[0178] In some embodiments, a radio link failure in the SCG may also be understood as a radio link failure in the SN or a radio link failure in the secondary cell.

[0179] In some embodiments, the terminal device may perform one or more of the following operations on the first configuration: releasing one or more SCG-associated configurations, releasing one or more MCG-associated configurations, retaining one or more MCG-associated configurations, retaining one or more SCG-associated configurations, suspending the use of one or more MCG-associated configurations, and suspending the use of one or more SCG-associated configurations.

[0180] In some embodiments, the terminal device may perform one of the above operations on the first configuration. For example, the terminal device may release one or more SCG-associated configurations. Alternatively, the terminal device may release one or more MCG-associated configurations. Alternatively, the terminal device may retain one or more MCG-associated configurations.

[0181] In some embodiments, the terminal device may perform multiple of the above operations on the first configuration. For example, the terminal device may release one or more SCG-associated configurations and release one or more MCG-associated configurations. Alternatively, the terminal device may retain one or more MCG-associated configurations and retain one or more SCG-associated configurations. Alternatively, the terminal device may release one or more SCG-associated configurations, retain one or more MCG-associated configurations, and so on. Alternatively, the terminal device may retain one or more MCG-associated configurations and suspend the use of one or more SCG-associated configurations. Alternatively, the terminal device may suspend the use of one or more MCG-associated configurations and release one or more SCG-associated configurations.

[0182] In some embodiments, the terminal device can release (or retain or suspend the use of) all MCG-associated configurations in the first configuration, or can release (or retain or suspend the use of) some MCG-associated configurations in the first configuration. In some embodiments, the terminal device can release (or retain or suspend the use of) all SCG-associated configurations in the first configuration, or can release (or retain or suspend the use of) some SCG-associated configurations in the first configuration. As an example, the terminal device can release the configuration associated with the source MCG, and release the configurations associated with all SCGs associated with the source MCG. As another example, the terminal device can release all MCG-associated configurations in the first configuration, and release the configurations associated with all SCGs.

[0183] In some embodiments, if the first configuration is used to configure a conditional LTM or the first configuration supports functionality added by an SCG, then the first operation may include retaining configurations associated with one or more SCGs. In some embodiments, the first configuration being used to configure a conditional LTM may also be understood as the LTM corresponding to the first configuration being a conditional LTM.

[0184] As an example, during the RRC connection re-establishment process or the RRC release process, if the first configuration can be used to configure conditional LTM, the terminal device can retain one or more SCG-associated configurations to quickly add the SCG.

[0185] As another example, during an SCG release process, the terminal device may retain one or more SCG-associated configurations if the first configuration supports functionality added by the SCG.

[0186] In some embodiments, if the cell to which the terminal device wants to resume / establish a connection happens to be an LTM candidate cell saved by the terminal device, the terminal device can directly apply the retained MCG-associated configuration to perform access. For example, in an RRC release scenario, the terminal device can retain one or more MCG-associated configurations. In this way, when the cell to which the UE wants to resume / establish a connection happens to be an LTM candidate cell saved by the terminal device, the terminal device can directly apply the retained MCG-associated configuration to perform access.

[0187] It should be noted that Examples 1 to 3 can be used alone or in combination, and the embodiments of the present application do not limit this. For example, if the terminal device retains part or all of the configurations in the first configuration under the scenario listed in any one of Examples 1 to 3, the terminal device can subsequently release or suspend the use of the previously retained configuration under the scenario listed in any one of Examples 1 to 3. Or, for example, if the terminal device suspends the use of part or all of the configurations in the first configuration under the scenario listed in any one of Examples 1 to 3, the terminal device can subsequently release or restore the previously suspended configuration under the scenario listed in any one of Examples 1 to 3.

[0188] As an example, when the terminal device executes the LTM process, it retains part or all of the configurations in the first configuration (such as the configuration associated with the CU to which the target MCG belongs). Then, when the terminal device subsequently executes the RRC connection re-establishment or RRC release process, it can release part or all of the configurations retained in the LTM process (such as the configuration associated with the CU to which the target MCG belongs).

[0189] As another example, when the terminal device executes the LTM process, it retains the configuration of one or more MCG associations. When the terminal device subsequently executes PSCell addition / change, it continues to retain the configuration of one or more MCG associations. When the terminal device executes SCG release, it can release the configuration of one or more MCG associations.

[0190] As another example, when the terminal device executes the LTM process, the use of one or more MCG-associated configurations is suspended. When the terminal device subsequently executes PSCell addition / change, the one or more MCG-associated configurations that were previously suspended can be released.

[0191] In some embodiments, before executing the first operation, the terminal device may first determine the first operation, that is, determine the processing method of the first configuration. The embodiments of the present application do not limit the manner in which the terminal device determines the first operation. For example, the first operation may be determined based on one or more of the following: protocol provisions, indication information sent by a network device, an event triggering the first operation, or pre-configured information. This is described below.

[0192] Method 1: Determine the first operation based on the protocol

[0193] In some embodiments, the protocol may specify a first operation of the terminal device for the first configuration, that is, the protocol may specify how the terminal device handles the first configuration. In this way, the terminal device may perform a corresponding operation on the first configuration according to the protocol provisions (or protocol agreement).

[0194] In some embodiments, the terminal device determining the first operation based on the protocol specification can be understood as an implementation method in which the terminal device autonomously processes the first configuration, that is, the terminal device can autonomously release / retain / suspend the use of the first configuration.

[0195] Method 2: Determine the first operation based on the instruction information sent by the network device

[0196] FIG6 is a flow chart of a method for wireless communication provided by another embodiment of the present application. The method shown in FIG6 is described from the perspective of interaction between a terminal device and a network device, which may be, for example, the terminal device 120 and the network device 110 shown in FIG1 . The method shown in FIG6 may include steps S610 and S620.

[0197] In step S610, the network device sends instruction information to the terminal device. The instruction information is used to indicate a first operation for the first configuration. In other words, the instruction information is used to indicate a processing method for the first configuration.

[0198] In some embodiments, the indication information may indicate one or more of the following operations: releasing some or all of the configurations in the first configuration, retaining some or all of the configurations in the first configuration, or suspending some or all of the configurations in the first configuration. For a detailed description of the above operations, please refer to the previous text and will not be repeated here for the sake of brevity.

[0199] In some embodiments, the indication information may be explicit indication information. That is, the network device may explicitly indicate the first operation for the first configuration. For example, the network device may instruct the terminal device to release / retain / suspend the use of the first configuration through certain bits.

[0200] The embodiments of the present application do not specifically limit the number of information bits occupied by the indication information. As an example, the network device may use one bit to instruct the terminal device to release / retain the first configuration. As another example, the network device may use two bits to instruct the terminal device to release / retain / suspend the use of the first configuration.

[0201] In some embodiments, the MCG-associated configuration and the SCG-associated configuration may be indicated by different bits. That is, one or more bits may be used to indicate a first operation for the MCG-associated configuration in the first configuration, while another or more bits may be used to indicate a first operation for the SCG-associated configuration in the first configuration.

[0202] In some embodiments, the MCG-associated configuration and the SCG-associated configuration may be indicated by a shared bit. For example, a certain bit may be used to simultaneously indicate the MCG-associated configuration and the SCG-associated configuration.

[0203] However, the embodiments of the present application do not limit the indication information to explicit indication information. For example, the indication information may also be implicit indication information. For example, when the terminal device receives a new RRC reconfiguration message, it may be considered that the first operation for the currently retained first configuration is to release the first configuration and retain the configuration in the new RRC reconfiguration message as the new first configuration.

[0204] The embodiment of the present application does not limit the carrying manner of the indication information. Exemplarily, the indication information may be carried in one or more of the following: a cell handover command, an RRC reconfiguration message, a first configuration, or a MAC CE.

[0205] As an example, the indication information may be carried in an LTM cell switching command.

[0206] As another example, the indication information may be carried in an RRC reconfiguration message.

[0207] As another example, the indication information can be carried in the first configuration. In this way, each time the terminal device switches to a new LTM candidate / target cell, it can determine the first operation of the first configuration corresponding to the LTM candidate cell set currently to be evaluated based on the indication information in the candidate / target cell configuration.

[0208] As another example, the indication information may be carried in a MAC CE. In some embodiments, the MAC CE may be a new MAC CE for indicating a first operation for the first configuration, or in other words, the MAC CE may be a new MAC CE for indicating a processing method for the first configuration. In some embodiments, the MAC CE may be a MAC CE dedicated to indicating the first operation for the first configuration.

[0209] In some embodiments, the MAC CE can be used to indicate the first operation corresponding to one or more candidate cells (or, the MAC CE can be used to indicate the first operation of the first configuration corresponding to one or more candidate cells), or in other words, the MAC CE can be used to indicate the processing method of the LTM configuration of one or more candidate cells. As an implementation method, assuming that the terminal device is configured with 8 candidate cells (candidate cell 1 to candidate cell 8), the MAC CE may include the first operation corresponding to the 8 candidate cells, such as retaining the first configuration of candidate cell 1 to candidate cell 5, releasing the first configuration of candidate cell 6 to candidate cell 8; for example, retaining the first configuration of candidate cell 1 to candidate cell 4, releasing the first configuration of candidate cell 5 and candidate cell 6, suspending the use of the first configuration of candidate cell 7 and candidate cell 8, etc.

[0210] In some embodiments, the MAC CE may also be used to indicate the resumption of the first configuration that was previously suspended. As an implementation, assuming that the terminal device is configured with eight candidate cells (candidate cell 1 to candidate cell 8), the MAC CE may include retaining the first configuration of candidate cells 1 to candidate cell 4, releasing the first configuration of candidate cells 5 and candidate cell 6, and resuming (resuming use of) the first configuration of candidate cells 7 and candidate cell 8, etc.

[0211] In some embodiments, when the MAC CE is used to indicate the first operations corresponding to multiple candidate cells, the first operations corresponding to the multiple candidate cells may be the same. For example, if the terminal device is configured with eight candidate cells (candidate cell 1 to candidate cell 8), the MAC CE may include the first operations corresponding to the eight candidate cells, such as retaining the first configurations of candidate cells 1 to candidate cells 8.

[0212] In some embodiments, when the MAC CE is used to indicate the first operations corresponding to multiple candidate cells, the first operations corresponding to the multiple candidate cells may be different (partially different or completely different). For example, if the terminal device is configured with 8 candidate cells (candidate cell 1 to candidate cell 8), the MAC CE may include the first operations corresponding to the 8 candidate cells, such as retaining the first configuration of candidate cells 1 to candidate cell 5 and releasing the first configuration of candidate cells 6 to candidate cell 8.

[0213] In step S620, the terminal device performs a first operation on the first configuration. For example, the terminal device performs the first operation on the first configuration based on the instruction information sent by the network device.

[0214] For other introductions to step S620, please refer to the previous introduction to step S510, which will not be repeated here for the sake of brevity.

[0215] Method 3: Determine the first action based on the event that triggers the first action

[0216] The embodiments of the present application do not specifically limit the event that triggers the first operation. Exemplarily, the event that triggers the first operation may be an event related to the mobility of the terminal device, or in other words, the event that triggers the first operation may be a mobility event. For example, the event that triggers the first operation may include one or more of the following: inter-CU LTM, intra-CU LTM, inter-DU LTM, intra-DU LTM, PCell change, PSCell change / addition, RRC connection re-establishment, RRC release, MCG radio link failure, SCG radio link failure, SCG release, etc.

[0217] For example, if the event triggering the first operation is RRC connection re-establishment, MCG radio link failure, or SCG radio link failure, the terminal device may release the first configuration (e.g., release part or all of the configurations in the first configuration). For another example, if the event triggering the first operation is a PCell change, the terminal device may retain the first configuration. In some embodiments, after retaining the first configuration, the terminal device may wait for the network device to subsequently instruct the first operation on the first configuration.

[0218] Method 4: Determine the first operation based on pre-configured information

[0219] For example, the terminal device may determine the first operation based on pre-configuration information sent by the network device.

[0220] In some embodiments, the pre-configuration information may include a cell group identifier associated with the candidate cell. For example, the network device may associate a cell group identifier with one or more candidate cells, and then the terminal device may determine a first operation for the candidate cell based on the cell group identifier associated with the candidate cell. For example, the pre-configuration information may include a cell group identifier associated with a first candidate cell (which may be any candidate cell), and then the terminal device may determine a first operation corresponding to the first candidate cell based on the cell group identifier, such as retaining / releasing / suspending the use of the first configuration corresponding to the first candidate cell.

[0221] In some embodiments, the first operations corresponding to candidate cells having the same cell group identifier are the same. For example, after a terminal device switches to a target cell A, the terminal device may retain the first configuration corresponding to all candidate cells having the same cell group identifier associated with the target cell A, or the terminal device may release the first configuration corresponding to all candidate cells having the same cell group identifier associated with the target cell A, etc.

[0222] In some embodiments, the terminal device may determine the handover type of the terminal device based on the cell group identifier, and further determine the first operation for the first configuration based on the handover type. For example, the terminal device may determine whether inter-CU LTM or intra-CU LTM is currently being executed based on the cell group identifier, thereby determining whether to retain / release / suspend use of the first configuration (such as part or all of the configurations in the first configuration).

[0223] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 6 , and the device embodiment of the present application is described in detail below in conjunction with Figures 7 to 9 . It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, and therefore, for portions not described in detail, reference can be made to the above method embodiment.

[0224] FIG7 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. The terminal device shown in FIG7 may include an execution module 710. Execution module 710 may be configured to perform a first operation on a first configuration, where the first configuration is used to configure the LTM, and the first operation may include one or more of the following: releasing part or all of the configurations in the first configuration; retaining part or all of the configurations in the first configuration; or suspending the use of part or all of the configurations in the first configuration.

[0225] Optionally, the first operation is triggered based on a first event, and the first event is related to the mobility of the terminal device.

[0226] Optionally, the first event includes one or more of the following: the terminal device triggers a first type of switching; the terminal device successfully completes the first type of switching; the terminal device receives a switching command for the first type of switching; wherein the first type of switching includes LTM-related switching.

[0227] Optionally, the first type of switching includes one or more of the following: inter-CU LTM, intra-CU LTM, inter-DU LTM, intra-DU LTM, conditional LTM; wherein LTM includes MCG LTM and / or SCG LTM.

[0228] Optionally, the first event is related to the inter-CU main cell group MCG LTM or the main cell change, the first configuration includes one or more MCG-associated configurations, and the first operation includes one or more of the following: retaining the one or more MCG-associated configurations; releasing the CU-associated configuration to which the source MCG belongs; suspending the use of the CU-associated configuration to which the source MCG belongs; releasing the target MCG-associated configuration.

[0229] Optionally, the first configuration does not support the terminal device switching back to the CU previously accessed, and the first operation includes releasing the configuration associated with the CU to which the source MCG belongs.

[0230] Optionally, the first configuration does not support the terminal device switching back to the cell previously accessed, and the first operation includes releasing the configuration associated with the target MCG.

[0231] Optionally, the first event is related to inter-CU MCG LTM or a primary cell change, the first configuration includes configurations associated with one or more secondary cell groups SCG, and the first operation includes one or more of the following: releasing the configurations associated with the one or more SCGs; releasing the configurations associated with one or more SCGs associated with the source MCG; retaining the configurations associated with one or more SCGs associated with the target MCG; suspending the use of the configurations associated with the one or more SCGs.

[0232] Optionally, the first event is related to one or more of the following: intra-CU LTM, inter-CU SCG LTM, primary and secondary cell addition / change; the first configuration includes one or more MCG-associated configurations and / or one or more SCG-associated configurations, and the first operation includes one or more of the following: retaining the one or more MCG-associated configurations; retaining the one or more SCG-associated configurations; suspending the use of the one or more MCG-associated configurations; suspending the use of the one or more SCG-associated configurations.

[0233] Optionally, the first event is related to one or more of the following: RRC connection re-establishment, RRC release, MCG radio link failure, SCG radio link failure, SCG release; the first configuration includes one or more MCG-associated configurations and / or one or more SCG-associated configurations, and the first operation includes one or more of the following: releasing the one or more SCG-associated configurations; releasing the one or more MCG-associated configurations; retaining the one or more MCG-associated configurations; retaining the one or more SCG-associated configurations; suspending the use of the one or more MCG-associated configurations; suspending the use of the one or more SCG-associated configurations.

[0234] Optionally, the first configuration is used to configure conditional LTM or the first configuration supports the function added by SCG, and the first operation includes retaining the configuration associated with one or more SCGs.

[0235] Optionally, the execution of the first operation is determined based on one or more of the following: protocol provisions; indication information sent by a network device; an event that triggers the first operation; and pre-configuration information.

[0236] Optionally, the indication information is carried in one or more of the following: a cell switching command; an RRC reconfiguration message; the first configuration; or a MAC CE.

[0237] Optionally, the MAC CE is used to indicate first operations corresponding to multiple candidate cells, and the first operations corresponding to the multiple candidate cells are the same or different.

[0238] Optionally, the pre-configuration information includes a cell group identifier associated with the first candidate cell, and the cell group identifier is used to determine a first operation corresponding to the first candidate cell.

[0239] Optionally, the first configuration includes one or more of the following: configuration of one or more candidate cells; measurement configuration associated with the one or more candidate cells; early synchronization configuration associated with the one or more candidate cells; measurement reporting condition configuration associated with the one or more candidate cells; and switching condition configuration associated with the one or more candidate cells.

[0240] Optionally, the terminal device suspending use of the first configuration includes: the terminal device retaining the first configuration but not performing measurements and / or measurement reporting related to the first configuration.

[0241] Optionally, the execution module 710 may be a processor 910. The terminal device 700 may further include a transceiver 930 and a memory 920, as specifically shown in FIG9 .

[0242] FIG8 is a schematic diagram of the structure of a network device provided in an embodiment of the present application. The network device 800 shown in FIG8 may include a sending module 810. The sending module 810 may be configured to send an instruction message to a terminal device, wherein the instruction message is configured to indicate a first operation for a first configuration, wherein the first configuration is configured to configure LTM, wherein the first operation includes one or more of the following: releasing part or all of the configurations in the first configuration; retaining part or all of the configurations in the first configuration; or suspending the use of part or all of the configurations in the first configuration.

[0243] Optionally, the first operation is triggered based on a first event, and the first event is related to the mobility of the terminal device.

[0244] Optionally, the first event includes one or more of the following: the terminal device triggers a first type of switching; the terminal device successfully completes the first type of switching; the terminal device receives a switching command for the first type of switching; wherein the first type of switching includes LTM-related switching.

[0245] Optionally, the first type of switching includes one or more of the following: inter-CU LTM, intra-CU LTM, inter-DU LTM, intra-DU LTM, conditional LTM; wherein LTM includes MCG LTM and / or SCG LTM.

[0246] Optionally, the first event is related to the inter-CU main cell group MCG LTM or the main cell change, the first configuration includes one or more MCG-associated configurations, and the first operation includes one or more of the following: retaining the one or more MCG-associated configurations; releasing the CU-associated configuration to which the source MCG belongs; suspending the use of the CU-associated configuration to which the source MCG belongs; releasing the target MCG-associated configuration.

[0247] Optionally, the first configuration does not support the terminal device switching back to the CU previously accessed, and the first operation includes releasing the configuration associated with the CU to which the source MCG belongs.

[0248] Optionally, the first configuration does not support the terminal device switching back to the cell previously accessed, and the first operation includes releasing the configuration associated with the target MCG.

[0249] Optionally, the first event is related to inter-CU MCG LTM or a primary cell change, the first configuration includes configurations associated with one or more secondary cell groups SCG, and the first operation includes one or more of the following: releasing the configurations associated with the one or more SCGs; releasing the configurations associated with one or more SCGs associated with the source MCG; retaining the configurations associated with one or more SCGs associated with the target MCG; suspending the use of the configurations associated with the one or more SCGs.

[0250] Optionally, the first event is related to one or more of the following: intra-CU LTM, inter-CU SCG LTM, primary and secondary cell addition / change; the first configuration includes one or more MCG-associated configurations and / or one or more SCG-associated configurations, and the first operation includes one or more of the following: retaining the one or more MCG-associated configurations; retaining the one or more SCG-associated configurations; suspending the use of the one or more MCG-associated configurations; suspending the use of the one or more SCG-associated configurations.

[0251] Optionally, the first event is related to one or more of the following: RRC connection re-establishment, RRC release, MCG radio link failure, SCG radio link failure, SCG release; the first configuration includes one or more MCG-associated configurations and / or one or more SCG-associated configurations, and the first operation includes one or more of the following: releasing the one or more SCG-associated configurations; releasing the one or more MCG-associated configurations; retaining the one or more MCG-associated configurations; retaining the one or more SCG-associated configurations; suspending the use of the one or more MCG-associated configurations; suspending the use of the one or more SCG-associated configurations.

[0252] Optionally, the first configuration is used to configure conditional LTM or the first configuration supports the function added by SCG, and the first operation includes retaining the configuration associated with one or more SCGs.

[0253] Optionally, the indication information is carried in one or more of the following: a cell switching command; an RRC reconfiguration message; the first configuration; or a MAC CE.

[0254] Optionally, the MAC CE is used to indicate first operations corresponding to multiple candidate cells, and the first operations corresponding to the multiple candidate cells are the same or different.

[0255] Optionally, the first configuration includes one or more of the following: configuration of one or more candidate cells; measurement configuration associated with the one or more candidate cells; early synchronization configuration associated with the one or more candidate cells; measurement reporting condition configuration associated with the one or more candidate cells; and switching condition configuration associated with the one or more candidate cells.

[0256] Optionally, the suspending use of the first configuration includes: retaining the first configuration, but not performing measurement and / or measurement reporting related to the first configuration.

[0257] Optionally, the sending module 810 may be a transceiver 930. The network device 800 may further include a processor 910 and a memory 920, as specifically shown in FIG9 .

[0258] Figure 9 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 9 indicate that the unit or module is optional. The device 900 may be used to implement the method described in the above method embodiment. The device 900 may be a chip, a terminal device, or a network device.

[0259] The device 900 may include one or more processors 910. The processor 910 may support the device 900 to implement the method described in the method embodiment above. The processor 910 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0260] The apparatus 900 may further include one or more memories 920. The memories 920 store programs that can be executed by the processor 910, causing the processor 910 to perform the methods described in the above method embodiments. The memories 920 may be independent of the processor 910 or integrated into the processor 910.

[0261] The apparatus 900 may further include a transceiver 930. The processor 910 may communicate with other devices or chips via the transceiver 930. For example, the processor 910 may transmit and receive data with other devices or chips via the transceiver 930.

[0262] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0263] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal device or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0264] The present application also provides a computer program that can be applied to a terminal device or network device provided in the present application, and enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0265] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0266] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0267] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0268] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0269] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0270] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0271] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0272] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0273] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0274] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0275] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0276] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0277] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0278] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for wireless communication, characterized in that include: The terminal device performs a first operation for a first configuration, where the first configuration is used to configure layer 1 / layer 2 triggered mobility LTM, and the first operation includes one or more of the following: releasing part or all of the first configuration; retaining part or all of the first configuration; Part or all of the first configurations are suspended.

2. The method according to claim 1, characterized in that The first operation is triggered based on a first event, and the first event is related to the mobility of the terminal device.

3. The method according to claim 2, characterized in that The first event includes one or more of the following: The terminal device triggers a first type of handover; The terminal device successfully completes the first type of handover; The terminal device receives a handover command of a first type of handover; The first type of handover includes LTM-related handover.

4. The method according to claim 3, characterized in that The first type of handover includes one or more of the following: inter-CU LTM between central units, intra-CU LTM within a central unit, inter-DU LTM between distributed nodes, intra-DU LTM within a distributed node, and conditional LTM; Wherein, LTM includes MCG LTM and / or SCG LTM.

5. The method according to any one of claims 2 to 4, characterized in that The first event is related to an inter-CU primary cell group (MCG) LTM or a primary cell change, the first configuration includes one or more MCG-associated configurations, and the first operation includes one or more of the following: retaining the configuration of the one or more MCG associations; Release the configuration associated with the CU to which the source MCG belongs; Suspend the configuration associated with the CU to which the source MCG belongs; Release the configuration associated with the target MCG.

6. The method according to claim 5, characterized in that The first configuration does not support the terminal device switching back to the CU previously connected, and the first operation includes releasing the configuration associated with the CU to which the source MCG belongs.

7. The method according to claim 5 or 6, characterized in that The first configuration does not support the terminal device switching back to the cell previously accessed, and the first operation includes releasing the configuration associated with the target MCG.

8. The method according to any one of claims 2 to 7, characterized in that The first event is related to an inter-CU MCG LTM or a primary cell change, the first configuration includes configurations associated with one or more secondary cell groups (SCGs), and the first operation includes one or more of the following: Release the configuration associated with the one or more SCGs; Release the configuration associated with one or more SCGs associated with the source MCG; Preserve the configuration associated with one or more SCGs associated with the target MCG; The configuration associated with the one or more SCGs is suspended.

9. The method according to any one of claims 2 to 4, characterized in that The first event is related to one or more of the following: intra-CU LTM, inter-CU SCG LTM, addition / change of primary and secondary cells; The first configuration includes configurations associated with one or more MCGs and / or configurations associated with one or more SCGs, and the first operation includes one or more of the following: retaining the configuration of the one or more MCG associations; retaining the configuration of the one or more SCG associations; suspending the use of the configuration associated with the one or more MCGs; The configuration associated with the one or more SCGs is suspended.

10. The method according to any one of claims 2 to 4, characterized in that The first event is related to one or more of the following: radio resource control RRC connection re-establishment, RRC release, MCG radio link failure, SCG radio link failure, SCG release; The first configuration includes configurations associated with one or more MCGs and / or configurations associated with one or more SCGs, and the first operation includes one or more of the following: Release the configuration associated with the one or more SCGs; Release the configuration associated with the one or more MCGs; retaining the configuration of the one or more MCG associations; retaining the configuration of the one or more SCG associations; suspending the use of the configuration associated with the one or more MCGs; The configuration associated with the one or more SCGs is suspended.

11. The method according to claim 10, characterized in that The first configuration is used to configure conditional LTM or the first configuration supports the function added by SCG, and the first operation includes retaining the configuration associated with one or more SCGs.

12. The method according to any one of claims 1 to 11, characterized in that The execution of the first operation is determined based on one or more of the following: The agreement stipulates; Instruction information sent by network equipment; an event that triggers the first operation; Preconfiguration information.

13. The method according to claim 12, characterized in that The indication information is carried in one or more of the following: Cell switching command; RRC reconfiguration message; the first configuration; MAC CE.

14. The method according to claim 13, wherein: The MAC CE is used to indicate first operations corresponding to multiple candidate cells, and the first operations corresponding to the multiple candidate cells are the same or different.

15. The method according to any one of claims 12 to 14, characterized in that The pre-configuration information includes a cell group identifier associated with the first candidate cell, and the cell group identifier is used to determine a first operation corresponding to the first candidate cell.

16. The method according to any one of claims 1 to 15, characterized in that The first configuration includes one or more of the following: configuration of one or more candidate cells; a measurement configuration associated with the one or more candidate cells; an advance synchronization configuration associated with the one or more candidate cells; Measurement reporting condition configuration associated with the one or more candidate cells; The handover condition configuration associated with the one or more candidate cells.

17. The method according to any one of claims 1 to 16, characterized in that The terminal device suspending the use of the first configuration includes: the terminal device retaining the first configuration but not performing measurements and / or measurement reporting related to the first configuration.

18. A method for wireless communication, characterized in that: include: The network device sends indication information to the terminal device, where the indication information is used to indicate a first operation for a first configuration, where the first configuration is used to configure layer 1 / layer 2 triggered mobility LTM, where the first operation includes one or more of the following: releasing part or all of the first configuration; retaining part or all of the first configuration; Part or all of the first configurations are suspended.

19. The method according to claim 18, characterized in that The first operation is triggered based on a first event, and the first event is related to the mobility of the terminal device.

20. The method according to claim 19, characterized in that The first event includes one or more of the following: The terminal device triggers a first type of handover; The terminal device successfully completes the first type of handover; The terminal device receives a handover command of a first type of handover; The first type of handover includes LTM-related handover.

21. The method according to claim 20, characterized in that The first type of handover includes one or more of the following: inter-CU LTM between central units, intra-CU LTM within a central unit, inter-DU LTM between distributed nodes, intra-DU LTM within a distributed node, and conditional LTM; Wherein, LTM includes MCG LTM and / or SCG LTM.

22. The method according to any one of claims 19 to 21, characterized in that The first event is related to an inter-CU primary cell group (MCG) LTM or a primary cell change, the first configuration includes one or more MCG-associated configurations, and the first operation includes one or more of the following: retaining the configuration of the one or more MCG associations; Release the configuration associated with the CU to which the source MCG belongs; Suspend the configuration associated with the CU to which the source MCG belongs; Release the configuration associated with the target MCG.

23. The method according to claim 22, characterized in that The first configuration does not support the terminal device switching back to the CU previously connected, and the first operation includes releasing the configuration associated with the CU to which the source MCG belongs.

24. The method according to claim 22 or 23, characterized in that The first configuration does not support the terminal device switching back to the cell previously accessed, and the first operation includes releasing the configuration associated with the target MCG.

25. The method according to any one of claims 19 to 24, characterized in that The first event is related to an inter-CU MCG LTM or a primary cell change, the first configuration includes configurations associated with one or more secondary cell groups (SCGs), and the first operation includes one or more of the following: Release the configuration associated with the one or more SCGs; Release the configuration associated with one or more SCGs associated with the source MCG; Preserve the configuration associated with one or more SCGs associated with the target MCG; The configuration associated with the one or more SCGs is suspended.

26. The method according to any one of claims 19 to 21, characterized in that The first event is related to one or more of the following: intra-CU LTM, inter-CU SCG LTM, addition / change of primary and secondary cells; The first configuration includes configurations associated with one or more MCGs and / or configurations associated with one or more SCGs, and the first operation includes one or more of the following: retaining the configuration of the one or more MCG associations; retaining the configuration of the one or more SCG associations; suspending the use of the configuration associated with the one or more MCGs; The configuration associated with the one or more SCGs is suspended.

27. The method according to any one of claims 19 to 21, characterized in that The first event is related to one or more of the following: radio resource control RRC connection re-establishment, RRC release, MCG radio link failure, SCG radio link failure, SCG release; The first configuration includes configurations associated with one or more MCGs and / or configurations associated with one or more SCGs, and the first operation includes one or more of the following: Release the configuration associated with the one or more SCGs; Release the configuration associated with the one or more MCGs; retaining the configuration of the one or more MCG associations; retaining the configuration of the one or more SCG associations; suspending the use of the configuration associated with the one or more MCGs; The configuration associated with the one or more SCGs is suspended.

28. The method according to claim 27, characterized in that The first configuration is used to configure conditional LTM or the first configuration supports the function added by SCG, and the first operation includes retaining the configuration associated with one or more SCGs.

29. The method according to any one of claims 18 to 28, characterized in that The indication information is carried in one or more of the following: Cell switching command; RRC reconfiguration message; the first configuration; MAC CE.

30. The method according to claim 29, wherein The MAC CE is used to indicate first operations corresponding to multiple candidate cells, and the first operations corresponding to the multiple candidate cells are the same or different.

31. The method according to any one of claims 18 to 30, characterized in that The first configuration includes one or more of the following: configuration of one or more candidate cells; a measurement configuration associated with the one or more candidate cells; an advance synchronization configuration associated with the one or more candidate cells; Measurement reporting condition configuration associated with the one or more candidate cells; The handover condition configuration associated with the one or more candidate cells.

32. The method according to any one of claims 18 to 31, characterized in that Suspending the use of the first configuration includes: retaining the first configuration, but not performing measurement and / or measurement reporting related to the first configuration.

33. A terminal device, characterized in that: include: an execution module, configured to perform a first operation on a first configuration, where the first configuration is used to configure layer 1 / layer 2 triggered mobility LTM, the first operation comprising one or more of the following: releasing part or all of the first configuration; retaining part or all of the first configuration; Part or all of the first configurations are suspended.

34. The terminal device according to claim 33, characterized in that The first operation is triggered based on a first event, and the first event is related to the mobility of the terminal device.

35. The terminal device according to claim 34, characterized in that The first event includes one or more of the following: The terminal device triggers a first type of handover; The terminal device successfully completes the first type of handover; The terminal device receives a handover command of a first type of handover; The first type of handover includes LTM-related handover.

36. The terminal device according to claim 35, characterized in that The first type of handover includes one or more of the following: inter-CU LTM between central units, intra-CU LTM within a central unit, inter-DU LTM between distributed nodes, intra-DU LTM within a distributed node, and conditional LTM; Wherein, LTM includes MCG LTM and / or SCG LTM.

37. The terminal device according to any one of claims 34 to 36, characterized in that: The first event is related to an inter-CU primary cell group (MCG) LTM or a primary cell change, the first configuration includes one or more MCG-associated configurations, and the first operation includes one or more of the following: retaining the configuration of the one or more MCG associations; Release the configuration associated with the CU to which the source MCG belongs; Suspend the configuration associated with the CU to which the source MCG belongs; Release the configuration associated with the target MCG.

38. The terminal device according to claim 37, characterized in that The first configuration does not support the terminal device switching back to the CU previously connected, and the first operation includes releasing the configuration associated with the CU to which the source MCG belongs.

39. The terminal device according to claim 37 or 38, characterized in that The first configuration does not support the terminal device switching back to the cell previously accessed, and the first operation includes releasing the configuration associated with the target MCG.

40. The terminal device according to any one of claims 34 to 39, characterized in that: The first event is related to an inter-CU MCG LTM or a primary cell change, the first configuration includes configurations associated with one or more secondary cell groups (SCGs), and the first operation includes one or more of the following: Release the configuration associated with the one or more SCGs; Release the configuration associated with one or more SCGs associated with the source MCG; Preserve the configuration associated with one or more SCGs associated with the target MCG; The configuration associated with the one or more SCGs is suspended.

41. The terminal device according to any one of claims 34 to 36, characterized in that: The first event is related to one or more of the following: intra-CU LTM, inter-CU SCG LTM, addition / change of primary and secondary cells; The first configuration includes configurations associated with one or more MCGs and / or configurations associated with one or more SCGs, and the first operation includes one or more of the following: retaining the configuration of the one or more MCG associations; retaining the configuration of the one or more SCG associations; suspending the use of the configuration associated with the one or more MCGs; The configuration associated with the one or more SCGs is suspended.

42. The terminal device according to any one of claims 34 to 36, characterized in that: The first event is related to one or more of the following: radio resource control RRC connection re-establishment, RRC release, MCG radio link failure, SCG radio link failure, SCG release; The first configuration includes configurations associated with one or more MCGs and / or configurations associated with one or more SCGs, and the first operation includes one or more of the following: Release the configuration associated with the one or more SCGs; Release the configuration associated with the one or more MCGs; retaining the configuration of the one or more MCG associations; retaining the configuration of the one or more SCG associations; suspending the use of the configuration associated with the one or more MCGs; The configuration associated with the one or more SCGs is suspended.

43. The terminal device according to claim 42, characterized in that The first configuration is used to configure conditional LTM or the first configuration supports the function added by SCG, and the first operation includes retaining the configuration associated with one or more SCGs.

44. The terminal device according to any one of claims 33 to 43, characterized in that: The execution of the first operation is determined based on one or more of the following: The agreement stipulates; Instruction information sent by network equipment; an event that triggers the first operation; Preconfiguration information.

45. The terminal device according to claim 44, characterized in that The indication information is carried in one or more of the following: Cell switching command; RRC reconfiguration message; the first configuration; MAC CE.

46. ​​The terminal device according to claim 45, characterized in that The MAC CE is used to indicate first operations corresponding to multiple candidate cells, and the first operations corresponding to the multiple candidate cells are the same or different.

47. The terminal device according to any one of claims 44 to 46, characterized in that: The pre-configuration information includes a cell group identifier associated with the first candidate cell, and the cell group identifier is used to determine a first operation corresponding to the first candidate cell.

48. The terminal device according to any one of claims 33 to 47, characterized in that: The first configuration includes one or more of the following: configuration of one or more candidate cells; a measurement configuration associated with the one or more candidate cells; an advance synchronization configuration associated with the one or more candidate cells; Measurement reporting condition configuration associated with the one or more candidate cells; The handover condition configuration associated with the one or more candidate cells.

49. The terminal device according to any one of claims 33 to 48, characterized in that: The terminal device suspending the use of the first configuration includes: the terminal device retaining the first configuration but not performing measurements and / or measurement reporting related to the first configuration.

50. A network device, characterized in that include: A sending module, configured to send indication information to a terminal device, where the indication information is used to indicate a first operation for a first configuration, where the first configuration is used to configure layer 1 / layer 2 triggered mobility LTM, where the first operation includes one or more of the following: releasing part or all of the first configuration; retaining part or all of the first configuration; Part or all of the first configurations are suspended.

51. The network device according to claim 50, wherein: The first operation is triggered based on a first event, and the first event is related to the mobility of the terminal device.

52. The network device according to claim 51, wherein: The first event includes one or more of the following: The terminal device triggers a first type of handover; The terminal device successfully completes the first type of handover; The terminal device receives a handover command of a first type of handover; The first type of handover includes LTM-related handover.

53. The network device according to claim 52, wherein: The first type of handover includes one or more of the following: inter-CU LTM between central units, intra-CU LTM within a central unit, inter-DU LTM between distributed nodes, intra-DU LTM within a distributed node, and conditional LTM; Wherein, LTM includes MCG LTM and / or SCG LTM.

54. The network device according to any one of claims 51 to 53, characterized in that: The first event is related to an inter-CU primary cell group (MCG) LTM or a primary cell change, the first configuration includes one or more MCG-associated configurations, and the first operation includes one or more of the following: retaining the configuration of the one or more MCG associations; Release the configuration associated with the CU to which the source MCG belongs; Suspend the configuration associated with the CU to which the source MCG belongs; Release the configuration associated with the target MCG.

55. The network device according to claim 54, characterized in that The first configuration does not support the terminal device switching back to the CU previously connected, and the first operation includes releasing the configuration associated with the CU to which the source MCG belongs.

56. The network device according to claim 54 or 55, characterized in that: The first configuration does not support the terminal device switching back to the cell previously accessed, and the first operation includes releasing the configuration associated with the target MCG.

57. The network device according to any one of claims 51 to 56, characterized in that: The first event is related to an inter-CU MCG LTM or a primary cell change, the first configuration includes configurations associated with one or more secondary cell groups (SCGs), and the first operation includes one or more of the following: Release the configuration associated with the one or more SCGs; Release the configuration associated with one or more SCGs associated with the source MCG; Preserve the configuration associated with one or more SCGs associated with the target MCG; The configuration associated with the one or more SCGs is suspended.

58. The network device according to any one of claims 51 to 53, characterized in that: The first event is related to one or more of the following: intra-CU LTM, inter-CU SCG LTM, addition / change of primary and secondary cells; The first configuration includes configurations associated with one or more MCGs and / or configurations associated with one or more SCGs, and the first operation includes one or more of the following: retaining the configuration of the one or more MCG associations; retaining the configuration of the one or more SCG associations; suspending the use of the configuration associated with the one or more MCGs; The configuration associated with the one or more SCGs is suspended.

59. The network device according to any one of claims 51 to 53, characterized in that: The first event is related to one or more of the following: radio resource control RRC connection re-establishment, RRC release, MCG radio link failure, SCG radio link failure, SCG release; The first configuration includes configurations associated with one or more MCGs and / or configurations associated with one or more SCGs, and the first operation includes one or more of the following: Release the configuration associated with the one or more SCGs; Release the configuration associated with the one or more MCGs; retaining the configuration of the one or more MCG associations; retaining the configuration of the one or more SCG associations; suspending the use of the configuration associated with the one or more MCGs; The configuration associated with the one or more SCGs is suspended.

60. The network device according to claim 59, wherein: The first configuration is used to configure conditional LTM or the first configuration supports the function added by SCG, and the first operation includes retaining the configuration associated with one or more SCGs.

61. The network device according to any one of claims 50 to 60, characterized in that: The indication information is carried in one or more of the following: Cell switching command; RRC reconfiguration message; the first configuration; MAC CE.

62. The network device according to claim 61, wherein: The MAC CE is used to indicate first operations corresponding to multiple candidate cells, and the first operations corresponding to the multiple candidate cells are the same or different.

63. The network device according to any one of claims 50 to 62, characterized in that: The first configuration includes one or more of the following: configuration of one or more candidate cells; a measurement configuration associated with the one or more candidate cells; an advance synchronization configuration associated with the one or more candidate cells; Measurement reporting condition configuration associated with the one or more candidate cells; The handover condition configuration associated with the one or more candidate cells.

64. The network device according to any one of claims 50 to 63, characterized in that: Suspending the use of the first configuration includes: retaining the first configuration, but not performing measurement and / or measurement reporting related to the first configuration.

65. A terminal device, characterized in that: The terminal device comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so that the terminal device executes the method according to any one of claims 1 to 17.

66. A network device, characterized in that The network device comprises a transceiver, a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so as to enable the network device to execute the method according to any one of claims 18 to 32.

67. A device, characterized in that The device comprises a processor configured to call a program from a memory so as to enable the device to execute the method according to any one of claims 1 to 32.

68. A chip, characterized in that: The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 32.

69. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 32.

70. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 32.

71. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 32.

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