Wireless communication method, terminal equipment and network equipment

Abstract

The invention provides a wireless communication method, terminal equipment and network equipment. The method comprises: a terminal device receiving a first message sent by a network device, the first message comprising first information, the first information being used for instructing the terminal device to switch to a first condition switching candidate cell; in the embodiment of the invention, the first information sent by the network equipment to the terminal equipment can indicate the terminal equipment to be switched to the first condition switching candidate cell. In other words, the network equipment can participate in triggering condition switching through the first information, so that the terminal equipment executes condition switching. Compared with a condition switching mode based on terminal equipment autonomous control, on one hand, the condition switching triggering process control process can be more flexible, and the failure risk caused by the condition switching mode completely depending on terminal equipment autonomous control is reduced; and on the other hand, the problem of long-time resource reservation caused by a condition switching mode completely depending on autonomous control of the terminal equipment can be effectively improved, and the resource utilization efficiency is improved.

Description

Wireless communication method, terminal equipment and network equipment Technical Field

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

[0002] In the conditional switching mechanism, after the terminal device receives the conditional switching configuration information, it starts to execute the switching condition evaluation task related to the conditional switching, that is, to evaluate whether the switching condition associated with each conditional switching candidate cell is met. At present, in the process of executing the switching condition evaluation task related to the conditional switching, either a conditional switching method controlled autonomously by the terminal device is adopted, in which the terminal device autonomously evaluates whether the switching condition is met, and when the switching condition associated with at least one conditional switching candidate cell is met, the terminal device selects a conditional switching candidate cell that meets the switching condition to initiate the switching process; or after the terminal device receives the timely switching command sent by the network device, it immediately executes the timely switching command and exits the conditional switching. In other words, under the above-mentioned conditional switching mechanism, the network device cannot decide which conditional switching candidate cell the terminal device connects to.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method, terminal device, and network device. The following introduces various aspects of the present application.

[0005] In a first aspect, a method for wireless communication is provided, including: a terminal device receiving a first message sent by a network device, the first message including first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

[0006] In a second aspect, a method for wireless communication is provided, including: a network device sends a first message to a terminal device, the first message including first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

[0007] According to a third aspect, a terminal device is provided, comprising: a first receiving unit for receiving a first message sent by a network device, wherein the first message comprises first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

[0008] In a fourth aspect, a network device is provided, comprising: a first sending unit, configured to send a first message to a terminal device, wherein the first message comprises first information, and the first information is configured to instruct the terminal device to switch to a first conditional switching candidate cell.

[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, which stores a computer program, and the computer program enables a terminal device and / or a network device 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 terminal device and / or a network device 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, the first information sent by the network device to the terminal device can instruct the terminal device to switch to the first conditional switching candidate cell. In other words, the network device can participate in triggering the conditional switching through the first information, so that the terminal device performs the conditional switching. Compared with the conditional switching method based on the autonomous control of the terminal device, on the one hand, the triggering control process of the conditional switching can be made more flexible, reducing the risk of failure caused by the conditional switching method that completely relies on the autonomous control of the terminal device; on the other hand, it can effectively improve the problem of long-term resource reservation caused by the conditional switching method that completely relies on the autonomous control of the terminal device, thereby achieving efficient resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the control plane networking method in the dual-connection scenario of EN-DC.

[0017] FIG2 is a schematic diagram of the architecture of a communication system applicable to an embodiment of the present application.

[0018] FIG3 is a flow chart of a wireless communication method according to an embodiment of the present application.

[0019] FIG4 is a schematic flow chart of a wireless communication method provided in another embodiment of the present application.

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

[0021] FIG6 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application.

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

[0023] FIG8 is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The technical solution of this application will be described below in conjunction with the accompanying drawings. In order to facilitate understanding of this application, the communication process involved in the embodiment of this application will be described below in conjunction with Figures 1 and 2.

[0025] Dual-connection communication scenario

[0026] 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 a new radio (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.

[0027] 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 1. 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.

[0028] The following describes a communication system applicable to the embodiment of the present application by taking the communication system 20 shown in FIG. 2 as an example.

[0029] Figure 2 is a schematic diagram of the architecture of a communication system 20 provided in an embodiment of the present application. As shown in Figure 2, communication system 20 may include network device 201, network device 202, network device 205, terminal device 203, and terminal device 204. Figure 2 is merely a schematic diagram and does not limit the applicable scenarios of the technical solutions provided in this application.

[0030] The network device in Figure 2, namely network device 201, network device 202 or network device 205, can be any device with wireless transceiver functions. Including but not limited to: evolutionary Node B (NodeB or eNB or e-NodeB) in LTE, base station (gNodeB or gNB) or transmission receiving point (transmission receiving point / transmission reception point, TRP) in NR, subsequent evolution of 3GPP, etc. The base station can be: macro base station, micro base station, pico base station, small station, relay station, or balloon station, etc. Multiple base stations can support the network of the same technology mentioned above, or they can support the networks of different technologies mentioned above. The base station can include one or more co-site or non-co-site TRPs. The network device can also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario.

[0031] The terminal device in Figure 2, i.e., terminal device 203 or terminal device 204, is a device with wireless transceiver function, which can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air (for example, on an airplane, a balloon, and a satellite, etc.). The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a terminal in industrial control, a vehicle-mounted terminal device, a terminal in self-driving, a terminal in assisted driving, a terminal in remote medical care, a terminal in smart grid, a terminal in transportation safety, a terminal in smart city, a terminal in smart home, etc. The embodiments of the present application do not limit the application scenarios. Terminal equipment may also be sometimes referred to as terminal, user equipment (UE), access terminal, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal device, wireless communication device, machine terminal, UE agent, or UE device. Terminals can be fixed or mobile.

[0032] As an example and not a limitation, in an embodiment of the present application, the terminal may be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0033] Cell switching

[0034] Cell handover (HO) aims to improve the continuity of service provided by the communication system to terminal devices. In a wireless communication system, a terminal device can move from one cell (also known as the "source cell") to another cell (also known as the "target cell"). The cell can be a PCell or a primary / secondary PSCell. Generally, cell handover can be divided into two types: traditional handover mechanism and conditional handover mechanism.

[0035] For the traditional switching mechanism, in order to improve the continuity of the service provided by the communication system to the terminal device in the connected state, the network device will send a timely switching command to the terminal device at an appropriate time (for example, the signal measurement result of the terminal device in the service cell is lower than the threshold) to instruct the terminal device to perform cell switching. In the traditional switching mechanism, the timely switching command can be used to instruct the terminal device to switch from the source cell to the target cell. The timely switching command can, for example, include the identifier of the target cell and the configuration information of the target cell, so that the terminal device can access the target cell using the configuration of the target cell. In some implementations, the above-mentioned timely switching command can be understood as a traditional switching message, or it can be an RRC reconfiguration message containing synchronization reconfiguration information.

[0036] For the conditional switching mechanism, the network device can send conditional switching configuration information to the terminal device to configure the configuration information associated with at least one conditional switching candidate cell to the terminal device. Accordingly, after receiving the conditional switching configuration information, the terminal device starts to execute the conditional switching evaluation process (that is, starts to execute the switching condition evaluation task related to the conditional switching) to evaluate whether the switching condition associated with the above-mentioned at least one conditional switching candidate cell is met. When the switching condition associated with the above-mentioned at least one conditional switching candidate cell is met, the terminal device can select a conditional switching candidate cell that meets the switching condition to initiate the switching process, and switch from the source cell (or "current serving cell") to the selected conditional switching candidate cell that meets the switching condition (the selected conditional switching candidate cell that meets the switching condition can also be called a "target cell").

[0037] At present, the above-mentioned conditional switching mechanism can be applied to the scenario of conditional PSCell addition (CPA), the scenario of conditional PSCell modification (CPC), and the scenario of conditional PCell modification (also called conditional handover, CHO). It should be noted that the CPA scenario and the CPC scenario can also be collectively referred to as the scenario of conditional PSCell addition / modification (CPAC). It should also be noted that in the CPAC scenario, the above-mentioned conditional switching candidate cell is the candidate PSCell, and the source cell is the source PSCell. In the scenario of conditional PCell modification, the above-mentioned conditional switching candidate cell is the candidate PCell, and the source cell is the source PCell.

[0038] In the CPAC scenario, the source PCell or source PSCell can send conditional switching configuration information to the terminal device, wherein the conditional switching configuration information may include configuration information associated with at least one conditionally added / modified candidate PSCell cell, such as configuration information of at least one conditionally added / modified candidate PSCell cell and switching conditions associated with each conditionally added / modified candidate PSCell cell, etc. Accordingly, after the terminal device successfully performs conditional switching based on the conditional switching configuration information, the terminal device will delete all saved configuration information associated with the conditionally added / modified candidate PSCell cell. Among them, the successful execution of conditional switching by the terminal device based on the conditional switching configuration information can be understood as the terminal device successfully accessing a conditional switching candidate PSCell cell (the candidate PSCell cell accessed can be referred to as a "target PSCell cell").

[0039] In a conditional PCell modification (CHO) scenario, the source PCell may send conditional handover configuration information to the terminal device. This conditional handover configuration information may include configuration information associated with at least one candidate PCell cell for conditional handover, such as configuration information for at least one candidate PCell cell for conditional handover and handover conditions associated with each candidate PCell cell for conditional handover. Accordingly, after the terminal device successfully performs conditional handover based on the conditional handover configuration information, the terminal device deletes all previously saved configuration information associated with the candidate PCell cells for conditional handover.

[0040] For ease of understanding, the following describes conditional switching using the CPAC process as an example with reference to Figure 2. It should be noted that the process of conditional PCell modification is similar to the CPAC process and will not be described separately for brevity.

[0041] In Figure 2 , terminal device 203 or terminal device 204 can be dual-connected to network device 205 and network device 202, where one network device is a MN and the other network device is a SN. In the communication system 20 shown in Figure 2 , terminal device 203 or terminal device 204 can perform CPAC, for example, CPA or CPC.

[0042] The following example uses CPA performed on a terminal device as an example.

[0043] Taking the example of terminal device 203 establishing an RRC connection with network device 201 and terminal device 203 wanting to perform CPA and establish a connection with network device 202, after network device 201 establishes an RRC connection with terminal device 203, it can configure one or more candidate PSCells for terminal device 203 (i.e., the PSCell conditional addition: CPA described above). The one or more candidate PSCells include the PSCell configured by network device 202 for terminal device 203 and the PSCells configured by other network devices for terminal device 203; network device 201 sends configuration information associated with the one or more candidate PSCells to terminal device 203. After receiving the configuration information associated with the one or more candidate PSCells from network device 201, terminal device 203 can evaluate the addition condition associated with the one or more candidate PSCells. If it is evaluated that at least one candidate PSCell meets the addition condition, terminal device 203 selects one of the candidate PSCells (e.g., the candidate PSCell configured by network device 202 for the terminal) and applies the configuration of the candidate PSCell. Subsequently, the terminal device 203 initiates a connection establishment process with the candidate PSCell, and after the candidate PSCell connection establishment process is successful, establishes a dual connection with the network device 202. The configuration information associated with the candidate PSCell may also be referred to as the CPA configuration information of the candidate PSCell or the conditional switching configuration information related to the CPA of the candidate PSCell. This embodiment of the present application does not limit the name of this configuration information.

[0044] As mentioned above, no matter what kind of conditional switching is performed in which scenario, when the terminal device successfully executes the conditional switching, the terminal device will release (or delete) all the conditional switching configuration information. When the terminal device needs to perform the next conditional switching, the network device needs to re-provide the conditional switching configuration information to the terminal device. In this way, the overhead required for the network device to transmit the conditional switching configuration information will increase. However, it is actually unnecessary for the network device to re-provide the conditional switching configuration information to the terminal device during each round of conditional switching of the terminal device. Because in some cases, the conditional switching configuration information used by the terminal device for conditional switching may be the same. For example, when the terminal device moves within a small range, the candidate cells evaluated by the terminal device in each round of conditional switching process may be basically the same.

[0045] Therefore, to reduce the overhead of transmitting conditional switching configuration information, a continuous conditional switching process can be adopted. That is, the terminal device can perform multiple rounds of conditional switching based on the conditional switching configuration information configured once by the network device. In this way, the network device does not need to re-provide the conditional switching configuration information to the terminal device after each round of conditional switching, which helps to reduce the overhead of transmitting conditional switching configuration information.

[0046] In some implementations, the terminal device may perform multiple rounds of conditional switching based on the same conditional switching configuration information within a period of time. The period of time may be predefined or preconfigured. In other implementations, when a first condition is met, the terminal device may perform multiple rounds of conditional switching based on the same conditional switching configuration information. The first condition may be, for example, that the mobile range of the terminal device is less than a threshold. Of course, the embodiments of the present application do not specifically limit the content of the first condition. In addition, the above-mentioned first condition may be network configured, or the above-mentioned first condition may be predefined.

[0047] It should be noted that, in the above-mentioned continuous conditional switching process, the conditional switching configuration information used by the terminal device can be understood as the historical service cell configuration of the terminal device. Among them, the historical service cell is the service cell currently connected by the terminal device or the cell that provided service to the terminal device before the service cell currently connected by the terminal device.

[0048] Whether in the continuous conditional switching scenario introduced above or in the scenario where the terminal device deletes the conditional switching configuration information after each successful conditional switching, the above conditional switching mechanism adopts a two-step processing mode: the first step is that the terminal device receives the conditional switching configuration information configured by the network device, and the conditional switching configuration information includes configuration information associated with at least one switching candidate cell (for example, configuration information of at least one conditional switching candidate cell and the switching condition associated with the at least one conditional switching candidate cell); the second step is that after successfully receiving the conditional switching configuration information configured by the network device, the terminal device begins to evaluate whether the switching condition associated with each conditional switching candidate cell is met. When the switching condition associated with at least one conditional switching candidate cell is met, the terminal device will select a conditional switching candidate cell that meets the switching condition to initiate the switching process.

[0049] During the handover evaluation process of the terminal device (after the terminal device receives the conditional handover configuration information configured by the network device and before the handover condition associated with at least one conditional handover candidate cell is met), the network device's behavior includes two possible behaviors: Behavior mode 1, does not interfere with the conditional handover process of the terminal device, and allows the terminal device to continue to evaluate the handover condition associated with each conditional handover candidate cell. After the handover condition is met, the terminal device will automatically initiate the handover process to the conditional handover candidate cell that meets the handover condition. This method in which the network device does not interfere with the conditional handover process can also be called the conditional handover method of autonomous control of the terminal device; Behavior mode 2, sends a timely handover command to the terminal device. In this method, it indicates that the network device does not want the terminal device to continue to perform conditional handover. The terminal device will immediately execute the timely handover command, exit the conditional handover, and switch to the traditional handover mechanism. At the same time, the terminal device will delete all stored conditional handover configuration information.

[0050] In other words, under the aforementioned conditional handover mechanism, the network device cannot determine which candidate cell the terminal device will access, as the handover conditions are completely independently evaluated by the terminal device. Sending a timely handover command would also mean that the terminal device would abandon the conditional handover. In reality, in a continuous conditional handover scenario, the terminal device does not necessarily delete the stored conditional handover configuration information after executing a conditional handover. This implementation leaves room for the network device to control the terminal device's conditional handover process, and the network device may also participate in the decision-making process of the candidate cell for conditional handover.

[0051] Based on this, the embodiments of the present application provide a wireless communication method, terminal device, and network device. Before introducing the wireless communication method provided by the embodiments of the present application, the implementation of trigger condition switching that may be supported by the network device is first introduced.

[0052] It should be understood that the implementation method of triggering conditional switching supported by the network device may mean that, in the scenario of conditional switching, the network device can indicate (inform) the terminal device of a conditional switching candidate cell through the implementation method, and let the terminal device try to access the conditional switching candidate cell, so that the network device decides which conditional switching candidate cell the terminal device accesses. The conditional switching candidate cell is one of at least one conditional switching candidate cell configured by the network device to the terminal device. Optionally, if the terminal device does not delete the stored configuration information associated with at least one conditional switching candidate cell after successfully accessing the conditional switching candidate cell, the network device may subsequently continue to indicate the terminal device to access a conditional switching candidate cell through the implementation method provided in the embodiment of the present application, and / or the terminal device may also trigger subsequent conditional switching through the conditional switching evaluation process performed by itself.

[0053] In some embodiments, the network device may trigger conditional handover through high-layer signaling, i.e., instruct (inform) the terminal device of the conditional handover candidate cell to be accessed through high-layer signaling, for example, it may be triggered through an RRC message. In some embodiments, the network device may trigger conditional handover through low-layer signaling, for example, it may be triggered through a MAC control element (MAC CE) message or a downlink control information (DCI) message. By way of example, several implementations of triggering conditional handover supported by the network device are given below.

[0054] Implementation method 1: Network equipment only supports RRC message triggering

[0055] The network device only supports indicating the conditional handover candidate cell to be accessed by the terminal device through RRC messages. In some embodiments, when the network device configures the configuration information associated with at least one conditional handover candidate cell to the terminal device through an RRC message, the network device can instruct the terminal device to switch to one of the at least one conditional handover candidate cell in the RRC message. In some embodiments, the network device can configure the configuration information associated with at least one conditional handover candidate cell to the terminal device in advance. Under this premise, when the network device configures other information to the terminal device through an RRC message, the network device can instruct the terminal device to switch to one of the at least one conditional handover candidate cell configured in advance in the RRC message.

[0056] Optionally, if the terminal device does not delete the stored configuration information associated with at least one conditional switching candidate cell after a conditional switching is successful, then in implementation method 1, subsequent conditional switching can be triggered by the conditional switching evaluation process performed by the terminal device itself.

[0057] It can be understood that in implementation method 1, the process of the network device triggering conditional switching through an RRC message can be understood as just a single behavior performed by the network device when configuring the terminal device through an RRC message, for example, a single behavior performed by the way when configuring at least one conditional switching candidate cell associated with the configuration information. In the subsequent process, if the network device does not intend to change the configuration information associated with at least one conditional switching candidate cell stored by the terminal device or does not intend to participate in the conditional switching triggering process, then the network device can rely entirely on the conditional switching evaluation process performed by the terminal device itself to trigger subsequent conditional switching.

[0058] Implementation 2: Network equipment supports both RRC message triggering and MAC CE / DCI message triggering

[0059] The scheme of triggering conditional switching by the network device through RRC messages can be found in the specific description of Implementation Method 1 and will not be repeated here. In Implementation Method 2, the network device can also trigger conditional switching through MAC CE / DCI messages, that is, in the scenario of conditional switching, the network device can also instruct the terminal device through MAC CE / DCI messages which conditional switching candidate cell to access.

[0060] Similar to implementation method 1, in implementation method 2, the network device triggering conditional switching through RRC messages is only a single behavior performed by the network device when configuring the terminal device through RRC messages, for example, a single behavior performed by the way when configuring the configuration information associated with at least one conditional switching candidate cell. In the case where the stored configuration information associated with at least one conditional switching candidate cell is not deleted after the switching is successful, in the subsequent process, if the network device does not intend to change the configuration information associated with at least one conditional switching candidate cell stored by the terminal device, then the network device can also trigger subsequent conditional switching through MAC CE / DCI messages. This implementation method is more flexible. However, the embodiments of the present application are not limited to this. The subsequent conditional switching process can also be triggered by relying on the conditional switching evaluation process executed by the terminal device itself.

[0061] Implementation method 3: Network equipment only supports MAC CE / DCI message triggering

[0062] The network device can configure the configuration information associated with at least one conditional switching candidate cell for the terminal device in advance through an RRC message. Under this premise, the network device can send a MAC CE / DCI message to the terminal device to trigger conditional switching to instruct the terminal device to access one of the at least one conditional switching candidate cells.

[0063] In some embodiments, if the terminal device does not delete the stored configuration information associated with at least one conditional handover candidate cell after a conditional handover is successful, then in implementation method 3, if the network device does not intend to change the configuration information associated with at least one conditional handover candidate cell stored by the terminal device, in the subsequent conditional handover process, the network device can continue to trigger subsequent conditional handovers through MAC CE / DCI messages. However, the embodiments of the present application are not limited to this, and the subsequent conditional handover process can also be triggered by relying on the conditional handover evaluation process executed by the terminal device itself.

[0064] Optionally, for any of the above implementations 1 to 3, there may be the following two implementation constraints:

[0065] Constraint mode 1: After the terminal device receives the configuration information associated with the conditional handover candidate cell sent by the network device, the first round of conditional handover execution can be performed either through network device signaling instructions or through the terminal device's independent evaluation of the handover conditions. However, subsequent conditional handovers can only wait for network device instructions. That is, subsequent conditional handovers are not allowed to be triggered by the terminal device's independent evaluation of the handover conditions.

[0066] Constraint method 2: After the terminal device receives the configuration information associated with the conditional switching candidate cell sent by the network device, the first round of conditional switching can be performed either through network device signaling instructions or through the terminal device's autonomous evaluation of the switching conditions, but subsequent conditional switching can only be triggered through the terminal device's autonomous evaluation process, that is, the network device is not allowed to trigger subsequent conditional switching through signaling instructions (the configuration information associated with the conditional switching candidate cell remains unchanged). If the network device is ready to update the configuration information associated with the conditional switching candidate cell for the terminal device, then in this scenario, the network device allows the triggering of conditional switching through signaling instructions (which can also be understood as the first round of conditional switching under the new configuration).

[0067] If the terminal device supports network device-triggered conditional handover, the network device can participate in the decision-making of conditional handover candidate cells based on any of the above implementation methods. As an implementation method, the terminal device can inform the network device whether the terminal device supports the network device-triggered conditional handover capability by reporting capabilities.

[0068] Specifically, in some embodiments, the terminal device may send capability indication information to the network device to report the capabilities of the terminal device. Exemplarily, the capability indication information may be used to indicate one or more of the following capabilities: whether the terminal device supports a continuous conditional switching function; whether the terminal device supports a conditional switching function triggered based on a network device; whether the terminal device supports a conditional switching function triggered based on the RRC layer of the network device; whether the terminal device supports a conditional switching function triggered based on the MAC layer or physical layer of the network device. It should be noted that the network device that receives the capability indication information sent by the terminal device and the network device that sends the conditional switching configuration information (or the third message below) to the terminal device may be the same network device or different network devices.

[0069] As an implementation method, the above-mentioned capability indication information may include one bit. In this implementation method, the above-mentioned at least one function shares the capability indication information, that is, the above-mentioned at least one function is either fully supported by the terminal device or not supported by the terminal device at all.

[0070] As another implementation method, the above-mentioned capability indication information contains at least two bits. Under this implementation method, each bit corresponding to the above-mentioned capability indication information is associated with one or a group of functions. Compared with the implementation method in which the capability indication information contains one bit, this implementation method has smaller granularity and is more flexible.

[0071] Whether the network device triggers conditional handover or the terminal device triggers conditional handover, before the conditional handover is triggered, the network device will configure conditional handover configuration information for the terminal device. This conditional handover configuration information is used to configure configuration information associated with at least one conditional handover candidate cell. For example, in implementation method 1 or implementation method 2, the network device can indicate the conditional handover candidate cell to be accessed by the terminal device when sending the conditional handover configuration information to the terminal device via an RRC message; in implementation method 3, after the network device sends the conditional handover configuration information to the terminal device via an RRC message, it indicates the conditional handover candidate cell to be accessed by the terminal device via a MAC CE / DCI message.

[0072] In some implementations, the conditional switching configuration information includes configuration information associated with at least one conditional switching candidate cell, wherein the configuration information associated with any one of the at least one conditional switching candidate cell may include one or more of the following configuration parameters.

[0073] Configuration parameter 1: logical number identifier associated with the conditional switching candidate cell, used to identify the logical number of a CHO configuration, CPA configuration or CPC configuration. It should be noted that under the conditional switching mechanism, the network device will configure at least one conditional switching candidate cell-associated configuration information for the terminal device. In order to facilitate related operations on the configuration information associated with the conditional switching candidate cell, such as: adding, modifying (updating) or deleting the configuration information associated with the conditional switching candidate cell, when configuring at least one conditional switching candidate cell-associated configuration information, the network device will assign a logical number identifier to each conditional switching candidate cell-associated configuration information. For example: the network device configures 4 conditional switching candidate cell-associated configuration information for the terminal device, then these 4 conditional switching candidate cell-associated configuration information will be assigned logical number identifiers 0, 1, 2 and 3 in sequence. In some implementations, the logical number identifier associated with the conditional switching candidate cell can be configured by the parameter CondReconfigId.

[0074] In some embodiments, the logical number identifier associated with the conditional handover candidate cell may refer to the logical number identifier associated with the conditional handover candidate cell that needs to be added or modified. In some embodiments, the logical number identifier associated with the conditional handover candidate cell may refer to the logical number identifier associated with the conditional handover candidate cell that needs to be deleted.

[0075] Configuration parameter 2: Handover condition associated with the conditional handover candidate cell. In some implementations, configuration parameter 2 may include at least one measurement ID, one measurement ID is associated with a measurement object (MO) configuration and a measurement report configuration. In some implementations, the measurement report configuration may include a conditional handover event. The conditional handover event is used by the terminal device to determine whether to trigger handover to the conditional handover candidate cell associated with the conditional handover event. Therefore, the conditional handover event can also be called a "conditional handover trigger condition" or a "handover condition related to conditional handover."

[0076] In some implementations, a conditional handover candidate cell may be associated with only one conditional handover event configuration information, that is, the configuration parameter 2 associated with a conditional handover candidate cell includes only one measurement ID.

[0077] In other implementations, a conditional handover candidate cell may be associated with at least two conditional handover event configuration information, or in other words, the configuration parameter 2 associated with a conditional handover candidate cell includes at least two measurement IDs. In this case, the conditional handover event associated with the conditional handover candidate cell may be satisfied in two situations. In situation 1, the handover condition associated with the conditional handover candidate cell is considered satisfied only when the conditional handover events corresponding to at least two conditional handover event configuration information are satisfied (or triggered). In situation 2, the handover condition event associated with the conditional handover candidate cell is considered satisfied only when at least one of the conditional handover events corresponding to at least two conditional handover event configuration information is satisfied.

[0078] Configuration parameter 3: Cell identifier associated with a conditional handover candidate cell. Considering that different cells can be distinguished by different cell identifiers, in some embodiments, the configuration information associated with a conditional handover candidate cell may include a cell identifier associated with the conditional handover candidate cell to identify each conditional handover candidate cell. That is, a cell identifier may be associated with one configuration information associated with a conditional handover candidate cell.

[0079] The embodiment of the present application does not specifically limit the form of the cell identifier. For example, the cell identifier can be one or more of the following forms: a cell global identifier (CGI), a physical cell identifier (PCI) and frequency combination information corresponding to the cell, and a serving cell identifier (serving cell index) corresponding to the cell, etc.

[0080] Configuration parameter 4: cell configuration associated with the conditional handover candidate cell. The terminal device can switch to the conditional handover candidate cell based on the cell configuration associated with the conditional handover candidate cell. In some implementations, configuration parameter 4 may include one or more of the following configuration information: relevant configuration information of the non-access stratum (NAS) layer, relevant configuration information of the service data adaptation protocol (SDAP) layer, relevant configuration information of the RRC layer, relevant configuration information of the packet data convergence protocol (PDCP) layer, relevant configuration information of the backhaul adaptation protocol (BAP) layer, relevant configuration information of the radio link control (RLC) layer, relevant configuration information of the media access control (MAC) layer, relevant configuration information of the physical layer, configuration information related to the data radio bearer (DRB), configuration information related to the frequency band and bandwidth supported by the conditional handover candidate cell, and random access configuration information, etc.

[0081] The configuration parameters listed in this application are for example only. The configuration information associated with the conditional handover candidate cell may also include other configuration parameters not listed, such as the protocol stack associated with the conditional handover candidate cell.

[0082] The wireless communication method provided by the embodiment of the present application is described below in conjunction with Figure 3. The wireless communication method provided by the embodiment of the present application can be applied to any of the conditional switching application scenarios described above, such as the conditional PSCell addition (CPA) scenario, the conditional PSCell modification (CPC) scenario, the conditional PCell modification (CHO) scenario, the continuous conditional switching scenario, etc., and the embodiment of the present application is not limited to this.

[0083] The method of Figure 3 is described from the perspective of interaction between a terminal device and a network device. The terminal device may be, for example, terminal device 203 or terminal device 204 in Figure 2 , and the network device may be, for example, network device 201, network device 202, or network device 205 in Figure 2 . The method shown in Figure 3 may include step S310, which is described in detail below.

[0084] In step S310, the network device sends a first message to the terminal device.

[0085] Optionally, the network device that sends the first message may be the MN or SN to which the terminal device is connected.

[0086] Based on the different implementation methods of trigger condition switching supported by the network device, the type of the first message sent by the network device to the terminal device can be different. For example, if the network device only supports RRC message trigger condition switching, then the type of the first message sent by the network device to the terminal device can be an RRC message. Alternatively, if the network device supports both RRC message trigger condition switching and MAC CE / DCI message trigger condition switching, then the type of the first message sent by the network device to the terminal device can be one or more of an RRC message, a MAC CE message, and a DCI message.

[0087] That is, the first message may include multiple types, for example, it may be one or more of the following message types: RRC message, MAC CE message, or DCI message.

[0088] In some embodiments, the network device that sends the first message to the terminal device and the network device that sends the conditional switching configuration information (or the third message below) to the terminal device can be the same network device or different network devices.

[0089] The first message includes first information, which is used to instruct the terminal device to switch to the first conditional switching candidate cell. In other words, the first information can be understood as a conditional switching instruction sent by the network device, which is used to instruct the terminal device to switch to the first conditional switching candidate cell.

[0090] The first conditional switching candidate cell can be understood as one of the at least one conditional switching candidate cell configured by the network device to the terminal device, wherein the at least one conditional switching candidate cell can be understood as the cell that the terminal device may switch to in a conditional switching scenario. The first conditional switching candidate cell is the cell that the network device informs the terminal device to switch to through the first information. In some embodiments, the first conditional switching candidate cell can also be called the conditional switching target cell.

[0091] In some embodiments, the first information may include identity information of the first conditional switching candidate cell, so that the terminal device determines the first conditional switching candidate cell and attempts to access the first conditional switching candidate cell. Exemplarily, the first information may include a logical number identifier associated with the first conditional switching candidate cell (see configuration parameter 1 above) and / or a cell identifier associated with the first conditional switching candidate cell (see configuration parameter 3 above). It should be understood that the first information may also include other information associated with the first conditional switching candidate cell, such as the cell configuration associated with the first conditional switching candidate cell, the switching condition associated with the first conditional switching candidate cell, etc., which is not limited in the embodiments of the present application.

[0092] In an embodiment of the present application, the first information sent by the network device to the terminal device can instruct the terminal device to switch to the first conditional switching candidate cell. That is to say, the network device can participate in triggering the conditional switching through the first information, so that the terminal device performs the conditional switching. Compared with the conditional switching method based on the autonomous control of the terminal device, on the one hand, the triggering control process of the conditional switching can be made more flexible, reducing the risk of failure caused by the conditional switching method that relies entirely on the autonomous control of the terminal device; on the other hand, the conditional switching method triggered by the network device is more conducive to the efficient use of the reserved resources of multiple conditional switching candidate cells, and can effectively improve the problem of long-term resource reservation caused by the conditional switching method that relies entirely on the autonomous control of the terminal device, thereby achieving efficient resource utilization.

[0093] As described above, the first message may include multiple types. The following describes in detail the process of network devices participating in trigger condition switching in conjunction with the types of the first message.

[0094] The first message is an RRC message

[0095] When the first message is an RRC message, it can be understood that the network device indicates the conditional handover candidate cell to be accessed by the terminal device through high-layer signaling.

[0096] Referring to FIG. 4 , in step S410 , the network device sends a first message to the terminal device, where the first message is an RRC message.

[0097] The first message includes first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

[0098] In some embodiments, in addition to indicating the conditional handover candidate cell to be accessed by the terminal device, the RRC message may also be used to configure the terminal device, for example, to configure configuration information associated with at least one conditional handover candidate cell. In this case, it can be understood that the network device indicating the conditional handover candidate cell to be accessed by the terminal device through the RRC message is only a single action performed by the network device when configuring the terminal device through the RRC message.

[0099] In the case where the first message is also used to configure configuration information associated with at least one conditional switching candidate cell to the terminal device, it can be understood that the network device that sends the first message to the terminal device and the network device that sends the conditional switching configuration information to the terminal device are the same network device. In this case, the first message may also include one or more of the following information: a logical number identifier associated with the conditional switching candidate cell that needs to be added or modified; a switching condition associated with the conditional switching candidate cell that needs to be added or modified; a cell identifier associated with the conditional switching candidate cell that needs to be added or modified; a cell configuration associated with the conditional switching candidate cell that needs to be added or modified; and a logical number identifier associated with the conditional switching candidate cell that needs to be deleted. For detailed information on the various information contained in the above-mentioned first message, please refer to the relevant description of the configuration parameters part of the configuration information associated with the conditional switching candidate cell above, which will not be repeated here.

[0100] In some embodiments, after receiving the first message sent by the network device, the terminal device may further perform step S420. In step S420, the terminal device determines a first conditional handover candidate cell based on the first information and applies the cell configuration associated with the first conditional handover candidate cell to switch to the first conditional handover candidate cell.

[0101] After the terminal device determines the first conditional switching candidate cell based on the first information (for example, based on the logical number identifier or cell identifier contained in the first information), since the content contained in the first information can index the cell configuration associated with the first conditional switching candidate cell, the terminal device can determine the cell configuration associated with the first conditional switching candidate cell through the first information. The terminal device applies the cell configuration associated with the first conditional switching candidate cell to switch to the first conditional switching candidate cell, which can mean: the terminal device initiates a switching process to the first conditional switching candidate cell determined according to the first information; or, in other words, the terminal device attempts to access the first conditional switching candidate cell determined according to the first information.

[0102] It should be understood that in step S420, the terminal device applies the cell configuration associated with the first conditional switching candidate cell to switch to the first conditional switching candidate cell, which does not limit the terminal device to being able to successfully switch to the first conditional switching candidate cell, or does not limit the terminal device to being able to successfully access the first conditional switching candidate cell. It is only used to indicate that after the terminal device determines the first conditional switching candidate cell, it attempts to switch or attempts to access the first conditional switching candidate cell.

[0103] In some embodiments, in addition to the network device being able to participate in the triggering of the conditional switch, the terminal device itself can also trigger the conditional switch based on the conditional switch evaluation task. In order to avoid conflicts between the network device triggering the conditional switch and the terminal device itself triggering the conditional switch, optionally, in this case, the priority of the network device triggering the conditional switch and the terminal device itself triggering the conditional switch can be: the priority of the conditional switch triggered by the network device is higher than the priority of the conditional switch triggered by the terminal device. However, the embodiments of the present application are not limited to this. In some embodiments, the priority of the conditional switch triggered by the terminal device may also be higher than the priority of the conditional switch triggered by the network device.

[0104] If the priority of the conditional switching triggered by the network device is higher than the priority of the conditional switching triggered by the terminal device, after step S410, the terminal device may further perform one or more of the following steps:

[0105] If the terminal device is executing a switching condition evaluation task related to the conditional switching, the terminal device stops the switching condition evaluation task related to the conditional switching being executed;

[0106] If the terminal device is about to attempt to access the second conditional handover candidate cell because the handover condition associated with at least one conditional handover candidate cell is satisfied, the terminal device abandons the attempt to access the second conditional handover candidate cell.

[0107] Optionally, as an implementation method, the network device may send an indication message to the terminal device, and the indication message is used to instruct the terminal device to stop the switching condition evaluation task related to the conditional switching being executed, so as to avoid a conflict between the way the network device triggers the conditional switching and the way the terminal device itself triggers the conditional switching through the switching condition evaluation task, or to save power for the terminal device (because the terminal device does not need to execute the switching condition evaluation task at any time). It should be noted that the above indication message may be included in the first message or in the fourth message, wherein the fourth message is a message different from the first message. For example, before the network device sends the first message to the terminal device, the fourth message may be sent to the terminal device to instruct the terminal device to stop the switching condition evaluation task related to the conditional switching being executed. It should be understood that the network device that sends the indication message to the terminal device and the network device that sends the conditional switching configuration information (or the third message below) to the terminal device may be the same network device or different network devices.

[0108] In some embodiments, after step S410, the terminal device may further perform one or more of the following steps:

[0109] The terminal device sends an RRC reconfiguration complete message to the MN or SN to which it is connected;

[0110] The terminal device stops exchanging user data with the MN or SN to which it is connected;

[0111] The upper layer of the terminal device notifies the PDCP layer of the terminal device to generate a PDCP status report, and sends the PDCP status report to the MN connected to itself, or to the first conditional handover candidate cell during the handover process;

[0112] The higher layer of the terminal device notifies the PDCP layer of the terminal device to perform a PDCP data recovery operation.

[0113] Among them, the above-mentioned PDCP status report is used to assist network equipment in retransmitting user data or continuously transmitting user data, thereby improving the service continuity of terminal equipment; the above-mentioned PDCP data recovery, i.e., PDCP data recovery, is also used for continuous transmission of user data.

[0114] Optionally, the network device may also carry switch indication information in the above-mentioned first message, and the switch indication information is used to indicate whether the terminal device needs to generate a PDCP status report. For example: when the switch indication information takes the value of '1', it indicates that the terminal device needs to generate a PDCP status report; when the value is '0', it indicates that the terminal device does not need to generate a PDCP status report.

[0115] Optionally, the high layer of the terminal device may refer to the RRC layer. It should be understood that the concept of the high layer of the terminal device mentioned later is consistent with this, and may also refer to the RRC layer. Correspondingly, the low layer of the terminal device mentioned later may refer to the MAC layer or the physical layer, which will not be repeated here.

[0116] Optionally, the RRC reconfiguration complete message may include logical number identification information or cell identification information associated with the conditional handover candidate cell on which the terminal device performs conditional handover. For example, if the terminal device determines to attempt to access the first conditional handover candidate cell based on the first information, the RRC reconfiguration complete message may include the logical number identification information or cell identification information of the first conditional handover candidate cell.

[0117] When the network device supports both RRC message triggered conditional switching and MAC CE / DCI message triggered conditional switching, in addition to sending a first message (RRC message) to the terminal device, the network device can also send a second message to the terminal device. Both the first message and the second message can be used to instruct the terminal device to access one of at least one conditional switching candidate cells.

[0118] Continuing with FIG4 , in some embodiments, the method shown in FIG4 may further include step S430. In step S430, the network device sends a second message to the terminal device, the second message being used to instruct the terminal device to switch to the third conditional handover candidate cell. Optionally, the second message is a MAC CE message or a DCI message.

[0119] It should be understood that the example of FIG4 is not intended to limit the order in which the first message and the second message are sent, that is, step S430 may be performed after step S410 or before step S410. In some embodiments, when the network device configures the configuration information associated with at least one conditional handover candidate cell through a first message (RRC message), the network device may carry the first information in the first message to instruct the terminal device to switch to the first conditional handover candidate cell; when the stored configuration information associated with at least one conditional handover candidate cell is not deleted, during the subsequent conditional handover process, the network device may instruct the terminal device to switch to the third conditional handover candidate cell at any time through a second message (MAC CE / DCI message). In some embodiments, when the configuration information associated with at least one conditional handover candidate cell is configured in advance, the network device may instruct the terminal device to switch to the third conditional handover candidate cell at any time through a second message (MAC CE / DCI message). Afterwards, if the network device needs to perform other configurations to the terminal device through an RRC message, the network device may also carry the first information in the RRC message to instruct the terminal device to switch to one of the at least one conditional handover candidate cell, such as the first conditional handover candidate cell.

[0120] In the case where the second message is a MAC CE message or a DCI message, after the terminal device receives the second message, it may further perform the following steps:

[0121] The lower layer of the terminal device transmits the second information to the upper layer, where the second information is information used to determine the association of the candidate cell for switching under the third condition;

[0122] The upper layer of the terminal device determines the third condition switching candidate cell according to the second information, and applies the cell configuration associated with the third condition switching candidate cell to switch to the third condition switching candidate cell.

[0123] As an implementation, the second information transmitted by the lower layer of the terminal device to the upper layer may be the complete information contained in the second message. For example, the second message may include configuration information associated with the third conditional handover candidate cell, such as the logical number identifier associated with the third conditional handover candidate cell, the handover condition associated with the third conditional handover candidate cell, the cell identifier associated with the third conditional handover candidate cell, the cell configuration associated with the third conditional handover candidate cell, etc. In this implementation, the lower layer of the terminal device may transmit all the configuration information contained in the second message to the upper layer.

[0124] As another implementation, the second information transmitted from the lower layer of the terminal device to the upper layer may be partial information contained in the second message, or identification information extracted from the second message. For example, the identification information may be a logical number identifier or cell identifier associated with the third conditional handover candidate cell extracted from the second message, and the extracted logical number identifier or cell identifier associated with the third conditional handover candidate cell is transmitted as the second information to the upper layer of the terminal device, so that the upper layer of the terminal device can determine the third conditional handover candidate cell.

[0125] As described above, in some embodiments, in addition to the network device being able to participate in triggering the conditional switch, the terminal device itself can also trigger the conditional switch based on the conditional switch evaluation task. In the case where the priority of the conditional switch triggered by the network device is higher than the priority of the conditional switch triggered by the terminal device, after the lower layer of the terminal device transmits the second information to the upper layer, the terminal device may also perform one or more of the following steps:

[0126] If the terminal device is executing a switching condition evaluation task related to the conditional switching, the terminal device stops the switching condition evaluation task related to the conditional switching being executed;

[0127] If the terminal device is preparing to attempt to access the fourth conditional handover candidate cell because the handover condition associated with at least one conditional handover candidate cell is satisfied, the terminal device abandons the attempt to access the fourth conditional handover candidate cell.

[0128] Optionally, as an implementation method, the network device may send an indication message to the terminal device, where the indication message is used to instruct the terminal device to stop the switching condition evaluation task related to the conditional switching being executed, so as to avoid a conflict between the way the network device triggers the conditional switching and the way the terminal device itself triggers the conditional switching through the switching condition evaluation task, or to save power for the terminal device (because the terminal device does not need to execute the switching condition evaluation task at any time). It should be noted that the above indication message may be included in the second message or in a fourth message, wherein the fourth message is a message different from the second message. For example, before the network device sends the second message to the terminal device, it may send a fourth message to the terminal device to instruct the terminal device to stop the switching condition evaluation task related to the conditional switching being executed.

[0129] In some embodiments, after the lower layer of the terminal device transmits the second information to the higher layer, the terminal device may further perform one or more of the following steps:

[0130] The terminal device sends an RRC reconfiguration complete message to the MN or SN to which it is connected;

[0131] The terminal device stops exchanging user data with the MN or SN to which it is connected;

[0132] The upper layer of the terminal device notifies the PDCP layer of the terminal device to generate a PDCP status report, and sends the PDCP status report to the MN connected to itself, or to the third condition handover candidate cell during the handover process;

[0133] The higher layer of the terminal device notifies the PDCP layer of the terminal device to perform a PDCP data recovery operation.

[0134] The first message is a MAC CE / DCI message

[0135] When the first message is a MAC CE / DCI message, it can be understood that the network device indicates the conditional handover candidate cell to be accessed by the terminal device through low-layer signaling. Considering the high transmission speed of low-layer signaling, the network device can indicate the conditional handover candidate cell at any time through MAC CE / DCI messages during the conditional handover process, which is highly flexible.

[0136] 5 , the process of the network device participating in the trigger condition switching when the first message is a MAC CE / DCI message will be described.

[0137] Referring to FIG. 5 , in step S510 , the network device sends a first message to the terminal device, where the first message is a MAC CE / DCI message.

[0138] The first message includes first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

[0139] In some embodiments, after the terminal device receives the first message sent by the network device, it can also execute step S520 and step S530.

[0140] In step S520, the lower layer of the terminal device transmits third information to the upper layer of the terminal device, where the third information is information for determining association with the first conditional switching candidate cell.

[0141] In some embodiments, the third information may be the complete information contained in the first message. In some embodiments, the third information may be partial information contained in the first message, or identification information extracted from the first message. For details about the third information, refer to the description of the second information above; the two are similar and will not be repeated here.

[0142] In some embodiments, the content included in the third information may be the same as the content included in the first information. For example, the terminal device may pass the first information included in the first message to the upper layer of the terminal device as the third information. In some embodiments, the content included in the third information may be part of the information in the first information. For example, after receiving the first information included in the first message, the terminal device may extract the identification information in the first information (for example, the logical number identification associated with the first conditional switching candidate cell, the cell identification, etc.), and pass the extracted identification information as the third information to the upper layer of the terminal device.

[0143] In step S530, the upper layer of the terminal device determines a first conditional handover candidate cell according to the third information, and applies the cell configuration associated with the first conditional handover candidate cell to switch to the first conditional handover candidate cell.

[0144] After the terminal device determines the first conditional switching candidate cell according to the third information, it can index the cell configuration associated with the first conditional switching candidate cell according to the content contained in the third information, and apply the cell configuration to access the first conditional switching candidate cell.

[0145] As described above, in some embodiments, in addition to the network device being able to participate in triggering the conditional switch, the terminal device itself can also trigger the conditional switch based on the conditional switch evaluation task. In the case where the priority of the conditional switch triggered by the network device is higher than the priority of the conditional switch triggered by the terminal device, after step S520, the terminal device may further perform one or more of the following steps:

[0146] If the terminal device is executing a switching condition evaluation task related to the conditional switching, the terminal device stops the switching condition evaluation task related to the conditional switching being executed;

[0147] If the terminal device is about to attempt to access the second conditional handover candidate cell because the handover condition associated with at least one conditional handover candidate cell is satisfied, the terminal device abandons the attempt to access the second conditional handover candidate cell.

[0148] In some embodiments, after step S520, the terminal device may further perform one or more of the following steps:

[0149] The terminal device sends an RRC reconfiguration complete message to the MN or SN to which it is connected;

[0150] The terminal device stops exchanging user data with the MN or SN to which it is connected;

[0151] The upper layer of the terminal device notifies the PDCP layer of the terminal device to generate a PDCP status report, and sends the PDCP status report to the MN connected to itself, or to the first conditional handover candidate cell during the handover process;

[0152] The higher layer of the terminal device notifies the PDCP layer of the terminal device to perform a PDCP data recovery operation.

[0153] In some embodiments, regardless of whether the first message is an RRC message or a MAC CE / DCI message, before the terminal device receives the first message sent by the network device, or before the terminal device receives the second message sent by the network device, the network device may send a third message to the terminal device, and the third message is used to configure the terminal device with configuration information associated with at least one conditional switching candidate cell. In some embodiments, the third message may also be referred to as a conditional switching configuration message or conditional switching configuration information. Configuration information associated with at least one conditional switching candidate cell may include one or more of the following information: a logical number identifier associated with the conditional switching candidate cell that needs to be added or modified; a switching condition associated with the conditional switching candidate cell that needs to be added or modified; a cell identifier associated with the conditional switching candidate cell that needs to be added or modified; a cell configuration associated with the conditional switching candidate cell that needs to be added or modified; and a logical number identifier associated with the conditional switching candidate cell that needs to be deleted. For detailed information on each information in the configuration information contained in the third message, please refer to the above description of the configuration parameter part of the configuration information associated with the conditional switching candidate cell, which will not be repeated here.

[0154] In some embodiments, the network device that sends the first message (or the second message) to the terminal device and the network device that sends the third message to the terminal device are the same network device. For example, in a CPAC scenario, the network device that sends the first message to the terminal device and the network device that sends the third message are both source PSCells. In a CHO scenario, the network device that sends the first message to the terminal device and the network device that sends the third message are both source PCells.

[0155] In some embodiments, the network device that sends the first message (or second message) to the terminal device and the network device that sends the third message to the terminal device are not the same network device. For example, in a CPAC scenario, the network device that sends the first message to the terminal device is the source PSCell, and the network device that sends the third message to the terminal device is the source PCell.

[0156] In some embodiments, after the terminal device stores the configuration information associated with at least one conditional switching candidate cell, it is still possible to receive a timely switching message or a reconfiguration message sent by the network device. The timely switching message or the reconfiguration message contains fourth information, and the fourth information is used to indicate whether the terminal device deletes the stored configuration information associated with at least one conditional switching candidate cell. As an implementation method, the fourth information can use one bit to indicate whether to delete the stored configuration information associated with at least one conditional switching candidate cell. For example, when the value is 0, it indicates deletion, and when the value is 1, it indicates non-deletion; or when it defaults to the default value, it indicates deletion, and when there is a value, it indicates non-deletion. It should be understood that the network device that sends the timely switching message or the reconfiguration message to the terminal device and the network device that sends the third message to the terminal device can be the same network device or different network devices.

[0157] It should be noted that the instant handover message may refer to a traditional handover message, which sends an instant handover command to a terminal device, allowing the terminal device to immediately perform an instant handover; or the instant handover message may refer to a reconfiguration message including synchronization reconfiguration information. The reconfiguration message may refer to a reconfiguration message without synchronization reconfiguration information.

[0158] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 5 , and the device embodiment of the present application is described in detail below in conjunction with Figures 6 to 8 . 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.

[0159] FIG6 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. The terminal device 600 shown in FIG6 includes: a first receiving unit 610.

[0160] The first receiving unit 610 is used to receive a first message sent by a network device, where the first message includes first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

[0161] Optionally, the first message is one or more of the following message types: RRC message; MAC CE message; or DCI message.

[0162] Optionally, when the first message is an RRC message, the terminal device also includes: a first determination unit 620, used to determine the first conditional switching candidate cell based on the first information, and apply the cell configuration associated with the first conditional switching candidate cell to switch to the first conditional switching candidate cell.

[0163] Optionally, when the first message is an RRC message, the terminal device further includes one or more of the following: a first stopping unit, for stopping the switching condition evaluation task related to conditional switching that is being executed if the terminal device is executing the switching condition evaluation task related to conditional switching; a first sending unit, for sending an RRC reconfiguration completion message to the main node MN or the secondary node SN connected to itself; a first access abandonment unit, for abandoning the attempt to access the second conditional switching candidate cell if the terminal device is preparing to attempt to access the second conditional switching candidate cell because the switching condition associated with at least one conditional switching candidate cell is met; a second stopping unit, for stopping exchanging user data with the MN or SN connected to itself; a first notification unit, for the higher layer of the terminal device to notify the packet data convergence protocol PDCP layer of the terminal device to generate a PDCP status report, and send the PDCP status report to the MN connected to itself or to the first conditional switching candidate cell during the switching process; a second notification unit, for the higher layer of the terminal device to notify the PDCP layer of the terminal device to perform a PDCP data recovery operation.

[0164] Optionally, the terminal device 600 further includes: a second receiving unit, configured to receive a second message sent by the network device, wherein the second message is configured to instruct the terminal device to switch to a third conditional switching candidate cell.

[0165] Optionally, the second message is a MAC CE message or a DCI message.

[0166] Optionally, the terminal device 600 further includes: a first transmission unit, configured to transmit second information from a lower layer of the terminal device to a higher layer of the terminal device, wherein the second information is information for determining association with the third conditional switching candidate cell.

[0167] Optionally, the terminal device 600 also includes: a second determination unit, which is used for the upper layer of the terminal device to determine the third condition switching candidate cell based on the second information, and apply the cell configuration associated with the third condition switching candidate cell to switch to the third condition switching candidate cell.

[0168] Optionally, the terminal device 600 also includes one or more of the following: a third stopping unit, used to stop the switching condition evaluation task related to conditional switching that is being executed if the terminal device is executing a switching condition evaluation task related to conditional switching; a second sending unit, used to send an RRC reconfiguration completion message to the MN or SN connected to itself; a second access abandonment unit, used to abandon the attempt to access the fourth conditional switching candidate cell if the terminal device is about to attempt to access the fourth conditional switching candidate cell because the switching condition associated with at least one conditional switching candidate cell is met; a fourth stopping unit, used to stop exchanging user data with the MN or SN connected to itself; a third notification unit, used for the upper layer of the terminal device to notify the PDCP layer of the terminal device to generate a PDCP status report, and send the PDCP status report to the MN connected to itself or to the third conditional switching candidate cell during the switching process; a fourth notification unit, used for the upper layer of the terminal device to notify the PDCP layer of the terminal device to perform a PDCP data recovery operation.

[0169] Optionally, when the first message is an RRC message, the first message also includes one or more of the following information: a logical number identifier associated with the conditional switching candidate cell that needs to be added or modified; a switching condition associated with the conditional switching candidate cell that needs to be added or modified; a cell identifier associated with the conditional switching candidate cell that needs to be added or modified; a cell configuration associated with the conditional switching candidate cell that needs to be added or modified; and a logical number identifier associated with the conditional switching candidate cell that needs to be deleted.

[0170] Optionally, when the first message is a MAC CE message or a DCI message, the terminal device further includes: a second transmission unit, used for the lower layer of the terminal device to transmit third information to the higher layer of the terminal device, and the third information is information used to determine the association of the first conditional switching candidate cell.

[0171] Optionally, the terminal device 600 also includes: a third determination unit, which is used for the upper layer of the terminal device to determine the first conditional switching candidate cell based on the third information, and apply the cell configuration associated with the first conditional switching candidate cell to switch to the first conditional switching candidate cell.

[0172] Optionally, the terminal device 600 also includes one or more of the following: a fifth stopping unit, for stopping the switching condition evaluation task related to conditional switching that is being executed if the terminal device is executing the switching condition evaluation task related to conditional switching; a third sending unit, for sending an RRC reconfiguration completion message to the MN or SN connected to itself; a third access abandonment unit, for abandoning the attempt to access the second conditional switching candidate cell if the terminal device is preparing to attempt to access the second conditional switching candidate cell because the switching condition associated with at least one conditional switching candidate cell is met; a sixth stopping unit, for stopping exchanging user data with the MN or SN connected to itself; a fifth notification unit, for the upper layer of the terminal device to notify the PDCP layer of the terminal device to generate a PDCP status report, and send the PDCP status report to the MN connected to itself or to the first conditional switching candidate cell during the switching process; a sixth notification unit, for the upper layer of the terminal device to notify the PDCP layer of the terminal device to perform a PDCP data recovery operation.

[0173] Optionally, the upper layer of the terminal device is the RRC layer, and the lower layer of the terminal device is the MAC layer or the physical layer.

[0174] Optionally, the terminal device 600 further includes: a third receiving unit, configured to receive a third message sent by the network device, where the third message is used to configure configuration information associated with at least one conditional switching candidate cell.

[0175] Optionally, the configuration information associated with at least one conditional switching candidate cell includes one or more of the following information: a logical number identifier associated with the conditional switching candidate cell that needs to be added or modified; a switching condition associated with the conditional switching candidate cell that needs to be added or modified; a cell identifier associated with the conditional switching candidate cell that needs to be added or modified; a cell configuration associated with the conditional switching candidate cell that needs to be added or modified; and a logical number identifier associated with the conditional switching candidate cell that needs to be deleted.

[0176] Optionally, the terminal device 600 further includes: a fourth receiving unit, configured to receive indication information sent by a network device, wherein the indication information is used to instruct the terminal device to stop a switching condition evaluation task related to conditional switching being executed.

[0177] Optionally, the terminal device 600 also includes: a fifth receiving unit, used to receive a timely switching message or a reconfiguration message sent by a network device, wherein the timely switching message or the reconfiguration message contains fourth information, and the fourth information is used to indicate whether the terminal device deletes the stored configuration information associated with at least one conditional switching candidate cell.

[0178] Optionally, the terminal device 600 also includes: a fourth sending unit, used to send capability indication information to the network device, wherein the capability indication information is used to indicate one or more of the following capabilities: whether the terminal device supports continuous conditional switching function; whether the terminal device supports conditional switching function triggered based on the network device; whether the terminal device supports conditional switching function triggered based on the RRC layer of the network device; whether the terminal device supports conditional switching function triggered based on the MAC layer or physical layer of the network device.

[0179] FIG7 is a schematic diagram of the structure of a network device provided in an embodiment of the present application. The network device 700 shown in FIG7 includes: a first sending unit 710.

[0180] The first sending unit 710 is used to send a first message to a terminal device, where the first message includes first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

[0181] Optionally, the first message is one or more of the following message types: RRC message; MAC CE message; or DCI message.

[0182] Optionally, the network device 700 further includes: a second sending unit 720, configured to send a second message to the terminal device, where the second message is used to instruct the terminal device to switch to a third conditional switching candidate cell.

[0183] Optionally, the second message is a MAC CE message or a DCI message.

[0184] Optionally, when the first message is an RRC message, the first message also includes one or more of the following information: a logical number identifier associated with the conditional switching candidate cell that needs to be added or modified; a switching condition associated with the conditional switching candidate cell that needs to be added or modified; a cell identifier associated with the conditional switching candidate cell that needs to be added or modified; a cell configuration associated with the conditional switching candidate cell that needs to be added or modified; and a logical number identifier associated with the conditional switching candidate cell that needs to be deleted.

[0185] Optionally, the network device 700 further includes: a third sending unit, configured to send a third message to the terminal device, wherein the third message is used to configure configuration information associated with at least one conditional switching candidate cell.

[0186] Optionally, the configuration information associated with at least one conditional switching candidate cell includes one or more of the following information: a logical number identifier associated with the conditional switching candidate cell that needs to be added or modified; a switching condition associated with the conditional switching candidate cell that needs to be added or modified; a cell identifier associated with the conditional switching candidate cell that needs to be added or modified; a cell configuration associated with the conditional switching candidate cell that needs to be added or modified; and a logical number identifier associated with the conditional switching candidate cell that needs to be deleted.

[0187] Optionally, the network device 700 further includes: a fourth sending unit, configured to send indication information to the terminal device, wherein the indication information is used to instruct the terminal device to stop a switching condition evaluation task related to conditional switching being executed.

[0188] Optionally, the network device 700 also includes: a fifth sending unit, used to send a timely switching message or a reconfiguration message to the terminal device, the timely switching message or the reconfiguration message contains fourth information, and the fourth information is used to indicate whether the terminal device deletes the stored configuration information associated with at least one conditional switching candidate cell.

[0189] Optionally, the network device 700 also includes: a receiving unit, used to receive capability indication information sent by the terminal device, the capability indication information is used to indicate one or more of the following capabilities: whether the terminal device supports continuous conditional switching function; whether the terminal device supports conditional switching function based on network device triggering; whether the terminal device supports conditional switching function based on network device RRC layer triggering; whether the terminal device supports conditional switching function based on network device MAC layer or physical layer triggering.

[0190] Figure 8 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 8 indicate that the unit or module is optional. The device 800 may be used to implement the method described in the above method embodiment. The device 800 may be a chip, a terminal device, or a network device.

[0191] The device 800 may include one or more processors 810. The processor 810 may support the device 800 to implement the method described in the method embodiment above. The processor 810 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, a discrete gate or transistor logic device, a discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0192] The apparatus 800 may further include one or more memories 820. The memories 820 store programs that can be executed by the processor 810, causing the processor 810 to perform the methods described in the above method embodiments. The memories 820 may be independent of the processor 810 or integrated into the processor 810.

[0193] The apparatus 800 may further include a transceiver 830. The processor 810 may communicate with other devices or chips via the transceiver 830. For example, the processor 810 may transmit and receive data with other devices or chips via the transceiver 830.

[0194] 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 or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0195] 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 or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0196] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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)).

[0209] 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 wireless communication method, characterized in that: include: The terminal device receives a first message sent by a network device, where the first message includes first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

2. The method according to claim 1, characterized in that The first message is one or more of the following message types: Radio Resource Control RRC message; Media Access Control Element MAC CE message; or Downlink control information DCI message.

3. The method according to claim 1 or 2, characterized in that When the first message is an RRC message, after the terminal device receives the first message sent by the network device, the method further includes: The terminal device determines the first conditional switching candidate cell according to the first information, and applies the cell configuration associated with the first conditional switching candidate cell to switch to the first conditional switching candidate cell.

4. The method according to any one of claims 1 to 3, characterized in that When the first message is an RRC message, after the terminal device receives the first message sent by the network device, the method further includes one or more of the following steps: If the terminal device is executing a switching condition evaluation task related to conditional switching, the terminal device stops the switching condition evaluation task related to conditional switching being executed; The terminal device sends an RRC reconfiguration completion message to the master node MN or the secondary node SN to which it is connected; If the terminal device is preparing to attempt to access the second conditional handover candidate cell because the handover condition associated with at least one conditional handover candidate cell is satisfied, the terminal device abandons the attempt to access the second conditional handover candidate cell; The terminal device stops exchanging user data with the MN or SN connected to it; The upper layer of the terminal device notifies the Packet Data Convergence Protocol (PDCP) layer of the terminal device to generate a PDCP status report, and sends the PDCP status report to the MN connected to the terminal device or to the first conditional handover candidate cell during the handover process; The higher layer of the terminal device notifies the PDCP layer of the terminal device to perform a PDCP data recovery operation.

5. The method according to any one of claims 1 to 4, characterized in that The method further comprises: The terminal device receives a second message sent by the network device, where the second message is used to instruct the terminal device to switch to a third conditional switching candidate cell.

6. The method according to claim 5, characterized in that The second message is a MAC CE message or a DCI message.

7. The method according to claim 6, characterized in that After the terminal device receives the second message sent by the network device, the method further includes: The lower layer of the terminal device transmits second information to the upper layer of the terminal device, where the second information is information used to determine the association of the third conditional switching candidate cell.

8. The method according to claim 7, characterized in that After the lower layer of the terminal device transmits the second information to the upper layer of the terminal device, the method further includes: The upper layer of the terminal device determines the third condition switching candidate cell according to the second information, and applies the cell configuration associated with the third condition switching candidate cell to switch to the third condition switching candidate cell.

9. The method according to claim 7 or 8, characterized in that After the lower layer of the terminal device transmits the second information to the upper layer of the terminal device, the method further includes one or more of the following steps: If the terminal device is executing a switching condition evaluation task related to conditional switching, the terminal device stops the switching condition evaluation task related to conditional switching being executed; The terminal device sends an RRC reconfiguration completion message to the MN or SN to which it is connected; If the terminal device is preparing to attempt to access a fourth conditional handover candidate cell because a handover condition associated with at least one conditional handover candidate cell is satisfied, the terminal device abandons attempting to access the fourth conditional handover candidate cell; The terminal device stops exchanging user data with the MN or SN connected to it; The upper layer of the terminal device notifies the PDCP layer of the terminal device to generate a PDCP status report, and sends the PDCP status report to the MN connected to itself or to the third condition handover candidate cell during the handover process; The higher layer of the terminal device notifies the PDCP layer of the terminal device to perform a PDCP data recovery operation.

10. The method according to any one of claims 1 to 9, characterized in that When the first message is an RRC message, the first message further includes one or more of the following information: The logical number identifier associated with the conditional handover candidate cell that needs to be added or modified; The handover conditions associated with the conditional handover candidate cells that need to be added or modified; The cell identifier associated with the conditional handover candidate cell that needs to be added or modified; The cell configuration associated with the conditional switching candidate cell that needs to be added or modified; The logical number identifier associated with the conditional handover candidate cell that needs to be deleted.

11. The method according to claim 1 or 2, characterized in that When the first message is a MAC CE message or a DCI message, after the terminal device receives the first message sent by the network device, the method further includes: The lower layer of the terminal device transmits third information to the upper layer of the terminal device, where the third information is information used to determine the association with the first conditional switching candidate cell.

12. The method according to claim 11, characterized in that After the lower layer of the terminal device transmits the third information to the upper layer of the terminal device, the method further includes: The upper layer of the terminal device determines the first conditional switching candidate cell according to the third information, and applies the cell configuration associated with the first conditional switching candidate cell to switch to the first conditional switching candidate cell.

13. The method according to claim 11 or 12, characterized in that After the lower layer of the terminal device transmits the third information to the upper layer of the terminal device, the method further includes one or more of the following steps: If the terminal device is executing a switching condition evaluation task related to conditional switching, the terminal device stops the switching condition evaluation task related to conditional switching being executed; The terminal device sends an RRC reconfiguration completion message to the MN or SN to which it is connected; If the terminal device is preparing to attempt to access the second conditional handover candidate cell because the handover condition associated with at least one conditional handover candidate cell is satisfied, the terminal device abandons the attempt to access the second conditional handover candidate cell; The terminal device stops exchanging user data with the MN or SN connected to it; The upper layer of the terminal device notifies the PDCP layer of the terminal device to generate a PDCP status report, and sends the PDCP status report to the MN connected to itself or to the first conditional handover candidate cell during the handover process; The higher layer of the terminal device notifies the PDCP layer of the terminal device to perform a PDCP data recovery operation.

14. The method according to any one of claims 4 to 13, characterized in that The upper layer of the terminal device is the RRC layer, and the lower layer of the terminal device is the MAC layer or the physical layer.

15. The method according to any one of claims 1 to 9 or 11 to 14, characterized in that The method further comprises: The terminal device receives a third message sent by the network device, where the third message is used to configure configuration information associated with at least one conditional switching candidate cell.

16. The method according to claim 15, characterized in that The configuration information associated with the at least one conditional handover candidate cell includes one or more of the following information: The logical number identifier associated with the conditional handover candidate cell that needs to be added or modified; The handover conditions associated with the conditional handover candidate cells that need to be added or modified; The cell identifier associated with the conditional handover candidate cell that needs to be added or modified; The cell configuration associated with the conditional switching candidate cell that needs to be added or modified; The logical number identifier associated with the conditional handover candidate cell that needs to be deleted.

17. The method according to any one of claims 1 to 16, characterized in that The method further comprises: The terminal device receives indication information sent by the network device, where the indication information is used to instruct the terminal device to stop a switching condition evaluation task related to conditional switching being executed.

18. The method according to any one of claims 1 to 17, characterized in that The method further comprises: The terminal device receives a timely switching message or a reconfiguration message sent by the network device, where the timely switching message or the reconfiguration message includes fourth information, and the fourth information is used to indicate whether the terminal device deletes the stored configuration information associated with at least one conditional switching candidate cell.

19. The method according to any one of claims 1 to 18, characterized in that The method further comprises: The terminal device sends capability indication information to the network device, where the capability indication information is used to indicate one or more of the following capabilities: Whether the terminal device supports the continuous conditional switching function; Whether the terminal device supports the conditional switching function triggered by the network device; Whether the terminal device supports the conditional switching function triggered by the RRC layer of the network device; Whether the terminal device supports conditional switching function triggered by the MAC layer or physical layer of the network device.

20. A wireless communication method, characterized in that: include: The network device sends a first message to the terminal device, where the first message includes first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

21. The method according to claim 20, characterized in that The first message is one or more of the following message types: Radio Resource Control RRC message; Media Access Control Element MAC CE message; or Downlink control information DCI message.

22. The method according to claim 20 or 21, characterized in that The method further comprises: The network device sends a second message to the terminal device, where the second message is used to instruct the terminal device to switch to a third conditional switching candidate cell.

23. The method according to claim 22, characterized in that The second message is a MAC CE message or a DCI message.

24. The method according to any one of claims 20 to 23, characterized in that When the first message is an RRC message, the first message further includes one or more of the following information: The logical number identifier associated with the conditional handover candidate cell that needs to be added or modified; The handover conditions associated with the conditional handover candidate cells that need to be added or modified; The cell identifier associated with the conditional handover candidate cell that needs to be added or modified; The cell configuration associated with the conditional switching candidate cell that needs to be added or modified; The logical number identifier associated with the conditional handover candidate cell that needs to be deleted.

25. The method according to any one of claims 20 to 23, characterized in that The method further comprises: The network device sends a third message to the terminal device, where the third message is used to configure configuration information associated with at least one conditional switching candidate cell.

26. The method according to claim 25, characterized in that The configuration information associated with the at least one conditional handover candidate cell includes one or more of the following information: The logical number identifier associated with the conditional handover candidate cell that needs to be added or modified; The handover conditions associated with the conditional handover candidate cells that need to be added or modified; The cell identifier associated with the conditional handover candidate cell that needs to be added or modified; The cell configuration associated with the conditional switching candidate cell that needs to be added or modified; The logical number identifier associated with the conditional handover candidate cell that needs to be deleted.

27. The method according to any one of claims 20 to 26, characterized in that The method further comprises: The network device sends instruction information to the terminal device, where the instruction information is used to instruct the terminal device to stop the switching condition evaluation task related to the conditional switching being executed.

28. The method according to any one of claims 20 to 27, characterized in that The method further comprises: The network device sends a timely switching message or a reconfiguration message to the terminal device, where the timely switching message or the reconfiguration message includes fourth information, and the fourth information is used to instruct the terminal device whether to delete the stored configuration information associated with at least one conditional switching candidate cell.

29. The method according to any one of claims 20 to 28, wherein The method further comprises: The network device receives capability indication information sent by the terminal device, where the capability indication information is used to indicate one or more of the following capabilities: Whether the terminal device supports the continuous conditional switching function; Whether the terminal device supports the conditional switching function triggered by the network device; Whether the terminal device supports the conditional switching function triggered by the RRC layer of the network device; Whether the terminal device supports conditional switching function triggered by the MAC layer or physical layer of the network device.

30. A terminal device, characterized in that: include: The first receiving unit is used to receive a first message sent by a network device, where the first message includes first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

31. The terminal device according to claim 30, characterized in that The first message is one or more of the following message types: Radio Resource Control RRC message; Media Access Control Element MAC CE message; or Downlink control information DCI message.

32. The terminal device according to claim 30 or 31, characterized in that: When the first message is an RRC message, the terminal device further includes: A first determining unit is configured to determine the first conditional handover candidate cell according to the first information, and apply the cell configuration associated with the first conditional handover candidate cell to handover to the first conditional handover candidate cell.

33. The terminal device according to any one of claims 30 to 32, characterized in that: When the first message is an RRC message, the terminal device further includes one or more of the following: a first stopping unit, configured to stop the switching condition evaluation task related to the conditional switching if the terminal device is executing the switching condition evaluation task related to the conditional switching; A first sending unit is configured to send an RRC reconfiguration completion message to the master node MN or the secondary node SN to which it is connected; A first access abandoning unit is configured to abandon attempting to access a second conditional handover candidate cell if the terminal device is preparing to attempt to access the second conditional handover candidate cell because a handover condition associated with at least one conditional handover candidate cell is satisfied; A second stopping unit is used to stop exchanging user data with the MN or SN connected to itself; a first notification unit, configured for the upper layer of the terminal device to notify the Packet Data Convergence Protocol (PDCP) layer of the terminal device to generate a PDCP status report, and to send the PDCP status report to the MN connected to the terminal device or to the first conditional handover candidate cell during a handover process; The second notification unit is used for the upper layer of the terminal device to notify the PDCP layer of the terminal device to perform a PDCP data recovery operation.

34. The terminal device according to any one of claims 30 to 33, characterized in that: The terminal device further includes: The second receiving unit is used to receive a second message sent by the network device, where the second message is used to instruct the terminal device to switch to a third conditional switching candidate cell.

35. The terminal device according to claim 34, characterized in that The second message is a MAC CE message or a DCI message.

36. The terminal device according to claim 35, characterized in that The terminal device further includes: The first transmission unit is used to transmit second information from the lower layer of the terminal device to the upper layer of the terminal device, where the second information is information used to determine the association of the third conditional switching candidate cell.

37. The terminal device according to claim 36, characterized in that The terminal device further includes: The second determining unit is used for the upper layer of the terminal device to determine the third condition switching candidate cell according to the second information, and apply the cell configuration associated with the third condition switching candidate cell to switch to the third condition switching candidate cell.

38. The terminal device according to claim 36 or 37, characterized in that: The terminal device further includes one or more of the following: a third stopping unit, configured to stop the switching condition evaluation task related to the conditional switching if the terminal device is executing the switching condition evaluation task related to the conditional switching; The second sending unit is configured to send an RRC reconfiguration completion message to the MN or SN connected to itself; a second access abandoning unit, configured to abandon attempting to access a fourth conditional handover candidate cell if the terminal device is preparing to attempt to access the fourth conditional handover candidate cell because a handover condition associated with at least one conditional handover candidate cell is satisfied; A fourth stopping unit, configured to stop the MN or SN connected to the MN from exchanging user data; a third notification unit, configured for the upper layer of the terminal device to notify the PDCP layer of the terminal device to generate a PDCP status report, and to send the PDCP status report to the MN connected to the terminal device or to the third conditional handover candidate cell during the handover process; The fourth notification unit is used for the upper layer of the terminal device to notify the PDCP layer of the terminal device to perform a PDCP data recovery operation.

39. The terminal device according to any one of claims 30 to 38, characterized in that: When the first message is an RRC message, the first message further includes one or more of the following information: The logical number identifier associated with the conditional handover candidate cell that needs to be added or modified; The handover conditions associated with the conditional handover candidate cells that need to be added or modified; The cell identifier associated with the conditional handover candidate cell that needs to be added or modified; The cell configuration associated with the conditional switching candidate cell that needs to be added or modified; The logical number identifier associated with the conditional handover candidate cell that needs to be deleted.

40. The terminal device according to claim 30 or 31, characterized in that: When the first message is a MAC CE message or a DCI message, the terminal device further includes: The second transmission unit is used to transmit third information from the lower layer of the terminal device to the higher layer of the terminal device, where the third information is information used to determine the association with the first conditional switching candidate cell.

41. The terminal device according to claim 40, characterized in that The terminal device further includes: A third determining unit is used for a higher layer of the terminal device to determine the first conditional switching candidate cell according to the third information, and apply the cell configuration associated with the first conditional switching candidate cell to switch to the first conditional switching candidate cell.

42. The terminal device according to claim 40 or 41, characterized in that: The terminal device further includes one or more of the following: a fifth stopping unit, configured to stop the switching condition evaluation task related to the conditional switching if the terminal device is executing the switching condition evaluation task related to the conditional switching; The third sending unit is configured to send an RRC reconfiguration completion message to the MN or SN connected to itself; a third access abandoning unit, configured to abandon attempting to access a second conditional handover candidate cell if the terminal device is preparing to attempt to access the second conditional handover candidate cell because a handover condition associated with at least one conditional handover candidate cell is satisfied; A sixth stopping unit, configured to stop exchanging user data with the MN or SN connected to the MN; A fifth notification unit, configured for the upper layer of the terminal device to notify the PDCP layer of the terminal device to generate a PDCP status report, and to send the PDCP status report to the MN connected to the terminal device or to the first conditional handover candidate cell during the handover process; The sixth notification unit is used for the upper layer of the terminal device to notify the PDCP layer of the terminal device to perform a PDCP data recovery operation.

43. The terminal device according to any one of claims 33 to 42, characterized in that: The upper layer of the terminal device is the RRC layer, and the lower layer of the terminal device is the MAC layer or the physical layer.

44. The terminal device according to any one of claims 30-38 or 40-43, characterized in that: The terminal device further includes: The third receiving unit is configured to receive a third message sent by the network device, where the third message is used to configure configuration information associated with at least one conditional handover candidate cell.

45. The terminal device according to claim 44, characterized in that The configuration information associated with the at least one conditional handover candidate cell includes one or more of the following information: The logical number identifier associated with the conditional handover candidate cell that needs to be added or modified; The handover conditions associated with the conditional handover candidate cells that need to be added or modified; The cell identifier associated with the conditional handover candidate cell that needs to be added or modified; The cell configuration associated with the conditional switching candidate cell that needs to be added or modified; The logical number identifier associated with the conditional handover candidate cell that needs to be deleted.

46. ​​The terminal device according to any one of claims 30 to 45, characterized in that: The terminal device further includes: The fourth receiving unit is used to receive the indication information sent by the network device, where the indication information is used to instruct the terminal device to stop the switching condition evaluation task related to the conditional switching being executed.

47. The terminal device according to any one of claims 30 to 46, characterized in that: The terminal device further includes: The fifth receiving unit is used to receive a timely switching message or a reconfiguration message sent by the network device, wherein the timely switching message or the reconfiguration message contains fourth information, and the fourth information is used to indicate whether the terminal device deletes the configuration information associated with at least one conditional switching candidate cell stored.

48. The terminal device according to any one of claims 30 to 47, characterized in that: The terminal device further includes: A fourth sending unit is configured to send capability indication information to the network device, where the capability indication information is used to indicate one or more of the following capabilities: Whether the terminal device supports the continuous conditional switching function; Whether the terminal device supports the conditional switching function triggered by the network device; Whether the terminal device supports the conditional switching function triggered by the RRC layer of the network device; Whether the terminal device supports conditional switching function triggered by the MAC layer or physical layer of the network device.

49. A network device, characterized in that include: The first sending unit is used to send a first message to the terminal device, where the first message includes first information, and the first information is used to instruct the terminal device to switch to a first conditional switching candidate cell.

50. The network device according to claim 49, wherein: The first message is one or more of the following message types: Radio Resource Control RRC message; Media Access Control Element MAC CE message; or Downlink control information DCI message.

51. The network device according to claim 49 or 50, characterized in that The network device further includes: The second sending unit is used to send a second message to the terminal device, where the second message is used to instruct the terminal device to switch to a third conditional switching candidate cell.

52. The network device according to claim 51, wherein: The second message is a MAC CE message or a DCI message.

53. The network device according to any one of claims 49 to 52, characterized in that: When the first message is an RRC message, the first message further includes one or more of the following information: The logical number identifier associated with the conditional handover candidate cell that needs to be added or modified; The handover conditions associated with the conditional handover candidate cells that need to be added or modified; The cell identifier associated with the conditional handover candidate cell that needs to be added or modified; The cell configuration associated with the conditional switching candidate cell that needs to be added or modified; The logical number identifier associated with the conditional handover candidate cell that needs to be deleted.

54. The network device according to any one of claims 49 to 52, characterized in that: The network device further includes: The third sending unit is used to send a third message to the terminal device, where the third message is used to configure configuration information associated with at least one conditional switching candidate cell.

55. The network device according to claim 54, characterized in that The configuration information associated with the at least one conditional handover candidate cell includes one or more of the following information: The logical number identifier associated with the conditional handover candidate cell that needs to be added or modified; The handover conditions associated with the conditional handover candidate cells that need to be added or modified; The cell identifier associated with the conditional handover candidate cell that needs to be added or modified; The cell configuration associated with the conditional switching candidate cell that needs to be added or modified; The logical number identifier associated with the conditional handover candidate cell that needs to be deleted.

56. The network device according to any one of claims 49 to 55, characterized in that: The network device further includes: The fourth sending unit is used to send indication information to the terminal device, where the indication information is used to instruct the terminal device to stop the switching condition evaluation task related to the conditional switching being executed.

57. The network device according to any one of claims 49 to 56, characterized in that: The network device further includes: The fifth sending unit is used to send a timely switching message or a reconfiguration message to the terminal device, and the timely switching message or the reconfiguration message contains fourth information, and the fourth information is used to indicate whether the terminal device deletes the configuration information associated with at least one conditional switching candidate cell stored.

58. The network device according to any one of claims 49 to 57, characterized in that: The network device further includes: A receiving unit is configured to receive capability indication information sent by the terminal device, where the capability indication information is used to indicate one or more of the following capabilities: Whether the terminal device supports the continuous conditional switching function; Whether the terminal device supports the conditional switching function triggered by the network device; Whether the terminal device supports the conditional switching function triggered by the RRC layer of the network device; Whether the terminal device supports conditional switching function triggered by the MAC layer or physical layer of the network device.

59. A terminal device, characterized in that: The terminal device comprises a memory, a processor and a transceiver, 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 19.

60. A network device, characterized in that The device comprises a memory, a processor and a transceiver, wherein the memory is used to store a program, and the processor is used to call the program in the memory so that the network device executes the method according to any one of claims 20 to 29.

61. 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 29.

62. 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 29.

63. 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 29.

64. 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 29.

65. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 29.

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