WO2022188890A1

WO2022188890A1 - Conditional handover method, apparatus and device, and storage medium

Info

Publication number: WO2022188890A1
Application number: PCT/CN2022/080747
Authority: WO
Inventors: 刘潇蔓; 谢芳; 唐晓璇; 陈宁宇
Original assignee: ***通信有限公司研究院; ***通信集团有限公司
Priority date: 2021-03-12
Filing date: 2022-03-14
Publication date: 2022-09-15
Also published as: CN115087054A

Abstract

Embodiments of the present application provide a conditional handover method, apparatus and device, and a storage medium. The method comprises: when a terminal in a dual-connectivity mode performs a conditional handover, the terminal is handed over from a first master base station to a second master base station; the terminal obtains a candidate cell list, and sends the candidate cell list to the second master base station, the candidate cell list representing a secondary cell group configured when a first secondary base station configures a conditional PScell change (CPC) configuration on the terminal, wherein the candidate cell list is used for the second master base station to establish a communication interface with each cell in the candidate cell list when the second master base station reserves the first secondary base station, so that the second master base station and the first secondary base station together provide dual-connectivity services for the terminal.

Description

条件切换方法、装置、设备及存储介质Conditional switching method, apparatus, device and storage medium

相关申请的交叉引用CROSS-REFERENCE TO RELATED APPLICATIONS

本申请基于申请号为202110271756.X、申请日为2021年03月12日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此以全文引入的方式引入本申请。This application is based on the Chinese patent application with the application number 202110271756.X and the filing date on March 12, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by way of full-text introduction this application.

技术领域technical field

本申请实施例涉及无线技术领域，尤其涉及一种条件切换方法、装置、设备及存储介质。The embodiments of the present application relate to the field of wireless technologies, and in particular, to a condition switching method, apparatus, device, and storage medium.

背景技术Background technique

目前，随着通信技术的快速发展，当终端从一个小区移动到另外一个小区时，为了保证终端的通信质量，可以对终端进行切换控制。实际应用时，可以为终端配置条件切换，这样，当满足条件切换配置的门限时，终端可以主动向目标基站发起随机接入过程而无需触发测量上报等待网络下发切换命令。但是，针对处于双连接模式的终端，当发起条件切换后可能会导致切换后的基站无法及时向终端提供双连接服务。At present, with the rapid development of communication technology, when a terminal moves from one cell to another cell, in order to ensure the communication quality of the terminal, handover control of the terminal can be performed. In practical applications, conditional handover can be configured for the terminal, so that when the threshold configured for conditional handover is met, the terminal can actively initiate a random access procedure to the target base station without triggering measurement reporting and waiting for the network to issue a handover command. However, for a terminal in a dual connectivity mode, after a conditional handover is initiated, the base station after the handover may not be able to provide the dual connectivity service to the terminal in time.

发明内容SUMMARY OF THE INVENTION

有鉴于此，本申请实施例期望提供一种条件切换方法、装置、设备及存储介质。In view of this, the embodiments of the present application are expected to provide a condition switching method, apparatus, device, and storage medium.

本申请实施例的技术方案是这样实现的：The technical solutions of the embodiments of the present application are implemented as follows:

本申请的至少一个实施例提供了一种条件切换方法，所述方法包括：At least one embodiment of the present application provides a conditional switching method, the method comprising:

当处于双连接模式的终端执行条件切换时，所述终端由第一主基站切换至第二主基站；When the terminal in the dual connection mode performs the conditional handover, the terminal is handed over from the first main base station to the second main base station;

所述终端获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；所述候选小区列表表征第一辅基站对所述终端进行有条件的PScell 改变(CPC，Conditional Pscell Change)配置时配置的辅小区组；The terminal acquires a list of candidate cells, and sends the list of candidate cells to the second primary base station; the list of candidate cells represents that the first secondary base station performs a conditional PScell change (CPC, Conditional Pscell Change) on the terminal. ) the secondary cell group configured during configuration;

其中，所述候选小区列表用于供所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。The candidate cell list is used for the second master base station to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second master base station can communicate with each other. The first secondary base station jointly provides a dual connectivity service for the terminal.

此外，根据本申请的至少一个实施例，所述将所述候选小区列表发送给所述第二主基站，包括：In addition, according to at least one embodiment of the present application, the sending the candidate cell list to the second master base station includes:

所述终端将所述候选小区列表携带于第一信息中；carrying, by the terminal, the candidate cell list in the first information;

所述终端将所述第一信息发送给所述第二主基站。The terminal sends the first information to the second primary base station.

此外，根据本申请的至少一个实施例，所述当处于双连接模式的终端执行条件切换时，所述终端由第一主基站切换至第二主基站，包括：In addition, according to at least one embodiment of the present application, when the terminal in the dual connectivity mode performs conditional handover, the terminal is switched from the first primary base station to the second primary base station, including:

所述终端接收所述第一主基站发送的条件切换配置；receiving, by the terminal, a conditional handover configuration sent by the first primary base station;

所述终端从多个条件切换候选小区中确定满足所述条件切换配置中执行条件的多个候选小区；The terminal determines, from a plurality of conditional handover candidate cells, a plurality of candidate cells that satisfy the execution conditions in the conditional handover configuration;

所述终端从所述多个候选小区中选择目标小区，以接入第二主基站。The terminal selects a target cell from the plurality of candidate cells to access the second primary base station.

此外，根据本申请的至少一个实施例，所述方法还包括：In addition, according to at least one embodiment of the present application, the method further includes:

所述终端接入第二主基站的过程中，不释放所述CPC配置。During the process of accessing the second primary base station by the terminal, the CPC configuration is not released.

所述终端接收所述第二主基站发送的更新后的候选小区列表；其中，所述更新后的候选小区列表是当所述第二主基站被拒绝与候选小区列表中小区建立通信接口时，对CPC配置进行更新得到的；The terminal receives the updated candidate cell list sent by the second master base station; wherein, the updated candidate cell list is when the second master base station refuses to establish a communication interface with a cell in the candidate cell list, Obtained by updating the CPC configuration;

和/或，and / or,

所述终端接收所述第二主基站发送的更新后的随机接入配置；其中，所述随机接入配置是所述候选小区列表中与所述第二主基站建立通信接口的至少一个小区为所述终端预留的随机接入资源进行更新得到的。The terminal receives the updated random access configuration sent by the second master base station; wherein, the random access configuration is that at least one cell in the candidate cell list that establishes a communication interface with the second master base station is: Obtained by updating the random access resources reserved by the terminal.

本申请的至少一个实施例提供一种条件切换方法，所述方法包括：At least one embodiment of the present application provides a conditional switching method, the method comprising:

当处于双连接模式的终端执行条件切换由第一主基站切换至第二主基站时，所述第二主基站从第一辅基站获取候选小区列表；所述候选小区列表表征所述第一辅基站对所述终端进行CPC配置时配置的辅小区组；When a terminal in dual connectivity mode performs a conditional handover from the first primary base station to the second primary base station, the second primary base station acquires a list of candidate cells from the first secondary base station; the candidate cell list represents the first secondary base station a secondary cell group configured when the base station performs CPC configuration on the terminal;

此外，根据本申请的至少一个实施例，所述第二主基站从第一辅基站获取候选小区列表，包括以下之一：In addition, according to at least one embodiment of the present application, the second primary base station acquires a candidate cell list from the first secondary base station, including one of the following:

在所述终端切换至所述第二主基站后，所述第二主基站向所述第一辅基站发送第二信息；所述第二信息用于指示所述第一辅基站向所述第二主基站发送所述候选小区列表；所述第二主基站接收所述第一辅基站发送的候选小区列表；After the terminal switches to the second primary base station, the second primary base station sends second information to the first secondary base station; the second information is used to instruct the first secondary base station to send the first secondary base station to the first secondary base station. The second master base station sends the candidate cell list; the second master base station receives the candidate cell list sent by the first secondary base station;

在所述终端切换至所述第二主基站后，所述第二主基站接收所述第一辅基站发送的候选小区列表。After the terminal switches to the second master base station, the second master base station receives the candidate cell list sent by the first secondary base station.

所述第二主基站向所述终端发送更新后的候选小区列表；其中，所述更新后的候选小区列表是当所述第二主基站被拒绝与候选小区列表中小区建立通信接口时，对CPC配置进行更新得到的；The second main base station sends the updated candidate cell list to the terminal; wherein, the updated candidate cell list is a response to when the second main base station refuses to establish a communication interface with a cell in the candidate cell list. Obtained by updating the CPC configuration;

和/或，and / or,

所述第二主基站向所述终端发送更新后的随机接入配置；其中，所述随机接入配置是所述候选小区列表中与所述第二主基站建立通信接口的至少一个小区为所述终端预留的随机接入资源进行更新得到的。The second master base station sends the updated random access configuration to the terminal; wherein, the random access configuration is that at least one cell in the candidate cell list that establishes a communication interface with the second master base station is the obtained by updating the random access resources reserved by the terminal.

本申请的至少一个实施例提供一种条件切换装置，包括：At least one embodiment of the present application provides a conditional switching device, comprising:

第一处理单元，用于当处于双连接模式的终端执行条件切换时，由第一主基站切换至第二主基站；a first processing unit, configured to switch from the first main base station to the second main base station when the terminal in the dual connection mode performs conditional handover;

发送单元，用于获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；所述候选小区列表表征第一辅基站对所述终端进行CPC配置时配置的辅小区组；a sending unit, configured to obtain a list of candidate cells, and send the list of candidate cells to the second master base station; the list of candidate cells represents a group of secondary cells configured when the first secondary base station performs CPC configuration on the terminal;

获取单元，用于当处于双连接模式的终端执行条件切换由第一主基站切换至第二主基站时，从第一辅基站获取候选小区列表；所述候选小区列表表征所述第一辅基站对所述终端进行CPC配置时配置的辅小区组；an obtaining unit, configured to obtain a list of candidate cells from the first secondary base station when the terminal in the dual connectivity mode performs conditional handover from the first primary base station to the second primary base station; the candidate cell list represents the first secondary base station a secondary cell group configured when performing CPC configuration on the terminal;

第二处理单元，用于在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。a second processing unit, configured to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second primary base station and the first secondary base station are jointly The terminal provides dual connection service.

本申请的至少一个实施例提供一种终端，包括：At least one embodiment of the present application provides a terminal, including:

第一处理器，用于当处于双连接模式的终端执行条件切换时，由第一主基站切换至第二主基站；a first processor, configured to switch from the first main base station to the second main base station when the terminal in the dual connection mode performs conditional handover;

第一通信接口，用于获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；所述候选小区列表表征第一辅基站对所述终端进行CPC配置时配置的辅小区组；The first communication interface is used to obtain a list of candidate cells and send the list of candidate cells to the second master base station; the list of candidate cells represents the secondary cells configured when the first secondary base station performs CPC configuration on the terminal Group;

本申请的至少一个实施例提供一种网络设备，包括：At least one embodiment of the present application provides a network device, including:

第二通信接口，用于当处于双连接模式的终端执行条件切换由第一主基站切换至第二主基站时，从第一辅基站获取候选小区列表；所述候选小区列表表征所述第一辅基站对所述终端进行CPC配置时配置的辅小区组；The second communication interface is configured to acquire a candidate cell list from the first secondary base station when the terminal in dual connectivity mode performs conditional handover from the first primary base station to the second primary base station; the candidate cell list represents the first primary base station a secondary cell group configured when the secondary base station performs CPC configuration on the terminal;

第二处理器，用于在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。a second processor, configured to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second primary base station and the first secondary base station are jointly The terminal provides dual connection service.

本申请的至少一个实施例提供一种终端，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，At least one embodiment of the present application provides a terminal including a processor and a memory for storing a computer program executable on the processor,

其中，所述处理器用于运行所述计算机程序时，执行上述终端侧任一项所述方法的步骤。Wherein, the processor is configured to execute the steps of any one of the methods described above on the terminal side when running the computer program.

本申请的至少一个实施例提供一种网络设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，At least one embodiment of the present application provides a network device including a processor and a memory for storing a computer program executable on the processor,

其中，所述处理器用于运行所述计算机程序时，执行上述网络设备侧任一项所述方法的步骤。Wherein, the processor is configured to execute the steps of any one of the methods on the network device side when running the computer program.

本申请的至少一个实施例提供一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现上述任一方法的步骤。At least one embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the steps of any of the foregoing methods.

本申请实施例提供的条件切换方法、装置、设备及存储介质，当处于双连接模式的终端执行条件切换时，所述终端由第一主基站切换至第二主基站；所述终端获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；所述候选小区列表表征第一辅基站对所述终端进行CPC配置时配置的辅小区组；其中，所述候选小区列表用于供所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。采用本申请实施例的技术方案，对于一个既配置了CPC又配置了条件切换(CHO，Conditional Hand Over)的双连接模式下的终端，当先触发CHO，即终端由第一主基站切换至第二主基站，若第二主基站保留原辅基站不变的情况下，则终端主动上报候选小区列表给第二主基站，可以便于第二主基站与原辅基站进行CPC配置的候选小区所在节点建立通信接口，从而第二主基站和原辅基站可以及时向终端提供双连接服务，避免双连接服务发生中断。In the conditional handover method, device, device, and storage medium provided by the embodiments of the present application, when a terminal in dual connectivity mode performs conditional handover, the terminal is handed over from the first primary base station to the second primary base station; the terminal acquires candidate cells list, and send the candidate cell list to the second primary base station; the candidate cell list represents the secondary cell group configured when the first secondary base station performs CPC configuration on the terminal; wherein, the candidate cell list uses In order for the second master base station to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second master base station and the first secondary base station together are The terminal provides dual connectivity services. Using the technical solutions of the embodiments of the present application, for a terminal in dual-connection mode configured with both CPC and Conditional Hand Over (CHO, Conditional Hand Over), CHO is triggered first, that is, the terminal is switched from the first main base station to the second The primary base station, if the second primary base station keeps the original secondary base station unchanged, the terminal will actively report the candidate cell list to the second primary base station, which can facilitate the establishment of the node where the candidate cell is located for the CPC configuration between the second primary base station and the original secondary base station. communication interface, so that the second primary base station and the original secondary base station can provide dual-connection services to the terminal in time to avoid interruption of dual-connection services.

附图说明Description of drawings

图1是相关技术中终端发生切换的实现流程示意图；Fig. 1 is the realization flow schematic diagram of terminal handover in the related art;

图2是本申请实施例第一种条件切换方法的实现流程示意图；FIG. 2 is a schematic flowchart of an implementation of a first conditional switching method according to an embodiment of the present application;

图3是本申请实施例第一种双连接模式下的终端发生条件切换时保证终端的双连接服务的实现流程示意图；FIG. 3 is a schematic flowchart of the implementation of ensuring the dual connection service of the terminal when the terminal under the first dual connection mode of the embodiment of the present application undergoes condition switching;

图4是本申请实施例第二种双连接模式下的终端发生条件切换时保证终端的双连接服务的实现流程示意图；4 is a schematic flowchart of the implementation of ensuring the dual connection service of the terminal when the terminal under the second dual connection mode according to the embodiment of the present application is switched between conditions;

图5是本申请实施例第二种条件切换方法的实现流程示意图；FIG. 5 is a schematic flowchart of an implementation of a second conditional switching method according to an embodiment of the present application;

图6是本申请实施例第三种双连接模式下的终端发起条件切换时保证终端的双连接服务的实现流程示意图；6 is a schematic flowchart of the implementation of ensuring the dual-connection service of the terminal when the terminal initiates a conditional switch in a third dual-connection mode according to an embodiment of the present application;

图7是本申请实施例第一种条件切换装置的组成结构示意图；FIG. 7 is a schematic diagram of the composition and structure of a first condition switching device according to an embodiment of the present application;

图8是本申请实施例第二种条件切换装置的组成结构示意图；8 is a schematic diagram of the composition and structure of a second condition switching device according to an embodiment of the present application;

图9是本申请实施例条件切换***的组成结构示意图；9 is a schematic diagram of the composition and structure of a condition switching system according to an embodiment of the present application;

图10是本申请实施例终端的组成结构示意图；FIG. 10 is a schematic diagram of a composition structure of a terminal according to an embodiment of the present application;

图11是本申请实施例网络设备的组成结构示意图。FIG. 11 is a schematic diagram of the composition and structure of a network device according to an embodiment of the present application.

具体实施方式Detailed ways

在对本申请实施例的技术方案进行介绍之前，先对相关技术进行说明。Before introducing the technical solutions of the embodiments of the present application, related technologies are first described.

相关技术中，终端可以与主基站(也称为主节点(MN，Master Node))建立空口连接，从而实现与主基站之间的通信；终端也可以与辅基站(也称为辅节点(SN，Secondary Node))建立空口连接，从而实现与辅基站之间的通信；终端还可以同时与主基站和辅基站建立空口连接，从而同时实现与主基站和辅基站之间的通信。终端在双连接模式下，与主基站和辅基站同时建立两个连接，其中，主基站主要负责传输信令，辅基站负责传输数据。本申请实施例的技术方案主要针对双连接模式下的终端。In the related art, the terminal can establish an air interface connection with the main base station (also called the master node (MN, Master Node)), so as to realize the communication with the master base station; the terminal can also communicate with the secondary base station (also called the secondary node (SN)) , Secondary Node)) to establish an air interface connection, so as to realize the communication with the secondary base station; the terminal can also establish an air interface connection with the primary base station and the secondary base station at the same time, so as to realize the communication with the primary base station and the secondary base station at the same time. In the dual connection mode, the terminal establishes two connections with the primary base station and the secondary base station at the same time, wherein the primary base station is mainly responsible for transmitting signaling, and the secondary base station is responsible for transmitting data. The technical solutions of the embodiments of the present application are mainly aimed at terminals in a dual connection mode.

针对双连接模式下的终端，可以配置CHO，即，主基站可以为该终端配置触发切换的门限，以及终端在潜在目标小区中使用的随机接入资源，一旦切换门限被满足，该终端向目标基站发起随机接入过程，而不需要触发测量上报等待网络下发切换命令。For the terminal in dual-connection mode, CHO can be configured, that is, the main base station can configure the threshold for triggering handover for the terminal and the random access resources used by the terminal in the potential target cell. Once the handover threshold is satisfied, the terminal sends the target The base station initiates the random access procedure without triggering measurement reporting and waiting for the network to issue a handover command.

针对双连接模式下的终端，还可以配置CPC，即，配置触发PScell改变的条件，以及与终端进行连接的辅小区组(SCG)。当CPC条件满足时，终端可以接入到潜在的SN。For the terminal in the dual connectivity mode, the CPC can also be configured, that is, the conditions for triggering the PScell change, and the secondary cell group (SCG) connected with the terminal can be configured. When the CPC condition is satisfied, the terminal can access the potential SN.

这里，对于双连接式下的终端，网络可以为其配置CHO和CPC，二者先后顺序不定，例如，可以先配置CPC后配置CHO，或者先配置CHO后配置CPC。Here, for a dual-connection terminal, the network can configure CHO and CPC for it, and the order of the two is not fixed. For example, CPC can be configured first and then CHO, or CHO can be configured first and then CPC.

图1是相关技术中终端发生切换的实现流程示意图，如图1所示，针对双连接模式下的终端，例如，对于MR-DC终端，当发生切换时，目标基站(target MN)可以为该终端增加新的SN，也可以为终端保留原SN，还可以为终端删除原SN，即，目标基站可以决定是否保留/改变/删除正在服务的SN。保留原SN可以是指target SN和source SN是同一个SN。Fig. 1 is a schematic diagram of the implementation flow of terminal handover in the related art. As shown in Fig. 1, for a terminal in dual-connection mode, for example, for an MR-DC terminal, when handover occurs, the target base station (target MN) can be the The terminal adds a new SN, can also retain the original SN for the terminal, and can also delete the original SN for the terminal, that is, the target base station can decide whether to retain/change/delete the serving SN. Retaining the original SN may mean that the target SN and the source SN are the same SN.

综上所述，假设先配置CPC后配置CHO，网络配置CHO时也不会携带CPC相关配置。针对双连接模式下的终端，既配置了CHO又配置了CPC，在CHO先发生的情况下，若在UE切换到目标小区后该目标小区保留原SN，则由于目标小区不知道原SN的CPC配置，导致新MN未与原SN建立Xn口，以添加候选SN小区，因此新MN无法与原SN共同协作，从而造成该终端无法继续接收双连接服务的问题。To sum up, assuming that CPC is configured first and then CHO is configured, CPC-related configuration will not be carried when configuring CHO on the network. For the terminal in dual connectivity mode, both CHO and CPC are configured. In the case where CHO occurs first, if the target cell retains the original SN after the UE switches to the target cell, the target cell does not know the CPC of the original SN because the target cell does not know the CPC of the original SN. Configuration, the new MN does not establish an Xn port with the original SN to add candidate SN cells, so the new MN cannot cooperate with the original SN, resulting in the problem that the terminal cannot continue to receive dual connectivity services.

基于此，本申请的各个实施例中，当处于双连接模式的终端执行条件切换时，所述终端由第一主基站切换至第二主基站；所述终端获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；所述候选小区列表表征第一辅基站对所述终端进行CPC配置时配置的辅小区组；其中，所述候选小区列表用于供所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。Based on this, in various embodiments of the present application, when a terminal in dual connectivity mode performs conditional handover, the terminal is handed over from the first main base station to the second main base station; the terminal obtains a list of candidate cells, and converts the The candidate cell list is sent to the second primary base station; the candidate cell list represents the secondary cell group configured when the first secondary base station performs CPC configuration on the terminal; wherein the candidate cell list is used for the second primary base station Under the condition that the first secondary base station is reserved, the primary base station establishes a communication interface with each cell in the candidate cell list, so that the second primary base station and the first secondary base station jointly provide dual connectivity for the terminal Serve.

需要说明的是，本申请实施例中，对于一个既配置了CPC又配置了CHO的双连接模式下的终端，当CHO先触发，终端由第一主基站切换至第二主基站，且第二主基站保留原辅基站(原SN)不变的情况下，通过终端主动上报候选小区列表给第二主基站，即，将现有的CPC配置的候选小区列表通知给目标基站，以便第二主基站(新MN)与原SN的候选小区所在节点建立通信接口，或者，通过原SN通知第二主基站(新MN)，即，将现有的CPC配置的候选小区列表通知给目标基站，以便第二主基站(新MN)与原SN的候选小区所在节点建立通信接口。It should be noted that, in this embodiment of the present application, for a terminal in a dual-connection mode in which both CPC and CHO are configured, when CHO is triggered first, the terminal is switched from the first main base station to the second main base station, and the second main base station is switched. Under the condition that the primary base station keeps the original secondary base station (original SN) unchanged, the terminal actively reports the candidate cell list to the second primary base station, that is, notifies the target base station of the existing candidate cell list configured by the CPC, so that the second primary base station can The base station (new MN) establishes a communication interface with the node where the candidate cell of the original SN is located, or notifies the second master base station (new MN) through the original SN, that is, notifies the target base station of the list of candidate cells configured by the existing CPC, so that The second master base station (new MN) establishes a communication interface with the node where the candidate cell of the original SN is located.

下面结合附图及实施例对本申请再作进一步详细的描述。The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

本申请实施例提供了一种条件切换方法，应用于终端，如图2所示，所述方法包括：An embodiment of the present application provides a conditional switching method, which is applied to a terminal. As shown in FIG. 2 , the method includes:

步骤201：当处于双连接模式的终端执行条件切换时，所述终端由第一主基站切换至第二主基站。Step 201: When the terminal in the dual connectivity mode performs the conditional handover, the terminal is handed over from the first main base station to the second main base station.

步骤202：所述终端获取候选小区列表，并将所述候选小区列表发送给所述第二主基站。Step 202: The terminal acquires a list of candidate cells, and sends the list of candidate cells to the second primary base station.

其中，所述候选小区列表表征第一辅基站对所述终端进行CPC配置时配置的辅小区组；其中，所述候选小区列表用于供所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。Wherein, the candidate cell list represents the secondary cell group configured when the first secondary base station performs CPC configuration on the terminal; wherein, the candidate cell list is used for the second primary base station to reserve the first secondary base station In the case of , establish a communication interface with each cell in the candidate cell list, so that the second primary base station and the first secondary base station jointly provide a dual-connectivity service for the terminal.

这里，在步骤201中，实际应用时，所述条件切换配置可以是指终端无需触发测量上报等待网络下发切换指令来实现切换，而是判断条件切换候选小区中是否存在满足条件切换配置执行条件的小区，当条件切换候选小区中存在满足条件切换配置执行条件的小区时，将该小区作为目标小区接入第二主基站。Here, in step 201, in practical application, the conditional handover configuration may mean that the terminal does not need to trigger measurement reporting and wait for the network to issue a handover instruction to implement handover, but instead judges whether there is a conditional handover candidate cell that satisfies the execution conditions of the conditional handover configuration If there is a cell that satisfies the conditional handover configuration execution condition in the conditional handover candidate cells, the cell is used as the target cell to access the second master base station.

这里，在步骤202中，实际应用时，通过先触发CHO，终端由第一主基站切换至第二主基站，在第二主基站保留原辅基站(原SN)不变的情况下，终端主动上报候选小区列表给第二主基站，以便第二主基站(新MN)与原SN的候选小区所在节点建立通信接口，从而新MN与原SN能够共同为终端提供双连接服务。Here, in step 202, in practical application, by first triggering CHO, the terminal is switched from the first primary base station to the second primary base station, and in the case that the second primary base station keeps the original secondary base station (original SN) unchanged, the terminal actively The candidate cell list is reported to the second master base station, so that the second master base station (new MN) establishes a communication interface with the node where the candidate cell of the original SN is located, so that the new MN and the original SN can jointly provide dual connectivity services for the terminal.

这里，建立通信接口可以是指所述第二主基站与候选小区列表中各小区分别对应的节点建立Xn接口。Here, establishing a communication interface may refer to establishing an Xn interface between the second master base station and a node corresponding to each cell in the candidate cell list respectively.

这里，本申请实施例中，所述终端为既配置了CPC又配置了CHO的双连接模式下的终端。Here, in this embodiment of the present application, the terminal is a terminal in a dual connection mode in which both CPC and CHO are configured.

下面对在双连接模式下的终端发生条件切换的情况下如何保证终端的双连接服务的过程进行详细说明。The following describes in detail the process of how to ensure the dual-connection service of the terminal when the terminal in the dual-connection mode undergoes condition switching.

实际应用时，针对处于双连接的终端，当发生条件切换时，所述终端由原MN切换至新MN，若新MN对原SN不进行删除或者改变下，即新MN在保留原SN的情况下，终端主动上报现有的CPC配置的候选小区列表给新MN，则可以保证新MN及时与原SN的各小区建立通信接口，从而新MN与原SN共同为终端提供双连接服务，保证双连接服务不中断。In practical application, for a terminal in dual connectivity, when a conditional switch occurs, the terminal is switched from the original MN to the new MN. If the new MN does not delete or change the original SN, that is, the new MN retains the original SN. In this case, the terminal actively reports the list of candidate cells configured by the existing CPC to the new MN, which can ensure that the new MN establishes a communication interface with the cells of the original SN in time, so that the new MN and the original SN jointly provide dual-connection services for the terminal, ensuring dual connectivity. Connection service is not interrupted.

基于此，在一实施例中，所述将所述候选小区列表发送给所述第二主基站，包括：Based on this, in an embodiment, the sending the candidate cell list to the second master base station includes:

这里，所述候选小区列表可以表征第一辅基站对所述终端进行CPC配置时配置的辅小区组。其中，所述CPC配置可以是指触发PScell改变的条件。PScell是终端与第一辅基站即原SN下的辅小区组(SCG)建立连接后在SCG中连接的第一个小区。SCG可以包括PScell和多个SCell，SCell是SCG中除PScell之外的其他小区。Here, the candidate cell list may represent the secondary cell group configured when the first secondary base station performs CPC configuration on the terminal. Wherein, the CPC configuration may refer to a condition for triggering PScell change. The PScell is the first cell connected in the SCG after the terminal establishes the connection with the first secondary base station, that is, the secondary cell group (SCG) under the original SN. The SCG may include a PScell and a plurality of SCells, and the SCells are other cells in the SCG except the PScell.

表1是候选小区列表的示意，如表1所示，第一辅基站为终端进行CPC配置配置的SCG包括5个小区，即Pscell、SCell1、SCell2、SCell3和SCell4。Table 1 is a schematic diagram of the candidate cell list. As shown in Table 1, the SCG configured by the first secondary base station for the CPC configuration for the terminal includes 5 cells, namely Pscell, SCell1, SCell2, SCell3 and SCell4.

表1Table 1

这里，终端向第二主基站发送候选小区列表的方式包括以下两种：Here, the terminal sends the candidate cell list to the second master base station in the following two ways:

第一种方式，终端接入第二主基站即新MN后，向新MN发送重配完成消息；所述重配完成消息携带所述候选小区列表。In the first manner, after the terminal accesses the second main base station, that is, the new MN, the terminal sends a reconfiguration complete message to the new MN; the reconfiguration complete message carries the candidate cell list.

第二种方式，终端接入第二主基站即新MN后，向MN发送无线资源控制(RRC，Radio Resource Control)消息；所述RRC消息携带所述候选小区列表。In the second manner, after the terminal accesses the second primary base station, that is, the new MN, the terminal sends a Radio Resource Control (RRC, Radio Resource Control) message to the MN; the RRC message carries the candidate cell list.

实际应用时，为了避免终端通过触发测量上报等待网络下发切换指令来实现切换，第一主基站可以为终端配置条件切换，在满足条件切换的情况下终端可以主动向第二主基站发起切换。In practical applications, in order to prevent the terminal from triggering measurement reporting and waiting for the network to issue a handover command to implement handover, the first master base station can configure conditional handover for the terminal, and the terminal can actively initiate handover to the second master base station if the conditional handover is satisfied.

基于此，在一实施例中，所述当处于双连接模式的终端执行条件切换时，所述终端由第一主基站切换至第二主基站，包括：Based on this, in an embodiment, when the terminal in the dual connectivity mode performs conditional handover, the terminal is handed over from the first primary base station to the second primary base station, including:

这里，所述条件切换配置可以是指终端无需触发测量上报等待网络下发切换指令来实现切换，而是评估条件切换候选小区是否满足条件切换配置中的执行条件。Here, the conditional handover configuration may mean that the terminal does not need to trigger measurement reporting and wait for the network to issue a handover instruction to implement handover, but instead evaluates whether the conditional handover candidate cell satisfies the execution conditions in the conditional handover configuration.

其中，所述执行条件可以是指候选小区满足条件切换时达到的测量门限。The execution condition may refer to a measurement threshold reached when the candidate cell satisfies the conditional handover.

举例来说，如表2所示，假设候选小区用小区1、小区2、小区3表示，小区1的测量值为10dB，小区2的测量值为20dB，小区3的测量值为30dB，执行条件对应的测量门限为15dB，则小区2和小区3满足执行条件，终端可以从小区2和小区3中选择一个小区作为目标小区。For example, as shown in Table 2, assuming that the candidate cells are represented by cell 1, cell 2, and cell 3, the measurement value of cell 1 is 10dB, the measurement value of cell 2 is 20dB, and the measurement value of cell 3 is 30dB. The corresponding measurement threshold is 15dB, then the cell 2 and the cell 3 satisfy the execution condition, and the terminal can select one cell from the cell 2 and the cell 3 as the target cell.

条件切换候选小区名称Conditional handover candidate cell name	测量值Measurements
小区1Cell 1	10dB10dB
小区2Cell 2	20dB20dB
小区3Cell 3	30dB30dB

表2Table 2

实际应用时，针对处于双连接的终端，当由第一主基站即原MN切换至第二主基站即新MN时，若新MN保留原SN的情况下，则终端对CPC配置的候选小区组不进行释放，可以保证新MN获取到原SN进行CPC配置的候选小区列表后，及时与原SN的候选小区建立通信接口，从而共同为终端提供双连接服务。In practical application, for a terminal in dual connectivity, when the first main base station, that is, the original MN, is handed over to the second main base station, that is, the new MN, if the new MN retains the original SN, the terminal will configure the candidate cell group for the CPC. If the release is not performed, it can be ensured that the new MN can establish a communication interface with the candidate cells of the original SN in time after obtaining the list of candidate cells for the CPC configuration of the original SN, thereby jointly providing dual connectivity services for the terminal.

基于此，在一实施例中，所述方法还包括：Based on this, in one embodiment, the method further includes:

这里，不释放所述CPC配置可以是指终端与第一辅基站即原SN进行CPC配置的候选小区组中各小区保持连接不中断。Here, not releasing the CPC configuration may mean that the terminal maintains uninterrupted connection to each cell in the candidate cell group in which the CPC configuration is performed with the first secondary base station, that is, the original SN.

在一示例中，如图3所示，描述双连接模式下的终端发生条件切换时保证终端的双连接服务的过程，包括：In an example, as shown in FIG. 3 , the process of guaranteeing the dual-connection service of the terminal when the terminal in the dual-connection mode occurs condition switching is described, including:

步骤301：当处于双连接模式的终端执行CHO时，所述终端由第一主基站切换至第二主基站。Step 301: When the terminal in the dual connection mode performs CHO, the terminal is handed over from the first main base station to the second main base station.

这里，在双连接模式下的终端未发生条件切换之前，第一主基站即原MN和第一辅基站即原SN共同为该终端提供双连接服务。Here, before the terminal in the dual connectivity mode has no conditional handover, the first primary base station, that is, the original MN, and the first secondary base station, that is, the original SN, jointly provide dual connectivity services for the terminal.

步骤302：所述终端获取第一辅基站进行CPC配置的候选小区列表。Step 302: The terminal acquires a list of candidate cells for the first secondary base station to perform CPC configuration.

这里，所述候选小区列表可以是指第一辅基站即原SN为所述终端进行CPC配置的辅小区组。Here, the candidate cell list may refer to the first secondary base station, that is, the secondary cell group in which the original SN performs CPC configuration for the terminal.

步骤303：所述终端将所述候选小区列表携带于第一信息中；将所述第一信息发送给所述第二主基站。Step 303: The terminal carries the candidate cell list in first information; and sends the first information to the second primary base station.

步骤304：所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。Step 304: In the case of reserving the first secondary base station, the second primary base station establishes a communication interface with each cell in the candidate cell list, so that the second primary base station and the first secondary base station jointly A dual-connection service is provided for the terminal.

这里，终端主动上报候选小区列表给第二主基站，具备以下优点：Here, the terminal actively reports the candidate cell list to the second master base station, which has the following advantages:

(1)对于既配置了CHO又配置了CPC的双连接模式(DC)下的终端，当终端执行CHO选择的目标小区保留原SN时，则终端在接入目标小区时主动上报CPC配置的候选小区列表，从而第二主基站(新MN)可以获取原SN的CPC配置，提前与CPC候选小区建立Xn口，以实现新MN和原SN共同提供双连接服务。(1) For a terminal in dual connectivity mode (DC) where both CHO and CPC are configured, when the target cell selected by the terminal for CHO retains the original SN, the terminal actively reports the candidate for CPC configuration when accessing the target cell cell list, so that the second master base station (new MN) can obtain the CPC configuration of the original SN, and establish an Xn interface with the CPC candidate cell in advance, so that the new MN and the original SN can jointly provide dual connectivity services.

(2)第二主基站即目标MN仅在终端成功接入后才获取对应的第一辅基站即原SN的CPC配置的候选小区列表，可以减少前期第一主基站即原MN与目标MN间交互的信令开销。(2) The second primary base station, namely the target MN, obtains the candidate cell list of the CPC configuration of the corresponding first secondary base station, namely the original SN, only after the terminal successfully accesses, which can reduce the number of gaps between the first primary base station, the original MN and the target MN in the early stage. Interaction signaling overhead.

(3)通过这种方式，目标MN可以尽快与原SN进行CPC配置的候选小区建立Xn，避免CPC条件满足而目标SN无法接入情况的出现。(3) In this way, the target MN can establish Xn as soon as possible with the candidate cell for the CPC configuration of the original SN, so as to avoid the situation that the target SN cannot access when the CPC condition is satisfied.

(4)由于SN没有更换，因此即使MN发生改变，其CPC配置也是有效的，通过这种方式，可以缩短CPC的配置时延，并减少为配置CPC而带来的UE功耗，以及重复配置问题。(4) Since the SN is not replaced, even if the MN changes, its CPC configuration is still valid. In this way, the configuration delay of the CPC can be shortened, and the UE power consumption caused by the configuration of the CPC can be reduced, and the repeated configuration can be reduced. question.

实际应用时，CHO先触发，终端由第一主基站切换至第二主基站，在第二主基站保留第一辅基站(原SN)不变的情况下，第二主基站获取到终端上报的候选小区列表后，可以与原SN的候选小区所在节点建立通信接口。原SN的候选小区所在节点可能会与第二主基站建立通信接口，也可能拒绝与第二主基站建立通信接口。在原SN的候选小区所在节点拒绝与第二主基站建立通信接口的情况下，所述第二主基站可以对候选小区列表进行更新，和/或，对候选小区为终端预留的随机接入资源进行更新。例如，删除候选小区列表中不可建立Xn口的部分候选小区；或者，拒绝与第二基站建立Xn口的候选小区；或者，对已配置的候选小区为终端预留的随机接入资源进行配置更新。In practical applications, CHO is triggered first, and the terminal is switched from the first main base station to the second main base station. In the case that the second main base station keeps the first secondary base station (original SN) unchanged, the second main base station obtains the information reported by the terminal. After the candidate cell list is obtained, a communication interface can be established with the node where the candidate cell of the original SN is located. The node where the candidate cell of the original SN is located may establish a communication interface with the second primary base station, or may refuse to establish a communication interface with the second primary base station. In the case that the node where the candidate cell of the original SN is located refuses to establish a communication interface with the second master base station, the second master base station may update the candidate cell list, and/or, the candidate cell is the random access resource reserved for the terminal to update. For example, delete some candidate cells in the candidate cell list for which the Xn port cannot be established; or, refuse to establish a candidate cell with the Xn port with the second base station; or, configure and update the random access resources reserved for the terminal by the configured candidate cells .

和/或，and / or,

这里，实际应用时，候选小区列表中小区在某些情况如负载满荷的情况下，可以拒绝与所述第二主基站建立通信接口。如表3所示，小区PScell和小区SCell4同意与第二主基站建立Xn口，小区SCell1、小区SCell2和小区SCell3拒绝与第二主基站建立Xn口。Here, in practical application, the cells in the candidate cell list may refuse to establish a communication interface with the second master base station in some cases, such as a case of full load. As shown in Table 3, the cell PScell and the cell SCell4 agree to establish the Xn port with the second master base station, and the cell SCell1, the cell SCell2 and the cell SCell3 refuse to establish the Xn port with the second master base station.

小区名称Community name	是否拒绝建立Xn口Whether to refuse to establish Xn port
PScellPScell	同意agree
SCell1SCell1	拒绝reject
SCell2SCell2	拒绝reject
SCell3SCell3	拒绝reject
SCell4SCell4	同意agree

表3table 3

在一个示例中，在候选小区列表中存在拒绝与所述第二主基站建立通信接口的小区的情况下，所述第二主基站可以将第一辅基站进行CPC配置的候选小区列表进行更新，即，将拒绝建立通信接口的小区从候选小区列表中删除。这样，所述终端接收到所述第二主基站发送的更新后的候选小区列表后，无需针对候选小区列表中拒绝与所述第二主基站建立连接的小区进行测量，从而可以节省资源。In an example, if there is a cell in the candidate cell list that refuses to establish a communication interface with the second master base station, the second master base station may update the candidate cell list for the first secondary base station to perform the CPC configuration, That is, the cell that refuses to establish the communication interface is deleted from the candidate cell list. In this way, after receiving the updated candidate cell list sent by the second master base station, the terminal does not need to measure cells in the candidate cell list that refuse to establish a connection with the second master base station, thereby saving resources.

在另外一个示例中，在候选小区列表中存在拒绝与所述第二主基站建立通信接口的小区的情况下，候选小区列表可以对为终端预留的随机接入资源进行更新，即，可建立通信接口的小区为终端预留的随机接入资源进行更新。这样，所述终端接收到所述主基站发送的更新后的随机接入配置后，根据最新的随机接入资源发起随机接入，从而避免发起不必要/错误的随机接入流程。In another example, if there is a cell in the candidate cell list that refuses to establish a communication interface with the second master base station, the candidate cell list can update the random access resources reserved for the terminal, that is, can establish The cell of the communication interface updates the random access resources reserved for the terminal. In this way, after receiving the updated random access configuration sent by the primary base station, the terminal initiates random access according to the latest random access resources, thereby avoiding initiating unnecessary/erroneous random access procedures.

在一示例中，如图4所示，描述双连接模式下的终端发起条件切换时保证终端的双连接服务的过程，包括：In an example, as shown in FIG. 4 , the process of ensuring the dual-connectivity service of the terminal when the terminal initiates a conditional switch in the dual-connectivity mode is described, including:

步骤401：第一主基站(原MN)为终端配置CHO。Step 401: The first master base station (original MN) configures CHO for the terminal.

这里，第一主基站(原MN)向潜在的目标MN(多个)发送条件切换请求；潜在目标MN收到原MN的条件切换请求后，执行401b，即添加原SN。之后，第一主基站即(原MN)通过RRC重配将CHO配置发送给终端，终端对条件切换候选小区是否满足CHO配置中的执行条件进行衡量，即执行401a。Here, the first master base station (original MN) sends a conditional handover request to the potential target MN(s); after receiving the conditional handover request from the original MN, the potential target MN executes 401b, that is, adds the original SN. After that, the first master base station (original MN) sends the CHO configuration to the terminal through RRC reconfiguration, and the terminal evaluates whether the conditional handover candidate cell satisfies the execution conditions in the CHO configuration, that is, executes 401a.

需要注意的是：步骤401b可以发生在401a前，或者发生在401a之后。It should be noted that step 401b can occur before 401a or after 401a.

这里，在终端未发生条件切换之前，终端处于双连接模式，第一主基站(原MN)和第一辅基站(原SN)共同为终端提供双连接服务。Here, before the conditional handover of the terminal occurs, the terminal is in a dual-connection mode, and the first primary base station (original MN) and the first secondary base station (original SN) jointly provide dual-connection services for the terminal.

步骤402：第一辅基站(原SN)为终端配置CPC。Step 402: The first secondary base station (original SN) configures the CPC for the terminal.

这里，第一辅基站(原SN)决定为终端配置CPC的过程可以包括：第一辅基站(原SN)对各候选小区生成对应的执行条件发送给第一主基站(原MN)，第一主基站(原MN)通过获取CPC候选小区的配置后生成CPC配置，通过RRC重配消息配置给终端，终端对候选小区是否满足CPC配置中的执行条件进行衡量。Here, the process that the first secondary base station (original SN) decides to configure the CPC for the terminal may include: the first secondary base station (original SN) generates corresponding execution conditions for each candidate cell and sends it to the first primary base station (original MN), the first The master base station (original MN) generates the CPC configuration after acquiring the configuration of the CPC candidate cell, and configures it to the terminal through the RRC reconfiguration message, and the terminal evaluates whether the candidate cell satisfies the execution conditions in the CPC configuration.

需要注意的是：CPC配置可以在CHO之前，也可以在CHO之后，或者由第一主基站(原MN)通过同一条RRC重配消息下发给终端。It should be noted that: the CPC configuration can be delivered before the CHO, or after the CHO, or delivered to the terminal by the first master base station (original MN) through the same RRC reconfiguration message.

步骤403：当目标小区满足CHO配置中的执行条件，终端向目标小区发起接入，同时，终端保持CPC配置不释放。Step 403: When the target cell satisfies the execution conditions in the CHO configuration, the terminal initiates access to the target cell, and at the same time, the terminal keeps the CPC configuration from being released.

这里，所述目标小区对应的SN为原SN。Here, the SN corresponding to the target cell is the original SN.

步骤404：终端成功接入第二主基站(目标MN)后，主动上报候选小区列表给第二主基站(目标MN)。Step 404: After the terminal successfully accesses the second master base station (target MN), it actively reports the candidate cell list to the second master base station (target MN).

这里，终端可以向第二主基站即目标MN发送重配完成消息；所述重配完成消息携带候选小区列表；或者，所述终端通过单独的上行RRC消息将CPC配置的候选小区列表发送给目标MN。Here, the terminal may send a reconfiguration complete message to the second primary base station, namely the target MN; the reconfiguration complete message carries the list of candidate cells; or, the terminal sends the list of candidate cells configured by the CPC to the target through a separate uplink RRC message MN.

步骤405：第二主基站(目标MN)通知第一主基站(原MN)终端已切换至第二主基站(目标MN)；第一主基站(原MN)通知其他候选小区释放资源，并向第一辅基站(原SN)发送重配完成消息。Step 405: The second primary base station (target MN) informs the first primary base station (original MN) that the terminal has been handed over to the second primary base station (target MN); the first primary base station (original MN) notifies other candidate cells to release resources, and sends the The first secondary base station (original SN) sends a reconfiguration complete message.

步骤406：第二主基站(目标MN)基于终端反馈的CPC配置的候选小区列表，添加对应的节点，建立Xn口。Step 406: The second master base station (target MN) adds a corresponding node based on the candidate cell list of the CPC configuration fed back by the terminal, and establishes an Xn interface.

需要注意的是：步骤406可以发生在步骤405之前或之后、It should be noted that step 406 can occur before or after step 405,

这里，CPC候选小区所在节点可以与目标MN建立Xn口，或者拒绝，或更新配置。Here, the node where the CPC candidate cell is located may establish an Xn interface with the target MN, or reject, or update the configuration.

步骤407：在候选小区拒绝与第二主基站(目标MN)建立Xn口的情况下，第二主基站(目标MN)为终端更新CPC配置的候选小区列表和/或对应的随机接入配置。Step 407: When the candidate cell refuses to establish the Xn interface with the second master base station (target MN), the second master base station (target MN) updates the CPC configuration candidate cell list and/or the corresponding random access configuration for the terminal.

这里，双连接模式下的终端发起条件切换时，终端主动上报候选小区列表给第二主基站，具备以下优点：Here, when the terminal in dual connectivity mode initiates a conditional handover, the terminal actively reports the candidate cell list to the second master base station, which has the following advantages:

(1)对于既配置了CHO又配置了CPC的双连接模式(DC)下的终端，当终端执行CHO选择的目标小区保留原SN时，则终端在接入目标小区时主动上报CPC配置的候选小区列表，从而第二主基站(目标MN)可以获取原SN的CPC配置，提前与CPC候选小区建立Xn口，以实现目标MN和原SN共同提供双连接服务。(1) For a terminal in dual connectivity mode (DC) where both CHO and CPC are configured, when the target cell selected by the terminal for CHO retains the original SN, the terminal actively reports the candidate for CPC configuration when accessing the target cell cell list, so that the second master base station (target MN) can obtain the CPC configuration of the original SN, and establish an Xn interface with the CPC candidate cell in advance, so that the target MN and the original SN can jointly provide dual connectivity services.

(2)在CHO完成之后，若候选小区拒绝与第二主基站(目标MN)建立Xn口，则第二主基站可以对CPC配置进行更新，以删除该候选小区和/或该候选小区为终端预留的随机接入资源，从而可以避免第二主基站(目标MN)/原SN再次根据终端对该候选小区的测量进行CPC重新配置，且可能是原SN已配置过的CPC候选小区的情况，进而避免由于网络需要重新配置CPC、终端重复测量等带来的终端功耗浪费及CPC配置时延增长等问题的发生。(2) After the CHO is completed, if the candidate cell refuses to establish the Xn interface with the second master base station (target MN), the second master base station may update the CPC configuration to delete the candidate cell and/or the candidate cell as a terminal Reserved random access resources, so as to avoid the situation where the second master base station (target MN)/original SN performs CPC reconfiguration again according to the measurement of the candidate cell by the terminal, and it may be a CPC candidate cell that has been configured by the original SN , thereby avoiding the occurrence of problems such as the waste of terminal power consumption and the increase of CPC configuration delay caused by the need to reconfigure the CPC in the network and the repeated measurement of the terminal.

采用本申请实施例的技术方案，对于一个既配置了CPC又配置了CHO的双连接模式下的终端，当先触发CHO，即终端由第一主基站切换至第二主基站，若第二主基站保留原辅基站不变的情况下，则终端主动上报候选小区列表给第二主基站，可以便于第二主基站与原辅基站进行CPC配置的候选小区所在节点建立通信接口，从而第二主基站和原辅基站可以及时向终端提供双连接服务，避免双连接服务发生中断。Using the technical solutions of the embodiments of the present application, for a terminal in dual-connection mode configured with both CPC and CHO, when CHO is triggered first, that is, the terminal is switched from the first main base station to the second main base station, if the second main base station In the case of keeping the original secondary base station unchanged, the terminal actively reports the candidate cell list to the second primary base station, which can facilitate the second primary base station and the original secondary base station to establish a communication interface with the node where the candidate cell of the CPC configuration is located, so that the second primary base station can establish a communication interface. The original and secondary base stations can provide dual-connection services to terminals in time to avoid interruption of dual-connection services.

本申请实施例提供了一种条件切换方法，应用于第二主基站，如图5所示，所述方法包括：The embodiment of the present application provides a conditional handover method, which is applied to the second master base station. As shown in FIG. 5 , the method includes:

步骤501：当处于双连接模式的终端执行条件切换由第一主基站切换至第二主基站时，所述第二主基站从第一辅基站获取候选小区列表。Step 501: When the terminal in the dual connectivity mode performs the conditional handover from the first master base station to the second master base station, the second master base station acquires a candidate cell list from the first secondary base station.

步骤502：所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。Step 502: In the case of reserving the first secondary base station, the second primary base station establishes a communication interface with each cell in the candidate cell list, so that the second primary base station and the first secondary base station jointly A dual-connection service is provided for the terminal.

这里，所述候选小区列表表征所述第一辅基站对所述终端进行CPC配置时配置的辅小区组。Here, the candidate cell list represents a secondary cell group configured when the first secondary base station performs CPC configuration on the terminal.

这里，在步骤501中，实际应用时，所述条件切换配置可以是指终端无需触发测量上报等待网络下发切换指令来实现切换，而是判断条件切换候选小区中是否存在满足条件切换配置执行条件的小区，当条件切换候选小区中存在满足条件切换配置执行条件的小区时，将该小区作为目标小区接入第二主基站。通过先触发CHO，终端由第一主基站切换至第二主基站，在第二主基站保留原辅基站(原SN)不变的情况下，所述第二主基站从第一辅基站获取候选小区列表，以便第二主基站(新MN)与原SN的候选小区所在节点建立通信接口，从而新MN与原SN能够共同为终端提供双连接服务。Here, in step 501, in practical application, the conditional handover configuration may mean that the terminal does not need to trigger measurement reporting and wait for the network to issue a handover instruction to implement handover, but instead judges whether there is a conditional handover candidate cell that satisfies the execution conditions of the conditional handover configuration If there is a cell that satisfies the conditional handover configuration execution condition in the conditional handover candidate cells, the cell is used as the target cell to access the second master base station. By triggering CHO first, the terminal is switched from the first primary base station to the second primary base station. In the case that the second primary base station keeps the original secondary base station (original SN) unchanged, the second primary base station obtains candidates from the first secondary base station cell list, so that the second master base station (new MN) establishes a communication interface with the node where the candidate cell of the original SN is located, so that the new MN and the original SN can jointly provide dual connectivity services for the terminal.

实际应用时，通过先触发CHO，终端由第一主基站切换至第二主基站，在第二主基站保留第一辅基站(原SN)不变的情况下，第二主基站主动从第一辅基站获取候选小区列表，以便第二主基站(新MN)与原SN的候选小区所在节点建立通信接口，从而新MN与原SN能够共同为终端提供双连接服务。或者，通过先触发CHO，终端由第一主基站切换至第二主基站，在第二主基站保留第一辅基站(原SN)不变的情况下，第一辅基站主动将候选小区列表发送给第二主基站，以便第二主基站(新MN)与原SN的候选小区所在节点建立通信接口，从而新MN与原SN能够共同为终端提供双连接服务。In practical application, by first triggering CHO, the terminal is switched from the first main base station to the second main base station. In the case that the second main base station keeps the first secondary base station (original SN) unchanged, the second main base station actively switches from the first main base station to the second main base station. The secondary base station acquires the candidate cell list, so that the second primary base station (new MN) establishes a communication interface with the node where the candidate cell of the original SN is located, so that the new MN and the original SN can jointly provide dual connectivity services for the terminal. Alternatively, by first triggering CHO, the terminal is switched from the first primary base station to the second primary base station, and in the case that the second primary base station keeps the first secondary base station (original SN) unchanged, the first secondary base station actively sends the candidate cell list To the second master base station, so that the second master base station (new MN) establishes a communication interface with the node where the candidate cell of the original SN is located, so that the new MN and the original SN can jointly provide dual connectivity services for the terminal.

基于此，在一实施例中，所述第二主基站从第一辅基站获取候选小区列表，包括以下之一：Based on this, in an embodiment, the second primary base station acquires a candidate cell list from the first secondary base station, including one of the following:

实际应用时，CHO先触发，终端由第一主基站切换至第二主基站，在第二主基站保留第一辅基站(原SN)不变的情况下，第二主基站获取到终端上报的候选小区列表后，可以与原SN的候选小区所在节点建立通信接口。原SN的候选小区所在节点可能会与第二主基站建立通信接口，也可能拒绝与第二主基站建立通信接口。在原SN的候选小区所在节点拒绝与第二主基站建立通信接口的情况下，所述第二主基站可以对候选小区列表进行更新，和/或，对候选小区为终端预留的随机接入资源进行更新。In practical applications, CHO is triggered first, and the terminal is switched from the first main base station to the second main base station. In the case that the second main base station keeps the first secondary base station (original SN) unchanged, the second main base station obtains the information reported by the terminal. After the candidate cell list is obtained, a communication interface can be established with the node where the candidate cell of the original SN is located. The node where the candidate cell of the original SN is located may establish a communication interface with the second primary base station, or may refuse to establish a communication interface with the second primary base station. In the case that the node where the candidate cell of the original SN is located refuses to establish a communication interface with the second master base station, the second master base station may update the candidate cell list, and/or, the candidate cell is the random access resource reserved for the terminal to update.

和/或，and / or,

在一示例中，如图6所示，描述双连接模式下的终端发起条件切换时如何保证终端的双连接服务的过程，包括：In an example, as shown in FIG. 6 , the process of how to ensure the dual-connection service of the terminal when the terminal initiates a conditional switch in the dual-connection mode is described, including:

步骤601：第一主基站(原MN)为终端配置CHO。Step 601: The first master base station (original MN) configures CHO for the terminal.

这里，第一主基站(原MN)向潜在的目标MN(多个)发送条件切换请求；潜在目标MN收到原MN的条件切换请求后，执行601b，即添加原SN。之后，第一主基站即(原MN)通过RRC重配消息将CHO配置发送给终端，终端对条件切换候选小区是否满足CHO配置中的执行条件进行衡量，即执行601a。Here, the first master base station (original MN) sends a conditional handover request to the potential target MN(s); after receiving the conditional handover request from the original MN, the potential target MN executes 601b, that is, adds the original SN. After that, the first master base station (original MN) sends the CHO configuration to the terminal through the RRC reconfiguration message, and the terminal evaluates whether the conditional handover candidate cell satisfies the execution conditions in the CHO configuration, that is, executes 601a.

需要注意的是：步骤601b可以发生在601a前，或者发生在601a之后。It should be noted that step 601b can occur before 601a or after 601a.

步骤602：第一辅基站(原SN)为终端配置CPC。Step 602: The first secondary base station (original SN) configures the CPC for the terminal.

步骤603：当目标小区满足CHO配置中的执行条件，终端向目标小区发起接入，同时，终端保持CPC配置不释放。Step 603: When the target cell satisfies the execution conditions in the CHO configuration, the terminal initiates access to the target cell, and at the same time, the terminal keeps the CPC configuration from being released.

步骤604：第二主基站(目标MN)通知第一主基站(原MN)终端已切换至第二主基站(目标MN)；第一主基站(原MN)通知其他候选小区(候选MN)释放资源。Step 604: The second master base station (target MN) notifies the first master base station (original MN) that the terminal has been handed over to the second master base station (target MN); the first master base station (original MN) notifies other candidate cells (candidate MNs) to release resource.

步骤605：终端成功接入第二主基站(目标MN)后，第二主基站(目标MN)向第一辅基站(原SN)发送重配完成消息；所述重配完成消息中携带指示信息，用于询问原SN进行CPC配置的候选小区列表；Step 605: After the terminal successfully accesses the second primary base station (target MN), the second primary base station (target MN) sends a reconfiguration complete message to the first secondary base station (original SN); the reconfiguration complete message carries indication information , which is used to query the candidate cell list of the original SN for CPC configuration;

步骤606：第一辅基站(原SN)向第二主基站(目标MN)反馈候选小区列表。Step 606: The first secondary base station (original SN) feeds back the candidate cell list to the second primary base station (target MN).

需要注意的是：步骤606可以是基于步骤605的指示信息，也可以是，当收到第二主基站(目标MN)发送的重配完成消息后，第一辅基站(原SN)主动将候选小区列表反馈给第二主基站(目标MN)。It should be noted that step 606 may be based on the indication information of step 605, or may be, after receiving the reconfiguration complete message sent by the second primary base station (target MN), the first secondary base station (original SN) will actively The cell list is fed back to the second master base station (target MN).

步骤607：第二主基站(目标MN)基于第一辅基站(原SN)反馈的CPC配置的候选小区列表，添加对应的节点，建立Xn口。Step 607: The second primary base station (target MN) adds a corresponding node based on the candidate cell list of the CPC configuration fed back by the first secondary base station (original SN), and establishes an Xn interface.

这里，CPC配置的候选小区所在节点可以与目标MN建立Xn口，或者拒绝，或更新配置。Here, the node where the candidate cell configured by the CPC is located may establish an Xn interface with the target MN, or reject, or update the configuration.

步骤608：在候选小区拒绝与第二主基站(目标MN)建立Xn口的情况下，第二主基站(目标MN)为终端更新CPC配置的候选小区列表和/或对应的随机接入配置。Step 608: When the candidate cell refuses to establish the Xn interface with the second master base station (target MN), the second master base station (target MN) updates the CPC configuration candidate cell list and/or the corresponding random access configuration for the terminal.

这里，双连接模式下的终端发起条件切换时，第二主基站从第一辅基站获取候选小区列表，具备以下优点：Here, when the terminal in the dual connectivity mode initiates the conditional handover, the second primary base station obtains the candidate cell list from the first secondary base station, which has the following advantages:

(1)对于既配置了CHO又配置了CPC的双连接模式(DC)下的终端，当终端执行CHO选择的目标小区保留原SN时，则终端在成功接入目标小区后，第二主基站(目标MN)主动向原SN询问CPC配置的候选小区列表，且终端不释放原SN触发的CPC配置，从而第二主基站(目标MN)可以获取原SN的CPC配置，提前与CPC配置的候选小区建立Xn口，以实现目标MN和原SN共同提供双连接服务。(1) For a terminal in dual connectivity mode (DC) where both CHO and CPC are configured, when the target cell selected by the terminal retains the original SN, after the terminal successfully accesses the target cell, the second primary base station The (target MN) actively asks the original SN for the list of candidate cells configured by CPC, and the terminal does not release the CPC configuration triggered by the original SN, so that the second master base station (target MN) can obtain the CPC configuration of the original SN, and communicate with the candidate cells configured by the CPC in advance. The Xn port is established to realize the dual connection service provided by the target MN and the original SN.

(2)对于既配置了CHO又配置了CPC的双连接模式(DC)下的终端，当终端执行CHO选择的目标小区保留原SN时，则终端在成功接入目标小区后，原SN主动向第二主基站(目标MN)发送CPC配置的候选小区列表，且终端不释放原SN触发的CPC配置，从而第二主基站(目标MN)可以获取原SN的CPC配置，提前与CPC候选小区建立Xn口，以实现目标MN和原SN共同提供双连接服务。(2) For a terminal in dual-connection mode (DC) where both CHO and CPC are configured, when the target cell selected by the terminal retains the original SN, after the terminal successfully accesses the target cell, the original SN takes the initiative to send to the target cell. The second master base station (target MN) sends a list of candidate cells for the CPC configuration, and the terminal does not release the CPC configuration triggered by the original SN, so that the second master base station (target MN) can obtain the CPC configuration of the original SN and establish with the CPC candidate cells in advance Xn port, so that the target MN and the original SN can jointly provide dual-connection services.

(3)在CHO完成之后，若候选小区拒绝与第二主基站(目标MN)建立Xn口，则第二主基站可以对CPC配置进行更新，以删除该候选小区和/或该候选小区为终端预留的随机接入资源，从而可以避免第二主基站(目标MN)/原SN再次根据终端对该候选小区的测量进行CPC重新配置，且可能是原SN已配置过的CPC候选小区的情况，进而避免由于网络需要重新配置CPC、终端重复测量等带来的终端功耗浪费及CPC配置时延增长等问题的发生。(3) After the CHO is completed, if the candidate cell refuses to establish an Xn interface with the second master base station (target MN), the second master base station may update the CPC configuration to delete the candidate cell and/or the candidate cell as a terminal Reserved random access resources, so as to avoid the situation where the second master base station (target MN)/original SN performs CPC reconfiguration again according to the measurement of the candidate cell by the terminal, and it may be a CPC candidate cell that has been configured by the original SN , thereby avoiding the occurrence of problems such as the waste of terminal power consumption and the increase of CPC configuration delay caused by the need to reconfigure the CPC in the network and the repeated measurement of the terminal.

采用本申请实施例的技术方案，对于一个既配置了CPC又配置了CHO 的双连接模式下的终端，当先触发CHO，即终端由第一主基站切换至第二主基站，若第二主基站保留原辅基站不变的情况下，则第二主基站从第一辅基站获取候选小区列表给，可以便于第二主基站与原辅基站(第一辅基站)进行CPC配置的候选小区所在节点建立通信接口，从而第二主基站和原辅基站可以及时向终端提供双连接服务，避免双连接服务发生中断。Using the technical solutions of the embodiments of the present application, for a terminal in dual connection mode configured with both CPC and CHO, when CHO is triggered first, that is, the terminal is switched from the first main base station to the second main base station, if the second main base station In the case of keeping the original secondary base station unchanged, the second primary base station obtains the candidate cell list from the first secondary base station, which can facilitate the second primary base station and the original secondary base station (first secondary base station) to perform CPC configuration of the node where the candidate cell is located A communication interface is established, so that the second primary base station and the original secondary base station can provide a dual-connection service to the terminal in time to avoid interruption of the dual-connection service.

为实现本申请实施例的条件切换方法，本申请实施例还提供一种条件切换装置，设置在终端上，图7为本申请实施例条件切换装置的组成结构示意图；如图7所示，所述装置包括：In order to realize the conditional switching method of the embodiment of the present application, the embodiment of the present application further provides a conditional switching device, which is set on the terminal. FIG. 7 is a schematic diagram of the composition and structure of the conditional switching device of the embodiment of the present application; The device includes:

第一处理单元71，用于当处于双连接模式的终端执行条件切换时，由第一主基站切换至第二主基站；The first processing unit 71 is configured to switch from the first main base station to the second main base station when the terminal in the dual connection mode performs the conditional handover;

发送单元72，用于获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；所述候选小区列表表征第一辅基站对所述终端进行有条件的PScell改变CPC配置时配置的辅小区组；A sending unit 72, configured to obtain a list of candidate cells, and send the list of candidate cells to the second primary base station; the list of candidate cells represents when the first secondary base station performs a conditional PScell change CPC configuration on the terminal The configured secondary cell group;

在一实施例中，所述发送单元72，具体用于：In one embodiment, the sending unit 72 is specifically configured to:

在一实施例中，所述第一处理单元71，具体用于：In one embodiment, the first processing unit 71 is specifically configured to:

在一实施例中，所述装置还包括：In one embodiment, the apparatus further includes:

接收单元，用于接收所述第二主基站发送的更新后的候选小区列表；其中，所述更新后的候选小区列表是当所述第二主基站被拒绝与候选小区列表中小区建立通信接口时，对CPC配置进行更新得到的；a receiving unit, configured to receive the updated candidate cell list sent by the second master base station; wherein the updated candidate cell list is when the second master base station refuses to establish a communication interface with a cell in the candidate cell list is obtained by updating the CPC configuration;

和/或，and / or,

接收所述第二主基站发送的更新后的随机接入配置；其中，所述随机接入配置是所述候选小区列表中与所述第二主基站建立通信接口的至少一个小区为所述终端预留的随机接入资源进行更新得到的。receiving the updated random access configuration sent by the second master base station; wherein, the random access configuration is that at least one cell in the candidate cell list that establishes a communication interface with the second master base station is the terminal It is obtained by updating the reserved random access resources.

实际应用时，所述发送单元72、接收单元可以由条件切换装置中的通信接口实现；所述第一处理单元71可以由条件切换装置中的处理器实现。In practical application, the sending unit 72 and the receiving unit may be implemented by a communication interface in the condition switching apparatus; the first processing unit 71 may be implemented by a processor in the condition switching apparatus.

需要说明的是：上述实施例提供的条件切换装置在进行条件切换时，仅以上述各程序模块的划分进行举例说明，实际应用中，可以根据需要而将上述处理分配由不同的程序模块完成，即将装置的内部结构划分成不同的程序模块，以完成以上描述的全部或者部分处理。另外，上述实施例提供的条件切换装置与条件切换方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。It should be noted that: when the condition switching device provided in the above embodiment performs the condition switching, only the division of the above program modules is used as an example for illustration. That is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the conditional switching apparatus provided in the above embodiments and the conditional switching method embodiments belong to the same concept, and the specific implementation process thereof is detailed in the method embodiments, which will not be repeated here.

为实现本申请实施例的条件切换方法，本申请实施例还提供一种条件切换装置，设置在第二主基站上，图8为本申请实施例条件切换装置的组成结构示意图；如图8所示，所述装置包括：In order to realize the conditional switching method of the embodiment of the present application, the embodiment of the present application further provides a conditional switching device, which is arranged on the second main base station. shown, the device includes:

获取单元81，用于当处于双连接模式的终端执行条件切换由第一主基站切换至第二主基站时，从第一辅基站获取候选小区列表；所述候选小区列表表征所述第一辅基站对所述终端进行CPC配置时配置的辅小区组；The obtaining unit 81 is configured to obtain a list of candidate cells from the first secondary base station when the terminal in dual connectivity mode performs conditional handover from the first primary base station to the second primary base station; the candidate cell list represents the first secondary base station a secondary cell group configured when the base station performs CPC configuration on the terminal;

第二处理单元82，用于在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。The second processing unit 82 is configured to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second primary base station and the first secondary base station are jointly The terminal provides dual connectivity services.

在一实施例中，所述获取单元81，具体用于执行以下操作之一：In one embodiment, the obtaining unit 81 is specifically configured to perform one of the following operations:

在一实施例中，所述第二处理单元82，还用于：In one embodiment, the second processing unit 82 is further configured to:

向所述终端发送更新后的候选小区列表；其中，所述更新后的候选小区列表是当所述第二主基站被拒绝与候选小区列表中小区建立通信接口时，对CPC配置进行更新得到的；Send the updated candidate cell list to the terminal; wherein, the updated candidate cell list is obtained by updating the CPC configuration when the second master base station is refused to establish a communication interface with a cell in the candidate cell list ;

和/或，and / or,

向所述终端发送更新后的随机接入配置；其中，所述随机接入配置是所述候选小区列表中与所述第二主基站建立通信接口的至少一个小区为所述终端预留的随机接入资源进行更新得到的。Send the updated random access configuration to the terminal; wherein, the random access configuration is a random access configuration reserved for the terminal by at least one cell in the candidate cell list that establishes a communication interface with the second primary base station It is obtained by accessing the resource for updating.

实际应用时，所述获取单元81可以由条件切换装置中的通信接口实现；所述第二处理单元82可以由条件切换装置中的处理器实现。In practical application, the obtaining unit 81 may be implemented by a communication interface in the condition switching apparatus; the second processing unit 82 may be implemented by a processor in the condition switching apparatus.

为实现本申请实施例的条件切换方法，本申请实施例还提供一种条件切换***，图9为本申请实施例条件切换***的组成结构示意图；如图9所示，所述***包括：In order to realize the conditional switching method of the embodiment of the present application, the embodiment of the present application further provides a conditional switching system, and FIG. 9 is a schematic diagram of the composition and structure of the conditional switching system according to the embodiment of the present application; as shown in FIG. 9 , the system includes:

终端91，用于当处于双连接模式的终端执行条件切换时，由第一主基站切换至第二主基站；获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；The terminal 91 is configured to switch from the first main base station to the second main base station when the terminal in the dual connectivity mode performs the conditional handover; obtain a list of candidate cells, and send the list of candidate cells to the second main base station;

第二主基站92，用于在保留第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。The second master base station 92 is configured to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second master base station and the first secondary base station jointly serve as the The terminal provides dual connection service.

这里，所述终端91和第二主基站92的执行过程已在上文描述，在此不再赘述。Here, the execution processes of the terminal 91 and the second master base station 92 have been described above, and are not repeated here.

本申请实施例还提供了一种终端，如图10所示，包括：The embodiment of the present application also provides a terminal, as shown in FIG. 10 , including:

第一通信接口101，能够与其它设备进行信息交互；The first communication interface 101, capable of information interaction with other devices;

第一处理器102，与所述第一通信接口101连接，用于运行计算机程序时，执行上述终端侧一个或多个技术方案提供的方法。而所述计算机程序存储在第一存储器103上。The first processor 102 is connected to the first communication interface 101, and is configured to execute the methods provided by one or more technical solutions on the terminal side when running the computer program. And the computer program is stored on the first memory 103 .

需要说明的是：所述第一处理器102和第一通信接口101的具体处理过程详见方法实施例，这里不再赘述。It should be noted that: the specific processing procedures of the first processor 102 and the first communication interface 101 are detailed in the method embodiments, which will not be repeated here.

当然，实际应用时，终端中的各个组件通过总线***104耦合在一起。可理解，总线***104用于实现这些组件之间的连接通信。总线***104除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图10中将各种总线都标为总线***104。Of course, in practical application, various components in the terminal are coupled together through the bus system 104 . It will be appreciated that the bus system 104 is used to implement connection communication between these components. In addition to the data bus, the bus system 104 also includes a power bus, a control bus, and a status signal bus. However, for clarity of illustration, the various buses are labeled as bus system 104 in FIG. 10 .

本申请实施例中的第一存储器103用于存储各种类型的数据以支持控制器110的操作。这些数据的示例包括：用于在终端上操作的任何计算机程序。The first memory 103 in this embodiment of the present application is used to store various types of data to support the operation of the controller 110 . Examples of such data include: any computer program used to operate on the terminal.

上述本申请实施例揭示的方法可以应用于所述第一处理器102中，或者由所述第一处理器102实现。所述第一处理器102可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过所述第一处理器102中的硬件的集成逻辑电路或者软件形式的指令完成。上述的所述第一处理器102可以是通用处理器、数字数据处理器(DSP，Digital Signal Processor)，或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。所述第一处理器102可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤，可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于存储介质中，该存储介质位于第一存储器103，所述第一处理器102读取第一存储器103中的信息，结合其硬件完成前述方法的步骤。The methods disclosed in the above embodiments of the present application may be applied to the first processor 102 or implemented by the first processor 102 . The first processor 102 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method may be completed by an integrated logic circuit of hardware in the first processor 102 or an instruction in the form of software. The above-mentioned first processor 102 may be a general-purpose processor, a digital data processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The first processor 102 may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of this application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the first memory 103, and the first processor 102 reads the information in the first memory 103, and completes the steps of the foregoing method in combination with its hardware.

本申请实施例还提供了一种网络设备，如图11所示，包括：The embodiment of the present application also provides a network device, as shown in FIG. 11 , including:

第二通信接口111，能够与其它设备进行信息交互；The second communication interface 111 is capable of information interaction with other devices;

第二处理器112，与所述第二通信接口111连接，用于运行计算机程序时，执行上述网络设备侧一个或多个技术方案提供的方法。而所述计算机程序存储在第二存储器113上。The second processor 112 is connected to the second communication interface 111, and is configured to execute the methods provided by one or more technical solutions on the network device side when running the computer program. And the computer program is stored on the second memory 113.

需要说明的是：所述第二处理器112和第二通信接口111的具体处理过程详见方法实施例，这里不再赘述。It should be noted that: the specific processing procedures of the second processor 112 and the second communication interface 111 are detailed in the method embodiments, and are not repeated here.

当然，实际应用时，网络设备中的各个组件通过总线***114耦合在一起。可理解，总线***114用于实现这些组件之间的连接通信。总线***114除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图11中将各种总线都标为总线***114。Of course, in practical application, various components in the network device are coupled together through the bus system 114 . It will be appreciated that the bus system 114 is used to implement the connection communication between these components. In addition to the data bus, the bus system 114 also includes a power bus, a control bus, and a status signal bus. However, for clarity of illustration, the various buses are labeled as bus system 114 in FIG. 11 .

本申请实施例中的第二存储器113用于存储各种类型的数据以支持网络设备110的操作。这些数据的示例包括：用于在网络设备上操作的任何计算机程序。The second memory 113 in this embodiment of the present application is used to store various types of data to support the operation of the network device 110 . Examples of such data include: any computer program used to operate on a network device.

上述本申请实施例揭示的方法可以应用于所述第二处理器112中，或者由所述第二处理器112实现。所述第二处理器112可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过所述第二处理器112中的硬件的集成逻辑电路或者软件形式的指令完成。上述的所述第二处理器112可以是通用处理器、数字数据处理器(DSP，Digital Signal Processor)，或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。所述第二处理器112可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤，可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于存储介质中，该存储介质位于第二存储器113，所述第二处理器112读取第二存储器113中的信息，结合其硬件完成前述方法的步骤。The methods disclosed in the above embodiments of the present application may be applied to the second processor 112 or implemented by the second processor 112 . The second processor 112 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method may be completed by an integrated logic circuit of hardware in the second processor 112 or an instruction in the form of software. The above-mentioned second processor 112 may be a general-purpose processor, a digital data processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The second processor 112 may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of this application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the second memory 113, and the second processor 112 reads the information in the second memory 113, and completes the steps of the foregoing method in combination with its hardware.

在示例性实施例中，终端、网络设备可以被一个或多个应用专用集成电路(ASIC，Application Specific Integrated Circuit)、DSP、可编程逻辑器件(PLD，Programmable Logic Device)、复杂可编程逻辑器件(CPLD，Complex Programmable Logic Device)、现场可编程门阵列(FPGA，Field-Programmable Gate Array)、通用处理器、控制器、微控制器(MCU，Micro Controller Unit)、微处理器(Microprocessor)、或者其他电子元件实现，用于执行前述方法。In an exemplary embodiment, a terminal and a network device may be implemented by one or more Application Specific Integrated Circuits (ASIC, Application Specific Integrated Circuit), DSP, Programmable Logic Device (PLD, Programmable Logic Device), Complex Programmable Logic Device ( CPLD, Complex Programmable Logic Device), Field Programmable Gate Array (FPGA, Field-Programmable Gate Array), general-purpose processor, controller, microcontroller (MCU, Micro Controller Unit), microprocessor (Microprocessor), or other Electronic components are implemented for carrying out the aforementioned method.

可以理解，本申请实施例的存储器(第一存储器103、第二存储器113)可以是易失性存储器或者非易失性存储器，也可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(ROM，Read Only Memory)、可编程只读存储器(PROM，Programmable Read-Only Memory)、可擦除可编程只读存储器(EPROM，Erasable Programmable Read-Only Memory)、电可擦除可编程只读存储器(EEPROM，Electrically Erasable Programmable Read-Only Memory)、磁性随机存取存储器(FRAM，ferromagnetic random access memory)、快闪存储器(Flash Memory)、磁表面存储器、光盘、或只读光盘(CD-ROM，Compact Disc Read-Only Memory)；磁表面存储器可以是磁盘存储器或磁带存储器。易失性存储器可以是随机存取存储器(RAM，Random Access Memory)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(SRAM，Static Random Access Memory)、同步静态随机存取存储器(SSRAM，Synchronous Static Random Access Memory)、动态随机存取存储器(DRAM，Dynamic Random Access Memory)、同步动态随机存取存储器(SDRAM，Synchronous Dynamic Random Access Memory)、双倍数据速率同步动态随机存取存储器(DDRSDRAM，Double Data Rate Synchronous Dynamic Random Access Memory)、增强型同步动态随机存取存储器(ESDRAM，Enhanced Synchronous Dynamic Random Access Memory)、同步连接动态随机存取存储器(SLDRAM，SyncLink Dynamic Random Access Memory)、直接内存总线随机存取存储器(DRRAM，Direct Rambus Random Access Memory)。本申请实施例描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。It can be understood that the memory (the first memory 103 and the second memory 113 ) in this embodiment of the present application may be a volatile memory or a nonvolatile memory, and may also include both volatile and nonvolatile memory. Among them, the non-volatile memory can be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-only memory) Only Memory), Electrically Erasable Programmable Read-Only Memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), Magnetic Random Access Memory (FRAM, ferromagnetic random access memory), Flash Memory (Flash Memory), Magnetic Surface Memory , CD-ROM, or CD-ROM (Compact Disc Read-Only Memory); magnetic surface memory can be disk memory or tape memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory Memory (DRAM, Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous Dynamic Random Access Memory), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), Enhanced Type Synchronous Dynamic Random Access Memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), Synchronous Link Dynamic Random Access Memory (SLDRAM, SyncLink Dynamic Random Access Memory), Direct Memory Bus Random Access Memory (DRRAM, Direct Rambus Random Access Memory) ). The memories described in the embodiments of the present application are intended to include, but not be limited to, these and any other suitable types of memories.

在示例性实施例中，本申请实施例还提供了一种存储介质，即计算机存储介质，具体为计算机可读存储介质，例如包括存储计算机程序的第一存储器103，上述计算机程序可由终端的第一处理器102执行，以完成前述终端侧方法所述步骤。计算机可读存储介质可以是FRAM、ROM、PROM、EPROM、EEPROM、Flash Memory、磁表面存储器、光盘、或CD-ROM等存储器。In an exemplary embodiment, an embodiment of the present application further provides a storage medium, that is, a computer storage medium, specifically a computer-readable storage medium, for example, including a first memory 103 that stores a computer program, and the above-mentioned computer program can be stored in the first memory of the terminal. A processor 102 executes to complete the steps of the aforementioned terminal-side method. The computer-readable storage medium may be memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM.

需要说明的是：“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。It should be noted that "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence.

另外，本申请实施例所记载的技术方案之间，在不冲突的情况下，可以任意组合。In addition, the technical solutions described in the embodiments of the present application may be combined arbitrarily unless there is a conflict.

以上所述，仅为本申请的较佳实施例而已，并非用于限定本申请的保护范围。The above descriptions are only preferred embodiments of the present application, and are not intended to limit the protection scope of the present application.

Claims

一种条件切换方法，所述方法包括：A conditional switching method, the method comprising:

当处于双连接模式的终端执行条件切换时，所述终端由第一主基站切换至第二主基站；When the terminal in the dual connection mode performs the conditional handover, the terminal is handed over from the first main base station to the second main base station;

所述终端获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；所述候选小区列表表征第一辅基站对所述终端进行有条件的PScell改变CPC配置时配置的辅小区组；The terminal acquires a list of candidate cells, and sends the list of candidate cells to the second primary base station; the list of candidate cells represents the secondary base station configured when the first secondary base station performs a conditional PScell change on the CPC configuration for the terminal. community group;

其中，所述候选小区列表用于供所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。The candidate cell list is used for the second master base station to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second master base station can communicate with each other. The first secondary base station jointly provides a dual connectivity service for the terminal.
根据权利要求1所述的方法，其中，所述将所述候选小区列表发送给所述第二主基站，包括：The method according to claim 1, wherein the sending the candidate cell list to the second master base station comprises:

所述终端将所述候选小区列表携带于第一信息中；carrying, by the terminal, the candidate cell list in the first information;

所述终端将所述第一信息发送给所述第二主基站。The terminal sends the first information to the second primary base station.
根据权利要求1所述的方法，其中，所述当处于双连接模式的终端执行条件切换时，所述终端由第一主基站切换至第二主基站，包括：The method according to claim 1, wherein the switching of the terminal from the first primary base station to the second primary base station when the terminal in the dual connectivity mode performs conditional switching, comprises:

所述终端接收所述第一主基站发送的条件切换配置；receiving, by the terminal, a conditional handover configuration sent by the first primary base station;

所述终端从多个条件切换候选小区中确定满足所述条件切换配置中执行条件的多个候选小区；The terminal determines, from a plurality of conditional handover candidate cells, a plurality of candidate cells that satisfy the execution conditions in the conditional handover configuration;

所述终端从所述多个候选小区中选择目标小区，以接入第二主基站。The terminal selects a target cell from the plurality of candidate cells to access the second primary base station.
根据权利要求3所述的方法，其中，所述方法还包括：The method of claim 3, wherein the method further comprises:

所述终端接入第二主基站的过程中，不释放所述CPC配置。During the process of accessing the second primary base station by the terminal, the CPC configuration is not released.
根据权利要求1所述的方法，其中，所述方法还包括：The method of claim 1, wherein the method further comprises:

所述终端接收所述第二主基站发送的更新后的候选小区列表；其中，所述更新后的候选小区列表是当所述第二主基站被拒绝与候选小区列表中小区建立通信接口时，对CPC配置进行更新得到的；The terminal receives the updated candidate cell list sent by the second master base station; wherein, the updated candidate cell list is when the second master base station refuses to establish a communication interface with a cell in the candidate cell list, Obtained by updating the CPC configuration;

和/或，and / or,

所述终端接收所述第二主基站发送的更新后的随机接入配置；其中，所述随机接入配置是所述候选小区列表中与所述第二主基站建立通信接口的至少一个小区为所述终端预留的随机接入资源进行更新得到的。The terminal receives the updated random access configuration sent by the second master base station; wherein, the random access configuration is that at least one cell in the candidate cell list that establishes a communication interface with the second master base station is: Obtained by updating the random access resources reserved by the terminal.
一种条件切换方法，所述方法包括：A conditional switching method, the method comprising:

当处于双连接模式的终端执行条件切换由第一主基站切换至第二主基站时，所述第二主基站从第一辅基站获取候选小区列表；所述候选小区列表表征所述第一辅基站对所述终端进行CPC配置时配置的辅小区组；When a terminal in dual connectivity mode performs a conditional handover from the first primary base station to the second primary base station, the second primary base station acquires a list of candidate cells from the first secondary base station; the candidate cell list represents the first secondary base station a secondary cell group configured when the base station performs CPC configuration on the terminal;

其中，所述候选小区列表用于供所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。The candidate cell list is used for the second master base station to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second master base station can communicate with each other. The first secondary base station jointly provides a dual connectivity service for the terminal.
根据权利要求6所述的方法，其中，所述第二主基站从第一辅基站获取候选小区列表，包括以下之一：The method according to claim 6, wherein the second primary base station obtains a candidate cell list from the first secondary base station, comprising one of the following:

在所述终端切换至所述第二主基站后，所述第二主基站向所述第一辅基站发送第二信息；所述第二信息用于指示所述第一辅基站向所述第二主基站发送所述候选小区列表；所述第二主基站接收所述第一辅基站发送的候选小区列表；After the terminal switches to the second primary base station, the second primary base station sends second information to the first secondary base station; the second information is used to instruct the first secondary base station to send the first secondary base station to the first secondary base station. The second master base station sends the candidate cell list; the second master base station receives the candidate cell list sent by the first secondary base station;

在所述终端切换至所述第二主基站后，所述第二主基站接收所述第一辅基站发送的候选小区列表。After the terminal switches to the second master base station, the second master base station receives the candidate cell list sent by the first secondary base station.
根据权利要求6所述的方法，其中，所述方法还包括：The method of claim 6, wherein the method further comprises:

所述第二主基站向所述终端发送更新后的候选小区列表；其中，所述更新后的候选小区列表是当所述第二主基站被拒绝与候选小区列表中小区建立通信接口时，对CPC配置进行更新得到的；The second main base station sends the updated candidate cell list to the terminal; wherein, the updated candidate cell list is a response to when the second main base station refuses to establish a communication interface with a cell in the candidate cell list. Obtained by updating the CPC configuration;

和/或，and / or,

所述第二主基站向所述终端发送更新后的随机接入配置；其中，所述随机接入配置是所述候选小区列表中与所述第二主基站建立通信接口的至少一个小区为所述终端预留的随机接入资源进行更新得到的。The second master base station sends the updated random access configuration to the terminal; wherein, the random access configuration is that at least one cell in the candidate cell list that establishes a communication interface with the second master base station is the obtained by updating the random access resources reserved by the terminal.
一种条件切换装置，包括：A conditional switching device, comprising:

第一处理单元，用于当处于双连接模式的终端执行条件切换时，由第一主基站切换至第二主基站；a first processing unit, configured to switch from the first main base station to the second main base station when the terminal in the dual connection mode performs conditional handover;

发送单元，用于获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；所述候选小区列表表征第一辅基站对所述终端进行CPC配置时配置的辅小区组；a sending unit, configured to obtain a list of candidate cells, and send the list of candidate cells to the second master base station; the list of candidate cells represents a group of secondary cells configured when the first secondary base station performs CPC configuration on the terminal;

其中，所述候选小区列表用于供所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。The candidate cell list is used for the second master base station to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second master base station can communicate with each other. The first secondary base station jointly provides a dual connectivity service for the terminal.
一种条件切换装置，包括：A conditional switching device, comprising:

获取单元，用于当处于双连接模式的终端执行条件切换由第一主基站切换至第二主基站时，从第一辅基站获取候选小区列表；所述候选小区列表表征所述第一辅基站对所述终端进行CPC配置时配置的辅小区组；an obtaining unit, configured to obtain a list of candidate cells from the first secondary base station when the terminal in the dual connectivity mode performs conditional handover from the first primary base station to the second primary base station; the candidate cell list represents the first secondary base station a secondary cell group configured when performing CPC configuration on the terminal;

第二处理单元，用于在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。a second processing unit, configured to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second primary base station and the first secondary base station are jointly The terminal provides dual connection service.
一种终端，包括：A terminal that includes:

第一处理器，用于当处于双连接模式的终端执行条件切换时，由第一主基站切换至第二主基站；a first processor, configured to switch from the first main base station to the second main base station when the terminal in the dual connection mode performs conditional handover;

第一通信接口，用于获取候选小区列表，并将所述候选小区列表发送给所述第二主基站；所述候选小区列表表征第一辅基站对所述终端进行CPC配置时配置的辅小区组；The first communication interface is used to obtain a list of candidate cells and send the list of candidate cells to the second master base station; the list of candidate cells represents the secondary cells configured when the first secondary base station performs CPC configuration on the terminal Group;

其中，所述候选小区列表用于供所述第二主基站在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。The candidate cell list is used for the second master base station to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second master base station can communicate with each other. The first secondary base station jointly provides a dual connectivity service for the terminal.
一种网络设备，包括：A network device comprising:

第二通信接口，用于当处于双连接模式的终端执行条件切换由第一主基站切换至第二主基站时，从第一辅基站获取候选小区列表；所述候选小区列表表征所述第一辅基站对所述终端进行CPC配置时配置的辅小区组；The second communication interface is configured to acquire a candidate cell list from the first secondary base station when the terminal in dual connectivity mode performs conditional handover from the first primary base station to the second primary base station; the candidate cell list represents the first primary base station a secondary cell group configured when the secondary base station performs CPC configuration on the terminal;

第二处理器，用于在保留所述第一辅基站的情况下，与所述候选小区列表中各小区建立通信接口，以使所述第二主基站与所述第一辅基站共同为所述终端提供双连接服务。a second processor, configured to establish a communication interface with each cell in the candidate cell list under the condition of reserving the first secondary base station, so that the second primary base station and the first secondary base station are jointly The terminal provides dual connection service.
一种终端，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，A terminal comprising a processor and a memory for storing a computer program executable on the processor,

其中，所述处理器用于运行所述计算机程序时，执行权利要求1至5任一项所述方法的步骤。Wherein, the processor is configured to execute the steps of the method of any one of claims 1 to 5 when running the computer program.
一种网络设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，A network device comprising a processor and memory for storing a computer program executable on the processor,

其中，所述处理器用于运行所述计算机程序时，执行权利要求6至8任一项所述方法的步骤。Wherein, when the processor is configured to execute the computer program, the steps of the method of any one of claims 6 to 8 are executed.
一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现权利要求1至5任一项所述方法的步骤，或者，执行权利要求6至8任一项所述方法的步骤。A computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the steps of the method of any one of claims 1 to 5, or executes any one of claims 6 to 8 the steps of the method.