CN116156589A

CN116156589A - A link release method, device, terminal and second network entity

Info

Publication number: CN116156589A
Application number: CN202310055787.0A
Authority: CN
Inventors: 张大钧; 刘佳敏
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2023-05-23
Also published as: CN110972223A; WO2020063847A1

Abstract

The present invention provides a link release method, device, terminal and a second network entity, wherein the link release method includes: maintaining the first data transmission link with the first network entity and communicating with the second network entity In the case of the second data transmission link between the network entities, after receiving the explicit or implicit release notification sent by the second network entity, release the first data transmission link and the wireless network on the side of the first network entity. resource allocation. This solution enables the UE to independently release the entire source-side radio resource configuration on the premise of maintaining data transmission and reception with the two network entities, thereby obtaining the performance requirement that the interruption delay during the handover process reaches 0ms, and further improving user experience.

Description

A link release method, device, terminal and second network entity

本发明申请为申请日为2018年09月28日，申请号为201811142464.0，发明名称为“一种链路释放方法、装置、终端及第二网络实体”的发明申请的分案申请。The application of the present invention is a divisional application of the invention application with the filing date of September 28, 2018, the application number of 201811142464.0, and the invention name of "a link release method, device, terminal and second network entity".

技术领域technical field

本发明涉及通信技术领域，特别是指一种链路释放方法、装置、终端及第二网络实体。The present invention relates to the field of communication technologies, and in particular to a link release method, device, terminal and second network entity.

背景技术Background technique

随着网络的不断演进，传统网络架构下的节点间移动事件无法满足针对移动性能提出的更高需求。例如，切换过程中保持数据中断为0ms已经成为下一代网络发展的基本需求；而目前普通的移动场景(如图1所示的双连接的网络场景)，终端UE移动到两个网络实体的信号覆盖交叠处后，网络将触发移动性事件；对此，传统的切换流程采用的是先中断原侧的数据传输，接入到目标节点后再继续业务传输，因此会导致较大的数据中断。With the continuous evolution of the network, the mobility events between nodes under the traditional network architecture cannot meet the higher requirements for mobility performance. For example, keeping data interruption at 0 ms during the handover process has become a basic requirement for the development of next-generation networks; and in the current common mobile scenario (such as the dual-connection network scenario shown in Figure 1), the signal of the terminal UE moving to two network entities After the overlap is covered, the network will trigger a mobility event; for this, the traditional handover process uses the method of first interrupting the data transmission on the original side, and then continuing the service transmission after connecting to the target node, which will cause a large data interruption .

针对上述问题，现有方案中提供了一种改进的MBB(Make Before Break)过程，改进后的切换过程为：UE接收到切换命令后，仍然接收来自源网络实体的数据传输，随后在UE进行上行接入过程时，将中断与源侧的数据传输，同时，开始应用目标侧的无线配置并进行到目标侧的数据传输，这个过程虽然会减少一定的中断时延，但仍无法达到0ms中断时延的要求。In view of the above problems, an improved MBB (Make Before Break) process is provided in the existing solution. The improved handover process is as follows: after the UE receives the handover command, it still receives the data transmission from the source network entity, and then the UE performs During the uplink access process, the data transmission with the source side will be interrupted. At the same time, the wireless configuration of the target side will be applied and the data transmission to the target side will be performed. Although this process will reduce the interruption delay to a certain extent, it still cannot achieve 0ms interruption. Latency requirements.

也就是，按照现有技术实现，在切换的某一瞬间，UE仅能与某一个网络实体保持数据的发送及接收。这样，当进行从一个网络实体到另一个网络实体的切换过程时将会导致空口的数据中断，无法满足0ms中断时延要求，从而影响用户的使用体验。That is, according to the prior art, at a certain moment of handover, the UE can only keep sending and receiving data with a certain network entity. In this way, when switching from one network entity to another network entity, the data of the air interface will be interrupted, which cannot meet the 0ms interruption delay requirement, thus affecting the user experience.

发明内容Contents of the invention

本发明的目的在于提供一种链路释放方法、装置、终端及第二网络实体，解决现有技术中终端切换网络实体时存在中断时延的问题。The purpose of the present invention is to provide a link release method, device, terminal and second network entity, so as to solve the problem of interruption delay when the terminal switches network entities in the prior art.

为了解决上述技术问题，本发明实施例提供一种链路释放方法，应用于终端，包括：In order to solve the above technical problems, an embodiment of the present invention provides a link release method, which is applied to a terminal, including:

在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。In the case of maintaining the first data transmission link with the first network entity and the second data transmission link with the second network entity, receiving an explicit or implicit message sent by the second network entity After the release notification, the first data transmission link and the radio resource configuration on the first network entity side are released.

可选的，所述第一网络实体与第二网络实体均为从网络实体时，所述释放所述第一数据传输链路以及第一网络实体侧的无线资源配置，包括：Optionally, when both the first network entity and the second network entity are slave network entities, releasing the first data transmission link and the radio resource configuration on the side of the first network entity includes:

释放所述第一数据传输链路以及第一网络实体侧的从小区组配置。releasing the configuration of the first data transmission link and the Scell group on the side of the first network entity.

可选的，所述第一网络实体与第二网络实体均为主网络实体时，所述释放所述第一数据传输链路以及第一网络实体侧的无线资源配置，包括：Optionally, when both the first network entity and the second network entity are master network entities, releasing the first data transmission link and the radio resource configuration on the side of the first network entity includes:

释放所述第一数据传输链路以及第一网络实体侧的主小区组配置。Release the configuration of the first data transmission link and the primary cell group on the side of the first network entity.

可选的，维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路，包括：Optionally, maintaining the first data transmission link with the first network entity and the second data transmission link with the second network entity includes:

每个终端与基站之间的数据承载DRB或终端与基站之间的信令承载SRB，同时保持有两个分组数据汇聚协议PDCP加密或解密子功能、两个无线链路层控制协议RLC层链路、两个介质访问控制MAC层链路和物理层链路。The data between each terminal and the base station bears DRB or the signaling between the terminal and the base station bears SRB, while maintaining two packet data convergence protocol PDCP encryption or decryption sub-functions, two radio link layer control protocol RLC layer chains Road, two media access control MAC layer links and physical layer links.

每个终端与基站之间的数据承载DRB或终端与基站之间的信令承载SRB，同时保持有一个分组数据汇聚协议PDCP实体、两个无线链路层控制协议RLC层链路、两个介质访问控制MAC层链路和物理层链路。The data between each terminal and the base station bears DRB or the signaling between the terminal and the base station bears SRB, while maintaining a packet data convergence protocol PDCP entity, two radio link layer control protocol RLC layer links, and two media Access control MAC layer link and physical layer link.

可选的，所述释放通知包括所述第二网络实体向所述终端发送的以下信息中的任一个：Optionally, the release notification includes any one of the following information sent by the second network entity to the terminal:

第一个下行分组数据汇聚协议PDCP数据包；The first downlink packet data convergence protocol PDCP packet;

第一个物理下行共享信道PDSCH或物理下行控制信道PDCCH信道传输；The first physical downlink shared channel PDSCH or physical downlink control channel PDCCH channel transmission;

第一个物理上行共享信道PUSCH信道的混合自动重传请求HARQ确认或无线链路层控制协议应答RLC ACK；The first physical uplink shared channel PUSCH channel hybrid automatic repeat request HARQ confirmation or radio link layer control protocol response RLC ACK;

无线资源控制RRC确认消息；Radio resource control RRC confirmation message;

PDCP控制帧；PDCP control frame;

介质访问控制层控制元素MAC CE。Media Access Control Layer Control Element MAC CE.

本发明实施例还提供了一种链路释放方法，应用于第二网络实体，包括：The embodiment of the present invention also provides a link release method, which is applied to the second network entity, including:

在终端维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，通过所述第二数据传输链路向所述终端发送释放通知，使得所述终端释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。When the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity, send to the terminal through the second data transmission link The release notification enables the terminal to release the first data transmission link and the radio resource configuration on the side of the first network entity.

可选的，所述通过所述第二数据传输链路向所述终端发送释放通知，包括：Optionally, the sending the release notification to the terminal through the second data transmission link includes:

根据下行数据传输情况，通过所述第二数据传输链路向所述终端发送释放通知。Sending a release notification to the terminal through the second data transmission link according to downlink data transmission conditions.

PDCP控制帧；PDCP control frame;

本发明实施例还提供了一种终端，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的程序；所述处理器执行所述程序时实现以下步骤：An embodiment of the present invention also provides a terminal, including a memory, a processor, a transceiver, and a program stored in the memory and operable on the processor; when the processor executes the program, the following steps are implemented :

在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，通过所述收发机接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。In the case of maintaining the first data transmission link with the first network entity and the second data transmission link with the second network entity, the transceiver receives a message sent by the second network entity After the explicit or implicit release notification, the first data transmission link and the radio resource configuration on the first network entity side are released.

可选的，所述第一网络实体与第二网络实体均为从网络实体时，所述处理器具体用于：Optionally, when both the first network entity and the second network entity are slave network entities, the processor is specifically configured to:

可选的，所述第一网络实体与第二网络实体均为主网络实体时，所述处理器具体用于：Optionally, when both the first network entity and the second network entity are master network entities, the processor is specifically configured to:

每个终端与基站之间的数据承载DRB或终端与基站之间的信令承载SRB，同时保持有两个分组数据汇聚协议PDCP加密或解密子功能、两个无线链路层控制协议RLC层链路、两个介质访问控制MAC层链路和物理层链路；或者The data between each terminal and the base station bears DRB or the signaling between the terminal and the base station bears SRB, while maintaining two packet data convergence protocol PDCP encryption or decryption sub-functions, two radio link layer control protocol RLC layer chains way, two media access control MAC layer links and physical layer links; or

PDCP控制帧；PDCP control frame;

本发明实施例还提供了一种第二网络实体，包括存储器、处理器、收发机及存储在所述存储器上并可在所述处理器上运行的程序；所述处理器执行所述程序时实现以下步骤：An embodiment of the present invention also provides a second network entity, including a memory, a processor, a transceiver, and a program stored in the memory and operable on the processor; when the processor executes the program Implement the following steps:

在终端维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，利用所述收发机通过所述第二数据传输链路向所述终端发送释放通知，使得所述终端释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。When the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity, using the transceiver to transmit the second data transmission link Sending a release notification to the terminal, so that the terminal releases the first data transmission link and the radio resource configuration on the side of the first network entity.

可选的，所述处理器具体用于：Optionally, the processor is specifically used for:

PDCP控制帧；PDCP control frame;

本发明实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述的链路释放方法的步骤。An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the above link release method are implemented.

本发明实施例还提供了一种链路释放装置，应用于终端，包括：The embodiment of the present invention also provides a link release device, which is applied to a terminal, including:

第一释放模块，用于在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。The first release module is configured to receive the second network entity while maintaining the first data transmission link with the first network entity and the second data transmission link with the second network entity After the explicit or implicit release notification is sent, the first data transmission link and the radio resource configuration on the first network entity side are released.

可选的，所述第一网络实体与第二网络实体均为从网络实体时，所述第一释放模块，包括：Optionally, when both the first network entity and the second network entity are slave network entities, the first release module includes:

第一释放子模块，用于释放所述第一数据传输链路以及第一网络实体侧的从小区组配置。The first releasing submodule is configured to release the configuration of the first data transmission link and the Scell group on the side of the first network entity.

可选的，所述第一网络实体与第二网络实体均为主网络实体时，所述第一释放模块，包括：Optionally, when both the first network entity and the second network entity are master network entities, the first release module includes:

第二释放子模块，用于释放所述第一数据传输链路以及第一网络实体侧的主小区组配置。The second release submodule is configured to release the configuration of the first data transmission link and the primary cell group on the side of the first network entity.

PDCP控制帧；PDCP control frame;

本发明实施例还提供了一种链路释放装置，应用于第二网络实体，包括：The embodiment of the present invention also provides a link release device, which is applied to the second network entity, including:

第一发送模块，用于在终端维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，通过所述第二数据传输链路向所述终端发送释放通知，使得所述终端释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。The first sending module is configured to transmit the second data when the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity The link sends a release notification to the terminal, so that the terminal releases the first data transmission link and the radio resource configuration on the side of the first network entity.

可选的，所述第一发送模块，包括：Optionally, the first sending module includes:

第一发送子模块，用于根据下行数据传输情况，通过所述第二数据传输链路向所述终端发送释放通知。The first sending submodule is configured to send a release notification to the terminal through the second data transmission link according to downlink data transmission conditions.

PDCP控制帧；PDCP control frame;

本发明的上述技术方案的有益效果如下：The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

上述方案中，所述链路释放方法通过在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置；能够使得UE在保持与两个网络实体进行数据的发送和接收前提下，可以单独释放整个源侧的无线资源配置，从而获得切换过程中的中断时延达到0ms的性能要求，进一步提升用户的使用体验。In the above solution, the link release method receives the After the explicit or implicit release notification sent by the second network entity, release the first data transmission link and the radio resource configuration on the side of the first network entity; enable the UE to keep sending data with the two network entities Under the premise of receiving and receiving, the wireless resource configuration of the entire source side can be released separately, so as to achieve the performance requirement that the interruption delay during the handover process reaches 0ms, and further improve the user experience.

附图说明Description of drawings

图1为现有技术中双连接的网络场景示意图；FIG. 1 is a schematic diagram of a dual connection network scenario in the prior art;

图2为本发明实施例的链路释放方法流程示意图一；FIG. 2 is a first schematic flow diagram of a link release method according to an embodiment of the present invention;

图3为本发明实施例的链路释放方法流程示意图二；FIG. 3 is a second schematic flow diagram of a link release method according to an embodiment of the present invention;

图4为本发明实施例的链路释放方法具体实现流程示意图一；FIG. 4 is a schematic diagram of a specific implementation flow of a link release method according to an embodiment of the present invention;

图5为本发明实施例的链路释放方法具体实现流程示意图二；FIG. 5 is a second schematic diagram of a specific implementation flow of a link release method according to an embodiment of the present invention;

图6为本发明实施例的链路释放方法具体实现流程示意图三；FIG. 6 is a schematic diagram of a third specific implementation process of a link release method according to an embodiment of the present invention;

图7为本发明实施例的终端结构示意图；FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

图8为本发明实施例的第二网络实体结构示意图；FIG. 8 is a schematic structural diagram of a second network entity according to an embodiment of the present invention;

图9为本发明实施例的链路释放装置结构示意图一；FIG. 9 is a first structural schematic diagram of a link release device according to an embodiment of the present invention;

图10为本发明实施例的链路释放装置结构示意图二。FIG. 10 is a second structural schematic diagram of a link release device according to an embodiment of the present invention.

具体实施方式Detailed ways

为使本发明要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

本发明针对现有的技术中终端切换网络实体时存在中断时延的问题，提供一种链路释放方法，应用于终端，如图2所示，包括：The present invention aims at the problem of interruption delay when the terminal switches network entities in the existing technology, and provides a link release method, which is applied to the terminal, as shown in Figure 2, including:

步骤21：在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。Step 21: In the case of maintaining the first data transmission link with the first network entity and the second data transmission link with the second network entity, receiving an explicit message sent by the second network entity Or after the implicit release notification, release the first data transmission link and the radio resource configuration on the first network entity side.

其中，第一网络实体具体可为源网络实体，第二网络实体具体可为目标网络实体，但并不以此为限。Wherein, the first network entity may specifically be a source network entity, and the second network entity may specifically be a target network entity, but not limited thereto.

本发明实施例提供的所述链路释放方法通过在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置；能够使得UE在保持与两个网络实体进行数据的发送和接收前提下，可以单独释放整个源侧的无线资源配置，从而获得切换过程中的中断时延达到0ms的性能要求，进一步提升用户的使用体验。The link release method provided by the embodiment of the present invention receives the After the explicit or implicit release notification sent by the second network entity, the first data transmission link and the radio resource configuration on the side of the first network entity are released; it is possible to enable the UE to perform data transmission with the two network entities. Under the premise of the transmission and reception, the wireless resource configuration of the entire source side can be released independently, so as to achieve the performance requirement that the interruption delay during the handover process reaches 0ms, and further improve the user experience.

其中，在所述第一网络实体与第二网络实体均为从网络实体时，所述释放所述第一数据传输链路以及第一网络实体侧的无线资源配置，包括：释放所述第一数据传输链路以及第一网络实体侧的从小区组配置。Wherein, when both the first network entity and the second network entity are slave network entities, the release of the first data transmission link and the radio resource configuration on the side of the first network entity includes: releasing the first The data transmission link and the configuration of the secondary cell group on the side of the first network entity.

在所述第一网络实体与第二网络实体均为主网络实体时，所述释放所述第一数据传输链路以及第一网络实体侧的无线资源配置，包括：释放所述第一数据传输链路以及第一网络实体侧的主小区组配置。When both the first network entity and the second network entity are master network entities, the releasing the first data transmission link and the radio resource configuration on the side of the first network entity includes: releasing the first data transmission The link and the primary cell group configuration on the side of the first network entity.

本发明实施例中，维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路，可包括：每个终端与基站之间的数据承载DRB或终端与基站之间的信令承载SRB，同时保持有两个分组数据汇聚协议PDCP加密或解密子功能、两个无线链路层控制协议RLC层链路、两个介质访问控制MAC层链路和物理层链路。In the embodiment of the present invention, maintaining the first data transmission link with the first network entity and the second data transmission link with the second network entity may include: a data bearer between each terminal and the base station DRB or the signaling between the terminal and the base station bears SRB, while maintaining two packet data convergence protocol PDCP encryption or decryption sub-functions, two radio link layer control protocol RLC layer links, and two medium access control MAC layer links road and physical layer links.

也可以是，维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路，包括：每个终端与基站之间的数据承载DRB或终端与基站之间的信令承载SRB，同时保持有一个分组数据汇聚协议PDCP实体(可包括PDCP加密或解密子功能)、两个无线链路层控制协议RLC层链路、两个介质访问控制MAC层链路和物理层链路。It may also be that maintaining the first data transmission link with the first network entity and the second data transmission link with the second network entity includes: a data bearer DRB or terminal between each terminal and the base station The signaling between the base station and the base station bears SRB, and at the same time maintains a packet data convergence protocol PDCP entity (which may include PDCP encryption or decryption sub-functions), two radio link layer control protocol RLC layer links, and two media access control MAC layer link and physical layer link.

具体的，所述释放通知包括所述第二网络实体向所述终端发送的以下信息中的任一个：第一个下行分组数据汇聚协议PDCP数据包；第一个物理下行共享信道PDSCH或物理下行控制信道PDCCH信道传输；第一个物理上行共享信道PUSCH信道的混合自动重传请求HARQ确认或无线链路层控制协议应答RLC ACK；无线资源控制RRC确认消息；PDCP控制帧；介质访问控制层控制元素MAC CE。Specifically, the release notification includes any one of the following information sent by the second network entity to the terminal: the first downlink packet data convergence protocol PDCP data packet; the first physical downlink shared channel PDSCH or physical downlink Control channel PDCCH channel transmission; hybrid automatic repeat request HARQ confirmation of the first physical uplink shared channel PUSCH channel or radio link layer control protocol response RLC ACK; radio resource control RRC confirmation message; PDCP control frame; medium access control layer control Element MAC CE.

本发明实施例还提供了一种链路释放方法，应用于第二网络实体，如图3所示，包括：The embodiment of the present invention also provides a link release method, which is applied to the second network entity, as shown in Figure 3, including:

步骤31：在终端维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，通过所述第二数据传输链路向所述终端发送释放通知，使得所述终端释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。Step 31: When the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity, transmit the The terminal sends a release notification, so that the terminal releases the first data transmission link and the radio resource configuration on the first network entity side.

本发明实施例提供的所述链路释放方法通过在终端维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，通过所述第二数据传输链路向所述终端发送释放通知，使得所述终端释放所述第一数据传输链路以及第一网络实体侧的无线资源配置；能够使得UE在保持与两个网络实体进行数据的发送和接收前提下，可以单独释放整个源侧的无线资源配置，从而获得切换过程中的中断时延达到0ms的性能要求，进一步提升用户的使用体验。In the link release method provided by the embodiment of the present invention, when the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity, by The second data transmission link sends a release notification to the terminal, so that the terminal releases the first data transmission link and the radio resource configuration on the side of the first network entity; enabling the UE to maintain communication with the two network entities On the premise of sending and receiving data, the wireless resource configuration of the entire source side can be released independently, so as to obtain the performance requirement that the interruption delay during the switching process reaches 0ms, and further improve the user experience.

其中，所述通过所述第二数据传输链路向所述终端发送释放通知，包括：根据下行数据传输情况，通过所述第二数据传输链路向所述终端发送释放通知。Wherein, the sending a release notification to the terminal through the second data transmission link includes: sending a release notification to the terminal through the second data transmission link according to downlink data transmission conditions.

下面结合终端和第二网络实体等多侧对本发明实施例提供的所述链路释放方法进行进一步说明，其中第一网络实体以源网络实体为例，第二网络实体以目标网络实体为例。The link release method provided by the embodiment of the present invention will be further described below in conjunction with multiple sides such as a terminal and a second network entity, where the first network entity uses a source network entity as an example, and the second network entity uses a target network entity as an example.

针对上述技术问题，本发明实施例提供了一种链路释放方法(具体为一种切换中释放源侧链路的优化方法)将有助于实现切换过程中的中断时延达到0ms的性能要求。本发明实施例提供的方案主要涉及以下两种情况：In view of the above technical problems, the embodiment of the present invention provides a link release method (specifically, an optimization method for releasing source-side links during handover), which will help to achieve the performance requirement that the interruption delay in the handover process reaches 0 ms . The solutions provided by the embodiments of the present invention mainly involve the following two situations:

第一种情况(在两个主网络实体之间切换，比如在两个主基站之间切换)：The first case (handover between two main network entities, such as handover between two main base stations):

在0ms切换过程中，如果目标网络实体接收到来自源网络实体的0ms切换指示(即上述的链路切换请求)，且又接收到来自UE的RRC(无线资源控制)重配完成消息(即上述的接入成功指示)后，则如果缓冲区中有待发的下行PDCP(分组数据汇聚协议)数据包(采用新的安全上下文加密或完整性保护处理的数据)或控制帧，将通过新的链路发送给UE。During the 0ms handover process, if the target network entity receives the 0ms handover indication from the source network entity (that is, the above-mentioned link switching request), and receives the RRC (Radio Resource Control) reconfiguration completion message from the UE (that is, the above-mentioned After access success indication), if there is a downlink PDCP (Packet Data Convergence Protocol) data packet (data processed with new security context encryption or integrity protection) or control frame to be sent in the buffer, it will pass through the new chain sent to the UE.

同时，目标网络实体可根据下行数据传输情况，显式或隐式地通知UE，目标网络实体与UE完成数据传输，期望UE释放源网络实体与UE之间的数据连接。At the same time, the target network entity can explicitly or implicitly notify the UE according to the downlink data transmission situation that the target network entity and the UE have completed the data transmission, expecting the UE to release the data connection between the source network entity and the UE.

在0ms切换过程中，如果UE接收到0ms切换指示(即上述链路切换指示)，可立刻配置目标侧的MCG(Master cell group，主小区组)配置，使得每个DRB(终端与基站之间的数据承载)承载或SRB(终端与基站之间的信令承载)承载，同时保持有两个PDCP加密或解密子功能、两个RLC层链路、两个MAC层链路以及两个物理层链路。可选地，保持有一个PDCP功能完整实体和两个RLC层链路、两个MAC层链路以及两个物理层链路。During the 0ms handover process, if the UE receives the 0ms handover instruction (that is, the above-mentioned link switching instruction), it can immediately configure the MCG (Master cell group, primary cell group) configuration on the target side, so that each DRB (between the terminal and the base station Data bearer) bearer or SRB (signaling bearer between the terminal and the base station) bearer, while maintaining two PDCP encryption or decryption sub-functions, two RLC layer links, two MAC layer links and two physical layers link. Optionally, there is one PDCP function complete entity and two RLC layer links, two MAC layer links and two physical layer links.

如果UE接收到来自目标网络实体的释放通知，比如：第一个下行PDCP数据包、第一个PDSCH(物理下行共享信道)或PDCCH(物理下行控制信道)信道传输、第一个PUSCH(物理上行共享信道)信道(如：无线资源控制RRC重配置消息)的HARQ(混合自动重传请求)确认或RLC ACK(无线链路层控制协议应答)、RRC确认消息、PDCP控制帧或者MAC CE(MAC controlelement，介质访问控制层控制元素)，显式地指示目标网络实体与UE完成数据传输，UE将停止源网络实体与UE之间的上行发送和下行接收，并开始释放整个源侧的MCG配置，例如释放源侧的MCG MAC(主小区组介质访问控制层)，无线链路层RLC，以及PDCP加密或解密子功能实体。执行PDCP层的重建过程。If the UE receives a release notification from the target network entity, such as: the first downlink PDCP packet, the first PDSCH (Physical Downlink Shared Channel) or PDCCH (Physical Downlink Control Channel) channel transmission, the first PUSCH (Physical Uplink Shared channel) channel (such as: radio resource control RRC reconfiguration message) HARQ (hybrid automatic repeat request) confirmation or RLC ACK (radio link layer control protocol response), RRC confirmation message, PDCP control frame or MAC CE (MAC controlelement, medium access control layer control element), explicitly instructs the target network entity to complete the data transmission with the UE, the UE will stop the uplink transmission and downlink reception between the source network entity and the UE, and start to release the MCG configuration of the entire source side, For example, MCG MAC (Master Cell Group Media Access Control Layer), Radio Link Layer RLC, and PDCP encryption or decryption sub-functional entities at the release source side. Perform the re-establishment process of the PDCP layer.

第二种情况(在两个从网络实体之间切换，比如在两个从基站之间切换)：The second case (handover between two slave network entities, such as handover between two slave base stations):

针对LTE DC(LTE dual connectivity，LTE双连接)，或EN-DC(E-UTRA-NR双连接：演进的通用地面无线接入5G双连接)或MR-DC(Multi-RAT dual connectivity，多种无线制式双连接)或NR-NR DC(NR-NR dual connectivity，5G基站-5G基站双连接)，在SCG(Secondary cell group，从小区组)0ms切换过程中，如果目标从网络实体接收到来自目标主网络实体(即上述与源从网络实体对应的主网络实体)的SCG 0ms切换指示，且又接收到来自UE的接入成功指示后，可选地，接收到来自目标主网络实体的配置完成消息(是指主网络实体与从网络实体之间的接口上传送的消息，不是空口的RRC重配消息)，则如果缓冲区中有待发的下行PDCP数据包(采用新的安全上下文加密或完整性保护处理的数据)或控制帧，将通过新的链路发送给UE。For LTE DC (LTE dual connectivity, LTE dual connectivity), or EN-DC (E-UTRA-NR dual connectivity: Evolved Universal Terrestrial Radio Access 5G dual connectivity) or MR-DC (Multi-RAT dual connectivity, multiple wireless standard dual connectivity) or NR-NR DC (NR-NR dual connectivity, 5G base station-5G base station dual connectivity), during the SCG (Secondary cell group, secondary cell group) 0ms handover process, if the target receives a message from the network entity After receiving the SCG 0ms handover instruction of the target master network entity (that is, the master network entity corresponding to the source slave network entity), and receiving the access success indication from the UE, optionally, receiving the configuration from the target master network entity Completion message (refers to the message transmitted on the interface between the master network entity and the slave network entity, not the RRC reconfiguration message of the air interface), if there is a downlink PDCP data packet to be sent in the buffer (encrypted with a new security context or Integrity protected data) or control frames will be sent to the UE via the new link.

同时，目标从网络实体可根据下行数据传输情况，显式或隐式地通知UE，目标从网络实体与UE完成数据传输，期望UE释放源从网络实体与UE之间的数据连接。At the same time, the target slave network entity can explicitly or implicitly notify the UE according to the downlink data transmission situation that the target slave network entity and the UE have completed the data transmission, expecting the UE to release the data connection between the source slave network entity and the UE.

在SCG 0ms切换过程中，如果UE接收到SCG 0ms切换指示(即上述链路切换指示)，可立刻配置目标侧的SCG配置，使得每个DRB承载或SRB承载，同时保持有两个PDCP加密或解密子功能、两个RLC层链路、两个MAC层链路以及两个物理层链路。可选地，保持有一个PDCP功能完整实体和两个RLC层链路、两个MAC层链路以及两个物理层链路。During the SCG 0ms handover process, if the UE receives the SCG 0ms handover indication (that is, the above-mentioned link handover indication), it can immediately configure the SCG configuration on the target side so that each DRB bearer or SRB bearer maintains two PDCP encrypted or Decryption sub-function, two RLC layer links, two MAC layer links and two physical layer links. Optionally, there is one PDCP function complete entity and two RLC layer links, two MAC layer links and two physical layer links.

如果UE接收到来自目标从网络实体的释放通知，比如：第一个下行PDCP数据包、第一个PDSCH或PDCCH信道传输、第一个PUSCH信道的HARQ确认或RLC ACK、RRC确认消息、PDCP控制帧或者MAC CE，显式地指示目标从网络实体与UE完成数据传输，UE将停止源从网络实体与UE之间的上行发送和下行接收，并开始释放整个源侧的SCG配置，例如释放源侧的SCGMAC(从小区组介质访问控制层)，RLC，以及PDCP加密或解密子功能实体。执行PDCP层的重建过程。If the UE receives a release notification from the target slave network entity, such as: the first downlink PDCP packet, the first PDSCH or PDCCH channel transmission, the first HARQ acknowledgment or RLC ACK of the PUSCH channel, RRC acknowledgment message, PDCP control Frame or MAC CE, explicitly instructing the target to complete the data transmission from the network entity to the UE, the UE will stop the source from the network entity and the UE from the uplink transmission and downlink reception, and start to release the SCG configuration of the entire source side, such as releasing the source SCGMAC (slave cell group medium access control layer), RLC, and PDCP encryption or decryption sub-functional entities on the side. Perform the re-establishment process of the PDCP layer.

下面对本发明实施例提供的方案进行举例说明。The solutions provided by the embodiments of the present invention are illustrated below.

举例1：eNB(4G基站)之间0ms切换过程的源链路释放机制Example 1: Source link release mechanism for 0ms handover process between eNBs (4G base stations)

如图4所示，步骤41～45：源网络实体(eNB)与UE之间一直保持原来的数据传输链路；对于目标网络实体(eNB)接收到来自源网络实体(eNB)的0ms切换指示，且又接收到来自UE的RRC重配完成消息后，则如果缓冲区中有待发的下行PDCP数据包(采用新的安全上下文加密或完整性保护处理的数据)或控制帧，将通过新的链路发送给UE。As shown in Figure 4, steps 41-45: the original data transmission link between the source network entity (eNB) and the UE is always maintained; for the target network entity (eNB) receiving a 0ms handover instruction from the source network entity (eNB) , and after receiving the RRC reconfiguration complete message from the UE, if there is a downlink PDCP packet (data processed with new security context encryption or integrity protection) or control frame to be sent in the buffer, it will pass the new The link is sent to the UE.

步骤46～47：UE与两个网络实体(eNB)维持数据的发送和接收。Steps 46-47: the UE maintains data transmission and reception with the two network entities (eNBs).

步骤48：目标网络实体(eNB)会根据下行数据传输情况，显式或隐式地通知UE，目标网络实体(eNB)与UE完成数据传输，期望UE释放源网络实体(eNB)与UE之间的数据连接；Step 48: The target network entity (eNB) will explicitly or implicitly notify the UE according to the downlink data transmission situation that the target network entity (eNB) and the UE have completed the data transmission, expecting the UE to release the communication between the source network entity (eNB) and the UE. data connection;

步骤49：UE接收到来自目标网络实体(eNB)的释放通知，比如：第一个下行PDCP数据包、第一个PDSCH或PDCCH信道传输、第一个PUSCH信道(如：RRC重配置消息)的HARQ确认或RLC ACK、RRC确认消息、PDCP控制帧或者MAC CE(显式地指示目标网络实体(eNB)与UE完成数据传输)，将停止源网络实体(eNB)与UE之间的上行发送和下行接收，并开始释放整个源侧的MCG配置，例如释放源侧的MCG MAC，RLC，以及PDCP加密或解密子功能实体。执行PDCP层的重建过程。Step 49: The UE receives a release notification from the target network entity (eNB), such as: the first downlink PDCP data packet, the first PDSCH or PDCCH channel transmission, the first PUSCH channel (such as: RRC reconfiguration message) HARQ acknowledgment or RLC ACK, RRC acknowledgment message, PDCP control frame or MAC CE (explicitly instructing the target network entity (eNB) to complete data transmission with the UE), will stop the uplink transmission between the source network entity (eNB) and the UE The downlink receives, and starts to release the MCG configuration of the entire source side, such as releasing the MCG MAC, RLC, and PDCP encryption or decryption sub-functional entities of the source side. Perform the re-establishment process of the PDCP layer.

步骤410：UE仅与目标网络实体(eNB)维持数据的发送和接收。Step 410: The UE only maintains data transmission and reception with the target network entity (eNB).

具体如图4所示，包括：Specifically as shown in Figure 4, including:

步骤41：源网络实体(Source eNB)向目标网络实体(Target eNB)发送切换请求HOrequest(0ms interruption indicator，0ms中断指示器)；Step 41: The source network entity (Source eNB) sends a handover request HOrequest (0ms interruption indicator, 0ms interruption indicator) to the target network entity (Target eNB);

步骤42：目标网络实体(Target eNB)向源网络实体(Source eNB)反馈切换请求应答HO request ACK；Step 42: The target network entity (Target eNB) feeds back the handover request response HO request ACK to the source network entity (Source eNB);

步骤43：源网络实体(Source eNB)向UE发送携带0ms中断指示器的切换指示(HOwith 0ms interruption indicator)；Step 43: The source network entity (Source eNB) sends a handover indication (HOwith 0ms interruption indicator) carrying a 0ms interruption indicator to the UE;

步骤44：UE根据切换指示接入目标网络实体(Target eNB)，也就是接入目标；Step 44: The UE accesses the target network entity (Target eNB), that is, the access target, according to the handover instruction;

步骤45：UE向目标网络实体(Target eNB)发送RRC重配完成消息(RRC ConnectionReconfiguration Complete)；Step 45: UE sends an RRC reconfiguration complete message (RRC ConnectionReconfiguration Complete) to the target network entity (Target eNB);

步骤46：UE与源网络实体(Source eNB)之间维持数据(User data)的发送和接收；Step 46: Maintain the sending and receiving of data (User data) between the UE and the source network entity (Source eNB);

步骤47：UE与目标网络实体(Target eNB)之间维持数据(User data)的发送和接收；Step 47: Maintain the sending and receiving of data (User data) between the UE and the target network entity (Target eNB);

步骤48：目标网络实体(Target eNB)向UE发送显式指示器explicit indicator；Step 48: The target network entity (Target eNB) sends an explicit indicator to the UE;

步骤49：UE停止与源网络实体(Source eNB)之间的上行发送和下行接收(Stopdata transmisson/reception)；Step 49: UE stops uplink transmission and downlink reception (Stopdata transmission/reception) with the source network entity (Source eNB);

步骤410：UE仅与目标网络实体(Target eNB)之间维持数据(User data)的发送和接收。Step 410: The UE only maintains sending and receiving of data (User data) with the target network entity (Target eNB).

举例2：LTE DC，或EN-DC或MR-DC或NR-NR DC情况下，SN(5G从基站)或SeNB(4G从基站)和SN或SeNB之间SCG 0ms切换过程的源链路释放机制Example 2: In the case of LTE DC, or EN-DC or MR-DC or NR-NR DC, source link release of SCG 0ms handover process between SN (5G secondary base station) or SeNB (4G secondary base station) and SN or SeNB mechanism

如图5所示，步骤51～56：源从网络实体与UE之间一直保持原来的数据传输链路；对于目标从网络实体接收到来自主网络实体(与源从网络实体对应的主网络实体)的SCG0ms切换指示，且又接收到来自UE的接入成功指示后，可选地，接收到来自主网络实体的配置完成消息后，则如果缓冲区中有待发的下行PDCP数据包(采用新的安全上下文加密或完整性保护处理的数据)或控制帧，将通过新的链路发送给UE。As shown in Figure 5, steps 51 to 56: the original data transmission link is always maintained between the source slave network entity and the UE; After receiving the SCGOms handover instruction from the UE, and receiving the access success instruction from the UE, optionally, after receiving the configuration completion message from the main network entity, if there are downlink PDCP data packets to be sent in the buffer (using the new security Context encryption or integrity protection processed data) or control frames, will be sent to the UE via the new link.

步骤57～58：UE与两个网络从实体维持数据的发送和接收。Steps 57-58: the UE maintains data transmission and reception with the two network slave entities.

步骤59：目标从网络实体会根据下行数据传输情况，显式或隐式地通知UE，目标从网络实体与UE完成数据传输，期望UE释放源从网络实体与UE之间的数据连接；Step 59: The target slave network entity will explicitly or implicitly notify the UE according to the downlink data transmission situation that the target slave network entity completes the data transmission with the UE, and expects the UE to release the data connection between the source slave network entity and the UE;

步骤510：UE接收到来自目标从网络实体的释放通知，比如：第一个下行PDCP数据包、第一个PDSCH或PDCCH信道传输、第一个PUSCH信道的HARQ确认或RLC ACK、RRC确认消息、PDCP控制帧或者MAC CE(显式地指示目标从网络实体与UE完成数据传输)，将停止源从网络实体与UE之间的上行发送和下行接收，并开始释放整个源侧的SCG配置，例如释放源侧的SCG MAC，RLC，以及PDCP加密或解密子功能实体。执行PDCP层的重建过程。Step 510: The UE receives a release notification from the target slave network entity, such as: the first downlink PDCP packet, the first PDSCH or PDCCH channel transmission, the first HARQ acknowledgment or RLC ACK of the PUSCH channel, RRC acknowledgment message, The PDCP control frame or MAC CE (explicitly instructing the target to complete data transmission from the network entity to the UE) will stop the source from the network entity and the UE from the uplink transmission and downlink reception, and start to release the SCG configuration of the entire source side, for example Release the SCG MAC, RLC, and PDCP encryption or decryption sub-functional entities on the source side. Perform the re-establishment process of the PDCP layer.

步骤511：UE仅与目标从网络实体维持数据的发送和接收。Step 511: The UE only maintains data transmission and reception with the target slave network entity.

其中，SN对应的是5G主基站MN，SeNB对应的是4G主基站MeNB。Wherein, the SN corresponds to the 5G main base station MN, and the SeNB corresponds to the 4G main base station MeNB.

具体如图5所示，包括：Specifically as shown in Figure 5, including:

步骤51：主网络实体MeNB/MN(MeNB或MN)向目标从网络实体Target SeNB/SN(Target SeNB或SN)发送SCG增加请求SCG Addition request(SCG 0ms interruptionindicator，SCG 0ms中断指示器)；Step 51: The master network entity MeNB/MN (MeNB or MN) sends an SCG Addition request (SCG 0ms interruption indicator, SCG 0ms interruption indicator) to the target slave network entity Target SeNB/SN (Target SeNB or SN);

步骤52：目标从网络实体Target SeNB/SN向主网络实体MeNB/MN反馈SCGG增加请求应答SCG Addition request ACK；Step 52: The target slave network entity Target SeNB/SN feeds back the SCG Addition request ACK to the master network entity MeNB/MN;

步骤53：主网络实体MeNB/MN向UE发送携带SCG 0ms中断指示器的RRC重配指示(RRC Reconfiguration with SCG 0ms interruption indicator)；Step 53: The primary network entity MeNB/MN sends an RRC reconfiguration indicator (RRC Reconfiguration with SCG 0ms interruption indicator) to the UE;

步骤54：UE根据RRC重配指示接入目标从网络实体Target SeNB/SN，也就是接入目标；Step 54: The UE instructs the access target slave network entity Target SeNB/SN according to the RRC reconfiguration, that is, the access target;

步骤55：UE向主网络实体MeNB/MN发送RRC重配完成消息(RRC ConnectionReconfiguration Complete)；Step 55: UE sends an RRC reconfiguration complete message (RRC ConnectionReconfiguration Complete) to the primary network entity MeNB/MN;

步骤56：主网络实体MeNB/MN向目标从网络实体Target SeNB/SN发送重配完成消息(Reconfiguration Complete)；Step 56: The master network entity MeNB/MN sends a reconfiguration complete message (Reconfiguration Complete) to the target slave network entity Target SeNB/SN;

步骤57：UE与源从网络实体Source SeNB/SN(Source SeNB或SN)之间维持数据(User data)的发送和接收；Step 57: The UE maintains the sending and receiving of data (User data) between the source and the network entity Source SeNB/SN (Source SeNB or SN);

步骤58：UE与目标从网络实体Target SeNB/SN之间维持数据(User data)的发送和接收；Step 58: The UE and the target slave network entity Target SeNB/SN maintain the sending and receiving of data (User data);

步骤59：目标从网络实体Target SeNB/SN向UE发送显式指示器explicitindicator；Step 59: The target sends an explicit indicator explicit indicator from the network entity Target SeNB/SN to the UE;

步骤510：UE停止与源从网络实体Source SeNB/SN之间的上行发送和下行接收(Stop data transmisson/reception)；Step 510: UE stops uplink transmission and downlink reception with the source network entity Source SeNB/SN (Stop data transmission/reception);

步骤511：UE仅与目标从网络实体Target SeNB/SN之间维持数据(User data)的发送和接收。Step 511: The UE only maintains sending and receiving of data (User data) with the target slave network entity Target SeNB/SN.

举例3：NR gNB(5G基站)或ng-eNB(可接入核心网5GC的4G基站节点)之间0ms切换过程的源链路释放机制Example 3: The source link release mechanism of the 0ms handover process between NR gNB (5G base station) or ng-eNB (4G base station node that can access the core network 5GC)

如图6所示，步骤61～65：源网络实体(NR gNB或ng-eNB)与UE之间一直保持原来的数据传输链路；对于目标网络实体(NR gNB或ng-eNB)接收到来自源网络实体(NR gNB或ng-eNB)的0ms切换指示，且又接收到来自UE的RRC重配完成消息后，则如果缓冲区中有待发的下行PDCP数据包(采用新的安全上下文加密或完整性保护处理的数据)或控制帧，将通过新的链路发送给UE。As shown in Figure 6, steps 61 to 65: the original data transmission link between the source network entity (NR gNB or ng-eNB) and the UE is always maintained; for the target network entity (NR gNB or ng-eNB) After the 0ms handover instruction of the source network entity (NR gNB or ng-eNB) and the RRC reconfiguration completion message from the UE are received, if there are downlink PDCP data packets to be sent in the buffer (encrypted with a new security context or Integrity protected data) or control frames will be sent to the UE via the new link.

步骤66～67：UE与两个网络实体(NR gNB或ng-eNB)维持数据的发送和接收。Steps 66-67: UE maintains data sending and receiving with two network entities (NR gNB or ng-eNB).

步骤68：目标网络实体(NR gNB或ng-eNB)会根据下行数据传输情况，显式或隐式地通知UE，目标网络实体(NR gNB或ng-eNB)与UE完成数据传输，期望UE释放源网络实体(NRgNB或ng-eNB)与UE之间的数据连接；Step 68: The target network entity (NR gNB or ng-eNB) will explicitly or implicitly notify the UE according to the downlink data transmission situation, and the target network entity (NR gNB or ng-eNB) completes the data transmission with the UE, expecting the UE to release Data connection between source network entity (NRgNB or ng-eNB) and UE;

步骤69：UE接收到来自目标网络实体(NR gNB或ng-eNB)的释放通知，比如：第一个下行PDCP数据包、第一个PDSCH或PDCCH信道传输、第一个PUSCH信道(如：RRC重配置消息)的HARQ确认或RLC ACK、RRC确认消息、PDCP控制帧或者MAC CE(显式地指示目标网络实体(NRgNB或ng-eNB)与UE完成数据传输)，将停止源网络实体(NR gNB或ng-eNB)与UE之间的上行发送和下行接收，并开始释放整个源侧的MCG配置，例如释放源侧的MCG MAC，RLC，以及PDCP加密或解密子功能实体。执行PDCP层的重建过程。Step 69: The UE receives a release notification from the target network entity (NR gNB or ng-eNB), such as: the first downlink PDCP data packet, the first PDSCH or PDCCH channel transmission, the first PUSCH channel (such as: RRC Reconfiguration message) HARQ acknowledgment or RLC ACK, RRC acknowledgment message, PDCP control frame or MAC CE (explicitly instructing the target network entity (NRgNB or ng-eNB) to complete data transmission with the UE), the source network entity (NRgNB or ng-eNB) will be stopped gNB or ng-eNB) and UE for uplink transmission and downlink reception, and start to release the MCG configuration on the entire source side, such as releasing the MCG MAC, RLC, and PDCP encryption or decryption sub-functional entities on the source side. Perform the re-establishment process of the PDCP layer.

步骤610：UE仅与目标网络实体(NR gNB或ng-eNB)维持数据的发送和接收。Step 610: UE only maintains data transmission and reception with the target network entity (NR gNB or ng-eNB).

具体如图6所示，包括：Specifically as shown in Figure 6, including:

步骤61：源网络实体Source gNB/nr-eNB(Source gNB或nr-eNB)向目标网络实体Target gNB/nr-eNB(Target gNB或nr-eNB)发送切换请求HO request(0ms interruptionindicator，0ms中断指示器)；Step 61: The source network entity Source gNB/nr-eNB (Source gNB or nr-eNB) sends a handover request HO request (0ms interruption indicator, 0ms interruption indicator) to the target network entity Target gNB/nr-eNB (Target gNB or nr-eNB) device);

步骤62：目标网络实体Target gNB/nr-eNB向源网络实体Source gNB/nr-eNB反馈切换请求应答HO request ACK；Step 62: The target network entity Target gNB/nr-eNB feeds back a handover request response HO request ACK to the source network entity Source gNB/nr-eNB;

步骤63：源网络实体Source gNB/nr-eNB向UE发送携带0ms中断指示器的切换指示(HO with 0ms interruption indicator)；Step 63: The source network entity Source gNB/nr-eNB sends a handover indication carrying a 0ms interruption indicator (HO with 0ms interruption indicator) to the UE;

步骤64：UE根据切换指示接入目标网络实体Target gNB/nr-eNB，也就是接入目标；Step 64: The UE accesses the target network entity Target gNB/nr-eNB according to the handover instruction, that is, the access target;

步骤65：UE向目标网络实体Target gNB/nr-eNB发送RRC重配完成消息(RRCConnection Reconfiguration Complete)；Step 65: The UE sends an RRC reconfiguration complete message (RRCConnection Reconfiguration Complete) to the target network entity Target gNB/nr-eNB;

步骤66：UE与源网络实体Source gNB/nr-eNB之间维持数据(User data)的发送和接收；Step 66: Maintain the sending and receiving of data (User data) between the UE and the source network entity Source gNB/nr-eNB;

步骤67：UE与目标网络实体Target gNB/nr-eNB之间维持数据(User data)的发送和接收；Step 67: Maintain the sending and receiving of data (User data) between the UE and the target network entity Target gNB/nr-eNB;

步骤68：目标网络实体Target gNB/nr-eNB向UE发送显式指示器explicitindicator；Step 68: The target network entity Target gNB/nr-eNB sends an explicit indicator explicit indicator to the UE;

步骤69：UE停止与源网络实体Source gNB/nr-eNB之间的上行发送和下行接收(Stop data transmisson/reception)；Step 69: The UE stops uplink transmission and downlink reception with the source network entity Source gNB/nr-eNB (Stop data transmission/reception);

步骤610：UE仅与目标网络实体Target gNB/nr-eNB之间维持数据(User data)的发送和接收。Step 610: The UE only maintains sending and receiving of data (User data) with the target network entity Target gNB/nr-eNB.

由上可知，本发明实施例提供的方案主要涉及两部分：As can be seen from the above, the solution provided by the embodiment of the present invention mainly involves two parts:

第一部分，在0ms切换过程中，UE需要与两个网络实体(eNB或NR gNB或ng-eNB)维持数据的发送和接收机制；The first part, during the 0ms handover process, the UE needs to maintain the data sending and receiving mechanism with two network entities (eNB or NR gNB or ng-eNB);

目标网络实体(eNB或NR gNB或ng-eNB)会根据下行数据传输情况，显式或隐式地通知UE，目标网络实体(eNB或NR gNB或ng-eNB)与UE完成数据传输；The target network entity (eNB or NR gNB or ng-eNB) will explicitly or implicitly notify the UE according to the downlink data transmission situation, and the target network entity (eNB or NR gNB or ng-eNB) completes the data transmission with the UE;

UE接收到来自目标网络实体(eNB或NR gNB或ng-eNB)的显示或隐式通知信息，停止源网络实体(eNB或NR gNB或ng-eNB)与UE之间的上行发送和下行接收，并开始释放整个源侧的MCG配置；The UE receives explicit or implicit notification information from the target network entity (eNB or NR gNB or ng-eNB), stops the uplink transmission and downlink reception between the source network entity (eNB or NR gNB or ng-eNB) and the UE, And start to release the MCG configuration of the entire source side;

第二部分，针对LTE DC，或EN-DC或MR-DC或NR-NR DC，UE需要与两个网络从实体(SeNB或SN)维持数据的发送和接收；The second part, for LTE DC, or EN-DC or MR-DC or NR-NR DC, UE needs to maintain data transmission and reception with two network slave entities (SeNB or SN);

针对LTE DC，或EN-DC或MR-DC或NR-NR DC，目标从网络实体(SeNB或SN)会根据下行数据传输情况，显式或隐式地通知UE，目标从网络实体(SeNB或SN)与UE完成数据传输，期望UE释放源从网络实体(SeNB或SN)与UE之间的数据连接；For LTE DC, or EN-DC or MR-DC or NR-NR DC, the target secondary network entity (SeNB or SN) will explicitly or implicitly notify the UE according to the downlink data transmission situation, and the target secondary network entity (SeNB or SN) The SN) completes the data transmission with the UE, expecting the UE to release the data connection between the source slave network entity (SeNB or SN) and the UE;

针对LTE DC，或EN-DC或MR-DC或NR-NR DC，UE接收到来自目标从网络实体(SeNB或SN)的显示或隐式通知信息，停止源从网络实体(SeNB或SN)与UE之间的上行发送和下行接收，并开始释放整个源侧的SCG配置。For LTE DC, or EN-DC or MR-DC or NR-NR DC, the UE receives explicit or implicit notification information from the target slave network entity (SeNB or SN), and stops the source slave network entity (SeNB or SN) from communicating with Uplink transmission and downlink reception between UEs, and start to release the SCG configuration of the entire source side.

综上，按照现有技术实现，UE在进行从一个网络实体到另一个网络实体的切换过程时将会导致空口的数据中断，无法满足0ms时延要求。而本发明实施例提供的方案，使得UE在保持与两个网络实体进行数据的发送和接收前提下，可以单独释放整个源侧的无线资源配置，从而获得切换过程中空口的中断时延达到0ms的性能要求，进一步提升了用户的使用体验。To sum up, according to the prior art implementation, when the UE performs a handover process from one network entity to another network entity, the data of the air interface will be interrupted, which cannot meet the 0ms delay requirement. However, the solution provided by the embodiment of the present invention enables the UE to independently release the entire source-side radio resource configuration on the premise of maintaining data transmission and reception with the two network entities, so that the interruption delay of the air interface during the handover process reaches 0ms performance requirements, further improving the user experience.

本发明实施例提供的所述终端通过在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，通过所述收发机接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置；能够使得UE在保持与两个网络实体进行数据的发送和接收前提下，可以单独释放整个源侧的无线资源配置，从而获得切换过程中的中断时延达到0ms的性能要求，进一步提升用户的使用体验。According to the embodiment of the present invention, the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity, through the transceiver After receiving the explicit or implicit release notification sent by the second network entity, release the first data transmission link and the radio resource configuration on the side of the first network entity; it is possible to enable the UE to maintain communication with the two network entities On the premise of sending and receiving data, the wireless resource configuration of the entire source side can be released independently, so as to obtain the performance requirement that the interruption delay during the switching process reaches 0ms, and further improve the user experience.

具体可如图7所示，本发明实施例提供的终端，包括：Specifically, as shown in FIG. 7, the terminal provided by the embodiment of the present invention includes:

处理器71；以及通过总线接口72与所述处理器71相连接的存储器73，所述存储器73用于存储所述处理器71在执行操作时所使用的程序和数据，当处理器71调用并执行所述存储器73中所存储的程序和数据时，执行下列过程：Processor 71; and a memory 73 connected to the processor 71 through a bus interface 72, the memory 73 is used to store programs and data used by the processor 71 when performing operations, when the processor 71 calls and When executing the programs and data stored in the memory 73, the following processes are performed:

在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，通过所述收发机74接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。In the case of maintaining the first data transmission link with the first network entity and the second data transmission link with the second network entity, the transceiver 74 receives the transmission from the second network entity Release the first data transmission link and the radio resource configuration on the side of the first network entity after the explicit or implicit release notification.

其中，收发机74与总线接口72连接，用于在处理器71的控制下接收和发送数据。Wherein, the transceiver 74 is connected with the bus interface 72 for receiving and sending data under the control of the processor 71 .

需要说明的是，在图7中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器71代表的一个或多个处理器和存储器73代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机74可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的终端，用户接口75还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。处理器71负责管理总线架构和通常的处理，存储器73可以存储处理器71在执行操作时所使用的数据。It should be noted that, in FIG. 7 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 71 and various circuits of the memory represented by the memory 73 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 74 may be a multi-element, ie, including transmitter and transceiver, providing means for communicating with various other devices over a transmission medium. For different terminals, the user interface 75 may also be an interface capable of connecting externally and internally to required devices, and the connected devices include but not limited to keypads, monitors, speakers, microphones, joysticks, and the like. The processor 71 is responsible for managing the bus architecture and general processing, and the memory 73 can store data used by the processor 71 when performing operations.

本领域技术人员可以理解，实现上述实施例的全部或者部分步骤可以通过硬件来完成，也可以通过计算机程序来指示相关的硬件来完成，所述计算机程序包括执行上述方法的部分或者全部步骤的指令；且该计算机程序可以存储于一可读存储介质中，存储介质可以是任何形式的存储介质。Those skilled in the art will understand that all or part of the steps in the above embodiments may be implemented by hardware, or may be completed by instructing the relevant hardware through a computer program, the computer program including instructions for executing part or all of the steps of the above methods ; and the computer program can be stored in a readable storage medium, and the storage medium can be any form of storage medium.

其中，在所述第一网络实体与第二网络实体均为从网络实体时，所述处理器具体用于：释放所述第一数据传输链路以及第一网络实体侧的从小区组配置。Wherein, when the first network entity and the second network entity are both secondary network entities, the processor is specifically configured to: release the first data transmission link and the secondary cell group configuration on the side of the first network entity.

在所述第一网络实体与第二网络实体均为主网络实体时，所述处理器具体用于：释放所述第一数据传输链路以及第一网络实体侧的主小区组配置。When both the first network entity and the second network entity are primary network entities, the processor is specifically configured to: release the first data transmission link and the configuration of the primary cell group on the side of the first network entity.

也可以是，维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路，包括：每个终端与基站之间的数据承载DRB或终端与基站之间的信令承载SRB，同时保持有一个分组数据汇聚协议PDCP实体、两个无线链路层控制协议RLC层链路、两个介质访问控制MAC层链路和物理层链路。It may also be that maintaining the first data transmission link with the first network entity and the second data transmission link with the second network entity includes: a data bearer DRB or terminal between each terminal and the base station The signaling between the base station and the base station bears the SRB, and at the same time maintains a packet data convergence protocol PDCP entity, two radio link layer control protocol RLC layer links, two medium access control MAC layer links and physical layer links.

其中，上述终端侧的链路释放方法的所述实现实施例均适用于该终端的实施例中，也能达到相同的技术效果。Wherein, the above implementation embodiments of the link release method on the terminal side are all applicable to the embodiments of the terminal, and can also achieve the same technical effect.

本发明实施例提供的所述第二网络实体通过在终端维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，利用所述收发机通过所述第二数据传输链路向所述终端发送释放通知，使得所述终端释放所述第一数据传输链路以及第一网络实体侧的无线资源配置；能够使得UE在保持与两个网络实体进行数据的发送和接收前提下，可以单独释放整个源侧的无线资源配置，从而获得切换过程中的中断时延达到0ms的性能要求，进一步提升用户的使用体验。According to the second network entity provided by the embodiment of the present invention, the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity, using The transceiver sends a release notification to the terminal through the second data transmission link, so that the terminal releases the first data transmission link and the radio resource configuration on the side of the first network entity; enabling the UE to keep Under the premise of sending and receiving data with two network entities, the wireless resource configuration of the entire source side can be released independently, so as to obtain the performance requirement that the interruption delay during the handover process reaches 0ms, and further improve the user experience.

具体可如图8所示，本发明实施例的第二网络实体，包括：Specifically, as shown in FIG. 8, the second network entity in the embodiment of the present invention includes:

处理器81；以及通过总线接口82与所述处理器81相连接的存储器83，所述存储器83用于存储所述处理器81在执行操作时所使用的程序和数据，当处理器81调用并执行所述存储器83中所存储的程序和数据时，执行下列过程：A processor 81; and a memory 83 connected to the processor 81 through a bus interface 82, the memory 83 is used to store programs and data used by the processor 81 when performing operations, when the processor 81 calls and When executing the programs and data stored in the memory 83, the following processes are performed:

在终端维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，利用所述收发机84通过所述第二数据传输链路向所述终端发送释放通知，使得所述终端释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。When the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity, use the transceiver 84 to pass the second data transmission link Sending a release notification to the terminal, so that the terminal releases the first data transmission link and the radio resource configuration on the side of the first network entity.

其中，收发机84与总线接口82连接，用于在处理器81的控制下接收和发送数据。Wherein, the transceiver 84 is connected with the bus interface 82 for receiving and sending data under the control of the processor 81 .

需要说明的是，在图8中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器81代表的一个或多个处理器和存储器83代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机84可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器81负责管理总线架构和通常的处理，存储器83可以存储处理器81在执行操作时所使用的数据。It should be noted that, in FIG. 8 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 81 and various circuits of the memory represented by the memory 83 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 84 may be a multi-element, ie, including transmitter and transceiver, providing means for communicating with various other devices over a transmission medium. The processor 81 is responsible for managing the bus architecture and general processing, and the memory 83 can store data used by the processor 81 when performing operations.

其中，所述处理器具体用于：根据下行数据传输情况，通过所述第二数据传输链路向所述终端发送释放通知。Wherein, the processor is specifically configured to: send a release notification to the terminal through the second data transmission link according to downlink data transmission conditions.

其中，上述第二网络实体侧的链路释放方法的所述实现实施例均适用于该第二网络实体的实施例中，也能达到相同的技术效果。Wherein, the above-mentioned implementation embodiments of the link release method on the second network entity side are all applicable to the embodiments of the second network entity, and can also achieve the same technical effect.

本发明实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述终端侧或第二网络实体侧的链路释放方法的步骤。An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the link release method on the terminal side or the second network entity side are implemented.

其中，上述终端侧或第二网络实体侧的链路释放方法的所述实现实施例均适用于该计算机可读存储介质的实施例中，也能达到对应相同的技术效果。Wherein, the above-mentioned implementation embodiments of the link release method on the terminal side or the second network entity side are all applicable to the embodiment of the computer-readable storage medium, and can also achieve the corresponding same technical effect.

本发明实施例还提供了一种链路释放装置，应用于终端，如图9所示，包括：The embodiment of the present invention also provides a link release device, which is applied to a terminal, as shown in FIG. 9, including:

第一释放模块91，用于在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。The first release module 91 is configured to receive the second network entity on the condition that the first data transmission link with the first network entity and the second data transmission link with the second network entity are maintained. After the entity sends an explicit or implicit release notification, the first data transmission link and the radio resource configuration on the side of the first network entity are released.

本发明实施例提供的所述链路释放装置通过在维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，接收到所述第二网络实体发送的显式或隐式的释放通知后，释放所述第一数据传输链路以及第一网络实体侧的无线资源配置；能够使得UE在保持与两个网络实体进行数据的发送和接收前提下，可以单独释放整个源侧的无线资源配置，从而获得切换过程中的中断时延达到0ms的性能要求，进一步提升用户的使用体验。The link release device provided by the embodiment of the present invention receives the After the explicit or implicit release notification sent by the second network entity, the first data transmission link and the radio resource configuration on the side of the first network entity are released; it is possible to enable the UE to perform data transmission with the two network entities. Under the premise of the transmission and reception, the wireless resource configuration of the entire source side can be released independently, so as to achieve the performance requirement that the interruption delay during the handover process reaches 0ms, and further improve the user experience.

其中，在所述第一网络实体与第二网络实体均为从网络实体时，所述第一释放模块，包括：第一释放子模块，用于释放所述第一数据传输链路以及第一网络实体侧的从小区组配置。Wherein, when both the first network entity and the second network entity are slave network entities, the first releasing module includes: a first releasing submodule, configured to release the first data transmission link and the first Scell group configuration on the network entity side.

在所述第一网络实体与第二网络实体均为主网络实体时，所述第一释放模块，包括：第二释放子模块，用于释放所述第一数据传输链路以及第一网络实体侧的主小区组配置。When both the first network entity and the second network entity are master network entities, the first release module includes: a second release submodule, configured to release the first data transmission link and the first network entity Primary cell group configuration on the side.

其中，上述终端侧的链路释放方法的所述实现实施例均适用于该链路释放装置的实施例中，也能达到相同的技术效果。Wherein, the implementation embodiments of the link release method on the terminal side are all applicable to the embodiment of the link release device, and can also achieve the same technical effect.

本发明实施例还提供了一种链路释放装置，应用于第二网络实体，如图10所示，包括：The embodiment of the present invention also provides a link release device, which is applied to the second network entity, as shown in Figure 10, including:

第一发送模块101，用于在终端维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，通过所述第二数据传输链路向所述终端发送释放通知，使得所述终端释放所述第一数据传输链路以及第一网络实体侧的无线资源配置。The first sending module 101 is configured to, when the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity, pass the second data The transmission link sends a release notification to the terminal, so that the terminal releases the first data transmission link and the radio resource configuration on the side of the first network entity.

本发明实施例提供的所述链路释放装置通过在终端维持与第一网络实体之间的第一数据传输链路以及与第二网络实体之间的第二数据传输链路的情况下，通过所述第二数据传输链路向所述终端发送释放通知，使得所述终端释放所述第一数据传输链路以及第一网络实体侧的无线资源配置；能够使得UE在保持与两个网络实体进行数据的发送和接收前提下，可以单独释放整个源侧的无线资源配置，从而获得切换过程中的中断时延达到0ms的性能要求，进一步提升用户的使用体验。The link release device provided by the embodiment of the present invention adopts, when the terminal maintains the first data transmission link with the first network entity and the second data transmission link with the second network entity, The second data transmission link sends a release notification to the terminal, so that the terminal releases the first data transmission link and the radio resource configuration on the side of the first network entity; enabling the UE to maintain communication with the two network entities On the premise of sending and receiving data, the wireless resource configuration of the entire source side can be released independently, so as to obtain the performance requirement that the interruption delay during the switching process reaches 0ms, and further improve the user experience.

其中，所述第一发送模块，包括：第一发送子模块，用于根据下行数据传输情况，通过所述第二数据传输链路向所述终端发送释放通知。Wherein, the first sending module includes: a first sending submodule, configured to send a release notification to the terminal through the second data transmission link according to downlink data transmission conditions.

其中，上述第二网络实体侧的链路释放方法的所述实现实施例均适用于该链路释放装置的实施例中，也能达到相同的技术效果。Wherein, the above implementation embodiments of the link release method on the second network entity side are all applicable to the embodiment of the link release device, and can also achieve the same technical effect.

需要说明的是，此说明书中所描述的许多功能部件都被称为模块/子模块，以便更加特别地强调其实现方式的独立性。It should be noted that many of the functional components described in this specification are referred to as modules/submodules, in order to more particularly emphasize the independence of their implementation.

本发明实施例中，模块/子模块可以用软件实现，以便由各种类型的处理器执行。举例来说，一个标识的可执行代码模块可以包括计算机指令的一个或多个物理或者逻辑块，举例来说，其可以被构建为对象、过程或函数。尽管如此，所标识模块的可执行代码无需物理地位于一起，而是可以包括存储在不同位里上的不同的指令，当这些指令逻辑上结合在一起时，其构成模块并且实现该模块的规定目的。In the embodiments of the present invention, the modules/submodules may be implemented by software so as to be executed by various types of processors. An identified module of executable code may, by way of example, comprise one or more physical or logical blocks of computer instructions which may, for example, be structured as an object, procedure, or function. Notwithstanding, the executable code of an identified module need not be physically located together, but may include distinct instructions stored in different bits which, when logically combined, constitute the module and implement the specified Purpose.

实际上，可执行代码模块可以是单条指令或者是许多条指令，并且甚至可以分布在多个不同的代码段上，分布在不同程序当中，以及跨越多个存储器设备分布。同样地，操作数据可以在模块内被识别，并且可以依照任何适当的形式实现并且被组织在任何适当类型的数据结构内。所述操作数据可以作为单个数据集被收集，或者可以分布在不同位置上(包括在不同存储设备上)，并且至少部分地可以仅作为电子信号存在于系统或网络上。Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs and across multiple memory devices. Likewise, operational data may be identified within modules, and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed in different locations (including on different storage devices), and may exist, at least in part, only as electronic signals on a system or network.

在模块可以利用软件实现时，考虑到现有硬件工艺的水平，所以可以以软件实现的模块，在不考虑成本的情况下，本领域技术人员都可以搭建对应的硬件电路来实现对应的功能，所述硬件电路包括常规的超大规模集成(VLSI)电路或者门阵列以及诸如逻辑芯片、晶体管之类的现有半导体或者是其它分立的元件。模块还可以用可编程硬件设备，诸如现场可编程门阵列、可编程阵列逻辑、可编程逻辑设备等实现。When the module can be realized by software, considering the level of the existing hardware technology, the module that can be realized by software, regardless of the cost, those skilled in the art can build the corresponding hardware circuit to realize the corresponding function. The hardware circuit includes conventional very large scale integration (VLSI) circuits or gate arrays as well as existing semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.

以上所述的是本发明的优选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本发明所述原理前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。What has been described above is a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can also be made without departing from the principle of the present invention. These improvements and modifications should also be considered as Be the protection scope of the present invention.

Claims

1. A link release method applied to a terminal, comprising:

under the condition of maintaining a first data transmission link between a first network entity and a second data transmission link between a second network entity, after receiving an explicit or implicit release notification sent by the second network entity, releasing the first data transmission link and radio resource configuration of a first network entity side;

Wherein maintaining a first data transmission link with a first network entity and a second data transmission link with a second network entity comprises:

a data bearer DRB between each terminal and a base station or a signaling bearer SRB between the terminal and the base station are maintained, and a packet data convergence protocol PDCP entity, two packet data convergence protocol PDCP encryption or decryption subfunctions, two radio link layer control protocol RLC layer links, two medium access control MAC layer links and a physical layer link are maintained at the same time;

when the first network entity and the second network entity are both primary network entities, the releasing the radio resource configuration of the first data transmission link and the first network entity side includes:

releasing the primary cell group configuration of the first data transmission link and the first network entity side;

wherein the release notification comprises any one of the following information sent by the second network entity to the terminal:

a first downlink packet data convergence protocol PDCP packet;

a first physical downlink shared channel PDSCH or physical downlink control channel PDCCH channel transmission;

hybrid automatic repeat request (HARQ) acknowledgement of a first Physical Uplink Shared Channel (PUSCH) channel or radio link layer control protocol acknowledgement (RLC ACK);

A radio resource control, RRC, acknowledgement message;

PDCP control frames;

the medium access control layer controls the element MAC CE.

2. The link release method according to claim 1, wherein when the first network entity and the second network entity are both slave network entities, the releasing the radio resource configuration of the first data transmission link and the first network entity side includes:

and releasing the first data transmission link and the cell group configuration of the first network entity side.

3. A link release method applied to a second network entity, comprising:

under the condition that a terminal maintains a first data transmission link between a first network entity and a second data transmission link between the terminal and a second network entity, sending a release notification to the terminal through the second data transmission link, so that the terminal releases the first data transmission link and radio resource configuration of the first network entity side;

wherein the sending, by the second data transmission link, a release notification to the terminal includes:

according to the downlink data transmission condition, a release notification is sent to the terminal through the second data transmission link;

When the first network entity and the second network entity are both the main network entity, the releasing the radio resource configuration of the first data transmission link and the first network entity side includes:

a first downlink packet data convergence protocol PDCP packet;

a radio resource control, RRC, acknowledgement message;

PDCP control frames;

the medium access control layer controls the element MAC CE.

4. A terminal comprising a memory, a processor, a transceiver, and a program stored on the memory and executable on the processor; wherein the processor, when executing the program, performs the steps of:

under the condition of maintaining a first data transmission link between a first network entity and a second data transmission link between a second network entity, after receiving an explicit or implicit release notification sent by the second network entity through the transceiver, releasing the first data transmission link and radio resource configuration of the first network entity side;

a first downlink packet data convergence protocol PDCP packet;

A radio resource control, RRC, acknowledgement message;

PDCP control frames;

the medium access control layer controls the element MAC CE.

5. The terminal of claim 4, wherein when the first network entity and the second network entity are both slave network entities, the processor is specifically configured to:

6. A second network entity comprising a memory, a processor, a transceiver, and a program stored on the memory and executable on the processor; wherein the processor, when executing the program, performs the steps of:

in the case that a terminal maintains a first data transmission link with a first network entity and a second data transmission link with a second network entity, sending a release notification to the terminal through the second data transmission link by using the transceiver, so that the terminal releases the first data transmission link and radio resource configuration of the first network entity side;

wherein, the processor is specifically configured to:

a first downlink packet data convergence protocol PDCP packet;

a radio resource control, RRC, acknowledgement message;

PDCP control frames;

the medium access control layer controls the element MAC CE.

7. A computer readable storage medium having stored thereon a computer program, characterized in that the program when executed by a processor realizes the steps of the link release method according to any of claims 1 to 2; or alternatively

The program when executed by a processor implements the steps of the link release method as claimed in claim 3.

8. A link release device applied to a terminal, comprising:

a first release module, configured to release a radio resource configuration on a first data transmission link and a first network entity side after receiving an explicit or implicit release notification sent by a second network entity while maintaining a first data transmission link with the first network entity and a second data transmission link with the second network entity;

a first downlink packet data convergence protocol PDCP packet;

a radio resource control, RRC, acknowledgement message;

PDCP control frames;

the medium access control layer controls the element MAC CE.

9. The link release apparatus of claim 8, wherein the first release module when the first network entity and the second network entity are both slave network entities comprises:

and the first release submodule is used for releasing the first data transmission link and the cell group configuration of the first network entity side.

10. A link release apparatus for use with a second network entity, comprising:

a first sending module, configured to send a release notification to a terminal through a second data transmission link under a condition that the terminal maintains a first data transmission link with a first network entity and a second data transmission link with a second network entity, so that the terminal releases the first data transmission link and radio resource configuration of the first network entity side;

Wherein, the first sending module includes:

the first sending submodule is used for sending a release notice to the terminal through the second data transmission link according to the downlink data transmission condition;

a first downlink packet data convergence protocol PDCP packet;

a radio resource control, RRC, acknowledgement message;

PDCP control frames;

the medium access control layer controls the element MAC CE.