WO2018028431A1

WO2018028431A1 - Method for establishing packet data network (pdn) connection, control plane (cp) and user equipment (ue)

Info

Publication number: WO2018028431A1
Application number: PCT/CN2017/094470
Authority: WO
Inventors: 魏鑫鹏
Original assignee: 华为技术有限公司
Priority date: 2016-08-09
Filing date: 2017-07-26
Publication date: 2018-02-15
Also published as: CN106255161A; CN106255161B

Abstract

Disclosed are a method for establishing a packet data network (PDN) connection, a control plane (CP) and a user equipment (UE), wherein same may solve the problem of resource waste caused by a PDN connection being established but not being used, and solve the problem of how to select the PDN connection so as to carry out service transmission. The method in the embodiments of the present invention comprises: a control plane (CP) selecting a target PDN connection for the UE according to a network area where the user equipment (UE) is located, wherein the target PDN connection is one PDN connection in the available PDN connections; the CP sending indication information to the UE, wherein the indication information is used for instructing the UE to carry out service transmission via the target PDN connection; if the target PDN connection is not established, when the UE is to carry out the service transmission, the CP receiving a request for establishing the target PDN connection sent, according to the indication information, by the UE; and the CP establishing the target PDN according to the received request.

Description

分组数据网PDN连接建立的方法、控制面CP及用户设备UEMethod for establishing packet data network PDN connection, control plane CP and user equipment UE

本申请要求于2016年08月09日提交中国专利局、申请号为CN201610646668.2、发明名称为“分组数据网PDN连接建立的方法、控制面CP及用户设备UE”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims priority from the Chinese Patent Application submitted to the China Patent Office on August 09, 2016, the application number is CN201610646668.2, and the invention name is "Method of Establishing Packet Data Network PDN Connection, Control Plane CP and User Equipment UE". The entire content of which is incorporated herein by reference.

技术领域Technical field

本发明涉及通信技术领域，尤其涉及分组数据网PDN连接建立的方法、控制面CP及用户设备UE。The present invention relates to the field of communications technologies, and in particular, to a method for establishing a PDN connection of a packet data network, a control plane CP, and a user equipment UE.

背景技术Background technique

控制面用户面(英文全称：Control plane and User plane，英文缩写：CU)分离网络架构中控制面(英文全称：Control Plane，英文缩写：CP)是网络的控制节点，负责网络控制相关的功能，例如，移动性管理控制以及会话管理控制等；分离网络架构中用户面(英文全称：User Plane，英文缩写：UP)是网络的用户面节点，负责用户数据的处理，例如，负责用户数据的转发，作为用户面的互联网协议(英文全称：Internet Protocol，英文缩写：IP)地址锚点，例如：路由器。为了给用户设备(英文全称：User Equipment，英文缩写：UE)提供优化的用户面路径，提出了当UE所处的网络区域发生变化时，在不影响业务连续性的前提下，允许为UE重新选择IP地址锚点的方案。The control plane user plane (English name: Control plane and User plane, English abbreviation: CU) separates the control plane in the network architecture (English full name: Control Plane, English abbreviation: CP) is the control node of the network, responsible for network control related functions, For example, mobility management control and session management control; the user plane in the separate network architecture (English name: User Plane, English abbreviation: UP) is the user plane node of the network, responsible for the processing of user data, for example, responsible for forwarding user data. As the user interface of the Internet Protocol (English full name: Internet Protocol, English abbreviation: IP) address anchor, for example: router. In order to provide an optimized user plane path for the user equipment (English name: User Equipment, English abbreviation: UE), it is proposed that when the network area where the UE is located changes, the UE is allowed to be re-established without affecting service continuity. Select the scheme for the IP address anchor.

一种相关的方案如下：网络部署时，多个UP都可以访问一个接入点名称(英文全称：Access Point Name，英文缩写：APN)(假设此处为APN1)所对应的分组数据网(英文全称：Packet Data Network，英文缩写：PDN)。UE附着到第一网络区域之后，为UE所要连接的APN1选择一个UP1，并建立PDN连接(假设为第一PDN连接)；当UE移动到第二网络区域时，可以为UE的该APN1再选择一个第二网络区域的UP2，并通过UP2建立PDN连接(假设为第二PDN连接)，同时为了保证第一PDN连接上业务的连续性，还需要维护第一PDN连接。若UE由第二网络区域移动到第三网络区域，可以为UE的该APN1再选择一个第三网络区域的UP3，并通过UP3建立PDN连接(假设为第三PDN连接)，同时为了保证第一PDN和第二PDN连接上业务的连续性，还需要维护第一PDN连接和第二PDN连接。A related solution is as follows: when the network is deployed, multiple UPs can access a packet data network corresponding to an access point name (English name: Access Point Name, Acronym: APN) (assuming APN1 here). Full name: Packet Data Network, English abbreviation: PDN). After the UE is attached to the first network area, select one UP1 for the APN1 to which the UE is to be connected, and establish a PDN connection (assumed to be the first PDN connection); when the UE moves to the second network area, the UE may select the APN1 for the UE. The UP2 of the second network area is established, and the PDN connection is established through the UP2 (assumed to be the second PDN connection). In order to ensure the continuity of the service on the first PDN connection, the first PDN connection needs to be maintained. If the UE is moved from the second network area to the third network area, the UP3 of the third network area may be selected for the APN1 of the UE, and the PDN connection is established through the UP3 (assumed to be the third PDN connection), and the first The continuity of the service on the PDN and the second PDN connection also requires maintaining the first PDN connection and the second PDN connection.

然而，UE从第一网络区域移动到第二网络区域后，虽然为UE建立了第二PDN连接，但是，UE从第二网络区域移动到第三网络区域之前可能并没有使用第二PDN连接进行业务传输，而UE移动到第三网络区域之后实质上是不需要使用第二PDN连接的，由此造成网络资源的浪费。另外，当UE从第三网络区域移动回到第二网络区域，第二网络区域存在多个PDN连接，UE不知道选择哪个PDN连接进行业务传输。However, after the UE moves from the first network area to the second network area, although the second PDN connection is established for the UE, the UE may not use the second PDN connection before moving from the second network area to the third network area. Traffic is transmitted, and the UE does not need to use the second PDN connection after moving to the third network area, thereby causing waste of network resources. In addition, when the UE moves from the third network area back to the second network area, there are multiple PDN connections in the second network area, and the UE does not know which PDN connection is selected for service transmission.

发明内容Summary of the invention

本发明实施例提供了分组数据网PDN连接建立的方法、控制面CP及用户设备UE，能够解决因为建立却不被使用的PDN连接导致的资源的浪费问题，以及解决了如何选择PDN连接进行业务传输的问题。The embodiment of the present invention provides a method for establishing a PDN connection of a packet data network, a control plane CP, and a user equipment UE, which can solve the problem of waste of resources caused by establishing a PDN connection that is not used, and how to select a PDN connection for service. Transmission problem.

本发明第一方面提供了一种分组数据网PDN连接建立的方法，该方法包括：控制面CP 根据用户设备UE所处的网络区域为所述UE选择目标PDN连接，其中，UE具有一个或多个可用的PDN连接，目标PDN连接为可用的PDN连接中的一个优先使用的PDN连接，目标PDN连接可能已经被建立，也可能还未被建立；所述CP向所述UE发送指示信息，所述指示信息用于指示所述UE通过所述目标PDN连接进行业务传输；若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，也即是UE有业务需求时，所述CP接收所述UE根据所述指示信息发送的用于建立所述目标PDN连接的请求；所述CP根据接收到的请求建立所述目标PDN。A first aspect of the present invention provides a method for establishing a PDN connection of a packet data network, the method comprising: a control plane CP Selecting a target PDN connection for the UE according to a network area in which the user equipment UE is located, where the UE has one or more available PDN connections, and the target PDN connection is a preferential PDN connection of the available PDN connections, the target PDN The connection may have been established or may not be established; the CP sends indication information to the UE, the indication information is used to indicate that the UE performs service transmission through the target PDN connection; if the target PDN connection If the UE is to be configured to perform the service transmission, that is, when the UE has a service requirement, the CP receives a request for establishing the target PDN connection sent by the UE according to the indication information; The CP establishes the target PDN according to the received request.

与现有技术不同，只有在有业务需求时才建立目标PDN，由此可以解决因为建立却不被使用的PDN连接导致的资源的浪费问题。同时，通过UE所处的网络区域选择目标PDN连接，从而解决了如何选择PDN连接进行业务传输的问题。Different from the prior art, the target PDN is established only when there is a business requirement, thereby solving the problem of waste of resources caused by establishing a PDN connection that is not used. At the same time, the target PDN connection is selected through the network area where the UE is located, thereby solving the problem of how to select the PDN connection for service transmission.

在一些可能的实现方式中，所述控制面CP根据用户设备UE所处的网络区域为所述UE选择目标PDN连接之前包括：当所述UE从第一网络区域移动时，UE有可能移动到其他的网络区域，此时，所述CP判断所述UE是否移动到第二网络区域，所述第二网络区域为未建立过与所述UE相关联的PDN连接的网络区域；所述控制面CP根据用户设备UE所处的网络区域为所述UE选择PDN连接包括：若所述UE移动到所述第二网络区域，则所述CP根据所述第二网络区域为所述UE选择目标PDN连接，所述目标PDN连接为未建立的PDN连接。In some possible implementations, before the control plane CP selects a target PDN connection for the UE according to the network area where the user equipment UE is located, the UE may move to the UE when the UE moves from the first network area. The other network area, at this time, the CP determines whether the UE moves to the second network area, where the second network area is a network area that has not established a PDN connection associated with the UE; the control plane The selecting, by the CP, the PDN connection for the UE according to the network area where the user equipment UE is located includes: if the UE moves to the second network area, the CP selects a target PDN for the UE according to the second network area. Connect, the target PDN connection is an unestablished PDN connection.

在另一些可能的实现方式中，所述指示信息携带有所述目标PDN连接对应的接入点名称APN以及用于指示所述UE能够建立所述目标PDN连接的信息，此时，目标PDN连接未建立。In other possible implementation manners, the indication information carries an access point name APN corresponding to the target PDN connection and information used to indicate that the UE can establish the target PDN connection, and at this time, the target PDN connection Not established.

其中，用于指示所述UE能够建立所述目标PDN连接的信息可以为preferred PDN connection<new>指示信息，preferred PDN connection<new>的作用是：用于指示UE可以建立一个比已有的PDN连接更优的一个新的PDN连接，但不要求UE立即发起新的PDN连接的建立。The information used to indicate that the UE can establish the target PDN connection may be the preferred PDN connection <new> indication information, and the role of the preferred PDN connection<new> is to indicate that the UE can establish a PDN than the existing PDN. A new PDN connection is better connected, but the UE is not required to immediately initiate the establishment of a new PDN connection.

在另一些可能的实现方式中，所述方法还包括：若所述目标PDN连接已建立，说明此时不需要再建立PDN连接，则所述CP控制所述UE通过所述目标PDN连接进行业务传输。In other possible implementations, the method further includes: if the target PDN connection is established, indicating that the PDN connection does not need to be established at this time, the CP controls the UE to perform the service by using the target PDN connection. transmission.

在另一些可能的实现方式中，所述控制面CP根据用户设备UE所处的网络区域为所述UE选择目标PDN连接之前包括：当所述UE从所述第一网络区域移动时，UE有可能移动到其他的网络区域，此时，所述CP判断所述UE是否移动到第三网络区域，所述第三网络区域为已建立过与所述UE相关联的PDN连接的网络区域；所述控制面CP根据用户设备UE所处的网络区域为所述UE选择PDN连接包括：若所述UE移动到所述第三网络区域，则所述CP根据所述第三网络区域为所述UE选择目标PDN连接，所述目标PDN连接为所述第三网络区域中已建立的PDN连接中的一个PDN连接。In other possible implementations, before the control plane CP selects a target PDN connection for the UE according to the network area where the user equipment UE is located, the UE includes: when the UE moves from the first network area, the UE has It is possible to move to another network area. At this time, the CP determines whether the UE moves to a third network area, where the third network area is a network area that has established a PDN connection associated with the UE; The selecting, by the control plane, the PDN connection for the UE according to the network area where the user equipment UE is located includes: if the UE moves to the third network area, the CP is the UE according to the third network area. A target PDN connection is selected, the target PDN connection being one of the established PDN connections in the third network region.

在另一些可能的实现方式中，所述指示信息携带有所述目标PDN连接对应的接入点名称APN以及用于指示所述目标PDN连接为具有最高优先级的PDN连接的标识，此时，目标PDN连接已经建立，且为具有最高优先级的PDN连接。In other possible implementations, the indication information carries an access point name APN corresponding to the target PDN connection and an identifier used to indicate that the target PDN connection is the PDN connection with the highest priority. The target PDN connection has been established and is the PDN connection with the highest priority.

其中，用于指示所述目标PDN连接为具有最高优先级的PDN连接的标识可以为preferred PDN connection<PDN connection id>，标识的作用是：对于一个APN，当存在多个对应的PDN连接时，指示给UE应当优选选择哪个PDN连接。The identifier used to indicate that the target PDN connection is the highest priority PDN connection may be preferred PDN connection <PDN connection id>, and the identifier is used for: When a plurality of corresponding PDN connections are made, it indicates to the UE which PDN connection should be preferably selected.

本发明第二方面提供了一种分组数据网PDN连接建立的方法，该方法包括：用户设备UE接收控制面CP发送的指示信息，所述指示信息用于指示所述UE通过目标PDN连接进行业务传输，所述目标PDN连接为所述CP根据所述UE所处的网络区域为所述UE从可用的PDN连接中选择的一个PDN连接；目标PDN连接可以为UE所处的网络区域中已建立的多个PDN连接中的一个PDN连接，目标PDN连接也可以为UE所处的网络区域中待新建的一个PDN连接；若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，所述UE根据所述指示信息向所述CP发送用于建立所述目标PDN连接的请求，以使得所述CP根据接收到的请求建立所述目标PDN连接。A second aspect of the present invention provides a method for establishing a PDN connection of a packet data network, where the method includes: the user equipment UE receives the indication information sent by the control plane CP, and the indication information is used to indicate that the UE performs the service through the target PDN connection. Transmitting, the target PDN connection is a PDN connection selected by the CP from the available PDN connection according to the network area where the UE is located; the target PDN connection may be established in the network area where the UE is located One PDN connection of the plurality of PDN connections, the target PDN connection may also be a PDN connection to be newly established in the network area where the UE is located; if the target PDN connection is not established, when the UE is to perform the service And transmitting, by the UE, a request for establishing the target PDN connection to the CP according to the indication information, so that the CP establishes the target PDN connection according to the received request.

在一些可能的实现方式中，所述UE根据所述指示信息向所述CP发送用于建立所述目标PDN连接的请求之后包括：所述UE接收所述CP返回的所述目标PDN连接的标识，并将所述目标PDN连接设置为具有最高优先级的PDN连接，所述目标PDN连接的标识为所述CP根据接收到的请求建立所述目标PDN连接后，为所述目标PDN连接分配的标识。In some possible implementations, after the sending, by the UE, the request for establishing the target PDN connection to the CP according to the indication information, the UE includes: receiving, by the UE, an identifier of the target PDN connection returned by the CP And setting the target PDN connection as the PDN connection with the highest priority, and the identifier of the target PDN connection is allocated for the target PDN connection after the CP establishes the target PDN connection according to the received request. Logo.

在另一些可能的实现方式中，所述方法还包括：若所述目标PDN连接已建立，则所述UE通过所述目标PDN连接进行业务传输。In another possible implementation manner, the method further includes: if the target PDN connection is established, the UE performs a service transmission by using the target PDN connection.

本发明第三方面提供了一种控制面CP，包括：A third aspect of the present invention provides a control plane CP, including:

选择模块，用于根据用户设备UE所处的网络区域为所述UE选择目标PDN连接，其中，UE具有一个或多个可用的PDN连接，目标PDN连接为可用的PDN连接中的一个优先使用的PDN连接，目标PDN连接可能已经被建立，也可能还未被建立；And a selecting module, configured to select a target PDN connection for the UE according to a network area where the user equipment UE is located, where the UE has one or more available PDN connections, and the target PDN connection is preferentially used by one of the available PDN connections. PDN connection, the target PDN connection may have been established or may not have been established;

发送模块，用于向所述UE发送指示信息，所述指示信息用于指示所述UE通过所述目标PDN连接进行业务传输；a sending module, configured to send, to the UE, indication information, where the indication information is used to indicate that the UE performs a service transmission by using the target PDN connection;

接收模块，用于若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，也即是UE有业务需求时，接收所述UE根据所述指示信息发送的用于建立所述目标PDN连接的请求；a receiving module, configured to: when the target PDN connection is not established, when the UE is to perform the service transmission, that is, when the UE has a service requirement, receive, by the UE, according to the indication information, used to establish a request for the target PDN connection;

建立模块，用于根据接收到的请求建立所述目标PDN。And establishing a module, configured to establish the target PDN according to the received request.

在一些可能的实现方式中，所述CP还包括：In some possible implementation manners, the CP further includes:

第一判断模块，用于当所述UE从第一网络移动时，UE有可能移动到其他的网络区域，此时，判断所述UE是否移动到第二网络区域，所述第二网络区域为未建立过与所述UE相关联的PDN连接的网络区域；a first determining module, configured to: when the UE moves from the first network, the UE may move to another network area, where it is determined whether the UE moves to the second network area, where the second network area is A network area for which a PDN connection associated with the UE is not established;

所述选择模块，具体用于若所述UE移动到所述第二网络区域，则根据所述第二网络区域为所述UE选择目标PDN连接，所述目标PDN连接为未建立的PDN连接。 The selecting module is specifically configured to: if the UE moves to the second network area, select a target PDN connection for the UE according to the second network area, where the target PDN connection is an unestablished PDN connection.

在另一些可能的实现方式中，所述CP还包括：In other possible implementation manners, the CP further includes:

控制模块，用于若所述目标PDN连接已建立，说明此时不需要再建立PDN连接，则当所述UE将进行业务传输时，控制所述UE通过所述目标PDN连接进行业务传输。And a control module, configured to: if the target PDN connection is established, indicating that the PDN connection does not need to be established at this time, when the UE performs the service transmission, the UE is controlled to perform the service transmission by using the target PDN connection.

第二判断模块，用于当所述UE从所述第一网络区域移动时，UE有可能移动到其他的网络区域，此时，判断所述UE是否移动到第三网络区域，所述第三网络区域为已建立过与所述UE相关联的PDN连接的网络区域；a second determining module, configured to: when the UE moves from the first network area, the UE may move to another network area, and at this time, determine whether the UE moves to the third network area, where the third The network area is a network area in which a PDN connection associated with the UE has been established;

所述选择模块，具体用于若所述UE移动到所述第三网络区域，则根据所述第三网络区域为所述UE选择目标PDN连接，所述目标PDN连接为所述第三网络区域中已建立的PDN连接中的一个PDN连接。The selecting module is specifically configured to: if the UE moves to the third network area, select a target PDN connection for the UE according to the third network area, where the target PDN connection is the third network area One of the PDN connections in the established PDN connection.

其中，用于指示所述目标PDN连接为具有最高优先级的PDN连接的标识可以为preferred PDN connection<PDN connection id>，标识的作用是：对于一个APN，当存在多个对应的PDN连接时，指示给UE应当优选选择哪个PDN连接。The identifier used to indicate that the target PDN connection is the PDN connection with the highest priority may be the preferred PDN connection <PDN connection id>, and the identifier is used to: when there are multiple corresponding PDN connections for one APN, Indicates which PDN connection should be preferably selected by the UE.

本发明第四方面提供了一种用户设备UE，包括：A fourth aspect of the present invention provides a user equipment UE, including:

第一接收模块，用于接收控制面CP发送的指示信息，所述指示信息用于指示所述UE通过目标PDN连接进行业务传输，所述目标PDN连接为所述CP根据所述UE所处的网络区域为所述UE从可用的PDN连接中选择的一个PDN连接；目标PDN连接可以为UE所处的网络区域中已建立的多个PDN连接中的一个PDN连接，目标PDN连接也可以为UE所处的网络区域中待新建的一个PDN连接；a first receiving module, configured to receive indication information sent by the control plane CP, where the indication information is used to indicate that the UE performs a service transmission by using a target PDN connection, where the target PDN connection is the CP according to the UE The network area is one PDN connection selected by the UE from the available PDN connections; the target PDN connection may be one of a plurality of PDN connections established in the network area where the UE is located, and the target PDN connection may also be a UE. A PDN connection to be newly created in the network area where it is located;

发送模块，用于若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，根据所述指示信息向所述CP发送用于建立所述目标PDN连接的请求，以便所述CP根据接收到的请求建立所述目标PDN连接。a sending module, configured to send, when the UE performs the service transmission, a request for establishing the target PDN connection according to the indication information, if the target PDN connection is not established, so that The CP establishes the target PDN connection according to the received request.

在一些可能的实现方式中，所述UE还包括：In some possible implementation manners, the UE further includes:

第二接收模块，用于接收所述CP返回的所述目标PDN连接的标识； a second receiving module, configured to receive an identifier of the target PDN connection returned by the CP;

处理模块，用于将所述目标PDN连接设置为具有最高优先级的PDN连接；a processing module, configured to set the target PDN connection to a PDN connection with the highest priority;

其中，所述目标PDN连接的标识为所述CP根据接收到的请求建立所述目标PDN连接后，为所述目标PDN连接分配的标识。The identifier of the target PDN connection is an identifier that is allocated to the target PDN connection after the CP establishes the target PDN connection according to the received request.

在另一些可能的实现方式中，所述UE还包括：In other possible implementation manners, the UE further includes:

传输模块，用于若所述目标PDN连接已建立，则通过所述目标PDN连接进行业务传输。And a transmission module, configured to perform service transmission by using the target PDN connection if the target PDN connection is established.

从以上技术方案可以看出，本发明实施例具有以下优点：只有在有业务需求时才建立目标PDN，由此可以解决因为建立却不被使用的PDN连接导致的资源的浪费问题。同时，通过UE所处的网络区域选择目标PDN连接，从而解决了如何选择PDN连接进行业务传输的问题。As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages: the target PDN is established only when there is a service requirement, thereby solving the problem of waste of resources caused by establishing a PDN connection that is not used. At the same time, the target PDN connection is selected through the network area where the UE is located, thereby solving the problem of how to select the PDN connection for service transmission.

附图说明DRAWINGS

图1为本发明实施例提供的CU分离的网络架构示意图；1 is a schematic diagram of a network architecture of a CU separation according to an embodiment of the present invention;

图2为本发明实施例分组数据网PDN连接建立的方法一个实施例示意图；2 is a schematic diagram of an embodiment of a method for establishing a PDN connection of a packet data network according to an embodiment of the present invention;

图3为本发明实施例UE由第一网络区域移动到第二网络区域过程中CP和UE之间进行信息交互的示意图；3 is a schematic diagram of information interaction between a CP and a UE during a process in which a UE moves from a first network area to a second network area according to an embodiment of the present invention;

图4为本发明实施例UE由第一网络区域移动到第三网络区域过程中CP和UE之间进行信息交互的示意图；4 is a schematic diagram of information interaction between a CP and a UE in a process of moving a UE from a first network area to a third network area according to an embodiment of the present invention;

图5为本发明实施例PDN连接的建立过程示意图；FIG. 5 is a schematic diagram of a process of establishing a PDN connection according to an embodiment of the present invention; FIG.

图6为本发明实施例控制面CP的一个实施例示意图；FIG. 6 is a schematic diagram of an embodiment of a control plane CP according to an embodiment of the present invention; FIG.

图7为本发明实施例控制面CP的另一个实施例示意图；FIG. 7 is a schematic diagram of another embodiment of a control plane CP according to an embodiment of the present invention; FIG.

图8为本发明实施例控制面CP的另一个实施例示意图；FIG. 8 is a schematic diagram of another embodiment of a control plane CP according to an embodiment of the present invention; FIG.

图9为本发明实施例控制面CP的另一个实施例示意图；FIG. 9 is a schematic diagram of another embodiment of a control plane CP according to an embodiment of the present invention; FIG.

图10为本发明实施例用户设备UE的一个实施例示意图；FIG. 10 is a schematic diagram of an embodiment of a user equipment UE according to an embodiment of the present invention;

图11为本发明实施例用户设备UE的另一个实施例示意图；FIG. 11 is a schematic diagram of another embodiment of a user equipment UE according to an embodiment of the present invention;

图12为本发明实施例用户设备UE的另一个实施例示意图；FIG. 12 is a schematic diagram of another embodiment of a user equipment UE according to an embodiment of the present invention;

图13为本发明实施例用户设备UE的另一个实施例示意图。FIG. 13 is a schematic diagram of another embodiment of a user equipment UE according to an embodiment of the present invention.

具体实施方式detailed description

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、 “第四”等(如果存在)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。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、***、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。The terms "first", "second", "third", in the specification and claims of the present invention and the above drawings, "Fourth" and the like (if present) are used to distinguish similar objects and are not necessarily used to describe a particular order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

本发明主要应用于CU分离的网络架构中，一种常见的CU分离的网络架构示意图可以参见图1，图1中CP采用集中方式部署，UP采用分布式方式部署。CP是网络的控制节点，负责网络控制相关的功能，例如，移动性管理控制以及会话管理控制等；UP是网络的用户面，负责用户数据的处理，例如，负责用户数据的转发，作为IP地址锚点。接入网(英文全称:Access Network，英文缩写：AN)负责UE的接入，DN为数据网络。The present invention is mainly applied to a CU-separated network architecture. A common CU-separated network architecture diagram can be seen in FIG. 1. The CP in FIG. 1 is deployed in a centralized manner, and the UP is deployed in a distributed manner. The CP is the control node of the network and is responsible for network control related functions, such as mobility management control and session management control. UP is the user plane of the network and is responsible for the processing of user data, for example, responsible for forwarding user data as an IP address. Anchor point. The access network (English name: Access Network, English abbreviation: AN) is responsible for the access of the UE, and the DN is the data network.

下面结合具体实施例对本发明分组数据网PDN连接建立的方法进行描述，请参阅图2，本发明实施例中分组数据网PDN连接建立的方法一个实施例包括：A method for establishing a PDN connection of a packet data network according to the present invention is described below with reference to a specific embodiment. Referring to FIG. 2, an embodiment of a method for establishing a PDN connection of a packet data network in an embodiment of the present invention includes:

101、控制面CP根据用户设备UE所处的网络区域为UE选择目标PDN连接；101. The control plane CP selects a target PDN connection for the UE according to the network area where the user equipment UE is located.

本实施例中，当UE有多个可用的PDN连接时，目标PDN连接为多个PDN连接中的一个被设置为优先使用的PDN连接，当UE仅有一个可用的PDN连接时，目标PDN连接为该可用的PDN连接。目标PDN连接可能已经被建立，也可能还未被建立，此处不作限定。In this embodiment, when the UE has multiple available PDN connections, the target PDN connection is a PDN connection that is set to be preferentially used by one of the plurality of PDN connections, and the target PDN connection is when the UE has only one available PDN connection. Connect for this available PDN. The target PDN connection may or may not have been established and is not limited herein.

需要说明的是，网络区域中的多个UP都可以访问一个APN所对应的PDN，由于每个UP都有本身所服务的网络区域，所以CP可以根据UE所处的网络区域选择UP，进而通过UP确定PDN连接。It should be noted that multiple UPs in the network area can access the PDN corresponding to one APN. Since each UP has its own network area, the CP can select UP according to the network area where the UE is located, and then pass the UP determines the PDN connection.

102、CP向UE发送指示信息，该指示信息用于指示UE通过目标PDN连接进行业务传输；The CP sends the indication information to the UE, where the indication information is used to indicate that the UE performs the service transmission by using the target PDN connection.

本实施例中，在CP根据UE所处的网络区域为UE选择目标PDN连接之后，CP向UE发送指示信息，该指示信息用于指示UE通过目标PDN连接进行业务传输。In this embodiment, after the CP selects the target PDN connection for the UE according to the network area where the UE is located, the CP sends the indication information to the UE, where the indication information is used to indicate that the UE performs the service transmission through the target PDN connection.

103、若目标PDN连接未建立，则当UE将进行业务传输时，UE根据指示信息向CP发送用于建立目标PDN连接的请求；103. If the target PDN connection is not established, when the UE performs the service transmission, the UE sends a request for establishing the target PDN connection to the CP according to the indication information.

本实施例中，UE将进行业务传输可以具体为：UE将进行新的业务传输，或UE将进行旧的不需要网络侧提供业务连续性支持的业务传输。In this embodiment, the UE may perform the service transmission, where the UE may perform a new service transmission, or the UE performs an old service transmission that does not require the network continuity to provide service continuity support.

由于目标PDN连接未建立，而UE需要通过目标PDN连接进行业务传输，所以UE向CP发送用于建立目标PDN连接的请求。Since the target PDN connection is not established and the UE needs to perform traffic transmission through the target PDN connection, the UE sends a request for establishing a target PDN connection to the CP.

104、CP根据接收到的请求建立目标PDN。104. The CP establishes a target PDN according to the received request.

本实施例中，CP根据接收到的请求建立目标PDN连接后，UE可以通过目标PDN连接进行业务传输。In this embodiment, after the CP establishes a target PDN connection according to the received request, the UE may perform service transmission through the target PDN connection.

本实施例中，只有在有业务需求时才建立目标PDN，由此可以解决因为建立却不被使用的PDN连接导致的资源的浪费问题。同时，通过UE所处的网络区域选择目标PDN连接，从而解决了如何选择PDN连接进行业务传输的问题。In this embodiment, the target PDN is established only when there is a service requirement, thereby solving the problem of waste of resources caused by establishing a PDN connection that is not used. At the same time, the target PDN connection is selected through the network area where the UE is located, thereby solving the problem of how to select the PDN connection for service transmission.

在上述图2对应的实施例的基础上，本发明实施例中分组数据网PDN连接建立的方法第一个可选实施例中，所述控制面CP根据用户设备UE所处的网络区域为UE选择目标PDN连接之前包括：On the basis of the foregoing embodiment corresponding to FIG. 2, the method for establishing a PDN connection of a packet data network in the embodiment of the present invention In the first optional embodiment, before the control plane CP selects the target PDN connection for the UE according to the network area where the user equipment UE is located, the control plane CP includes:

当UE从第一网络区域移动时，CP判断UE是否移动到第二网络区域，第二网络区域为未建立过与UE相关联的PDN连接的网络区域；When the UE moves from the first network area, the CP determines whether the UE moves to the second network area, and the second network area is a network area that has not established a PDN connection associated with the UE;

所述控制面CP根据用户设备UE所处的网络区域为UE选择目标PDN连接包括：The selecting, by the control plane CP, the target PDN connection for the UE according to the network area where the user equipment UE is located includes:

若UE移动到第二网络区域，则CP根据第二网络区域为UE选择目标PDN连接，目标PDN连接为未建立的PDN连接。If the UE moves to the second network area, the CP selects a target PDN connection for the UE according to the second network area, and the target PDN connection is an unestablished PDN connection.

进一步的，该指示信息携带有目标PDN连接对应的接入点名称APN以及用于指示UE能够建立目标PDN连接的信息。Further, the indication information carries an access point name APN corresponding to the target PDN connection and information used to indicate that the UE can establish a target PDN connection.

为了便于理解上述分组数据网PDN连接建立的方法第一个可选实施例，下面通过一个具体实例进行说明，请参阅图3，图3为UE由第一网络区域移动到第二网络区域过程中CP和UE之间进行信息交互的示意图。In order to facilitate the understanding of the first optional embodiment of the method for establishing a PDN connection of the packet data network, the following is a specific example. Referring to FIG. 3, FIG. 3 is a process in which the UE moves from the first network area to the second network area. Schematic diagram of information exchange between the CP and the UE.

图3包括5个步骤，其中，步骤1：CP在第一网络区域已经为UE建立了连接到APN的PDN连接，对应的用户面为UP-O，图3中还包括其他用户面，比如UP-N，UP-N-O。步骤2：UE从第一网络区域发生移动。步骤3：当UE发生移动后，CP判断UE是否移动到第二网络区域，其中第二网络区域为未建立过与UE相关联的PDN连接的网络区域，若移动到第二网络区域，则CP确定需要为UE所连接的APN建立选择一个新的UP并建立新的PDN连接(即目标PDN连接)。由于每个UP都有本身所服务的网络区域，所以CP可以根据第二网络区域为UE选择新的UP，进而确定新的PDN连接。步骤4、CP通知UE可以在第二网络区域使用新的UP来建立一个新的PDN连接。通知中所携带的信息包括：PDN连接所对应的APN，PDN连接指示，PDN连接指示可以为preferred PDN connection<new>指示，其中PDN连接指示的作用是：用于指示UE可以建立一个比已有的PDN连接更优的一个新的PDN连接，但不要求UE立即发起新的PDN连接的建立。步骤5、UE保存在步骤4中接收到的通知信息。FIG. 3 includes five steps. Step 1: The CP has established a PDN connection to the APN for the UE in the first network area, and the corresponding user plane is UP-O. FIG. 3 also includes other user planes, such as UP. -N, UP-NO. Step 2: The UE moves from the first network area. Step 3: After the UE moves, the CP determines whether the UE moves to the second network area, where the second network area is a network area that has not established a PDN connection associated with the UE, and if it moves to the second network area, the CP It is determined that a new UP needs to be established for the APN connection established by the UE and a new PDN connection (ie, a target PDN connection) is established. Since each UP has its own network area, the CP can select a new UP for the UE according to the second network area, thereby determining a new PDN connection. Step 4: The CP notifies the UE that a new UP may be used in the second network area to establish a new PDN connection. The information carried in the notification includes: an APN corresponding to the PDN connection, a PDN connection indication, and the PDN connection indication may be a preferred PDN connection <new> indication, where the PDN connection indication is used to indicate that the UE can establish a ratio than the existing one. The PDN connection is better for a new PDN connection, but does not require the UE to immediately initiate the establishment of a new PDN connection. Step 5: The UE saves the notification information received in step 4.

在上述图2对应的实施例的基础上，本发明实施例中分组数据网PDN连接建立的方法第二个可选实施例中，若目标PDN连接已建立，则CP控制UE通过目标PDN连接进行业务传输。On the basis of the foregoing embodiment corresponding to FIG. 2, in the second optional embodiment of the packet data network PDN connection establishment in the embodiment of the present invention, if the target PDN connection is established, the CP controls the UE to perform the target PDN connection. Business transmission.

进一步的，所述控制面CP根据用户设备UE所处的网络区域为UE选择目标PDN连接之前包括：Further, before the control plane CP selects the target PDN connection for the UE according to the network area where the user equipment UE is located, the control plane CP includes:

当UE从第一网络区域移动时，CP判断UE是否移动到第三网络区域，第三网络区域为已建立过与UE相关联的PDN连接的网络区域；When the UE moves from the first network area, the CP determines whether the UE moves to the third network area, and the third network area is a network area that has established a PDN connection associated with the UE;

若UE移动到第三网络区域，则CP根据第三网络区域为UE选择目标PDN连接，目标PDN连接为第三网络区域中已建立的PDN连接中的一个PDN；连接。If the UE moves to the third network area, the CP selects a target PDN connection for the UE according to the third network area, and the target PDN is connected to one of the established PDN connections in the third network area;

进一步的，该指示信息携带有目标PDN连接对应的接入点名称APN以及用于指示目标PDN连接为最高优先级的PDN连接的标识。Further, the indication information carries an access point name APN corresponding to the target PDN connection and an identifier of the PDN connection used to indicate that the target PDN connection is the highest priority.

为了便于理解上述分组数据网PDN连接建立的方法第二个可选实施例，下面通过一个具体实例进行说明，请参阅图4，图4为UE由第一网络区域移动到第三网络区域过程中CP 和UE之间进行信息交互的示意图。In order to facilitate the understanding of the second optional embodiment of the method for establishing a PDN connection of the packet data network, the following is a specific example. Referring to FIG. 4, FIG. 4 is a process in which the UE moves from the first network area to the third network area. CP Schematic diagram of information interaction with the UE.

图4包括5个步骤，其中，步骤1：CP在第三网络区域已经为UE建立了连接到APN的PDN连接，对应的用户面为UP-O，图4中还包括其他用户面，比如UP-N，UP-N-O。步骤2：UE从第一网络区域发生移动。步骤3：当UE发生移动后，CP判断UE是否移动到第三网络区域，若移动到第三网络区域，由于CP在第三网络区域已经为UE建立了连接到APN的PDN连接，所以CP不会再给UE新建一个PDN连接，而是将已经建立的第三网络区域中的PDN连接指示给UE。步骤4：CP将第三网络区域中的PDN连接通知给UE，通知中所携带的参数包括：第三网络区域中的PDN连接所对应的APN以及标识，标识可以为preferred PDN connection<PDN connection id>，标识的作用是：对于一个APN，当存在多个对应的PDN连接时，指示给UE应当优选选择哪个PDN连接。步骤5：UE保存在步骤4中接收到的通知信息，对于一个APN，UE只保存一个标识，如果UE之前已经保存了一个标识，UE再保存新的标识时，新的标识会替换UE之前保存的标识。Figure 4 includes five steps. Step 1: The CP has established a PDN connection to the APN for the UE in the third network area. The corresponding user plane is UP-O. Figure 4 also includes other user planes, such as UP. -N, UP-NO. Step 2: The UE moves from the first network area. Step 3: After the UE moves, the CP determines whether the UE moves to the third network area. If the mobile station moves to the third network area, the CP does not establish a PDN connection to the APN for the UE in the third network area, so the CP does not A new PDN connection is added to the UE, and the PDN connection in the established third network area is indicated to the UE. Step 4: The CP notifies the PDN connection in the third network area to the UE, and the parameters carried in the notification include: an APN corresponding to the PDN connection in the third network area and an identifier, and the identifier may be a preferred PDN connection <PDN connection id The role of the identity is that for an APN, when there are multiple corresponding PDN connections, it indicates to the UE which PDN connection should be preferably selected. Step 5: The UE saves the notification information received in step 4. For an APN, the UE only saves one identifier. If the UE has previously saved an identifier and the UE saves the new identifier, the new identifier is saved before the UE is replaced. Logo.

在上述图2对应的实施例的基础上，本发明实施例中分组数据网PDN连接建立的方法第三个可选实施例中，所述UE根据指示信息向CP发送用于建立目标PDN连接的请求之后包括：On the basis of the foregoing embodiment corresponding to FIG. 2, in a third optional embodiment of the method for establishing a PDN connection in a packet data network in the embodiment of the present invention, the UE sends a target PDN connection to the CP according to the indication information. After the request includes:

UE接收CP返回的目标PDN连接的标识，并将目标PDN连接设置为具有最高优先级的PDN连接，目标PDN连接的标识为CP根据接收到的请求建立目标PDN连接后，为目标PDN连接分配的标识。The UE receives the identifier of the target PDN connection returned by the CP, and sets the target PDN connection as the PDN connection with the highest priority. The identifier of the target PDN connection is allocated for the target PDN connection after the CP establishes the target PDN connection according to the received request. Logo.

为了便于理解上述分组数据网PDN连接建立的方法第三个可选实施例，下面通过一个具体实例进行说明，在上述图3和图4的基础上，请参阅图5，图5为PDN连接的建立过程示意图。In order to facilitate the understanding of the third alternative embodiment of the method for establishing a PDN connection of the packet data network, the following is described by way of a specific example. Referring to FIG. 3 and FIG. 4 above, refer to FIG. 5, and FIG. 5 is a PDN connection. Establish a schematic diagram of the process.

图5包括11个步骤，其中，步骤1：CP在某个网络区域已经为UE建立了连接到APN的PDN连接，对应的用户面为UP-O，图5中还包括其他用户面，比如UP-N，UP-N-O。步骤2：当UE在当前网络区域将要开始新的业务传输、或者旧的业务传输不需要网络侧提供业务连续性支持的时候，UE判断是否需要建立新的PDN连接，若需要，则将新的业务或者旧的不需要网络侧提供业务连续性支持的业务放在新的PDN上传输。步骤3：如果UE保存了图3中的PDN连接指示，即preferred PDN connection<new>指示，则说明UE可以在当前网络区域建立新的PDN连接。步骤4：UE向CP发送用于建立新的PDN连接的请求消息，请求消息中携带有新的PDN连接的APN信息以及新的PDN建立的指示信息。步骤5：CP接收到请求消息后，根据请求消息判断是否需要在当前网络区域为UE选择一个UP并建立新的PDN连接，若需要，则执行步骤6。步骤6：建立新的PDN连接。步骤7：新的PDN连接建立完成后，CP向UE发送新的PDN连接建立响应消息，其中包括了CP为该新的PDN连接分配的标识。步骤8：新的PDN连接建立完成后，UE使用新的PDN连接进行数据传输。步骤9：UE保存CP返回的为新的PDN连接分配的标识，并将新的PDN连接设置为最高优先级的PDN连接。步骤10：如果步骤2的判断过程中UE保存的某个PDN连接的标识(图4步骤4中的标识)，则不需要在当前网络区域建立新的PDN连接。步骤11：使用保存的PDN连接进行数据传输。 Figure 5 includes the following steps: Step 1: The CP has established a PDN connection to the APN for the UE in a certain network area, and the corresponding user plane is UP-O. Figure 5 also includes other user planes, such as UP. -N, UP-NO. Step 2: When the UE is about to start a new service transmission in the current network area, or the old service transmission does not require the network side to provide service continuity support, the UE determines whether a new PDN connection needs to be established, and if necessary, a new one. The service or the old service that does not require the network side to provide service continuity support is transmitted on the new PDN. Step 3: If the UE saves the PDN connection indication in FIG. 3, that is, the preferred PDN connection <new> indication, the UE may establish a new PDN connection in the current network area. Step 4: The UE sends a request message for establishing a new PDN connection to the CP, where the request message carries the APN information of the new PDN connection and the indication information of the new PDN establishment. Step 5: After receiving the request message, the CP determines whether it is necessary to select an UP for the UE in the current network area and establish a new PDN connection according to the request message. If necessary, perform step 6. Step 6: Establish a new PDN connection. Step 7: After the new PDN connection is established, the CP sends a new PDN connection setup response message to the UE, which includes the identifier assigned by the CP for the new PDN connection. Step 8: After the new PDN connection is established, the UE uses the new PDN connection for data transmission. Step 9: The UE saves the identifier assigned by the CP for the new PDN connection, and sets the new PDN connection as the highest priority PDN connection. Step 10: If the identifier of a certain PDN connection saved by the UE during the judgment of step 2 (identification in step 4 of FIG. 4), it is not necessary to establish a new PDN connection in the current network area. Step 11: Data transfer using the saved PDN connection.

请参阅图6，本发明实施例中控制面CP的一个实施例包括：Referring to FIG. 6, an embodiment of the control plane CP in the embodiment of the present invention includes:

选择模块201，用于根据用户设备UE所处的网络区域为所述UE选择目标PDN连接，所述目标PDN连接为可用的PDN连接中的一个PDN连接；The selecting module 201 is configured to select a target PDN connection for the UE according to a network area where the user equipment UE is located, where the target PDN connection is one of the available PDN connections;

发送模块202，用于向所述UE发送指示信息，所述指示信息用于指示所述UE通过所述目标PDN连接进行业务传输；The sending module 202 is configured to send, to the UE, indication information, where the indication information is used to indicate that the UE performs service transmission by using the target PDN connection;

接收模块203，用于若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，接收所述UE根据所述指示信息发送的用于建立所述目标PDN连接的请求；The receiving module 203 is configured to: if the target PDN connection is not established, when the UE performs the service transmission, receive a request that is sent by the UE according to the indication information, for establishing the target PDN connection;

建立模块204，用于根据接收到的请求建立所述目标PDN。The establishing module 204 is configured to establish the target PDN according to the received request.

可选的，请参阅图7，在本发明的一些实施例中，所述CP还包括：Optionally, referring to FIG. 7, in some embodiments of the present invention, the CP further includes:

第一判断模块301，用于当所述UE从第一网络移动时，判断所述UE是否移动到第二网络区域，所述第二网络区域为未建立过与所述UE相关联的PDN连接的网络区域；The first determining module 301 is configured to determine, when the UE moves from the first network, whether the UE moves to a second network area, where the second network area is that a PDN connection associated with the UE is not established. Network area;

所述选择模块201，具体用于若所述UE移动到所述第二网络区域，则根据所述第二网络区域为所述UE选择目标PDN连接，所述目标PDN连接为未建立的PDN连接。The selecting module 201 is specifically configured to: if the UE moves to the second network area, select a target PDN connection for the UE according to the second network area, where the target PDN connection is an unestablished PDN connection. .

可选的，请参阅图8，在本发明的一些实施例中，所述CP还包括：控制模块401，用于若所述目标PDN连接已建立，则控制所述UE通过所述目标PDN连接进行业务传输。Optionally, referring to FIG. 8, in some embodiments of the present invention, the CP further includes: a control module 401, configured to control, when the target PDN connection is established, to connect the UE by using the target PDN. Conduct business transactions.

进一步的，所述CP还包括：第二判断模块402，用于当所述UE从所述第一网络区域移动时，判断所述UE是否移动到第三网络区域，所述第三网络区域为已建立过与所述UE相关联的PDN连接的网络区域；Further, the CP further includes: a second determining module 402, configured to: when the UE moves from the first network area, determine whether the UE moves to a third network area, where the third network area is A network area for which a PDN connection associated with the UE has been established;

所述选择模块201，具体用于若所述UE移动到所述第三网络区域，则根据所述第三网络区域为所述UE选择目标PDN连接，所述目标PDN连接为所述第三网络区域中已建立的PDN连接中的一个PDN连接。The selecting module 201 is specifically configured to: if the UE moves to the third network area, select a target PDN connection for the UE according to the third network area, where the target PDN connection is the third network A PDN connection in an established PDN connection in the zone.

需要说明的是，上述各模块所执行的动作的说明可以参见前述方法实施例，此处不再赘述。It should be noted that the description of the operations performed by the foregoing modules may be referred to the foregoing method embodiments, and details are not described herein again.

上面从模块化功能实体的角度对本发明实施例中的CP进行了描述，下面从硬件处理的角度对本发明实施例中的CP进行描述，请参阅图9，本发明实施例中的CP包括：处理器501、发射器502以及接收器503。The CP in the embodiment of the present invention is described above from the perspective of a modular functional entity. The CP in the embodiment of the present invention is described from the perspective of hardware processing. Referring to FIG. 9, the CP in the embodiment of the present invention includes: The device 501, the transmitter 502, and the receiver 503.

本发明实施例涉及的CP可以具有比图9所示出的更多或更少的部件，可以组合两个或更多个部件，或者可以具有不同的部件配置或设置，各个部件可以在包括一个或多个信号处理和/或专用集成电路在内的硬件、软件或硬件和软件的组合实现。The CP according to an embodiment of the present invention may have more or less components than those shown in FIG. 9, may combine two or more components, or may have different component configurations or settings, and each component may include one Hardware, software, or a combination of hardware and software, including multiple signal processing and/or application specific integrated circuits.

所述处理器501用于执行如下操作：The processor 501 is configured to perform the following operations:

根据用户设备UE所处的网络区域为所述UE选择目标PDN连接，所述目标PDN连接为可用的PDN连接中的一个PDN连接。Selecting a target PDN connection for the UE according to a network area in which the user equipment UE is located, the target PDN connection being one of the available PDN connections.

所述发射器502用于执行如下操作：The transmitter 502 is configured to perform the following operations:

向所述UE发送指示信息，所述指示信息用于指示所述UE通过所述目标PDN连接进行业务传输。Sending indication information to the UE, where the indication information is used to indicate that the UE performs service transmission by using the target PDN connection.

所述接收器503用于执行如下操作：The receiver 503 is configured to perform the following operations:

若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，接收所述UE根据所述指示信息发送的用于建立所述目标PDN连接的请求。If the target PDN connection is not established, when the UE is to perform the service transmission, receiving the UE according to the UE And the indication information is sent to establish a request for the target PDN connection.

所述处理器501还用于执行如下操作：The processor 501 is further configured to perform the following operations:

根据接收到的请求建立所述目标PDN。The target PDN is established according to the received request.

可选的，所述处理器501还用于执行如下操作：当所述UE从第一网络移动时，判断所述UE是否移动到第二网络区域，所述第二网络区域为未建立过与所述UE相关联的PDN连接的网络区域；若所述UE移动到所述第二网络区域，则根据所述第二网络区域为所述UE选择目标PDN连接，所述目标PDN连接为未建立的PDN连接。Optionally, the processor 501 is further configured to: when the UE moves from the first network, determine whether the UE moves to a second network area, where the second network area is not established. a network area of the PDN connection that is associated with the UE; if the UE moves to the second network area, select a target PDN connection for the UE according to the second network area, and the target PDN connection is not established. PDN connection.

可选的，所述处理器501还用于执行如下操作：若所述目标PDN连接已建立，则控制所述UE通过所述目标PDN连接进行业务传输。Optionally, the processor 501 is further configured to: if the target PDN connection is established, control the UE to perform service transmission by using the target PDN connection.

可选的，所述处理器501还用于执行如下操作：当所述UE从所述第一网络区域移动时，判断所述UE是否移动到第三网络区域，所述第三网络区域为已建立过与所述UE相关联的PDN连接的网络区域；若所述UE移动到所述第三网络区域，则根据所述第三网络区域为所述UE选择目标PDN连接，所述目标PDN连接为所述第三网络区域中已建立的PDN连接中的一个PDN连接。Optionally, the processor 501 is further configured to: when the UE moves from the first network area, determine whether the UE moves to a third network area, where the third network area is Establishing a network area of a PDN connection associated with the UE; if the UE moves to the third network area, selecting a target PDN connection for the UE according to the third network area, the target PDN connection A PDN connection in the established PDN connection in the third network area.

需要说明的是，上述各硬件所执行的动作的说明可以参见前述方法实施例，此处不再赘述。It should be noted that the description of the operations performed by the foregoing hardware may be referred to the foregoing method embodiments, and details are not described herein again.

请参阅图10，本发明实施例中用户设备UE的一个实施例包括：Referring to FIG. 10, an embodiment of a user equipment UE in an embodiment of the present invention includes:

第一接收模块601，用于接收控制面CP发送的指示信息，所述指示信息用于指示所述UE通过目标PDN连接进行业务传输，所述目标PDN连接为所述CP根据所述UE所处的网络区域为所述UE从可用的PDN连接中选择的一个PDN连接；The first receiving module 601 is configured to receive the indication information sent by the control plane CP, where the indication information is used to indicate that the UE performs the service transmission by using the target PDN connection, where the target PDN connection is the CP according to the UE. Network area is one PDN connection selected by the UE from available PDN connections;

发送模块602，用于若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，根据所述指示信息向所述CP发送用于建立所述目标PDN连接的请求，以便所述CP根据接收到的请求建立所述目标PDN连接。The sending module 602 is configured to: when the target PDN connection is not established, send, when the UE performs the service transmission, send a request for establishing the target PDN connection to the CP according to the indication information, so that The CP establishes the target PDN connection according to the received request.

可选的，请参阅图11，在本发明的一些实施例中，所述UE还包括：Optionally, referring to FIG. 11, in some embodiments of the present invention, the UE further includes:

第二接收模块701，用于接收所述CP返回的所述目标PDN连接的标识；a second receiving module 701, configured to receive an identifier of the target PDN connection returned by the CP;

处理模块702，用于将所述目标PDN连接设置为具有最高优先级的PDN连接；The processing module 702 is configured to set the target PDN connection to be the PDN connection with the highest priority;

可选的，请参阅图12，在本发明的一些实施例中，所述UE还包括：Optionally, referring to FIG. 12, in some embodiments of the present invention, the UE further includes:

传输模块801，用于若所述目标PDN连接已建立，则通过所述目标PDN连接进行业务传输。The transmission module 801 is configured to perform service transmission by using the target PDN connection if the target PDN connection is established.

上面从模块化功能实体的角度对本发明实施例中的UE进行了描述，下面从硬件处理的角度对本发明实施例中的UE进行描述，请参阅图13，本发明实施例中的UE包括：接收器901以及发射器902。The UE in the embodiment of the present invention is described above from the perspective of a modular functional entity. The following describes the UE in the embodiment of the present invention from the perspective of hardware processing. Referring to FIG. 13, the UE in the embodiment of the present invention includes: The device 901 and the transmitter 902.

本发明实施例涉及的UE可以具有比图13所示出的更多或更少的部件，可以组合两个或更多个部件，或者可以具有不同的部件配置或设置，各个部件可以在包括一个或多个信号处理和/或专用集成电路在内的硬件、软件或硬件和软件的组合实现。The UE involved in the embodiment of the present invention may have more or less components than those shown in FIG. 13, and may combine two. The components or components may have different component configurations or arrangements, and the various components may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.

所述接收器901用于执行如下操作：接收控制面CP发送的指示信息，所述指示信息用于指示所述UE通过目标PDN连接进行业务传输，所述目标PDN连接为所述CP根据所述UE所处的网络区域为所述UE从可用的PDN连接中选择的一个PDN连接。The receiver 901 is configured to: receive indication information sent by the control plane CP, where the indication information is used to indicate that the UE performs a service transmission by using a target PDN connection, where the target PDN connection is the CP according to the The network area in which the UE is located is one PDN connection selected by the UE from available PDN connections.

所述发射器902用于执行如下操作：若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，根据所述指示信息向所述CP发送用于建立所述目标PDN连接的请求，以便所述CP根据接收到的请求建立所述目标PDN连接。The transmitter 902 is configured to: if the target PDN connection is not established, when the UE performs the service transmission, send the target PDN to the CP according to the indication information. A request to connect, so that the CP establishes the target PDN connection according to the received request.

可选的，所述接收器901还用于执行如下操作：接收所述CP返回的所述目标PDN连接的标识；Optionally, the receiver 901 is further configured to: receive an identifier of the target PDN connection returned by the CP;

所述UE还包括处理器，所述处理器用于执行如下操作：将所述目标PDN连接设置为具有最高优先级的PDN连接；其中，所述目标PDN连接的标识为所述CP根据接收到的请求建立所述目标PDN连接后，为所述目标PDN连接分配的标识。The UE further includes a processor, the processor is configured to: set the target PDN connection as a PDN connection with the highest priority; wherein the identifier of the target PDN connection is the CP according to the received An identifier assigned to the target PDN connection after the request to establish the target PDN connection.

可选的，所述处理器用于执行如下操作：若所述目标PDN连接已建立，则通过所述目标PDN连接进行业务传输。Optionally, the processor is configured to: perform service transmission by using the target PDN connection if the target PDN connection is established.

所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的装置和模块的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the foregoing apparatus and module can be referred to the corresponding process in the foregoing method embodiment, and details are not described herein again.

在本申请所提供的几个实施例中，应该理解到，所揭示的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个模块或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。In the several embodiments provided herein, it should be understood that the disclosed apparatus and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be another division manner, for example, multiple modules or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

所述作为分离部件说明的模块可以是或者也可以不是物理上分开的，作为模块显示的部件可以是或者也可以不是物理模块，即可以位于一个地方，或者也可以分布到多个网络模块上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。The modules described as separate components may or may not be physically separated. The components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

另外，在本发明各个实施例中的各功能模块可以集成在一个处理模块中，也可以是各个模块单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules.

所述集成的模块如果以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。The integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), A variety of media that can store program code, such as random access memory (RAM), disk, or optical disk.

以上所述，以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。 The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents of the technical solutions of the embodiments of the present invention.

Claims

一种分组数据网PDN连接建立的方法，其特征在于，包括：A method for establishing a PDN connection of a packet data network, comprising:

控制面CP根据用户设备UE所处的网络区域为所述UE选择目标PDN连接，所述目标PDN连接为可用的PDN连接中的一个PDN连接；The control plane CP selects a target PDN connection for the UE according to the network area where the user equipment UE is located, and the target PDN connection is one of the available PDN connections;

所述CP向所述UE发送指示信息，所述指示信息用于指示所述UE通过所述目标PDN连接进行业务传输；The CP sends the indication information to the UE, where the indication information is used to indicate that the UE performs service transmission by using the target PDN connection;

若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，所述CP接收所述UE根据所述指示信息发送的用于建立所述目标PDN连接的请求；If the target PDN connection is not established, when the UE is to perform the service transmission, the CP receives a request for establishing the target PDN connection sent by the UE according to the indication information;

所述CP根据接收到的请求建立所述目标PDN。The CP establishes the target PDN according to the received request.
根据权利要求1所述的方法，其特征在于，所述控制面CP根据用户设备UE所处的网络区域为所述UE选择目标PDN连接之前包括：The method according to claim 1, wherein the control plane CP before selecting the target PDN connection for the UE according to the network area in which the user equipment UE is located includes:

当所述UE从第一网络区域移动时，所述CP判断所述UE是否移动到第二网络区域，所述第二网络区域为未建立过与所述UE相关联的PDN连接的网络区域；When the UE moves from the first network area, the CP determines whether the UE moves to a second network area, where the second network area is a network area that has not established a PDN connection associated with the UE;

所述控制面CP根据用户设备UE所处的网络区域为所述UE选择PDN连接包括：The selecting, by the control plane, the PDN connection for the UE according to the network area where the user equipment UE is located includes:

若所述UE移动到所述第二网络区域，则所述CP根据所述第二网络区域为所述UE选择目标PDN连接，所述目标PDN连接为未建立的PDN连接。And if the UE moves to the second network area, the CP selects a target PDN connection for the UE according to the second network area, and the target PDN connection is an unestablished PDN connection.
根据权利要求2所述的方法，其特征在于，所述指示信息携带有所述目标PDN连接对应的接入点名称APN以及用于指示所述UE能够建立所述目标PDN连接的信息。The method according to claim 2, wherein the indication information carries an access point name APN corresponding to the target PDN connection and information for indicating that the UE can establish the target PDN connection.
根据权利要求1所述的方法，其特征在于，所述方法还包括：The method of claim 1 further comprising:

若所述目标PDN连接已建立，则所述CP控制所述UE通过所述目标PDN连接进行业务传输。If the target PDN connection is established, the CP controls the UE to perform service transmission through the target PDN connection.
根据权利要求4所述的方法，其特征在于，所述控制面CP根据用户设备UE所处的网络区域为所述UE选择目标PDN连接之前包括：The method according to claim 4, wherein the control plane CP before selecting the target PDN connection for the UE according to the network area in which the user equipment UE is located includes:

当所述UE从所述第一网络区域移动时，所述CP判断所述UE是否移动到第三网络区域，所述第三网络区域为已建立过与所述UE相关联的PDN连接的网络区域；When the UE moves from the first network area, the CP determines whether the UE moves to a third network area, where the third network area is a network that has established a PDN connection associated with the UE. region;

所述控制面CP根据用户设备UE所处的网络区域为所述UE选择PDN连接包括：The selecting, by the control plane, the PDN connection for the UE according to the network area where the user equipment UE is located includes:

若所述UE移动到所述第三网络区域，则所述CP根据所述第三网络区域为所述UE选择目标PDN连接，所述目标PDN连接为所述第三网络区域中已建立的PDN连接中的一个PDN连接。If the UE moves to the third network area, the CP selects a target PDN connection for the UE according to the third network area, and the target PDN connection is an established PDN in the third network area. A PDN connection in the connection.
根据权利要求5所述的方法，其特征在于，所述指示信息携带有所述目标PDN连接对应的接入点名称APN以及用于指示所述目标PDN连接为具有最高优先级的PDN连接的标识。The method according to claim 5, wherein the indication information carries an access point name APN corresponding to the target PDN connection and an identifier for indicating that the target PDN connection is the PDN connection with the highest priority. .
一种分组数据网PDN连接建立的方法，其特征在于，包括：A method for establishing a PDN connection of a packet data network, comprising:

用户设备UE接收控制面CP发送的指示信息，所述指示信息用于指示所述UE通过目标PDN连接进行业务传输，所述目标PDN连接为所述CP根据所述UE所处的网络区域为所述UE从可用的PDN连接中选择的一个PDN连接；The user equipment UE receives the indication information sent by the control plane CP, where the indication information is used to indicate that the UE performs the service transmission by using the target PDN connection, where the target PDN connection is the network area according to the UE Describe a PDN connection selected by the UE from available PDN connections;

若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，所述UE根据所述指示信息向所述CP发送用于建立所述目标PDN连接的请求，以使得所述CP根据接收到的请求建立所述目标PDN连接。If the target PDN connection is not established, when the UE is to perform the service transmission, the UE is according to the The indication information sends a request to the CP to establish the target PDN connection, such that the CP establishes the target PDN connection according to the received request.
根据权利要求7所述的方法，其特征在于，所述UE根据所述指示信息向所述CP发送用于建立所述目标PDN连接的请求之后包括：The method according to claim 7, wherein the sending, by the UE, the request for establishing the target PDN connection to the CP according to the indication information comprises:

所述UE接收所述CP返回的所述目标PDN连接的标识，并将所述目标PDN连接设置为具有最高优先级的PDN连接，所述目标PDN连接的标识为所述CP根据接收到的请求建立所述目标PDN连接后，为所述目标PDN连接分配的标识。Receiving, by the UE, an identifier of the target PDN connection returned by the CP, and setting the target PDN connection as a PDN connection with a highest priority, where the identifier of the target PDN connection is the CP according to the received request. After the target PDN connection is established, an identifier assigned to the target PDN connection is established.
根据权利要求7所述的方法，其特征在于，所述方法还包括：The method of claim 7, wherein the method further comprises:

若所述目标PDN连接已建立，则所述UE通过所述目标PDN连接进行业务传输。If the target PDN connection is established, the UE performs service transmission through the target PDN connection.
一种控制面CP，其特征在于，包括：A control surface CP, comprising:

选择模块，用于根据用户设备UE所处的网络区域为所述UE选择目标PDN连接，所述目标PDN连接为可用的PDN连接中的一个PDN连接；a selection module, configured to select a target PDN connection for the UE according to a network area where the user equipment UE is located, where the target PDN connection is one of the available PDN connections;

发送模块，用于向所述UE发送指示信息，所述指示信息用于指示所述UE通过所述目标PDN连接进行业务传输；a sending module, configured to send, to the UE, indication information, where the indication information is used to indicate that the UE performs a service transmission by using the target PDN connection;

接收模块，用于若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，接收所述UE根据所述指示信息发送的用于建立所述目标PDN连接的请求；a receiving module, configured to: if the target PDN connection is not established, when the UE performs the service transmission, receive a request that is sent by the UE according to the indication information, for establishing the target PDN connection;

建立模块，用于根据接收到的请求建立所述目标PDN。And establishing a module, configured to establish the target PDN according to the received request.
根据权利要求10所述的CP，其特征在于，所述CP还包括：The CP according to claim 10, wherein the CP further comprises:

第一判断模块，用于当所述UE从第一网络移动时，判断所述UE是否移动到第二网络区域，所述第二网络区域为未建立过与所述UE相关联的PDN连接的网络区域；a first determining module, configured to determine, when the UE moves from the first network, whether the UE moves to a second network area, where the second network area is a PDN connection that is not established with the UE Network area

所述选择模块，具体用于若所述UE移动到所述第二网络区域，则根据所述第二网络区域为所述UE选择目标PDN连接，所述目标PDN连接为未建立的PDN连接。The selecting module is specifically configured to: if the UE moves to the second network area, select a target PDN connection for the UE according to the second network area, where the target PDN connection is an unestablished PDN connection.
根据权利要求11所述的CP，其特征在于，所述指示信息携带有所述目标PDN连接对应的接入点名称APN以及用于指示所述UE能够建立所述目标PDN连接的信息。The CP according to claim 11, wherein the indication information carries an access point name APN corresponding to the target PDN connection and information for indicating that the UE can establish the target PDN connection.
根据权利要求10所述的CP，其特征在于，所述CP还包括：The CP according to claim 10, wherein the CP further comprises:

控制模块，用于若所述目标PDN连接已建立，则控制所述UE通过所述目标PDN连接进行业务传输。And a control module, configured to control, by the UE, that the target PDN connection is established, to perform service transmission by using the target PDN connection.
根据权利要求13所述的CP，其特征在于，所述CP还包括：The CP according to claim 13, wherein the CP further comprises:

第二判断模块，用于当所述UE从所述第一网络区域移动时，判断所述UE是否移动到第三网络区域，所述第三网络区域为已建立过与所述UE相关联的PDN连接的网络区域；a second determining module, configured to determine, when the UE moves from the first network area, whether the UE moves to a third network area, where the third network area is associated with the UE The network area to which the PDN is connected;

所述选择模块，具体用于若所述UE移动到所述第三网络区域，则根据所述第三网络区域为所述UE选择目标PDN连接，所述目标PDN连接为所述第三网络区域中已建立的PDN连接中的一个PDN连接。The selecting module is specifically configured to: if the UE moves to the third network area, select a target PDN connection for the UE according to the third network area, where the target PDN connection is the third network area One of the PDN connections in the established PDN connection.
根据权利要求14所述的CP，其特征在于，所述指示信息携带有所述目标PDN连接对应的接入点名称APN以及用于指示所述目标PDN连接为具有最高优先级的PDN连接的标识。The CP according to claim 14, wherein the indication information carries an access point name APN corresponding to the target PDN connection and an identifier for indicating that the target PDN connection is the PDN connection with the highest priority. .
一种用户设备UE，其特征在于，包括： A user equipment (UE), comprising:

第一接收模块，用于接收控制面CP发送的指示信息，所述指示信息用于指示所述UE通过目标PDN连接进行业务传输，所述目标PDN连接为所述CP根据所述UE所处的网络区域为所述UE从可用的PDN连接中选择的一个PDN连接；a first receiving module, configured to receive indication information sent by the control plane CP, where the indication information is used to indicate that the UE performs a service transmission by using a target PDN connection, where the target PDN connection is the CP according to the UE The network area is one PDN connection selected by the UE from available PDN connections;

发送模块，用于若所述目标PDN连接未建立，则当所述UE将进行所述业务传输时，根据所述指示信息向所述CP发送用于建立所述目标PDN连接的请求，以便所述CP根据接收到的请求建立所述目标PDN连接。a sending module, configured to send, when the UE performs the service transmission, a request for establishing the target PDN connection according to the indication information, if the target PDN connection is not established, so that The CP establishes the target PDN connection according to the received request.
根据权利要求16所述的UE，其特征在于，所述UE还包括：The UE according to claim 16, wherein the UE further comprises:

第二接收模块，用于接收所述CP返回的所述目标PDN连接的标识；a second receiving module, configured to receive an identifier of the target PDN connection returned by the CP;

处理模块，用于将所述目标PDN连接设置为具有最高优先级的PDN连接；a processing module, configured to set the target PDN connection to a PDN connection with the highest priority;

其中，所述目标PDN连接的标识为所述CP根据接收到的请求建立所述目标PDN连接后，为所述目标PDN连接分配的标识。The identifier of the target PDN connection is an identifier that is allocated to the target PDN connection after the CP establishes the target PDN connection according to the received request.
根据权利要求16所述的UE，其特征在于，所述UE还包括：The UE according to claim 16, wherein the UE further comprises:

传输模块，用于若所述目标PDN连接已建立，则通过所述目标PDN连接进行业务传输。 And a transmission module, configured to perform service transmission by using the target PDN connection if the target PDN connection is established.