CN110351777A - The method and apparatus for indicating service distributing - Google Patents

Abstract

The application provides a kind of method and relevant apparatus for indicating service distributing.This method comprises: anchor point conversation management functional network element receives first identifier from intermediate conversation management functional network element, which is used to identify the user plane functions network element of the first data network of access；The anchor point conversation management functional network element indicates that the intermediate session management function network element is inserted into the user plane functions network element according to the first identifier, which is used for the first service distributing to first data network.The method and relevant apparatus of instruction service distributing provided by the present application, when facilitating terminal not in the service range of anchor point conversation management functional network element, still accessible local data network.

Description

Translated fromChinese

指示业务分流的方法和装置Method and device for indicating traffic offload

技术领域technical field

本申请涉及通信领域，并且更具体地，涉及指示业务分流的方法和装置。The present application relates to the field of communications, and more particularly, to a method and apparatus for indicating traffic offload.

背景技术Background technique

现有的第五代(5rd generation，5G)网络架构中，一个分组数据单元(packetdata unit，PDU)会话由一个会话管理功能(session management function，SMF)网元管理。这意味着，在现有的5G网络架构中，当终端处于非漫游状态时，终端的PDU会话的用户面路径中的用户面功能(user plane function，UPF)网元均由一个SMF网元控制。比如，终端的PDU会话对应两个UPF网元，一个UPF网元位于靠近终端的接入设备的位置，而另外一个UPF网元位于中心机房，此时，管理该终端的PDU会话的SMF网元需要能控制这两个不同位置的UPF网元。In the existing fifth generation (5rd generation, 5G) network architecture, a packet data unit (packet data unit, PDU) session is managed by a session management function (session management function, SMF) network element. This means that in the existing 5G network architecture, when the terminal is in a non-roaming state, the user plane function (UPF) network elements in the user plane path of the terminal's PDU session are all controlled by one SMF network element . For example, the PDU session of the terminal corresponds to two UPF network elements, one UPF network element is located near the access device of the terminal, and the other UPF network element is located in the central computer room. At this time, the SMF network element that manages the PDU session of the terminal A UPF network element capable of controlling these two different locations is required.

然而，上述5G网络架构与运营商的实际部署并不一致。在运营商的实际部署中，考虑到跨行政区域配置的复杂性以及运营商希望隐藏网络拓扑的需求，通常SMF网元和UPF网元均是按行政区域进行划分的。换句话说，SMF网元也具有服务范围。其中，SMF网元只能管理该服务范围内的UPF网元，不能管理服务范围外的UPF网元。这种情况下，当终端不在锚点SMF网元的服务范围内时，如何使得终端仍然可以访问本地数据网络，是目前研究的热点。However, the above-mentioned 5G network architecture is not consistent with the actual deployment of operators. In an operator's actual deployment, considering the complexity of cross-administrative area configuration and the operator's desire to hide the network topology, usually SMF network elements and UPF network elements are divided according to administrative areas. In other words, SMF network elements also have a service scope. Among them, the SMF network element can only manage the UPF network elements within the service scope, and cannot manage the UPF network elements outside the service scope. In this case, when the terminal is not within the service range of the anchor SMF network element, how to enable the terminal to still access the local data network is a current research focus.

发明内容SUMMARY OF THE INVENTION

本申请提供一种指示业务分流的方法和相关装置，有助于终端不在锚点会话管理功能网元的服务范围内时，仍然可以访问本地数据网络。The present application provides a method and a related device for indicating service offload, which helps a terminal to still access a local data network when it is not within the service range of the anchor session management function network element.

第一方面，本申请提供了一种指示业务分流的方法。该方法包括：锚点会话管理功能网元从中间会话管理功能网元接收第一标识，该第一标识用于标识接入第一数据网络的用户面功能网元；该锚点会话管理功能网元根据该第一标识，指示该中间会话管理功能网元插入该第一标识所标识的用户面功能网元，该用户面功能网元用于将第一业务分流至该第一数据网络。In a first aspect, the present application provides a method for indicating service offload. The method includes: an anchor session management function network element receives a first identifier from an intermediate session management function network element, where the first identifier is used to identify a user plane function network element accessing the first data network; the anchor session management function network element The element instructs the intermediate session management function network element to insert the user plane function network element identified by the first identifier according to the first identifier, and the user plane function network element is used for offloading the first service to the first data network.

该方法中，由中间会话管理功能网元向锚点会话管理功能网元上报用于接入第一数据网络的用户面功能网元的第一标识，然后锚点会话管理功能网元根据该第一标识指示该中间会话管理功能网元插入用于将终端的第一业务分流至第一数据网络的用户面功能网元，从而在终端不再锚点会话管理功能网元的服务范围内时，有助于终端通过该插入的用户面功能网元访问本地数据网络。In this method, the intermediate session management function network element reports the first identifier of the user plane function network element used to access the first data network to the anchor session management function network element, and then the anchor session management function network element reports the first identifier of the user plane function network element for accessing the first data network, and then the anchor session management function network element reports the first identifier of the user plane function network element for accessing the first data network to the anchor session management function network element. An identifier instructing the intermediate session management function network element to be inserted into the user plane function network element for offloading the first service of the terminal to the first data network, so that when the terminal is no longer within the service range of the anchor session management function network element, It is helpful for the terminal to access the local data network through the inserted user plane function network element.

可选地，第一标识可以是数据网络接入网标识。Optionally, the first identifier may be a data network access network identifier.

结合第一方面，在第一种可能的实现方式中，锚点会话管理功能网元根据该第一标识，指示中间会话管理功能网元插入用于将第一业务分流至所述第一数据网络的用户面功能网元，包括：该锚点会话管理功能网元根据该第一标识以及控制规则，指示该中间会话管理功能网元插入用于将第一业务分流至第一数据网络的用户面功能网元。With reference to the first aspect, in a first possible implementation manner, the anchor session management function network element instructs the intermediate session management function network element to insert the first service for offloading the first service to the first data network according to the first identifier. The user plane function network element includes: the anchor session management function network element instructs the intermediate session management function network element to insert the user plane for offloading the first service to the first data network according to the first identifier and the control rule. functional network element.

可选地，锚点会话管理功能网元根据该第一标识以及控制规则，指示该中间会话管理功能网元插入用于将第一业务分流至第一数据网络的用户面功能网元，可以包括：锚点会话管理功能网元确定该控制规则中包括第一标识时，指示该中间会话管理功能网元插入用于将第一业务分流至第一数据网络的用户面功能网元。Optionally, the anchor session management function network element instructs the intermediate session management function network element to insert the user plane function network element for offloading the first service to the first data network according to the first identifier and the control rule, which may include: : When the anchor session management function network element determines that the control rule includes the first identifier, it instructs the intermediate session management function network element to insert the user plane function network element for offloading the first service to the first data network.

结合第一方面或第一种可能的实现方式中，在第二种可能的实现方式中，锚点会话管理功能网元根据第一标识，指示中间会话管理功能网元插入用于将第一业务分流至第一网络的用户面功能网元，包括：该锚点会话管理功能网元根据该第一标识，确定触发该第一业务的本地分流。In combination with the first aspect or the first possible implementation, in the second possible implementation, the anchor session management function network element instructs the intermediate session management function network element to insert the first service according to the first identifier. The offloading to the user plane function network element of the first network includes: the anchor session management function network element determines, according to the first identifier, to trigger the local offload of the first service.

也就是说，锚点会话管理功能网元在根据中间会话管理功能网元上报的第一标识先确定是否触发第一业务的本地分流，并在确定触发第一业务的本地分流的情况下，才指示中间会话管理功能网元插入用于将第一业务分流至第一数据网络的用户面功能网元。That is to say, the anchor session management function network element first determines whether to trigger the local offload of the first service according to the first identifier reported by the intermediate session management function network element, and only when it is determined to trigger the local offload of the first service. The intermediate session management function network element is instructed to be inserted into the user plane function network element for offloading the first service to the first data network.

结合第一方面或上述任意一种可能的实现方式，在第三种可能的实现方式中，锚点会话管理功能网元从中间会话管理功能网元接收第一标识之前，该方法还包括：该锚点会话管理功能网元向该中间会话管理功能网元发送订阅请求信息，该订阅请求信息用于订阅数据网络接入标识改变事件。With reference to the first aspect or any of the above possible implementation manners, in a third possible implementation manner, before the anchor session management function network element receives the first identifier from the intermediate session management function network element, the method further includes: the The anchor session management function network element sends subscription request information to the intermediate session management function network element, where the subscription request information is used to subscribe to a data network access identifier change event.

相应地，锚点会话管理功能网元从中间会话管理功能网元接收第一标识，包括：该锚点会话管理功能网元从该中间会话管理功能网元接收数据网络接入标识改变事件的事件通知信息，该事件通知信息携带该第一标识。Correspondingly, the anchor session management function network element receiving the first identifier from the intermediate session management function network element includes: the anchor session management function network element receives an event of a data network access identifier change event from the intermediate session management function network element notification information, where the event notification information carries the first identifier.

该实现方式中，该锚点会话管理功能网元向该中间会话管理功能网元发送订阅请求信息，使得该中间会话管理功能网元可以仅在数据网络接入标识发生改变时才向该锚点会话管理功能网元上报第一标识，从而有助于节省信令开销。In this implementation, the anchor session management function network element sends subscription request information to the intermediate session management function network element, so that the intermediate session management function network element can only send a subscription request to the anchor when the data network access identifier changes. The network element of the session management function reports the first identifier, thereby helping to save signaling overhead.

结合第一方面或上述任意一种可能的实现方式，在第四种可能的实现方式中，锚点会话管理功能网元从中间会话管理功能网元接收第一标识之前，该方法还包括：该锚点会话管理功能网元向该中间会话管理功能网元发送获取请求消息，该获取请求消息用于请求获取用于接入数据网络的用户面功能网元的标识。With reference to the first aspect or any of the above possible implementation manners, in a fourth possible implementation manner, before the anchor session management function network element receives the first identifier from the intermediate session management function network element, the method further includes: the The anchor session management function network element sends an acquisition request message to the intermediate session management function network element, where the acquisition request message is used to request to acquire the identifier of the user plane function network element for accessing the data network.

可选地，该获取请求消息可以用于请求获取该中间会话管理功能网元的服务范围内、用于接入数据网络的用户面功能网元的标识。Optionally, the acquisition request message may be used to request to acquire the identifier of the user plane function network element within the service scope of the intermediate session management function network element and used for accessing the data network.

结合第一方面或上述任意一种可能的实现方式，在第五种可能的实现方式中，锚点会话管理功能网元从中间会话管理功能网元接收第一标识之前，该方法还包括：该锚点会话管理功能网元向该中间会话管理功能网元发送至少一个数据网络接入标识，其中，该至少一个数据网络接入标识中包括该第一标识。With reference to the first aspect or any of the above possible implementation manners, in a fifth possible implementation manner, before the anchor session management function network element receives the first identifier from the intermediate session management function network element, the method further includes: the The anchor session management function network element sends at least one data network access identifier to the intermediate session management function network element, wherein the at least one data network access identifier includes the first identifier.

该实现方式中，该锚点会话管理功能网元向该中间会话管理功能网元发送至少一个数据网络接入标识，有助于中间会话管理功能网元根据该至少一个数据网络接入标识向锚点会话管理功能网元发送第一标识，从而有助于节省信令开销。In this implementation, the anchor session management function network element sends at least one data network access identifier to the intermediate session management function network element, which helps the intermediate session management function network element to send the anchor to the anchor according to the at least one data network access identifier. The point session management function network element sends the first identifier, thereby helping to save signaling overhead.

结合第五种可能的实现方式，在第六种可能的实现方式中，锚点会话管理功能网元向中间会话管理功能网元发送至少一个数据网络接入标识之前，该方法还包括：该锚点会话管理功能网元从该中间会话管理功能网元接收该获取请求消息的响应消息，该响应消息中包括数据网络接入标识列表，该数据网络接入标识列表中包括该第一标识；该锚点会话管理功能网元根据该数据网络接入标识列表和该控制规则，确定该至少一个数据网络接入标识。With reference to the fifth possible implementation manner, in the sixth possible implementation manner, before the anchor session management function network element sends at least one data network access identifier to the intermediate session management function network element, the method further includes: the anchor The point session management function network element receives a response message to the acquisition request message from the intermediate session management function network element, the response message includes a data network access identifier list, and the data network access identifier list includes the first identifier; the The anchor session management function network element determines the at least one data network access identifier according to the data network access identifier list and the control rule.

该实现方式中，锚点会话管理功能网元向中间会话管理功能网元发送的至少一个数据网络接入标识是根据中间会话管理功能网元上报的数据网络接入标识列表和控制规则得到的，有助于节省信令开销。In this implementation manner, the at least one data network access identifier sent by the anchor session management function network element to the intermediate session management function network element is obtained according to the data network access identifier list and control rules reported by the intermediate session management function network element, Helps to save signaling overhead.

结合第一方面或上述任意一种可能的实现方式，在第七种可能的实现方式中，该方法在该中间会话管理功能网元的插入过程中执行，或，在该中间会话管理功能网元插入过程完成后执行。In combination with the first aspect or any one of the above possible implementation manners, in a seventh possible implementation manner, the method is executed during the insertion process of the intermediate session management function network element, or, in the intermediate session management function network element Executed after the insertion process is complete.

结合第一方面或上述任意一种可能的实现方式，在第八种可能的实现方式中，用于接入该第一数据网络的用户面功能网元位于该中间会话管理功能网元的服务范围内。In combination with the first aspect or any one of the above possible implementation manners, in an eighth possible implementation manner, the user plane function network element used to access the first data network is located in the service range of the intermediate session management function network element Inside.

第二方面，本申请提供了一种指示业务分流的方法。该方法包括：中间会话管理功能网元向锚点会话管理功能网元发送第一标识，该第一标识用于标识接入第一数据网络的用户面功能网元；该中间会话管理功能网元在该锚点会话管理功能网元的指示下，插入第一标识所标识的用户面功能网元，该用户面功能网元用于将第一业务分流至该第一数据网络。In a second aspect, the present application provides a method for indicating service offload. The method includes: the intermediate session management function network element sends a first identifier to the anchor session management function network element, where the first identifier is used to identify the user plane function network element accessing the first data network; the intermediate session management function network element Under the instruction of the anchor session management function network element, the user plane function network element identified by the first identifier is inserted, and the user plane function network element is used for offloading the first service to the first data network.

该方法中，中间会话管理功能网元向锚点会话管理功能网元上报用于接入第一数据网络的用户面功能网元的第一标识，然后在锚点会话管理功能网元根据该第一标识指示下，该中间会话管理功能网元插入用于将终端的第一业务分流至第一数据网络的用户面功能网元，从而在终端不再锚点会话管理功能网元的服务范围内时，有助于终端通过该插入的用户面功能网元访问本地数据网络。In this method, the intermediate session management function network element reports the first identifier of the user plane function network element used to access the first data network to the anchor session management function network element, and then the anchor session management function network element reports the first identifier of the user plane function network element for accessing the first data network, and then the anchor session management function network element reports the first identifier of the user plane function network element for accessing the first data network to the anchor session management function network element. Under the instruction of an identifier, the intermediate session management function network element is inserted into the user plane function network element for offloading the first service of the terminal to the first data network, so that the terminal is no longer within the service range of the anchor session management function network element. , it is helpful for the terminal to access the local data network through the inserted user plane function network element.

可选地，第一标识可以是数据网络接入网标识。Optionally, the first identifier may be a data network access network identifier.

结合第二方面，在第一种可能的实现方式中，中间会话管理功能网元向锚点会话管理功能网元发送第一标识之前，该方法还包括：该中间会话管理功能网元从该锚点会话管理功能网元接收订阅请求信息，该订阅请求信息用于订阅数据网络接入标识改变事件。With reference to the second aspect, in a first possible implementation manner, before the intermediate session management function network element sends the first identifier to the anchor session management function network element, the method further includes: the intermediate session management function network element retrieves the data from the anchor The point session management function network element receives subscription request information, where the subscription request information is used to subscribe to a data network access identity change event.

相应地，中间会话管理功能网元向锚点会话管理功能网元发送第一标识，包括：该中间会话管理功能网元检测到数据网络接入标识改变事件时，向该锚点会话管理功能网元发送事件通知信息，该事件通知信息携带该第一标识。Correspondingly, the intermediate session management function network element sending the first identification to the anchor session management function network element includes: when the intermediate session management function network element detects a data network access identification change event, sending the first identifier to the anchor session management function network element. The element sends event notification information, where the event notification information carries the first identifier.

该实现方式中，中间会话管理功能网元可以仅在数据网络接入标识发生改变时才向该锚点会话管理功能网元上报第一标识，从而有助于节省信令开销In this implementation, the intermediate session management function network element can report the first identifier to the anchor session management function network element only when the data network access identifier changes, thereby helping to save signaling overhead

结合第二方面或第一种可能的实现方式，在第二种可能的实现方式中，中间会话管理功能网元向锚点会话管理功能网元发送第一标识之前，该方法还包括：该中间会话管理功能网元从该锚点会话管理功能网元接收获取请求消息，该获取请求消息用于请求获取用于接入数据网络的用户面功能网元的标识。With reference to the second aspect or the first possible implementation manner, in the second possible implementation manner, before the intermediate session management function network element sends the first identifier to the anchor session management function network element, the method further includes: the intermediate session management function network element The session management function network element receives an acquisition request message from the anchor session management function network element, where the acquisition request message is used to request to acquire the identifier of the user plane function network element for accessing the data network.

结合第二方面或上述任意一种可能的实现方式，在第三种可能的实现方式中，中间会话管理功能网元向锚点会话管理功能网元发送第一标识之前，该方法还包括：该中间会话管理功能网元从该锚点会话管理功能网元接收至少一个数据网络接入标识，该至少一个数据网络接入标识中包括该第一标识。In combination with the second aspect or any of the above possible implementation manners, in a third possible implementation manner, before the intermediate session management function network element sends the first identifier to the anchor session management function network element, the method further includes: the The intermediate session management function network element receives at least one data network access identifier from the anchor session management function network element, and the at least one data network access identifier includes the first identifier.

相应地，中间会话管理功能网元向锚点会话管理功能网元发送第一标识，包括：中间会话管理功能网元根据该至少一个数据网络接入标识，向该锚点会话管理功能网元发送该第一标识。Correspondingly, the intermediate session management function network element sending the first identifier to the anchor session management function network element includes: the intermediate session management function network element sends the anchor session management function network element to the anchor session management function network element according to the at least one data network access identifier. the first identification.

该实现方式，使得中间会话管理功能网元可以不发送该至少一个数据网络接入标识以外的数据网络接入标识，从而有助于节省信令开销。In this implementation manner, the intermediate session management function network element may not send data network access identifiers other than the at least one data network access identifier, thereby helping to save signaling overhead.

结合第三种可能的实现方式，在第四种可能的实现方式中，中间会话管理功能网元向锚点会话管理功能网元发送第一标识之前，该方法还包括：该中间会话管理功能网元向锚点会话管理功能网元发送获取请求消息的响应消息，该响应消息中包括数据网络接入标识列表，该数据网络接入标识列表中包括该第一标识。With reference to the third possible implementation manner, in the fourth possible implementation manner, before the intermediate session management function network element sends the first identifier to the anchor session management function network element, the method further includes: the intermediate session management function network element The element sends a response message of the acquisition request message to the anchor session management function network element, where the response message includes a data network access identifier list, and the data network access identifier list includes the first identifier.

该实现方式可以使得锚点会话管理功能网元可以根据该数据网络接入标识列表确定该至少一个数据网络接入标识，从而有助于节省信令开销。This implementation allows the anchor session management function network element to determine the at least one data network access identifier according to the data network access identifier list, thereby helping to save signaling overhead.

结合第二方面或上述任意一种可能的实现方式，在第五种可能的实现方式中，该方法在该中间会话管理功能网元的插入过程中执行，或，在该中间会话管理功能网元插入过程完成后执行。In combination with the second aspect or any one of the above possible implementation manners, in a fifth possible implementation manner, the method is executed during the insertion process of the intermediate session management function network element, or, in the intermediate session management function network element Executed after the insertion process is complete.

结合第二方面或上述任意一种可能的实现方式，在第六种可能的实现方式中，用于接入该第一数据网络的用户面网元的位于该中间会话管理功能网元的服务范围内。In combination with the second aspect or any one of the above possible implementation manners, in a sixth possible implementation manner, the user plane network element used to access the first data network is located in the service range of the intermediate session management function network element Inside.

第三方面，本申请提供了一种指示业务分流的装置。该装置包括用于执行第一方面或第一方面中任意一种可能的实现方式中的方法的模块。该装置包括的模块可以通过软件和/或硬件方式实现。In a third aspect, the present application provides an apparatus for indicating service offload. The apparatus includes means for performing the method of the first aspect or any one of the possible implementations of the first aspect. The modules included in the apparatus may be implemented by software and/or hardware.

第四方面，本申请提供了一种指示业务分流的装置。该装置包括用于执行第二方面或第二方面中任意一种可能的实现方式中的方法的模块。该装置包括的模块可以通过软件和/或硬件方式实现。In a fourth aspect, the present application provides an apparatus for indicating service offload. The apparatus includes means for performing the method of the second aspect or any one of the possible implementations of the second aspect. The modules included in the apparatus may be implemented by software and/or hardware.

第五方面，本申请提供了一种锚点会话管理功能网元。该锚点会话管理功能网元包括处理器和收发器。处理器用于执行程序。当处理器执行代码时，处理器和收发器实现第一方面或第一方面中任意一种可能的实现方式中的方法。In a fifth aspect, the present application provides an anchor session management function network element. The anchor session management function network element includes a processor and a transceiver. A processor is used to execute programs. When the processor executes the code, the processor and the transceiver implement the method of the first aspect or any of the possible implementations of the first aspect.

可选地，该锚点会话管理功能网元还可以包括存储器。存储器用于存储程序和数据。Optionally, the anchor session management function network element may further include a memory. Memory is used to store programs and data.

第六方面，本申请提供了一种中间会话管理功能网元。该中间会话管理功能网元包括处理器和收发器。处理器用于执行程序。当处理器执行代码时，处理器和收发器实现第二方面或第二方面中任意一种可能的实现方式中的方法。In a sixth aspect, the present application provides an intermediate session management function network element. The intermediate session management function network element includes a processor and a transceiver. A processor is used to execute programs. When the processor executes the code, the processor and the transceiver implement the method of the second aspect or any of the possible implementations of the second aspect.

可选地，该中间会话管理功能网元还可以包括存储器。存储器用于存储程序和数据。Optionally, the intermediate session management function network element may further include a memory. Memory is used to store programs and data.

第七方面，本申请提供了一种计算机可读存储介质。该计算机可读存储介质中存储用于通信装置执行的程序代码。该程序代码包括用于执行第一方面或第二方面中的方法的指令。In a seventh aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores program code for execution by the communication apparatus. The program code includes instructions for performing the method of the first aspect or the second aspect.

第八方面，本申请提供了一种计算机可读存储介质。该计算机可读存储介质中存储用于锚点会话管理功能网元或中阿会话管理功能网元执行的程序代码。该程序代码包括用于执行第一方面或第二方面中的方法的指令。In an eighth aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores program codes for execution by the anchor session management function network element or the China-Arab session management function network element. The program code includes instructions for performing the method of the first aspect or the second aspect.

第九方面，本申请提供了一种包含指令的计算机程序产品。当该计算机程序产品在通信装置、锚点会话管理功能网元或中间会话管理功能网元上运行时，使得通信装置、锚点会话管理功能网元或中间会话管理功能网元执行第一方面或第二方面中的方法。In a ninth aspect, the application provides a computer program product comprising instructions. When the computer program product runs on the communication device, the anchor session management function network element or the intermediate session management function network element, causes the communication device, the anchor session management function network element or the intermediate session management function network element to perform the first aspect or The method of the second aspect.

第十方面，本申请提供了一种系统芯片，该系统芯片包括输入输出接口、至少一个处理器、至少一个存储器和总线，该至少一个存储器用于存储指令，该至少一个处理器用于调用该至少一个存储器的指令，以进行第一方面或第二方面中的方法的操作。In a tenth aspect, the present application provides a system chip, the system chip includes an input and output interface, at least one processor, at least one memory, and a bus, the at least one memory is used for storing instructions, and the at least one processor is used for calling the at least one Instructions for a memory to perform operations of the method of the first aspect or the second aspect.

第十一方面，本申请提供了一种通信系统，该通信系统包括第五方面中的锚点会话管理功能网元和/或第六方面中的中间会话管理功能网元。In an eleventh aspect, the present application provides a communication system including the anchor session management function network element in the fifth aspect and/or the intermediate session management function network element in the sixth aspect.

附图说明Description of drawings

图1是本申请实施例的指示业务分流的方法的应用场景的示意图；1 is a schematic diagram of an application scenario of a method for indicating service offload according to an embodiment of the present application;

图2是本申请实施例的指示业务分流的方法的应用场景的示意图；2 is a schematic diagram of an application scenario of the method for indicating service offload according to an embodiment of the present application;

图3是本申请实施例的指示业务分流的方法的应用场景的示意图；3 is a schematic diagram of an application scenario of the method for indicating service offload according to an embodiment of the present application;

图4是本申请一个实施例的指示业务分流的方法的示意性流程图；FIG. 4 is a schematic flowchart of a method for indicating service offload according to an embodiment of the present application;

图5是本申请另一个实施例的指示业务分流的方法的示意性流程图；5 is a schematic flowchart of a method for indicating service offload according to another embodiment of the present application;

图6是本申请另一个实施例的指示业务分流的方法的示意性流程图；6 is a schematic flowchart of a method for indicating service offload according to another embodiment of the present application;

图7是本申请另一个实施例的指示业务分流的方法的示意性流程图；FIG. 7 is a schematic flowchart of a method for indicating service offload according to another embodiment of the present application;

图8是本申请另一个实施例的指示业务分流的方法的示意性流程图；8 is a schematic flowchart of a method for indicating service offload according to another embodiment of the present application;

图9是本申请另一个实施例的指示业务分流的方法的示意性流程图。FIG. 9 is a schematic flowchart of a method for indicating service offload according to another embodiment of the present application.

图10是本申请一个实施例的指示业务分流的装置的示意性结构图。FIG. 10 is a schematic structural diagram of an apparatus for indicating service offload according to an embodiment of the present application.

具体实施方式Detailed ways

下面将结合附图，对本申请中的技术方案进行描述。The technical solutions in the present application will be described below with reference to the accompanying drawings.

如图1所示，可以应用本申请实施例的指示业务分流的方法的应用场景中可以包括用户设备(user equipment，UE)101、接入网(access network，AN)设备102、用户面功能(user plane function，UPF)网元103、接入和移动性管理功能(access and mobilitymanagement function，AMF)网元104、会话管理功能(session management function，SMF)网元105、策略控制功能(policy control function，PCF)网元106和数据网络(datanetwork，DN)107。As shown in FIG. 1 , an application scenario to which the method for indicating service offload according to the embodiment of the present application can be applied may include a user equipment (UE) 101, an access network (AN) device 102, a user plane function ( user plane function, UPF) network element 103, access and mobility management function (AMF) network element 104, session management function (session management function, SMF) network element 105, policy control function (policy control function) , PCF) network element 106 and data network (data network, DN) 107.

UE也可以称为终端设备。终端设备可以经AN设备与一个或多个核心网(corenetwork，CN)进行通信。终端设备可称为接入终端、终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、无线网络设备、用户代理或用户装置。终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless localloop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它设备、车载设备、可穿戴设备或物联网、车辆网中的终端设备以及未来网络中的任意形态的终端设备等。The UE may also be referred to as a terminal device. Terminal devices may communicate with one or more core networks (CNs) via AN devices. A terminal device may be referred to as an access terminal, terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless network device, user agent, or user equipment. The terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld wireless communication capable Devices, computing devices or other devices connected to wireless modems, in-vehicle devices, wearable devices or the Internet of Things, end devices in vehicle networks, and any form of end device in future networks, etc.

AN设备可以是无线接入网(radio access network，RAN)设备。RAN设备的一种示例是基站(base station，BS)。The AN device may be a radio access network (RAN) device. An example of a RAN device is a base station (BS).

基站，也可称为基站设备，是一种将终端接入到无线网络的设备，包括但不限于：传输接收点(transmission reception point，TRP)、5G节点B(gNB)、演进型节点B(evolvednode B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如，home evolved nodeB，或home node B，HNB)、基带单元(base bandunit，BBU)，或Wifi接入点(access point，AP)，或小基站设备(pico)等。A base station, also known as a base station device, is a device that accesses a terminal to a wireless network, including but not limited to: transmission reception point (TRP), 5G Node B (gNB), Evolved Node B ( evolved node B (eNB), radio network controller (RNC), node B (node B, NB), base station controller (BSC), base transceiver station (BTS), family A base station (for example, home evolved node B, or home node B, HNB), base band unit (base band unit, BBU), or Wifi access point (access point, AP), or small cell equipment (pico), and the like.

应理解，本文对基站的具体类型不作限定。采用不同无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同。为方便描述，本申请所有实施例中，上述为终端提供无线通信功能的装置统称为基站。It should be understood that the specific type of the base station is not limited herein. In systems using different wireless access technologies, the names of devices with base station functions may be different. For the convenience of description, in all the embodiments of the present application, the above-mentioned apparatus for providing a wireless communication function for a terminal is collectively referred to as a base station.

UPF网元具有终端设备的报文转发、封装和统计等功能。UPF network elements have functions such as packet forwarding, encapsulation, and statistics on terminal devices.

AMF网元负责终端设备的接入和移动性管理。例如，负责UE位置更新、UE注册网络或UE切换等。The AMF network element is responsible for the access and mobility management of terminal equipment. For example, it is responsible for UE location update, UE registration network or UE handover, etc.

SMF网元负责UPF网元的选择、重选，互联网协议(internet protocol，IP)地址的分配等，还可以负责会话的建立、修改和释放等。The SMF network element is responsible for the selection and reselection of the UPF network element, the allocation of Internet Protocol (Internet Protocol, IP) addresses, and the like, and may also be responsible for the establishment, modification, and release of sessions, and the like.

PCF网元用于实现包括管理网络行为的统一策略框架、为控制面提供需要执行的策略规则以及获取与策略决策相关的订阅信息等功能。PCF network elements are used to implement functions including a unified policy framework for managing network behavior, providing policy rules that need to be executed for the control plane, and acquiring subscription information related to policy decisions.

DN是指为UE提供数据传输服务的运营商网络。例如，DNS可以是提供IP多媒体业务(IP multi-media，IMS)、互联网业务等业务的网络。DN refers to an operator network that provides data transmission services for UEs. For example, the DNS may be a network that provides services such as IP multimedia services (IP multi-media, IMS), Internet services, and the like.

应理解，本申请实施例并不限于图1所示的系统架构中。例如，可以应用本申请实施例的通信方法的通信系统中可以包括更多或更少的网元或设备。图1中的设备或网元可以是硬件，也可以是从功能上划分的软件或者以上二者的结合。图1中的设备或网元之间可以通过其他设备或网元通信。It should be understood that the embodiments of the present application are not limited to the system architecture shown in FIG. 1 . For example, a communication system to which the communication method of this embodiment of the present application can be applied may include more or less network elements or devices. The device or network element in FIG. 1 may be hardware, software divided by functions, or a combination of the above two. The devices or network elements in FIG. 1 may communicate with each other through other devices or network elements.

图1所示的应用场景中，UE 101至AN设备102，至UPF网元103至DN 107之间可以建立PDU会话，这样，UE 101可以通过该PDU会话来访问DN 107。该PDU会话由SMF网元105管理。DN 107可以称为中心DN。In the application scenario shown in FIG. 1 , a PDU session can be established between the UE 101 and the AN device 102 , and the UPF network element 103 and the DN 107 , so that the UE 101 can access the DN 107 through the PDU session. The PDU session is managed by the SMF network element 105 . DN 107 may be referred to as the central DN.

如图2所示，SMF网元105的服务范围为区域1。当UE 101位于区域1之外的区域2时，例如，UE 101从区域1中移动到区域2中时，SMF网元105会为UE 101插入SMF网元108以及插入UPF网元109，以便于SMF网元108和UPF网元109为UE 101服务。As shown in FIG. 2 , the service range of the SMF network element 105 is area 1 . When UE 101 is located in area 2 outside of area 1, for example, when UE 101 moves from area 1 to area 2, SMF network element 105 inserts SMF network element 108 and UPF network element 109 for UE 101 to facilitate SMF The network element 108 and the UPF network element 109 serve the UE 101 .

其中，SMF网元108的服务范围为区域2，UPF网元109位于SMF网元108的服务范围内。应理解，SMF网元108的服务范围内还可以部署有其他UPF网元。The service range of the SMF network element 108 is area 2, and the UPF network element 109 is located within the service range of the SMF network element 108. It should be understood that other UPF network elements may also be deployed within the service range of the SMF network element 108 .

SMF网元105可以称为锚点SMF(anchor-SMF，A-SMF)网元，SMF网元108可以称为中间SMF(intermediate-SMF，I-SMF)网元。The SMF network element 105 may be referred to as an anchor SMF (anchor-SMF, A-SMF) network element, and the SMF network element 108 may be referred to as an intermediate SMF (intermediate-SMF, I-SMF) network element.

I-SMF网元108的服务范围内部署有DN 110。DN 110可以称为本地DN。The DN 110 is deployed within the service range of the I-SMF network element 108 . DN 110 may be referred to as a local DN.

SMF网元105为UE 101插入SMF网元108后的应用场景的另一种示意图如图3所示。图3所示的应用场景与图2所示的应用场景的不同之处在于，在图2所示的应用场景中，A-SMF网元105与AMF网元104之间通过I-SMF网元108通信，在图3所示的应用场景中，A-SMF网元105与AMF网元104之间可以直接通信。Another schematic diagram of an application scenario after the SMF network element 105 is inserted into the SMF network element 108 for the UE 101 is shown in FIG. 3 . The difference between the application scenario shown in FIG. 3 and the application scenario shown in FIG. 2 is that in the application scenario shown in FIG. 2 , the A-SMF network element 105 and the AMF network element 104 pass through the I-SMF network element. 108 communication. In the application scenario shown in FIG. 3 , the A-SMF network element 105 and the AMF network element 104 can communicate directly.

在如图2或图3所示的应用场景中，当UE 101不在SMF网元105的服务范围内而位于SMF网元108的服务范围内时，UE 101的业务若可以由SMF网元108服务范围内的本地DN 110提供服务，则可以节省UE 101访问DN的时延。因此，UE 101不在SMF网元105的服务范围内而位于SMF网元108的服务范围内时，UE 110可以访问本地DN 110，以节省访问时延。In the application scenario shown in FIG. 2 or FIG. 3 , when the UE 101 is not within the service range of the SMF network element 105 but is within the service range of the SMF network element 108 , if the service of the UE 101 can be served by the SMF network element 108 If the local DN 110 within the range provides services, the time delay for the UE 101 to access the DN can be saved. Therefore, when the UE 101 is not within the service range of the SMF network element 105 but is within the service range of the SMF network element 108, the UE 110 can access the local DN 110 to save access delay.

针对如何实现UE 101访问本地DN 110的技术问题。本申请实施例基于此问题提出了指示业务分流的方法，以使得UE 101位于A-SMF网元105的服务范围之外时，UE 101可以访问本地DN 110。For the technical problem of how to realize the UE 101 accessing the local DN 110 . Based on this problem, the embodiment of the present application proposes a method for indicating service offload, so that when the UE 101 is located outside the service range of the A-SMF network element 105, the UE 101 can access the local DN 110.

本申请一个实施例的指示业务分流的方法的示意性流程图如图4所示。图4所示的方法中可以包括S401和S402。FIG. 4 is a schematic flowchart of a method for indicating service offload according to an embodiment of the present application. S401 and S402 may be included in the method shown in FIG. 4 .

应理解，图4示出了该方法的步骤或操作，但这些步骤或操作仅是示例，本申请实施例还可以执行其他操作或者图4中的各个操作的变形。此外，图4中的各个步骤可以按照与图4呈现的不同的顺序来执行，并且有可能并非要执行图4中的全部操作。It should be understood that FIG. 4 shows steps or operations of the method, but these steps or operations are only examples, and the embodiments of the present application may also perform other operations or variations of the respective operations in FIG. 4 . Furthermore, the various steps in FIG. 4 may be performed in a different order than presented in FIG. 4, and it is possible that not all operations in FIG. 4 are performed.

S401，I-SMF网元向A-SMF网元发送第一标识，该第一标识用于标识接入第一DN的UPF网元。相应地，A-SMF网元从I-SMF网元接收该第一标识。S401, the I-SMF network element sends a first identifier to the A-SMF network element, where the first identifier is used to identify the UPF network element accessing the first DN. Correspondingly, the A-SMF network element receives the first identification from the I-SMF network element.

其中，该I-SMF网元可以是为当前位置的UE提供会话管理服务的SMF网元。该第一DN可以是位于该I-SMF网元的服务范围内的DN。The I-SMF network element may be an SMF network element that provides session management services for the UE at the current location. The first DN may be a DN located within the service range of the I-SMF network element.

该第一标识所标识的UPF网元位于该I-SMF网元的服务范围内。或者可以说，用于接入第一DN的UPF网元位于该I-SMF网元的服务范围内。或者可以说，用于接入第一DN的UPF网元由该I-SMF网元管理。The UPF network element identified by the first identifier is located within the service range of the I-SMF network element. In other words, the UPF network element for accessing the first DN is located within the service range of the I-SMF network element. In other words, the UPF network element used to access the first DN is managed by the I-SMF network element.

例如，该I-SMF网元可以是I-SMF网元108，该A-SMF网元可以是SMF网元105。第一标识所标识的UPF网元为UPF网元109。该第一DN可以是本地DN 110。For example, the I-SMF network element may be the I-SMF network element 108 , and the A-SMF network element may be the SMF network element 105 . The UPF network element identified by the first identifier is the UPF network element 109 . The first DN may be the local DN 110 .

第一标识可以是数据网络接入标识(DN access identifier，DNAI)。The first identifier may be a data network access identifier (DN access identifier, DNAI).

S402，A-SMF网元根据该第一标识，指示I-SMF网元插入第一标识所标识的UPF网元，该UPF网元用于将第一业务分流至该第一DN。S402, the A-SMF network element instructs the I-SMF network element to insert the UPF network element identified by the first identifier according to the first identifier, where the UPF network element is configured to offload the first service to the first DN.

相应地，I-SMF网元在该A-SMF网元的指示下，插入用于将第一业务分流至该第一DN的UPF网元。Correspondingly, under the instruction of the A-SMF network element, the I-SMF network element inserts the UPF network element for offloading the first service to the first DN.

其中，“插入UPF网元”是指：在第一业务的传输路径中插入该UPF网元，且插入该UPF网元后，该UPF的作用是分流点，即，用于将第一业务分流至第一数据网络。Wherein, "inserting a UPF network element" means: inserting the UPF network element into the transmission path of the first service, and after the UPF network element is inserted, the UPF functions as a distribution point, that is, used to distribute the first service. to the first data network.

其中，该第一业务为UE所进行的业务，该第一DN可以提供该第一业务对应的服务。该UPF网元可以包括上行分类(uplink classifier，ULCL)网元和分支点(branch point，BP)中至少一种。The first service is a service performed by the UE, and the first DN can provide a service corresponding to the first service. The UPF network element may include at least one of an uplink classifier (ULCL) network element and a branch point (branch point, BP).

I-SMF网元在该A-SMF网元的指示下，插入用于将第一业务分流至该第一DN的UPF网元，可以包括：I-SMF网元在该A-SMF网元的指示下，选择UPF网元，建立I-SMF与该UPF网元之间的N4会话连接，向UPF网元发送报文转发规则。该UPF网元也可以称为中间UPF网元。Under the instruction of the A-SMF network element, the I-SMF network element inserts the UPF network element for offloading the first service to the first DN, which may include: the I-SMF network element is in the A-SMF network element Under the instruction, select the UPF network element, establish an N4 session connection between the I-SMF and the UPF network element, and send the packet forwarding rules to the UPF network element. The UPF network element may also be referred to as an intermediate UPF network element.

例如，在图2或图3所示的场景中应用图4所示的方法后，SMF网元108可以选择UPF网元109，建立SMF网元108与UPF网元109之间的N4会话连接，并向UPF网元109发送报文转发规则，由UPF网元109将UE的第一业务对应的报文转发至本地DN 110。For example, after applying the method shown in FIG. 4 in the scenario shown in FIG. 2 or FIG. 3, the SMF network element 108 can select the UPF network element 109 to establish an N4 session connection between the SMF network element 108 and the UPF network element 109, The packet forwarding rule is sent to the UPF network element 109, and the UPF network element 109 forwards the packet corresponding to the first service of the UE to the local DN 110.

当然，SMF网元108也可以选择位于SMF网元108服务范围内或者选择SMF网元108管理的其他UPF网元来作为中间UPF网元。本申请实施例对此并不限制。Of course, the SMF network element 108 may also select other UPF network elements located within the service range of the SMF network element 108 or select other UPF network elements managed by the SMF network element 108 as the intermediate UPF network element. This embodiment of the present application does not limit this.

该报文转发规则可以包括A-SMF服务范围内的UPF网元的用户面隧道信息、AN用户面隧道信息等。该报文转发规则还可以包括分流信息，该分流信息可以包括业务信息。其中，业务信息可以包括报文头特征信息，如源IP信息、目的IP信息、IP五元组等信息。The packet forwarding rule may include user plane tunnel information and AN user plane tunnel information of the UPF network element within the service range of the A-SMF. The packet forwarding rule may further include distribution information, and the distribution information may include service information. The service information may include packet header feature information, such as source IP information, destination IP information, IP quintuple and other information.

SMF网元108向UPF网元109下发的分流信息与SMF网元108从SMF网元105接收的分流策略可以相同，或者，SMF网元108向UPF网元109下发的分流信息可以是SMF网元108根据SMF网元108从SMF网元105接收的分流策略确定的。The offloading information delivered by the SMF network element 108 to the UPF network element 109 may be the same as the offloading policy received by the SMF network element 108 from the SMF network element 105, or the offloading information delivered by the SMF network element 108 to the UPF network element 109 may be SMF It is determined by the network element 108 according to the offload policy received by the SMF network element 108 from the SMF network element 105 .

分流策略与分流信息二者相同的一种示例为：分流信息和分流策略包括“源IP为IP1”。SMF网元108根据分流策略确定分流信息的一种示例为：分流策略包括“目的应用程序(application，APP)的标识为APP1”，SMF网元根据APP1和APP1与IP2之间的对应关系确定IP2，则分流信息可以包括“目的IP为IP2”。An example in which the offloading policy and the offloading information are the same is that the offloading information and the offloading policy include "the source IP is IP1". An example of the SMF network element 108 determining the offloading information according to the offloading policy is: the offloading policy includes “the identifier of the destination application (application, APP) is APP1”, and the SMF network element determines IP2 according to APP1 and the corresponding relationship between APP1 and IP2 , the distribution information may include "destination IP is IP2".

可选的，I-SMF网元可以选择本地锚点UPF网元作为分流的UPF网元，本地锚点UPF网元用于接入第一DN，本地锚点UPF网元可以与该中间UPF网元合设或分开部署。Optionally, the I-SMF network element can select the local anchor UPF network element as the offloaded UPF network element, the local anchor UPF network element is used to access the first DN, and the local anchor UPF network element can communicate with the intermediate UPF network element. Elements are co-located or deployed separately.

在本地锚点UPF网元和中间UPF网元分开部署的场景下，I-SMF网元可以向本地锚点发送该中间UPF网元的用户面隧道信息，从而建立AN至该中UPF网元，再至本地锚点UPF网元的用户面连接。In the scenario where the local anchor UPF network element and the intermediate UPF network element are deployed separately, the I-SMF network element can send the user plane tunnel information of the intermediate UPF network element to the local anchor point, thereby establishing an AN to the intermediate UPF network element, Then connect to the user plane of the local anchor UPF network element.

另外，I-SMF网元可以通过A-SMF网元向A-SMF服务范围内的UPF网元发送该中间UPF网元的用户面隧道信息，从而建立AN至该中间UPF网元，再至A-SMF服务范围内的UPF网元之间的用户面连接。In addition, the I-SMF network element can send the user plane tunnel information of the intermediate UPF network element to the UPF network element within the service range of the A-SMF through the A-SMF network element, thereby establishing an AN to the intermediate UPF network element, and then to the A-SMF network element. - User plane connections between UPF network elements within the SMF service range.

当该中间UPF网元收到来自AN的上行报文时，可以根据上行报文的头特征以及报文转发规则，判断将该上行报文发送至本地锚点UPF网元，还是发送至A-SMF网元服务范围内的UPF网元。When the intermediate UPF network element receives the uplink packet from the AN, it can determine whether to send the uplink packet to the local anchor UPF network element or to the A- UPF network elements within the service range of SMF network elements.

例如，当上行报文的目的IP为IP1时，该UPF网元将上行报文发送至本地锚点UPF网元。For example, when the destination IP of the uplink packet is IP1, the UPF network element sends the uplink packet to the local anchor UPF network element.

图4所示的方法中，可选地，A-SMF网元根据该第一标识，指示I-SMF网元插入用于将第一业务分流至该第一DN的UPF网元，可以包括：A-SMF网元根据该第一标识，确定触发该第一业务的本地分流。In the method shown in FIG. 4, optionally, according to the first identifier, the A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN, which may include: The A-SMF network element determines, according to the first identifier, to trigger the local offload of the first service.

也就是说，A-SMF网元可以在根据该第一标识确定触发第一业务的本地分流时，才指示I-SMF网元插入用于将第一业务分流至该第一DN的UPF网元。That is, the A-SMF network element may instruct the I-SMF network element to insert the UPF network element for offloading the first service to the first DN only when it is determined according to the first identifier to trigger the local offload of the first service .

图4所示的方法中，可选地，A-SMF网元根据该第一标识，指示I-SMF网元插入用于将第一业务分流至该第一DN的UPF网元，可以通过以下方式实现：A-SMF网元根据该第一标识以及控制规则，指示该I-SMF网元插入用于将第一业务分流至该第一DN的UPF网元。In the method shown in FIG. 4 , optionally, the A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN according to the first identifier. The method is implemented: the A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN according to the first identifier and the control rule.

可选地，该控制规则可以是策略和计费控制规则(policy and charging controlrule，PCC rules)。该控制规则可以包含业务信息，以及业务对应的位置信息。其中，业务信息可以由数据网络名称(data network name，DNN)、单网络切片选择辅助信息(singlenetwork Slice selection assistance information，S-NSSAI)、应用标识(applicationidentifier)、IP五元组等表示；业务对应的位置信息可以由一组DNAI表示。Optionally, the control rules may be policy and charging control rules (policy and charging control rules, PCC rules). The control rule may include service information and location information corresponding to the service. The service information may be represented by a data network name (DNN), a single network slice selection assistance information (S-NSSAI), an application identifier (applicationidentifier), an IP quintuple, etc.; The location information of can be represented by a set of DNAI.

可选地，该控制规则可以是A-SMF网元从PCF网元获取的。例如，该控制规则可以是A-SMF网元105从PCF网元106获取的。Optionally, the control rule may be acquired by the A-SMF network element from the PCF network element. For example, the control rule may be acquired by the A-SMF network element 105 from the PCF network element 106 .

可选地，A-SMF网元根据该第一标识以及控制规则，指示该I-SMF网元插入用于将第一业务分流至该第一DN的UPF网元，可以通过以下方式实现：A-SMF网元确定控制规则中包括第一标识时，指示该I-SMF网元插入用于将第一业务分流至该第一DN的UPF网元。Optionally, the A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN according to the first identifier and the control rule, which may be implemented in the following manner: A - When the SMF network element determines that the control rule includes the first identifier, instructing the I-SMF network element to insert the UPF network element for offloading the first service to the first DN.

或者，A-SMF网元根据该第一标识以及控制规则，指示该I-SMF网元插入用于将第一业务分流至该第一DN的UPF网元，可以通过以下方式实现：A-SMF网元确定该控制规则中包括该第一标识时，确定触发第一业务的本地分流，并指示该I-SMF网元插入用于将第一业务分流至该第一DN的UPF网元。Alternatively, the A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN according to the first identifier and the control rule, which may be implemented in the following manner: A-SMF When the network element determines that the control rule includes the first identifier, it determines to trigger the local offload of the first service, and instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN.

或者，A-SMF网元根据该第一标识，控制规则，以及业务信息，指示I-SMF网元插入用于将第一业务分流至第一DN的UPF网元。例如，当第一标识以及UPF网元103上报的业务信息满足控制规则时，A-SMF网元指示I-SMF网元插入用于将第一业务，分流至第一DN的UPF网元。其中，业务信息可以由图2或图3中的UPF网元103进行业务检测得到，并将检测到的业务信息上报给A-SMF网元。Or, the A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN according to the first identifier, the control rule, and the service information. For example, when the first identifier and the service information reported by the UPF network element 103 satisfy the control rule, the A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN. The service information may be obtained by the UPF network element 103 in FIG. 2 or FIG. 3 by performing service detection, and reporting the detected service information to the A-SMF network element.

例如，若UPF网元103检测到的业务信息包括“目的IP为IP1”，第一标识为DNAI1，控制规则中包括“IP1对应的DNAI为{DNAI1，DNAI2}”，那么，A-SMF网元可以确定第一标识以及UPF网元103检测到的业务信息均满足控制规则。For example, if the service information detected by the UPF network element 103 includes "destination IP is IP1", the first identifier is DNAI1, and the control rule includes "the DNAI corresponding to IP1 is {DNAI1, DNAI2}", then the A-SMF network element It can be determined that both the first identifier and the service information detected by the UPF network element 103 satisfy the control rule.

可选地，A-SMF网元根据该第一标识以及控制规则，指示该I-SMF网元插入用于将第一业务分流至该第一DN的UPF网元，可以包括：该A-SMF网元根据该第一标识以及该控制规则确定触发第一业务的分流时，向I-SMF网元发送该第一业务的业务信息和该第一标识。其中第一业务的业务信息和第一标识可以称为分流策略。Optionally, the A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN according to the first identifier and the control rule, which may include: the A-SMF network element When the network element determines to trigger offloading of the first service according to the first identifier and the control rule, it sends the service information of the first service and the first identifier to the I-SMF network element. The service information and the first identifier of the first service may be referred to as an offload policy.

此时，I-SMF网元在该A-SMF网元的指示下，插入用于将第一业务分流至该第一DN的UPF网元，可以包括：该I-SMF网元根据该分流策略，插入用于将第一业务分流至该第一DN的UPF网元，以便于该UPF网元可以将第一业务分流至第一DN。At this time, the I-SMF network element inserting the UPF network element for offloading the first service to the first DN under the instruction of the A-SMF network element may include: the I-SMF network element according to the offloading policy , and insert the UPF network element for offloading the first service to the first DN, so that the UPF network element can offload the first service to the first DN.

例如，A-SMF网元向I-SMF发送分流策略，分流策略包括第一业务的业务信息和第一标识；I-SMF网元根据第一标识选择UPF网元，该UPF网元具有分流功能；I-SMF网元向UPF网元下发报文转发规则，以使UPF网元将第一业务分流至第一DN。其中，报文转发规则包括分流信息，分流信息为I-SMF网元根据分流策略确定的，或者，I-SMF网元可以通过其他方式向UPF网元下发分流信息。例如，直接通过I-SMF网元与UPF网元之间的通信消息向UPF网元下发分流信息。For example, the A-SMF network element sends an offload policy to the I-SMF, and the offload policy includes service information of the first service and a first identifier; the I-SMF network element selects a UPF network element according to the first identifier, and the UPF network element has the offload function ; The I-SMF network element issues a packet forwarding rule to the UPF network element, so that the UPF network element distributes the first service to the first DN. Wherein, the packet forwarding rule includes offload information, and the offload information is determined by the I-SMF network element according to the offload policy, or the I-SMF network element may deliver the offload information to the UPF network element in other ways. For example, the offloading information is directly delivered to the UPF network element through the communication message between the I-SMF network element and the UPF network element.

例如，第一标识为DNAI1，控制规则中的一组DNAI为{DNAI1、DNAI2、DNAI3、DNAI4}时，A-SMF网元判断可以触发本地业务分流，并向I-SMF网元发送分流策略，该分流策略中包括DNAI1和对应的业务信息，以便于I-SMF网元根据该分流策略插入DNAI1标识的UPF网元。For example, when the first identifier is DNAI1, and a group of DNAIs in the control rule is {DNAI1, DNAI2, DNAI3, DNAI4}, the A-SMF network element determines that local service offload can be triggered, and sends the offload policy to the I-SMF network element. The offloading strategy includes DNAI1 and corresponding service information, so that the I-SMF network element can insert the UPF network element identified by DNAI1 according to the offloading strategy.

再例如，第一标识为DNAI1，控制规则中的一组DNAI为{DNAI1、DNAI2、DNAI3、DNAI4}，控制规则中的业务信息为“目的IP是IP1”，且UPF网元103检测到的业务信息为“目的IP是IP1”时，A-SMF网元判断可以触发本地业务分流，并向I-SMF网元发送分流策略，该分流策略中包括DNAI1和对应的业务信息“目的IP是IP1”，I-SMF网元根据该分流策略插入与DNAI1标识对应的UPF网元。For another example, the first identifier is DNAI1, a group of DNAIs in the control rule is {DNAI1, DNAI2, DNAI3, DNAI4}, the service information in the control rule is "destination IP is IP1", and the service detected by the UPF network element 103 When the information is "destination IP is IP1", the A-SMF network element determines that local service offload can be triggered, and sends the offloading policy to the I-SMF network element. The offloading policy includes DNAI1 and the corresponding service information "destination IP is IP1". , the I-SMF network element inserts the UPF network element corresponding to the DNAI1 identifier according to the offloading strategy.

再例如，第一标识为DNAI1，控制规则中的一组DNAI为{DNAI1、DNAI2、DNAI3、DNAI4}，控制规则中的业务信息为DNN1，且A-SMF根据UPF网元103检测到的业务信息确定当前会话或当前业务流访问的是DNN1时，A-SMF网元判断可以触发本地业务分流，并向I-SMF网元发送分流策略，该分流策略中包括DNAI1和对应的业务信息，此时业务信息指的是访问DNN1的业务流，I-SMF网元根据该分流策略插入与DNAI1标识对应的UPF网元。For another example, the first identifier is DNAI1, a group of DNAIs in the control rule is {DNAI1, DNAI2, DNAI3, DNAI4}, the service information in the control rule is DNN1, and the A-SMF is based on the service information detected by the UPF network element 103. When it is determined that the current session or the current service flow is accessing DNN1, the A-SMF network element determines that local service offload can be triggered, and sends the offload policy to the I-SMF network element. The offload policy includes DNAI1 and the corresponding service information. The service information refers to the service flow accessing DNN1, and the I-SMF network element inserts the UPF network element corresponding to the DNAI1 identifier according to the distribution strategy.

图4所示的方法中，可选地，在执行S401之前，该方法还可以包括：该A-SMF网元向该I-SMF网元发送订阅请求信息，该订阅请求信息用于订阅数据网络接入标识改变事件。相应地，I-SMF网元接收该订阅请求信息。In the method shown in FIG. 4, optionally, before performing S401, the method may further include: the A-SMF network element sends subscription request information to the I-SMF network element, where the subscription request information is used to subscribe to the data network Access identity change event. Correspondingly, the I-SMF network element receives the subscription request information.

此时，S401的具体实现方式可以包括：该I-SMF网元根据订阅请求消息检测到数据网络接入标识改变事件时，向该A-SMF网元发送事件通知信息，该事件通知信息携带该第一标识。相应地，A-SMF网元从I-SMF网元接收数据网络接入标识改变事件的事件通知消息。例如，如图5所示。At this time, the specific implementation of S401 may include: when the I-SMF network element detects a data network access identifier change event according to the subscription request message, sending event notification information to the A-SMF network element, where the event notification information carries the first logo. Correspondingly, the A-SMF network element receives the event notification message of the data network access identity change event from the I-SMF network element. For example, as shown in Figure 5.

可选地，在执行S401之前，图4所示的方法还可以包括：该A-SMF网元向该I-SMF网元发送至少一个DNAI。相应地，该I-SMF网元从该A-SMF网元接收该至少一个DNAI。例如，如图6所示。Optionally, before performing S401, the method shown in FIG. 4 may further include: the A-SMF network element sending at least one DNAI to the I-SMF network element. Accordingly, the I-SMF network element receives the at least one DNAI from the A-SMF network element. For example, as shown in Figure 6.

例如，A-SMF网元通过上述订阅请求消息向I-SMF网元发送至少一个DNAI。这至少一个DNAI是指A-SMF从PCF网元获取的策略信息中包含的DNAI。For example, the A-SMF network element sends at least one DNAI to the I-SMF network element through the above-mentioned subscription request message. The at least one DNAI refers to the DNAI included in the policy information acquired by the A-SMF from the PCF network element.

此时，该I-SMF网元根据订阅请求消息检测到数据网络接入标识改变事件时，向该A-SMF网元发送事件通知信息，可以包括：该I-SMF网元根据订阅请求消息和该至少一个DNAI，检测到数据网络接入标识改变事件时，向该A-SMF网元发送事件通知消息。At this time, when the I-SMF network element detects a data network access identifier change event according to the subscription request message, sending event notification information to the A-SMF network element may include: the I-SMF network element according to the subscription request message and The at least one DNAI sends an event notification message to the A-SMF network element when detecting a data network access identity change event.

例如，该I-SMF网元根据订阅请求消息，检测到数据网络接入标识改变事件发生，且改变之后的DNAI为该至少一个DNAI中包括的DNAI时，向该A-SMF网元发送事件通知信息，该事件通知信息中包括该改变之后的DNAI。该改变之后的DNAI即为第一标识。For example, the I-SMF network element detects the occurrence of a data network access identifier change event according to the subscription request message, and when the changed DNAI is the DNAI included in the at least one DNAI, it sends an event notification to the A-SMF network element message, the event notification message includes the DNAI after the change. The changed DNAI is the first identification.

其中，该至少一个DNAI可以是能够执行业务分流的UPF网元的标识，这样可以避免改变之后的DNAI对应的UPF网元服务的业务不需要本地分流时，I-SMF网元向A-SMF网元上报第一标识。通过该实现方式，只有当改变后的DNAI为至少一个DNAI中的一个时，I-SMF网元才向A-SMF网元发送事件通知信息，从而减少了I-SMF上报通知信息的次数，有助于节省信令开销。The at least one DNAI may be an identifier of a UPF network element that can perform service offloading, so as to avoid that when the service served by the UPF network element corresponding to the changed DNAI does not require local offloading, the I-SMF network element sends the A-SMF network element to the A-SMF network. Yuan reports the first identifier. Through this implementation, the I-SMF network element sends event notification information to the A-SMF network element only when the changed DNAI is one of at least one DNAI, thereby reducing the number of times that the I-SMF reports notification information. Helps save signaling overhead.

此外，这种实现方式中，I-SMF网元在事件通知消息中上报第一标识，A-SMF网元在接收到该第一标识后，可以不用确定是否需要出发本地业务分流，而是可以直接向I-SMF网元发送分流策略，指示I-SMF网元插入第一标识所标识的UPF网元。In addition, in this implementation manner, the I-SMF network element reports the first identifier in the event notification message, and after receiving the first identifier, the A-SMF network element does not need to determine whether to initiate local service offload, but can The offloading policy is directly sent to the I-SMF network element, and the I-SMF network element is instructed to insert the UPF network element identified by the first identification.

这将结合图6做进一步描述。This will be further described in conjunction with FIG. 6 .

图4所示的方法中，可选地，在执行S401之前，该方法还可以包括：该A-SMF网元向该I-SMF网元发送获取请求消息，该获取请求消息用于请求获取用于接入数据网络的UPF网元的标识；该I-SMF网元接收该获取请求消息。In the method shown in FIG. 4, optionally, before performing S401, the method may further include: the A-SMF network element sends an acquisition request message to the I-SMF network element, where the acquisition request message is used to request the acquisition The identifier of the UPF network element for accessing the data network; the I-SMF network element receives the acquisition request message.

此时，S401的一种可能的实现方式可以包括：该I-SMF网元根据该获取请求消息，向该A-SMF网元发送该获取请求消息的响应消息，该响应消息中包括DNAI列表；A-SMF网元接收该响应消息。At this time, a possible implementation of S401 may include: the I-SMF network element sends a response message of the acquisition request message to the A-SMF network element according to the acquisition request message, and the response message includes a DNAI list; The A-SMF network element receives the response message.

该DNAI列表可以包括I-SMF网元服务范围内的DNAI。例如，如图7所示。The DNAI list may include DNAIs within the service range of the I-SMF network element. For example, as shown in Figure 7.

此时，S402的一种可能的实现方式可以包括：该A-SMF网元根据该响应消息和控制规则，指示I-SMF网元插入用于将第一业务分流至第一DN的UPF网元。At this time, a possible implementation manner of S402 may include: the A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN according to the response message and the control rule .

该A-SMF网元根据该响应消息和控制规则，指示I-SMF网元插入用于将第一业务分流至第一DN的UPF网元，可以包括：A-SMF网元判断控制规则中包括响应消息中的DNAI列表中的全部或部分DNAI时，指示I-SMF网元插入该全部或部分DNAI标识对应的UPF网元。该全部或部分DNAI即为第一标识。其中，指示I-SMF网元插入该全部或部分DNAI标识对应的UPF网元，还可以描述为，I-SMF网元根据该全部或部分DNAI标识，插入对应的UPF网元。The A-SMF network element instructs the I-SMF network element to insert the UPF network element for offloading the first service to the first DN according to the response message and the control rule, which may include: the A-SMF network element determines that the control rule includes: When responding to all or part of the DNAI in the DNAI list in the message, the I-SMF network element is instructed to insert the UPF network element corresponding to the all or part of the DNAI identifier. The whole or part of the DNAI is the first identification. Wherein, instructing the I-SMF network element to insert the UPF network element corresponding to the whole or part of the DNAI identifier can also be described as the I-SMF network element inserting the corresponding UPF network element according to the whole or part of the DNAI identifier.

这种情况下，A-SMF网元指示I-SMF网元插入该全部或部分DNAI标识的UPF网元可以包括：A-SMF网元向I-SMF网元发送控制规则，该控制规则包括该全部或部分DNAI对应的分流策略。即该分流策略为该全部或部分DNAI以及对应的业务信息。In this case, the A-SMF network element instructing the I-SMF network element to insert the UPF network element of the whole or part of the DNAI identifier may include: the A-SMF network element sends a control rule to the I-SMF network element, and the control rule includes the The shunt strategy corresponding to all or part of DNAI. That is, the distribution strategy is the whole or part of the DNAI and the corresponding service information.

例如，该响应消息中的DNAI列表中包括{DNAI1，DNAI2}，控制规则中包括{DNAI1，DNAI2，DNAI3}时，该A-SMF网元向I-SMF网元发送DNAI1和DNAI2以及DNAI1和DNAI2对应的业务信息。For example, when the DNAI list in the response message includes {DNAI1, DNAI2}, and the control rule includes {DNAI1, DNAI2, DNAI3}, the A-SMF network element sends DNAI1 and DNAI2 and DNAI1 and DNAI2 to the I-SMF network element Corresponding business information.

I-SMF网元从A-SMF网元接收分流策略后，I-SMF网元判断分流策略中的DNAI1或DNAI2与UE当前位置的标识信息是否匹配。其中，UE当前位置的标识信息可以是基站标识，也可以是跟踪区域标识；DNAI1或DNAI2可以是跟踪区域标识列表，该列表中可以包括至少一个跟踪区域标识，或者，DNAI1或DNAI2可以是跟踪区域标识列表的索引，该索引与跟踪区域标识列表之间具有对应关系，或者，DNAI1或DNAI2可以是UPF网元列表，该列表中可以包括至少一个UPF网元。After the I-SMF network element receives the offload policy from the A-SMF network element, the I-SMF network element determines whether DNAI1 or DNAI2 in the offload policy matches the identification information of the current location of the UE. The identification information of the current location of the UE may be a base station identification or a tracking area identification; DNAI1 or DNAI2 may be a tracking area identification list, and the list may include at least one tracking area identification, or DNAI1 or DNAI2 may be a tracking area. The index of the identification list, which has a corresponding relationship with the tracking area identification list, or DNAI1 or DNAI2 may be a UPF network element list, and the list may include at least one UPF network element.

以DNAI1为跟踪区域标识列表，UE当前的位置标识信息为跟踪区域标识为例，若DNAI1包含UE当前的位置标识信息，则I-SMF网元确定DNAI1与UE当前位置的标识信息匹配。Taking DNAI1 as the tracking area identifier list and the current location identifier information of the UE as the tracking area identifier as an example, if DNAI1 contains the current location identifier information of the UE, the I-SMF network element determines that the DNAI1 matches the identifier information of the current location of the UE.

以DNAI1为跟踪区域标识列表，UE当前的位置标识信息为基站标识为例，I-SMF网元可以先根据基站标识与跟踪区域标识之间的对应关系确定UE当前的位置标识信息对应的跟踪区域标识，然后判断DNAI1是否包含与UE当前的位置标识信息对应的跟踪区域标识。若包含，则I-SMF网元确定DNAI1与UE当前位置的标识信息匹配。Taking DNAI1 as the tracking area identifier list and the current location identifier information of the UE as the base station identifier as an example, the I-SMF network element can first determine the tracking area corresponding to the current location identifier information of the UE according to the correspondence between the base station identifier and the tracking area identifier. identification, and then determine whether the DNAI1 contains the tracking area identification corresponding to the current location identification information of the UE. If included, the I-SMF network element determines that the DNAI1 matches the identification information of the current location of the UE.

以DNAI1为UPF网元列表，UE当前的位置标识信息为跟踪区域标识为例，I-SMF网元可以先根据UPF网元列表确定UPF列表对应的服务范围，然后判断UE当前的位置标识是否在UPF列表中的UPF网元的服务范围内。如果在，则I-SMF网元确定DNAI1与UE当前位置的标识信息匹配。Taking DNAI1 as the UPF network element list and the current location identifier of the UE as the tracking area identifier as an example, the I-SMF network element can first determine the service range corresponding to the UPF list according to the UPF network element list, and then determine whether the current location identifier of the UE is within Within the service range of the UPF network elements in the UPF list. If so, the I-SMF network element determines that the DNAI1 matches the identification information of the current location of the UE.

这将结合图7做进一步描述。This will be further described in conjunction with FIG. 7 .

可选地，该A-SMF网元向该I-SMF网元发送获取请求消息的情况下，在执行S401之前，该方法还可以包括：该A-SMF网元向该I-SMF网元发送至少一个DNAI，该I-SMF网元接收该至少一个DNAI。该至少一个DNAI可以携带在获取请求消息中。例如，如图8所示。Optionally, in the case where the A-SMF network element sends an acquisition request message to the I-SMF network element, before performing S401, the method may further include: the A-SMF network element sends an acquisition request message to the I-SMF network element At least one DNAI that the I-SMF network element receives. The at least one DNAI may be carried in the get request message. For example, as shown in Figure 8.

此时，该I-SMF网元根据该获取请求消息，向该A-SMF网元发送该获取请求消息的响应消息，可以包括，该I-SMF网元根据该至少一个DNAI、以及I-SMF网元服务范围内的DNAI，向该A-SMF网元发送该获取请求消息的响应消息，该响应消息中包括DNAI列表，该DNAI列表中包括的DNAI属于该至少一个DNAI。该DNAI列表中包括的DNAI为第一标识。At this time, the I-SMF network element sends a response message of the acquisition request message to the A-SMF network element according to the acquisition request message, which may include: the I-SMF network element according to the at least one DNAI and the I-SMF network element The DNAI within the service range of the network element sends a response message of the acquisition request message to the A-SMF network element, where the response message includes a DNAI list, and the DNAIs included in the DNAI list belong to the at least one DNAI. The DNAI included in the DNAI list is the first identifier.

例如，该至少一个DNAI为{DNAI1，DNAI2，DNAI3，DNAI4}，I-SMF网元服务范围的DNAI为{DNAI1，DNAI2，DNAI5}，那么I-SMF网元返回的DNAI列表可以为{DNAI1，DNAI2}。For example, the at least one DNAI is {DNAI1, DNAI2, DNAI3, DNAI4}, and the DNAIs in the service range of the I-SMF network element are {DNAI1, DNAI2, DNAI5}, then the DNAI list returned by the I-SMF network element can be {DNAI1, DNAI2}.

其中，该至少一个DNAI可以是控制规则中的DNAI，这样可以避免I-SMF网元服务范围的UPF网元服务的业务不需要本地分流时，I-SMF网元向A-SMF网元上报第一标识。也就是说，在本实现方式下，I-SMF网元向A-SMF网元上报的第一标识一定在控制规则中的至少一个DNAI中，这样可以减少I-SMF网元与A-SMF网元之间的信令传输开销。The at least one DNAI may be the DNAI in the control rule, so as to avoid that the I-SMF network element reports to the A-SMF network element the first an identification. That is to say, in this implementation manner, the first identifier reported by the I-SMF network element to the A-SMF network element must be in at least one DNAI in the control rule, which can reduce the number of I-SMF network elements and A-SMF network elements. Signaling overhead between elements.

此外，这种实现方式中，A-SMF网元在接收到该第一标识后，向I-SMF网元发送分流策略，指示I-SMF网元插入第一标识对应的UPF网元。其中，指示I-SMF网元插入第一标识对应的UPF网元，还可以描述为I-SMF网元根据分流策略，插入对应的UPF网元。In addition, in this implementation manner, after receiving the first identifier, the A-SMF network element sends an offload policy to the I-SMF network element, instructing the I-SMF network element to insert the UPF network element corresponding to the first identifier. Wherein, instructing the I-SMF network element to insert the UPF network element corresponding to the first identifier can also be described as the I-SMF network element inserting the corresponding UPF network element according to the offload policy.

这将结合图8做进一步描述。This will be further described in conjunction with FIG. 8 .

可选地，A-SMF网元向I-SMF网元发送获取请求消息，I-SMF网元在该获取请求消息的响应消息中携带该I-SMF网元服务范围的UPF网元的DNAI列表的情况下，图4所示的方法中可以包括：A-SMF网元根据响应消息中的DNAI列表和控制规则中的DNAI列表，向该I-SMF网元发送订阅请求消息，该订阅请求消息用于订阅DNAI改变事件；其中，该订阅请求消息中可以包括响应消息中的DNAI列表和控制规则中的DNAI列表中均包含的DNAI；I-SMF网元接收该订阅请求消息后，在检测到UE当前位置所在的DNAI发生改变且改变后的DNAI为订阅请求消息订阅的DNAI中的DNAI(即第一标识)时，I-SMF网元向A-SMF网元发送事件通知消息，该事件通知消息中包括该第一标识；A-SMF网元接收该事件通知消息后，向I-SMF网元发送控制规则中与第一标识相关的分流策略，该分流策略包括第一标识以及第一标识对应的业务信息；I-SMF网元接收该分流策略，并根据该分流策略插入第一标识对应的UPF网元，以便于UPF网元进行第一业务分流。例如，如图9所示。Optionally, the A-SMF network element sends an acquisition request message to the I-SMF network element, and the I-SMF network element carries the DNAI list of the UPF network elements in the service range of the I-SMF network element in the response message of the acquisition request message. 4 may include: the A-SMF network element sends a subscription request message to the I-SMF network element according to the DNAI list in the response message and the DNAI list in the control rule, the subscription request message Used for subscribing to the DNAI change event; wherein, the subscription request message may include the DNAI included in the DNAI list in the response message and the DNAI list in the control rule; after the I-SMF network element receives the subscription request message, it detects that When the DNAI where the current location of the UE is located changes and the changed DNAI is the DNAI (ie, the first identifier) in the DNAI subscribed by the subscription request message, the I-SMF network element sends an event notification message to the A-SMF network element. The message includes the first identifier; after receiving the event notification message, the A-SMF network element sends an offload policy related to the first identifier in the control rule to the I-SMF network element, where the offload policy includes the first identifier and the first identifier Corresponding service information; the I-SMF network element receives the offloading strategy, and inserts the UPF network element corresponding to the first identifier according to the offloading strategy, so as to facilitate the UPF network element to offload the first service. For example, as shown in Figure 9.

例如，I-SMF网元发送的响应消息中的DNAI列表中包括{DNAI1，DNAI2}，控制规则中的DNAI列表中包括{DNAI1，DNAI3，DNAI4}时，订阅请求消息中可以携带DNAI1。For example, when the DNAI list in the response message sent by the I-SMF network element includes {DNAI1, DNAI2}, and the DNAI list in the control rule includes {DNAI1, DNAI3, DNAI4}, the subscription request message can carry DNAI1.

这将结合图9做进一步描述。This will be further described in conjunction with FIG. 9 .

可选地，图4所示的方法可以发生在I-SMF网元的插入流程后。Optionally, the method shown in FIG. 4 may occur after the insertion process of the I-SMF network element.

例如，可以在I-SMF网元插入结束后，A-SMF网元向I-SMF网元发送订阅请求消息和A-SMF网元从I-SMF网元接收事件通知消息。For example, after the insertion of the I-SMF network element is completed, the A-SMF network element sends a subscription request message to the I-SMF network element and the A-SMF network element receives an event notification message from the I-SMF network element.

例如，可以在I-SMF网元插入结束后，A-SMF网元向I-SMF网元发送获取请求消息和A-SMF网元从I-SMF网元接收响应消息。For example, after the insertion of the I-SMF network element is completed, the A-SMF network element sends an acquisition request message to the I-SMF network element and the A-SMF network element receives a response message from the I-SMF network element.

可选地，图4所示的方法可以发生在I-SMF网元的插入流程中。Optionally, the method shown in FIG. 4 may occur in the insertion process of the I-SMF network element.

例如，在UE移出A-SMF网元的服务范围、触发I-SMF网元的插入过程中，A-SMF网元可以向I-SMF网元发送订阅请求消息。当I-SMF检测到A-SMF订阅的事件发生时，A-SMF网元从I-SMF网元接收事件通知消息。For example, when the UE moves out of the service range of the A-SMF network element and triggers the insertion of the I-SMF network element, the A-SMF network element may send a subscription request message to the I-SMF network element. When the I-SMF detects the occurrence of an event subscribed by the A-SMF, the A-SMF network element receives an event notification message from the I-SMF network element.

例如，在UE移出A-SMF网元的服务范围、触发I-SMF网元的插入过程中，A-SMF网元可以向I-SMF网元发送获取请求消息和A-SMF网元从I-SMF网元接收响应消息。For example, when the UE moves out of the service range of the A-SMF network element and triggers the insertion of the I-SMF network element, the A-SMF network element can send an acquisition request message to the I-SMF network element and the A-SMF network element The SMF network element receives the response message.

应理解，图4中所示的方法同样可以适用于漫游场景。漫游场景下，图4所示的方法中的I-SMF位于拜访域公用陆地移动网(Visited Public Land Mobile Network,V-PLMN)，充当拜访地会话管理功能(visited-SMF，V-SMF)网元；A-SMF位于归属域公用陆地移动网(Homed Public Land Mobile Network,H-PLMN)，充当归属地会话管理功能(homed-SMF，H-SMF)网元。It should be understood that the method shown in FIG. 4 can also be applied to a roaming scenario. In the roaming scenario, the I-SMF in the method shown in FIG. 4 is located in the Visited Public Land Mobile Network (V-PLMN) in the visited domain and serves as the Visited-SMF (Visited-SMF, V-SMF) network. The A-SMF is located in the Homed Public Land Mobile Network (H-PLMN) and acts as a homed-SMF (H-SMF) network element.

下面结合图5至图9，更为详细地介绍图4所示的指示业务分流的方法的流程。The flow of the method for indicating service offloading shown in FIG. 4 will be described in more detail below with reference to FIGS. 5 to 9 .

图5所示的指示业务分流的方法中包括S501至S506。The method for indicating service offload shown in FIG. 5 includes S501 to S506.

S501，A-SMF网元从PCF网元获取策略信息。该策略信息中包括控制规则，该控制规则可以是策略与计费控制(policy and charging control，PCC)规则(rules)。S501, the A-SMF network element obtains policy information from the PCF network element. The policy information includes control rules, and the control rules may be policy and charging control (policy and charging control, PCC) rules (rules).

该策略信息可以包括分流策略，例如PCC规则中可以包括分流策略，以便于A-SMF根据分流策略决定是否触发分流。The policy information may include an offload policy, for example, a PCC rule may include a traffic offload policy, so that the A-SMF can decide whether to trigger offload according to the offload policy.

例如，该分流策略可以包含待分流业务的业务信息和该业务信息对应的位置信息。For example, the offload policy may include service information of the service to be offloaded and location information corresponding to the service information.

其中，业务信息可以由应用来标识或IP五元组来标识，或者可以由DNN或S-NSSAI来标识。The service information may be identified by an application or an IP quintuple, or may be identified by a DNN or an S-NSSAI.

业务信息对应的位置信息可以由一组DNAI来标识。The location information corresponding to the service information can be identified by a set of DNAIs.

S502，A-SMF网元向I-SMF网元发送订阅请求消息，该订阅请求消息携带订阅的事件信息。S502, the A-SMF network element sends a subscription request message to the I-SMF network element, where the subscription request message carries the subscription event information.

事件信息，用于表示A-SMF订阅的是DNAI改变(change of DNAI)事件。事件信息可以由预先约定好的事件标识(identity，ID)表示。Event information, used to indicate that the A-SMF subscribes to a DNAI change (change of DNAI) event. The event information may be represented by a pre-agreed event identifier (identity, ID).

S503，I-SMF网元根据订阅请求消息，检测到DNAI改变事件发生后，向A-SMF网元发送事件通知消息，该事件通知消息中携带UE当前位置对应的DNAI。该DNAI即为图4所示的方法中的第一标识。S503: After detecting the occurrence of a DNAI change event according to the subscription request message, the I-SMF network element sends an event notification message to the A-SMF network element, where the event notification message carries the DNAI corresponding to the current location of the UE. The DNAI is the first identifier in the method shown in FIG. 4 .

例如，UE从A-SMF网元的服务范围移动到I-SMF网元之后，I-SMF网元会根据订阅请求消息检测UE当前位置对应的DNAI是否发生了改变。I-SMF检测到UE当前位置对应的DNAI从DNAI1改变为DNAI2后，向A-SMF网元发送事件通知消息，该事件通知消息中携带改变之后的DNAI2。For example, after the UE moves from the service range of the A-SMF network element to the I-SMF network element, the I-SMF network element will detect whether the DNAI corresponding to the current location of the UE has changed according to the subscription request message. After detecting that the DNAI corresponding to the current location of the UE is changed from DNAI1 to DNAI2, the I-SMF sends an event notification message to the A-SMF network element, and the event notification message carries the changed DNAI2.

其中，S502和S503可以发生在I-SMF网元的插入流程中。例如，UE从图2或图3中的区域1移动到区域2，即移出了SMF网元105的服务范围后，插入SMF网元108，在该过程中执行S502和S503。Wherein, S502 and S503 may occur in the insertion process of the I-SMF network element. For example, after the UE moves from the area 1 in FIG. 2 or FIG. 3 to the area 2, that is, after moving out of the service range of the SMF network element 105, the UE is inserted into the SMF network element 108, and S502 and S503 are performed in this process.

或者，S502和S503可以发生在I-SMF网元的插入流程后。例如，在图2或图3中的SMF网元108的插入流程结束后，执行S502和S503。Alternatively, S502 and S503 may occur after the insertion process of the I-SMF network element. For example, after the insertion process of the SMF network element 108 in FIG. 2 or FIG. 3 ends, S502 and S503 are executed.

S504，A-SMF网元根据S503中的事件通知消息中的DNAI以及S501中获取的分流策略，决定是否触发本地业务分流。S504, the A-SMF network element decides whether to trigger local service offload according to the DNAI in the event notification message in S503 and the offload policy obtained in S501.

当事件通知消息中的DNAI满足分流策略时，A-SMF网元决定触发本地业务分流。When the DNAI in the event notification message satisfies the offload policy, the A-SMF network element decides to trigger the offload of local services.

事件通知消息中的DNAI满足分流策略，可以理解为：分流策略所指示的一组DNAI中包括UE当前位置对应的DNAI。The DNAI in the event notification message satisfies the offload policy, which can be understood as: the set of DNAIs indicated by the offload policy includes the DNAI corresponding to the current location of the UE.

可选的，UE当前的业务流信息也要满足分流策略，可以理解为：UPF网元103检测业务信息，并向A-SMF发送检测到的业务信息，分流策略所指示的业务信息中包括该UPF网元103检测到的业务信息。Optionally, the current service flow information of the UE should also satisfy the offload policy, which can be understood as: the UPF network element 103 detects the service information, and sends the detected service information to the A-SMF, and the service information indicated by the offload policy includes the service information. Service information detected by the UPF network element 103 .

例如，UE当前所在位置对应的DNAI是DNAI1，分流策略中的一组DNAI是{DNAI1，DNAI2，DNAI3}时，A-SMF网元判断UE当前所在位置对应的DNAI满足分流策略，则A-SMF决定触发本地业务分流。For example, when the DNAI corresponding to the current location of the UE is DNAI1, and a set of DNAIs in the offload policy is {DNAI1, DNAI2, DNAI3}, the A-SMF network element determines that the DNAI corresponding to the current location of the UE satisfies the offload policy, then the A-SMF Decided to trigger local business offloading.

再例如，UPF网元103检测到的业务信息为目的IP为IP1，分流策略中的业务信息是{目的IP为IP1，DNN，APP1}时，A-SMF决定触发本地业务分流的条件还包括：A-SMF网元判断UE当前的业务信息满足分流策略。For another example, when the service information detected by the UPF network element 103 is that the destination IP is IP1, and the service information in the offload policy is {destination IP is IP1, DNN, APP1}, the conditions for the A-SMF to decide to trigger the local service offload also include: The A-SMF network element determines that the current service information of the UE satisfies the offload policy.

S505，A-SMF网元向I-SMF网元发送与DNAI1相关的分流策略。S505, the A-SMF network element sends the offload policy related to DNAI1 to the I-SMF network element.

例如，A-SMF网元向I-SMF网元发送DNAI1以及与DNAI1对应的业务信息。For example, the A-SMF network element sends DNAI1 and service information corresponding to the DNAI1 to the I-SMF network element.

S506，I-SMF网元根据分流策略，执行本地业务分流。S506, the I-SMF network element performs local service offload according to the offload policy.

例如，I-SMF网元执行ULCL网元或BP插入流程。For example, the I-SMF network element performs the ULCL network element or the BP insertion procedure.

例如，图2或图3中，I-SMF网元选择UPF网元109，建立AN设备102、UPF网元109和UPF网元103之间的用户面连接等。For example, in FIG. 2 or FIG. 3, the I-SMF network element selects the UPF network element 109, and establishes a user plane connection between the AN device 102, the UPF network element 109 and the UPF network element 103, and the like.

图6所示的指示业务分流的方法中包括S601至S605。The method for indicating service offload shown in FIG. 6 includes S601 to S605.

S601可以参考S501，此处不再赘述。S601 can refer to S501, which will not be repeated here.

S602，A-SMF网元向I-SMF网元发送订阅请求消息，该订阅请求消息携带订阅的DNAI改变事件信息和至少一个DNAI。该至少一个DNAI为分流策略中包括的DNAI。S602, the A-SMF network element sends a subscription request message to the I-SMF network element, where the subscription request message carries the subscribed DNAI change event information and at least one DNAI. The at least one DNAI is the DNAI included in the diversion strategy.

S603，I-SMF网元根据订阅请求消息，检测到UE当前位置对应的DNAI发生改变，且改变后的DNAI包含于S602中的至少一个DNAI中，则I-SMF网元向A-SMF网元发送事件通知消息，该事件通知消息中携带UE当前位置对应的DNAI。该DNAI即为图4所示的方法中的第一标识。S603, the I-SMF network element detects that the DNAI corresponding to the current location of the UE has changed according to the subscription request message, and the changed DNAI is included in at least one DNAI in S602, and the I-SMF network element sends the A-SMF network element to the A-SMF network element. Send an event notification message, where the event notification message carries the DNAI corresponding to the current location of the UE. The DNAI is the first identifier in the method shown in FIG. 4 .

例如，订阅请求消息中携带的至少一个DNAI为{DNAI1，DNAI2，DNAI3}，且UE当前位置对应的DNAI为DNAI1时，事件通知消息中携带DNAI1。For example, when at least one DNAI carried in the subscription request message is {DNAI1, DNAI2, DNAI3}, and the DNAI corresponding to the current location of the UE is DNAI1, the event notification message carries DNAI1.

其中，S602和S603可以发生在I-SMF网元的插入流程中。例如，UE从图2或图3中的区域1移动到区域2，即移出了SMF网元105的服务范围后，插入SMF网元108，在该插入过程中执行S602和S603。Among them, S602 and S603 may occur in the insertion process of the I-SMF network element. For example, after the UE moves from the area 1 in FIG. 2 or FIG. 3 to the area 2, that is, moves out of the service range of the SMF network element 105, the UE is inserted into the SMF network element 108, and S602 and S603 are performed during the insertion process.

或者，S602和S603可以发生在I-SMF网元的插入流程后。例如，在图2或图3中的SMF网元108的插入流程结束后，执行S602和S603。Alternatively, S602 and S603 may occur after the insertion process of the I-SMF network element. For example, after the insertion process of the SMF network element 108 in FIG. 2 or FIG. 3 ends, S602 and S603 are executed.

S604至S605可以参考S505至S506，此处不再赘述。S604 to S605 may refer to S505 to S506, which will not be repeated here.

图7所示的指示业务分流的方法中包括S701至S705。The method for indicating service offload shown in FIG. 7 includes S701 to S705.

S701可以参考S701，此处不再赘述。For S701, reference may be made to S701, which will not be repeated here.

S702，A-SMF网元向I-SMF网元发送获取请求消息，请求获取DNAI。S702, the A-SMF network element sends an acquisition request message to the I-SMF network element, requesting to acquire the DNAI.

S703，I-SMF网元向A-SMF网元返回响应消息，响应消息中携带DNAI信息。该DNAI信息表示的是I-SMF网元服务范围内的本地业务部署情况。S703, the I-SMF network element returns a response message to the A-SMF network element, where the response message carries DNAI information. The DNAI information indicates the deployment of local services within the service range of the I-SMF network element.

例如，该DNAI信息中包括I-SMF网元服务范围内的DNAI。该DNAI信息中包括的DNAI即为第一标识。For example, the DNAI information includes the DNAI within the service range of the I-SMF network element. The DNAI included in the DNAI information is the first identifier.

其中，S702和S703可以发生在I-SMF网元的插入流程中。例如，UE从图2或图3中的区域1移动到区域2，即移出了SMF网元105的服务范围后，插入SMF网元108，在该插入过程中执行S702和S703。Among them, S702 and S703 may occur in the insertion process of the I-SMF network element. For example, after the UE moves from the area 1 in FIG. 2 or FIG. 3 to the area 2, that is, moves out of the service range of the SMF network element 105, the UE is inserted into the SMF network element 108, and S702 and S703 are performed during the insertion process.

或者，S702和S703可以发生在I-SMF网元的插入流程后。例如，在图2或图3中的SMF网元108的插入流程结束后，执行S702和S703。Alternatively, S702 and S703 may occur after the insertion process of the I-SMF network element. For example, after the insertion process of the SMF network element 108 in FIG. 2 or FIG. 3 ends, S702 and S703 are executed.

S704，A-SMF网元根据S703中DNAI信息以及S701中的策略信息，向I-SMF网元发送与S703中的DNAI信息相关的分流策略。S704, the A-SMF network element sends, according to the DNAI information in S703 and the policy information in S701, the offloading policy related to the DNAI information in S701 to the I-SMF network element.

例如，DNAI信息中包括{DNAI1}，分流策略中的一组DNAI包括{DNAI1，DNAI2，DNAI3}时，A-SMF网元向I-SMF网元发送与DNAI1相关的分流策略。For example, when the DNAI information includes {DNAI1}, and a group of DNAIs in the offload policy includes {DNAI1, DNAI2, DNAI3}, the A-SMF network element sends the offload policy related to DNAI1 to the I-SMF network element.

S705，I-SMF网元根据分流策略，执行本地业务分流。S705, the I-SMF network element performs local service offload according to the offload policy.

例如，I-SMF网元检测到UE当前位置位于DNAI1时，执行ULCL网元或BP插入流程。For example, when the I-SMF network element detects that the current position of the UE is located at DNAI1, the ULCL network element or the BP insertion process is performed.

图8所示的指示业务分流的方法中包括S801至S805。The method for indicating service offload shown in FIG. 8 includes S801 to S805.

S801可以参考S501，此处不再赘述。For S801, reference may be made to S501, which will not be repeated here.

S802，A-SMF网元向I-SMF网元发送获取请求消息，请求获取DNAI。该获取请求消息中携带至少一个DNAI。该至少一个DNAI为分流策略中包括的DNAI。S802, the A-SMF network element sends an acquisition request message to the I-SMF network element, requesting to acquire the DNAI. The acquisition request message carries at least one DNAI. The at least one DNAI is the DNAI included in the diversion strategy.

S803，I-SMF网元向A-SMF网元返回响应消息，响应消息中携带DNAI信息。该DNAI信息表示上述至少一个DNAI中位于I-SMF网元服务范围内的DNAI。该DNAI信息中包括的DNAI即为第一标识。S803, the I-SMF network element returns a response message to the A-SMF network element, where the response message carries DNAI information. The DNAI information represents the DNAI located within the service range of the I-SMF network element in the at least one DNAI. The DNAI included in the DNAI information is the first identifier.

其中，S802和S803可以发生在I-SMF网元的插入流程中。例如，UE从图2或图3中的区域1移动到区域2，即移出了SMF网元105的服务范围后，SMF网元108的插入过程中可以执行S802和S803。Among them, S802 and S803 may occur in the insertion process of the I-SMF network element. For example, after the UE moves from the area 1 in FIG. 2 or FIG. 3 to the area 2, that is, moves out of the service range of the SMF network element 105, S802 and S803 may be performed during the insertion of the SMF network element 108.

或者，S802和S803可以发生在I-SMF网元的插入流程后。例如，在图2或图3中的SMF网元108的插入流程结束后，执行S802和S803。Alternatively, S802 and S803 may occur after the insertion process of the I-SMF network element. For example, after the insertion process of the SMF network element 108 in FIG. 2 or FIG. 3 ends, S802 and S803 are executed.

S804至S805可以参考S505至S506，此处不再赘述。S804 to S805 may refer to S505 to S506, which will not be repeated here.

图9所示的指示业务分流的方法中包括S901至S907。The method for indicating service offload shown in FIG. 9 includes S901 to S907.

S901可以参考S501，此处不再赘述。For S901, reference may be made to S501, which will not be repeated here.

S902，A-SMF网元向I-SMF网元发送获取请求消息，请求获取DNAI。S902, the A-SMF network element sends an acquisition request message to the I-SMF network element, requesting to acquire the DNAI.

S903，I-SMF网元向A-SMF网元返回响应消息，响应消息中携带DNAI信息。该DNAI信息表示I-SMF网元服务范围内的本地业务部署情况。S903, the I-SMF network element returns a response message to the A-SMF network element, where the response message carries DNAI information. The DNAI information indicates the local service deployment situation within the service range of the I-SMF network element.

例如，该DNAI信息中包括I-SMF网元服务范围内的DNAI。For example, the DNAI information includes the DNAI within the service range of the I-SMF network element.

S904，A-SMF网元向I-SMF网元发送订阅请求消息，该订阅请求消息携带订阅的DNAI改变事件信息和至少一个DNAI。该至少一个DNAI为既包含于策略信息中又位于I-SMF网元服务范围内的DNAI。S904, the A-SMF network element sends a subscription request message to the I-SMF network element, where the subscription request message carries the subscribed DNAI change event information and at least one DNAI. The at least one DNAI is a DNAI both included in the policy information and located within the service range of the I-SMF network element.

例如，I-SMF网元服务范围内的DNAI包括{DNAI1，DNAI2}，策略信息中的一组DNAI包括{DNAI1，DNAI2，DNAI3}，则该至少一个DNAI包括DNAI1和DNAI2。For example, the DNAIs within the service range of the I-SMF network element include {DNAI1, DNAI2}, and a group of DNAIs in the policy information includes {DNAI1, DNAI2, DNAI3}, then the at least one DNAI includes DNAI1 and DNAI2.

S905，I-SMF网元根据订阅请求消息，检测到UE当前位置对应的DNAI发生改变，且改变后的DNAI位于S904中的至少一个DNAI中，则I-SMF网元向A-SMF网元发送事件通知消息，该事件通知消息中携带UE当前位置对应的DNAI。该对应的DNAI即为图4所示的方法中的第一标识。S905, the I-SMF network element detects that the DNAI corresponding to the current location of the UE has changed according to the subscription request message, and the changed DNAI is located in at least one DNAI in S904, the I-SMF network element sends the A-SMF network element to the A-SMF network element. An event notification message, where the event notification message carries the DNAI corresponding to the current location of the UE. The corresponding DNAI is the first identifier in the method shown in FIG. 4 .

例如，订阅请求消息中携带的至少一个DNAI为{DNAI1，DNAI2}，且UE当前所在位置对应的DNAI为DNAI1时，事件通知消息中携带DNAI1。For example, when at least one DNAI carried in the subscription request message is {DNAI1, DNAI2}, and the DNAI corresponding to the current location of the UE is DNAI1, the event notification message carries DNAI1.

其中，S902至S905可以发生在I-SMF网元的插入流程中。例如，UE从图2或图3中的区域1移动到区域2，即移出了SMF网元105的服务范围后，插入SMF网元108，在插入过程中执行S902至S905。Among them, S902 to S905 may occur in the insertion process of the I-SMF network element. For example, after the UE moves from the area 1 in FIG. 2 or FIG. 3 to the area 2, that is, moves out of the service range of the SMF network element 105, the UE is inserted into the SMF network element 108, and S902 to S905 are performed during the insertion process.

或者，S902至S905可以发生在I-SMF网元的插入流程后。例如，在图2或图3中的SMF网元108的插入流程结束后，执行S902至S905。Alternatively, S902 to S905 may occur after the insertion process of the I-SMF network element. For example, after the insertion process of the SMF network element 108 in FIG. 2 or FIG. 3 ends, S902 to S905 are executed.

S906至S907可以参考S505至S506，此处不再赘述。S906 to S907 may refer to S505 to S506, which will not be repeated here.

图10是本申请一个实施例的指示业务分流的装置的示意性结构图。应理解，图10示出的指示业务分流的装置1000仅是示例，FIG. 10 is a schematic structural diagram of an apparatus for indicating service offload according to an embodiment of the present application. It should be understood that the apparatus 1000 for indicating service offload shown in FIG. 10 is only an example,

指示业务分流的装置1000可以包括通信模块1010和处理模块1020。The apparatus 1000 for indicating service offload may include a communication module 1010 and a processing module 1020 .

指示业务分流的装置1000可以用于执行图2至图9中任意一个所示的方法中由A-SMF网元执行的步骤。指示业务分流的装置1000的一种示例为ASMF。The apparatus 1000 for indicating service offload can be used to perform the steps performed by the A-SMF network element in any of the methods shown in FIG. 2 to FIG. 9 . An example of the apparatus 1000 for indicating traffic offload is ASMF.

例如，通信模块1010，用于从中间会话管理功能网元接收第一标识，第一标识用于标识接入第一数据网络的用户面功能网元。For example, the communication module 1010 is configured to receive a first identifier from an intermediate session management function network element, where the first identifier is used to identify a user plane function network element accessing the first data network.

处理模块1020，用于根据第一标识，指示中间会话管理功能网元插入所述用户面功能网元，所述用户面功能网元用于将第一业务分流至第一数据网络。The processing module 1020 is configured to instruct, according to the first identifier, an intermediate session management function network element to insert the user plane function network element, and the user plane function network element is configured to offload the first service to the first data network.

在一种可能的实现方式中，处理模块1020可以具体用于：根据第一标识以及控制规则，指示中间会话管理功能网元插入将第一业务分流至第一数据网络的用户面功能网元。In a possible implementation manner, the processing module 1020 may be specifically configured to: instruct the intermediate session management function network element to insert the user plane function network element that offloads the first service to the first data network according to the first identifier and the control rule.

在一种可能的实现方式中，处理模块1020可以具体用于：根据第一标识，确定触发第一业务的本地分流。In a possible implementation manner, the processing module 1020 may be specifically configured to: determine, according to the first identifier, to trigger the local offload of the first service.

在一种可能的实现方式中，通信模块1010可以还用于：从中间会话管理功能网元接收第一标识之前，向中间会话管理功能网元发送订阅请求信息，订阅请求信息用于订阅数据网络接入标识改变事件。In a possible implementation manner, the communication module 1010 may be further configured to: before receiving the first identifier from the intermediate session management function network element, send subscription request information to the intermediate session management function network element, where the subscription request information is used to subscribe to the data network Access identity change event.

其中，通信模块1010可以具体用于从中间会话管理功能网元接收数据网络接入标识改变事件的事件通知信息，事件通知信息携带第一标识。The communication module 1010 may be specifically configured to receive event notification information of a data network access identifier change event from an intermediate session management function network element, where the event notification information carries the first identifier.

在一种可能的实现方式中，通信模块1010从中间会话管理功能网元接收第一标识之前，还用于向中间会话管理功能网元发送获取请求消息，获取请求消息用于请求获取用于接入数据网络的用户面功能网元的标识。In a possible implementation manner, before receiving the first identifier from the intermediate session management function network element, the communication module 1010 is further configured to send an acquisition request message to the intermediate session management function network element, where the acquisition request message is used to request acquisition for receiving The identifier of the user plane functional network element entering the data network.

在一种可能的实现方式中，通信模块1010从中间会话管理功能网元接收第一标识之前，还用于向中间会话管理功能网元发送至少一个数据网络接入标识，其中，所述至少一个数据网络接入标识中包括第一标识。In a possible implementation manner, before receiving the first identifier from the intermediate session management function network element, the communication module 1010 is further configured to send at least one data network access identifier to the intermediate session management function network element, wherein the at least one The data network access identifier includes the first identifier.

通信模块1010向中间会话管理功能网元发送获取请求消息的情况下，在一种可能的实现方式中，通信模块1010向中间会话管理功能网元发送至少一个数据网络接入标识之前，还可以用于：When the communication module 1010 sends the acquisition request message to the intermediate session management function network element, in a possible implementation manner, before the communication module 1010 sends the at least one data network access identifier to the intermediate session management function network element, it can also use At:

从中间会话管理功能网元接收获取请求消息的响应消息，响应消息中包括数据网络接入标识列表，数据网络接入标识列表中包括第一标识；Receive a response message for the acquisition request message from the intermediate session management function network element, where the response message includes a data network access identifier list, and the data network access identifier list includes a first identifier;

根据数据网络接入标识列表和控制规则，确定所述至少一个数据网络接入标识。The at least one data network access identifier is determined according to the data network access identifier list and the control rule.

在一种可能的实现方式中，装置1000可以应用于中间会话管理功能网元的插入过程中，或，可以应用于中间会话管理功能网元插入过程完成后。In a possible implementation manner, the apparatus 1000 may be applied to the insertion process of the intermediate session management function network element, or may be applied to the completion of the intermediate session management function network element insertion process.

指示业务分流的装置1000可以用于执行图2至图9中任意一个所示的方法中由I-SMF网元执行的步骤。指示业务分流的装置1000的一种示例为I-SMF。The apparatus 1000 for instructing traffic offloading can be used to perform the steps performed by the I-SMF network element in the method shown in any one of FIG. 2 to FIG. 9 . An example of the apparatus 1000 for indicating traffic offload is I-SMF.

例如，通信模块1010，用于向锚点会话管理功能网元发送第一标识，第一标识用于标识接入第一数据网络的用户面功能网元。For example, the communication module 1010 is configured to send the first identifier to the anchor session management function network element, where the first identifier is used to identify the user plane function network element accessing the first data network.

处理模块1020，用于在锚点会话管理功能网元的指示下，插入所述用户面功能网元，所述用户面功能网元用于将第一业务分流至第一数据网络。The processing module 1020 is configured to insert the user plane function network element under the instruction of the anchor session management function network element, and the user plane function network element is configured to offload the first service to the first data network.

在一种可能的实现方式中，通信模块1010向锚点会话管理功能网元发送第一标识之前，还可以用于从锚点会话管理功能网元接收订阅请求信息，订阅请求信息用于订阅数据网络接入标识改变事件。In a possible implementation manner, before sending the first identifier to the anchor session management function network element, the communication module 1010 may also be used to receive subscription request information from the anchor session management function network element, where the subscription request information is used to subscribe data Network access identity change event.

其中，通信模块1010可以具体用于：检测到数据网络接入标识改变事件时，向锚点会话管理功能网元发送事件通知信息，事件通知信息携带第一标识。The communication module 1010 may be specifically configured to: when a data network access identifier change event is detected, send event notification information to the anchor session management function network element, where the event notification information carries the first identifier.

在一种可能的实现方式中，通信模块1010向锚点会话管理功能网元发送第一标识之前，还可以用于从锚点会话管理功能网元接收获取请求消息，获取请求消息用于请求获取用于接入数据网络的用户面功能网元的标识。In a possible implementation manner, before sending the first identifier to the anchor session management function network element, the communication module 1010 may also be used to receive an acquisition request message from the anchor session management function network element, and the acquisition request message is used to request acquisition The identifier of the user plane function network element used to access the data network.

在一种可能的实现方式中，通信模块1010向锚点会话管理功能网元发送第一标识之前，还可以用于从锚点会话管理功能网元接收至少一个数据网络接入标识，所述至少一个数据网络接入标识中包括第一标识。In a possible implementation manner, before sending the first identifier to the anchor session management function network element, the communication module 1010 may also be configured to receive at least one data network access identifier from the anchor session management function network element, the at least one data network access identifier. A data network access identifier includes the first identifier.

其中，通信模块1010可以具体用于：根据所述至少一个数据网络接入标识，向锚点会话管理功能网元发送第一标识。The communication module 1010 may be specifically configured to: send the first identifier to the anchor session management function network element according to the at least one data network access identifier.

通信模块1010从锚点会话管理功能网元接收获取请求消息的情况下，在一种可能的实现方式中，通信模块1010向锚点会话管理功能网元发送第一标识之前，还可以用于：向锚点会话管理功能网元发送获取请求消息的响应消息，响应消息中包括数据网络接入标识列表，数据网络接入标识列表中包括第一标识。When the communication module 1010 receives the acquisition request message from the anchor session management function network element, in a possible implementation manner, before the communication module 1010 sends the first identifier to the anchor session management function network element, it can also be used to: A response message of the acquisition request message is sent to the anchor session management function network element, where the response message includes a data network access identifier list, and the data network access identifier list includes a first identifier.

在一种可能的实现方式中，装置1000可以应用于所述中间会话管理功能网元的插入过程中执行，或，可以应用于中间会话管理功能网元插入过程完成后。In a possible implementation manner, the apparatus 1000 may be applied to execute during the insertion process of the intermediate session management function network element, or may be applied to the completion of the intermediate session management function network element insertion process.

指示业务分流的装置1000中，通信模块1010的一种示例为收发器，处理模块1020的一种示例为处理器。In the apparatus 1000 for indicating service offloading, an example of the communication module 1010 is a transceiver, and an example of the processing module 1020 is a processor.

通信模块1010为收发器时，该收发器可以包括接收器和发送器，该接收器用于指示接收的相关步骤，发送器用于执行发送的相关步骤。When the communication module 1010 is a transceiver, the transceiver may include a receiver and a transmitter, where the receiver is used to instruct relevant steps of receiving, and the transmitter is used to perform relevant steps of transmission.

通信模块1010为收发器，处理模块1020为处理器时，可选地，指示业务分流的装置1000中还可以包括存储器，该存储器用于存储程序代码。该存储器可以与处理器集成在一种。When the communication module 1010 is a transceiver, and the processing module 1020 is a processor, optionally, the apparatus 1000 for instructing service offloading may further include a memory, where the memory is used to store program codes. The memory can be integrated with the processor.

本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

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，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

在本申请所提供的几个实施例中，应该理解到，所揭露的系统、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，所述单元的划分，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，例如多个单元或组件可以结合或者可以集成到另一个系统，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 in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

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

另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

所述功能如果以软件功能单元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，本申请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)执行本申请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(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, removable hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (31)

1. a kind of method for indicating service distributing characterized by comprising

Anchor point conversation management functional network element receives first identifier from intermediate conversation management functional network element, and the first identifier is for markingKnow the user plane functions network element of the first data network of access；

The anchor point conversation management functional network element indicates the intermediate session management function network element insertion according to the first identifierThe user plane functions network element, the user plane functions network element are used for the first service distributing to first data network.

2. the method according to claim 1, wherein the anchor point conversation management functional network element is according to described firstMark indicates the intermediate session management function network element insertion for the use by the first service distributing to first data networkFamily face functional network element, comprising:

The anchor point conversation management functional network element indicates the intermediate session management according to the first identifier and control ruleFunctional network element is inserted into the user plane functions network element of first service distributing to first data network.

3. method according to claim 1 or 2, which is characterized in that the anchor point conversation management functional network element is according toFirst identifier indicates the intermediate session management function network element insertion for the use by the first service distributing to the first networkFamily face functional network element, comprising:

The anchor point conversation management functional network element determines that triggering the local of first business shunts according to the first identifier.

4. according to the method in any one of claims 1 to 3, which is characterized in that the anchor point conversation management functional network elementBefore receiving first identifier from intermediate conversation management functional network element, the method also includes:

The anchor point conversation management functional network element is sent to the intermediate session management function network element subscribes to solicited message, described to orderIt reads solicited message and changes event for subscribing to data network access Identifier；

Wherein, the anchor point conversation management functional network element receives first identifier from intermediate conversation management functional network element, comprising:

The anchor point conversation management functional network element receives the data network access mark from the intermediate session management function network elementKnow the event notification information of change event, the event notification information carries the first identifier.

5. method according to claim 1 to 4, which is characterized in that the anchor point conversation management functional network elementBefore receiving first identifier from intermediate conversation management functional network element, the method also includes:

The anchor point conversation management functional network element sends acquisition request message to the intermediate session management function network element, described to obtainRequest message is taken to be used to access the mark of the user plane functions network element of data network for request.

6. the method according to any one of claims 1 to 5, which is characterized in that the anchor point conversation management functional network elementBefore receiving first identifier from intermediate conversation management functional network element, the method also includes:

The anchor point conversation management functional network element sends an at least data network to the intermediate session management function network element and connectsInlet identity, wherein include the first identifier at least one data network access mark.

7. according to the method described in claim 6, it is characterized in that, the anchor point conversation management functional network element is to the intermediate meetingBefore talking about a management function network element transmission at least data network access Identifier, the method also includes:

The anchor point conversation management functional network element receives the acquisition request message from the intermediate session management function network elementResponse message includes that data network accesses identification list in the response message, wraps in the data network access identification listInclude the first identifier；

The anchor point conversation management functional network element accesses identification list and control rule according to the data network, determines instituteState at least one data network access mark.

8. method according to any one of claim 1 to 7, which is characterized in that the method is in the intermediate session pipeIt manages and is executed in the insertion process of functional network element, or, the method is completed in the intermediate session management function network element insertion processAfter execute.

9. a kind of method for indicating service distributing characterized by comprising

Intermediate session management function network element sends first identifier to anchor point conversation management functional network element, and the first identifier is for markingKnow the user plane functions network element of the first data network of access；

The intermediate session management function network element is inserted into the user face under the instruction of the anchor point conversation management functional network elementFunctional network element, the user plane functions network element are used for the first service distributing to first data network.

10. according to the method described in claim 9, it is characterized in that, the intermediate session management function network element is to anchor point sessionBefore management function network element sends first identifier, the method also includes:

The intermediate session management function network element is received from the anchor point conversation management functional network element subscribes to solicited message, described to orderIt reads solicited message and changes event for subscribing to data network access Identifier；

Wherein, the intermediate session management function network element sends first identifier to anchor point conversation management functional network element, comprising:

When the intermediate session management function network element detects data network access mark change event, Xiang Suoshu anchor point session pipeIt manages functional network element and sends event notification information, the event notification information carries the first identifier.

11. method according to claim 9 or 10, which is characterized in that the intermediate session management function network element is to anchor pointBefore conversation management functional network element sends first identifier, the method also includes:

The intermediate session management function network element receives acquisition request message from the anchor point conversation management functional network element, described to obtainRequest message is taken to be used to access the mark of the user plane functions network element of data network for request.

12. the method according to any one of claim 9 to 11, which is characterized in that the intermediate session management function netBefore member sends first identifier to anchor point conversation management functional network element, the method also includes:

The intermediate session management function network element receives at least one data network from the anchor point conversation management functional network element and connectsInlet identity, it includes the first identifier in mark that at least one described data network, which accesses,；

Wherein, the intermediate session management function network element sends first identifier to anchor point conversation management functional network element, comprising:

The intermediate session management function network element is according at least one data network access mark, Xiang Suoshu anchor point session pipeIt manages functional network element and sends the first identifier.

13. according to the method for claim 12, which is characterized in that the intermediate session management function network element is to anchor point sessionBefore management function network element sends first identifier, the method also includes:

The intermediate session management function network element sends the response of the acquisition request message to anchor point conversation management functional network elementMessage includes that data network accesses identification list in the response message, includes institute in the data network access identification listState first identifier.

14. the method according to any one of claim 9 to 13, which is characterized in that the method is in the intermediate sessionIt is executed in the insertion process of management function network element, or, the method is complete in the intermediate session management function network element insertion processAt rear execution.

15. a kind of device for indicating service distributing characterized by comprising

Communication module, for receiving first identifier from intermediate conversation management functional network element, the first identifier is for identifying accessThe user plane functions network element of first data network；

Processing module, for indicating that the intermediate session management function network element is inserted into the user face according to the first identifierFunctional network element, the user plane functions network element are used for the first service distributing to first data network.

16. device according to claim 15, which is characterized in that the processing module is specifically used for:

According to the first identifier and control rule, indicate the intermediate session management function network element insertion by first industryBusiness branches to the user plane functions network element of first data network.

17. device according to claim 15 or 16, which is characterized in that the processing module is specifically used for:

According to the first identifier, determine that triggering the local of first business shunts.

18. device described in any one of 5 to 17 according to claim 1, which is characterized in that the communication module is also used in instituteCommunication module is stated before intermediate conversation management functional network element reception first identifier, Xiang Suoshu intermediate session management function network element hairSubscription solicited message is sent, the subscription solicited message changes event for subscribing to data network access Identifier；

Wherein, the communication module is specifically used for receiving the data network access mark from the intermediate session management function network elementKnow the event notification information of change event, the event notification information carries the first identifier.

19. device described in any one of 5 to 18 according to claim 1, which is characterized in that the communication module is from intermediate sessionBefore management function network element receives first identifier, the communication module is also used to send to the intermediate session management function network elementAcquisition request message, the acquisition request message are used to access the mark of the user plane functions network element of data network for requestKnow.

20. device described in any one of 5 to 19 according to claim 1, which is characterized in that the communication module is from intermediate sessionBefore management function network element receives first identifier, it is also used to send an at least data to the intermediate session management function network elementNetwork access Identifier, wherein include the first identifier at least one data network access mark.

21. device according to claim 20, which is characterized in that the communication module is to the intermediate session management functionBefore network element sends an at least data network access Identifier, it is also used to:

The response message of the acquisition request message is received from the intermediate session management function network element, is wrapped in the response messageData network access identification list is included, includes the first identifier in the data network access identification list；

Identification list and control rule are accessed according to the data network, determines at least one data network access markKnow.

22. device described in any one of 5 to 21 according to claim 1, which is characterized in that described device is applied to the centreIn the insertion process of conversation management functional network element, it was inserted into or, described device is applied to the intermediate session management function network elementAfter the completion of journey.

23. a kind of device for indicating service distributing characterized by comprising

Communication module, for sending first identifier to anchor point conversation management functional network element, the first identifier is for identifying accessThe user plane functions network element of first data network；

Processing module, for being inserted into the user plane functions network element, institute under the instruction of the anchor point conversation management functional network elementUser plane functions network element is stated to be used for the first service distributing to first data network.

24. device according to claim 23, which is characterized in that the communication module is to anchor point conversation management functional network elementBefore sending first identifier, it is also used to receive from the anchor point conversation management functional network element and subscribes to solicited message, the subscription is askedInformation is asked to change event for subscribing to data network access Identifier；

Wherein, the communication module is specifically used for: when detecting data network access mark change event, Xiang Suoshu anchor point sessionManagement function network element sends event notification information, and the event notification information carries the first identifier.

25. the device according to claim 23 or 24, which is characterized in that the communication module is to anchor point conversation management functionalBefore network element sends first identifier, it is also used to receive acquisition request message from the anchor point conversation management functional network element, it is described to obtainRequest message is taken to be used to access the mark of the user plane functions network element of data network for request.

26. the device according to any one of claim 23 to 25, which is characterized in that the communication module is to anchor point sessionBefore management function network element sends first identifier, it is also used to receive at least one data from the anchor point conversation management functional network elementNetwork access Identifier, it includes the first identifier in mark that at least one described data network, which accesses,；

Wherein, the communication module is specifically used for: it is accessed and is identified according at least one described data network, Xiang Suoshu anchor point sessionManagement function network element sends the first identifier.

27. device according to claim 26, which is characterized in that the communication module is to anchor point conversation management functional network elementBefore sending first identifier, it is also used to: sends the response message of the acquisition request message to anchor point conversation management functional network element,Include that data network accesses identification list in the response message, includes described first in the data network access identification listMark.

28. the device according to any one of claim 23 to 27, which is characterized in that described device is applied to the centreIt is executed in the insertion process of conversation management functional network element, or, described device is inserted applied to the intermediate session management function network elementAfter the completion of entering process.

29. a kind of anchor point conversation management functional network element, which is characterized in that the anchor point conversation management functional network element is used for right of executionBenefit require any one of 1 to 14 described in method.

30. a kind of intermediate session management function network element, which is characterized in that the intermediate session management function network element is used for right of executionBenefit require any one of 15 to 28 described in method.

31. a kind of computer storage medium, which is characterized in that storage is used for communication device in the computer readable storage mediumThe program code of execution, said program code include the instruction for method described in any one of perform claim requirement 1 to 14.