WO2019033944A1

WO2019033944A1 - Information sending and operation executing method and device, and session management functional entity

Info

Publication number: WO2019033944A1
Application number: PCT/CN2018/098676
Authority: WO
Inventors: 周晓云; 周星月
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-08-14
Filing date: 2018-08-03
Publication date: 2019-02-21
Also published as: CN109413619B; CN109413619A

Abstract

Disclosed in the embodiments of the present invention are an information sending and operation executing method and device, and a session management functional entity. The information sending method comprises: after selecting, for user equipment (UE), a first user plane function (UPF) as a first anchor point of a protocol data unit (PDU) session, receiving traffic guide request indication information sent by a policy and control function (PCF), the traffic guide request indication information being defined by the PCF according to a traffic guide request, provided by an application being accessed by the UE, for requesting a network to perform traffic guide; and returning, to the application, first indication information for indicating a traffic guide mode used when the network performs traffic guide, the traffic guide mode including one of the following: an uplink classifier (UL CL) traffic guide mode and a multi-home traffic guide mode.

Description

信息发送、操作执行方法及装置、会话管理功能实体Information transmission, operation execution method and device, session management function entity

相关申请的交叉引用Cross-reference to related applications

本申请基于申请号为201710692546.1、申请日为2017年08月14日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此以引入方式并入本申请。The present application is filed on the basis of the Chinese Patent Application No. PCT Application No. PCT Application Serial No.

技术领域Technical field

本发明涉及通信领域，具体涉及一种信息发送、操作执行方法及装置、会话管理功能实体。The present invention relates to the field of communications, and in particular, to a method for transmitting information, performing an operation, and an apparatus, and a session management function entity.

背景技术Background technique

目前业界正在研究下一代无线通信***(5th-Generation，简称5G)，图1为相关技术中5G的架构示意图，主要功能实体的功能如下：。Currently, the industry is researching the next-generation wireless communication system (5th-Generation, 5G for short). Figure 1 is a schematic diagram of the 5G architecture in the related art. The functions of the main functional entities are as follows:

基站，负责终端接入网络的空口资源调度以及空口的连接管理；The base station is responsible for air interface resource scheduling of the terminal accessing the network and connection management of the air interface;

接入和移动性管理功能(Access and Mobility Management Function,简称AMF)主要负责接入认证、授权以及移动性管理。The Access and Mobility Management Function (AMF) is mainly responsible for access authentication, authorization, and mobility management.

会话管理功能(Session Management Function,简称SMF)主要负责会话管理、网络之间互联的协议(Internet Protocol，简称IP)地址分配。The Session Management Function (SMF) is mainly responsible for session management and Internet Protocol (IP) address allocation.

用户面功能(User Plane Function,简称UPF)为外部协议数据单元(Protocol Data Unit，简称PDU)会话的连接点，负责分组数据的路由、转发，以及对分组数据的策略执行等。The User Plane Function (UPF) is a connection point of a Protocol Data Unit (PDU) session, and is responsible for routing, forwarding, and policy execution of packet data.

策略控制功能(Policy Control Function，简称PCF)主要负责策略决策。The Policy Control Function (PCF) is mainly responsible for policy decisions.

为了能够缩短网络延迟，避免用户访问业务的路径迂回以及造成核心网的过负荷等，运营商总是希望用户能够就近访问业务。为了能够实现上述需求，在5G***中引入了如下两种网络架构。图2是相关技术中采用多归属(Multi-Homed)进行流量导向的架构示意图，如图2所示，网络在UE的用户面链路中引入了分叉点(Branching point，简称BP)并且分配一个新的锚点UPF，同时网络也会给UE分配另外一个IP地址。上行方向，分叉点将UE采用新的IP地址的数据转发给新的锚点UPF(UPF2)，而采用旧的IP地址的数据仍然转发给旧的锚点UPF(UPF1)。在下行方向，分叉点将来自UPF1和UPF2的数据汇聚后转发给基站。在实际部署时，分叉点可能和UPF2集成。In order to shorten the network delay, avoid the path of user access to the service, and overload the core network, the operator always wants the user to access the service nearby. In order to achieve the above requirements, the following two network architectures are introduced in the 5G system. 2 is a schematic diagram of a multi-homed traffic steering architecture in the related art. As shown in FIG. 2, the network introduces a branching point (BP) and allocates it in the user plane link of the UE. A new anchor UPF, and the network will also assign another IP address to the UE. In the upstream direction, the bifurcation point forwards the data of the UE with the new IP address to the new anchor UPF (UPF2), while the data with the old IP address is still forwarded to the old anchor UPF (UPF1). In the downstream direction, the bifurcation point aggregates data from UPF1 and UPF2 and forwards it to the base station. In actual deployment, the fork point may be integrated with UPF2.

图3是相关技术中采用上行链路分类器(Uplink Classifier，简称UL CL)方式进行流量导向的架构示意图，如图3所示，在该架构中，在UE的用户面链路中***了UL CL，UL CL可以将本地数据网络能够提供的业务直接分流出去。UL CL可以在PDU会话建立过程中引入，或是在PDU会话建立之后，在需要的时候再引入。为了能够让UL CL将业务正确的分流，UL CL上需要安装正确的分流过滤器。FIG. 3 is a schematic diagram of a traffic steering architecture using an uplink classifier (UL CL) in the related art, as shown in FIG. 3, in which a UL is inserted in a user plane link of a UE. CL, UL CL can directly offload the services that the local data network can provide. The UL CL can be introduced during the PDU session establishment process or after the PDU session is established, when needed. In order to allow the UL CL to properly divert the business, the correct shunt filter needs to be installed on the UL CL.

图4是相关技术中应用影响用户面路由的流程示意图，如图4所示，该方法包括：FIG. 4 is a schematic diagram of a process for affecting user plane routing in the related art. As shown in FIG. 4, the method includes:

步骤400：UE通过与UPF1建立的PDU会话(session)访问应用。Step 400: The UE accesses the application through a PDU session established with UPF1.

步骤401：应用功能(Applicant Function，简称AF)生成AF流量导向请求。请求的内容包括识别需要导向的流量信息(包括DNN和切片选择信息、AF业务标识(AF-Service-Identifier)、应用标识或流量过滤器信息)、N6接口的流量路由需求信息(路由文档标识)、流量导向的应用的位置信息(DNAI列表)、需要流量导向的UE的信息等。Step 401: An Applicant Function (AF) generates an AF traffic steering request. The content of the request includes identifying traffic information that needs to be directed (including DNN and slice selection information, AF-Service-Identifier, application identifier or traffic filter information), and traffic routing requirement information of the N6 interface (route document identifier). Location information (DNAI list) of traffic-oriented applications, information of UEs requiring traffic guidance, and the like.

步骤402a：若AF是不可信任的或AF的请求不是针对一个正在进行的PDU会话的，AF向NEF发送消息。Step 402a: If the AF is untrustworthy or the AF request is not for an ongoing PDU session, the AF sends a message to the NEF.

步骤402b：NEF对请求进行授权，并可能执行一些必要的映射，譬如根据AF-Service-Identifier获得DNN和切片选择信息、DNAI列表和路由文档标识等。NEF将请求发送给PCF。Step 402b: The NEF authorizes the request and may perform some necessary mapping, such as obtaining DNN and slice selection information, DNAI list, and routing document identifier according to the AF-Service-Identifier. The NEF sends the request to the PCF.

步骤402c：当AF的请求针对一个正在进行的PDU会话，那么AF直接向对应的PCF发送请求消息。Step 402c: When the AF request is for an ongoing PDU session, the AF directly sends a request message to the corresponding PCF.

步骤403：PCF向AF返回确认消息。Step 403: The PCF returns an acknowledgement message to the AF.

步骤404：PCF决定被AF请求影响的每一个已存在的PDU-CAN会话。针对每一个PDU-CAN会话，PCF通过PDU-CAN会话更新SMF上面的策略。SMF返回确认消息。Step 404: The PCF determines each of the existing PDU-CAN sessions affected by the AF request. For each PDU-CAN session, the PCF updates the policy on the SMF through the PDU-CAN session. The SMF returns a confirmation message.

步骤405：SMF根据PCF新下发的策略，执行相应的操作重新配置PDU会话的用户面：1)在用户面路径***UL CL或BP；2)当使用Multi-homing时，为UE分配新的地址前缀3)更新在目标DNAI上的UPF的流量导向规则。Step 405: The SMF performs a corresponding operation to reconfigure the user plane of the PDU session according to the newly issued policy of the PCF: 1) inserting UL CL or BP in the user plane path; 2) assigning a new UE to the UE when using Multi-homing Address Prefix 3) Updates the traffic steering rules for UPF on the target DNAI.

步骤406：SMF向AF通知应用执行结果。该通知可能通过NEF转发给AF。Step 406: The SMF notifies the AF of the application execution result. This notification may be forwarded to the AF via NEF.

在上述流程中，AF在发送流量导向请求时，并不知道SMF会选择什么模式(即是UL CL还是BP),但是由于在不同模式下，应用层提供向网络提供的信息是不同的，而且应用层与UE需要交互以及AF与网络的交互的信息和先后顺序也是不同的。从而根据现有技术，若AF在不知道SMF选择的模式的情况下，向网络提供相同的信息会无法实现流量导向。In the above process, the AF does not know what mode the SMF will select when transmitting the traffic steering request (ie, UL CL or BP), but because the application layer provides different information to the network in different modes, and The information and sequence in which the application layer needs to interact with the UE and the interaction between the AF and the network is also different. Therefore, according to the prior art, if the AF provides the same information to the network without knowing the mode selected by the SMF, the traffic guidance cannot be achieved.

针对相关技术中的上述技术问题，目前尚未提出有效的解决方案。In view of the above technical problems in the related art, an effective solution has not yet been proposed.

发明内容Summary of the invention

本发明实施例提供了一种信息发送、操作执行方法及装置、会话管理功能实体，以至少解决相关技术中应用层由于无法获得网络使用的流量导向方式所导致的无法实现流量导向的问题。The embodiments of the present invention provide a method for transmitting information, performing operations, and a session, and a session management function entity, so as to solve at least the problem that the application layer cannot implement traffic guidance due to the inability to obtain the traffic-oriented manner of the network.

根据本发明的一个实施例，提供了一种信息发送方法，包括：为用户设备UE选择第一UPF作为PDU会话的第一锚点之后，接收策略和控制功能PCF发送的流量导向请求指示信息，其中，流量导向请求指示信息为PCF根据UE正在访问的应用提供的用于请求网络进行流量导向的流量导向请求制定的；向应用返回用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，流量导向方式包括以下之一：上行链路分类器UL CL流量导向方式，多归属流量导向方式。According to an embodiment of the present invention, an information sending method is provided, including: after the user equipment UE selects the first UPF as the first anchor point of the PDU session, and receives the traffic steering request indication information sent by the policy and control function PCF, The traffic directing request indication information is determined by the PCF according to the traffic steering request for requesting the network to perform traffic steering provided by the application that the UE is accessing, and the first of the traffic guiding manner used for indicating the traffic steering of the network is returned to the application. The indication information, the traffic steering mode includes one of the following: an uplink classifier UL CL traffic steering mode, and a multi-homing traffic steering mode.

根据本发明的一个实施例，提供了一种操作执行方法，包括：发送用于请求网络进行流量导向的流量导向请求；接收网络返回的用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，其中，流量导向方式包括以下之一：上行链路分类器UL CL流量导向方式，多归属流量导向方式；根据第一指示信息指示的流量导向方式执行应用操作。According to an embodiment of the present invention, an operation execution method is provided, including: sending a traffic steering request for requesting a network to perform traffic steering; and receiving a traffic directed manner used by the network to indicate that the network performs traffic steering. An indication information, wherein the traffic steering mode comprises one of the following: an uplink classifier UL CL traffic steering mode, and a multi-homing traffic steering mode; and performing an application operation according to the traffic steering mode indicated by the first indication information.

根据本发明的一个实施例，提供了一种信息发送装置，包括：第一接收模块，用于为用户设备UE选择第一用户面功能UPF作为协议数据单元PDU会话的第一锚点之后，接收策略和控制功能PCF发送的流量导向请求指示信息，其中，流量导向请求指示信息为PCF根据UE正在访问的应用提供的用于请求网络进行流量导向的流量导向请求制定的；第一发送模块，用于向应用返回用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，流量导向方式包括以下之一：上行链路分类器UL CL流量导向方式，多归属流量导向方式。According to an embodiment of the present invention, an information sending apparatus is provided, including: a first receiving module, configured to: after receiving, by a user equipment UE, a first user plane function UPF as a first anchor point of a protocol data unit PDU session, receiving The traffic directing request indication information sent by the PCF is configured by the PCF according to the traffic steering request for requesting the network to perform traffic steering according to the application that the UE is accessing; the first sending module uses The first indication information of the traffic steering mode used to indicate the traffic steering of the network is returned to the application, and the traffic steering mode includes one of the following: an uplink classifier UL CL traffic steering mode, and a multi-homing traffic steering mode.

根据本发明的一个实施例，提供了一种操作执行装置，包括：发送模块，用于发送用于请求网络进行流量导向的流量导向请求；接收模块，用于接收网络返回的用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，其中，流量导向方式包括以下之一：上行链路分类器UL CL流量导向方式，多归属流量导向方式；操作模块，用于根据第一指示信息指示的流量导向方式执行应用操作。According to an embodiment of the present invention, an operation execution apparatus is provided, including: a sending module, configured to send a traffic steering request for requesting a network to perform traffic steering; and a receiving module, configured to receive, by the network, the network to perform The first indication information of the traffic-oriented mode used in the traffic-oriented manner, where the traffic-oriented manner includes one of the following: an uplink classifier UL CL traffic steering mode, a multi-homed traffic steering mode, and an operation module, configured to perform according to the first indication The traffic directed mode indicated by the information performs an application operation.

根据本发明的一个实施例，提供了一种会话管理功能实体，包括：处理器，处理器用于运行程序，其中，程序运行时执行上述任一项的信息发送方法。According to an embodiment of the present invention, a session management function entity is provided, including: a processor, the processor is configured to run a program, and the program is configured to execute the information sending method of any of the above.

根据本发明的一个实施例，提供了一种应用层设备，包括：处理器，处理器用于运行程序，其中，程序运行时执行上述任一项的操作执行方法。According to an embodiment of the present invention, an application layer device is provided, including: a processor, the processor is configured to execute a program, wherein the program execution method performs the operation execution method of any of the above.

根据本发明的一个实施例，提供了一种存储介质，存储介质包括存储的程序，其中，程序运行时执行上述任一项所述的信息发送方法；或者，所述程序运行时执行上述任一项所述的操作执行方法。According to an embodiment of the present invention, a storage medium is provided, the storage medium including a stored program, wherein the program is executed to execute the information transmitting method according to any one of the above items; or the program is executed to execute any of the above The operation execution method described in the item.

根据本发明的一个实施例，提供了一种处理器，处理器用于运行程序，其中，程序运行时执行上述任一项所述的信息发送方法，或者，所述程序运行时执行上述任一项所述的操作执行方法。According to an embodiment of the present invention, there is provided a processor, wherein a processor is configured to execute a program, wherein the program is executed to execute the information transmitting method according to any one of the above items, or the program is executed to execute any of the above The operation execution method described.

通过本发明实施例的技术方案，由于在接收到PCF发送的流量导向请求指示信息之后，向应用返回用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，使得应用可以获取到网络使用的流量导向方向，进而可以实现流量导向，因此，可以解决应用层由于无法获得网络使用的流量导向方式所导致的无法实现流量导向的问题。According to the technical solution of the embodiment of the present invention, after receiving the traffic directing request indication information sent by the PCF, the first indication information indicating the traffic guiding manner used when the network performs traffic steering is returned to the application, so that the application can obtain the The traffic direction used by the network can be used to implement traffic steering. Therefore, it is possible to solve the problem that the application layer cannot achieve traffic steering due to the inability to obtain the traffic steering mode used by the network.

附图说明DRAWINGS

此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

图1为相关技术中5G的架构示意图；1 is a schematic diagram of a 5G architecture in the related art;

图2是相关技术中采用多归属(Multi-Homed)进行流量导向的架构示意图；2 is a schematic diagram of a structure of traffic steering using Multi-Homed in the related art;

图3是相关技术中采用上行链路分类器(Uplink Classifier，简称UL CL)方式进行流量导向的架构示意图；FIG. 3 is a schematic diagram of an architecture for performing traffic steering by using an Uplink Classifier (UL CL) method in the related art;

图4是相关技术中应用影响用户面路由的流程示意图；4 is a schematic diagram of a process of affecting user plane routing in the related art;

图5是根据本发明实施例的信息发送方法的流程图；FIG. 5 is a flowchart of a method for transmitting information according to an embodiment of the present invention; FIG.

图6是根据本发明实施例的操作执行方法的流程图；6 is a flowchart of an operation performing method according to an embodiment of the present invention;

图7是根据本发明实施例的信息发送装置的结构框图；FIG. 7 is a structural block diagram of an information transmitting apparatus according to an embodiment of the present invention; FIG.

图8是根据本发明实施例的操作执行装置的结构框图；FIG. 8 is a block diagram showing the structure of an operation performing apparatus according to an embodiment of the present invention; FIG.

图9是根据本发明可选实施例一提供的为当SMF采用UL CL模式进行流量导向时，应用层与网络的交互流程示意图；FIG. 9 is a schematic diagram of an interaction process between an application layer and a network when the SMF adopts the UL CL mode for traffic steering according to an alternative embodiment of the present invention;

图10是根据本发明可选实施例二提供的为当SMF采用Multi-homing模式进行流量导向时，应用层与网络的交互流程示意图。FIG. 10 is a schematic diagram of an interaction process between an application layer and a network when the SMF adopts the Multi-homing mode for traffic steering according to an alternative embodiment of the present invention.

具体实施方式Detailed ways

下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。It is to be understood that the terms "first", "second", and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

在本实施例中提供了一种运行于图2或图3网络架构的信息发送方法，图5是根据本发明实施例的信息发送方法的流程图，如图5所示，该流程包括如下步骤：In this embodiment, a method for transmitting information in the network architecture of FIG. 2 or FIG. 3 is provided. FIG. 5 is a flowchart of a method for sending information according to an embodiment of the present invention. As shown in FIG. 5, the process includes the following steps. :

步骤S502，为UE选择第一UPF作为PDU会话的第一锚点之后，接收PCF发送的流量导向请求指示信息，其中，流量导向请求指示信息为PCF根据UE正在访问的应用提供的用于请求网络进行流量导向的流量导向请求制定的；Step S502, after the first UPF is selected as the first anchor point of the PDU session, the UE receives the traffic steering request indication information sent by the PCF, where the traffic steering request indication information is used by the PCF to request the network according to the application that the UE is accessing. Conducting traffic-oriented traffic guidance requests;

步骤S504，向应用返回用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，流量导向方式包括以下之一：UL CL流量导向方式，多归属流量导向方式。Step S504, returning, to the application, first indication information for indicating a traffic guidance mode used when the network performs traffic steering. The traffic guidance mode includes one of the following: a UL CL traffic guidance mode and a multi-homed traffic guidance mode.

通过上述步骤，由于在接收到PCF发送的流量导向请求指示信息之后，向应用返回用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，使得应用可以获取到网络使用的流量导向方向，进而可以实现流量导向，因此，可以解决应用层由于无法获得网络使用的流量导向方式所导致的无法实现流量导向的问题。After the foregoing step, after receiving the traffic steering request indication information sent by the PCF, returning the first indication information used by the application to indicate the traffic steering mode used by the network to perform traffic steering, so that the application can obtain the traffic steering used by the network. The direction, in turn, can achieve traffic steering. Therefore, it is possible to solve the problem that the application layer cannot achieve traffic steering due to the inability to obtain the traffic-oriented manner of the network.

需要说明的是，上述第一指示信息可以是显示指示信息，也可以是隐式指示信息，因而，上述第一指示信息可以包括以下至少信息：用于指示流量导向方式为UL CL流量导向方式还是多归属流量导向方式的显式指示信息，是否发送第一互联网协议第6版IPv6前缀信息；其中，在发送第一IPv6前缀信息的情况下，第一指示信息用于指示使用的流量导向方式为多归属流量导向方式，在未发送第一IPv6前缀信息的情况下，第一指示信息用于指示使用的流量导向方式为UL CL流量导向方式。是否发送第一IPv6前缀信息实际上是一种隐式指示信息。It should be noted that the foregoing first indication information may be display indication information or implicit indication information. Therefore, the first indication information may include at least information for indicating whether the traffic guidance mode is a UL CL traffic guidance mode or The explicit indication information of the multi-homing traffic-directed mode, whether to send the IPv6 prefix information of the first Internet Protocol version 6; wherein, when the first IPv6 prefix information is sent, the first indication information is used to indicate that the traffic-oriented mode used is In the case of the multi-homing traffic-directed mode, the first indication information is used to indicate that the used traffic-oriented mode is the UL CL traffic-directed mode. Whether to send the first IPv6 prefix information is actually an implicit indication information.

需要说明的是，上述第一IPv6前缀信息可以是为用户设备新分配的IPv6前缀信息，但并不限于此。It should be noted that the foregoing first IPv6 prefix information may be newly allocated IPv6 prefix information for the user equipment, but is not limited thereto.

在本发明的一个实施例中，在第一指示信息用于指示使用的流量导向方式为UL CL流量导向方式的情况下，在上述步骤S504之后，上述方法还包括：接收PCF实体发送的第一策略；其中，第一策略为PCF实体根据应用在完成应用重选后提供的流描述信息制定的策略；根据第一策略对用户设备访问应用的路径进行切换。In an embodiment of the present invention, after the first indication information is used to indicate that the used traffic steering mode is the UL CL traffic steering mode, after the foregoing step S504, the method further includes: receiving, by the PCF entity, the first The policy is a policy that is defined by the PCF entity according to the flow description information provided by the application after the application reselection is completed; and the path of the user equipment accessing the application is switched according to the first policy.

需要说明的是，根据第一策略对用户设备访问应用的路径进行切换可以表现为：根据第一策略制定第一规则；将第一规则发送给UL CL；其中，第一规则用于指示UL CL将接收到的UE访问应用的上行数据发送给作为PDU会话的第二锚点的第二UPF。It should be noted that the switching of the path of the user equipment access application according to the first policy may be performed by: formulating a first rule according to the first policy; and transmitting the first rule to the UL CL; wherein the first rule is used to indicate the UL CL The received uplink data of the UE accessing application is sent to the second UPF that is the second anchor point of the PDU session.

需要说明的是，上述第二锚点的第二UPF为决定采用UL CL流量导向方式进行流量导向时选择的一个与第一UPF不同的新的UPF。It should be noted that the second UPF of the second anchor point is a new UPF different from the first UPF selected when the flow guidance is determined by the UL CL flow guiding method.

在第一指示信息用于指示使用的流量导向方式为UL CL流量导向方式的情况下，先进行应用重选，在完成应用重选后，将重选后的流描述信息提供给核心网，核心网再对UE对应用的路径进行切换(即用户面优化)。When the first indication information is used to indicate that the used traffic-oriented mode is the UL CL traffic-oriented mode, the application re-selection is performed first, and after the application re-selection is completed, the re-selected flow description information is provided to the core network, and the core The network then switches the path of the application to the UE (ie, user plane optimization).

在本发明的一个实施例中，在第一指示信息用于指示使用的流量导向方式为多归属流量导向方式的情况下，在上述步骤S504之后，上述方法还可以包括：接收PCF实体发送的第二策略；其中，第二策略为PCF实体根据应用向UE提供的服务将会被重定向到的应用服务器的地址信息制定的策略；根据第二策略对用户设备访问应用的路径进行切换。In an embodiment of the present invention, in the case that the first indication information is used to indicate that the used traffic-directed mode is the multi-homing traffic-directed mode, after the step S504, the method may further include: receiving, by the PCF entity, The second policy is a policy formulated by the PCF entity according to the address information of the application server to which the service provided by the application to the UE is to be redirected; and the path of the user device accessing the application is switched according to the second policy.

需要说明的是，根据第二策略对用户设备访问应用的路径进行切换可以表现为：根据第二策略制定第二规则；将第二规则发送给分叉点(BP)，其中第二规则用于指示BP将接收到的UE访问应用的上行数据发送给作为PDU会话的第三锚点的第三UPF；通过第三UPF向UE发送路由通告消息，其中，路由通告消息中携带第一IPv6前缀信息和路由选项信息，路由选项信息中携带应用向UE提供的服务将会被重定向到的应用服务器的地址信息。It should be noted that the switching of the path of the user equipment access application according to the second policy may be performed by: formulating a second rule according to the second policy; and sending the second rule to a bifurcation point (BP), where the second rule is used for Instructing the BP to send the received uplink data of the UE accessing the application to the third UPF that is the third anchor point of the PDU session; sending a route advertisement message to the UE by using the third UPF, where the route advertisement message carries the first IPv6 prefix information And routing option information, the routing option information carries the address information of the application server to which the service provided by the application to the UE is to be redirected.

需要说明的是，上述第三UPF为决定采用多归属流量导向方式进行流量导向时选择的一个与第一UPF不同的新的UPF。It should be noted that the third UPF is a new UPF that is different from the first UPF selected when the traffic guidance is determined by using the multi-homing traffic guidance method.

需要说明的是，根据第二策略对用户设备访问应用的路径进行切换之后，上述方法还可以包括：向应用层发送通知信息，其中，通知信息用于通知应用UE访问应用的路径切换完成。It should be noted that after the path of the user equipment accessing the application is switched according to the second policy, the method may further include: sending the notification information to the application layer, where the notification information is used to notify the application UE that the path switching of the application is completed.

需要说明的是，在第一指示信息用于指示使用的流量导向方式为多归属流量导向方式的情况下，先对UE访问应用的路径进行切换(用户面优化)完成后，应用层再与UE交互完成应用层的重选。It should be noted that, when the first indication information is used to indicate that the used traffic steering mode is the multi-homed traffic steering mode, after the UE accesses the application path to be switched (user plane optimization), the application layer re-applies with the UE. The interaction completes the reselection of the application layer.

可选地，上述步骤的执行主体可以为核心网设备，具体的，可以为会话管理功能SMF实体等，但不限于此。Optionally, the execution entity of the foregoing step may be a core network device, and specifically, may be a session management function SMF entity, etc., but is not limited thereto.

通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分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(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

在本实施例中提供了一种运行于图2或图3网络架构的操作执行方法，图6是根据本发明实施例的操作执行方法的流程图，如图6所示，该流程包括如下步骤：In this embodiment, an operation execution method running in the network architecture of FIG. 2 or FIG. 3 is provided. FIG. 6 is a flowchart of an operation execution method according to an embodiment of the present invention. As shown in FIG. 6, the flow includes the following steps. :

步骤S602，发送用于请求网络进行流量导向的流量导向请求；Step S602, sending a traffic directing request for requesting the network to perform traffic steering;

步骤S604，接收网络返回的用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，其中，流量导向方式包括以下之一：UL CL流量导向方式，多归属流量导向方式；Step S604, the first indication information that is used by the network to indicate the traffic-oriented mode used by the network to perform the traffic guidance, wherein the traffic guidance mode includes one of the following: a UL CL traffic guidance mode, and a multi-homed traffic guidance mode;

步骤S606，根据第一指示信息指示的流量导向方式执行应用操作。Step S606, performing an application operation according to the traffic guidance manner indicated by the first indication information.

通过上述步骤，由于可以接收网络返回的用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，使得应用可以获取到网络使用的流量导向方式，进而可以实现流量导向，因此，可以解决应用层由于无法获得网络使用的流量导向方式所导致的无法实现流量导向的问题。Through the foregoing steps, the first indication information that is used by the network to indicate the traffic-oriented mode used by the network for traffic guidance can be received, so that the application can obtain the traffic-oriented manner used by the network, thereby implementing traffic steering, and thus, Solving the problem that the application layer cannot achieve traffic steering due to the inability to obtain the traffic-oriented way of using the network.

需要说明的是，上述第一指示信息可以包括以下至少之一信息：用于指示使用的流量导向方式为UL CL流量导向方式还是多归属流量导向方式的显式指示信息，是否接收到第一IPv6前缀信息；其中，在接收到第一IPv6前缀信息的情况下，第一指示信息用于指示使用的流量导向方式为多归属流量导向方式，在未接收到第一IPv6前缀信息的情况下，第一指示信息用于指示使用的流量导向方式为UL CL流量导向方式。It should be noted that the foregoing first indication information may include at least one of the following information: an explicit indication information indicating whether the used traffic steering mode is a UL CL traffic steering mode or a multi-homing traffic steering mode, and whether the first IPv6 is received. a prefix information, where the first indication information is used to indicate that the used traffic steering mode is a multi-homed traffic-directed mode, and the first IPv6 prefix information is not received, in the case that the first IPv6 prefix information is received, An indication message is used to indicate that the traffic steering mode used is the UL CL traffic steering mode.

在本发明的一个实施例中，在上述第一指示信息用于指示使用的流量导向方式为UL CL流量导向方式的情况下，上述步骤S606可以表现为：执行应用重选操作；将重选后的流描述信息发送给PCF；其中，流描述信息用于网络对UE访问应用的路径进行切换。In an embodiment of the present invention, in the case that the first indication information is used to indicate that the used traffic steering mode is the UL CL traffic guiding mode, the foregoing step S606 may be performed by: performing an application reselection operation; The flow description information is sent to the PCF; wherein the flow description information is used by the network to switch the path of the UE accessing the application.

需要说明的是，上述重选后的流描述信息包括UE的访问已被重定向到的应用服务器的地址信息。It should be noted that the stream description information after the reselection includes the address information of the application server to which the access of the UE has been redirected.

在本发明的一个实施例中，在第一指示信息用于指示使用的流量导向方式为多归属流量导向方式的情况下，上述步骤S606可以表现为：向网络发送应用向UE提供的服务将会被重定向到新的应用服务器的地址信息；接收网络提供的通知信息，上述通知消息可以用于通知应用UE访问应用的路径切换完成；将应用向UE提供的服务重定向到新的应用服务器的地址。In an embodiment of the present invention, in the case that the first indication information is used to indicate that the used traffic steering mode is the multi-homed traffic steering mode, the foregoing step S606 may be performed by: sending the service provided by the application to the UE to the network. The address information is redirected to the new application server; the notification information provided by the network is received, and the notification message may be used to notify the application UE that the path switching of the application is completed; and the service provided by the application to the UE is redirected to the new application server. address.

需要说明的是，上述步骤的执行主体可以是应用层，具体的，可以是AF实体，但并不限于此。It should be noted that the execution entity of the foregoing step may be an application layer, and specifically, may be an AF entity, but is not limited thereto.

在本实施例中还提供了一种信息发送装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语 “模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。In the embodiment, an information transmitting apparatus is further provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and the detailed description thereof has been omitted. As used hereinafter, the term "module" may implement a combination of software and/or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

图7是根据本发明实施例的信息发送装置的结构框图，如图7所示，该装置包括：FIG. 7 is a structural block diagram of an information transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 7, the apparatus includes:

第一接收模块72，配置为为UE选择第一UPF作为PDU会话的第一锚点之后，接收PCF发送的流量导向请求指示信息，其中，流量导向请求指示信息为PCF根据UE正在访问的应用提供的用于请求网络进行流量导向的流量导向请求制定的；The first receiving module 72 is configured to receive, after the UE selects the first UPF as the first anchor point of the PDU session, the traffic steering request indication information sent by the PCF, where the traffic steering request indication information is provided by the PCF according to the application that the UE is accessing. Used to request the network for traffic-oriented traffic-oriented request formulation;

第一发送模块74，与上述第一接收模块72连接，配置为向应用返回用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，流量导向方式包括以下之一：UL CL流量导向方式，多归属流量导向方式。The first sending module 74 is connected to the first receiving module 72, and is configured to return, to the application, first indication information for indicating a traffic guiding manner used when the network performs traffic steering. The traffic guiding manner includes one of the following: UL CL traffic. Guided approach, multi-homed traffic-oriented approach.

通过上述装置，由于在上述第一接收模块72接收到PCF发送的流量导向请求指示信息之后，上述第一接收模块72向应用返回用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，使得应用可以获取到网络使用的流量导向方向，进而可以实现流量导向，因此，可以解决应用层由于无法获得网络使用的流量导向方式所导致的无法实现流量导向的问题。After the first receiving module 72 receives the traffic steering request indication information sent by the PCF, the first receiving module 72 returns a first indication for indicating the traffic steering mode used by the network for traffic steering. The information enables the application to obtain the traffic-oriented direction of the network, thereby enabling traffic steering. Therefore, the problem that the application layer cannot achieve traffic steering due to the inability to obtain the traffic-oriented manner of the network can be solved.

需要说明的是，上述第一指示信息可以包括以下至少之一信息：用于指示使用的流量导向方式为UL CL流量导向方式还是多归属流量导向方式的显式指示信息，是否发送第一IPv6前缀信息；其中，在发送第一IPv6前缀信息的情况下，第一指示信息用于指示使用的流量导向方式为多归属流量导向方式，在未发送第一IPv6前缀信息的情况下，第一指示信息用于指示使用的流量导向方式为UL CL流量导向方式。It should be noted that the foregoing first indication information may include at least one of the following information: an explicit indication information indicating whether the used traffic directing mode is a UL CL traffic steering mode or a multi-homing traffic steering mode, and whether the first IPv6 prefix is sent. The first indication information is used to indicate that the used traffic-directed mode is the multi-homed traffic-directed mode. If the first IPv6 prefix information is not sent, the first indication information is sent. The traffic steering mode used to indicate the usage is the UL CL traffic steering mode.

需要说明的是，上述第一IPv6前缀信息可以是为用户设备新分配的 IPv6前缀信息，但并不限于此。It should be noted that the foregoing first IPv6 prefix information may be newly allocated IPv6 prefix information for the user equipment, but is not limited thereto.

在本发明的一个实施例中，在上述第一指示信息用于指示使用的流量导向方式为UL CL流量导向方式的情况下，上述装置还可以包括：第二接收模块，与上述第一发送模块74连接，配置为接收PCF实体发送的第一策略；其中，第一策略为PCF实体根据应用在完成应用重选后提供的流描述信息制定的策略；第一切换模块，与上述第二接收模块连接，配置为根据第一策略对用户设备访问应用的路径进行切换。In an embodiment of the present invention, in the case that the first indication information is used to indicate that the used traffic guidance mode is the UL CL traffic guidance mode, the device may further include: a second receiving module, and the first sending module The first connection is configured to receive the first policy sent by the PCF entity, where the first policy is a policy that is determined by the PCF entity according to the flow description information provided by the application after the application reselection is completed; the first switching module, and the second receiving module The connection is configured to switch the path of the user equipment access application according to the first policy.

需要说明的是，第一切换模块包括：第一生成单元，配置为根据第一策略制定第一规则；第一发送单元，与上述第一生成单元连接，配置为将第一规则发送给UL CL；其中，第一规则用于指示UL CL将接收到的UE访问应用的上行数据发送给作为PDU会话的第二锚点的第二UPF。It is to be noted that the first switching module includes: a first generating unit configured to formulate a first rule according to the first policy; the first sending unit is connected to the first generating unit, configured to send the first rule to the UL CL The first rule is used to instruct the UL CL to send the received uplink data of the UE access application to the second UPF that is the second anchor point of the PDU session.

在本发明的一个实施例中，在上述第一指示信息用于指示使用的流量导向方式为多归属流量导向方式的情况下，上述装置还可以包括：第三接收模块，与上述第一发送模块74连接，配置为接收PCF实体发送的第二策略；其中，第二策略为PCF实体根据应用提供的UE的访问将会被重定向到的应用服务器的地址信息制定的策略；第二切换模块，与上述第三接收模块连接，配置为根据第二策略对用户设备访问应用的路径进行切换。In an embodiment of the present invention, in the case that the first indication information is used to indicate that the traffic-directed mode used is the multi-homing traffic guidance mode, the device may further include: a third receiving module, and the first sending module. The connection is configured to receive the second policy sent by the PCF entity, where the second policy is a policy formulated by the PCF entity according to the address information of the application server to which the UE provided by the application is to be redirected; the second switching module, And connecting to the third receiving module, configured to switch the path of the user equipment access application according to the second policy.

需要说明的是，上述第二切换模块可以包括：第二生成单元，配置为根据第二策略制定第二规则；第二发送单元，配置为将第二规则发送给BP，其中第二规则用于指示BP将接收到的UE访问应用的上行数据发送给作为PDU会话的第三锚点的第三UPF；第三发送单元，与上述第二发生单元连接，配置为通过第三UPF向用户设备发送路由通告消息，其中，路由通告消息中携带为第一IPv6前缀信息和路由选项信息，路由选项信息中携带应用提供的UE的访问将会被重定向到的应用服务器的地址信息。It should be noted that the foregoing second switching module may include: a second generating unit configured to formulate a second rule according to the second policy; and a second sending unit configured to send the second rule to the BP, where the second rule is configured to use Instructing the BP to send the received uplink data of the UE accessing the application to the third UPF that is the third anchor point of the PDU session; the third sending unit is connected to the second generating unit, and configured to send the third UPF to the user equipment. The route advertisement message carries the first IPv6 prefix information and the route option information, and the route option information carries the address information of the application server to which the access provided by the application is to be redirected.

需要说明的是，上述第三UPF为决定采用多归属流量导向方式进行流量导向时选择的一个与第一UPF不同的新的UPF。It should be noted that the third UPF is a new UPF different from the first UPF selected when the traffic guidance is determined by the multi-homing traffic steering method.

在本发明的一个实施例中，上述装置还可以包括：第二发送模块，与上述第二切换模块连接，配置为向应用层发送通知信息，其中，通知信息用于通知应用层用户设备访问应用的路径切换完成。In an embodiment of the present invention, the apparatus may further include: a second sending module, connected to the second switching module, configured to send notification information to the application layer, where the notification information is used to notify the application layer user equipment to access the application The path switch is completed.

需要说明的是：上述实施例提供的信息发送装置在进行信息发送时，仅以上述各程序模块的划分进行举例说明，实际应用中，可以根据需要而将上述处理分配由不同的程序模块完成，即将装置的内部结构划分成不同的程序模块，以完成以上描述的全部或者部分处理。另外，上述实施例提供的信息发送装置与信息发送方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。It should be noted that, when the information transmitting apparatus provided in the foregoing embodiment performs information transmission, only the division of each of the foregoing program modules is illustrated. In actual applications, the processing allocation may be completed by different program modules as needed. The internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the information transmitting apparatus and the information transmitting method embodiment provided by the foregoing embodiments are in the same concept, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.

需要说明的是，上述装置可以位于核心网设备中，具体的，可以位于SMF实体等，但不限于此。It should be noted that the foregoing device may be located in a core network device, and may be located in an SMF entity or the like, but is not limited thereto.

本发明实施例还提供了一种SMF实体，包括：处理器，该处理器用于运行程序，其中，该程序运行时执行前述实施例中任一项所述的信息发送方法。The embodiment of the present invention further provides an SMF entity, including: a processor, configured to run a program, where the program is executed to execute the information sending method according to any one of the foregoing embodiments.

需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination. The forms are located in different processors.

在本实施例中还提供了一种操作执行装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。In the embodiment, an operation execution device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and the detailed description thereof has been omitted. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

图8是根据本发明实施例的操作执行装置的结构框图，如图8所示，该装置包括：FIG. 8 is a structural block diagram of an operation performing apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus includes:

发送模块82，配置为发送用于请求网络进行流量导向的流量导向请求；The sending module 82 is configured to send a traffic steering request for requesting the network to perform traffic steering;

接收模块84，与上述发送模块82连接，配置为接收网络返回的用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，其中，流量导向方式包括以下之一：UL CL流量导向方式，多归属流量导向方式；The receiving module 84 is connected to the sending module 82, and configured to receive the first indication information returned by the network for indicating the traffic steering mode used by the network for traffic steering. The traffic guiding mode includes one of the following: UL CL traffic steering Mode, multi-homing traffic-oriented mode;

操作模块86，与上述接收模块84连接，配置为根据第一指示信息指示的流量导向方式执行应用操作。The operation module 86 is connected to the receiving module 84, and configured to perform an application operation according to the traffic guidance manner indicated by the first indication information.

通过上述装置，由于可以通过接收模块84接收网络返回的用于指示网络进行流量导向时使用的流量导向方式的第一指示信息，使得应用可以获取到网络使用的流量导向方式，进而可以实现流量导向，因此，可以解决应用层由于无法获得网络使用的流量导向方式所导致的无法实现流量导向的问题。The above-mentioned device can receive the first indication information of the traffic guidance mode used by the network to indicate the flow direction of the network, and the application can obtain the traffic guidance mode used by the network, thereby implementing the traffic guidance. Therefore, it is possible to solve the problem that the application layer cannot achieve traffic steering due to the inability to obtain the traffic-oriented manner of network usage.

在本发明的一个实施例中，在第一指示信息用于指示使用的流量导向方式为UL CL流量导向方式的情况下，上述操作模块86包括：第一重选单元，配置为执行应用重选操作；第一发送单元，与上述第一重选单元连接，配置为将重选后的流描述信息发送给PCF；其中，流描述信息用于网络对UE访问应用的路径进行切换。In an embodiment of the present invention, in the case that the first indication information is used to indicate that the used traffic steering mode is the UL CL traffic steering mode, the operation module 86 includes: a first reselecting unit configured to perform application reselection The first sending unit is connected to the first reselecting unit, and is configured to send the reselected flow description information to the PCF. The flow description information is used by the network to switch the path of the UE accessing the application.

可选地，在第一指示信息用于指示使用的流量导向方式为多归属流量导向方式的情况下，操作模块包括：第一重选单元，配置为在网络对用户设备访问应用的路径进行切换完成后，执行应用重选操作。Optionally, in the case that the first indication information is used to indicate that the used traffic-oriented mode is the multi-homed traffic-directed mode, the operation module includes: a first re-selection unit configured to switch the path of the user equipment accessing the application in the network When finished, perform an application reselection.

在本发明的一个实施例中，在第一指示信息用于指示使用的流量导向方式为多归属流量导向方式的情况下，上述操作模块86可以包括：第二发送单元，配置为向所述网络发送所述应用向所述UE提供的服务将会被重定向到新的应用服务器的地址信息；第一接收单元，与上述第二发送单元连接，配置为接收所述网络提供的通知信息，所述通知消息用于通知所述应用所述UE访问所述应用的路径切换完成；重定向单元，与上述第一接收单元连接，配置为将所述应用向所述UE提供的服务重定向到所述新的应用服务器的地址。In an embodiment of the present invention, in the case that the first indication information is used to indicate that the traffic-directed mode used is the multi-homing traffic-directed mode, the operation module 86 may include: a second sending unit configured to the network Sending the service provided by the application to the UE to be redirected to the address information of the new application server; the first receiving unit is connected to the second sending unit, configured to receive the notification information provided by the network, The notification message is used to notify the application that the UE accesses the path switch of the application is completed; the redirection unit is connected to the first receiving unit, and configured to redirect the service provided by the application to the UE to the The address of the new application server.

需要说明的是：上述实施例提供的操作执行装置在进行操作执行时，仅以上述各程序模块的划分进行举例说明，实际应用中，可以根据需要而将上述处理分配由不同的程序模块完成，即将装置的内部结构划分成不同的程序模块，以完成以上描述的全部或者部分处理。另外，上述实施例提供的操作执行装置与操作执行方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。It should be noted that, when the operation execution device provided by the foregoing embodiment performs the operation execution, only the division of each of the above-mentioned program modules is illustrated. In an actual application, the process allocation may be completed by different program modules as needed. The internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the operation execution device and the operation execution method embodiment provided in the above embodiments are the same concept, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.

需要说明的是，上述装置可以位于应用层设备中，具体的，可以应用于AF应用功能实体中，但并不限于此。It should be noted that the foregoing apparatus may be located in an application layer device, and specifically, may be applied to an AF application function entity, but is not limited thereto.

本发明实施例还提供了一种应用层设备，包括：处理器，处理器用于运行程序，其中，程序运行时执行上述实施例任一项所述的操作执行方法。The embodiment of the present invention further provides an application layer device, including: a processor, the processor is configured to run a program, and the program execution method performs the operation execution method according to any one of the foregoing embodiments.

本发明的实施例还提供了一种存储介质，该存储介质包括存储的程序，其中，所述程序运行时执行上述任一项所述的信息发送方法；或者，所述程序运行时执行上述任一项所述的操作执行方。An embodiment of the present invention further provides a storage medium, where the storage medium includes a stored program, wherein the program is executed to execute the information transmitting method according to any one of the above items; or An operational performer as described.

可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM). A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

本发明的实施例还提供了一种处理器，该处理器用于运行程序，其中，该程序运行时执行上述任一项所述的信息发送方法；或者，该程序运行时执行上述任一项所述的操作执行方法。An embodiment of the present invention further provides a processor for running a program, wherein the program is executed to execute the information transmitting method according to any one of the above items; or the program is executed to execute any of the above The operation execution method described.

可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

为了更好地理解本发明，以下结合优选的实施例对本发明做进一步解释。For a better understanding of the invention, the invention is further explained in conjunction with the preferred embodiments.

可选实施例一Alternative embodiment 1

图9是根据本发明可选实施例一提供的为当SMF采用UL CL模式进行流量导向时，应用层与网络的交互流程示意图。如图9所示，该流程包括以下步骤：FIG. 9 is a schematic diagram of an interaction process between an application layer and a network when the SMF adopts the UL CL mode for traffic steering according to an alternative embodiment of the present invention. As shown in Figure 9, the process includes the following steps:

步骤900：业务访问流程，具体的，UE通过基站与UPF1建立的PDU session访问应用。UE和应用的一个应用服务器(Application Server 1)交互。网络为UE分配的IPv6 prefix 1。在UPF1上面安装了用于对用户正在访问的应用数据进行策略、计费、路由等进行控制的PDR规则0。Step 900: The service access process. Specifically, the UE accesses the application through the PDU session established by the base station and the UPF1. The UE interacts with an application server (Application Server 1) of the application. The IPv6 prefix 1 assigned by the network to the UE. A PDR rule 0 for controlling policy, charging, routing, and the like of application data that the user is accessing is installed on the UPF1.

步骤901：AF生成AF应用流量导向请求消息。请求的内容包括识别需要导向的流量信息(包括DNN和切片选择信息或AF-Service-Identifier)、流量导向的应用的位置信息(DNAI列表)、路由文档标识、需要流量导向的UE的信息等。Step 901: The AF generates an AF application traffic steering request message. The content of the request includes identifying traffic information that needs to be directed (including DNN and slice selection information or AF-Service-Identifier), location information (DNAI list) of the traffic-oriented application, routing document identification, information of the UE requiring traffic guidance, and the like.

步骤902a：若AF是不可信任的或AF的请求不是针对一个正在进行的PDU会话的，AF向NEF发送应用流量导向请求消息。Step 902a: If the AF is untrusted or the AF request is not for an ongoing PDU session, the AF sends an application traffic steering request message to the NEF.

步骤902b：NEF对请求进行授权，并可能执行一些必要的映射，譬如根据AF-Service-Identifier获得DNN和切片选择信息、DNAI列表和路由文档标识等。NEF将应用流量导向请求消息发送给PCF。Step 902b: The NEF authorizes the request and may perform some necessary mapping, such as obtaining DNN and slice selection information, DNAI list and routing document identification according to AF-Service-Identifier. The NEF sends an application traffic steering request message to the PCF.

步骤902c：当AF的请求针对一个正在进行的PDU会话，那么AF直接向对应的PCF发送应用流量导向请求消息。Step 902c: When the AF request is for an ongoing PDU session, the AF directly sends an application traffic steering request message to the corresponding PCF.

步骤903：PCF向AF返回应用流量导向应答消息。Step 903: The PCF returns an application traffic directed response message to the AF.

步骤904：PCF决定被AF的应用流量导向请求影响的每一个已存在的PDU-CAN会话，针对每一个PDU-CAN会话，PCF向SMF发送消息，消息中携带流量导向请求指示(相当于上述实施例中的流量导向请求指示信息)和DNAI，用于PDU-CAN会话修改和应答。Step 904: The PCF determines each existing PDU-CAN session affected by the application traffic steering request of the AF. For each PDU-CAN session, the PCF sends a message to the SMF, where the message carries a traffic steering request indication (equivalent to the above implementation). The traffic directed request indication information in the example) and DNAI are used for PDU-CAN session modification and response.

步骤905：SMF根据网络策略，网络的能力以及UE的能力决定采用UL CL进行流量导向。根据DNAI选择一个新的锚点UPF(即UPF2)和一个UL CL。UL CL可能和UPF2合一。Step 905: The SMF decides to use the UL CL for traffic steering according to the network policy, the capabilities of the network, and the capabilities of the UE. Select a new anchor point UPF (ie UPF2) and a UL CL according to DNAI. UL CL may be combined with UPF2.

步骤906：SMF向AMF发送会话管理请求消息，消息中携带UL CL接收上行数据的隧道信息。Step 906: The SMF sends a session management request message to the AMF, where the message carries the tunnel information of the uplink data received by the UL CL.

步骤907：AMF向RAN发送N2会话请求消息，消息中携带UL CL接收上行数据的隧道信息。RAN更新上行数据的隧道信息。Step 907: The AMF sends an N2 session request message to the RAN, where the message carries the tunnel information of the UL CL receiving the uplink data. The RAN updates the tunnel information of the uplink data.

步骤908：RAN向AMF返回N2会话请求应答消息，消息中可能携带更新的RAN接收下行数据的隧道信息。Step 908: The RAN returns an N2 session request response message to the AMF, where the message may carry the tunnel information of the updated RAN to receive downlink data.

步骤909：AMF向SMF返回会话管理应答消息，消息中携带接收到的更新的RAN接收下行数据的隧道信息。Step 909: The AMF returns a session management response message to the SMF, where the message carries the tunnel information of the received updated RAN to receive downlink data.

步骤910：SMF向UL CL发送N4会话建立请求，携带RAN接收到下行数据的隧道信息。UPF1和UPF2接收上行数据的隧道信息。UL CL返回 N4会话建立应答消息。Step 910: The SMF sends an N4 session establishment request to the UL CL, and carries the tunnel information that the RAN receives the downlink data. UPF1 and UPF2 receive tunnel information of uplink data. The UL CL returns an N4 session setup response message.

步骤911：SMF向UPF2发送N4会话建立请求，消息中携带UL CL接收下行数据的隧道信息。UPF2返回N4会话建立应答消息。Step 911: The SMF sends an N4 session establishment request to the UPF2, where the message carries the tunnel information of the UL CL receiving the downlink data. UPF2 returns an N4 session setup response message.

步骤912：SMF向UPF1发送N4会话修改请求消息，消息中携带UL CL接收下行数据的隧道信息。UPF1返回会话修改应答消息。Step 912: The SMF sends an N4 session modification request message to the UPF1, where the message carries the tunnel information of the downlink data received by the UL CL. UPF1 returns a session modification response message.

步骤913：SMF向AF发送通知消息(相当于上述第一指示信息)，消息中携带UL CL的指示。UL CL指示可以不是一个显示的指示。由于若图2中Multi-Homing场景中，SMF向AF上报了新的IPv6 Prefix。所有若本步骤中，SMF没有向AF上报新的IPv6 Prefix，那么AF就能判断出SMF采用UL CL进行流量导向。Step 913: The SMF sends a notification message (corresponding to the first indication information) to the AF, where the message carries an indication of the UL CL. The UL CL indication may not be an indication of a display. Because in the Multi-Homing scenario in Figure 2, the SMF reports a new IPv6 Prefix to the AF. If all the SMFs do not report a new IPv6 Prefix to the AF in this step, the AF can determine that the SMF uses the UL CL for traffic steering.

步骤914：应用层根据该指示与UE进行交互。通知UE与应用的另一个应用服务器(Application Server 2)交互，继续进行业务访问。Step 914: The application layer interacts with the UE according to the indication. The UE is notified to interact with another application server (Application Server 2) of the application to continue the service access.

步骤915a：应用层切换或重选完成后，AF向NEF发送应用流量导向请求消息，消息中携带当前的流描述信息，信息中至少包括Application Server 2的地址信息。Step 915a: After the application layer switching or reselection is completed, the AF sends an application traffic steering request message to the NEF, where the message carries the current flow description information, where the information includes at least the address information of the Application Server 2.

步骤915b：NEF对应用流量导向请求进行授权，NEF将应用流量导向请求消息发送给PCF。Step 915b: The NEF authorizes the application traffic steering request, and the NEF sends the application traffic steering request message to the PCF.

步骤915c：AF直接向对应的PCF发送应用流量导向请求消息，消息中携带当前的流描述信息，信息中至少包括Application Server 2的地址信息。Step 915c: The AF sends an application traffic directing request message to the corresponding PCF, where the message carries the current flow description information, where the information includes at least the address information of the Application Server 2.

步骤916：PCF进行新的策略决策，包括PCF根据流描述信息制定PCC规则。PCF将新的策略发送给SMF。SMF根据新制定的PCC规则生成PDR规则1和PDR规则2；其中，PDR规则1(相当于上述实施例中的第一规则)将提供给UL CL，指示UL CL将从RAN接收到的用户访问应用的上行数据发送给UPF2(相当于上述实施例中的第二UPF)；PDR规则2将提供给UPF2，包含根据路由文档标识制定的流量导向策略，QoS策略等。Step 916: The PCF performs a new policy decision, including the PCF formulating a PCC rule according to the flow description information. The PCF sends the new policy to the SMF. The SMF generates PDR rule 1 and PDR rule 2 according to the newly formulated PCC rule; wherein PDR rule 1 (corresponding to the first rule in the above embodiment) is provided to the UL CL, indicating that the UL CL receives the user access from the RAN. The uplink data of the application is sent to the UPF2 (corresponding to the second UPF in the foregoing embodiment); the PDR rule 2 is provided to the UPF2, including the traffic steering policy, the QoS policy, and the like according to the routing document identifier.

步骤917：SMF将包含有PDR规则1的N4会话修改请求消息发送给UL CL，这样UL CL从RAN接收到的用户访问应用的上行数据发送给UPF2。而其他数据仍然发送给UPF1。UL CL安装PDR规则1后向SMF返回N4会话修改应答消息。Step 917: The SMF sends an N4 session modification request message including the PDR rule 1 to the UL CL, so that the uplink data of the user access application received by the UL CL from the RAN is sent to the UPF2. Other data is still sent to UPF1. The UL CL installs the PDR rule 1 and returns an N4 session modification response message to the SMF.

步骤918：SMF将包含有PDR规则2的N4会话修改请求消息发送给UPF2，这样UPF2就能对UE访问应用的数据进行策略、计费、路由控制。UPF2向SMF返回N4会话修改应答消息。Step 918: The SMF sends an N4 session modification request message including the PDR rule 2 to the UPF2, so that the UPF2 can perform policy, charging, and routing control on the data accessed by the UE. UPF2 returns an N4 session modification response message to the SMF.

步骤919：SMF发送N4会话修改请求消息给UPF1，该消息用于指示UPF1将之前安装的PDU规则0删除；UPF1删除PDU规则0后返回N4会话修改应答消息。Step 919: The SMF sends an N4 session modification request message to the UPF1, the message is used to instruct the UPF1 to delete the previously installed PDU rule 0; the UPF1 deletes the PDU rule 0 and returns an N4 session modification response message.

通过上述流程，应用层先与UE交互进行应用成重选后，在将重选后的流描述信息提供给5G核心网，5G核心网再对用户访问应用的路径进行切换(即用户面优化)。After the application layer is first applied to the UE for reselection, the flow description information is re-selected to the 5G core network, and the 5G core network switches the path of the user access application (ie, user plane optimization). .

可选实施例二Alternative embodiment 2

图10是根据本发明可选实施例二提供的为当SMF采用Multi-homing模式进行流量导向时，应用层与网络的交互流程示意图。如图10所示，包括以下步骤：FIG. 10 is a schematic diagram of an interaction process between an application layer and a network when the SMF adopts the Multi-homing mode for traffic steering according to an alternative embodiment of the present invention. As shown in Figure 10, the following steps are included:

步骤1000：业务访问流程，具体的，UE通过基站与UPF1建立的PDU session访问应用。UE和应用的一个应用服务器(Application Server 1)交互。网络为UE分配IPv6 prefix 1。在UPF1上面安装了用于对用户正在访问的应用数据进行策略、计费、路由等进行控制的PDR规则0。Step 1000: The service access process. Specifically, the UE accesses the application through the PDU session established by the base station and the UPF1. The UE interacts with an application server (Application Server 1) of the application. The network allocates IPv6 prefix 1 to the UE. A PDR rule 0 for controlling policy, charging, routing, and the like of application data that the user is accessing is installed on the UPF1.

步骤1001：AF生成AF应用流量导向请求消息。请求的内容包括识别需要导向的流量信息(包括DNN和切片选择信息或AF-Service-Identifier)、流量导向的应用的位置信息(DNAI列表)、路由文档标识、需要流量导向的UE的信息等。Step 1001: The AF generates an AF application traffic steering request message. The requested content includes identifying traffic information that needs to be directed (including DNN and slice selection information or AF-Service-Identifier), location information of the traffic-oriented application (DNAI list), routing document identification, information of the UE requiring traffic steering, and the like.

步骤1002a：若AF是不可信任的或AF的请求不是针对一个正在进行的PDU会话的，AF向NEF发送应用流量导向请求消息。Step 1002a: If the AF is untrustworthy or the AF request is not for an ongoing PDU session, the AF sends an application traffic steering request message to the NEF.

步骤1002b：NEF对请求进行授权，并可能执行一些必要的映射，譬如根据AF-Service-Identifier获得DNN和切片选择信息、DNAI列表和路由文档标识等。NEF将应用流量导向请求消息发送给PCF。Step 1002b: The NEF authorizes the request and may perform some necessary mapping, such as obtaining DNN and slice selection information, DNAI list, and routing document identification according to the AF-Service-Identifier. The NEF sends an application traffic steering request message to the PCF.

步骤1002c：当AF的请求针对一个正在进行的PDU会话，那么AF直接向对应的PCF发送应用流量导向请求消息。Step 1002c: When the AF request is for an ongoing PDU session, the AF directly sends an application traffic steering request message to the corresponding PCF.

步骤1003：PCF向AF返回应用流量导向应答消息。Step 1003: The PCF returns an application traffic directed response message to the AF.

步骤1004：PCF决定被AF的应用流量导向请求影响的每一个已存在的PDU-CAN会话，针对每一个PDU-CAN会话，PCF向SMF发送消息，消息中携带流量导向请求指示(相当于上述实施例的流量导向请求指示信息)和DNAI，用于PDU-CAN会话修改和应答。Step 1004: The PCF determines each existing PDU-CAN session affected by the application traffic steering request of the AF. For each PDU-CAN session, the PCF sends a message to the SMF, where the message carries a traffic steering request indication (equivalent to the above implementation). The example traffic directed request indication information) and DNAI are used for PDU-CAN session modification and response.

步骤1005：SMF根据网络策略，网络的能力以及UE的能力决定采用Multi-homing进行流量导向。根据DNAI选择一个新的锚点UPF(即UPF2)和一个分叉点BP。BP可能和UPF2合一。此外，SMF根据UPF2为UE分配IPv6 Prefix 2。Step 1005: The SMF decides to use Multi-homing for traffic steering according to the network policy, the capabilities of the network, and the capabilities of the UE. Select a new anchor point UPF (ie UPF2) and a bifurcation point BP according to DNAI. BP may be one with UPF2. In addition, the SMF allocates IPv6 Prefix 2 to the UE according to UPF2.

步骤1006：SMF向AMF发送会话管理请求消息，消息中携带BP接收上行数据的隧道信息。Step 1006: The SMF sends a session management request message to the AMF, where the message carries the tunnel information that the BP receives the uplink data.

步骤1007：AMF向RAN发送N2会话请求消息，消息中携带BP接收上行数据的隧道信息。RAN更新上行数据的隧道信息。Step 1007: The AMF sends an N2 session request message to the RAN, where the message carries the tunnel information that the BP receives the uplink data. The RAN updates the tunnel information of the uplink data.

步骤1008：RAN向AMF返回N2会话请求应答消息，消息中可能携带更新的RAN接收下行数据的隧道信息。Step 1008: The RAN returns an N2 session request response message to the AMF, where the message may carry the tunnel information of the updated RAN to receive downlink data.

步骤1009：AMF向SMF返回N2会话请求应答消息，消息中携带接收到的更新的RAN接收下行数据的隧道信息。Step 1009: The AMF returns an N2 session request response message to the SMF, where the message carries the tunnel information of the received updated RAN to receive downlink data.

步骤1010：SMF向BP发送N4会话建立请求，携带RAN接收下行数据的隧道信息。UPF1和UPF2接收上行数据的隧道信息。BP返回N4会话建立应答消息。Step 1010: The SMF sends an N4 session establishment request to the BP, and carries the tunnel information that the RAN receives the downlink data. UPF1 and UPF2 receive tunnel information of uplink data. BP returns an N4 session setup response message.

步骤1011：SMF向UPF2发送N4会话建立请求，消息中携带BP接收下行数据的隧道信息。UPF2返回N4会话建立应答消息。Step 1011: The SMF sends an N4 session establishment request to the UPF2, where the message carries the tunnel information that the BP receives the downlink data. UPF2 returns an N4 session setup response message.

步骤1012：SMF向UPF1发送N4会话修改请求消息，消息中携带BP接收下行数据的隧道信息。UPF1返回会话修改应答消息。Step 1012: The SMF sends an N4 session modification request message to the UPF1, where the message carries the tunnel information that the BP receives the downlink data. UPF1 returns a session modification response message.

步骤1013：SMF向AF发送通知消息(相当于上述实施例的第一指示信息)，消息中携带Multi-Homing的指示以及可能的IPv6 Prefix 2。SMF也可以不带单独的Multi-Homing指示，因为若上报了IPv6 Prefix 2就可以表示SMF采用了Multi-Homing的方式进行流量导向。Step 1013: The SMF sends a notification message (corresponding to the first indication information of the foregoing embodiment) to the AF, where the message carries an indication of Multi-Homing and possibly IPv6 Prefix 2. SMF can also be used without a separate Multi-Homing indication, because if IPv6 Prefix 2 is reported, it can indicate that SMF uses Multi-Homing for traffic steering.

步骤1014a：AF向NEF发送应用流量导向请求消息，消息中携带新的Application Server 2的地址信息。Step 1014a: The AF sends an application traffic steering request message to the NEF, where the message carries the address information of the new Application Server 2.

步骤1014b：NEF对应用流量导向请求进行授权，NEF将应用流量导向请求消息发送给PCF。Step 1014b: The NEF authorizes the application traffic steering request, and the NEF sends the application traffic steering request message to the PCF.

步骤1014c：AF直接向对应的PCF发送应用流量导向请求消息，消息中携带新的Application Server 2的地址信息。Step 1014c: The AF sends an application traffic directing request message to the corresponding PCF, where the message carries the address information of the new Application Server 2.

步骤1015：PCF向AF返回应用流量导向应答消息。Step 1015: The PCF returns an application traffic directed response message to the AF.

步骤1016：PCF进行新的策略决策，包括PCF根据新的Application Server 2的地址信息制定PCC规则。PCF将新的策略发送给SMF。SMF制定PDR规则1和PDR规则2；其中PDR规则1将发送给BP用于指示BP将源地址为IPv6 Prefix 1的上行数据发送给UPF1，PDR规则2(相当于上述实施例的第二规则)将发送给BP用于指示BP将源地址为IPv6 Prefix 2的上行数据发送给UPF2。此外，SMF根据PCC规则生成PDR规则3。PDR规则3中携带包含IPv6 Prefix 2以及Application Server 2地址信息的过滤器模板，以及相应的QoS、计费、流量导向等策略。PDR规则3将发送给UPF2。Step 1016: The PCF makes a new policy decision, including the PCF formulating a PCC rule according to the address information of the new Application Server 2. The PCF sends the new policy to the SMF. The SMF formulates PDR rule 1 and PDR rule 2; wherein PDR rule 1 is sent to the BP to instruct the BP to send the uplink data whose source address is IPv6 Prefix 1 to UPF1, PDR rule 2 (corresponding to the second rule of the above embodiment) It will be sent to the BP to instruct the BP to send the uplink data whose source address is IPv6 Prefix 2 to UPF2. In addition, the SMF generates PDR rule 3 according to PCC rules. PDR rule 3 carries a filter template containing IPv6 Prefix 2 and Application Server 2 address information, and corresponding QoS, charging, and traffic steering policies. PDR Rule 3 will be sent to UPF2.

步骤1017：SMF将包含有PDR规则1和PDR规则2的N4会话修改请求消息发送BP，这样BP从RAN接收源地址为IPv6 Prefix 1的上行数据发送给UPF1，源地址为IPv6 Prefix 2的上行数据发送UPF2。BP安装PDR规则1后向SMF返回N4会话修改应答消息。Step 1017: The SMF sends the N4 session modification request message including the PDR rule 1 and the PDR rule 2 to the BP, so that the BP receives the uplink data whose source address is IPv6 Prefix 1 from the RAN and sends it to the UPF1, and the source address is the uplink data of the IPv6 Prefix 2. Send UPF2. After installing PDR rule 1, BP returns an N4 session modification response message to the SMF.

步骤1018：SMF将包含有PDR规则3的N4会话修改请求消息发送UPF2，这样UPF2就能对UE访问应用的数据进行策略、计费、路由控制的。UPF2向SMF返回N4会话修改应答消息。Step 1018: The SMF sends the N4 session modification request message including the PDR rule 3 to the UPF2, so that the UPF2 can perform policy, charging, and routing control on the data accessed by the UE. UPF2 returns an N4 session modification response message to the SMF.

步骤1019：SMF通过UPF2发送路由通告消息给UE，消息中携带IPv6 Prefix 2以及路由选项信息2，其中路由选项消息中携带Application Server 2的地址信息。Step 1019: The SMF sends a route advertisement message to the UE through the UPF2, where the message carries the IPv6 Prefix 2 and the routing option information 2, where the routing option message carries the address information of the Application Server 2.

步骤1020：SMF通过UPF1发送路由通告消息给UE，消息中携带IPv6 Prefix 1以及路由选项信息1。Step 1020: The SMF sends a route advertisement message to the UE through the UPF1, where the message carries the IPv6 Prefix 1 and the route option information 1.

步骤1021：SMF通知AF用户面重选(即路径切换)完成。Step 1021: The SMF notifies the AF user that the reselection (ie, path switching) is completed.

步骤1022：AF与UE交互，进行应用层重定向(或应用层重选)。包括应用通知UE访问Application Server 2，UE根据路由选项信息2采用IPv6 Prefix 2访问应用。Step 1022: The AF interacts with the UE to perform application layer redirection (or application layer reselection). The application includes the UE to notify the Application Server 2, and the UE accesses the application by using IPv6 Prefix 2 according to the routing option information 2.

以下为可选步骤。The following are optional steps.

步骤1023a：AF向NEF发送请求消息，消息中携带业务信息，包括当前新的流描述信息。Step 1023a: The AF sends a request message to the NEF, where the message carries the service information, including the current new flow description information.

步骤1023b：NEF对请求消息进行授权，NEF将请求消息发送给PCF。Step 1023b: The NEF authorizes the request message, and the NEF sends the request message to the PCF.

步骤1023c：AF直接向对应的PCF发送请求消息，消息中携带业务信息，包括当前的流描述信息。Step 1023c: The AF sends a request message to the corresponding PCF, where the message carries the service information, including the current flow description information.

步骤1024：PCF向AF返回应答消息。Step 1024: The PCF returns a response message to the AF.

步骤1025：PCF进行新的策略决策。根据新的流描述信息更新之前制定的PCC规则。PCF将新的策略发送给SMF。SMF根据PCC规则更新PDR规则3。PDR规则3中携带包含新的流描述信息的过滤器模板，以及相应的QoS、计费、流量导向等策略。PDR规则3将发送给UPF2；Step 1025: The PCF makes a new policy decision. The previously established PCC rules are updated based on the new flow description information. The PCF sends the new policy to the SMF. The SMF updates the PDR rule 3 according to the PCC rules. PDR rule 3 carries a filter template containing new flow description information, and corresponding policies such as QoS, charging, and traffic steering. PDR rule 3 will be sent to UPF2;

步骤1026：SMF发送N4会话修改请求消息给UPF1，该消息用于指示UPF1将PDR规则0删除；UPF1删除PDR规则0后返回N4会话修改应答消息。Step 1026: The SMF sends an N4 session modification request message to the UPF1, which is used to instruct the UPF1 to delete the PDR rule 0. The UPF1 deletes the PDR rule 0 and returns an N4 session modification response message.

步骤1027：SMF发送携带有更新的PDR规则3的N4会话修改请求消息给UPF2；这样UPF2就能对UE访问应用的数据进行策略、计费、路由控制。UPF2向SMF返回N4会话修改应答消息。Step 1027: The SMF sends an N4 session modification request message carrying the updated PDR rule 3 to the UPF2. In this way, the UPF2 can perform policy, charging, and routing control on the data accessed by the UE. UPF2 returns an N4 session modification response message to the SMF.

通过上述流程，5G核心网对用户访问应用的路径进行切换(即用户面优化)完成后通知应用层，应用层再与UE交互完成应用层的重选(或应用层切换。Through the above process, the 5G core network notifies the application layer after the user accesses the application path (ie, user plane optimization) is completed, and the application layer then interacts with the UE to complete the application layer reselection (or application layer switching).

显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

一种信息发送方法，包括：A method for transmitting information, including:

为用户设备UE选择第一用户面功能UPF作为协议数据单元PDU会话的第一锚点之后，接收策略和控制功能PCF发送的流量导向请求指示信息，其中，所述流量导向请求指示信息为所述PCF根据所述UE正在访问的应用提供的用于请求网络进行流量导向的流量导向请求制定的；After the first user plane function UPF is selected as the first anchor point of the protocol data unit PDU session, the user equipment UE receives the traffic steering request indication information sent by the policy and control function PCF, where the traffic steering request indication information is The PCF is configured according to a traffic steering request provided by the application that the UE is accessing to request the network to perform traffic steering;

向所述应用返回用于指示所述网络进行流量导向时使用的流量导向方式的第一指示信息，所述流量导向方式包括以下之一：上行链路分类器UL CL流量导向方式，多归属流量导向方式。And returning, to the application, first indication information, which is used to indicate the traffic steering mode used by the network to perform traffic steering, where the traffic steering mode includes one of the following: an uplink classifier UL CL traffic steering mode, and a multi-homing traffic Guided approach.
根据权利要求1所述的方法，其中，所述第一指示信息包括以下至少之一信息：用于指示所述流量导向方式为UL CL流量导向方式还是多归属流量导向方式的显式指示信息，是否发送第一互联网协议第6版IPv6前缀信息；The method according to claim 1, wherein the first indication information comprises at least one of the following information: an explicit indication information indicating whether the traffic directing mode is a UL CL traffic directed mode or a multi-homed traffic directed mode, Whether to send the IPv6 prefix information of the first Internet Protocol version 6;

其中，在发送所述第一IPv6前缀信息的情况下，所述第一指示信息用于指示所述使用的所述流量导向方式为多归属流量导向方式，在未发送所述第一IPv6前缀信息的情况下，所述第一指示信息用于指示所述使用的所述流量导向方式为UL CL流量导向方式。In the case that the first IPv6 prefix information is sent, the first indication information is used to indicate that the used traffic steering mode is a multi-homed traffic steering mode, and the first IPv6 prefix information is not sent. In the case that the first indication information is used to indicate that the traffic steering mode used is a UL CL traffic steering mode.
根据权利要求1所述的方法，其中，在所述第一指示信息用于指示所述使用的流量导向方式为UL CL流量导向方式的情况下，在向所述应用返回用于指示所述网络进行流量导向时使用的流量导向方式的第一指示信息之后，所述方法还包括：The method according to claim 1, wherein, in a case where the first indication information is used to indicate that the used traffic steering mode is a UL CL traffic steering mode, returning to the application for indicating the network After the first indication information of the traffic-oriented manner used in the traffic steering, the method further includes:

接收所述PCF实体发送的第一策略；其中，所述第一策略为所述PCF实体根据所述应用在完成应用重选后提供的流描述信息制定的策略；Receiving a first policy sent by the PCF entity, where the first policy is a policy formulated by the PCF entity according to the flow description information provided by the application after the application reselection is completed;

根据所述第一策略对所述用户设备访问所述应用的路径进行切换。And switching, according to the first policy, a path for the user equipment to access the application.
根据权利要求3所述的方法，其中，所述根据所述第一策略对所述用户设备访问所述应用的路径进行切换包括：The method of claim 3, wherein the switching the path of the user equipment to access the application according to the first policy comprises:

根据所述第一策略制定第一规则；Determining a first rule according to the first policy;

将所述第一规则发送给UL CL；其中，所述第一规则用于指示所述UL CL将接收到的所述UE访问所述应用的上行数据发送给作为所述PDU会话的第二锚点的第二UPF。Transmitting the first rule to the UL CL; wherein the first rule is used to instruct the UL CL to send the received uplink data of the UE to the application to a second anchor that is the PDU session. The second UPF of the point.
根据权利要求2所述的方法，其中，在所述第一指示信息用于指示所述使用的流量导向方式为多归属流量导向方式的情况下，在向所述应用返回用于指示所述网络进行流量导向时使用的流量导向方式的第一指示信息之后，所述方法还包括：The method according to claim 2, wherein, when the first indication information is used to indicate that the used traffic steering mode is a multi-homed traffic steering mode, returning to the application for indicating the network After the first indication information of the traffic-oriented manner used in the traffic steering, the method further includes:

接收所述PCF实体发送的第二策略；其中，所述第二策略为所述PCF实体根据所述应用向所述UE提供的服务将会被重定向到的应用服务器的地址信息制定的策略；Receiving a second policy sent by the PCF entity, where the second policy is a policy formulated by the PCF entity according to address information of an application server to which the service provided by the application to the UE is to be redirected;

根据所述第二策略对所述用户设备访问所述应用的路径进行切换。And switching, according to the second policy, a path of the user equipment accessing the application.
根据权利要求5所述的方法，其中，所述根据所述第二策略对所述用户设备访问所述应用的路径进行切换包括：The method of claim 5, wherein the switching the path of the user equipment to access the application according to the second policy comprises:

根据所述第二策略制定第二规则；Forming a second rule according to the second policy;

将所述第二规则发送给分叉点BP，其中所述第二规则用于指示所述BP将接收到的所述UE访问所述应用的上行数据发送给作为所述PDU会话的第三锚点的第三UPF；Sending the second rule to the branch point BP, where the second rule is used to instruct the BP to send the received uplink data of the UE to the application to the third anchor as the PDU session. The third UPF of the point;

通过所述第三UPF向所述UE发送路由通告消息，其中，所述路由通告消息中携带所述第一IPv6前缀信息和路由选项信息，所述路由选项信息中携带所述应用向所述UE提供的服务将会被重定向到的应用服务器的地址信息。Sending, by the third UPF, a route advertisement message to the UE, where the route advertisement message carries the first IPv6 prefix information and routing option information, where the routing option information carries the application to the UE The address information of the application server to which the provided service will be redirected.
根据权利要求5所述的方法，其中，所述根据所述第二策略对所述用户设备访问所述应用的路径进行切换之后，包括：The method of claim 5, wherein after the switching of the path of the user equipment accessing the application according to the second policy, the method comprises:

向所述应用层发送通知信息，其中，所述通知信息用于通知所述应用所述UE访问所述应用的路径切换完成。Sending notification information to the application layer, where the notification information is used to notify the application that the UE accesses the path switch of the application is completed.
一种操作执行方法，包括：An operational execution method comprising:

发送用于请求网络进行流量导向的流量导向请求；Sending a traffic directed request for requesting network traffic steering;

接收所述网络返回的用于指示所述网络进行流量导向时使用的流量导向方式的第一指示信息，其中，所述流量导向方式包括以下之一：上行链路分类器UL CL流量导向方式，多归属流量导向方式；And receiving, by the network, first indication information that is used by the network to indicate a traffic-oriented manner used by the network to perform traffic steering, where the traffic-oriented manner includes one of the following: an uplink classifier UL CL traffic guidance manner, Multi-homed traffic-oriented approach;

根据所述第一指示信息指示的所述流量导向方式执行应用操作。Performing an application operation according to the traffic directed manner indicated by the first indication information.
根据权利要求8所述的方法，其中，所述第一指示信息包括以下至少之一信息：用于指示所述使用的所述流量导向方式为UL CL流量导向方式还是多归属流量导向方式的显式指示信息，是否接收到第一互联网协议第6版IPv6前缀信息；其中，在接收到所述第一IPv6前缀信息的情况下，所述第一指示信息用于指示所述使用的所述流量导向方式为多归属流量导向方式，在未接收到所述第一IPv6前缀信息的情况下，所述第一指示信息用于指示所述使用的所述流量导向方式为UL CL流量导向方式。The method according to claim 8, wherein the first indication information comprises at least one of the following information: indicating whether the traffic directed mode of the use is a UL CL traffic directed mode or a multi-homed traffic directed mode The indication information, whether the first Internet Protocol version 6 IPv6 prefix information is received, wherein the first indication information is used to indicate the used traffic when the first IPv6 prefix information is received The guiding mode is a multi-homing traffic-directed mode. When the first IPv6 prefix information is not received, the first indication information is used to indicate that the used traffic steering mode is a UL CL traffic guiding mode.
根据权利要求9所述的方法，其中，在所述第一指示信息用于指示所述使用的流量导向方式为UL CL流量导向方式的情况下，根据所述第一指示信息指示的所述流量导向方式执行应用操作包括：The method according to claim 9, wherein, when the first indication information is used to indicate that the used traffic steering mode is a UL CL traffic steering mode, the traffic indicated according to the first indication information The guided mode of performing application operations includes:

执行应用重选操作；Perform an application reselection operation;

将重选后的流描述信息发送给策略和控制功能PCF；其中，所述流描述信息用于所述网络对用户设备UE访问应用的路径进行切换。The re-selected flow description information is sent to the policy and control function PCF; wherein the flow description information is used by the network to switch the path of the user equipment UE accessing the application.
根据权利要求10所述的方法，其中，所述重选后的流描述信息包括所述UE的访问已被重定向到的应用服务器的地址信息。The method of claim 10, wherein the reselected flow description information comprises address information of an application server to which the access of the UE has been redirected.
根据权利要求9所述的方法，其中，在所述第一指示信息用于指示所述使用的流量导向方式为多归属流量导向方式的情况下，所述根据所述第一指示信息指示的所述流量导向方式执行应用操作包括：The method according to claim 9, wherein, in the case that the first indication information is used to indicate that the used traffic steering mode is a multi-homed traffic steering mode, the indication according to the first indication information The flow-oriented manner of performing application operations includes:

向所述网络发送所述应用向UE提供的服务将会被重定向到新的应用服务器的地址信息；Sending to the network, the service provided by the application to the UE will be redirected to the address information of the new application server;

接收所述网络提供的通知信息，所述通知消息用于通知所述应用所述UE访问所述应用的路径切换完成；Receiving the notification information provided by the network, where the notification message is used to notify the application that the UE accesses the path switch of the application is completed;

将所述应用向所述UE提供的服务重定向到所述新的应用服务器的地址。Redirecting the service provided by the application to the UE to the address of the new application server.
一种信息发送装置，包括：An information sending device includes:

第一接收模块，配置为为用户设备UE选择第一用户面功能UPF作为协议数据单元PDU会话的第一锚点之后，接收策略和控制功能PCF发送的流量导向请求指示信息，其中，所述流量导向请求指示信息为所述PCF根据所述UE正在访问的应用提供的用于请求网络进行流量导向的流量导向请求制定的；a first receiving module, configured to: after the first user plane function UPF is selected as the first anchor point of the protocol data unit PDU session, the user equipment UE receives the traffic steering request indication information sent by the policy and control function PCF, where the traffic is sent The guidance request indication information is set by the PCF according to the traffic guidance request for requesting the network to perform traffic guidance according to the application that the UE is accessing;

第一发送模块，配置为向所述应用返回用于指示所述网络进行流量导向时使用的流量导向方式的第一指示信息，所述流量导向方式包括以下之一：上行链路分类器UL CL流量导向方式，多归属流量导向方式。The first sending module is configured to return, to the application, first indication information used to indicate a traffic steering manner used by the network to perform traffic steering, where the traffic steering manner includes one of the following: an uplink classifier UL CL Traffic-oriented mode, multi-homed traffic-oriented mode.
根据权利要求13所述的装置，其中，所述第一指示信息包括以下至少之一信息：用于指示所述使用的所述流量导向方式为UL CL流量导向方式还是多归属流量导向方式的显式指示信息，是否发送第一互联网协议第6版IPv6前缀信息；The apparatus according to claim 13, wherein the first indication information comprises at least one of the following information: indicating whether the traffic directed mode of the usage is a UL CL traffic directed mode or a multi-homed traffic directed mode Indicates whether to send the IPv6 prefix information of the first Internet Protocol version 6;

其中，在发送所述第一IPv6前缀信息的情况下，所述第一指示信息用于指示所述使用的所述流量导向方式为多归属流量导向方式，在未发送所述第一IPv6前缀信息的情况下，所述第一指示信息用于指示所述使用的所述流量导向方式为UL CL流量导向方式。In the case that the first IPv6 prefix information is sent, the first indication information is used to indicate that the used traffic steering mode is a multi-homed traffic steering mode, and the first IPv6 prefix information is not sent. In the case that the first indication information is used to indicate that the traffic steering mode used is a UL CL traffic steering mode.
根据权利要求13所述的装置，其中，在所述第一指示信息用于指示所述使用的流量导向方式为UL CL流量导向方式的情况下，所述装置还包括：The device according to claim 13, wherein, in the case that the first indication information is used to indicate that the used traffic guidance mode is a UL CL traffic guidance mode, the device further includes:

第二接收模块，配置为接收所述PCF实体发送的第一策略；其中，所述第一策略为所述PCF实体根据所述应用在完成应用重选后提供的流描述信息制定的策略；a second receiving module, configured to receive a first policy sent by the PCF entity, where the first policy is a policy that is determined by the PCF entity according to the flow description information that is provided by the application after the application reselection is completed;

第一切换模块，配置为根据所述第一策略对所述用户设备访问所述应用的路径进行切换。The first switching module is configured to switch the path of the user equipment to access the application according to the first policy.
根据权利要求15所述的装置，其中，所述第一切换模块包括：The apparatus of claim 15, wherein the first switching module comprises:

第一生成单元，配置为根据所述第一策略制定第一规则；a first generating unit, configured to formulate a first rule according to the first policy;

第一发送单元，配置为将所述第一规则发送给UL CL；其中，所述第一规则用于指示所述UL CL将接收到的所述UE访问所述应用的上行数据发送给作为所述PDU会话的第二锚点的第二UPF。a first sending unit, configured to send the first rule to the UL CL, where the first rule is used to indicate that the UL CL sends the received uplink data of the UE to the application to the The second UPF of the second anchor of the PDU session.
根据权利要求14所述的装置，其中，在所述第一指示信息用于指示所述使用的流量导向方式为多归属流量导向方式的情况下，所述装置还包括：The device according to claim 14, wherein, in the case that the first indication information is used to indicate that the traffic-directed mode of use is a multi-homed traffic-directed mode, the device further includes:

第三接收模块，配置为接收所述PCF实体发送的第二策略；其中，所述第二策略为所述PCF实体根据所述应用提供的所述UE的访问将会被重定向到的应用服务器的地址信息制定的策略；a third receiving module, configured to receive a second policy sent by the PCF entity, where the second policy is an application server to which the PCF entity is redirected according to the application provided by the PCF entity Strategy for the development of address information;

第二切换模块，配置为根据所述第二策略对所述用户设备访问所述应用的路径进行切换。The second switching module is configured to switch the path of the user equipment to access the application according to the second policy.
根据权利要求17所述的装置，其中，所述第二切换模块包括：The apparatus of claim 17, wherein the second switching module comprises:

第二生成单元，配置为根据所述第二策略制定第二规则；a second generating unit, configured to formulate a second rule according to the second policy;

第二发送单元，配置为将所述第二规则发送给分叉点BP，其中所述第二规则用于指示所述BP将接收到的所述UE访问所述应用的上行数据发送给作为所述PDU会话的第三锚点的第三UPF；a second sending unit, configured to send the second rule to the branching point BP, where the second rule is used to instruct the BP to send the received uplink data of the UE to the application to the a third UPF of the third anchor point of the PDU session;

第三发送单元，配置为通过所述第三UPF向所述用户设备发送路由通告消息，其中，所述路由通告消息中携带为所述第一IPv6前缀信息和路由选项信息，所述路由选项信息中携带所述应用提供的所述UE的访问将会被重定向到的应用服务器的地址信息。a third sending unit, configured to send, by using the third UPF, a route advertisement message to the user equipment, where the route advertisement message carries the first IPv6 prefix information and routing option information, and the routing option information The address information of the application server to which the access provided by the UE provided by the application is to be redirected is carried.
根据权利要求17所述的装置，其中，所述装置还包括：The apparatus of claim 17 wherein said apparatus further comprises:

第二发送模块，配置为向所述应用层发送通知信息，其中，所述通知信息用于通知所述应用层用户设备访问应用的路径切换完成。The second sending module is configured to send the notification information to the application layer, where the notification information is used to notify the application layer user equipment that the path switching of the application is completed.
一种操作执行装置，包括：An operation execution device comprising:

发送模块，配置为发送用于请求网络进行流量导向的流量导向请求；a sending module, configured to send a traffic directing request for requesting a network for traffic steering;

接收模块，配置为接收所述网络返回的用于指示所述网络进行流量导向时使用的流量导向方式的第一指示信息，其中，所述流量导向方式包括以下之一：上行链路分类器UL CL流量导向方式，多归属流量导向方式；The receiving module is configured to receive, by the network, first indication information that is used by the network to indicate a traffic-oriented manner used by the network to perform traffic steering, where the traffic steering mode includes one of the following: an uplink classifier UL CL traffic-oriented mode, multi-homed traffic-oriented mode;

操作模块，配置为根据所述第一指示信息指示的所述流量导向方式执行应用操作。The operation module is configured to perform an application operation according to the traffic guidance manner indicated by the first indication information.
根据权利要求20所述的装置，其中，所述第一指示信息包括以下至少之一信息：用于指示所述使用的所述流量导向方式为UL CL流量导向方式还是多归属流量导向方式的显式指示信息，是否接收到第一互联网协议第6版IPv6前缀信息；其中，在接收到所述第一IPv6前缀信息的情况下，所述第一指示信息用于指示所述使用的所述流量导向方式为多归属流量导向方式，在未接收到所述第一IPv6前缀信息的情况下，所述第一指示信息用于指示所述使用的所述流量导向方式为UL CL流量导向方式。The apparatus according to claim 20, wherein the first indication information comprises at least one of the following information: indicating whether the traffic directed mode of the usage is a UL CL traffic directed mode or a multi-homed traffic directed mode The indication information, whether the first Internet Protocol version 6 IPv6 prefix information is received, wherein the first indication information is used to indicate the used traffic when the first IPv6 prefix information is received The guiding mode is a multi-homing traffic-directed mode. When the first IPv6 prefix information is not received, the first indication information is used to indicate that the used traffic steering mode is a UL CL traffic guiding mode.
根据权利要求21所述的装置，其中，在所述第一指示信息用于指示所述使用的流量导向方式为UL CL流量导向方式的情况下，所述操作模块包括：The device according to claim 21, wherein, in the case that the first indication information is used to indicate that the used traffic steering mode is a UL CL traffic guiding mode, the operating module includes:

第一重选单元，配置为执行应用重选操作；a first reselecting unit configured to perform an application reselection operation;

第一发送单元，配置为将重选后的流描述信息发送给策略和控制功能PCF；其中，所述流描述信息用于所述网络对用户设备UE访问应用的路径进行切换。The first sending unit is configured to send the reselected flow description information to the policy and control function PCF; wherein the flow description information is used by the network to switch the path of the user equipment UE accessing the application.
根据权利要求21所述的装置，其中，在所述第一指示信息用于指示所述使用的流量导向方式为多归属流量导向方式的情况下，所述操作模块包括：The device according to claim 21, wherein, in the case that the first indication information is used to indicate that the used traffic directing mode is a multi-homed traffic steering mode, the operation module includes:

第一重选单元，配置为在所述网络对用户设备访问应用的路径进行切换完成后，执行应用重选操作。The first reselecting unit is configured to perform an application reselection operation after the network completes the handover of the path of the user equipment accessing the application.
根据权利要求21所述的装置，其中，在所述第一指示信息用于指示所述使用的流量导向方式为多归属流量导向方式的情况下，所述操作模块包括：The device according to claim 21, wherein, in the case that the first indication information is used to indicate that the used traffic directing mode is a multi-homed traffic steering mode, the operation module includes:

第二发送单元，配置为向所述网络发送所述应用向所述UE提供的服务将会被重定向到新的应用服务器的地址信息；a second sending unit, configured to send, to the network, address information that the service provided by the application to the UE is to be redirected to a new application server;

第一接收单元，配置为接收所述网络提供的通知信息，所述通知消息用于通知所述应用所述UE访问所述应用的路径切换完成；a first receiving unit, configured to receive the notification information provided by the network, where the notification message is used to notify the application that the UE accesses the path switch of the application is completed;

重定向单元，配置为将所述应用向UE提供的服务重定向到所述新的应用服务器的地址。And a redirecting unit configured to redirect the service provided by the application to the UE to an address of the new application server.
一种会话管理功能实体，包括：处理器，所述处理器用于运行程序，其中，所述程序运行时执行权利要求1至7中任一项所述的信息发送方法。A session management function entity, comprising: a processor, wherein the processor is configured to execute a program, wherein the program is executed to execute the information transmission method according to any one of claims 1 to 7.
一种应用层设备，包括：处理器，所述处理器用于运行程序，其中，所述程序运行时执行权利要求8至12中任一项所述的操作执行方法。An application layer device, comprising: a processor for running a program, wherein the program is executed to perform the operation execution method according to any one of claims 8 to 12.
一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行权利要求1至7中任一项所述的信息发送方法；或者，A storage medium, the storage medium comprising a stored program, wherein the program is executed to execute the information transmitting method according to any one of claims 1 to 7; or

所述程序运行时执行权利要求8至12中任一项所述的操作执行方法。The operation execution method according to any one of claims 8 to 12 is executed while the program is running.
一种处理器，所述处理器用于运行程序，其中，所述程序运行时执行权利要求1至7中任一项所述的信息发送方法；或者，A processor for executing a program, wherein the program is executed to execute the information transmitting method according to any one of claims 1 to 7; or

所述程序运行时执行权利要求8至12中任一项所述的操作执行方法。The operation execution method according to any one of claims 8 to 12 is executed while the program is running.