WO2013086917A1 - 会话处理方法及装置 - Google Patents

会话处理方法及装置 Download PDF

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Publication number
WO2013086917A1
WO2013086917A1 PCT/CN2012/084481 CN2012084481W WO2013086917A1 WO 2013086917 A1 WO2013086917 A1 WO 2013086917A1 CN 2012084481 W CN2012084481 W CN 2012084481W WO 2013086917 A1 WO2013086917 A1 WO 2013086917A1
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WIPO (PCT)
Prior art keywords
request message
trusted
network
access gateway
3gpp
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PCT/CN2012/084481
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English (en)
French (fr)
Inventor
刘国燕
朱春晖
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中兴通讯股份有限公司
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Priority to EP12858117.0A priority Critical patent/EP2793530A4/en
Publication of WO2013086917A1 publication Critical patent/WO2013086917A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W12/00Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06Authentication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/08Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0892Network architectures or network communication protocols for network security for authentication of entities by using authentication-authorization-accounting [AAA] servers or protocols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/12Setup of transport tunnels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/30Connection release
    • H04W76/32Release of transport tunnels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04Registration at HLR or HSS [Home Subscriber Server]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10Small scale networks; Flat hierarchical networks
    • H04W84/12WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to the field of communications, and in particular to a session processing method and apparatus.
  • EPS Evolved Packet System
  • 3GPP 3rd Generation Partnership Project
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • HSS User Subscriber Server
  • the EPS supports interworking with a non-3GPP system, wherein interworking with a non-3GPP system is implemented through an S2a/b/c interface.
  • the P-GW acts as an anchor between the 3GPP and the non-3GPP system.
  • non-3GPP system access is divided into untrusted non-3GPP access and trusted non-3GPP access; wherein untrusted non-3GPP access requires an evolved packet data gateway (Evolved Packet Data Gateway,
  • the ePDG is connected to the P-GW.
  • the interface between the ePDG and the P-GW is S2b.
  • the trusted non-3GPP access can be directly connected to the P-GW through the S2a interface.
  • the S2a interface uses Proxy Mobile IPv6.
  • FIG. 2 is a flowchart of a UE accessing an EPC through a trusted WLAN according to the related art.
  • step S202 the UE and the AP/RG perform a non-3GPP specific procedure.
  • step S204 EPA certification.
  • step S206 the L3 attach trigger.
  • step S208 the non-3GPP access network creates a session request to the PDN GW.
  • Step S210 updating the PDN GW address between the PDN GW and the HSS/AAA.
  • Step S212 the PDN GW returns a create session response to the non-3GPP access network.
  • step S214 the L3 attach trigger is completed.
  • the research solution of the SaMOG project is mainly divided into a scheme that has no impact on user equipment (User Equipment, UE for short) and a scheme that affects the UE.
  • the scheme that affects the UE is the 3GPP-specific information such as the access point name (Access Point Name, APN for short) that the UE can support to the mobile core network.
  • APN Access Point Name
  • the related technology mainly triggers the TNAN to create a session to the 3GPP core network PDN GW through an L2 Extensible Authentication Protocol (EAP) message or an L3 message.
  • EAP Extensible Authentication Protocol
  • the Authenticated Authorization and Accounting (AAA) proxy of the WLAN network receives the EAP authentication success message to trigger the access control device (Access Controller, AC for short). Or a Broadband Network Gateway (BNG) that supports the AC function initiates a GPRS Tunneling Protocol (GTP)/PMIP tunnel to the PDN GW.
  • FIG. 3 is a flowchart of detachment triggered by the AAA proxy according to the related art. As shown in FIG. 3, the following steps S302 to S316 are included. Step S302, the UE or the WLAN access network initiates a detach process. Step S304, after receiving the detach message, the WLAN access network initiates a session termination message to the AAA server, and the message may be an accounting termination message.
  • Step S306 after the AAA proxy on the WLAN side senses the session termination message, it sends a WLAN detach request message to the trusted network access gateway.
  • Step S308, the trusted network access gateway deletes the session request.
  • Step S310 updating the PDN GW address between the PDN GW and the HSS/AAA.
  • Step S312, the PCRF initiates an IP-CAN session termination process.
  • Step S314, the PDN GW deletes the session response.
  • Step S316 the trusted network access gateway sends a detach accept message to the AAA proxy. After receiving the detach request message sent by the AAA proxy on the WLAN side, the trusted network access gateway triggers a process of sending a delete session to the PDN GW.
  • the AAA proxy on the WLAN side receives the charging stop message to trigger the trusted network access gateway to initiate a delete GTP/PMIP tunnel to the PDN GW.
  • the AAA proxy triggers the trusted network access gateway to establish/delete the tunnel according to the state of the charging message local to the WLAN network, but for the case where the fixed network and the mobile network are the same carrier, it is possible to trust the network.
  • the access gateway does not send the charging message to the AAA proxy, and uniformly uses the core network charging (usually the core network charging mode does not use the AAA server charging).
  • the AAA proxy on the WLAN side cannot trigger the process of the delete session initiated by the trusted network access gateway to the PDN GW because the accounting termination message is not received.
  • the present invention provides a session processing method and apparatus, to at least solve the problem in the related art that the AAA server cannot notify the trusted network access gateway to delete the session to the PDN GW without using the AAA server for charging.
  • a session processing method including: in a process in which a UE accesses an EPC through a trusted non-3GPP, a non-3GPP access network function entity perceives that the UE authentication succeeds or de-attaches or PDN disconnects The non-3GPP access network function entity notifies the trusted network access gateway to send a setup or delete session request message to the packet data network gateway PDN GW.
  • the non-3GPP access network function entity notifying the trusted network access gateway to send the setup or delete session request message to the PDN GW includes: the non-3GPP access network function entity sends a WTP event request message to the trusted network access gateway, where The WTP event request message is used to notify the trusted network access gateway to establish or delete a session to the PDN GW.
  • the non-3GPP access network function entity sends the WTP event request message to the trusted network access gateway, where the non-3GPP access network function entity sends the WTP event request message to the trusted network access gateway through the pre-established CAPWAP channel. .
  • the non-3GPP access network function entity carries the APN and the MAC address of the UE in the WTP event request message.
  • the non-3GPP access network function entity sends the WTP event request message to the trusted network access gateway, including one of the following: The non-3GPP access network function entity sends a WTP event request message carrying the APN of the UE to the trusted network access gateway in the case that the APN requested by the UE exists in the non-3GPP access network function entity; in the non-3GPP access In the case that the APN requested by the UE does not exist in the network function entity, the non-3GPP access network function entity sends a WTP event request message carrying the default APN to the trusted network access gateway.
  • the non-3GPP access network function entity sends the WTP event request message to the trusted network access gateway, including: non-3GPP The access network function entity sends a WTP event request message carrying the information of the deleted UE to the trusted network access gateway.
  • the method further includes: the non-3GPP access network function entity receives the WTP event response message from the trusted network access gateway, The WTP event response message is used to indicate that the trusted network access gateway establishes or deletes the session successfully with the PDN GW.
  • the method further includes: the WTP event request message is used to notify the trusted network access gateway to request to establish a session to the PDN GW.
  • the non-3GPP access network function entity sends a message to the UE indicating that the extensible authentication protocol EAP is successful.
  • the non-3GPP access network functional entity includes one of the following: an AP, an RG.
  • the trusted network access gateway comprises one of the following: AC, BNG.
  • a session processing apparatus is provided, the apparatus being applicable to a non-3GPP access network functional entity, comprising: a sensing module, configured to access the EPC through the trusted non-3GPP in the UE
  • the UE is authenticated to be successfully authenticated or detached or the PDN is disconnected.
  • the notification module is configured to notify the trusted network access gateway to send a setup or delete session request message to the PDN GW.
  • the notification module includes: a sending submodule, configured to send a WTP event request message to the trusted network access gateway, where the WTP event request message is used to notify the trusted network access gateway to request the PDN GW to establish or delete the session.
  • the sending submodule comprises: a sending unit, configured to send a WTP event request message to the trusted network access gateway by controlling and providing a protocol CAPWAP channel through the pre-established wireless access point.
  • the non-3GPP access network function entity notifies the trusted network access gateway to send a setup or delete session request message to the PDN GW, which solves the problem that the AAA server cannot be used without the AAA server charging in the related art. Notifying the trusted network access gateway of the problem of deleting the session to the PDN GW can make up for the deficiencies in the related art.
  • FIG. 1 is a schematic diagram of a network structure of a 3GPP network interworking with a non-3GPP network according to the related art
  • FIG. 2 is a flowchart of a UE accessing an EPC through a trusted WLAN according to the related art
  • FIG. 3 is a related art according to the related art.
  • FIG. 4 is a flowchart of a session processing method according to an embodiment of the present invention.
  • FIG. 5 is a flow of a UE attaching through a trusted non-3GPP access EPC according to a preferred embodiment of the present invention
  • Figure 6 is a flow chart of de-attachment or PDN de-linking of a UE according to a preferred embodiment of the present invention
  • Figure 7 is a block diagram showing the structure of a session processing apparatus according to an embodiment of the present invention
  • Figure 8 is a block diagram of a preferred embodiment of the present invention
  • FIG. 9 is a structural block diagram 2 of a session processing apparatus according to a preferred embodiment of the present invention
  • FIG. Figure 10 is a block diagram 3 of the structure of a session processing apparatus in accordance with a preferred embodiment of the present invention.
  • FIG. 4 is a flowchart of a session processing method according to an embodiment of the present invention, including the following steps S402 to S404.
  • Step S402 in the process that the UE accesses the EPC through the trusted non-3GPP, the non-3GPP access network function entity perceives that the UE authentication succeeds or de-attaches or the PDN disconnects.
  • Step S404 the non-3GPP access network function entity notifies the trusted network access gateway to send a setup or delete session request message to the PDN GW.
  • the AAA server notifies the trusted network access gateway to establish or delete the session to the PDN GW, but the AAA server cannot perform the above notification without using the AAA server for charging.
  • the foregoing notification is performed by the non-3GPP access network function entity, so that the defects in the related art can be compensated.
  • the non-3GPP access network function entity notifying the trusted network access gateway to send the setup or delete session request message to the packet data network gateway PDN GW comprises: the non-3GPP access network function entity sending the wireless termination to the trusted network access gateway A device WTP event request message, where the WTP event request message is used to notify the trusted network access gateway to request the PDN GW to establish or delete a session.
  • the sending, by the non-3GPP access network function entity, the WTP event request message to the trusted network access gateway comprises: sending, by the non-3GPP access network function entity, the WTP event request message to the trusted network access gateway by using the pre-established CAPWAP channel .
  • the non-3GPP access network function entity carries the APN and the MAC address of the UE in the WTP event request message. It should be noted that carrying the MAC address of the UE in the message ensures that the trusted network access gateway can associate the APN carried by the trusted AP to the specific UE.
  • the non-3GPP access network function entity sends the WTP event request message to the trusted network access gateway, including one of the following: : in the case that there is an APN requested by the UE in the non-3GPP access network functional entity, The non-3GPP access network function entity sends a WTP event request message carrying the APN of the UE to the trusted network access gateway; if the APN requested by the UE does not exist in the non-3GPP access network function entity, the non-3GPP access network The functional entity sends a WTP event request message carrying the default APN to the trusted network access gateway.
  • the non-3GPP access network function entity sends the WTP event request message to the trusted network access gateway, including: non-3GPP The access network function entity sends a WTP event request message carrying the information of the deleted UE to the trusted network access gateway.
  • the method further includes: the non-3GPP access network function entity receives the WTP event response message from the trusted network access gateway, The WTP event response message is used to indicate that the trusted network access gateway establishes or deletes the session successfully with the PDN GW.
  • the method further includes: the WTP event request message is used to notify the trusted network access gateway to request to establish a session to the PDN GW.
  • the non-3GPP access network function entity sends a message to the UE indicating that the EAP is successful.
  • the non-3GPP access network functional entity comprises one of the following: an AP, an RG.
  • the trusted network access gateway comprises one of the following: AC, BNG.
  • the Access Point (AP) or the Residential Gateway (RG) that supports the AP function is the device in the WLAN access network, and the AC/BNG is the trusted network access gateway. .
  • the AP/RG triggers the AC/BNG to initiate a session establishment process to the PDN GW.
  • Preferred embodiment 1 In the first preferred embodiment, when the UE accesses the EPC through the trusted non-3GPP, the AP/RG functions as an EAP authenticator, and can sense the UE attachment and initiate a CAPWAP message to the AC/BNG, so that the AC/BNG triggers.
  • FIG. 5 is a flowchart of a UE attaching through an untrusted non-3GPP access EPC according to a preferred embodiment of the present invention. As shown in FIG. 5, the following steps S502 to S518 are included. Step S502, the UE and the AP/RG perform a non-3GPP specific procedure. In step S504, the AP/RG is an Extensible Authentication Protocol (EAP) Authenticator, and the EAP authentication process is triggered to the UE. If the UE supports the APN information carrying the request, the APN information is carried in the EAP-RES/Identity message to the AC/BNG. If the UE does not support the APN information carrying the request, the HSS carries the default through the AAA server. APN to
  • EAP Extensible Authentication Protocol
  • Step S506 the CAPWAP channel may be established immediately after the AP/RG is powered on, possibly at any time before the step S504. If the CAPWAP channel is not established before the step S504, the CAPWAP channel is established between the AP/RG and the AC/BNG. Process. Step S508: After receiving the EAP authentication success message, the AP/RG sends a Wireless Termination Points (WTP) event request message to the AC/BNG, where the message carries the APN requested by the UE or the default. APN information. The AP/RG must carry the APN requested by the UE if there is an APN requested by the UE.
  • WTP Wireless Termination Points
  • Step S510 After receiving the WTP event request message, the AC/BNG initiates a process of creating a session to the PDN GW, where the AC/BNG carries the APN requested by the UE or the default APN information to the PDN GW. Step S512, the PDN GW may determine, according to a specific policy, whether to allocate an IP address to the UE in the session, and return it to the AC/BNG.
  • the AC/BNG is locally saved as the IP address assigned by the UE; if not allocated, the AC/BNG subsequently receives the route request message or the DHCP request message, and requests the PDN GW by updating the bearer message or other address request message. Assign an IP address.
  • Step S514 after receiving the create session response message, the AC/BNG sends a WTP event response message to the AP/RG.
  • Step S516 After receiving the WTP event response message, the AP/RG sends an EAP success message to the UE.
  • the AP/RG may send an EAP Success message to the UE at any time between steps S504-S516.
  • Step S518 The UE performs an L3 attach completion process.
  • the UE obtains an IP address, specifically an IPv4 type or an IPv6 type, by using an address request message.
  • the address request message may be a DHCPv4 message, or a route request message, or a DHCPv6 message.
  • FIG. 6 is a flowchart of de-attachment or PDN de-linking of a UE according to a preferred embodiment of the present invention. As shown in FIG. 6, the following steps S602 to S616 are included. Step S602, the UE or the WLAN access network may initiate a de-attachment or PDN disconnection procedure. Step S604, because the subscription information of the user is deleted or the user is required to re-authenticate/authorize, etc.,
  • the HSS/AAA may also send a UE Deregistration Request message to the WLAN access network AP/RG.
  • Step S606 After receiving the message of step S602 or S604, the AP/RG sends a WTP event request message to the AC/BNG, where the message carries the information of deleting the UE.
  • Step S608 After receiving the WTP event request message, the AC/BNG initiates a delete session request to the PDN GW according to the information of deleting the UE in the message.
  • the PDN GW replies to the AC/BNG with a delete session response message.
  • Step S612 after receiving the delete session response message, the AC/BNG sends a WTP event response message to the AP/RG.
  • Step S614 if the detach procedure is initiated by the HSS/AAA, the AP/RG sends a UE registration confirmation message to the HSS/AAA.
  • Step S616, the UE performs a non-3GPP resource release procedure.
  • a GTP tunnel is established between the non-3GPP access network element and the PDN GW.
  • the invention is also applicable to the establishment of the PMIP tunnel, and the corresponding message replacement may be performed, for example: proxy binding update message replacement creation
  • the session request message, the proxy binding acknowledgement message replaces the create session response message, and the parameters that need to be added also apply to the PMIP message.
  • FIG. 3 is a structural block diagram of a session processing apparatus according to an embodiment of the present invention, including a sensing module 71 and a first notification module 72. The structure is described in detail below.
  • the sensing module 71 is configured to: in the process of the UE accessing the EPC through the trusted non-3GPP, the UE is successfully authenticated or de-attached or the PDN is disconnected; the first notification module 72 is triggered by the sensing module 71, and is set to notify that The trusted network access gateway sends a setup or delete session request message to the PDN GW.
  • 8 is a block diagram of a structure of a session processing apparatus according to a preferred embodiment of the present invention. As shown in FIG. 8, the first notification module 72 includes a sending submodule 722 configured to send a WTP event request message to a trusted network access gateway. The WTP event request message is used to notify the trusted network access gateway to request the PDN GW to establish or delete the session.
  • FIG. 9 is a block diagram showing the structure of a session processing apparatus according to a preferred embodiment of the present invention.
  • the first sending submodule 722 includes a sending unit 7222, configured to access a trusted network through a pre-established CAPWAP channel.
  • the gateway sends a WTP event request message.
  • FIG. 10 is a block diagram 3 of a structure of a session processing apparatus according to a preferred embodiment of the present invention.
  • the apparatus further includes: a first receiving module 73, configured to receive a WTP event response message from a trusted network access gateway.
  • the WTP event response message is used to indicate that the trusted network access gateway establishes a session with the PDN GW.
  • the sending module 74 is connected to the receiving module 73, and is configured to send a message for indicating that the EAP is successful to the UE.
  • the second receiving module 75 is configured to send a message to the UE. And configured to receive a WTP event response message from the trusted network access gateway, where the WTP event response message is used to indicate that the trusted network access gateway and the PDN GW delete the session successfully.
  • the AP/RG After receiving the WTP event response message from the trusted network access gateway, if the detach procedure is initiated by the HSS/AAA, the AP/RG sends a UE to the HSS/AAA to register the acknowledgment message. Then, the UE performs a non-3GPP resource release procedure.
  • the session processing device described in the device embodiment corresponds to the foregoing method embodiment, and the specific implementation process has been described in detail in the method embodiment, and details are not described herein again.
  • the non-3GPP access network function entity notifies the trusted network access gateway to send an establishment or to the PDN GW.
  • the AAA agent on the WLAN side cannot trigger the trusted network access because the AAA proxy on the WLAN side does not receive the accounting termination message when the core network charging is uniformly adopted in the related art.
  • the gateway initiates a problem of the process of deleting the session to the PDN GW, thereby being able to make up for the defects in the related art.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • 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, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.

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Abstract

本发明公开了一种会话处理方法及装置,该方法包括:在UE通过可信任的非3GPP接入EPC的过程中,非3GPP接入网络功能实体感知UE认证成功或者去附着或者PDN去连接;非3GPP接入网络功能实体通知可信任网络接入网关向PDN GW发送建立或者删除会话请求消息。本发明弥补了相关技术中在统一采用核心网计费时,对于UE发起的去附着流程,WLAN侧的AAA代理因为没有收到计费终止消息,而无法触发可信任网络接入网关向PDN GW发起删除会话的流程的缺陷。

Description

会话处理方法及装
技术领域 本发明涉及通信领域, 具体而言, 涉及一种会话处理方法及装置。 背景技术 第三代合作伙伴计划(3rd Generation Partnership Project, 简称为 3GPP)的演进的 分组系统(Evolved Packet System,简称为 EPS)由演进的通用地面无线接入网(Evolved Universal Terrestrial Radio Access Network,简称为 E-UTRAN)、移动管理单元(Mobility Management Entity, 简称为 MME)、 服务网关 (Serving Gateway, 简称为 S-GW)、 分 组数据网络网关 (Packet Data Network Gateway, 简称为 P-GW) 和归属用户服务器 (Home Subscriber Server, 简称为 HSS) 组成。 图 1是根据相关技术的 3GPP网络与非 3GPP网络互通的网络结构示意图,如图 1 所示, EPS支持与非 3GPP系统的互通, 其中, 与非 3GPP系统的互通通过 S2a/b/c接 口实现, P-GW作为 3GPP与非 3GPP系统间的锚点。 在 EPS的系统架构中, 非 3GPP 系统接入被分为不可信任非 3GPP接入和可信任非 3GPP接入;其中,不可信任非 3GPP 接入需经过演进的分组数据网关(Evolved Packet Data Gateway,简称为 ePDG)与 P-GW 相连, ePDG与 P-GW间的接口为 S2b; 可信任非 3GPP接入可直接通过 S2a接口与 P-GW连接, S2a接口采用代理移动 IP(Proxy Mobile IPv6, 简称为 PMIP)协议进行信 息交互; 另夕卜, S2c接口提供了用户设备 (User Equipment, 简称为 UE) 与 P-GW之 间的用户界面相关的控制和移动性支持, 其支持的移动性管理协议为支持双桟的移动 IPv6 ( Mobile IPv6 Support for Dual Stack Hosts and Routers, 简称为 DSMIPv6), 其可用 于不可信任非 3GPP和可信任非 3GPP接入。 无线局域网络 (Wireless Local Area Network, 简称为 WLAN) 可以作为非 3GPP 系统接入演进的分组核心网 (Evolved Packet Core, 简称为 EPC), 这涉及到很多运营 商关注的固网移动融合的互连互通问题。 图 2 是根据相关技术的 UE 通过可信任的 WLAN接入 EPC的流程图, 如图 2所示, 包括如下的步骤 S202至步骤 S214。 步骤 S202, UE与 AP/RG执行非 3GPP特有的流程。 步骤 S204, EPA认证。 步骤 S206, L3附着触发。 步骤 S208, 非 3GPP接入网向 PDN GW创建会话请求。 步骤 S210, 在 PDN GW和 HSS/AAA之间更新 PDN GW地址。 步骤 S212, PDN GW向非 3GPP接入网返回创建会话响应。 步骤 S214, L3附着触发完成。 目前, 对于 S2b、 S2c接口的流程和策略互通的研究很多, 而对于 S2a接口的研究 很少。 S2a移动性研究 ( Study on S2a Mobility based On GTP & WLAN access to EPC, 简称为 SaMOG) 课题主要是研究 WLAN 作为可信任的非 3GPP 接入网络 (trusted non-3GPP IP access network, 简称为 TNAN), UE通过 S2a接口接入 EPC的互连互通 问题。
SaMOG课题的研究方案主要分为对用户设备 (User Equipment, 简称为 UE) 没 有影响的方案和对 UE有影响的方案。所谓对 UE有影响的方案, 即是 UE可以支持传 递请求的接入点名称 (Access Point Name, 简称为 APN) 等 3GPP特有的信息给移动 核心网。 现阶段, 主要研究的是对 UE没有影响的方案, 相关技术主要是通过 L2可扩展的 认证协议 (Extensible Authentication Protocol, 简称为 EAP) 消息或者 L3消息来触发 TNAN向 3GPP核心网 PDN GW创建会话。其中,对于 L2 EAP消息触发方式, WLAN 网络的验证、 授权和计费服务器 (Authentication Authorization and Accounting, 简称为 AAA) 代理收到 EAP认证成功消息, 来触发接入控制设备 (Access Controller, 简称 为 AC)或支持 AC功能的宽带网络网关(Broadband Network Gateway,简称为 BNG) 向 PDN GW发起建立 GPRS隧道协议 (GPRS Tunnelling Protocol, 简称为 GTP)/PMIP 隧道。 图 3是根据相关技术的 AAA代理触发的去附着流程图, 如图 3所示, 包括如 下的步骤 S302至步骤 S316。 步骤 S302, UE或者 WLAN接入网络发起去附着流程。 步骤 S304, WLAN接入网络接收到去附着消息后, 会向 AAA服务器发起会话终 止的消息, 该消息可以为计费终止消息。 步骤 S306, WLAN侧的 AAA代理感知会话终止消息后, 会向可信任网络接入网 关发送 WLAN去附着请求消息。 步骤 S308, 可信任网络接入网关删除会话请求。 步骤 S310, 在 PDN GW和 HSS/AAA之间更新 PDN GW地址。 步骤 S312, PCRF发起 IP-CAN会话终止流程。 步骤 S314, PDN GW删除会话响应。 步骤 S316, 可信任网络接入网关向 AAA代理发送去附着接受消息。 可信任网络接入网关收到 WLAN侧的 AAA代理发来的去附着请求消息后, 会触 发向 PDN GW发送删除会话的流程。 从上述流程可以看出, WLAN侧的 AAA代理收到计费停止消息, 来触发可信任 网络接入网关向 PDN GW发起删除 GTP/PMIP隧道。 该方案中, AAA代理触发可信 任网络接入网关建立 /删除隧道是依赖于 WLAN网络本地的计费消息的状态, 但是, 对于固网和移动网络为同一运营商的情况, 有可能可信任网络接入网关不会发送计费 消息给 AAA代理, 统一采用核心网计费(通常核心网计费方式不采用 AAA服务器计 费)。 因此, 对于 UE发起的去附着流程或者 PDN去连接流程, WLAN侧的 AAA代 理因为没有收到计费终止消息,而无法触发可信任网络接入网关向 PDN GW发起删除 会话的流程。 发明内容 本发明提供了一种会话处理方法及装置, 以至少解决相关技术中在不采用 AAA 服务器计费的情况下, AAA服务器将无法通知可信任网络接入网关向 PDN GW删除 会话的问题。 根据本发明的一个方面, 提供了一种会话处理方法, 包括: 在 UE通过可信任的 非 3GPP接入 EPC的过程中, 非 3GPP接入网络功能实体感知 UE认证成功或者去附 着或者 PDN去连接;非 3GPP接入网络功能实体通知可信任网络接入网关向分组数据 网络网关 PDN GW发送建立或者删除会话请求消息。 优选的, 非 3GPP接入网络功能实体通知可信任网络接入网关向 PDN GW发送建 立或者删除会话请求消息包括: 非 3GPP接入网络功能实体向可信任网络接入网关发 送 WTP事件请求消息,其中 WTP事件请求消息用于通知可信任网络接入网关向 PDN GW建立或者删除会话。 优选的,非 3GPP接入网络功能实体向可信任网络接入网关发送 WTP事件请求消 息包括: 非 3GPP接入网络功能实体通过预先建立的 CAPWAP信道, 向可信任网络接 入网关发送 WTP事件请求消息。 优选的, 在非 3GPP接入网络功能实体中存在 UE的 APN的情况下, 非 3GPP接 入网络功能实体在 WTP事件请求消息中携带 APN和 UE的 MAC地址。 优选的, 在 WTP事件请求消息用于通知可信任网络接入网关向 PDN GW请求建 立会话的情况下,非 3GPP接入网络功能实体向可信任网络接入网关发送 WTP事件请 求消息包括以下之一:在非 3GPP接入网络功能实体中存在 UE请求的 APN的情况下, 非 3GPP接入网络功能实体向可信任网络接入网关发送携带有 UE的 APN的 WTP事 件请求消息;在非 3GPP接入网络功能实体中不存在 UE请求的 APN的情况下,非 3GPP 接入网络功能实体向可信任网络接入网关发送携带有缺省的 APN的 WTP事件请求消 息。 优选地, 在 WTP事件请求消息用于通知可信任网络接入网关向 PDN GW请求删 除会话的情况下,非 3GPP接入网络功能实体向可信任网络接入网关发送 WTP事件请 求消息包括: 非 3GPP接入网络功能实体向可信任网络接入网关发送携带有删除 UE 的信息的 WTP事件请求消息。 优选的,在非 3GPP接入网络功能实体向可信任网络接入网关发送 WTP事件请求 消息之后,还包括:非 3GPP接入网络功能实体接收到来自可信任网络接入网关的 WTP 事件响应消息, 其中 WTP事件响应消息用于指示可信任网络接入网关与 PDN GW建 立或者删除会话成功。 优选地,在非 3GPP接入网络功能实体接收到来自可信任网络接入网关的 WTP事 件响应消息之后,还包括:在 WTP事件请求消息用于通知可信任网络接入网关向 PDN GW请求建立会话的情况下,非 3GPP接入网络功能实体向 UE发送用于指示可扩展认 证协议 EAP成功的消息。 优选的, 非 3GPP接入网络功能实体包括以下之一: AP、 RG。 优选的, 可信任网络接入网关包括以下之一: AC、 BNG。 根据本发明的另一个方面,提供了一种会话处理装置,该装置可以应用于非 3GPP 接入网络功能实体, 包括: 感知模块, 设置为在 UE通过可信任的非 3GPP接入 EPC 的过程中, 感知 UE认证成功或者去附着或者 PDN去连接; 通知模块, 设置为通知可 信任网络接入网关向 PDN GW发送建立或者删除会话请求消息。 优选的, 通知模块包括: 发送子模块, 设置为向可信任网络接入网关发送 WTP 事件请求消息, 其中 WTP事件请求消息用于通知可信任网络接入网关向 PDN GW请 求建立或者删除会话。 优选的, 发送子模块包括: 发送单元, 设置为通过预先建立的无线接入点控制和 提供协议 CAPWAP信道, 向可信任网络接入网关发送 WTP事件请求消息。 通过本发明, 由非 3GPP接入网络功能实体通知可信任网络接入网关向 PDN GW 发送建立或者删除会话请求消息, 解决了相关技术中在不采用 AAA服务器计费的情 况下, AAA服务器将无法通知可信任网络接入网关向 PDN GW删除会话的问题, 从 而能够弥补相关技术中的缺陷。 附图说明 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: 图 1是根据相关技术的 3GPP网络与非 3GPP网络互通的网络结构示意图; 图 2是根据相关技术的 UE通过可信任的 WLAN接入 EPC的流程图; 图 3是根据相关技术的 AAA代理触发的去附着流程图; 图 4是根据本发明实施例的会话处理方法的流程图; 图 5是根据本发明优选实施例一的 UE通过可信任的非 3GPP接入 EPC附着的流 程图; 图 6是根据本发明优选实施例二的 UE的去附着或者 PDN去连接的流程图; 图 7是根据本发明实施例的会话处理装置的结构框图; 图 8是根据本发明优选实施例的会话处理装置的结构框图一; 图 9是根据本发明优选实施例的会话处理装置的结构框图二; 图 10是根据本发明优选实施例的会话处理装置的结构框图三。 具体实施方式 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。 下面将参考附图并结合实施例来详细说明本发明。 本发明提供了一种会话处理方法。 图 4是根据本发明实施例的会话处理方法的流 程图, 包括如下的步骤 S402至步骤 S404。 步骤 S402, 在 UE通过可信任的非 3GPP接入 EPC的过程中, 非 3GPP接入网络 功能实体感知 UE认证成功或者去附着或者 PDN去连接。 步骤 S404,非 3GPP接入网络功能实体通知可信任网络接入网关向 PDN GW发送 建立或者删除会话请求消息。 相关技术中由 AAA服务器通知可信任网络接入网关向 PDN GW建立或者删除会 话, 但在不采用 AAA服务器计费的情况下, AAA服务器将无法进行上述通知。 本发 明实施例中, 由非 3GPP接入网络功能实体进行上述通知, 从而能够弥补相关技术中 的缺陷。 优选地, 非 3GPP接入网络功能实体通知可信任网络接入网关向分组数据网络网 关 PDN GW发送建立或者删除会话请求消息包括: 非 3GPP接入网络功能实体向可信 任网络接入网关发送无线终止设备 WTP事件请求消息, 其中 WTP事件请求消息用于 通知可信任网络接入网关向 PDN GW请求建立或者删除会话。 优选地,非 3GPP接入网络功能实体向可信任网络接入网关发送 WTP事件请求消 息包括: 非 3GPP接入网络功能实体通过预先建立的 CAPWAP信道, 向可信任网络接 入网关发送 WTP事件请求消息。 优选的, 在非 3GPP接入网络功能实体中存在 UE的 APN的情况下, 非 3GPP接 入网络功能实体在 WTP事件请求消息中携带 APN和 UE的 MAC地址。 需要说明的 是, 在该消息中携带 UE的 MAC地址, 可以保证可信任网络接入网关能关联其携带 的 APN到具体的 UE。 优选地, 在 WTP事件请求消息用于通知可信任网络接入网关向 PDN GW请求建 立会话的情况下,非 3GPP接入网络功能实体向可信任网络接入网关发送 WTP事件请 求消息包括以下之一:在非 3GPP接入网络功能实体中存在 UE请求的 APN的情况下, 非 3GPP接入网络功能实体向可信任网络接入网关发送携带有 UE的 APN的 WTP事 件请求消息;在非 3GPP接入网络功能实体中不存在 UE请求的 APN的情况下,非 3GPP 接入网络功能实体向可信任网络接入网关发送携带有缺省的 APN的 WTP事件请求消 息。 优选地, 在 WTP事件请求消息用于通知可信任网络接入网关向 PDN GW请求删 除会话的情况下,非 3GPP接入网络功能实体向可信任网络接入网关发送 WTP事件请 求消息包括: 非 3GPP接入网络功能实体向可信任网络接入网关发送携带有删除 UE 的信息的 WTP事件请求消息。 优选地,在非 3GPP接入网络功能实体向可信任网络接入网关发送 WTP事件请求 消息之后,还包括:非 3GPP接入网络功能实体接收到来自可信任网络接入网关的 WTP 事件响应消息, 其中 WTP事件响应消息用于指示可信任网络接入网关与 PDN GW建 立或者删除会话成功。 优选地,在非 3GPP接入网络功能实体接收到来自可信任网络接入网关的 WTP事 件响应消息之后,还包括:在 WTP事件请求消息用于通知可信任网络接入网关向 PDN GW请求建立会话的情况下, 非 3GPP接入网络功能实体向 UE发送用于指示 EAP成 功的消息。 优选地, 非 3GPP接入网络功能实体包括以下之一: AP、 RG。 优选地, 可信任网络接入网关包括以下之一: AC、 BNG。 该方案能够弥补相关技术的缺陷, 并且该方案也适用于对 UE有影响的方案。 其 中, 接入点设备(Access Point, 简称为 AP)或者支持 AP功能的家庭网关(Residential Gateway, 简称为 RG) 即为 WLAN接入网络中的设备, AC/BNG即为可信任网络接 入网关。 下面将结合实例对本发明实施例的实现过程进行详细描述。 本发明针对 UE通过可信任的非 3GPP接入 EPC时, 由 AP/RG触发 AC/BNG向 PDN GW发起会话建立 除流程。 优选实施例一 在本优选实施例一中,主要描述了 UE通过可信任的非 3GPP接入 EPC时, AP/RG 作为 EAP认证者,能够感知 UE附着,并向 AC/BNG发起 CAPWAP消息,从而 AC/BNG 触发建立核心网隧道的过程。 图 5是根据本发明优选实施例一的 UE通过可信任的非 3GPP接入 EPC附着的流 程图, 如图 5所示, 包括如下的步骤 S502至步骤 S518。 步骤 S502, UE与 AP/RG执行非 3GPP特有的流程。 步骤 S504, AP/RG作为可扩展的认证协议(Extensible Authentication Protocol, 简 称为 EAP) 认证者, 会向 UE触发 EAP认证流程。 如果 UE支持携带请求的 APN信 息, 则在 EAP响应 /标识 (EAP-RES/Identity) 消息中携带 APN信息给 AC/BNG; 如 果 UE不支持携带请求的 APN信息, 则 HSS通过 AAA服务器携带缺省的 APN给
步骤 S506, AP/RG上电之后可能会马上建立 CAPWAP信道, 可能在步骤 S504 之前的任意时刻; 如果在步骤 S504之前没有建立 CAPWAP信道的话, 那么, AP/RG 和 AC/BNG之间建立 CAPWAP信道流程。 步骤 S508, AP/RG收到 EAP认证成功消息后, AP/RG向 AC/BNG发送无线终 止设备 (Wireless Termination Points, 简称为 WTP)事件请求消息, 该消息中携带 UE 请求的 APN或者缺省的 APN信息。 其中, 如果有 UE请求的 APN的话, 则 AP/RG 必须携带 UE请求的 APN。 另夕卜, 该消息中也需要携带 UE MAC地址, 以使 AC/BNG 能关联其携带的 APN到具体的 UE。 步骤 S510, AC/BNG收到 WTP事件请求消息之后, 会向 PDN GW发起创建会话 的流程, AC/BNG携带 UE请求的 APN或者缺省的 APN信息给 PDN GW。 步骤 S512, PDN GW可以根据具体的策略, 决定是否在该会话中为 UE分配 IP 地址, 并返回给 AC/BNG。 如果分配, 则 AC/BNG本地保存为 UE分配的 IP地址; 如 果不分配, 则 AC/BNG在后续收到路由请求消息或者 DHCP请求消息, 通过更新承载 消息或者其他地址请求消息, 向 PDN GW请求分配 IP地址。 步骤 S514, AC/BNG收到创建会话响应消息之后, 会向 AP/RG发送 WTP事件响 应消息。 步骤 S516, AP/RG收到 WTP事件响应消息之后,会向 UE发送 EAP成功的消息。 可选地, 可能在步骤 S504-S516之间的任意时刻, AP/RG向 UE发送 EAP成功消息。 步骤 S518, UE执行 L3附着完成流程, 在该流程中, UE会通过地址请求消息, 获取 IP地址, 具体为 IPv4类型或者 IPv6类型。 地址请求消息可以为 DHCPv4消息, 或者路由请求消息, 或者 DHCPv6消息。 优选实施例二 本优选实施例二中, 主要是描述 UE通过可信任的非 3GPP接入 EPC后, 实现去 附着或者 PDN去连接的过程。 图 6是根据本发明优选实施例二的 UE的去附着或者 PDN去连接的流程图,如图 6所示, 包括如下的步骤 S602至步骤 S616。 步骤 S602, UE或者 WLAN接入网络可能发起去附着或者 PDN去连接流程。 步骤 S604, 由于用户的签约信息被删除或者要求用户重新认证 /授权等原因,
HSS/AAA也可能会向 WLAN接入网络 AP/RG发送 UE去注册请求消息。 步骤 S606, AP/RG收到步骤 S602或者 S604的消息后, 会向 AC/BNG发送 WTP 事件请求消息, 该消息中携带删除 UE的信息。 步骤 S608, AC/BNG收到 WTP事件请求消息之后,根据消息中删除 UE的信息, 会向 PDN GW发起删除会话请求。 步骤 S610, PDN GW向 AC/BNG回复起删除会话响应消息。 步骤 S612, AC/BNG收到删除会话响应消息之后, 会向 AP/RG发送 WTP事件响 应消息。 步骤 S614,如果该去附着流程是由 HSS/AAA发起的话,则 AP/RG会向 HSS/AAA 发送 UE去注册确认消息。 步骤 S616, UE执行非 3GPP的资源释放流程。 以上优选实施例, 在非 3GPP接入网网元和 PDN GW之间建立的是 GTP隧道, 该发明也适用于 PMIP隧道的建立, 相应的消息替换即可, 比如: 代理绑定更新消息 替换创建会话请求消息, 代理绑定确认消息替换创建会话响应消息, 需要增加的参数 也同样适用于 PMIP消息。 需要说明的是, 在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的 计算机系统中执行, 并且, 虽然在流程图中示出了逻辑顺序, 但是在某些情况下, 可 以以不同于此处的顺序执行所示出或描述的步骤。 本发明实施例提供了一种会话处理装置,该装置可以用于实现上述会话处理方法。 图 Ί是根据本发明实施例的会话处理装置的结构框图,包括感知模块 71和第一通知模 块 72。 下面对其结构进行详细描述。 感知模块 71, 设置为在 UE通过可信任的非 3GPP接入 EPC的过程中, 感知 UE 认证成功或者去附着或者 PDN去连接; 第一通知模块 72, 受到感知模块 71的触发, 设置为通知可信任网络接入网关向 PDN GW发送建立或者删除会话请求消息。 图 8是根据本发明优选实施例的会话处理装置的结构框图一, 如图 8所示, 第一 通知模块 72包括发送子模块 722, 设置为向可信任网络接入网关发送 WTP事件请求 消息, 其中 WTP事件请求消息用于通知可信任网络接入网关向 PDN GW请求建立或 者删除会话。 图 9是根据本发明优选实施例的会话处理装置的结构框图二, 如图 9所示, 第一 发送子模块 722包括发送单元 7222, 设置为通过预先建立的 CAPWAP信道, 向可信 任网络接入网关发送 WTP事件请求消息。 图 10是根据本发明优选实施例的会话处理装置的结构框图三, 如图 10所示, 上 述装置还包括: 第一接收模块 73, 设置为接收来自可信任网络接入网关的 WTP事件 响应消息, 其中 WTP事件响应消息用于指示可信任网络接入网关与 PDN GW建立会 话成功; 发送模块 74, 连接至接收模块 73, 设置为向 UE发送用于指示 EAP成功的 消息;第二接收模块 75,设置为接收来自可信任网络接入网关的 WTP事件响应消息, 其中 WTP事件响应消息用于指示可信任网络接入网关与 PDN GW删除会话成功。 在接收来自可信任网络接入网关的 WTP 事件响应消息之后, 如果该去附着流程 是由 HSS/AAA发起的话,则 AP/RG会向 HSS/AAA发送 UE去注册确认消息。然后, UE执行非 3GPP的资源释放流程。 需要说明的是, 装置实施例中描述的会话处理装置对应于上述的方法实施例, 其 具体的实现过程在方法实施例中已经进行过详细说明, 在此不再赘述。 综上所述, 根据本发明的上述实施例, 提供了一种会话处理方法及装置。 通过本 发明, 由非 3GPP接入网络功能实体通知可信任网络接入网关向 PDN GW发送建立或 者删除会话请求消息, 解决了相关技术中在统一采用核心网计费时, 对于 UE发起的 去附着流程, WLAN侧的 AAA代理因为没有收到计费终止消息, 而无法触发可信任 网络接入网关向 PDN GW发起删除会话的流程的问题,从而能够弥补相关技术中的缺 陷。 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, 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。 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。 凡在本发明的精神和原则之内, 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。

Claims

权 利 要 求 书
1. 一种会话处理方法, 包括:
在用户设备 UE通过可信任的非第三代合作伙伴计划 3GPP接入分组核心 网 EPC的过程中, 非 3GPP接入网络功能实体感知所述 UE认证成功或者去附 着或者分组数据网络 PDN去连接;
所述非 3GPP接入网络功能实体通知可信任网络接入网关向分组数据网络 网关 PDN GW发送建立或者删除会话请求消息。
2. 根据权利要求 1所述的方法, 其中, 所述非 3GPP接入网络功能实体通知可信 任网络接入网关向 PDN GW 发送建立或者删除会话请求消息包括: 所述非 3GPP接入网络功能实体向所述可信任网络接入网关发送无线终止设备 WTP事 件请求消息, 其中所述 WTP事件请求消息用于通知所述可信任网络接入网关 向所述 PDN GW请求建立或者删除会话。
3. 根据权利要求 2所述的方法, 其中, 所述非 3GPP接入网络功能实体向所述可 信任网络接入网关发送 WTP事件请求消息包括:所述非 3GPP接入网络功能实 体通过预先建立的无线接入点控制和提供协议 CAPWAP 信道, 向所述可信任 网络接入网关发送所述 WTP事件请求消息。
4. 根据权利要求 2所述的方法, 其中, 在所述 WTP事件请求消息用于通知所述 可信任网络接入网关向所述 PDN GW请求建立会话的情况下,所述非 3GPP接 入网络功能实体向所述可信任网络接入网关发送 WTP事件请求消息包括以下 之一:
在所述非 3GPP接入网络功能实体中存在所述 UE请求的接入点名称 APN 的情况下, 所述非 3GPP接入网络功能实体向所述可信任网络接入网关发送携 带有所述 UE的 APN的 WTP事件请求消息;
在所述非 3GPP接入网络功能实体中不存在所述 UE请求的 APN的情况下, 所述非 3GPP接入网络功能实体向所述可信任网络接入网关发送携带有缺省的 APN的 WTP事件请求消息。
5. 根据权利要求 2所述的方法, 其中, 在所述 WTP事件请求消息用于通知所述 可信任网络接入网关向所述 PDN GW请求删除会话的情况下,所述非 3GPP接 入网络功能实体向所述可信任网络接入网关发送 WTP事件请求消息包括: 所 述非 3GPP接入网络功能实体向所述可信任网络接入网关发送携带有删除 UE 的信息的 WTP事件请求消息。
6. 根据权利要求 2所述的方法, 其中, 在所述非 3GPP接入网络功能实体向所述 可信任网络接入网关发送 WTP事件请求消息之后,还包括: 所述非 3GPP接入 网络功能实体接收到来自所述可信任网络接入网关的 WTP事件响应消息, 其 中所述 WTP事件响应消息用于指示所述可信任网络接入网关与所述 PDN GW 建立或者删除会话成功。
7. 根据权利要求 6所述的方法, 其中, 在所述非 3GPP接入网络功能实体接收到 来自所述可信任网络接入网关的 WTP事件响应消息之后,还包括:在所述 WTP 事件请求消息用于通知所述可信任网络接入网关向所述 PDN GW请求建立会 话的情况下, 所述非 3GPP接入网络功能实体向所述 UE发送用于指示可扩展 认证协议 EAP成功的消息。
8. 根据权利要求 1至 7中任一项所述的方法, 其中, 在所述非 3GPP接入网络功 能实体中存在所述 UE的接入点名称 APN的情况下, 所述非 3GPP接入网络功 能实体在所述 WTP事件请求消息中携带所述 APN和所述 UE的 MAC地址。
9. 根据权利要求 1至 7中任一项所述的方法, 其中, 所述非 3GPP接入网络功能 实体包括以下之一: 接入点设备 AP、 家庭网关 RG。
10. 根据权利要求 1至 7中任一项所述的方法, 其中, 所述可信任网络接入网关包 括以下之一: 接入控制设备 AC、 宽带网络网关 BNG。
11. 一种会话处理装置, 应用于非第三代合作伙伴计划 3GPP接入网络功能实体, 包括:
感知模块, 设置为在用户设备 UE通过可信任的非 3GPP接入分组核心网 EPC的过程中,感知所述 UE认证成功或者去附着或者分组数据网络 PDN去连 接;
通知模块, 设置为通知可信任网络接入网关向分组数据网络网关 PDN GW 发送建立或者删除会话请求消息。
12. 根据权利要求 11所述的装置, 其中, 所述通知模块包括: 发送子模块, 设置为 向所述可信任网络接入网关发送无线终止设备 WTP事件请求消息, 其中所述 WTP事件请求消息用于通知所述可信任网络接入网关向所述 PDN GW请求建 立或者删除会话。
13. 根据权利要求 12所述的装置, 其中, 所述发送子模块包括: 发送单元, 设置为 通过预先建立的无线接入点控制和提供协议 CAPWAP 信道, 向所述可信任网 络接入网关发送 WTP事件请求消息。
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