CN101730172B - Switching method and device based on access network selection - Google Patents

Switching method and device based on access network selection Download PDF

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CN101730172B
CN101730172B CN 200910148466 CN200910148466A CN101730172B CN 101730172 B CN101730172 B CN 101730172B CN 200910148466 CN200910148466 CN 200910148466 CN 200910148466 A CN200910148466 A CN 200910148466A CN 101730172 B CN101730172 B CN 101730172B
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access
access network
user terminal
network
information
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CN 200910148466
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CN101730172A (en
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周晓云
曲爱妍
毕以峰
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中兴通讯股份有限公司
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Abstract

The invention discloses a switching method based on access network selection, comprising the following steps: a user terminal accessed in an evolution packet system EPS initiates a request for acquiring access network information of the access networks capable of being switched and accessed by the user terminal currently to the access network discovering and selecting function ANDS entity before network switching; the ANDS entity determines the access networks which can be switched and accessed by the user terminal currently for the user terminal and trust information of the access networks, and notifies the user terminal of the access networks which can be switched and accessed by the user terminal and the trust information of the access networks; and the user terminal selects an access network in the access networks capable of being switched and accessed and then is accessed. The invention discloses a switching device based on access network selection simultaneously. Trust information of the accessible access networks is determined before UE is accessed, thus ensuring that the UE service can be smoothly and rapidly accessed after the access network is selected.

Description

基于接入网选择的切换方法与装置 Based on the selected access network switching method and apparatus

技术领域 FIELD

[0001] 本发明涉及多个接入网络之间的切换技术,尤其涉及一种基于接入网选择的切换 [0001] The present invention relates to switching between multiple access network technology, particularly to a handover based on the selected access network

方法与装置。 Method and apparatus.

背景技术 Background technique

[0002]第三代合作伙伴计划(3GPP,3rd Generation Partnership Project)演进的分组系统(EPS,Evolved Packet System)由演进的通用移动通信系统陆地无线接入网(E-UTRAN, Evolved Universal Terrestrial Radio Access Network)、移动管理单兀(MME, Mobility Management Entity)、服务网关(S-GW,ServingGateway)、分组数据网络网关(P-GW 或者PDN Gff, Packet Data NetworkGateway)、归属用户服务器(HSS, Home Subscriber Server)、策略和计费规则功能(PCRF,Policy and Charging Rule Function) 实体及其他支撑节点组成。 [0002] Third Generation Partnership Project (3GPP, 3rd Generation Partnership Project) Evolved Packet System (EPS, Evolved Packet System) of Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio Access network), a mobile management unit Wu (MME, Mobility management Entity), a serving gateway (S-GW, ServingGateway), a packet data network gateway (P-GW or the PDN Gff, packet data NetworkGateway), a home subscriber server (HSS, Home Subscriber Server), policy and charging rules function (PCRF, policy and charging rule function) entity and other supporting nodes.

[0003] 图1是EPS系统架构的组成结构示意图,如图1所示,EPS系统支持与非3GPP系统的互通,其中,与非3GPP系统的互通通过S2a/S2b/S2c接口实现,3GPP与非3GPP系统间的锚点为P-GW。 [0003] FIG. 1 is a structural diagram of the EPS system architecture shown in Figure 1, the system supports interworking with non-3GPP EPS system, wherein the interworking with non-3GPP system S2a / S2b / S2c through interface, with the non-3GPP anchor between 3GPP systems P-GW. 非3GPP系统被分为可信任非3GPP IP接入网和不可信任非3GPP IP接入网。 Non-3GPP system is divided into a trusted non 3GPP IP access networks and untrusted non-3GPP IP access network. 可信任非3GPP IP接入网可直接通过Sh接口与P-GW连接,其支持代理移动IP(PMIP, Proxy Mobile IP)协议和移动IP版本4 (MIPv4)协议。 Trusted non-3GPP IP access network can be connected directly via the Sh interface with the P-GW, which supports Proxy Mobile IP (PMIP, Proxy Mobile IP) and mobile IP protocol version 4 (MIPv4) protocol. 不可信任非3GPP IP接入网需经过演进的分组数据网关(ePDG,Evolved Packet Data Gateway)与P-GW相连,ePDG 与P-GW 间的接口为S2b,其支持PMIP协议。 Untrusted non-3GPP IP access network subject to an evolved packet data gateway (ePDG, Evolved Packet Data Gateway) connected to the P-GW, ePDG and the interface between the P-GW S2b, which supports the PMIP protocol. S2c提供了UE与P-GW之间的用户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栈的移动IPv6(DSMIPv6,Moblie IPv6 Support for Dual Stack Host and Router)。 S2c provides related control and mobility support for a user plane between the UE and the P-GW, which supports mobility management protocol to support a dual stack mobile IPv6 (DSMIPv6, Moblie IPv6 Support for Dual Stack Host and Router).

[0004] 如图1所示,MME负责移动性管理、非接入层信令的处理和用户移动管理上下文的管理等控制面的相关工作;S-GW是与E-UTRAN相连的接入网关设备,在E-UTRAN与P-GW 之间转发数据,并且负责对寻呼等待数据进行缓存;P-GW则是EPS与分组数据网络(PDN, Packet Data Network)的边界网关,负责PDN的接入及在EPS与PDN间转发数据等功能;PCRF实体是策略和计费规则功能实体,它通过接收接口Rx和运营商互联网协议(IP, Internet Protocol)业务网络相连,以获取相应的业务信息,此外,PCRF实体还通过foc/ foca/Gxc接口与网络中的网关设备相连,负责发起IP承载的建立,保证业务数据的服务质量(QoS, Quality of Service),并进行计费控制。 [0004] 1, the MME is responsible for mobility management, work-related non-access layer control plane signaling and user handling mobility management context management; S-GW is an access gateway connected to the E-UTRAN are forwarded between E-UTRAN and the P-GW data, and is responsible for paging waiting data caching; P-GW is the EPS packet data network (PDN, packet data network) border gateway, a PDN connection is responsible and the forwarding data between the EPS and the PDN functions; and the PCRF entity is a policy charging rule function, it (IP, Internet protocol) services connected to a network, to obtain the corresponding service information by receiving the operator Rx and Internet protocol interface, further, the PCRF entity through the gateway device foc / foca / Gxc interface connected to the network, is responsible for initiating the establishment of IP bearer, quality assurance (QoS, quality of service) service data services, and charging control.

[0005] 在现有的EPS系统中应用了接入网发现和选择功能(ANDSF,AccessNetwork Discovery and Selection Function)实体,ANDSF实体包括数据管理和控制功能,其作用是可以根据运营商策略提供网络发现与选择的辅助数据。 [0005] Application of the conventional EPS system, the Access Network Discovery and Selection Function (ANDSF, AccessNetwork Discovery and Selection Function) entity, the ANDSF entity comprises data management and control functions, its role is to provide network discovery according to operator policy auxiliary data selection. ANDSF实体提供有两种信息,分别为系统间移动策略和接入网络发现信息。 Two ANDSF entity provides information, respectively, for the discovery information intersystem mobility policies and access networks. 根据运营商的需求,ANDSF实体可以同时提供前述两种信息或者其中的任一种信息。 According to the operator's needs, ANDSF entity may provide any information or wherein the two types of information simultaneously.

[0006] 图2为ANDSF实体的应用结构示意图,如图2所示,用户终端(UE)通过3GPP接入网/非3GPP接入网以及S14接口接入ANDSF实体,其中,S14接口为3GPP接入网/非3GPP接入网与ANDSF实体之间的接口,S14接口支持PULL和PUSH模式。 [0006] FIG. 2 is a schematic structural applications ANDSF entity, shown in Figure 2, the user terminal (UE) via the access network 3GPP / non-3GPP access and the S14 interface access ANDSF entity, wherein, S14-3GPP access interface the interface between the access network / non-3GPP access and ANDSF entity, S14 and interface supports PUSH PULL mode. 其中的PULL模式是UE 向网络进行主动申请,触发ANDSF实体向UE发送网络信息。 PULL mode in which the UE is actively apply to the network, triggering ANDSF entity sends network information to the UE. 而PUSH模式主要是由网络主动触发向UE发送数据。 The PUSH mode is mainly active trigger to send data to the UE by the network.

[0007] 根据现有技术,UE可以通过非3GPP接入网接入EPS,而非3GPP接入网又分为可信任的3GPP接入网和不可信任的非3GPP接入网。 [0007] According to the prior art, UE can access non-3GPP access EPS, rather than divided into 3GPP access network, non-3GPP access and trusted non-3GPP access network trusted. 非3GPP接入网对UE的所归属EPS网络是否是信任的,主要取决于两个网络的运营商是否达成签约协议。 Whether non-3GPP access network belongs EPS UE is trusted, depending on whether the two network operators to reach a contract agreement. 而在现有技术中,如图1所示,归属EPS网络对信任的非3GPP接入网是可以进行动态资源与计费控制的,通过foca 口传递策略和计费控制(PCC,Policy and Charging Control)策略;而对不可信任的非3GPP 接入网无法进行动态资源和计费控制。 In the prior art, shown in Figure 1, the EPS network to the home non-3GPP access is trusted dynamic resource control and charging, transfer policy and charging control (PCC, Policy and Charging port through foca control) strategy; while the untrusted non-3GPP access network resources can not be dynamic and charging control.

[0008] 根据现有技术,UE在接入可信任的非3GPP接入网时,可以直接发起附着请求,然后是用户接入认证过程,随后建立PDN连接,完成附着;但是当UE选择了一个不可信任的非3GPP接入网接入时,由于UE并不知道该接入网是否是可信任的,那么UE将会先到该接入网中进行接入认证,在接入认证过程中,网络侧告知终端当前接入网是不可信任的,然后UE 再从该接入网选择ePDG,按照不可信任的接入网的接入方式再发起接入请求;这样就因为UE不知道接入网的信任信息,存在一个“试验”接入的过程,对切换效率和业务连续性是不利的。 [0008] According to the prior art, when the UE access a trusted non-3GPP access may be initiated directly attach request, then the user access authentication procedure, and then establishing a PDN connection, complete adhesion; but when the UE selects a when not trusted non-3GPP access network access, since the UE does not know whether the access network is trusted, then the UE will be the first to access network access authentication, access authentication, the network side to notify the terminal of the current access network is not trusted, the ePDG and UE select the access network, in accordance with the access untrusted access network re-access request; so because the UE does not know the access network the trust information, there is a "test" the process of access, switching efficiency and business continuity is a disadvantage. 而如果UE在向一个接入网接入时知道该接入网是可信任的接入网或是不可信任的接入网,特别是当UE知道所接入的接入网是可信任的接入网时,直接选择ePDG建立II^sec 隧道,进行业务接入即可。 If a UE knows when the access network to access the access network is trusted or untrusted access network the access network, especially when the UE is aware that the access is trusted access network connection when the network to directly select ePDG establish II ^ sec tunnel, access to conduct business.

[0009] UE在向非3GPP接入网切换时,是希望知道当前区域有无线信号覆盖的几个网络是否是可信任的或者是不可信任的,这样UE可以选择自己最希望接入网络接入。 [0009] When UE handover to non-3GPP access, there is a wish to know whether the current wireless coverage area of ​​several networks is trusted or not trusted, so that the UE can choose the most desirable of a network access . 目前,由于网络融合技术尚处于讨论阶段,并没有解决前述问题的相关技术方案。 Currently, due to network convergence technology is still in the discussion stage, and no relevant technical solutions to the aforementioned problems.

发明内容 SUMMARY

[0010] 有鉴于此,本发明的主要目的在于提供一种基于接入网选择的切换方法与装置, 在UE进行网络切换时能及时通知UE当前能接入的接入网的信任信息,使UE更快捷地接入到所选择的接入网。 [0010] In view of this, the main object of the present invention is to provide a handover method and apparatus based on the selected access network can notify the access network to trust information of the current UE can access the network when handover UE, so UE to more quickly access the selected access network.

[0011] 为达到上述目的,本发明的技术方案是这样实现的: [0011] To achieve the above object, the technical solution of the present invention is implemented as follows:

[0012] 一种基于接入网选择的切换方法,包括: [0012] An access network selection method based on switching, comprising:

[0013] 已接入演进的分组系统EPS中的用户终端进行网络切换前,向接入网发现和选择功能ANDSF实体发起获取所述用户终端当前能切换接入的接入网络信息的请求; Before the [0013] user terminal has access to an evolved packet system EPS in a switching network, to the access network discovery and selection function ANDSF entity initiating the request for acquiring the access network information of the current user terminal can access to the switch;

[0014] 所述ANDSF实体为所述用户终端确定出所述用户终端当前能切换接入的接入网络及其信任信息,并将所述用户终端能切换接入的接入网络及其信任信息通知所述用户终端;以及 [0014] The ANDSF entity is the user terminal determines that an access network of the current user terminal can access and switching trust information, and the user can switch the access terminal to the access network information and trust notifying the user terminal; and

[0015] 所述用户终端在能切换接入的接入网络中选择接入网络并接入。 [0015] The user terminal can select an access network in the access network handover access and access.

[0016] 优选地,将所述用户终端能切换接入的接入网络及其信任信息通知所述用户终端,包括: [0016] Preferably, the user can switch the access terminal and the access network notifying the user terminal trust information, comprising:

[0017] 所述ANDSF实体接收到所述用户终端的请求后,将可信任接入网络及其信任信息,或/和非信任接入网络及其信任信息通知所述用户终端。 After [0017] The ANDSF entity receives the request from the user terminal, and trust the trusted access network information, and / or non-trusted and trusted access network notifying the user terminal information.

[0018] 优选地,所述用户终端向所述ANDSF实体发起的获取能切换接入的接入网络信息的请求中,还携带有所获取接入网络是可信任接入网络或是非信任接入网络的指示信息。 [0018] Preferably, the request initiated by the user terminal to the ANDSF entity can obtain access network handover access information, has acquired the access network further carry the access network is trusted or non-trusted access information indicating the network.

[0019] 优选地,所述ANDSF实体接收到所述用户终端的请求后,将所述用户终端请求接入的可信任接入网络及其信任信息,或非信任接入网络及其信任信息通知所述用户终端。 [0019] Preferably, the trusted access network of the ANDSF entity, after receiving the request from the user terminal, the user terminal requesting access and trust information, trusted or untrusted access network information and the notification the user terminal.

[0020] 优选地,所述ANDSF实体中存储有所述用户终端归属网络与当前能切换接入的各网络之间的信任关系。 [0020] Preferably, the ANDSF entity is stored in the user terminal belongs to a trust relationship between the current network and each network switch can be accessed.

[0021] 一种基于接入网选择的切换装置,包括: [0021] A handoff access device based on the selected network, comprising:

[0022] 发送单元,用于在已接入EPS中的用户终端进行网络切换前,向ANDSF实体发送获取所述用户终端当前能切换接入的接入网络信息的请求; The user terminal before [0022] transmitting unit, configured to have access to the EPS network handover ANDSF entity transmits to obtain the access network information requesting the current user terminal can access to the switch;

[0023] 确定单元,用于为所述用户终端确定出所述用户终端当前能切换接入的接入网络及其信任信息; [0023] determination means for determining that the user terminal to the access network the user access terminal can switch its current trust information;

[0024] 通知单元,用于将所述用户终端能切换接入的接入网络及其信任信息通知所述用户终端;以及 [0024] notification means for accessing the network user terminal can handoff access and trust information notifying the user terminal; and

[0025] 选择接入单元,用于在所述用户终端能切换接入的接入网络中选择接入网络并接入。 [0025] The access selection means for selecting an access network in the user terminal can access the access network switching and access.

[0026] 优选地,所述通知单元将可信任接入网络及其信任信息,或/和非信任接入网络及其信任信息通知所述用户终端。 [0026] Preferably, the notification unit and trust the trusted access network information, and / or non-trusted and trusted access network notifying the user terminal information.

[0027] 优选地,所述用户终端向所述ANDSF实体发起的获取能切换接入的接入网络信息的请求中,还携带有所获取接入网络是可信任接入网络或是非信任接入网络的指示信息。 [0027] Preferably, the request initiated by the user terminal to the ANDSF entity can obtain access network handover access information, has acquired the access network further carry the access network is trusted or non-trusted access information indicating the network.

[0028] 优选地,所述通知单元将所述用户终端请求接入的可信任接入网络及其信任信息,或非信任接入网络及其信任信息通知所述用户终端。 [0028] Preferably, the notification unit of the user terminal requests access to a trusted network access and trust information, trusted or untrusted access network and notifying the user terminal information.

[0029] 优选地,所述ANDSF实体中存储有所述用户终端归属网络与当前能切换接入的各网络之间的信任关系。 [0029] Preferably, the ANDSF entity is stored in the user terminal belongs to a trust relationship between the current network and each network switch can be accessed.

[0030] 本发明的ANDSF实体在接收到UE的获取当前所能切换接入的接入网络信息的请求,根据UE所处的位置信息,确定UE所能接入的接入网信息,并确定UE所能接入的接入网与UE归属网络的信任信息,即确定哪些接入网对UE所属的接入网而言是可信任的,而哪些又是不可信任的,UE根据所能接入的接入网的信任信息情况进行接入网选择并切换接入。 [0030] ANDSF entity according to the present invention in the received acquisition request to the UE access network information can be the current handover access, the UE is located according to the location information, the UE determines the access network can access the information, and determines trust information access network and the UE can access the home network of the UE, i.e., for purposes of determining which access network the UE belongs to the access network is trusted, and which is not trusted, can be connected according to the UE trust information where the access network is an access network selection and handover access. 由于UE在接入之前已确定了所能接入的接入网的信任信息,因此,在选择了接入网后,将能保证UE顺利快捷的切换接入,并保证了UE上业务的实时性和连续性。 Since the UE has identified trust before access can access the information of the access network, therefore, after selecting the access network, will be able to ensure the smooth and efficient handover UE access and to ensure the real-time service on the UE and continuity. 本发明方案实现简单且实用。 Embodiment of the present invention is to achieve simple and practical.

附图说明 BRIEF DESCRIPTION

[0031] 图1是EPS系统架构的组成结构示意图; [0031] FIG. 1 is a structural diagram of a system architecture of the EPS;

[0032] 图2为ANDSF实体的应用结构示意图; [0032] FIG. 2 is a schematic diagram of the application structure ANDSF entity;

[0033] 图3为本发明UE从ANDSF实体获取接入网信任关系信息的流程图; [0033] The present invention is a flow chart of FIG. 3 UE access network information acquired from a trust relationship ANDSF entity;

[0034] 图4为UE从ANDSF实体获取可信任接入网列表的流程图; [0034] FIG 4 is a flowchart of a list of trusted access network entity UE obtained from ANDSF;

[0035] 图5为UE从ANDSF实体获取不可信任接入网列表的流程图; [0035] FIG. 5 is a flowchart illustrating the UE obtains the access network from the list of untrusted ANDSF entity;

[0036] 图6为应用本发明方案后UE向非3GPP接入系统的切换流程图; [0036] FIG 6 is a flowchart of handover UE to a non-3GPP access system of the present invention is applied;

[0037] 图7为本发基于接入网选择的切换装置的组成结构示意图。 [0037] FIG. 7 is a schematic structural composition based access network switching device selected by the present hair. 具体实施方式 Detailed ways

[0038] 本发明的ANDSF实体在接收到UE的获取当前所能切换接入的接入网络信息的请求,根据UE所处的位置信息,确定UE所能接入的接入网信息,并确定UE所能接入的接入网与UE归属网络的信任信息,即确定哪些接入网对UE所属的接入网而言是可信任的,而哪些又是不可信任的,UE根据所能接入的接入网的信任信息情况进行接入网选择并切换接入。 [0038] ANDSF entity according to the present invention in the received acquisition request to the UE access network information can be the current handover access, the UE is located according to the location information, the UE determines the access network can access the information, and determines trust information access network and the UE can access the home network of the UE, i.e., for purposes of determining which access network the UE belongs to the access network is trusted, and which is not trusted, can be connected according to the UE trust information where the access network is an access network selection and handover access. 由于UE在接入之前已确定了所能接入的接入网的信任信息,因此,在选择了接入网后,将能保证UE顺利快捷的切换接入,并保证了UE上业务的实时性和连续性。 Since the UE has identified trust before access can access the information of the access network, therefore, after selecting the access network, will be able to ensure the smooth and efficient handover UE access and to ensure the real-time service on the UE and continuity. 本发明方案实现简单且实用。 Embodiment of the present invention is to achieve simple and practical.

[0039] 为使本发明的目的、技术方案和优点更加清楚明白,以下举实施例并参照附图,对本发明进一步详细说明。 [0039] To make the objectives, technical solutions, and advantages of the present invention will become apparent from the following embodiments and with reference to the accompanying drawings, the present invention is further described in detail.

[0040] 实施例一 [0040] Example a

[0041] 图3为本发明UE从ANDSF实体获取接入网信任关系信息的流程图,如图3所示, UE通过S14接口拜访ANDSF实体,并采用PULL模式向EPS网络进行主动申请可接入的接入网的信息,触发ANDSF实体向UE发送网络信息。 [0041] FIG 3 for a flow chart the UE access network information from a trust relationship ANDSF entity, shown in Figure 3, the UE visiting ANDSF entity by the interface of the present invention, S14, and using PULL mode to the EPS network accessible application active access network information, network information to trigger ANDSF entity sends to the UE. ANDSF实体中存储有UE归属网络与当前能切换接入的各接入网络之间的信任关系。 ANDSF entity stores a trust relationship between the home network and the UE each can be switched access network currently accessed. 其中的信任关系是根据UE所归属的网络的运营商与某接入网络运营商之间是否签署了信任关系的协议而确定的,如果UE所归属的网络的运营商与某接入网络的运营商之间签署了信任关系的协议,则UE归属网络与该接入网络之间的关系被配置为可信任关系,否则被配置为不可信任的关系。 Which is whether or not the trust relationship between the signing of an access network operators and according to the operator UE belongs to a network of trust relationships protocol determined, belongs to a network of operators to access the network operator if the UE an agreement signed between the business trust relationship, then the relationship between the UE's home network and the access network is configured as a trusted relationship, or be configured relationship can not be trusted. 具体包括如下步骤: It includes the following steps:

[0042] 步骤301 =UE向ANDSF实体发送“接入网消息请求”信令,请求ANDSF实体返回当前UE所在位置可以接入的接入网的ID及其与UE归属网络的信任关系。 [0042] Step 301 = UE sends a "request to the access network message" signaling to the ANDSF entity, requesting ANDSF entity returns the current location of the access network where the UE ID can access its trust relationship with the home network of the UE. “接入网消息请求” 中还携带有UE所在位置的信息。 "Access Network Message Request" further carries the position information of UE is located. ANDSF实体根据UE当前所在位置的信息,确定该区域的所有覆盖网络的信息,并确定这些网络的网络标识及与UE当前所接入的接入网之间的信任关系。 ANDSF entity of the UE current location information, the information of all overlay network region is determined, and determining the trust relationship between the network identifier and the network currently accessed by the UE access network. 如图3中的“可以接入的接入网列表”项中所示的,将网络标识(网络名称或编号等信息)及该接入网信任与否的信息确定出来。 In FIG. 3 (network information like the name or number) "access network may access a list of" network identification information shown in the entries in the access network and determines whether or not trust it.

[0043] 步骤302 =ANDSF实体向UE返回“接入网消息应答”信令,该消息中携带了UE所在位置可以接入的接入网的ID及其与UE归属网络的信任关系,供UE切换时选择接入网参考。 [0043] Step 302 = ANDSF entity returns "access network message response" signaling to the UE, where the message carries the trust relationship between the position where the UE may access the access network and the UE ID of the home network for UE selecting a reference when switching access network. 即将图中所示的“可以接入的接入网列表”项通知UE。 "Access network may access list" item in FIG upcoming notification UE.

[0044] 需要说明的是,在接收到“接入网消息请求”信令时,ANDSF实体也可以仅向UE返回可信任接入网ID及其信任信息,即默认UE所请求的接入网是可信任接入网。 [0044] Note that, upon receiving the "request message the access network," signaling, the ANDSF entity may only return to the trusted access network to the UE ID and the trust information, i.e., the default request of the UE access network It is a trusted access network. 或者,在接收到“接入网消息请求”信令时,ANDSF实体也可以仅向UE返回非信任接入网ID及其信任信息,即默认UE所请求的接入网是非信任接入网。 Alternatively, when receiving the "request message the access network," signaling, the ANDSF entity may return only untrusted access network to the UE ID and the trust information, the default access network is trusted access network requested by the UE.

[0045] 实施例二 [0045] Second Embodiment

[0046] 图4为UE从ANDSF实体获取可信任接入网列表的流程图,如图4所示,UE通过S14 接口拜访ANDSF实体,采用PULL模式向网络进行主动申请可接入的接入网的信息,并携带“可信任接入网”的指示信息,触发ANDSF实体向UE发送可信任接入网列表,ANDSF实体收到该信令后,从当前可以接入的接入网列表中筛选出可信任的接入网列表返回给UE。 [0046] FIG 4 is a flowchart illustrating the UE obtains the access network from a list of trusted ANDSF entity, 4, UE visiting ANDSF entity S14 interface PULL mode using active application access network accessible to the network information, and carries a "trusted access network" indication information, triggering ANDSF entity sends a list of trusted access network to the UE, after receiving the signaling ANDSF entity, screened from the current access network can access the list of a list of trusted access network is returned to the UE. 具体包括如下步骤: It includes the following steps:

[0047] 步骤401 :UE向ANDSF实体发送“接入网消息请求”信令,并携带“可信任接入网” 的指示信息,请求ANDSF实体返回当前UE所在位置可以接入的可信任的接入网的列表。 [0047] Step 401: UE sends ANDSF entity "message requesting the access network," signaling, and carries a "trusted access network," the indication information requesting ANDSF entity returns the current location of the UE may access the location of the trusted access a list of networks. “接入网消息请求”中还携带有UE所在位置的信息。 "Access Network Message Request" further carries the position information of UE is located. ANDSF实体为UE确定可信任接入网的信息,如图4中的“可以接入的可信任的接入网列表”项,包括可信任的接入网的标识信息(网络名称或编号等信息),以及“可信任的”标识信息。 Trusted access network information is determined ANDSF entity is a UE, FIG. 4, "a list of trusted access network that can be accessed" item, includes identification information of the trusted access network, and the like (network name or ID information ), and identification information "trusted."

[0048] 步骤402 =ANDSF实体收到指示后,从当前可以接入的接入网列表中筛选出可信任的接入网,通过“接入网消息应答”信令,返回给UE,供UE切换时选择接入网参考。 [0048] Step 402 = ANDSF entity after receiving the indication, the current filter from the list of access network that can be accessed in a trusted access network, the "access network response message" signaling is returned to the UE, for the UE to selecting a reference when switching access network. 即将图中所示的“可以接入的可信任的接入网列表”项通知UE。 Shown in FIG soon "may access a list of trusted access network" item notification UE.

[0049] 实施例三 [0049] Example three

[0050] 图5为UE从ANDSF实体获取不可信任接入网列表的流程图,如图5所示,UE通过S14接口拜访ANDSF实体,采用PULL模式向网络进行主动申请可接入的接入网的信息,并携带“不可信任接入网”的指示信息,触发ANDSF实体向UE发送不可信任接入网列表,ANDSF 实体收到该信令后,从当前可以接入的接入网列表中筛选出不可信任的接入网列表返回给UE。 [0050] FIG. 5 is a flowchart illustrating the UE acquires a list of untrusted access network from the ANDSF entity, shown in Figure 5, call ANDSF entity UE S14 interface PULL mode using active application access network accessible to the network information and carry "untrusted access networks," the instructions, triggers ANDSF entity sends untrusted network access list to the UE, after ANDSF entity receives the signaling, screening from the list of current access network that can be accessed in a list of the access network can not be trusted to return to the UE. 具体包括如下步骤: It includes the following steps:

[0051] 步骤501 :UE向ANDSF实体发送“接入网消息请求”信令,并携带“不可信任接入网”的指示,请求ANDSF实体返回当前UE所在位置可以接入的不可信任的接入网的列表; “接入网消息请求”中还携带有UE所在位置的信息。 [0051] Step 501: UE sends ANDSF entity "message requesting the access network," signaling, and carries the indication "untrusted access network", the access request ANDSF entity returns the current location of the UE can not be trusted location that can be accessed net list; "message requesting the access network" further carries the position information of UE is located. ANDSF实体为UE确定不可信任接入网的信息,如图5中的“可以接入的不可信任的接入网列表”项,包括可信任的接入网的标识信息(网络名称或编号等信息),以及“不可信任的”标识信息。 ANDSF entity UE determines untrusted access network information, as shown in the 5 'to access a list of access network may not be trusted "item, a trusted access network identification information (network name or ID information ), as well as "untrustworthy" identifying information.

[0052] 步骤502 =ANDSF实体收到指示后,从当前可以接入的接入网列表中筛选出不可信任的接入网,通过“接入网消息应答”信令,返回给UE,供UE切换时选择接入网参考。 [0052] Step 502 = ANDSF entity after receiving the indication, the current filter from the list of access network that can be accessed in an untrusted access network, the "access network response message" signaling is returned to the UE, for the UE to selecting a reference when switching access network. 即将图中所示的“可以接入的不可信任的接入网列表”项通知UE。 "List the access network can access the untrusted" will be shown in the figure on notification UE.

[0053] 实施例四 [0053] Fourth Embodiment

[0054] 图6为应用本发明方案后UE向非3GPP接入系统的切换流程图,如图6所示,UE切换的流程包括以下步骤: After [0054] FIG. 6 is applied to switch the UE to the embodiment of the present invention the non-3GPP access system to a flow chart shown in Figure 6, UE handover comprises the following steps:

[0055] 步骤601 =UE已经通过3GPP接入系统接入到EPS。 [0055] Step 601 = UE has accessed to EPS system via a 3GPP access. 当然发生场景也可能是UE已经通过非3GPP接入系统接入到EPS,因为后续操作类似,在此不做单独描述。 Of course, it may happen that the UE has scene through the non-3GPP access system to access the EPS, as similar to the subsequent operation, which is not described separately.

[0056] 步骤602 =UE因为某种原因需要发起切换,例如当前接入网络的无线信号强度不能支撑当前业务等原因。 [0056] Step 602 = UE needs to initiate a handover for some reason, such as the current wireless signal strength of the access network can not support the current service and other reasons.

[0057] 步骤603 :UE通过S14接口拜访ANDSF实体,获取可以接入的接入网名单(获取方式参见图4),并选择一个接入网发起切换附着,由于ANDSF实体提供的接入网络名单中包含可接入网与UE归属网络的信任关系,所以UE可以选择接入哪个网络。 [0057] Step 603: UE call via an interface S14 ANDSF entity, acquiring the list of access networks that can be accessed (see FIG. 4 acquisition mode), and select the access network initiates a handover is attached, since the network access entity lists ANDSF contains a trust relationship network and can be accessed by UE home network, the UE can select which network access.

[0058] 一般情况下,为了保证为业务提供合理的QoS保证和准确合理的计费,UE会首选可信任的3GPP接入网接入;UE已知该接入网是信任的或者是不信任的。 [0058] In general, in order to ensure accurate and reasonable QoS guarantee a proper charging for the service, the UE will be the preferred trusted 3GPP access network access; access network the UE is known in the trust or not trust of.

[0059] 步骤604 :确定UE所选择的接入网是可信任的接入网还是不可信任的接入网,如果所选择的是可信任的接入网,执行步骤605,否则执行步骤60fe。 [0059] Step 604: determining the selected UE access network access network is trusted or untrusted access networks, if the choice is trusted access network, step 605 is executed, otherwise step 60fe.

[0060] 步骤605 =UE按照可信任的接入网的接入方式完成鉴权流程。 [0060] Step 605 = UE to complete the authentication process according to the access mode trusted access network.

[0061] 步骤60¾ :UE按照不可信任的接入网的接入方式接入。 [0061] Step 60¾: UE access according to access untrusted access network. 首先,UE需要为当前的接入寻找一个ePDG。 First, UE need to find a ePDG for the current access.

[0062] 步骤605b =UE和ePDG之间建立IPsec隧道。 [0062] Step 605b = establishing an IPsec tunnel between the UE and the ePDG.

[0063] 步骤605c =UE的接入认证完成。 [0063] Step 605c = UE access authentication is completed. [0064] 步骤606 :切换流程的后续步骤,比如PMIP隧道的切换,PCC会话的刷新与重建等。 [0064] Step 606: the subsequent steps of the handover procedure, such as switching the PMIP tunnel, refresh and reconstruction PCC session. 步骤606中的PMIP隧道的切换、PCC会话的刷新与重建等均为现有技术,也不是本发明技术方案的重点,这里不作赘述。 PMIP tunnel switching in step 606, and flushes the like are reconstructed PCC session prior art, not the focus aspect of the present invention, will not be repeated herein.

[0065] 步骤607 :切换完成。 [0065] Step 607: the handover is completed. UE通过非3GPP接入系统接入EPS。 UE accesses the EPS system through the non-3GPP access.

[0066] 图7为本发基于接入网选择的切换装置的组成结构示意图,如图7所示,本发基于接入网选择的切换装置包括发送单元70、确定单元71、通知单元72和选择接入单元73, 其中,发送单元70用于在已接入EPS中的用户终端进行网络切换前,向ANDSF实体发送获取所述用户终端当前能切换接入的接入网络信息的请求;确定单元71用于为所述用户终端确定出所述用户终端当前能切换接入的接入网络及其信任信息;通知单元72用于将所述用户终端能切换接入的接入网络及其信任信息通知所述用户终端;选择接入单元73用于在所述用户终端能切换接入的接入网络中选择接入网络并接入。 [0066] Figure 7 is a structure diagram of an access network switching device based on the selected hair, shown in Figure 7, the present invention is based on the selected access network switching apparatus includes a transmission unit 70, determination unit 71, and notification unit 72 selecting the access unit 73, sending unit 70 for the user terminal has accessed the EPS network handover pre, ANDSF entity sends a request for acquiring the access network information of the current user terminal can access to the switch; determining unit 71 is used for the user terminal determines that an access network of the current user terminal can access and switching trust information; notification unit 72 for user access to the network and the access terminal can switch trust Notify the user terminal; selecting an access unit 73 for selecting an access network in an access network the user terminal can access and handover access. 所述用户终端向所述ANDSF实体发起的获取能切换接入的接入网络信息的请求中,还携带有所获取接入网络是可信任接入网络或是非信任接入网络的指示信息,以及所述用户终端的位置信息。 The access network information requesting handoff access can be initiated by a user terminal to acquire the ANDSF entity, it is also carries some indication information acquiring access network is a trusted or non-trusted access network the access network, and the location information of the user terminal. 所述ANDSF实体根据所述用户终端的位置信息确定所述用户终端当前能切换接入的接入网络信息。 The ANDSF entity determines that the current user terminal can access the access network switching information based on location information of the user terminal. 所述ANDSF实体中存储有所述用户终端当前接入的接入网络与各接入网络之间的信任关系。 The ANDSF entity trust relationship between the user terminal stores the access network currently accessed by the respective access network.

[0067] 本领域技术人员应当理解,图7所示的基于接入网选择的切换装置是为实现前述的基于接入网选择的切换方法而设置的,图中的各处理单元的实现功能可参照前述实施例一至实施例四中的相关描述而理解。 [0067] It should be understood by those skilled in the art will realize functions of each processing unit in FIG selection based on the access network switching apparatus for the realization of the method of switching access network based on the selected set of FIG. 7 may be a reference to the foregoing embodiment related to the fourth embodiment described and understood. 图7所示的装置中各单元的功能可通过运行于处理器上的程序而实现,也可通过具体的逻辑电路而实现。 Device shown in FIG 7 functions of each unit may be realized by the program running on a processor, it can also be achieved by a specific logic circuit.

[0068] 以上所述,仅为本发明的较佳实施例而已,并非用于限定本发明的保护范围。 [0068] The above are only preferred embodiments of the present invention but are not intended to limit the scope of the present invention.

Claims (10)

1. 一种基于接入网选择的切换方法,其特征在于,包括:已接入演进的分组系统EPS中的用户终端进行网络切换前,向接入网发现和选择功能ANDSF实体发起获取所述用户终端当前能切换接入的接入网络信息的请求;所述ANDSF实体为所述用户终端确定出所述用户终端当前能切换接入的接入网络及其信任信息,并将所述用户终端能切换接入的接入网络及其信任信息通知所述用户终端; 以及所述用户终端在能切换接入的接入网络中选择接入网络并接入。 An access network selection based handover, characterized by comprising: before the user terminal has accessed EPS Evolved Packet System in the switching network, to the access network discovery and selection function initiates obtaining the ANDSF entity user requesting access to network information of the access terminal can switch current; the ANDSF entity for the user terminal determines that the current user terminal can access the access network and switching trust information, and the user terminal handover access network can access and trust information notifying the user terminal; and the user terminal can select an access network in the access network handover access and access.
2.根据权利要求1所述的方法,其特征在于,将所述用户终端能切换接入的接入网络及其信任信息通知所述用户终端,包括:所述ANDSF实体接收到所述用户终端的请求后,将可信任接入网络及其信任信息,或/ 和非信任接入网络及其信任信息通知所述用户终端。 2. The method according to claim 1, wherein the user terminal is able to switch the access network access and trust information notifying the user terminal, comprising: receiving the ANDSF entity to the user terminal after the request, the trusted access network and the trust information, and / or non-trusted and trusted access network notifying the user terminal information.
3.根据权利要求1所述的方法,其特征在于,所述用户终端向所述ANDSF实体发起的获取能切换接入的接入网络信息的请求中,还携带有用于指示所获取接入网络是可信任接入网络或是非信任接入网络的指示信息。 3. The method according to claim 1, wherein the access network information requesting handover access can be initiated by the user terminal to obtain the ANDSF entity, it is also used for indicating the acquired carries access network is a trusted network or access information indicating a non-trusted access network.
4.根据权利要求3所述的方法,其特征在于,所述ANDSF实体接收到所述用户终端的请求后,将所述用户终端请求接入的可信任接入网络及其信任信息,或非信任接入网络及其信任信息通知所述用户终端。 4. The method according to claim 3, wherein said trusted access network ANDSF entity after receiving the request of the user terminal, the user terminal requesting access information and trust, or trusted access network and the user terminal information notification trust.
5.根据权利要求1至4中任一项所述的方法,其特征在于,所述ANDSF实体中存储有所述用户终端归属网络与当前能切换接入的各接入网络之间的信任关系。 5. The method according to any one of claims to 4 claims, characterized in that the ANDSF entity stores a trust relationship between the current network and the user terminal belongs to the network can access each of the handover access .
6. 一种基于接入网选择的切换装置,其特征在于,包括:发送单元,用于在已接入EPS中的用户终端进行网络切换前,向ANDSF实体发送获取所述用户终端当前能切换接入的接入网络信息的请求;确定单元,用于为所述用户终端确定出所述用户终端当前能切换接入的接入网络及其信任信息;通知单元,用于将所述用户终端能切换接入的接入网络及其信任信息通知所述用户终端;以及选择接入单元,用于在所述用户终端能切换接入的接入网络中选择接入网络并接入。 A switching device based on the selected access network, characterized by comprising: a sending unit, for the user terminal has accessed the EPS network handover pre transmits ANDSF entity to obtain current can switch the user terminal requesting access to the access network information; determining means for determining the user terminal to the access network that the user can switch the access terminal and its current trust information; a notification unit for the user terminal handover access network can access and trust information notifying the user terminal; and the access selecting means for selecting an access network in the user terminal can access the access network switching and access.
7.根据权利要求6所述的装置,其特征在于,所述通知单元将可信任接入网络及其信任信息,或/和非信任接入网络及其信任信息通知所述用户终端。 7. The device according to claim 6, wherein the notification unit and trust the trusted access network information, and / or non-trusted and trusted access network notifying the user terminal information.
8.根据权利要求6所述的装置,其特征在于,所述用户终端向所述ANDSF实体发起的获取能切换接入的接入网络信息的请求中,还携带有用于指示所获取接入网络是可信任接入网络或是非信任接入网络的指示信息。 8. The apparatus according to claim 6, wherein the access network information requesting handover access can be initiated by the user terminal to obtain the ANDSF entity, it is also used for indicating the acquired carries access network is a trusted network or access information indicating a non-trusted access network.
9.根据权利要求6所述的装置,其特征在于,所述通知单元将所述用户终端请求接入的可信任接入网络及其信任信息,或非信任接入网络及其信任信息通知所述用户终端。 9. The apparatus according to claim 6, wherein said trusted access network element notifies said user terminal requesting access and trust information, trusted or untrusted access network information and the notification said user terminal.
10.根据权利要求6至9中任一项所述的装置,其特征在于,所述ANDSF实体中存储有所述用户终端归属网络与当前能切换接入的各接入网络之间的信任关系。 10. The apparatus of one of claims 6-9 in any of the preceding claims, characterized in that the ANDSF entity stores a trust relationship between the current network and the user terminal belongs to the network can access each of the handover access .
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