WO2009043210A1 - Procédé servant à sélectionner une passerelle de réseau radio - Google Patents

Procédé servant à sélectionner une passerelle de réseau radio Download PDF

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Publication number
WO2009043210A1
WO2009043210A1 PCT/CN2007/003931 CN2007003931W WO2009043210A1 WO 2009043210 A1 WO2009043210 A1 WO 2009043210A1 CN 2007003931 W CN2007003931 W CN 2007003931W WO 2009043210 A1 WO2009043210 A1 WO 2009043210A1
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WO
WIPO (PCT)
Prior art keywords
network
3gpp
visited
access
pdg
Prior art date
Application number
PCT/CN2007/003931
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English (en)
Chinese (zh)
Inventor
Xiaoyun Zhou
Zaifeng Zong
Min Fang
Original Assignee
Zte Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Publication of WO2009043210A1 publication Critical patent/WO2009043210A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/17—Selecting a data network PoA [Point of Attachment]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H04W12/069—Authentication using certificates or pre-shared keys

Definitions

  • the present invention relates to a method for selecting a gateway of a wireless network, and more particularly to a gateway selection method for a wireless network in which a 3GPP evolved network is a home network, and a 3GPP network before the evolved network is a roaming scenario of a visited network.
  • FIG. 1 the architecture of SAE non-3GPP IP access is shown in Figure 1, which includes the following network elements:
  • E-UTRAN Evolved UTRAN
  • the network element included in the E-UTRA is an eNodeB (Evolved NodeB), which provides radio resources for terminal access.
  • HSS Home Subscriber Server
  • a home subscriber server that permanently stores user subscription data.
  • MME Mobility Management Entity: A control plane function entity, a server that temporarily stores user data, responsible for managing and storing UE contexts (such as UE identity/ User ID, mobility management status, user security parameters, etc.), assign temporary identifiers to users, when
  • the UE is camped on the tracking area or the network is responsible for authenticating the user; processing all non-access stratum messages between the MME and the UE; triggering paging at the SAE.
  • S-GW (Serving Gateway): A service gateway.
  • the gateway is a user plane entity responsible for user plane data routing processing and terminating downlink data of UEs in idle state. Manage and store the SAE bearer context of the UE, such as IP bearer service parameters and network internal routing information. It is the anchor point of the internal user plane of the 3GPP system. A user can only have one S-GW at a time. In the case of roaming without 3GPP IP access, the S-GW acts as a local anchor for the visited network.
  • PDN GW PDN Gateway
  • PDN Gateway A packet data network gateway, which is responsible for the UE accessing the PDN gateway, assigning the user IP address, and is the mobility anchor of the 3GPP and non-3GPP access systems. Users can access multiple PDN GWs at the same time.
  • Evolved Packet Data Gateway is an evolution and enhancement of PDG (Packet Data Gateway) in an I-WLAN access network. Untrusted non-3GPP access networks must pass ePDG to access the E-PS Core.
  • 3GPP AAA Authentication, Authorization, Accounting: for passing non-3GPP
  • the UE accessing the IP access network provides authentication, authentication, and accounting services.
  • S2a Provides control and mobility support related to the user plane between the trusted non-3GPP IP access network and the PDN Gateway. Supports MIPV4 FA Mode and PMIPv6 mobility management protocols.
  • S2b Provides user plane related control and mobility support between ePDG and PDN Gateway.
  • S2c Provides user plane related control and mobility support between the UE and the PDN Gateway. It can be applied with a trusted or untrusted non-3GPP IP access network or a 3GPP access network. Support for the DSMHV6 mobility management protocol.
  • the PDN GW selection function selects an appropriate PDN for the UE.
  • the HSS/AAA provides the necessary information for the PDN GW selection function.
  • the information provided by HSS/AAA is as follows:
  • the information provided by the HSS/AAA to the PDN GW selection function is either the PDN GW IP address list and the APN (Access Point Name); or the APN and whether the visited land is optional.
  • An indication of the PDN GW of the mobile network (VPLMN, Visited PLMN).
  • the PDN GW selection function When the HSS/AAA provides an indication of the APN and whether the PDN GW of the VPLMN is available for the PDN GW selection function, if the indication indicates that the PDN GW can be selected in the VPLMN, then: the PDN GW selection function first attempts to select from the VPLMN according to the APN. PDN GW, if it fails, the PDN GW selection function then selects the PDN GW from the HPLMN based on the APN.
  • the ePDG When the UE accesses the 3GPP network through the untrusted non-3GPP network, the ePDG must pass.
  • the PMIPv6 protocol is adopted, the PDN GW selection function will be located in the ePDG.
  • the UE can obtain the PDN GW through multiple methods. Select the function information: (1) Obtained through the attach process of 3GPP access; (2) Obtained from the ePDG in the process of establishing an IPSec tunnel. (3) Obtained through DHCP; (4) Obtained through DNS lookup.
  • the I-WLAN access network is a wireless network that has been successfully applied and deployed. It solves the interconnection between the 3GPP network and the WLAN network.
  • the I-WLAN access network is not limited to the interworking between 3GPP and WLAN. Any other IP access network with similar capabilities to WLAN can access WLAN 3GPP IP access and 3GPP through I-WLAN access network.
  • the network is interconnected or directly connected to the Internet via WLAN Derect IP access.
  • the I-WLAN network architecture is shown in Figure 2.
  • the network elements included are as follows:
  • PDG Packet Data Gateway
  • Packet data gateway Packet data gateway, which is the end point of the IPSec tunnel between the UE and the PDG, and encapsulates and encapsulates the data.
  • the UE is authenticated by the 3GPP AAA Server.
  • the UE is assigned a remote IP address and is bound to its local IP address, and performs routing between the PDN and the UE to provide services for the UE to access the 3GPP through the WLAN.
  • PDG does not support the PDN GW selection function.
  • WAG WLAN-Access gateway
  • a WLAN access gateway that isolates the WLAN from the 3GPP network to provide security for the 3GPP network for data filtering and policy enforcement. Billing is also provided in the case of roaming.
  • the roaming scenario is as follows:
  • the UE is the contracted user of the EPS, and the home network is the EPS.
  • the visited network of the UE is the Pre-SAE (Previous SAE, which is the 3GPP network before the EPS. Therefore, the EPS is not supported.
  • the added function is the visited network supports I-WLAN.
  • the UE accesses the 3GPP AAA Proxy of the network and the home network.
  • the HSS/3GPP AAA Server, the UE and the access network perform mutual authentication. After the authentication succeeds, the home network will authorize the UE. Since the UE is a contracted user of the EPS, the HSS/3GPP AAA Server will carry the information parameter of the PDN GW selection function in the authorization return message. Since the 3GPP AAA Proxy (3GPP AAA Proxy Server) of the visited network is Pre-SAE, it does not support the PDN GW selection function information parameter.
  • the PDN GW selects the function parameter to be non-mandatory (that is, when the 3GPP AAA Proxy cannot recognize the parameter, the parameter may not be processed), then there are two cases: a) If the home network authorizes the UE to access the 3GPP network through the visited network PDN GW, it is also acceptable for the UE to access the 3GPP through the visited PDG: (b) If the home network does not authorize the UE to pass through the visited network PDN GW Accessing the 3GPP network, but since the 3GPP AAA Proxy simply ignores the I > DN GW selection function parameter, the UE can still access the 3GPP network through the PDG of the visited network.
  • the PDN GW selects the function parameter to be mandatory (that is, when the 3GPP AAA Proxy cannot recognize the parameter, it will discard the message or return an error message), regardless of whether the home network authorizes the UE to access the visited network PDN GW.
  • the UE In the 3GPP network, the UE cannot access 3GPP, and even cannot access through PDG.
  • the technical problem to be solved by the present invention is to provide a gateway selection method for a wireless network, which solves the problem that when the 3GPP evolved network is a home network, the 3GPP network before the evolved network is a roaming scenario of the visited network, and the UE is connected through the untrusted non-3GPP IP.
  • the problem of gateway selection for access to the network is to provide a gateway selection method for a wireless network, which solves the problem that when the 3GPP evolved network is a home network, the 3GPP network before the evolved network is a roaming scenario of the visited network, and the UE is connected through the untrusted non-3GPP IP.
  • the present invention provides a
  • the present invention solves the problem that when the 3GPP evolved network is the home network, the 3GPP network before the evolved network is the roaming scenario of the visited network, and the gateway is selected by the UE through the untrusted non-3GPP IP access network.
  • the gateway is selected by the UE through the untrusted non-3GPP IP access network.
  • FIG. 1 is an interworking architecture diagram of an EPS and a non-3GPP IP access network when non-roaming
  • FIG. 1 is a non-roaming. I-WLAN architecture diagram
  • 3 is a roaming scenario diagram of UE untrusted non-3GPP access when the 3GPP evolved network is a home network and the evolved network is a visited network;
  • FIG. 4 is a flow chart of a gateway selection method for a wireless network in a preferred embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a preferred embodiment of the present invention, when the 3GPP evolved network is a home network, and the 3GPP network before the evolved network is a roaming scenario of the visited network, the UE authenticates when accessing the 3GPP service through the non-trusted non-3GPP access network. Authentication flow chart. Preferred embodiment of the invention
  • a method for selecting a gateway of a wireless network is applied to a state in which the 3GPP evolved network is a home network and the 3GPP network before the evolved network is a visited network, and the following steps are included.
  • Step 110 When the UE accesses the untrusted non-3GPP IP access network, the home 3GPP AAA Server authenticates the UE. If the authentication succeeds, step 120 is performed; otherwise, the process ends; the visited non-trusted non-3GPP IP access Net through 3GPP AAA Server, or, through
  • the 3GPP AAA Server and the HSS perform access authentication or tunnel authentication on the visited UE.
  • Step 120 The home 3GPP AAA Server determines the selection function information parameter of the PDN GW according to the subscription information of the UE, and determines whether the UE can access the 3GPP or the external data network through the PDG of the visited network according to the roaming protocol and the network policy, and the home 3GHP
  • the AAA Server sends a return message to the visited 3GPP AAA Proxy;
  • the return message carries an indication parameter that does not allow the UE to access the 3GPP or the external data network through the visited network PDG; if the home 3GPP AAA Server Allow the UE to pass If the PDG of the visited network accesses the 3GPP or the external data network, the return message does not carry an indication parameter that does not allow the UE to access the 3GPP or the external data network through the visited network PDG.
  • the PDN GW selection function information parameter is non-mandatory, and the indication parameters that are not allowed to access the 3GPP or the external data network through the visited network PDG are mandatory.
  • Step 130 after the visited 3GPP AAA Proxy receives the return message sent by the home 3GPP AAA Server, if the return message does not carry the indication parameter that does not allow the UE to access the 3GPP or the external data network through the visited network PDG, step 140 is performed; Otherwise, step 150 is performed; step 140, the visited 3GPP AAA Proxy ignores the selection function information parameter of the PDN GW, and forwards the return message to the visited network PDG, and performs step 160;
  • Step 150 Visiting the 3GPP AAA Proxy to discard the return message or to the home 3GPP
  • AAA Server returns an error message and ends the process
  • the visited 3GPP AAA Proxy discards the return message or returns an error message to the home 3GPP AAA Server, and the process ends.
  • Step 160 The visited network PDG receives the return message, and authorizes the UE to access the 3GPP or the external data network by visiting the local network PDG.
  • this example describes authentication authentication when a 3GPP evolved network is a home network, and the 3GPP network before the evolved network is a visited network, and the UE accesses the 3GPP service through the untrusted non-3GPP access network.
  • the process including the following steps,
  • Step 501 The UE establishes an IKE (Internet Key Exchange) security association with the PDG, and the UE sends a User Identity (NAI) (Network Access Identifier) and a W-APN (WLAN Access Point Name), and adopts EAP.
  • NAI User Identity
  • W-APN WLAN Access Point Name
  • Step 502 The PDG sends an authorization request message to the 3GPP AAA Server, where
  • Step 503 The 3GPP AAA Server determines, according to the subscription information, the roaming protocol, and the network policy of the user, whether the tunnel can be established and whether the visited PDG is allowed to access the 3GPP network or The external data network, if the tunnel is allowed to be established and the access to the 3GPP network or the external data network is allowed through the visited PDG, step 504a is performed; if the tunnel is allowed to be established but not allowed to access the 3GPP network or the external data network by the visited PDG, the execution is performed. Step 504b;
  • Step 504a the 3GPP AAA Server allows the UE to access the 3GPP or the external data network through the PDG, and sends an authorization-response message to the 3GPP AAA Proxy, carrying the PDN GW to select the function information, and performing step 505a;
  • the PDN GW selection function information is not mandatory.
  • Step 505a the 3GPP AAA Proxy receives the authorization-response message, ignores the PDN GW selection function information in the message, and forwards it to the PDG, and performs step 506a;
  • Step 506a The PDG receives the authorization-response message, ignores the 3PDN GW selection function information in the message, and sends an IKE-authentication response message to the UE.
  • Step 507a The PDG receives the authorization-response message, ignores the 3PDN GW selection function information in the message, and sends an IKE-authentication response message to the UE.
  • Step 507a The UE receives the EAP success message, and the access authentication authentication succeeds.
  • Step 504b the 3GPP AAA Server does not allow the UE to access the 3GPP or the external data network through the PDG, and sends an authorization-response message to the 3GPP AAA Proxy, carrying the PDN GW to select the function information and not allowing the PDG access indication, and performing step 505b;
  • the PDG access indication is not allowed to be mandatory.
  • Step 505b The 3GPP AAA Proxy receives the authorization response-message, and the message carries the PDG access indication. Since the 3GPP AAA Proxy cannot identify the parameter and the parameter is mandatory, the 3GPP AAA Proxy discards the message. Performing step 506b;
  • Step 506b In 505b, the 3GPP AAA Proxy discards the message, the session times out, the authentication fails, and the process ends.
  • the technical solution of the present invention solves the problem that when the 3GPP evolved network is the home network, the 3GPP network before the evolved network is the roaming scenario of the visited network, and the UE selects the gateway through the untrusted non-3GPP IP access network, A secure and reliable gateway selection method for wireless networks.

Abstract

Procédé servant à sélectionner une passerelle de réseau radio et consistant en les étapes suivantes: si le serveur 3GPP AAA effectue avec succès une authentification pour UE, ce serveur 3GPP AAA domestique détermine le paramètre d'information de fonction de sélection et détermine si UE accède au réseau 3GPP par l'intermédiaire de PDG visité, puis envoie le message de retour au proxy 3GPP AAA visité; si le message de retour n'est pas porteur du paramètre d'indication n'autorisant pas UE d'accéder au réseau 3GPP par l'intermédiaire de PDG visité, le proxy 3GPP AAA visité ignore le paramètre d'information de fonction de sélection et envoie le message de retour à PDG visité; enfin, PDG visité autorise l'accès au réseau de UE. Quand le réseau 3GPP évolué est un réseau domestique et que le réseau 3GPP du réseau pré-évolué est le réseau visité, l'invention résout le problème de sélection de passerelle quand UE accède au réseau par l'intermédiaire d'un réseau d'accès IP non fiable et non 3GPP.
PCT/CN2007/003931 2007-09-30 2007-12-29 Procédé servant à sélectionner une passerelle de réseau radio WO2009043210A1 (fr)

Applications Claiming Priority (2)

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CN200710181006.3 2007-09-30
CN2007101810063A CN101141822B (zh) 2007-09-30 2007-09-30 一种无线网络的网关选择方法

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CN101472263B (zh) * 2008-05-04 2011-12-28 中兴通讯股份有限公司 一种网络连接方式的决定方法
CN101472262B (zh) * 2008-05-04 2012-05-16 中兴通讯股份有限公司 一种接入网络的实现方法
CN101577909B (zh) * 2008-05-05 2011-03-23 大唐移动通信设备有限公司 非3gpp接入系统信任类型的获取方法、系统及装置
CN101472261B (zh) * 2008-05-08 2011-10-26 中兴通讯股份有限公司 一种用户设备接入业务网络的方法
CN101335703B (zh) * 2008-05-30 2011-08-10 中兴通讯股份有限公司 端到端的服务质量保证方法
CN101677470B (zh) * 2008-09-18 2011-12-21 华为技术有限公司 服务请求的处理方法、装置及系统
CN101815296A (zh) * 2009-02-23 2010-08-25 华为技术有限公司 一种进行接入认证的方法、装置及系统
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