WO2010054843A1 - Procédé et système d'accès à des points d'accès sans fil privés et/ou détenus commercialement - Google Patents

Procédé et système d'accès à des points d'accès sans fil privés et/ou détenus commercialement Download PDF

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Publication number
WO2010054843A1
WO2010054843A1 PCT/EP2009/008142 EP2009008142W WO2010054843A1 WO 2010054843 A1 WO2010054843 A1 WO 2010054843A1 EP 2009008142 W EP2009008142 W EP 2009008142W WO 2010054843 A1 WO2010054843 A1 WO 2010054843A1
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WO
WIPO (PCT)
Prior art keywords
network
wireless access
mobile terminal
mobile
access point
Prior art date
Application number
PCT/EP2009/008142
Other languages
English (en)
Inventor
Pierre Imai
Gottfried Punz
Bernd Lamparter
Stefan Schmid
Original Assignee
Nec Europe Ltd.
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 Nec Europe Ltd. filed Critical Nec Europe Ltd.
Publication of WO2010054843A1 publication Critical patent/WO2010054843A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0892—Network architectures or network communication protocols for network security for authentication of entities by using authentication-authorization-accounting [AAA] servers or protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/18—Network architectures or network communication protocols for network security using different networks or channels, e.g. using out of band channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H04W12/068—Authentication using credential vaults, e.g. password manager applications or one time password [OTP] applications
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H04W12/088—Access security using filters or firewalls
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the present invention relates to a method and a system for accessing private and/or commercially owned wireless access points, wherein a user has a subscription with a mobile network operator and wherein a mobile terminal of said user has established a radio connection and security association to said mobile network operator's macro network.
  • wireless access points and similar appliances are prevalent and can be found almost everywhere.
  • these wireless access points are not publicly accessible for mobile terminals, since they are either private or require a pre-existing account with a local operator.
  • current technology allows only for connections to wireless access points for which the user possesses valid login credentials. These credentials have to be either manually preconfigured or entered at connection time. As a result, high-speed coverage for mobile terminal data transfers is severely limited.
  • the aforementioned object is accomplished by a system comprising the features of claim 1.
  • a method comprising the features of claim 1.
  • said mobile network operator's macro network is used to negotiate and/or transfer access credentials and/or authorization data between said mobile terminal and said wireless access point on demand.
  • CONFIRMATION COPT negotiate and/or transfer access credentials and/or authorization data between said mobile terminal and said wireless access point on demand.
  • the present invention proposes to utilize the mobile terminal's established secure radio connection and security association to a network operator's macro network for accessing private and/or commercially owned wireless access points.
  • a network operator's macro network for accessing private and/or commercially owned wireless access points.
  • the home operator's subscription and infrastructure can be used for authentication & authorization towards the macro network operator.
  • the macro network operator's infrastructure can be used to negotiate/transfer the necessary access credentials/authorization information between the mobile terminal and the wireless access point on demand.
  • the term "macro network” will be used for generally denoting a network of a mobile network operator that provides a kind of long-term security association and that typically provides wide area coverage.
  • Example networks include, but are not limited to, 3GPP, 3GPP2 or WiMAX based networks.
  • the term “Wireless Access Point (WAP)” will be used for denoting network-side equipment under 3 rd party control that resides for example in a home or public location.
  • the WAP terminates the radio/L2 link. It may operate in unlicensed (e.g. WLAN) or licensed (e.g. 3GPP home NB/eNB) radio spectrum. It may be integrated with or separated from a L3 device.
  • Access Credentials will be used for generally denoting information that allows the mobile terminal to gain access through the WAP.
  • the access credentials are temporary credentials, which can e.g. be based on permanent credentials known to the mobile terminal and mobile network operator.
  • the access credentials may be of various forms depending on the specific situation and may include, e.g. a shared secret, a public key. However, it is in no way intended to restrict the present invention to any specific form of access credentials, and the above given examples are rather intended to illustrate the diversity of implementations of the present invention.
  • Authorization Data will be used for generally denoting information provided to the WAP and to the mobile terminal after successful authentication of the mobile terminal. They are linked to the access credentials of the mobile terminal. Again, it is in no way intended to restrict the present invention to any specific form of authorization data.
  • the present invention utilizes the network access over one (wireless) access technology (e.g. 3G macro network) and the established security association between the mobile terminal/device and the operator to gain secure access to another (wireless) access network (e.g. a WLAN access point or a Femtocell).
  • wireless access technology e.g. 3G macro network
  • another (wireless) access network e.g. a WLAN access point or a Femtocell.
  • the mobile terminal might employ a specific access technology with respect to the macro network operator's infrastructure, and might possibly use a different access technology for accessing the wireless access point.
  • the macro network may include a dedicated network entity that provides access network discovery and possibly selection support.
  • the network entity may be a server, which will be referred to as WAS (wireless access server) in the following. Assuming the user is located with his mobile terminal in a certain place where coverage of the macro network is limited, and he wishes to establish a high-speed connection. In this case it may be provided that the user's mobile terminal sends an access request via radio to said dedicated network entity in order to learn whether one or more wireless access points are available.
  • WAS wireless access server
  • the dedicated network entity of the macro network may generate a list of possible wireless access points. Based on this information, the mobile terminal may initiate a selective scan for the wireless access points and may select the most appropriate one. For instance, a selection criterion may be the signal quality, i.e. the mobile terminal may select the wireless access point that offers the highest signal strength. In a next step the mobile terminal may inform the dedicated network entity of said macro network about the selected wireless access point.
  • the dedicated network entity of the macro network may contact the selected wireless access point or an associated AAA (Authentication, Authorization, Accounting) entity, for instance a Radius server.
  • AAA Authentication, Authorization, Accounting
  • the AAA function can be integrated into the wireless access point or be provided as a separate entity. It can also be under a different control than the wireless access point (e.g. under the same or another operator's control). According to a specific embodiment, the access credentials and/or authorization data may then be provided either by the wireless access point or by the associated AAA entity.
  • the network entity of said macro network may provide information elements for the generation of the access credentials and/or authorization data to the mobile terminal.
  • the authorization data may also include additional information regarding a definition of the resources the mobile terminal can consume.
  • the additional information may specify a maximum data rate or a scheduling priority.
  • more complex data like firewall rules, can be included, in particular for restricting what entities/parts of the macro network the terminal can access. For instance, in case of a 4G mobile core network these rules may specify that the mobile terminal is granted access to the macro network operator's (e)PDG (evolved Packet Data Gateway) only. These rules may be service/flow dependent.
  • this data may include settings like membership in a user group by a white list (e.g. for the 3GPP Closed Subscriber Group mechanism used for femto cells).
  • the macro network should be informed of successful connection. This task can be performed either by the mobile terminal itself or by the wireless access point or by both.
  • the dedicated network entity of the macro network having negotiated the connection to the wireless access point that is informed of successful connection.
  • the successful connection information message could be directed to a dedicated charging entity within the macro network.
  • the mobile network operator's macro network keeps track of the connection duration and of the consumed bandwidth.
  • the user's mobile terminal is under the macro network operator's control and therefore considered trustworthy (based on permanent credentials). Therefore exact information about the duration of the connection to the wireless access point can be retrieved directly from the terminal.
  • the user of the mobile terminal i.e. the mobile subscriber, could be automatically charged by the mobile network operator's charging/billing infrastructure for the access service provided by the wireless access point, which is a third party entity from the viewpoint of the operator. For instance, it may be provided that the user pays via the normal phone bill issued by his provider.
  • the charging model could be based on a flat-rate, a charge per access, or charging according to the consumed data or online time and possibly in conjunction with the actual user/data services used.
  • the owner of the wireless access point may be provided that he profits by being compensated per use for providing access service by the mobile network operator, for instance based on micro payments, on a flatrate reimbursement or on exact accounting of access times and/or data volume consumed by customers of the mobile network operator.
  • the owner of the wireless access point gets a reimbursement based on rough accounting - e.g. just the number of users that gained access, rough estimate of traffic usage or online time.
  • the owner of the wireless access point may get incentives, e.g. earn some points, which he/she can for example use to get access at other wireless access points, or exchange into other services or products offered by the operator or others.
  • an efficient charging reporting is essential. For instance, according to one embodiment only final usage is reported to the charging entity of the macro network (i.e. time of access and data usage). Alternatively, it may be provided that the start and end time of access plus periodic intermediate reports of used bandwidth is reported.
  • the charging information may be provided either by the wireless access point or by the mobile terminal. However, according to a preferred embodiment it may be provided that both the wireless access point as well as the mobile terminal provide charging information. In such case the charging entity can use both reports to validate them. If the reports are significantly different, the macro network operator tries to identify the source of the problem. It may also start to "blacklist" the mobile terminal and/or the wireless access point. For the case that the user plane is routed through the mobile network operator's macro network (i.e. IPsec between UE and (e)PDG), charging can be applied there. Consequently, no charging reports will be needed from the mobile terminal and/or the wireless access point.
  • Fig. 1 schematically illustrates the principal architecture of a system for accessing private and/or commercially owned wireless access points according to an embodiment of the present invention
  • Fig. 2 schematically illustrates a message flow for access credential generation between a mobile terminal, a macro network and a wireless access point according to an embodiment of the present invention
  • Fig. 3 schematically illustrates a message flow for access credential generation between the same entities of Fig. 2 according to another embodiment of the present invention.
  • Fig. 1 shows a system for accessing a private and/or commercially owned wireless access point, in the following briefly denoted WAP, according to an embodiment of the present invention.
  • WAP wireless access point
  • the operator's macro network is used to negotiate and/or transfer access credentials and/or authorization data between the mobile terminal and the WAP on demand. That is, the invention utilizes the network access over one (wireless) access technology (e.g. 3G macro network) and the established security association between the mobile terminal/device and the operator to gain secure access to another (wireless) access network (e.g. a WLAN access point or a Femtocell) - possibly using a different (wireless) access technology.
  • wireless wireless access technology
  • the technology is not limited to WLAN - it applies equally to WiMAX APs and licensed band femto cells according to 3GPP or similar access technologies.
  • the technology can also be used to allow semi-open access. In this case the owner of the WAP may need to provide the mobile user a "shared secret", which allows the terminal to use this approach to gain access to the WAP.
  • the WAP (or AAA entity in case it is separate) may have a SIM or equivalent that can be used to secure communication between the WAP (or AAA entity) and the macro network operator network.
  • Access to a network can also be retrieved in advance (e.g. based on location and directional information), before the actual network becomes visible to the user. Furthermore, since the macro network operator is involved in the authorization process, the overall security of the operator network can be increased: The operator might restrict access to its infrastructure to devices which are connected via a network authorized as described in the present invention and/or deny access from/to networks that are considered insecure.
  • the WAP owners register their SSID, MAC, keys (e.g. WEP, WPA or the like), their location, and payment details with any operator.
  • Inter-operator access to WAPs is handled using extended roaming agreements.
  • the WAS and/or a charging entity can be distributed across visited and home network, or only provisioned by the visited network. In the latter case, authentication by the home network can be accomplished via standard authentication mechanisms in the roaming case.
  • the present invention provides a unified approach for different types of wireless hotspots, e.g. WLAN and open access mode of future licensed band femto cells according to 3GPP.
  • WLAN/WiMAX access control to the WAP can be based on EAP-TLS (Extensible Authentication Protocol-Transport Layer Security) using e.g. RADIUS or Diameter authentication.
  • RADIUS Remote Authentication Protocol-Transport Layer Security
  • Diameter authentication e.g. RADIUS or Diameter authentication
  • the WAP would authenticate the mobile terminal using the RADIUS or Diameter protocol.
  • the AAA function would be a RADIUS or Diameter server.
  • Pre- shared key authentication has to be avoided as access credentials should be of temporary nature. Certificates can be issued by the authentication entities and distributed as with public/private keys.
  • the authentication server can either be based in the macro network operator network or on the premises of the WAP owner, in which case the authentication has to involve another authentication entity within the macro network operator network (e.g. HSS, 3GPP AAA server or WAS).
  • the communication between the authentication servers can be based on RADIUS, Diameter, etc.
  • Web-based access control solutions offer an interface for authentication to e.g. RADIUS or Diameter Server, where the user can input his credentials or the terminal by itself provides the previously negotiated/generated temporary access credentials using HTTP(S) to the WAP.
  • RADIUS Remote Authentication Diameter
  • Diameter Server where the user can input his credentials or the terminal by itself provides the previously negotiated/generated temporary access credentials using HTTP(S) to the WAP.
  • HTTP(S) HyperText Transfer Protocol Secure
  • the mobile terminal In case of Femto cell/H(e)NB (Home NodeB) access control according to 3GPP, the mobile terminal (typically referred to as UE in 3GPP specifications), must first be configured to be aware of a H(e)NB. To this end, upon the access request sent from the mobile terminal to his provider/operator macro network, the mobile terminal is configured by the macro network provider/operator (e.g. triggered by the WAS) to become part of the user group (e.g. a Closed Subscriber Group) that is allowed to access the WAP. For this, the WAP is added to the list of allowed WAPs that the terminal can use. The management of membership may be achieved by a secure protocol between UE and macro network operator's network. In this case the WAS may be integrated or interface with the network entity managing these list of allowed H(e)NB/CSGCSGs.
  • the WAS may be integrated or interface with the network entity managing these list of allowed H(e)NB/CSGCSGs.
  • the present invention allows for wireless network access (e.g. Internet access or access to macro network operator services) through third-party wireless access points (WAPs) based on an established macro network operator subscription and established security association between a mobile terminal and the macro operator network; after authentication and authorization of the mobile terminal, the macro operator (i.e. the wireless access server) will setup the necessary access credentials on the mobile terminal and access point.
  • WAPs wireless access points
  • the present invention realizes a decoupling of WAP ownership and network provision, i.e. third-party owners of WAPs can provide mobile users local access to the Internet or macro network operator services; the charging/accounting facility supported by the invention provides the necessary incentives for WAP owners to offer their WAP to mobile users in a simple, easy and cost-effective manner (e.g. the macro network operator's accounting and charging facilities (incl. the billing infrastructure) can be used.
  • Fig. 2 exemplarily illustrates a specific scheme that can be implemented for the generation of access credentials which are employed for establishing a secure and trusted connection between the mobile terminal and the wireless access point of Fig. 1.
  • the only further entity being involved in the negotiation and/or transfer of the access credentials and the authorization data is a dedicated network entity located in the mobile network operator's macro network.
  • this dedicated network entity is a server that provides an access network discovery functionality and selection support. In the following this server is referred to as wireless access server WAS.
  • the access credentials are generated by the mobile terminal. More specifically, the mobile terminal generates temporary access credentials and provides them to the WAS entity, which in turn delivers it to the WAP. According to another embodiment, temporary access credentials may be generated by the WAS and may then be provided both to the mobile terminal and to the WAP. Alternatively, it may also be provided that the WAP generates access credentials and provides them to the WAS, which in turn delivers it to the mobile terminal.
  • access credentials are generated mutually by the WAP and the mobile terminal.
  • Both the mobile terminal and the WAP may provide a random number -number A from the mobile terminal and number B form the WAP - to the WAS, which in turns delivers it to the counter part.
  • both entities can compute the actual access credentials according to a well-known scheme, e.g. on the basis of a Diffie-Hellman algorithm. This way, the actual "secret" is never transmitted, only the WAP and mobile terminal know the access credentials.
  • the mobile terminal uses them for login to the WAP, as illustrated in Fig. 2.
  • the access credentials may be mutually generated involving the WAP, the mobile terminal and the WAS.
  • all involved entities i.e. mobile terminal, WAP and WAS
  • the WAS uses the information element obtained from the mobile terminal - number A - plus a self-generated key pair to generate the access credentials for the WAP and sends it to the WAP.
  • the WAS generates access credentials for the mobile terminal (i.e. based on an information element obtained from the WAP - number B - and the inverse key) and sends it to the mobile terminal.
  • the mobile terminal uses them for login to the WAP.
  • Non-Access Stratum NAS
  • NAS Non-Access Stratum
  • network security between the AAA and macro network operator network can also be based on a SIM included in the WAP or AAA.
  • network security can be terminated in an entity "before" the WAS - e.g. an (e)PDG.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé d'accès à des points d'accès sans fil privés et/ou détenus commercialement, un utilisateur ayant un abonnement auprès d'un opérateur de réseau mobile et un terminal mobile dudit utilisateur ayant établi une connexion radio et une association de sécurité auprès du macroréseau dudit opérateur de réseau mobile, lequel procédé est caractérisé en ce que le macroréseau dudit opérateur de réseau mobile est utilisé pour négocier et/ou transférer des justificatifs d'accès et/ou des données d'autorisation entre ledit terminal mobile et ledit point d'accès sans fil à la demande. L'invention porte en outre sur un système correspondant.
PCT/EP2009/008142 2008-11-14 2009-11-16 Procédé et système d'accès à des points d'accès sans fil privés et/ou détenus commercialement WO2010054843A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08019905 2008-11-14
EP08019905.2 2008-11-14

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WO2010054843A1 true WO2010054843A1 (fr) 2010-05-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2479376A (en) * 2010-04-07 2011-10-12 Toshiba Res Europ Ltd Negotiating with a femto-cell base station for access to a portion of a physical radio channel for communicating to a user station
WO2013130336A1 (fr) * 2012-02-29 2013-09-06 Apple Inc. Transition sans solution de continuité d'un téléphone cellulaire de la communication cellulaire à la communication wi-fi

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GB2393083A (en) * 2002-09-10 2004-03-17 Hewlett Packard Development Co Checking authenticity of provider of location based (hotspot) service
US20050130627A1 (en) * 2003-11-26 2005-06-16 Benoit Calmels Authentication between a cellular phone and an access point of a short-range network
EP1565030A1 (fr) * 2004-02-10 2005-08-17 Alcatel Procédé de sélection d'un réseau de communications, à partir d'informations sur des points d'accès de réseau local sans fil, transmises par un réseau cellulaire
US20060221917A1 (en) * 2005-04-01 2006-10-05 Mcrae Matthew B Access point provisioning and mapping in dual mode devices
US20070256135A1 (en) * 2006-04-26 2007-11-01 Sbc Knowledge Ventures, L.P. Wireless local area network access controlled by cellular communications

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
GB2393083A (en) * 2002-09-10 2004-03-17 Hewlett Packard Development Co Checking authenticity of provider of location based (hotspot) service
US20050130627A1 (en) * 2003-11-26 2005-06-16 Benoit Calmels Authentication between a cellular phone and an access point of a short-range network
EP1565030A1 (fr) * 2004-02-10 2005-08-17 Alcatel Procédé de sélection d'un réseau de communications, à partir d'informations sur des points d'accès de réseau local sans fil, transmises par un réseau cellulaire
US20060221917A1 (en) * 2005-04-01 2006-10-05 Mcrae Matthew B Access point provisioning and mapping in dual mode devices
US20070256135A1 (en) * 2006-04-26 2007-11-01 Sbc Knowledge Ventures, L.P. Wireless local area network access controlled by cellular communications

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2479376A (en) * 2010-04-07 2011-10-12 Toshiba Res Europ Ltd Negotiating with a femto-cell base station for access to a portion of a physical radio channel for communicating to a user station
GB2479376B (en) * 2010-04-07 2012-05-02 Toshiba Res Europ Ltd Mechanism of mobility management through a group of femto-cell base stations on offloading data-packets
WO2013130336A1 (fr) * 2012-02-29 2013-09-06 Apple Inc. Transition sans solution de continuité d'un téléphone cellulaire de la communication cellulaire à la communication wi-fi
CN104205933A (zh) * 2012-02-29 2014-12-10 苹果公司 蜂窝电话从蜂窝通信到Wi-Fi通信的无缝转变
JP2015512220A (ja) * 2012-02-29 2015-04-23 アップル インコーポレイテッド セルラー通信からＷｉ−Ｆｉ通信へのセルラー電話のシームレス遷移
CN104205933B (zh) * 2012-02-29 2020-01-07 苹果公司 蜂窝电话从蜂窝通信到Wi-Fi通信的无缝转变

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