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WO2006074592A1 - Procede et dispositif de prise en charge de reseaux logiques multiples dans un reseau wlan - Google Patents

Procede et dispositif de prise en charge de reseaux logiques multiples dans un reseau wlan Download PDF

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Publication number
WO2006074592A1
WO2006074592A1 PCT/CN2005/002354 CN2005002354W WO2006074592A1 WO 2006074592 A1 WO2006074592 A1 WO 2006074592A1 CN 2005002354 W CN2005002354 W CN 2005002354W WO 2006074592 A1 WO2006074592 A1 WO 2006074592A1
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WO
WIPO (PCT)
Prior art keywords
mobile station
network
logical network
authentication
association
Prior art date
Application number
PCT/CN2005/002354
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English (en)
Chinese (zh)
Inventor
Zhonghui Yao
Original Assignee
Huawei Technologies Co., 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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2006074592A1 publication Critical patent/WO2006074592A1/fr

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Classifications

    • 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]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • the present invention relates to wireless local area networks, and more particularly to a method and apparatus for supporting multiple logical networks in a wireless local area network (WLAN).
  • WLAN wireless local area network
  • WLAN wireless local area network
  • IEEE 802.11 has become a de facto standard and has been widely supported and applied, including enterprise wireless networking applications and operating applications as public hotspots. Since WLANs mainly use non-regulated frequency bands, deploying WLAN networks simultaneously by multiple operators in the same location is likely to cause interference and eventually lead to degradation of service quality or even unavailability of the network. Therefore, there is a need for WLAN network facility sharing, such as multiple The WLAN access service provider shares the public hotspot WLA infrastructure and the enterprise WLAN network as the operator access network to provide public access services for corporate visitors. '
  • the networks defined by IEEE 802.il include two major categories: ad hoc networks and structured networks (infmstructure).
  • An ad hoc network refers to a network in which a group of sites spontaneously form a network. The two groups communicate with each other through radio waves.
  • the ad hoc network is also called an independent basic service set (IBSS).
  • the structured network has a special site: access points (APs). Other sites establish associations with APs within the AP coverage to form a basic service set (BSS), as shown in Figure 1.
  • BSSs basic service set
  • Different BSSs form an extended service set (ESS) through the interconnection between APs, and there is no restriction on the interconnection technology.
  • ESS extended service set
  • Network sharing mainly refers to the sharing of structured networks.
  • a basic service set or a site in an extended service set forms a local area network.
  • An IEEE 802.11 mobile station (MT) is associated with an AP, that is, by joining the basic service set or extended service set, it can interwork with other mobile stations in the service set.
  • a service set identifier (SSID) is used in the WLAN to identify an extended service set.
  • the process of establishing association between the mobile station and the AP is shown in Figure 2.
  • the flowchart is divided into three phases: channel scanning, authentication, and association.
  • the channel scan mainly obtains the basic parameters of the system: including BSSID and SSID.
  • the probe request is sent, and the AP returns a probe response after receiving the probe response.
  • the Probe Response carries the same parameters as the Beacon. After the mobile station determines the channel to access, it enters the authentication phase.
  • the current WLAN network security does not depend on the authentication process before the association.
  • the open system authentication is used.
  • the mobile station sends an authentication request (authentication request) to use the open system authentication, and the AP returns an authentication response (Authentication Response).
  • Authentication Response After the authentication, the user enters the association phase, that is, the mobile station initiates an association request, and the AP returns an association response.
  • IEEE 802.11i enhances the security of IEEE 802.11, which uses 802.1X (port-based access control method) to control mobile access.
  • 802.1X defines controlled ports and uncontrolled ports.
  • the station (MT) is associated with the AP
  • the MT performs an authentication interaction process with the backend authentication server via the AP, and the related frame is transmitted through the uncontrolled port, and the controlled port is closed. In this case, except the authentication server, the MT and the ESS. Data communication with other mobile stations or external networks is prohibited.
  • the unicast encryption key and the multicast encryption key are negotiated between the MT and the AP. After the key negotiation is completed, the controlled port is opened.
  • the MT can communicate with other mobile stations or external networks in the ESS, and use the negotiated key and algorithm to encrypt and transmit between the MT and the AP.
  • the 802.11i-enabled network is called the Robust Security Network. After completing the 802.IX authentication and key negotiation, the MT is truly associated with the AP.
  • a basic service collective or extended service set represents a set of interoperable WLAN mobile stations that form a wireless local area network.
  • Service Set Identifier SSID represents such a wireless local area network. Therefore, when the same infrastructure is required to support multiple logical networks, if an AP can support multiple SSIDs, it is equivalent to supporting multiple logical networks. For MTs belonging to different logical networks, the configured SSID is different. On the AP, the SSIDs of all logical networks are configured, and the same AP can be mapped to multiple ESSs.
  • the mobile station first scans the channel, when the corresponding SSID of the channel is the same When 05 002354, the association operation will be performed.
  • the Probe Request will carry the corresponding SSID.
  • the AP supports the SSID it responds to the Probe response.
  • the mobile station adopts passive scanning since the standard Beacon frame has only one SSID field, other SSIDs are not visible to the mobile station, when the mobile station's SSID and the received Beacon frame are received. When the SSID is different, there is no chance to access the network.
  • Each virtual AP has a different BSSID and belongs to a different ESS.
  • the virtual AP method is mainly proposed to solve the problem that the SSID is invisible to the mobile station when the AP supports multiple SSIDs in the solution 1.
  • the virtual AP method enables one physical AP to simulate multiple virtual APs, and each virtual AP has its own independent MAC management frame. For example, different virtual APs can independently broadcast their own Beacon frames, each carrying their own corresponding SSID. Mobile stations belonging to different logical networks are equivalently associated with different virtual APs.
  • the access scheduling function of the virtual AP needs to be added to the same transmission medium, which not only increases the complexity of the AP implementation, but also increases the management of the air interface resources at the MAC layer.
  • the overhead (supporting the MAC layer of multiple virtual APs at the same time) reduces the effective bandwidth of the air interface.
  • the present invention provides a method and apparatus for supporting multiple logical networks in a wireless local area network to solve the problem of high complexity and increased wireless resource overhead when the WLAN network supports multiple logical networks.
  • a method for supporting a plurality of logical networks in a wireless local area network after the mobile station in the wireless local area network establishes an 802.11 association with the network side, the network side acquires a logical network identifier of the logical network to which the mobile station belongs, and according to the The logical network identity connects the mobile station to the corresponding logical network.
  • the mobile station establishes an 802.11 association with the network side depending on the matching service set identifier (SSID), or the mobile station does not rely on the matching SSID to establish an 802.11 association with the network side.
  • SSID matching service set identifier
  • the mobile station does not depend on the matching SSID, and the mobile station does not compare the SSID configured by the local end with the SSID in the beacon frame or the query response frame sent by the network side during the establishment of the association; or, the mobile station does not depend on
  • the matching SSID refers to the beacon frame or the probe response frame sent by the network side.
  • the SSID is not carried or the SSID is set to null, and the mobile station continues the subsequent processing when it is determined that the SSID or the SSID is empty in the beacon frame or the inquiry response frame.
  • the network side obtains the logical network identifier from the authentication response message sent by the mobile station according to the security parameter negotiated when the 802.11 association is established. If the mobile station determines that the mobile station supports the wireless local area network authentication and security infrastructure ( WAPI) authentication, the logical network identifier is obtained from the access authentication request message sent by the mobile.
  • WAPI wireless local area network authentication and security infrastructure
  • the mobile station If the network determines that the mobile station does not support 802.1X authentication or WAPI authentication according to the security parameters negotiated when establishing the 802.11 association, the mobile station directly accesses the logical network corresponding to the default logical network identifier.
  • a logical access controller configured to access a mobile station in a wireless local area network to a logical network; including an 802.11 association unit, a logical network selection unit, and a logical network association unit; the 802.11 association unit is used to move with a network
  • the station establishes an 802.11 association, and sends an authentication request and a response response message to the mobile station, where the association process does not depend on matching a service set identifier (SSID) of the logical network;
  • the logical network selection unit is configured to receive from the 802.11 association unit Obtaining a logical network identifier in the response packet, selecting a logical network to which the mobile station belongs according to the identifier, and sending an authentication request to the corresponding logical network association unit;
  • the logical network association unit is configured to respond to the authentication request of the logical network selection unit, to complete Authentication and associated key negotiation between the mobile station and the logical network to which the mobile station belongs.
  • the mobile station When the mobile station associates with the network side AP, the mobile station may depend on the SSID or the SSID, and only acquire the logical network identifier to distinguish different logical networks after establishing the association, so that not only is the implementation simple, but also The additional bandwidth of the air interface is not additionally occupied, avoiding the limitations of the prior art.
  • FIG. 1 is a schematic diagram of a structured network in the prior art
  • FIG. 2 is a flow chart of establishing association between a mobile station and an AP in the prior art
  • Figure 3 is a schematic diagram of supporting multiple logical networks
  • FIG. 4 is a schematic structural diagram of a logical access controller
  • FIG. 5 is a flowchart of a mobile station accessing a logical network according to the present invention.
  • FIG. 6 is a flowchart of a mobile station accessing a logical network and adopting 802.11 authentication according to the present invention
  • FIG. 2 is a flowchart of a mobile station accessing a logical network and using WAPI authentication according to the present invention. detailed description
  • the present invention uses a logical network identifier to distinguish different logical networks on the same service set identifier (SSID) after the mobile station (MT) establishes an 802.11 association with the network side of the wireless local area network.
  • SSID service set identifier
  • the mobile station can establish 802.11 association with the network side in the following two ways:
  • the 802.11 association is established independently of the matching SSID, that is, the physical AP is not distinguished by the SSID. In this way, even if the SSID of the mobile station does not match the SSID of the AP, the AP can be accessed. This is because the service set identifier (SSID) is transmitted in clear text in the air interface. It is very easy to obtain the configuration of the SSID of each access point (AP) and mobile station through air interface scanning. Therefore, it is not good if it only depends on SSID matching. To ensure safety. If the logical network provides other secure authentication mechanisms between the mobile station and the logical network, SSID matching may not be used at all.
  • the mobile station When the mobile station establishes 802.11 association with the network, it does not distinguish between the logical network, or the mobile station does not depend on the service set identifier (SSID) of the current wireless local area network, and can be implemented by:
  • the mobile station does not compare the SSID of the local end with the SSID of the beacon frame or the inquiry response frame after receiving the beacon frame or probe response of the AP. , directly follow the same steps as the prior art.
  • the AP does not carry the SSID in the transmitted beacon frame or the probe response frame, or sets the SSID to be empty (ie, an empty string), and the mobile station receives the beacon of the AP (Beacon). After the frame or probe response (Probe Response), it is found that the SSID is empty or has no SSID, and the subsequent steps are the same as the prior art.
  • a WLAN network supports multiple logical networks as shown in FIG. 3.
  • the WLAN supports logical network A, logical network B, and logical network (:.
  • the security mechanisms required by mobile stations of different logical networks to support the logical network include authentication methods.
  • the encryption method, the user identity of the different logical network contains the logical network identifier or can infer the logical network identifier from the user identity.
  • the network side After the mobile station establishes an 802.11 association with the network side, according to the security parameters negotiated during the association, the network side initiates a corresponding authentication request to the mobile station, and responds to the user identity carried by the mobile station response message.
  • T N2005/002354 identifies the logical network identity to select the logical network to access.
  • a logical network selection unit is required between the 802.11 association and the logical network association to complete the 802.11 associated mobile station to select the corresponding logical network.
  • the functional structure of a logical access controller supporting multiple logical networks in a physical WLAN network is shown in Figure 4.
  • the logical access controller includes an 802.11 association unit, a logical network selection unit, and a logical network association unit.
  • the 802.11 association unit is configured to establish an 802.11 association with a mobile station in the network, and the association process depends on or does not depend on the service set with the logical network.
  • the identity (SSID) matches, after the association is established, the 802.11 association unit sends an authentication request and a response response message to the mobile station.
  • the logical network selecting unit is configured to obtain a logical network identifier from a response packet received by the 802.11 association unit, select a logical network to which the mobile station belongs according to the identifier, and send an authentication request to the corresponding logical network association unit; the logical network association The unit is configured to respond to the authentication request of the logical network selection unit to complete authentication and related key agreement between the mobile station and the logical network to which the mobile station belongs.
  • the logical access controller can be set in the AP or in the access controller (AC).
  • the division of the logical network is completed by the logical network selection unit, and the mobile station finally accesses to a logical network to be associated via the logical network.
  • the function of the logical network association unit is mainly to complete the identity authentication and related key agreement between the logical network and the mobile station. After completing the logical network association, the mobile station can obtain the logical network related services.
  • security parameters are negotiated between the network and the mobile station.
  • the operation of the logical network selection unit depends on the security parameters negotiated between the network and the mobile station.
  • the mobile station access authentication method the following standards exist:
  • a WLAN network can support only one of the above or multiple authentication methods at the same time.
  • One logical network supports only one of the authentication methods.
  • there are some other authentication methods such as a browser-based hijacking authentication method, that is, when a mobile station initiates a Dynamic Host Configuration Protocol (DHCP) request to obtain an IP address, a browser redirecting the network, pushing An authentication page is sent to the mobile station, so that the user can enter the user name and password to authenticate the user's legality.
  • DHCP Dynamic Host Configuration Protocol
  • the working principle of the logical network selection unit is: when the mobile station is associated with the AP, the corresponding protocol is started according to the negotiated security parameters and the logical network identifier to be accessed by the mobile station is obtained, and the corresponding logical network associated functional entity completes the subsequent operation. Authentication, the security mechanism of the corresponding logical network must support the security parameters negotiated by the 802.11 association. Binding 802.11 associations to logical network associations through logical selection units.
  • the flow of the mobile station accessing the logical network is as follows:
  • the first is to establish an 802.11 association, and the security parameters are negotiated during the establishment of the association process.
  • the network side can support multiple security mechanisms at the same time or only one of them.
  • the network side obtains the network identifier reported by the mobile station according to the negotiated access authentication mode (for example, WAPI, 802.1X, or other authentication mode), and creates a logical network association entity according to the network identifier, and completes the authentication process.
  • the association of the mobile station to the logical network is established.
  • these mobile stations When the mobile station does not support the corresponding WLAN security standard but the network allows it to access, these mobile stations directly access a default logical network, associate with the default logical network, and deploy access within the default logical network. Server to complete further user authentication or authentication free.
  • the mobile station user identifier can identify a logical network association.
  • a logical network association is bound to the corresponding 802.11 association and contains relevant security parameters that will support encryption and decryption of the air interface.
  • the logical network selection process is as follows: After the association is established, the network side sends an 802.1X authentication request 802.1X EAP Request, and the mobile station returns an 802. IX authentication response 802.1X EAP Response, where The carried user identifier includes the logical network identification information.
  • the logical network selection layer entity on the network side sends an 802.1X authentication request to the logical network associated entity of the corresponding logical network according to the network identifier, and the logical network associated entity authenticates the 802.1X through the Radius protocol.
  • the request is forwarded to the authentication server in the logical network.
  • the subsequent authentication process is performed directly between the mobile station and the authentication server.
  • the authentication server sends the EAP authentication success information and the negotiated key material to the logical network associated entity. Then, the logical network association entity and the mobile station generate a corresponding unicast key and a multicast key through an 802.1X dynamic key agreement process according to the master key negotiated during authentication. After the key negotiation is completed, the logical network association is established and the mobile station is officially joined. When the corresponding logical network is reached, the related services, resources and services of the logical network can be obtained.
  • the logical network selection selection process is: After the association is established, the network side sends the authentication activation to the mobile station, and the mobile station returns an access authentication request message, where the carried user certificate includes Logical network identification information, the logical network selection layer entity on the network side sends an access authentication request to the logical network association entity of the corresponding logical network according to the network identifier, and the logical network association entity passes the certificate of the own network together with the certificate of the mobile station through the certificate authentication request. Sended to the authentication server in the logical network, the authentication server verifies the validity of the certificate, and returns the certificate authentication response, and the logical network associated entity returns the mobile station access authentication response.
  • the encryption key is negotiated between the logical network associated entity and the mobile station. After the key negotiation is completed, the logical network association is established, and the mobile station is officially added to the corresponding logical network, and the related services, resources, and services of the logical network can be obtained.
  • the network side does not support 802. IX and does not support WAPI, then at this time, for the WLAN network, after the association is completed, the data packets transmitted to the air interface will not be restricted.
  • all users who do not support the 802.1X and WAPI standards can be regarded as a logical network user without distinction (or only the default logical network), in which the logical network domain can be accessed through an access server. Complete relevant user certification.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de prise en charge de réseaux logiques multiples dans un réseau local sans fil (WLAN) qui permet de résoudre les problèmes très complexes et l'augmentation de la surcharge des ressources radio liés à la technique connue de prise en charge de réseaux logiques multiples par un réseau WLAN. Lorsque le procédé établit une association 802.11 entre le réseau WLAN et la station mobile, le côté réseau obtient l'ID du réseau logique auquel appartient ladite station mobile, et accède à la station mobile du réseau logique correspondant conformément à l'ID du réseau logique. Par ailleurs, l'invention concerne une commande d'accès logique qui comprend une unité d'association 802.11, une unité de sélecteur de réseau logique et une unité d'association de réseau logique.
PCT/CN2005/002354 2005-01-13 2005-12-29 Procede et dispositif de prise en charge de reseaux logiques multiples dans un reseau wlan WO2006074592A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200510001959.8 2005-01-13
CN200510001959 2005-01-13
CN200510008721A CN100579042C (zh) 2005-01-13 2005-02-24 在无线局域网中支持多个逻辑网络的方法及装置
CN200510008721.8 2005-02-24

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CN101860856A (zh) * 2010-04-21 2010-10-13 杭州华三通信技术有限公司 一种无线局域网中提供差异化服务的方法和设备
CN103888941A (zh) * 2012-12-20 2014-06-25 杭州华三通信技术有限公司 一种无线网络密钥协商的方法及装置
CN115037520A (zh) * 2022-05-11 2022-09-09 新华三技术有限公司 一种终端认证方法及装置

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CN101364909B (zh) * 2007-08-07 2011-04-13 华为技术有限公司 无卡设备接入个人网络的方法、装置及系统
CN102196428B (zh) * 2007-08-07 2013-08-28 华为技术有限公司 无卡设备接入个人网络的方法、装置及系统
CN102088388B (zh) * 2009-12-02 2014-04-02 上海贝尔股份有限公司 自动分配/获取虚拟局域网配置信息的方法及设备
WO2013181830A1 (fr) * 2012-06-07 2013-12-12 宇龙计算机通信科技(深圳)有限公司 Dispositif de communication d'identificateurs d'association et procédé de communication d'identificateurs d'association
FR2992811A1 (fr) * 2012-07-02 2014-01-03 France Telecom Mise en place d'une association de securite lors de l'attachement d'un terminal a un reseau d'acces
US10687338B1 (en) * 2017-07-10 2020-06-16 Cisco Technology, Inc. Adaptive wireless network feature support

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CN101860856A (zh) * 2010-04-21 2010-10-13 杭州华三通信技术有限公司 一种无线局域网中提供差异化服务的方法和设备
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CN103888941A (zh) * 2012-12-20 2014-06-25 杭州华三通信技术有限公司 一种无线网络密钥协商的方法及装置
CN103888941B (zh) * 2012-12-20 2018-03-06 新华三技术有限公司 一种无线网络密钥协商的方法及装置
CN115037520A (zh) * 2022-05-11 2022-09-09 新华三技术有限公司 一种终端认证方法及装置

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CN1805391A (zh) 2006-07-19

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