CN1802839A - 通过无线局域网向移动站提供网络服务信息的方法和装置 - Google Patents

通过无线局域网向移动站提供网络服务信息的方法和装置 Download PDF

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CN1802839A
CN1802839A CNA2004800020620A CN200480002062A CN1802839A CN 1802839 A CN1802839 A CN 1802839A CN A2004800020620 A CNA2004800020620 A CN A2004800020620A CN 200480002062 A CN200480002062 A CN 200480002062A CN 1802839 A CN1802839 A CN 1802839A
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CN1802839B (zh
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约翰纳·维尔德
拉杰什·帕日亚努尔
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Motorola Solutions Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
    • 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
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3226—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using a predetermined code, e.g. password, passphrase or PIN
    • 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
    • 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]

Abstract

一种无线局域网(WLAN)通信系统(300)，包括与移动站(302)通信的接入点(308)以及至少一个鉴别、授权、结算(AAA)服务器(314、318)，提供鉴别过程，由此移动站用户可以在被鉴别之前从一个或多个WLAN服务提供商和/或一个或多个3GPP服务提供商(322、324)中选择WLAN服务提供商，进而根据与所选服务提供商相关联的、除了服务集标识符(SSID)之外的网络服务信息来作出订制所选服务提供商的服务的决定。

Description

通过无线局域网向移动站提供网络服务信息的方法和装置
技术领域
本发明一般涉及无线局域网，具体涉及由无线局域网基础设施向移动站提供网络覆盖、网络可接入性和网络服务信息。
背景技术
局域网(LAN)允许组织在高速网络上共享信息，其可以由相对便宜的硬件组件来组装。LAN还通过允许LAN内的多用户通过对所有用户公用的接口连接到LAN外多个网络中的每个，来提供相对便宜的硬件连接给超出LAN的网络。直到近来，LAN受限于硬连线的基础设施，需要用户通过有线连接物理上连接到LAN。但是，随着无线技术和无线消息传递的近来的发展，无线通信也被用于LAN领域，导致无线局域网(WLAN)的发展。
图1是现有技术的示例无线局域网(WLAN)通信系统100的框图。通信系统100包括WLAN，其包括基本服务集(BSS)104，BSS又包括一个或多个接入点(AP)106、108(示出了两个)。与BSS 104相关联的是服务集标识符(SSID)，该SSID为BSS 104中每个AP 106、108所公有，并由BSS 104中每个AP 106、108储存，起到BSS的标识符的作用。WLAN，尤其是一个或多个AP 106、108中的每个，连接到鉴别(Authentication)、授权(Authorization)、结算(Accounting)(AAA)服务器110，AAA服务器110向WLAN提供鉴别、授权、结算服务。AAA服务器110包括数据库112，其储存与授权接入WLAN的每个移动站(MS)相关联的标识符，并且进一步储存与每个标识符相关联的密码。
当MS 102希望接入WLAN时，MS首先必须建立和配置与一个或多个AP 106、108中的一个AP的链路，通常通过主动或被动扫描WLAN来完成。在主动扫描中，MS 102通过广播探测请求(ProbeRequest)来开始建立和配置链路。探测请求包括服务集标识符(SSID)以及MS所支持的功能和数据率。一旦接收到探测请求，一个或多个AP 106、108中的每个AP确定探测请求中包含的SSID是否同与AP相关联的SSID相同。当SSID相同时，AP响应探测请求，发送探测响应回到MS，其包括与AP相关联的SSID以及AP所支持的功能和数据率。基于接收到的探测响应，MS 102从一个或多个AP 106、108中选择最佳AP，诸如AP 106，并且发送关联请求到所选的AP 106，其包括SSID，还包括MS所支持的功能和数据率。一旦接收到关联请求，AP 106发送关联响应到MS 102，其包括唯一关联于AP的标识符，即AP地址，和AP将要支持的功能和数据率，并且建立MS和所选AP之间的链路。
在被动扫描中，不利用探测请求和探测响应，MS 102可以选择AP并发送关联请求到所选AP，以响应于接收到一个或多个AP 106、108中每个断断续续地发射的信标(Beacon)。类似于探测响应，每个信标包括与AP相关联的SSID以及AP所支持的功能和数据率。
在建立了MS 102和AP 106之间的链路之后，在对MS 102授权发送数据业务到AP 106(即，不封锁对WLAN的接入)之前必须鉴别MS 102。图2是现有技术的WLAN鉴别过程的信号流图200。鉴别过程开始于MS 102发送EAPOL(Extensible Application Protocol OverLAN，局域网可扩展应用协议)-开始消息202到AP 106。响应于接收到EAPOL-开始消息202，AP 106发送EAPOL-EAP(ExtensibleApplication Protocol，可扩展应用协议)-请求/识别消息204到MS 102。EAPOL-EAP-请求/识别消息204从MS请求鉴别信息，诸如唯一关联于MS的标识符和密码。一旦接收到EAPOL-EAP-请求/识别消息204，MS 102发送EAPOL-EAP-响应/识别消息206到AP 106，其提供了所请求的信息。
一旦接收到EAPOL-EAP-响应/识别消息206，AP 106将MS 102所提供的标识符和密码通过半径(RADIUS)-EAP-响应/识别消息208转发到AAA服务器。一旦接收到识别消息，AAA服务器110选择EAP鉴别方法。该方法包括一轮或多轮的EAP鉴别请求消息210、212，从AAA服务器110传送到MS 102，以及作为响应的EAP鉴别响应消息214、216，从MS传送到AAA服务器。EAP消息在AAA服务器110和AP 106之间携带在半径消息中，在AP 106和MS 102之间携带在EAPOL消息中。在鉴别请求和鉴别响应的最终交换的结束处，AAA服务器110基于储存在数据库112中的一个或多个公知的用户标识符，诸如密码、共享秘密、公钥或数字证书，来鉴别MS 102。如果AAA服务器110能够成功地鉴别MS 102，那么AAA 110将半径-EAP-成功消息218传送到AP 106。一旦接收到半径-EAP-成功消息218，AP106将EAPOL-EAP-成功消息220传送到MS 102，并且不再封锁对MS102的接入。如果AAA服务器110不能成功鉴别MS 102，则AAA服务器将半径-EAP-失败消息传送到AP 106，AP 106继续封锁对MS102的接入。
随着WLAN逐渐普及，WLAN建立在更多数量的商业设施和公共场所中，诸如咖啡馆、机场、图书馆、学校以及会议中心。由于订制不同服务提供商的服务的不同人群在这些场所表达了希望接入WLAN服务的需求，因此对于提供商来说，将发展需要以提供交叠服务。但是，当前对于AP的共享并没有规定任何过程。相反地，在当前最新技术中，每个提供商提供独立的AP，其配置以自己的SSID并且广播该SSID。这样的系统十分浪费，因为它迫使服务提供商提供冗余的系统。而且，提供WLAN服务的可用带宽是有限的，主要的WLAN场所，诸如机场和会议中心，可能不具有足够的带宽来支持多个服务提供商中每个所使用的交叠AP。
此外，当前最新技术仅仅允许用户根据SSID来选择服务提供商。当用户能够接入多个服务提供商的每个的网络时，SSID独自不可能向用户提供足够的信息来作出有关使用哪个服务提供商的充分有见识(fully informed)的决定。而且，当用户执行被动扫描时，用户可能不得不在选择与所需服务提供商相关联的SSID之前扫描和处理多个信标，消耗了向MS供电的有限寿命电池的过多的电量。
因此，需要一种方法和装置，允许接入WLAN的MS用户根据一个或多个标准，诸如每个服务提供商所支持的服务、服务价格、付费方法、访问的网络提供商和用户的归属网络之间的关系，从多个服务提供商中选择服务提供商，并进一步允许多个服务提供商共享AP。
附图说明
图1是现有技术的示例无线局域网的框图。
图2是现有技术鉴别过程的信号流图。
图3是根据本发明实施例的无线通信系统的框图。
图4是根据本发明实施例的图3的移动站的框图。
图5是根据本发明实施例的图3的无线通信系统所执行的鉴别过程的信号流图。
具体实施方式
为了解决上述需要，即一种方法和装置，用于允许接入无线局域网(WLAN)的MS用户根据一个或多个标准，诸如每个服务提供商所支持的服务、服务价格、付费方法、访问的网络提供商和用户的归属网络之间的关系，从多个服务提供商中选择服务提供商，并进一步允许多个服务提供商共享AP，提供一种WLAN通信系统，其包括与移动站通信的接入点，至少一个鉴别、授权、结算(AAA)服务器提供鉴别过程，由此移动站用户可以在被鉴别之前从一个或多个WLAN服务提供商和/或一个或多个3GPP服务提供商中选择WLAM服务提供商，进一步根据与所选服务提供商相关联的、除了服务集标识符(SSID)之外的网络服务信息来作出订制所选服务提供商的服务的决定。
一般地，本发明的实施例包括一种用于向接入无线局域网的移动站用户提供网络服务信息的方法。该方法包括接收鉴别移动站的请求，作为对接收到请求的响应，传送关于多个服务提供商中每个服务提供商的网络识别和服务信息到移动站。
本发明的另一个实施例包括一种用于接入无线局域网的方法。该方法包括传送鉴别移动站的请求，接收关于服务提供商的网络识别和服务信息，以及根据接收到的网络识别和服务信息来确定是否接入该无线局域网。
本发明又一个实施例包括一种无线局域网中的接入点。接入点包括存储器和连接到存储器的处理器。存储器储存与多个服务提供商中的每个服务提供商相关联的标识符和网络服务信息，并将一个或多个消息传送到移动站。
通过参考图3-5可更加全面地描述本发明。图3是根据本发明实施例的无线通信系统300的框图。通信系统300包括无线局域网(WLAN)304，其包括具有一个或多个接入点(AP)308(示出了一个)的基本服务集(BSS)306。AP 308提供无线通信服务给用户设备(UE)，也就是，移动站(MS)，诸如MS 302，其位于AP所服务的覆盖区域内。优选地，MS 302是便携、移动、或蜂窝通信设备，诸如但不限于蜂窝电话、无线电话、或无线调制解调器，其包括在数据终端设备内或连接到数据终端设备，诸如个人电脑、笔记本电脑、工作站、打印机、或传真机，其能够在WLAN通信系统中工作。BSS 306和AP 308是由能够与WLAN网络交互的多个公共和/或专用网络服务提供商322、324(示出了两个)所共享的，也就是说，代表这多个公共和/或专用网络服务提供商322、324来提供无线通信服务，这些服务提供商诸如但不限于，3GPP(第三代合作项目)、3GPP2、和企业网络服务提供商，其允许MS与有效连接到AP的相应的外部网络进行通信。
通信系统300还包括一个或多个鉴别、授权、结算(AAA)服务器314、318(示出了两个)，其有效连接到WLAN 304，具体连接到AP 308，并且提供鉴别、授权和结算服务给WLAN。多个AAA服务器314、318的每个AAA服务器都与关联于BSS 306和AP 308的多个服务提供商322、324之一相关联。每个AAA服务器314、318包括各自的数据库316、320，其储存与被授权接入WLAN 304的每个移动站(MS)相关联的标识符，进一步地，关联于每个标识符，储存密码和相关付费信息，诸如与MS相关联的归属服务提供商。在本发明的另一实施例中，AP 308，或BSS 306和AP 308，可以仅代表单一的WLAN服务提供商，诸如服务提供商322，来提供无线通信服务。
AP 308包括处理器310，诸如一个或多个微处理器、微控制器、数字信号处理器(DSP)、其组合或者本领域普通技术人员已知的这样的其他设备。AP 308还包括与处理器相关联的一个或多个存储设备312，诸如随机存取存储器(RAM)、动态随机存取存储器(DRAM)、和/或只读存储器(ROM)或其等价物，其储存可由处理器执行的数据和程序。存储设备312还关联于与AP相关的每个服务提供商322、324，储存服务提供商标识符或网络标识符、优选储存服务集标识符(SSID)，以及网络服务信息，诸如关于服务提供商所支持的服务的信息、服务提供商所支持的每项服务的价格、为所提供的服务付费的方法、以及每个服务提供商与用户的归属服务提供商之间的关系，诸如其他服务提供商(即，归属网络)的订户使用该服务提供商网络(即访问网络)时该服务提供商所征收的任何额外费用。
图4是根据本发明实施例的MS 302的框图。MS 302包括连接到处理器404的用户接口402，处理器404诸如一个或多个微处理器、微控制器、数字信号处理器(DSP)、其组合或者本领域普通技术人员已知的这样的其他设备。用户接口402向MS的用户提供与MS交互的能力，包括输入指令到MS。在本发明的一个实施例中，用户接口402包括显示屏幕，其包括触摸屏，触摸屏能够确定用户在触摸屏上触摸的位置(即X坐标和Y坐标)，并把位置数据传送到处理器404。根据位置数据，处理器404随后将用户的触摸转换成指令。在本发明的另一个实施例中，用户接口402可包括显示屏幕和键盘。
MS 302还包括与处理器404相关联的一个或多个存储设备406，诸如随机存取存储器(RAM)、动态随机存取存储器(DRAM)、和/或只读存储器(ROM)或其等价物，其储存可由处理器执行的数据和程序。存储设备406还储存唯一关联于MS的MS标识符以及SSID和相应的鉴别标识符，诸如密码、共享秘密、公钥、数字证书等等，关联于每个服务提供商，诸如MS 302所订制的一个或多个服务提供商322、324。此外，存储设备406储存用于组装MS与WLAN 304所交换的消息的指令。
优选地，通信系统300根据用于WLAN通信系统的电气电子工程师协会(IEEE)802.11标准、尤其是根据IEEE P802.1X/D11和802.11i/D2标准来工作，该标准在此整体结合进来，其可以从IEEE行政办公机构(Piscataway，NJ)或者通过standards.ieee.org在线获得。此外，通信系统300优选还根据第三代合作项目(3GPP)对于WLAN-蜂窝交互标准(TR 22.934和TR 23.934)的要求工作，该标准可从ETSI的3GPP处(Mobile Competence Centre，650，route des Lucioles，06921Sophia-Antipolis Cedex，France)或通过3gpp.org在线获得，还有因特网工程任务组(IETF)RFC(请求注解)2284，其可以从IETF办公机构(Reston，VA)或者通过ietf.org/rfc在线获得，其描述了媒介接入控制(MAC)层可扩展鉴别协议(EAP)，提供了鉴别协议的MAC层协商，用于在允许网络层协议通过链路发送之前鉴别对等设备，这些标准和协议，以及IETF备忘录“EAP AKA Authentication”，H.Haverinen，February 2002，和“EAP SIM Authentication”，H.Haverinen，June 2002都在这里整体结合进来。
为了让MS 302接入WLAN 304，MS首先根据公知的链路建立和配置技术建立与WLAN的链路。一旦建立了这条链路，通信系统300在授权MS发送数据业务之前鉴别MS 302。在现有技术中，为了订制WLAN的服务，鉴别过程仅仅允许MS用户根据相关服务提供商的SSID作出订制决定。跟现有技术不同，通信系统300提供了鉴别过程，从而MS 302的用户可以在被鉴别之前从一个或多个WLAN服务提供商和/或一个或多个3GPP服务提供商中选择WLAN服务提供商，进而根据与所选服务提供商相关联的、除了服务集标识符(SSID)之外的网络服务信息作出订制所选服务提供商的服务的决定。
图5是根据本发明实施例的通信系统300所执行的鉴别过程的信号流图500。鉴别过程开始于MS发送鉴别步骤开始消息502，优选为EAPOL(局域网可扩展应用协议)-开始消息，到WLAN 304，具体是到AP 308。一旦接收到鉴别步骤开始消息502，AP 308，具体是AP的处理器310，从存储器312中提取关于与AP相关联的每个服务提供商(诸如服务提供商322和324)的网络识别和服务信息。AP 308随后在网络识别和服务信息消息504、优选为EAPOL-EAP-请求/信息消息中将提取的网络识别和服务信息传送到MS 302。
一旦接收到网络识别和服务信息消息504，MS 302在用户接口402的显示屏幕中显示508关联于相应服务提供商322、324的至少一部分的接收到的网络识别和服务信息。通过显示网络识别和服务信息，MS 302允许MS用户作出关于订制服务提供商用于特定通信会话的有见识的(informed)选择，而不是局限于仅仅根据SSID就作出选择。而且，通过在鉴别过程的开始处向MS 302提供对应于与AP 308相关联的每个服务提供商322、324的网络识别和服务信息，系统300减少了MS 302通过向AP提供单一SSID并反过来接收对应于所提供的SSID的网络服务信息而单独恳请与BSS相关联的每个服务提供商的网络服务信息的需要。
根据在MS 302的用户接口402上显示的信息，MS用户随后能够决定是否接入WLAN 304。一旦确定接入WLAN，用户向MS 302输入，同时MS从用户接收508，对服务提供商的选择。例如，用户可能通过选择用户接口的显示屏幕上显示的软按键或者文本消息或者通过按下用户接口的键盘上的按键来输入他或她的选择。在本发明的另一个实施例中，其中，AP 308只代表单一的服务提供商提供无线通信服务，MS 302用户可能不需要输入服务提供商的选择，而是输入希望接入WLAN 304的指示。在本发明又一个实施例中，MS的用户或卖家可能在MS 302的存储设备406中储存服务偏好。储存的偏好可能随后由MS 302用于自动选择服务提供商或根据MS从AP 308所接收到的网络和服务信息确定是否接入WLAN 304。
一旦接收到网络服务信息消息504，MS 302通过传送确认510、优选为EAPOL-EAP-响应/信息/ACK消息回到AP 308来确认消息的接收。一旦接收到确认510，AP 308将消息512传送到MS 302，从MS请求鉴别信息，诸如唯一关联于MS的标识符、与所选服务提供商相关联的SSID、和密码。优选地，请求鉴别信息的消息512是EAPOL-EAP-请求/识别消息。一旦接收到请求鉴别信息的消息512并且一旦从MS用户接收到对服务提供商的选择、接收到用户希望接入WLAN304的指示、或自动选择了服务提供商或确定接入WLAN 304，MS 302就发送提供请求的鉴别信息的消息514，优选为EAPOL-EAP-响应/识别消息，其包括所选网络的标识符、即SSID，以及至少一部分的接收到的网络识别和服务信息。通过提供SSID和至少一部分的接收到的网络识别和服务信息，MS 302向WLAN 304、具体是AP 308提供所选的服务提供商。根据从MS接收的SSID和信息，WLAN能够确定合适的AAA服务器314、318用于鉴别MS。
一旦接收到请求的鉴别信息，AP 308能够确定合适的AAA服务器314、318来进行鉴别。AP 308随后在鉴别信息消息516、优选为半径-EAP-响应/识别消息中将MS 302所提供的标识符和密码转发给与所选服务提供商相关联的AAA服务器，诸如AAA服务器314。类似于通信系统100，一旦接收到鉴别信息消息516，AAA服务器314就选择EAP鉴别方法，AAA服务器就要通过该方法鉴别MS 302。EAP鉴别方法包括一轮或多轮的EAP鉴别请求消息518、520，其分别从AAA服务器314传送到AP 308和从AP 308传送到MS 302，而作为响应，还包括EAP鉴别响应消息522、524，分别从MS到AP和从AP到AAA服务器。在本发明的一个实施例中，EAP消息是MAC层消息或数据链路层消息，其携带在AAA服务器314和AP 308之间的半径协议消息以及AP 308和MS 302之间的EAPOL消息中。在本发明的另一实施例中，在AAA服务器314和AP 308之间交换的EAP消息是MAC层消息或数据链路层消息，其携带在直径(Diameter)协议消息中。
在鉴别请求和鉴别响应的最终交换的结尾处，AAA服务器314根据储存在AAA数据库316中的一个或多个公知鉴别标识符，诸如密码、共享秘密、公钥、或数字证书，来鉴别MS 302。如果AAA服务器314能够成功鉴别MS 302，则AAA服务器314传送授权消息526、优选为半径-EAP-成功消息，到AP 308，用于授权AP不再封锁对MS302的接入。一旦接收到授权消息526，AP 308传送授权消息528、优选为EAPOL-EAP-成功消息，到MS 302，用于授权MS接入WLAN304并解除对MS 302的接入的封锁。如果AAA服务器314不能成功鉴别MS 302的话，则AAA服务器传送授权失败消息532、优选为半径-EAP-失败消息，到AP 308。在此情况下，AP 308继续到框534接入MS 302。
总而言之，WLAN通信系统300提供了鉴别过程，由此MS 302用户可以在被鉴别之前从共享WLAN的一个或多个WLAN服务提供商和/或一个或多个3GPP服务提供商322、324中选择WLAN服务提供商，进而根据与所选服务提供商相关联的、除服务集标识符(SSID)之外的网络服务信息，作出订制所选服务提供商的服务的决定。作为鉴别过程的一部分，WLAN 304向MS提供关于一个或多个服务提供商的网络识别和服务信息，诸如每个服务提供商所支持的服务、服务价格、付费方法、以及访问的网络提供商和用户的归属网络之间的关系，从而允许MS用户作出关于WLAN服务提供商的有见识的选择。MS可随后从这一个或多个服务提供商中选择服务提供商并且通过向WLAN传送相关SSID和至少一部分的接收到的网络识别和服务信息来通知WLAN所选的服务提供商。根据从MS接收到的SSID和信息，WLAN能够确定合适的AAA服务器314、318，用于鉴别MS。
尽管本发明具体通过结合特定其实施例而显示和描述，但本领域技术人员将理解，可以作出各种变化以及进行要素的等价替换，这并不偏离本发明如权利要求所述的范围。因此，说明书和附图都应被视为说明性的而非限制性的，所有这样的变化和替换都包括在本发明的范围之内。
上面已经关于特定实施例描述了益处、其他优点、和问题的解决方案。但是，益处、优点、问题的解决方案，以及任何能够引起任何益处、优点或解决方案，或者使之出现或变得更显著的要素都不应被视作是任意或所有权利要求的决定性的、必需的或者关键的特征或要素。如这里所使用的，术语“包括、包含”或其任何变形，都意欲覆盖非排他性的包含，因此，包括一系列要素的过程、方法、物品或装置不仅仅包括那些列出的要素，还有可能包括其他未明确列出或者这样的过程、方法、物品或装置所固有的其他要素。还应当理解，关系术语的使用(如果有的话)，诸如第一和第二、顶和底等等，都仅仅是用来区分一个实体或行为与另一个实体或行为，而不必要求或暗示这样的实体或行为之间的任何实际的这样的关系或顺序。

Claims (11)

1.一种用于提供网络服务信息给接入无线局域网的移动站用户的方法，包括：
接收鉴别移动站的请求；和
作为对接收到上述请求的响应，传送关于多个服务提供商中每个服务提供商的网络识别和服务信息到移动站。
2.如权利要求1所述的方法，其中，鉴别移动站的请求与网络识别和服务信息每个都是在媒介接入控制层消息中传送的。
3.如权利要求1所述的方法，进一步包括：
请求鉴别信息；和
接收包括对从多个服务提供商中选择服务提供商的选择的鉴别信息。
4.如权利要求3所述的方法，进一步包括：
根据接收到的鉴别信息来确定鉴别、授权、结算服务器；和
通过确定的鉴别、授权、结算服务器来请求对移动站的授权。
5.一种用于接入无线局域网的方法，包括：
传送鉴别移动站的请求；
接收关于服务提供商的网络识别和服务信息；和
根据接收到的网络识别和服务信息来确定是否接入无线局域网。
6.如权利要求5所述的方法，其中，鉴别移动站的请求与网络识别和服务信息每个都是在媒介接入控制层消息中传送的。
7.如权利要求5所述的方法，其中，接收关于服务提供商的网络识别和服务信息包括接收关于多个服务提供商中的每个服务提供商的网络识别和服务信息，并且其中，该方法进一步包括：
接收对鉴别信息的请求；和
传送对从多个服务提供商中选择服务提供商的选择。
8.一种无线局域网中的接入点，包括：
存储器，储存关联于多个服务提供商中每个服务提供商的服务提供商标识符和网络服务信息；和
处理器，连接到存储器，组装一个或多个消息，所述消息包括与多个服务提供商中每个服务提供商相关联的服务提供商标识符和网络服务信息，并将这一个或多个消息传送到移动站。
9.如权利要求8所述的接入点，其中，所述一个或多个消息包括第一一个或多个消息，并且其中，所述处理器接收鉴别移动站的请求，作为对接收到该请求的响应，组装所述第一一个或多个消息，进而组装包括对鉴别信息的请求的第二消息，然后将所述第二消息传送到移动站。
10.如权利要求9所述的接入点，其中，所述处理器进而响应于传送对鉴别信息的请求，接收所请求的鉴别信息，而且，作为对接收到所请求的鉴别信息的响应，组装请求对移动站的授权的第三消息，然后将所述第三消息传送到服务器。
11.如权利要求10所述的接入点，其中，所述存储器，关联于服务器，储存服务提供商标识符，其中，所接收到的鉴别信息包括服务提供商标识符，并且其中，所述处理器根据所接收到的服务提供商标识符来确定所述服务器。
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KR20050099971A (ko) 2005-10-17
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