CN101606398B - 安全位置会话管理器 - Google Patents
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Abstract
安全位置会话管理器(SLSM)是当在诸如无线运营商网络内的活跃-活跃冗余配置等分布式环境中部署多个地理上不同SUPL服务器时最佳地实现的用于开放移动联盟(OMA)安全用户平面定位(SUPL)版本1.0(和随后版本)消息的智能路由器。在独立选项中,SLSM充当移动设备与负责的SUPL服务器之间的所有SUPL定位消息的中间人。在嵌入式选项中,SLSM存在于现有服务器内。SLSM出于路由和负载均衡的目的而管理所有悬而未决的和正在进行的SUPL定位会话的会话信息并将其存储在内部表中。SLSM的外部接口由OMA ULP消息组成。
Description
本申请要求Ghozati等人的于2006年11月13日提交的题为“SUPL Intelligent Session Router”的美国临时专利申请No.60/858,337的优先权,通过引用而将其全部内容明确地并入本文。
技术领域
本发明涉及基于位置的业务(LBS)、辅助全球定位系统(A-GPS)、以及安全用户平面定位(SUPL)服务。
背景技术
对于其当前位置被请求的移动设备,通过网际协议(IP)网络来交换多个消息。在移动设备与位置服务器之间传递消息以确定移动设备的位置。
然而,在分布式服务器环境中,基于当前IP的位置服务系统未提供安全且稳定的方法以允许将属于同一定位请求的消息路由到正确的服务器。在这种环境中,不保证将属于同一位置会话的消息路由到发起会话的正确服务器,常常导致失败的定位请求。已知的常规系统未提供一种管理分布式服务器环境中的位置会话的标准和有效方法。
当在分布式服务器之一中接收到未经请求(偶然)的消息时正确地路由消息的一种可能方法将是向分布式服务器网络中的所有服务器进行广播。然而,这将是费力的且浪费通信及处理资源。此外,广播消息的数目将随着分布式服务器数目的增加而呈指数增长。
安全用户平面(层面)定位(SUPL)是已被开发以允许移动手机客户端与位置服务器通信的基于标准的协议。SUPL规范是由开放移动联盟(OMA)标准工作组定义的。关于OMA SUPL呼叫流程的更多细节请参见OMA安全用户平面定位架构文献、OMA-AD-SUPL-V1_0-20060127-C;以及OMA用户平面定位协议文献OMA-TS-ULP-V1_0-20060127-C。
OMA SUPL版本1规定以下基本呼叫流程:
(1)SUPL网络发起(NI)呼叫流程,且(2)SUPL SET发起(SI)呼叫流程。
图9示出用于SUPL定位请求的典型OMA移动台终止呼叫流程。
特别地,如图9所示,在存在于网络中的SUPL代理802、卫星基准服务器804、SUPL服务器806、PPG 808、以及SUPL使能终端(SET)812之间传输消息。
SUPL服务器(或SLP)806包括SUPL定位中心(SLC)和SUPL位置中心(SPC)。将移动设备广义化为SUPL使能终端(SET)812。SLC协调网络中的SUPL通信的操作并与SPC组件通信。SPC向SET812提供GPS辅助数据并执行SET 812的精确位置计算。
SLP可以以代理或非代理方式操作。在代理模式下,SET在精确位置定位计算期间使用SLC作为代理与SPC通信,而在非代理模式下,SPC直接与SET通信以执行精确的位置计算。
如图9所示,呼叫流量路由问题存在于网络发起的SUPL定位请求中。例如,网络发起的定位请求820经由MLP接口而到达SUPL服务器806。处理网络发起的请求的SUPL服务器806被要求向SET812发送触发消息822(SUPL INIT消息)以证实并发起SUPL定位会话828。触发消息822被作为来自PPG 828的推送消息824而发送到SET 812(或作为来自SMSC/MC的SMS消息)。在这点上,SET812需要建立到SUPL服务器806的安全TCP/IP连接以对SUPL定位请求作出响应。
然而,当无线提供商为了冗余而具有处于活跃-活跃配置中的多个SUPL服务器,则可以与未发起此交易的SUPL服务器建立来自SET 812的连接请求。这可以导致定位请求超时或终止。
虽然OMA用户平面定位协议规范(参考OMA用户平面定位协议文献,OMA-TS-ULP-V1_0-20060127-C)定义了SUPL INIT消息822内可以用于路由来自SET 812的入局SUPL消息的字段,但存在可能导致路由故障的漏洞。根据SUPL标准,会话ID是由两部分组成的唯一值:服务器部分(SLP会话ID)和手机部分(SET会话ID)。SLP 806可以指定其在SLP会话ID参数内以及在ULP SUPL INIT消息的可选“SLP地址”字段内的地址。然而,路由可能由于以下潜在原因而失败:第一,“SLP地址”字段对于代理模式来说是可选的,且SLP供应商可以选择不使用它。第二,一些SUPL服务器供应商可能将公共FQDN包括在不能被解析以路由到特定SUPL服务器实例的SLP会话ID中。此外,SET 812可以选择忽略SUPL INIT消息的“SLP地址”字段的值以有利于SET中的预先规定的SUPL服务器地址。此外,SUPL服务器806可以在“SLP地址”或“SLP会话Id”字段中指定其自己的本地接口地址,但是由于可能是其在虚拟LAN中的地址,所以不保证跨越运营商的地理上不同的网络是唯一的。
如果运营商仅使用单一的SUPL服务器806,则问题可能不明显,但通常情况不是这样。通常,无线运营商为了负载共享、冗余和保证服务可用性而具有多个地理上不同的SUPL服务器。当SET 812使用FQDN或预先规定的众所周知的SLP地址而连接到SUPL服务器806时,运营商的网络内的交换机/路由器试图解决到特定的SUPL服务器实例的请求。然而,存在这样的可能性,即接收来自SET的请求的SUPL服务器可能不是SUPL定位会话的发起者,由此引起许多网络发起的定位请求失败、超时或导致未定义行为。
以上问题的可能危及订户隐私的一种意外行为是当SUPL服务器806已具有高速缓存位置并试图获得来自SET 812的同意以便将高速缓存的位置返回到外部SUPL代理802时。如果在SLP 806处的通知和确认类型被设置为“allowed on no answer”且SET同意拒绝消息未能达到适当的SUPL服务器806,则SLP 806可以向未授权的外部实体公开高速缓存的SET位置。
发明内容
依照本发明的原理,一种位置会话管理器包括SUPL会话路由器、以及会话记录管理器。会话记录管理器在接收到从网络SUPL代理到移动设备的SUPL定位请求时创建SUPL会话记录。会话记录管理器还在接收到关于SUPL会话的后续消息时检索SUPL会话记录。会话记录管理器还在相应的SUPL会话完成时消除SUPL会话记录。
依照本发明另一方面的一种在包括多个SUPL服务器的网络中管理网络发起的SUPL定位请求的方法,包括在SUPL会话路由器中捕获网络发起的SUPL定位请求。通过SUPL会话路由器,在移动设备和所述多个SUPL服务器中被指定为处理SUPL定位请求的选定的一个SUPL服务器之间传递关于SUPL定位请求的后续消息。后续的消息发送被路由到所述多个SUPL服务器中处理SUPL定位请求的选定的一个SUPL服务器。
附图说明
通过参照附图的以下说明,本发明的特征和优点将变得对于本领域的技术人员来说显而易见,在附图中:
图1示出依照本发明原理的代理模式下的网络发起(基于SET或SET辅助)的非漫游成功呼叫流程。
图2示出依照本发明原理的代理模式下的SET发起(基于SET或SET辅助呼叫流程)的非漫游成功呼叫流程。
图3示出依照本发明原理的嵌入式会话管理,该嵌入式会话管理示出用于网络发起的非漫游代理模式、成功情况的从发起SLC到服务SLC的会话路由。
图4示出依照本发明原理的具有扩展协议中的完整统一资源定位符(URL)的独立会话路由器。
图5示出依照本发明原理,嵌入式会话管理示出使用相关密钥的会话路由。
图6示出依照本发明原理,独立会话路由器示出从SSR到发起SLP的会话路由器。
图7示出依照本发明原理,独立会话路由器示出从SSR到发起SLP的会话路由。
图8图解依照本发明原理的独立会话路由器(SSR)的示例性安全设置。
图9示出用于SUPL定位请求的典型OMA移动台终止呼叫流程。
具体实施方式
根据所部署的位置服务器的网络架构的性质,公开并实现了六种发明架构和方法。所公开的架构和方法中的每一种避免了与传统架构和方法相关的缺点,并保证消息到正确SLP(或SUPL服务器)的适当路由。虽然SET发起的(SI)呼叫流程不具有相对于网络发起的(NI)呼叫流程所述的类似路由问题,但本发明的使用导致与其它网络实体共享的负载均衡责任。
选项1:独立会话路由器-这里会话路由器管理会话。
选项2:现有服务器中的嵌入式会话路由-这里发起IP地址被嵌入SLP会话ID。
选项3:使用扩展协议中的完整URL的独立会话路由器。
选项4:扩展协议中的嵌入式会话相关密钥-这里用相关密钥来扩展SLP会话ID以保持用于网络发起请求的发起SLC的识别信息。
选项5:具有扩展协议中的相关密钥的独立会话路由器(SSR)-这里IP地址或识别参数被包括在新的相关密钥字段中并被SSR用来将网络发起的会话路由到发起SLP。
选项6:具有扩展协议中的附加相关密钥的独立会话路由器-这里包括在新的相关密钥字段中的IP地址或识别参数被添加到发出到SET的出局消息并被SSR用来将网络发起的会话路由到发起SLP。
选项1-独立会话路由器
独立会话路由器(SSR)是智能地在SET与SUPL服务器之间路由OMA SUPL定位消息的组件。SSR的主要职责是保证来自SET的OMA SUPL定位消息始终在SUPL服务器的正确实例处终止。
优选地,SSR是位于运营商网络中的冗余SUPL服务器与SET之间的空中接口独立组件。SSR拦截出局和入局SUPL消息并具有将平衡SUPL定位消息路由并装载到其各自目的地的内置能力。当同一运营商使用来自不同供应商的SUPL服务器时,SSR可以在运营商的网络内被用来路由SUPL消息。
SSR架构和方法不需要对SET或SUPL服务器的现有实施方式进行任何修改,并因此而可以无缝地集成到无线运营商的网络中。所公开的架构可以优选地与来自任何供应商的服从任何OMA SUPLVer.1的SUPL服务器以及来自任何供应商的服从任何OMA SUPLVer.1的SET互操作。
架构
当多个冗余、地理上不同的SUPL服务器被部署在无线运营商网络内的活跃-活跃配置中时,SSR充当用于OMA SUPL Ver.1.0消息的智能路由器。SSR充当SET与SUPL服务器之间的所有SUPL定位消息的中间人。SSR为了路由和负载均衡的目的而存储用于内部表中的所有悬而未决的和正在进行的SUPL定位会话的会话信息。SSR的外部接口只谈论和理解OMA ULP消息。
SUPL定位中心(SLC)充当用于SUPL服务器的网关。其负责管理到包括SET在内的其它网络节点的连接和保证最佳的网络性能。SLC模块包括以下主要组件:外部接口、会话管理、交易管理、高速缓存管理、以及网络位置接口。
外部接口支持Le接口并实现OMA移动位置协议(MLP)3.2.0。此接口充当SLC与外部位置服务客户端(即LCS客户端)之间的连接点。在所公开的实施方式中,外部接口通过接受推送访问协议(PAP)消息而直接连接到另一SUPL服务器。
会话路由功能为每个交易生成唯一会话ID并管理本地冗余系统内或跨越地理冗余系统的会话。
交易管理调节定位请求的流程以保护位置服务器本身和无线网络两者。通过使用交易管理,可以将系统配置为使处理定位请求的速率最优化。
高速缓存管理支持内部位置高速缓存的使用。可以将此高速缓存配置为允许使用高速缓存信息来服务于入局定位请求,因此提高系统的效率并节省网络资源。
网络位置接口与无线网络内的其它节点接口。网络位置接口支持所有标准的网际协议(IP)接口。Lup接口接受并管理由SET生成的ULP连接。WAP推送(push)将推送访问协议(PAP)消息格式化并将其发送到推送代理网关。
所公开的SUPL服务器优选地支持以下位置服务程序:网络发起的定位请求和SET发起的定位请求。位置服务应用程序通常发起网络发起的定位请求,且网络触发适当的程序以确定目标SET的位置。SET用具有来自网络的加密密钥的SET发起定位请求来请求其自己的位置或位置辅助数据。SUPL服务器要求支持多播业务传输的地理冗余站点之间的数据连接。
连接管理
当SET连接到SSR并请求SUPL定位消息的传递时,SSR建立与SUPL服务器实例的新TCP/IP连接。对于网络发起的(NI)呼叫流程,SSR基于所存储的路由信息来确定SUPL服务器实例。对于SET发起的(SI)呼叫流程,SSR基于内部负载共享算法来智能地识别SUPL服务器实例。
优选地,只要SET不断开与SSR的TCP/IP连接,或者如果连接由于不活动而超时,则保持与SUPL服务器的TCP/IP连接。
SSR具有协商并接受来自SET的安全TCP/IP(TLS)连接的能力。每个SSR加载有SET中规定的服务器根证书。另外,可以将SSR配置为对于每个入局SUPL会话建立与SUPL服务器的TLS会话,准确地摹拟SET。这加强了端到端安全性并避免对SUPL服务器的软件修改。
SSR可以支持来自同一SET的多重连接,并具有建立与SUPL服务器实例的多重(安全或非安全)连接的能力。
如果SET终止到SSR的TCP/IP(TLS)连接,SSR将消除用于该连接的所有会话路由记录并立即断开与SUPL服务器的相应TCP/IP连接。
另一方面,如果服务的SUPL服务器终止到SSR的TCP/IP(TLS)连接,则SSR将消除会话路由记录并立即断开与SET的相应TLS连接。优选地,SSR不基于错误条件而自己将SUPL END消息格式化。
冗余
因此,允许冗余,因为可以存在多个SSR实例,形成冗余配置。SSR的每个实例具有与其它对等SSR通信的能力。这可以根据特定的SSR配置而适当地通过专用的长期TCP/IP连接、多播接口、或任何其它协议来实现。
路由密钥
SSR的智能被存储在其内部路由表中。路由表条目是基于每个会话创建的,并且只要SUPL会话在活动就存在。路由条目在发起新SUPL定位会话(SI或NI)时被创建并在会话(成功地或错误地)完成时被消除。
SSR会话路由记录优选地具有以下字段。
ULP SET会话ID | ULP SLP会话ID | SSR SLP会话ID | MSISDN | 服务SLP地址 | SET连接ID | SLP连接ID |
只有在每个SUPL定位呼叫流程开始时,才需要检索或检查会话记录。对于网络发起的(NI)呼叫流程的情况,所检索的会话记录确定处理定位请求的SUPL服务器的实例。对于SET发起的(SI)呼叫流程,出于负载共享的目的而查询路由表以确定SUPL服务器实例。
可以在存储器中形成路由表,或者可以通过将信息存储在数据库或存储器映射文件中来使其持久。如果路由记录是非易失性的,则当SSR的实例异常停止工作时,会话信息不会丢失。
优选地,在SSR内自动清除陈旧的会话路由记录,并释放相关资源。
SSR SLP会话ID
SSR为每个新呼叫流程生成唯一SLP会话标识符。SSR创建其自己的SLP会话ID,因为跨越多个SUPL服务器来自SLP的SLP会话ID可能不是唯一的。这样,保证SSR生成的SLP会话ID跨越冗余部署配置中的所有SSR实例而是唯一的。唯一SSR SLP会话ID还使得运营商能够同时使用来自多个供应商的SUPL服务器。还将SSR生成的SLP会话ID增加为包括唯一标识符以帮助识别拥有会话记录的SSR。
当服务SSR未能检索特定网络发起(NI)的SUPL会话的路由信息时,其检查SSR生成的SLP会话ID并检索所有者SSR的地址。然后,服务SSR转让来自对等SSR的路由记录的所有权并完成SUPL会话呼叫流程。
在到SET的所有出局SUPL消息中,此SSR生成的SLP会话ID被SLP生成的SLP会话ID替换。在相反方向在到目标SUPL服务器的SUPL消息中,替换原始SLP会话ID。
网络发起的呼叫流程
为了支持网络发起的(NI)呼叫流程,可将会话路由器(即统称为SSR的独立会话路由器或集成会话路由器)配置为从服从OMASUPL V1规范的任何SUPL服务器接受WAP Push。接收到SUPLINIT消息时,SSR根据包括在SLP会话ID中的信息来创建唯一会话,并且,将PAP消息转送到指定的Push代理网关,例如在WAP网关内。优选地,还将从PPG接收到的确认消息返回到原始SUPL服务器。
任何SSR可以经由公共IP子网而从SET接收相应的SUPL POSINIT消息。随着管理与SET的连接和数据安全性,SSR确定起始SUPL服务器,并将SUPL POS INIT转送到该服务器。然后,在SET与SUPL服务器之间建立IP隧道,直到从SUPL服务器发送SUPLEND消息,在该点处,SSR可以断开两个实体之间的IP连接,只要不存在与SET的正在进行的会话。
因此,网络发起的(NI)呼叫流程从由SLP经由PPG或SMSC/MC而发送到SET的SUPL INIT消息开始。此消息只具有SLP会话ID,因为SET提供(填充)(populate)SET会话ID。SSR拦截来自SLP的SUPL INIT消息以便在路由信息表中创建新的会话记录。
当SET用SUPL POS INIT消息对SUPL INIT作出响应时,请求最初到达SSR。SSR执行SSR会话ID的查找以检索用于会话的路由信息。然后,用SET会话ID来更新记录并将其发送到无线运营商网络中的正确SUPL服务器实例。
SET发起的呼叫流程
规定无线运营商经由GGSN而终止到服务SSR的SET发起的(SI)定位请求的SUPL连接请求。一旦SET建立与SSR的TLS连接,SSR确定SUPL服务器的实例并创建会话的路由记录。然后,SSR连接到SUPL服务器并将SUPL消息转送到服务的SUPL服务器。
SET发起的SUPL定位请求可以通过同一TLS连接来发送多个请求。如果服务的SUPL服务器正在处理许多请求,则SSR可以智能地将同一连接内的任何新定位请求路由到SUPL服务器的另一实例。这意味着对于来自SET的一个TLS连接,可以有到处理每个定位请求的SUPL服务器的多个实例的多重TCP/IP连接。会话路由记录中的各个连接标识符关联SET与SUPL服务器之间的连接。
SSR未发现的路由记录
如果SSR不能检索特定会话的路由记录,则其与SET断开连接。这可能起因于会话超时或所有者SSR的丢失。
SUPL会话ID
对于将指定并管理用于网络发起的请求的唯一会话的会话路由器,需要有唯一的会话标识符。OMA SUPL V1标准规定SLP会话ID必须是全球唯一的,以符合会话ID唯一性的SUPL规范。这需要会话ID字段(SLP会话ID的一部分)对于特定SLP来说是唯一的,且SLP ID必须是跨越SLP而唯一的。如果SUPL服务器不服从这部分OMA SUPL V1标准,则可以实现伪唯一性方法。例如,可以使用唯一会话ID+SET ID来另外地满足规定SLP会话ID唯一性的OMASUPL V1标准。
优选地,会话路由器(SSR)支持FQDN或IP地址。可以使用决定特定主机或SLP的FQDN。决定多个SLP的全球唯一FQDN将不满足SUPL会话ID唯一性要求。然而,可以支持NAT到VIP的映射。
到会话路由器(SSR)的连接
优选地,SSR终止SET-SSR连接。SSR优选地提供有SET内规定的服务器根证书。另外,SSR优选地被配置为建立到SUPL服务器的TLS会话以保证端到端安全。
图8图解依照本发明原理的会话路由器(SSR)的示例性安全设置。
呼叫流程
图1和2公开了两个基本呼叫流程,其图解相对于选项1所描述的本发明解决方案与现有SUPL呼叫流程和架构相互作用。
图1示出依照本发明的原理的代理模式下的网络发起(基于SET或SET辅助)的非漫游成功呼叫流程。
在图1的步骤1中,SUPL代理(LCS客户端)向SUPL服务器发送MPL SLIR消息请求SET的位置。
在步骤2中,SUPL服务器确定其需要发起与SET的定位会话,并经由PPG或SMSC来发送触发消息以便将SUPL定位请求通知给SET。
在步骤3中,SSR拦截来自SUPL服务器实例的PAP消息,并在其路由表中创建会话记录。SSR创建新的SLP会话ID并在出局SUPL INIT消息中用此新值替换原始SLP会话ID。
在步骤4中,SSR经由运营商网络中的外部实体(PPG/SMSC/MC)来发送触发消息,并从外部实体(PPG/SMSC/MC)向SUPL服务器实例返回响应。这里可以启动会话定时器。
在步骤5中,SET在建立与SSR的TLS连接之后向SSR发送SUPL POS INIT消息。
在步骤6中,SSR解析入局ULP消息,并就服务的SUPL服务器地址而查询路由表。
在步骤7中,在成功地检索路由信息时,SSR建立与SUPL服务器的TCP/IP连接(安全或非安全)。其用来自会话路由记录的原始值替换SLP会话ID,并向SUPL服务器发送ULP SUPL POS INIT消息。假设由于SSR存在于运营商网络内,所以其可以与SUPL服务器直接通信。
在步骤8中,服务的SUPL服务器和SET交换带有支持的定位协议(RRLP/RRC/IS-801)有效负荷的多个SUPL POS消息,直到定位会话完成。这些ULP消息通过SSR,SSR替换SLP会话标识符并用每次交易的会话状态更新会话记录。
在步骤9中,在成功的定位会话结束时,服务的SUPL服务器通过先前建立的TCP/IP连接而向SSR发送SUPL END消息。
在步骤10中,服务的SUPL服务器将在MLP SLIA消息内的SET的位置返回到外部SUPL代理(LCS客户端)。
在步骤11中,接收到来自SUPL服务器的SUPL END消息时,SSR用会话状态来更新会话记录,并用存储在会话路由记录中的SSR生成的会话标识符来替换SLP会话标识符。
在步骤12中,SSR通过在步骤5中建立的TLS连接向SET发送SUPL END消息。
在步骤13中,SET在接收到SUPL END消息时断开与SSR的TLC连接,这促使SSR删除其自己的会话记录。然后,如果SSR未被配置为使用长期TCP/IP连接,则其终止与服务的SUPL服务器的连接。
图2示出其它基本呼叫流程,其图解选项1的本发明解决方案如何与现有SUPL呼叫流程和架构相互作用。特别地,图1示出依照本发明原理的代理模式下的SET发起(基于移动站或移动站辅助的呼叫流程)的非漫游成功呼叫流程。
在步骤1中,SUPL代理(SET中的应用程序)使用应用程序API来发起定位请求。
在步骤2中,SET建立与SSR的TLS连接,并向SSR发送SUPLSTART消息。
在步骤3中,SSR解析入局ULP消息。由于其为SUPL START消息,所以创建新的会话记录,且使用适当的负载均衡算法来识别服务的SUPL服务器。此会话记录优选地不用于路由的目的,而是简单地识别每个SLC实例上的加载。
在步骤3中,成功地确定服务的SUPL服务器时,SSR建立与SUPL服务器的TCP/IP连接(安全或非安全)。假设由于SSR存在于运营商网络内,所以其直接与SUPL服务器实例通信。
在步骤5中,服务的SUPL服务器向SSR发送SUPL RESPONSE消息。
在步骤6中,SSR通过先前建立的TLS连接向相应的SET发送SUPL RESPONSE消息。
在步骤7中,SET向SSR返回SUPL POS INIT消息。
在步骤8,SSR通过先前建立的TCP/IP连接而将SUPL POSINIT消息转送到服务的SUPL服务器。
在步骤9中,服务的SUPL服务器和SET交换带有所支持的定位协议(RRLP/RRC/IS-801)有效负荷的多个SUPL POS消息,直到定位会话完成。
在步骤10中,在成功的定位会话结束时,服务的SUPL服务器通过先前建立的TCP/IP连接而向SSR发送SUPL END消息。
在步骤11中,接收到来自SUPL服务器的SUPL END消息时,SSR从会话路由表中删除会话记录。
在步骤12中,SSR通过先前建立的TLS连接而向SET发送SUPLEND消息。SET在接收到SUPL END消息时断开与SSR的TLS连接。这促使SSR终止与服务的SUPL服务器的TCP/IP连接。
选项2-嵌入式会话管理器路由
图3示出依照本发明的原理的嵌入式会话管理,该嵌入式会话管理示出用于网络发起的非漫游代理模式、成功情况的从发起SLC路由到服务SLC的会话。
特别地,如图3所示,作为外部组件协调网络组件之间的消息的替代,在本解决方案中,在SLP内执行路由机制。虽然图3所示的呼叫流程描述了成功情况下的消息发送,但相同的路由机制同样适用于错误情况。
在图3的步骤1中,发起SLC通过用发起SLC的IP地址填充SLP会话标识符来向SET发送SUPL INIT触发消息。
在步骤2中,SET填充会话标识符的SET会话标识符部分,建立与服务的SUPL服务器(安全或非安全)的TCP/IP连接并发送SUPL POS INIT消息。
在步骤3中,服务SLC响应于SUPL INIT触发消息而接收SUPLPOS INIT消息。嵌入式会话路由器提取SLP会话ID以便将消息直接路由到发起SLC。然而,为了减少SLP的分布式地理上不同部署中的网路等待时间,定义SLC间传输请求消息,其允许服务SLC请求将从发起SLC传输到服务SLC的所有会话信息。
在步骤4中,响应于传输请求,发起SLC将正在进行的会话的所有权转让给服务SLC并用会话信息对服务SLC进行响应。这完成会话路由过程。
在步骤5中,必要时,SET和SLC完成定位会话(请注意,图5中未示出SPC)
在步骤6中,当在步骤5中从SET接收到SUPL END消息时,或者当从服务SLC发送SUPL END消息时,SUPL会话完成。
选项3-使用扩展协议中的完整URL的独立会话路由器
图4示出依照本发明原理的具有扩展协议中的完整统一资源定位符(URL)的独立会话路由器。
图4是选项1的变体。如图4所示,在本解决方案中用完整URL来扩展SLP地址以识别网络发起请求的发起SLP。完整URL的查询字符串包含识别实际发起SLP的唯一密钥。
在步骤1中,发起SLP通过用SSR的地址及其唯一密钥填充SLP地址来向SET发送SUPL INIT触发消息。
在步骤2中,SET填充会话标识符的SET会话标识符部分,建立与SSR的TCP/IP连接(安全或非安全)并用SUPL POS INIT响应向触发消息返回响应。
在步骤3中,SSR接收来自SET的入局SUPL POS INIT消息,提取SLP地址并执行查表以解析发起SLP的地址。然后,将SUPLPOS INIT消息直接发送到发起SLP。
在步骤4中,必要时,SET和SLP发起定位会话。
在步骤5中,当在步骤5中从SET接收到SUPL END消息时,或者当从服务SLP发送SUPL END时,SUPL会话完成。
在步骤6中,SSR将SUPL END消息转送到SET。
选项4-扩展协议中的嵌入式会话相关密钥
图5示出依照本发明原理的嵌入式会话管理,该嵌入式会话管理示出使用相关密钥的会话路由。
特别地,在图5所示的实施方案中用相关密钥来扩展SLP会话ID以保持用于网络发起请求的发起SLC的识别信息。
在图5的步骤1中,发起SLC通过填充SLP会话标识符的相关密钥来向SET发送SUPL INIT触发消息。
在步骤2中,SET填充会话标识符的SET会话标识符部分,建立与服务SLC的TCP/IP连接(安全或非安全)并用SUPL POS INIT响应向触发消息返回响应。
在步骤3中,服务SLC响应于SUPL INIT触发消息而接收SUPLPOS INIT消息。嵌入式会话路由器提取SLP会话ID并能够使用相关密钥将消息路由到发起SLC。然而,为了减少SLP的分布式地理上不同部署中的网路等待时间,定义SLC间传输请求消息,其允许服务SLC请求将从发起SLC传输到服务SLC的所有会话信息。然后,服务SLC处理用于交易的所有后续消息。
在步骤4中,响应于传输请求,发起SLC将正在进行的会话的所有权转让给服务SLC并用会话信息对服务SLC进行响应。这完成会话路由过程。
在步骤5中,必要时,SET和SLC完成定位会话(请注意,图5中未示出SPC)
在步骤6中,当在步骤5中从SET接收到SUPL END时,或者当从服务SLC发送SUPL END时,SUPL会话完成。
选项5-使用扩展协议中的相关密钥的独立会话路由器
图6示出依照本发明原理的独立会话路由器,该独立会话路由器示出从发起SLP到服务SLP的会话路由。
特别地,在图6所示的实施方案中用相关密钥来扩展SLP会话ID以保持用于网络发起请求的发起SLP的识别信息。
在图6的步骤1中,发起SLP通过在SLP会话ID中填充相关密钥来向SET发送SUPL INIT触发消息。
在步骤2中,SET填充会话标识符的SET会话标识符部分,建立与SSR的TCP/IP连接并用SUPL POS INIT响应向触发消息返回响应。
在步骤3中,SSR接收来自SET的入局SUPL POS INIT消息,提取相关密钥,并执行查表以解析发起SLP的地址。然后,将SUPLPOS INIT消息直接发送到发起SLP。
在步骤4中,必要时,SET和SLP发起定位会话。
在步骤5中,当在步骤4中从SET接收到SUPL END消息时,或者当从服务SLP发送SUPL END时,SUPL会话完成。
在步骤6中,SSR将SUPL END消息转送到SET。
选项6-具有扩展协议中的附加相关密钥的独立会话路由器
图7示出依照本发明原理的独立会话路由器,该独立会话路由器示出从发起SLP到服务SLP的会话路由器。
特别地,如图7所示,通过附加相关密钥来扩展SLP会话ID以保持发起SLP的识别信息。
在图7的步骤1中,发起SLP通过填充SLP会话标识符来向SSR发送SUPL INIT触发消息。
在步骤2中,SSR接收来自发起SLP的出局SUPL INIT触发消息并用唯一相关密钥来更新SLP会话ID。然后,其将SUPL INIT消息转送到SET。
在步骤3中,SET填充会话标识符的SET会话标识符部分,建立与SSR的TCP/IP连接并用SUPL POS INIT响应向触发消息返回响应。
在步骤4中,SSR接收来自SET的入局SUPL POS INIT消息,提取相关密钥,并执行查表以解析发起SLP的地址。然后,在不修改原始SLP会话ID的情况下,将SUPL POS INIT消息直接发送到发起SLP。
在步骤5中,必要时,SET和SLP发起定位会话。
在步骤6中,当在步骤4中从SET接收到SUPL END消息时,或者当从服务SLP发送SUPL END消息时,SUPL会话完成。
在步骤7中,SSR将SUPL END消息转送到SET。
本发明的益处包括这样的事实,即,如选项2、3和4所体现的本发明通过使用智能传输方案将请求从发起SLC传输到服务SLC来减少服务SLC跨越WAN连接时的情况下的网络等待时间。当服务SLC距离发起SLC很远时,仅执行传输请求。此外,如选项1、5和6所体现的本发明通过以兼容的方式处理完全不同的系统的TLS证书管理和实施的所有方面来为系统提供稳定的安全保护。
虽然已参照本发明的特定实施方案描述了本发明,但本领域的技术人员将能在不脱离本发明的真实精神和范围的情况下对所描述的本发明实施方案进行各种修改。
Claims (15)
1.一种位置会话管理器,包括:
安全用户平面定位SUPL会话路由器;以及
会话记录管理器,在从网络SUPL代理接收到对移动设备的SUPL定位请求时创建SUPL会话记录,在接收到关于所述SUPL会话的后续SUPL定位请求消息发送时检索所述SUPL会话记录,并在相应的SUPL会话完成时删除所述SUPL会话记录,所述SUPL会话记录提供路由信息以将所述后续SUPL定位请求消息发送路由到多个SUPL服务器中选定的一个SUPL服务器。
2.如权利要求1所述的位置会话管理器,其中:
所述SUPL会话路由器是与发起SUPL代理分开的独立会话路由器。
3.如权利要求1所述的位置会话管理器,其中:
所述SUPL会话路由器被嵌入在发起SUPL代理内。
4.如权利要求1所述的位置会话管理器,其中:
出于路由的目的,所述SUPL会话路由器将用于悬而未决的和正在进行的SUPL定位会话的会话信息存储在内部表中。
5.如权利要求4所述的位置会话管理器,其中:
所述会话信息的所述存储用于路由和负载均衡两个目的。
6.一种在包括多个安全用户平面定位SUPL服务器的网络中管理网络发起的SUPL定位请求的方法,包括:
在SUPL会话路由器中捕获关于SUPL会话的网络发起的SUPL定位请求;
通过所述SUPL会话路由器,在移动设备和所述多个SUPL服务器中被指定为处理所述SUPL定位请求的选定的一个SUPL服务器之间传递关于所述SUPL会话的后续SUPL定位请求消息发送;以及
根据存储在SUPL会话记录中的路由信息,将所述后续SUPL定位请求消息发送路由到所述多个SUPL服务器中处理所述SUPL定位请求的所述选定的一个SUPL服务器。
7.如权利要求6所述的在包括多个SUPL服务器的网络中管理网络发起的SUPL定位请求的方法,其中:
所述SUPL会话路由器是与发起SUPL代理分开的独立会话路由器。
8.如权利要求6所述的在包括多个SUPL服务器的网络中管理网络发起的SUPL定位请求的方法,其中:
所述SUPL会话路由器被嵌入在发起SUPL代理内。
9.如权利要求6所述的在包括多个SUPL服务器的网络中管理网络发起的SUPL定位请求的方法,还包括:
出于路由的目的,将用于悬而未决的和正在进行的SUPL定位会话的会话信息存储在内部表中。
10.如权利要求9所述的在包括多个SUPL服务器的网络中管理网络发起的SUPL定位请求的方法,其中:
所述会话信息的所述存储用于路由和负载均衡两个目的。
11.一种用于在包括多个安全用户平面定位SUPL服务器的网络中管理网络发起的SUPL定位请求的设备,包括:
用于在SUPL会话路由器中捕获关于SUPL会话的网络发起的SUPL定位请求的装置;
用于通过所述SUPL会话路由器在移动设备和所述多个SUPL服务器中被指定为处理所述SUPL定位请求的选定的一个SUPL服务器之间传递关于所述SUPL会话的后续SUPL定位请求消息发送的装置;以及
用于根据存储在SUPL会话记录中的路由信息,将所述后续SUPL定位请求消息发送路由到所述多个SUPL服务器中处理所述SUPL定位请求的所述选定的一个SUPL服务器的装置。
12.如权利要求11所述的用于在包括多个SUPL服务器的网络中管理网络发起的SUPL定位请求的设备,其中:
所述SUPL会话路由器是与发起SUPL代理分开的独立会话路由器。
13.如权利要求11所述的用于在包括多个SUPL服务器的网络中管理网络发起的SUPL定位请求的设备,其中:
所述SUPL会话路由器被嵌入在发起SUPL代理内。
14.如权利要求11所述的用于在包括多个SUPL服务器的网络中管理网络发起的SUPL定位请求的设备,还包括:
用于出于路由的目的而将用于悬而未决的和正在进行的SUPL定位会话的会话信息存储在内部表中的装置。
15.如权利要求14所述的用于在包括多个SUPL服务器的网络中管理网络发起的SUPL定位请求的设备,其中:
所述会话信息的所述存储是用于路由和负载均衡两个目的的。
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JP2010509889A (ja) | 2010-03-25 |
JP5123311B2 (ja) | 2013-01-23 |
AU2007322150B2 (en) | 2011-06-09 |
US20110258328A1 (en) | 2011-10-20 |
AU2007322150A1 (en) | 2008-05-29 |
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