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CN1833451A - 改进的无线网络小区控制器 - Google Patents

改进的无线网络小区控制器 Download PDF

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Publication number
CN1833451A
CN1833451A CNA2004800146741A CN200480014674A CN1833451A CN 1833451 A CN1833451 A CN 1833451A CN A2004800146741 A CNA2004800146741 A CN A2004800146741A CN 200480014674 A CN200480014674 A CN 200480014674A CN 1833451 A CN1833451 A CN 1833451A
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cell site
site controller
port
function
mobile unit
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弗兰克·詹姆斯
约翰·克莱恩
罗伯特·彼切
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Symbol Technologies LLC
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Symbol Technologies LLC
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • 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]

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

Abstract

局域网带有小区控制器(48)，所述小区控制器与RF端口(50－58)一起操作，并提供接入点的高级MAC功能。此外，所述小区控制器替代通常在所述局域网内使用的路由器，以提供第3层路由和过滤功能。

Description

改进的无线网络小区控制器
背景技术
本发明涉及用于无线网络，尤其是将IEEE标准802.11协议用于计算机或有线网与移动单元之间的无线通信的无线网络的改进小区控制器。
在2000年3月17日申请的同时转让的待审美国专利申请号09/528,697中，描述了一种用于执行无线数据通信的改进设置，在这里全部引入作为参考，其中以简化RF端口代替接入点，而在小区控制器内执行所述接入点的某些高级媒体接入控制(MAC)功能，例如关联和漫游功能，所述小区控制器优选的是板级个人电脑。
本发明的目的是提供一种执行局域网的附加功能的改进小区控制器。
发明内容
根据本发明，数据通信系统得到改进，其中RF端口用于与移动单元通信(例如中继信号和消息)，至少一个小区控制器用于在有线网与RF端口之间中继数据通信分组，而所述小区控制器被设置为，为所述RF端口执行关联和漫游功能，例如在所述RF端口与所述小区控制器之间发送和接收关联信号。根据所述改进，所述小区控制器还被设置为执行网络控制功能(例如通用七层开放系统互连(OSI)参考模型的第3层连网功能)。第3层功能可能包括过滤寻址、路由、分组形成、互联网协议(IP)和服务质量(QoS)功能。
在一种设置中，所述小区控制器为所述有线网络执行IP路由功能。作为附加或作为选择，所述小区控制器被设置成为数据分组执行QoS功能。
为了更好理解本发明及其他和更深层目的，结合附图来参照具体实施方式，并在所附权利要求书内指出本发明范围。
附图说明
图1是说明包括用于根据现有技术与移动单元无线数据通信的设置的局域网的框图。
图2是说明包括用于根据本发明原理无线数据通信的设置的局域网的框图。
具体实施方式
参照图1，其示出了局域网10的实例，所述局域网10包括用于根据现有技术与移动单元无线数据通信的设置。网络10包括路由器12，所述路由器12根据互联网地址和消息的其它特征引导有线网络内的消息。包括交换消息在内的路由器12所执行的功能被称作第3层功能。除此之外，路由器12所执行的功能为包括消息业务优先化的网络管理。一般而言，分组消息包括识别所述消息目的地的IP地址字段。所述路由器使用此字段内的数据，以将所述分组发送到对应目的地，所述目的地可能是用于继续经由无线媒体中继的接入点、诸如服务器14或16的服务器或广域网接口18。除此之外，路由器12所执行的功能为过滤功能，包括被称作服务质量(QoS)功能的消息优先化，例如给予指向或来自与诸如安全的紧急功能相关的目的地的消息分组优先级。此外，可能还会给予话音经由IP(VoIP)优先级，以在所述目的地处提供持续话音业务。路由器12还可具有涉及需要加密以及经由加密链路的传输的消息的功能。此外，路由器12还具有的功能为将分组指向与共享局域网的虚拟网相关的入口。例如在图1内示出的系统10包括具有常规接入点20A、22A和24A的第一网络分支A。第二分支B包括接入点20B、22B和24B。还示出了在所参考的未决申请内描述的一种设置，所述设置包括连接到第三分支C并具有RF端口32C和34C的小区控制器25。所述接入点和RF端口与相关移动单元26、28和30通信。在此设置中，所述小区控制器与RF端口的组合提供了所述接入点交替提供的功能。
参照图2，其示出了根据本发明改进的示范实施例，其中小区控制器48被设置成除了为连接到其的RF端口提供高级MAC功能之外，还执行通常由路由器12、交换集线器或桥接交换器提供的与局域网第3层过滤和交换相关的功能。图2的设置包括两个服务器14、16以及图1系统10的WAN接口18，它们直接连接到小区控制器48的端口。此外，如在所参考的待审申请内所描述，小区控制器48借助以太网电缆直接连接到与移动单元42、44通信的RF端口50、52、54、56、58。因此，小区控制器48被配置为提供通常由图1配置中的路由器2所提供的IP路由、优先权和QoS、交换和分组功能，并提供通常由图1系统的接入点或小区控制器25所执行的高级MAC功能。此外，所述小区控制器48可使用移动单元的识别(例如扩展服务集识别符(ESSID))，以路由分组并指定其优先级。此外，小区控制器48还可分析网络业务量，并执行对于指向和来自RF端口的网络业务量的管理。例如，如果特定RF端口涉及到移动单元的数量超限或不均衡(如大量用户一起开会)，则控制RF端口的相关和漫游功能的小区控制器48便会操作，以将移动单元重新指定给其他轻负荷RF端口。由于所述小区控制器对于RF端口的操作具有直接控制，因此与图1系统的路由器12相比，所述小区控制器更适宜执行所述资产和业务量管理功能。
图2的系统设置排除了与图1系统10的路由器12相关的附加硬件，并能更有效控制网络业务量。系统管理员可借助其ESSID规定分配给各个用户的系统带宽量，使用图2的小区控制器48来管理所述分配，并基于每个分组内的ESSID识别给予分组优先或非优先处理。
本领域技术人员应当理解的是，图2的系统还可以扩充成包括一个或多个附加小区控制器和相关RF端口。在这种情况下，必须在所有小区控制器内都建立关于网络管理的任务和规则并使其相互协调，以提供有效的网络管理。
尽管以上描述了本发明的优选实施例，但本领域技术人员应当理解的是，在并不背离本发明精神的情况下可执行其他和进一步的改变和修改，而对于所有属于本发明实质范围内的改变和修改进行权利要求。

Claims (20)

1、在无线数据通信系统中，RF端口用于与移动单元通信，至少一个小区控制器用于在有线网与所述RF端口之间中继数据通信分组，所述小区控制器被设置成为所述RF端口执行关联和漫游功能，其改进在于，所述小区控制器还被设置为执行第3层网络控制功能。
2、根据权利要求1中的改进，其中所述第3层网络控制功能包括过滤和交换功能。
3、根据权利要求1中的改进，其中所述小区控制器被设置为执行路由功能。
4、根据权利要求1中的改进，其中所述小区控制器被设置为执行服务质量功能。
5、根据权利要求1中的改进，其中所述小区控制器被设置为执行分组形成功能。
6、根据权利要求1中的改进，其中所述小区控制器被设置为执行寻址功能。
7、在无线数据通信系统中，RF端口用于与移动单元通信，至少一个小区控制器用于在有线网与所述RF端口之间中继数据通信分组，所述小区控制器被设置成为所述RF端口执行关联和漫游功能，其改进在于，所述小区控制器还被设置为执行路由器的功能。
8、根据权利要求7中的改进，其中所述小区控制器被设置为执行路由器的资产和业务量管理功能。
9、根据权利要求7中的改进，其中所述小区控制器被设置为控制移动单元对于所述RF端口的指配。
10、根据权利要求7中的改进，其中所述小区控制器被设置为基于移动单元标识来管理带宽分配。
11、一种用于操作无线局域网的方法，所述无线局域网具有至少一个RF端口、多个移动单元以及耦合到所述RF端口的小区控制器，所述方法包括：
操作所述RF端口，将从移动单元接收到的信号中继到所述小区控制器，并且将从所述小区控制器接收到的信号中继到所述移动单元；
操作所述小区控制器，控制所述移动单元与所述RF端口的关联，所述关联包括在所述RF端口与所述小区控制器之间发送和接收关联信号；
操作所述小区控制器，经由所述RF端口将消息发送到所述移动设备，或从所述移动单元发送消息；
操作所述小区控制器，以执行网络控制功能。
12、根据权利要求11的方法，其中所述网络控制功能是第3层网络控制功能。
13、根据权利要求12的方法，其中所述第3层网络控制功能是路由功能。
14、根据权利要求12的方法，其中所述第3层网络控制功能是服务质量功能。
15、根据权利要求12的方法，其中所述第3层网络控制功能是分组形成功能。
16、根据权利要求12的方法，其中所述第3层网络控制功能是过滤功能。
17、根据权利要求12的方法，其中所述第3层网络控制功能是寻址功能。
18、一种用于操作无线局域网的方法，所述无线局域网带有RF端口和至少一个小区控制器，所述RF端口用于与移动单元通信，所述至少一个小区控制器用于在有线网与所述RF端口之间中继数据通信分组，其中所述小区控制器被设置成为所述RF端口执行关联和漫游功能，所述方法包括使用所述小区控制器来执行路由器的网络功能。
19.一种用于操作无线局域网的方法，所述无线局域网带有RF端口和至少一个小区控制器，所述RF端口用于与移动单元通信，所述至少一个小区控制器用于在有线网与所述RF端口之间中继数据通信分组，其中所述小区控制器被设置成为所述RF端口执行关联和漫游功能，所述方法包括使用所述小区控制器来控制移动单元对于所述RF端口的指配。
20、一种用于操作无线局域网的方法，所述无线局域网带有RF端口和至少一个小区控制器，所述RF端口用于与移动单元通信，所述至少一个小区控制器用于在有线网与所述RF端口之间中继数据通信分组，其中所述小区控制器被设置成为所述RF端口执行关联和漫游功能，所述方法包括使用所述小区控制器，以基于移动单元标识来管理带宽分配。
CNA2004800146741A 2003-05-28 2004-05-28 改进的无线网络小区控制器 Pending CN1833451A (zh)

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