Evaluation of Wireless Mesh Network Handoff Approaches for Public Safety and Disaster Recovery Networks

R. Wishart, M. Portmann, J. Indulska
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引用次数: 13

Abstract

In public safety and disaster recovery (PSDR) scenarios, reliable communication is an imperative. Unfortunately, communication infrastructure is often destroyed or overwhelmed by whatever precipitated the scenario (e.g., a hurricane or terrorist attack). Thus, the PSDR workers must often deploy their own communications infrastructure on-site. Wireless mesh networks (WMN) have been identified as being ideally suited to this task. WMN offer a high-capacity wireless backhaul network, provided by mesh routers, through which clients can connect to one another or with external networks. Mobility of clients within the mesh is particularly important for public service and disaster recovery scenarios. This creates a challenging problem as clients may move out of range of the mesh router they were using to connect to the mesh and need to associate with another. Client handoff mechanisms provide this functionality. In this paper we provide a critical survey of client handoff approaches applicable to IEEE 802.11 WMN evaluating them based on the strict QoS requirements established by the US Department of Homeland Security for PSDR networks.
公共安全和灾难恢复网络无线Mesh网络切换方法的评估
在公共安全和灾难恢复(PSDR)场景中,可靠的通信是必不可少的。不幸的是,通信基础设施经常被任何突发事件(例如飓风或恐怖袭击)破坏或淹没。因此,PSDR工作人员必须经常在现场部署他们自己的通信基础设施。无线网状网络(WMN)已被确定为理想的适合于这项任务。WMN提供由网状路由器提供的高容量无线回程网络,通过该网络客户端可以相互连接或与外部网络连接。网格内客户端的移动性对于公共服务和灾难恢复场景尤其重要。这产生了一个具有挑战性的问题,因为客户端可能会移动到他们用来连接到网格的网状路由器的范围之外,并且需要与另一个相关联。客户端切换机制提供了这种功能。在本文中,我们提供了适用于IEEE 802.11 WMN的客户端切换方法的关键调查,根据美国国土安全部为PSDR网络建立的严格QoS要求对其进行评估。
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