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Documents 无线Mesh网络多信道MAC协议的研究
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  • Author Author: sophie0love
  • Date Created: 15 Nov 2010 8:10 AM Date Created
  • Last Updated Last Updated: 9 Nov 2021 4:48 PM
  • Views 466 views
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无线Mesh网络多信道MAC协议的研究

无线Mesh网络是与传统无线网络完全不同的新型无线网络技术,是一种由 mesh routers(路由器)和mesh clients(客户端)组成的多跳网络。目前,无线 Mesh网络的研究在全世界十分活跃。由于信道资源的分配与管理对无线Mesh 网络的性能优化起着重要的作用,因此,无线Mesh网络的MAC协议也成为了研究的热点。 本文通过对无线Mesh网络的概念、结构,以及无线Mesh网络MAC协议国内外研究现状的分析,将多信道MAC协议作为研究的重点。论文从现有的 MAC协议入手,介绍了多信道无线Mesh网络的需求以及面临的问题,分析了几种常用的多信道MAC协议。在此基础上,本文重点分析了一种基于双接口的多信道无线Mesh网络,提出了混合多信道协议HMCP。在基于该协议的无线 Mesh网络中,每个节点有两个接口,并且可在多个信道上传输。该协议提出了一种信道分配策略,这种策略在一定程度上增大了网络吞吐量,提高了系统性能。该信道分配策略支持在可换接口上频繁的切换信道,但同时带来了一定的信道切换开销,这也是导致无线Mesh网络性能下降的关键因素之一。针对这个问题,本文就如何降低信道切换延时及其对系统各方面性能的影响进行了分析和讨论。

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