A Bandwidth Aware Multi-path Routing Protocol in Mobile Ad Hoc Networks
A Bandwidth Aware Multi-path Routing Protocol in Mobile Ad Hoc Networks
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发表时间：
2011
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通讯作者：
Wenjing Yang;Xinyu Yang;Guozheng Liu;C. Dong
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作者：
Wenjing Yang;Xinyu Yang;Guozheng Liu;C. Dong
随着多媒体的普及，移动的Ad Hoc网络（MANNETWORK）对大业务流的需求越来越大。然而，无线网络有限的带宽已经成为制约多媒体应用发展的主要因素。多路径路由通过源和目的地之间的多条路径并行传输，提高了端到端的吞吐量，从而满足了多媒体应用的带宽需求。研究了无干扰并行路径数与端到端吞吐量的关系，得出当并行路径数为2时，路由性能最优。在此基础上，提出了一种带宽感知的多路径路由协议（BMR），该协议根据可用带宽的限制，在源节点和目的节点之间找到两条不相交的并行路径。在BMR中，节点的可用带宽是基于跨层机制获得的，它可以为路由发现提供度量。仿真结果表明，BMR在提高端到端吞吐量、分组投递率和端到端延迟方面表现良好。因此，它比现有的协议更适合于多媒体业务。
With the popularity of multimedia, there is a growing tendency in the demand of high traffic flows in mobile Ad Hoc networks (MANETs). However, the limited bandwidth of wireless network has become the principal factor that restrains the development of multimedia applications. Multi-path routing improves end-to-end throughput through parallel transmission with multiple paths between source and destination, thus satisfying the bandwidth requirement of multimedia applications. This paper studies the relationship between the number of non-interference parallel paths and the end-to-end throughput, and then concludes that routing can achieve the optimal performance when the number of parallel paths is 2. Based on the analysis, this paper presents a Bandwidth aware Multi-path Routing (BMR) protocol, which can find two disjoint parallel paths between source and destination based on the available bandwidth restriction. In BMR, the available bandwidth of node is obtained based on a cross-layer mechanism, which can provide a metric for routing discovery. Simulation results show that BMR performs well in improving end-to-end throughput, packet delivery ratio, and end-to-end delay. Therefore, it is more suitable for multimedia traffic than existing protocols.