Ad Hoc网络中公平与效率兼顾的信道接入退避算法
首发时间:2009-03-12
摘要:Ad Hoc网络中的媒体接入控制协议的性能是决定节点能否高效、公平地共享有限带宽资源的主要因素。基于网络局部通信状况估计思想,提出了一种节点信道竞争公平性与网络传输效率兼顾的退避算法,并利用全网所有链路信道竞争公平性指数计算方法对节点信道竞争公平性进行评价。分析与仿真实验结果表明,与IEEE 802.11标准的BEB算法和其它算法相比,该算法不仅简单,而且在保证网络高吞吐量的基础上,节点信道竞争的公平性大大提高。
关键词: Ad Hoc网络 退避算法 公平性指数 MAC协议
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A Fair and Efficient Channel Access Backoff Algorithm in Ad Hoc
Abstract:The performance of media access control protocol in Ad Hoc network is the major factor to determine whether the nodes can efficiently and fairly share the limited channel resource or not. Basing on communication status estimating idea of local area network, it puts forward a fair and efficient backoff algorithm in nodes channel competition and evaluates the fairness of node channel competition by calculating the fairness index for channel competition of all network links. The analysis and the result of stimulation experiment show that comparing with the standard BEB algorithm in IEEE 802.11 and other algorithms, the algorithm is not only simple, but also has an excellent performance in fairness of node channel competition under the circumstances of a high throughput of the network.
Keywords: Ad Hoc network backoff algorithm fairness index MAC protocol
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