作　　者： ; ; ;

机构地区： 华南农业大学

出　　处： 《软件》 2011年第2期49-52,共4页

摘　　要： 无线传感器网络(WSN)使用灵活,移动性强,架设便捷,应用范围非常广泛。媒体访问控制(MAC)协议是保证无线传感器网络高效通信的关键网络协议之一。重点分析了WSN中基于竞争的典型MAC协议——S-MAC协议。针对S-MAC协议中采用的退避算法不能良好地解决节点通信公平性等问题,提出了BDQR退避算法。实验结果表明,该算法有效地提高了节点通信公平性,降低了信道的碰撞,延长了网络的生命周期。 Nowadays Wireless Sensor Networking（WSN） has been widely used because of its adaptivity,mobility and scalability.The MAC protocol is one of the most important network protocol which guarantees the WSN communication efficiency.The major concern of this paper is the typical contention-based MAC protocol in WSN—the S-MAC protocol.Considering the backoff algorithm of S-MAC protocol cannot resolve the fairness problem for nodes communication,the BDQR （Backoff Depends on Queue and Retry） backoff algorithm was presented in this paper.The simulation results demonstrated that by using this algorithm,the nodes can escape crowded contention window promptly when transmission is failed,The optimal transmission of Windows could be kept as well aslocating and solving the network congestion regional issues after a successful delivery.By using this protocol,node communication fairness was improved,channel collisions were reduced while network lifespan was prolonged.

关 键 词： 无线传感器网络 媒体访问控制 退避算法

领　　域： [自动化与计算机技术] [自动化与计算机技术]