基于能量表的双簇头无线传感网MAC协议
首发时间:2012-12-04
摘要:无线传感网中节点的低能量特性对MAC协议的设计来说是个巨大的挑战,在众多不同的以分簇为基础的MAC协议中,基于位图辅助(Bit-Map-Assisted)MAC协议在非大量数据传输、数据帧长度较大的情况下,有较好的表现。针对BMA协议中簇头节点能量消耗大,容易造成单个节点死亡的问题,提出了以能量表为辅助工具,采用节点休眠和簇头选择更换策略的双簇头MAC协议。仿真结果表明,较BMA协议相比,改善了网络中节点过早衰竭的情况,延长了整个网络的生命周期。
关键词: 无线传感网 MAC协议 位图辅助 能量表 双簇头 休眠
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A MAC Protocol of Double Cluster Heads for Wireless Sensor Networks Based on Energy Table
Abstract:It is a big challenge for MAC protocol design because of the low-energy characteristics in the wireless sensor networks. In the different cluster-based MAC protocols, the intra-cluster communication bit-map-assisted (BMA) MAC protocol show a good result in the cases of non-bulk traffic loads and relatively large data packet sizes. However, the single cluster head will consume big energy and dies easily in the BMA. We take an energy table as an assistant tool, took the double cluster head MAC protocol of the policy of node sleep and double cluster selection and replacement. As showed in the simulation results compared to the BMA, the situation of node that dying early get a good improvement and extend the lifetime of the entire network.
Keywords: WSN MAC protocol BMA Energy table Double cluster heads Sleep
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