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LC-MAC:一种针对长链拓扑的无线传感器网络MAC协议

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摘要 在无线传感器网络的实际应用中,传感器节点常用于监测一条直线上的物体,如电力电缆监测系统、水道监测系统等。在长链拓扑下,随着中继节点越来越靠近接收节点,多跳传输的负载和延迟将会不断增大,导致剧烈的碰撞和冲突,从而影响接收节点处测量数据的准确性,甚至导致整个网络的崩溃。该文提出了一种带占空比机制的MAC协议,称为LC-MAC(the Long-ChainMAC)协议,在LC-MAC协议下,超级同步帧(super SYNC,SSYNC)为后面的数据传输进行预约;预约完成后,各中继节点都在预约时间醒来,接收上游节点的数据包,并且立即转发给下游节点。NS-2的仿真实验结果表明,相比于SMAC协议,LC-MAC协议在保证能耗和吞吐率性能的情况下,极大地降低了长链拓扑的端到端延迟。
机构地区 东南大学
出处 《电脑知识与技术》 2012年第5期3030-3034,共5页 Computer Knowledge and Technology
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参考文献11

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