一种新的无线传感网局域按需簇维护算法

针对无线传感器网络中时间驱动和整网簇头轮换导致不必要的能量消耗问题,提出并建立了基于能量驱动和区域簇头轮换的簇维护算法.算法包括动态能量阈值的计算和动态TDMA时隙调度的方案,实现非周期性、局域范围内的簇头轮换和对簇的及时维护.在NS2中得到的仿真结果表明,与低功耗自适应集簇分层型(lowenergy adaptive clustering hierarchy,LEACH)协议相比,该算法延长了网络生存时间,增加了传输的数据包总量.

Novel algorithm of local and on-demand cluster(s) maintaining for wireless sensor networks

Time driving and cluster head turning will result in an unnecessary consumption of energy in wireless sensor networks. In this paper, a maintaining cluster(s) algorithm based on energy driving and local-area re-election of cluster head(s) is presented to solve the problem. The calculation of dynamic energy threshold value and the schedule of dynamic TDMA time slot are included in the algorithm. Non-periodic and local cluster head turning and timely maintaining of the changed cluster(s) are realized in the algorithm. The simulation results in the NS2 show that the proposed method can prolong lifetime of the whole network and increase transmitted data compared with the LEACH protocol.