基于被动触发机制的无线传感器网络簇区域更新算法

Cluster Region Update Algorithm Based on Passive Trigger Mechanism for Wireless Sensor Network

在当前无线传感器网络(WSN)分簇技术中,采用主动轮询机制进行簇区域更新需要定时进行簇头轮询,易导致簇头节点因耗能严重而失效与网络拥塞等问题。为此,基于被动触发机制提出一种新型WSN簇区域更新算法。通过控制簇区域能量阈值实现对失效簇头节点的有效探测,当且仅当簇头节点能量低于可正常工作能量时才进行节点的下一轮更新。新簇区成型后,簇头节点计算得到最佳数据传输链路,从而实现传感数据的高效上传,改善汇聚链路抖动的状况。仿真结果表明,与节点最大能量更新算法与平均最佳传输节点更新算法相比,该算法可减少数据采集与更新过程中的拥塞现象,提高WSN的带宽利用率与网络稳定运行时间,延长网络存活周期。

In view of the current Wireless Sensor Network （WSN） clustering technology, updating the cluster region based on active polling mechanism needs to update cluster head at set intervals, which is easy to cause problems like cluster head node failure due to severe energy consumption and network congestion. Aiming at these problems, a new algorithm for cluster region update in WSN is proposed based on passive trigger mechanism. Firstly, the disabled cluster head is effectively detected by controlling the cluster region energy threshold, and next update of the cluster head node is only executed when the energy of the cluster head is lower than the normal working energy. Then the best data transmission link is got after the new cluster is formed, so as to achieve efficient upload of the sensing data and improve the performance of the link. Simulation result shows that the proposed algorithm can effectively reduce the congestion in the process of data acquisition and update,improve the bandwidth utilization ratio and network stability, and extend the lifetime of the network compared with EBDGA algorithm and PEDAP algorithm.