基于无线传感器网络PEGASIS算法的一种改进方案

基于对LEACH算法分簇思想的研究,对PEGASIS算法进行了改进,提出了高能效的PEGASIS(HEE-PEGAS-IS)算法;新算法将网络划分成多个等宽区域,区域内节点成链,考虑节点剩余能量和节点与基站之间的距离,使各簇链的簇首节点依次成主链,由主链首节点与基站通信;仿真结果表明:与PEGASIS算法相比,改进后的算法能有效节省网络能量,延长无线传感器网络寿命,提高了数据传输总量。

Improved Algorithm Based on PEGASIS of Wireless Sensor Networks

Based on the study of the clustering technique of LEACH, High Energy Efficient PEGASIS （HEE-PEGASIS） algorithm which is improved by PEGASIS algorithm is proposed. From the new algorithm, the network is divided into multiple equal width regions in which the nodes communicate with each other in subchain, and the subchain cluster heads go in main chain to communicate with base station by main chain cluster head which should be considered residual energy and the distance between base station and subchain cluster heads. The simulation results show that, compared with the PEGASIS, the improved algorithm can effectively save network energy, prolong the network lifetime and increase the total quantity of data transmission.