基于剩余能量和距离信息的异构网络分簇协议

Residual energy and distance based clustering protocol for heterogeneous WSN

针对无线传感网络WSN(wireless sensor network)的网络寿命问题,提出了面向异构网络环境下的基于剩余能量和距离分簇(residual energy and distance clustering,REDC)协议。REDC协议考虑了普通节点、中级节点以及高级节点,具有较高的初始能量节点称为中级节点和高级节点,余下的称为普通节点。在簇头(cluster head,CH)选举中,考虑节点的剩余能量和离基站距离信息,使得具有较高的剩余能量节点、离基站距离较近的节点有更多的机会被选为簇头,进而避免了剩余能量较小的节点成头簇头CH而产生节点过早失效缩短网络寿命的问题,平衡了网络内的能量消耗。仿真结果表明,与LEACH、DDEEC和SEP协议相比,提出的REDC协议具有较长的网络寿命和良好的数据传输能力。

To prolong WSN lifetime,this paper proposed residual energy and distance based clustering protocol for heterogeneous WSN. The protocol considered three varieties of nodes i. e.,normal,intermediate and advanced nodes. Nodes with higher battery energy were designated as advanced and intermediate nodes,and the remaining nodes were conventional normal nodes.The CH( cluster head) was selected based on residual energy and distance between nodes and base station,so that nodes with more residual energy had more election probability in the process of cluster head election. It also avoided reducing network lifetime caused by making the nodes with less residual energy act as CH. It balanced the energy consumption of network and prolonged the network survival time. Simulation results show that the proposed RDEC protocol has a longer lifetime and more good capacity of data transmission than LEACH,DDEEC and SEP protocol.