双sink无线传感器网络能量空洞避免策略

Double-sinks Energyhole Avoidance Strategy Fordouble Sinks Sensor Networks

由于单一的sink节点覆盖区域有限,因而在大规模无线传感器网络中,多采用双sink或多sink的网络结构.针对双sink网络环境下,网络不同区域的节点能耗不均而造成的能量空洞现象,提出一种双sink能量空洞避免策略(DEAS,doublesinks energyhole avoidance strategy).其核心思想是:根据阈值训练的结果,以双sink监测区域内节点的能耗负载差异为导向,动态地调整双sink的监测区域面积,使得双sink监测区域内节点的能耗负载趋于一致,以避免负载较大区域内过早出现能量空洞现象而导致网络失效.实验结果表明,DEAS策略能有效平衡网络中各区域节点的能耗,并提高网络能量利用效率和网络寿命.

It is limited for single sink to cover the entire network, so there arealways double or multiple sinks in large-scale networks. To solve the energy-hole problem in Wireless Sensor Networks with double sinks, a novel method named double-sinks energy-hole a- voidance strategy （DEAS） is proposed. The core ideais that, DEAS changes the monitoring area dynamically based on the result of training and the load between two sinks. DEAS can prolong the network lifetime by balancing the sensor loads between two sinks, and the ＂hot-spots＂ problem can be avoided. Simulation results demonstrate that the protocol can efficientlybalance the energy dissipation of two sinks, and prolong the network lifetime.