混合无线传感器网络覆盖空洞修复策略

针对混合无线传感器网络中的覆盖空洞问题,提出了考虑能量的基于移动节点的无线传感器网络覆盖空洞修复策略。采用概率感知模型建立联合探测概率密度函数,通过探测概率和剩余能量评价网络状态,从而确定覆盖空洞。提出了节点虚拟移动的空洞修复方法,在得到每个空洞位置后放置一个虚拟节点直至计算结束后调整移动节点位置,节约了移动节点能量。仿真结果表明:该方法可以有效探测并利用移动节点修复覆盖空洞,消耗较小的网络能量,提高了网络覆盖率和网络生存时间。

Reparation Strategy of Coverage Holes in Hybrid Wireless Sensor Networks

According to the problem of coverage holes in hybrid wireless sensor network, reparation strategy of coverage holes based on mobile nodes is proposed with the consideration of the energy distribution. Build the joint detection probability function using probabilistic detection model, evaluate network status through joint detection probability and residual energy, and thus determine the location of coverage holes. The reparation strategy of coverage holes based on virtual mobile is put forward, place a virtual node when get the location of each hole, and adjust the location of the mobile node at the end of calculation, which save a lot energy of the mobile nodes. Simulation results show that the proposed method could detect and repair coverage holes effectively using mobile sensors, which consume a smaller energy, improve the network coverage rate and prolong the lifetime of network.