Lifetime Optimized Algorithm with Mobile Sink Node in Wireless Sensor Networks
Yourong Chen · Chuangan jishu xuebao · 2012
To prolong the network lifetime,lifetime optimized algorithm with mobile Sink node(LOAMSN)is proposed.The constraint conditions with mobile Sink node such as flow balance constraint,maximum transmission rate constraint and node energy constraint are analyzed.Then the optimized lifetime problem is formulized into optimized model.The mobile method of Sink node is proposed.Sink node uses the degree values of nodes to construct the mobile path and moves circularly to collect date following the path.The mobility of Sink node is considered as discrete movement.Therefore,the optimized lifetime model of mobile Sink node is divided into several optimized models of static Sink node.Each optimized model of static Sink node is solved by Newton algorithm.Finally the optimal values of network maximum lifetime and node transmission data amount are obtained.Simulation results show that LOAMSN algorithm can reduce the node energy consumption in which positions the Sink node stays,and balance network load,the other nodes'energy consumption,and prolong the maximum network lifetime.Under certain conditions,LOAMSN algorithm outperforms the algorithm when Sink node is static.