异构监测传感器网络寿命最大化模型及其求解

An Optimal Lifetime Model and It′s Solution of a Heterogeneous Surveillance Sensor Network

对于有两类无线传感器节点组成的异构监测网络,给出了考虑连通覆盖约束条件的求解网络寿命的最优化模型;根据KKT条件,最优解处的不等式约束可以转化为等式约束,得到了模型的最优解,该最优解对于实时调整传感器网络的感知/发射半径具有很强的指导意义.数值结果表明,网络最大寿命值随传感器的感知/发射半径的增加而减小;同时传感器发射半径的调整,可以提高网络寿命.

In this paper, an optimal lifetime model of a heterogeneous surveillance sensor network, which consists of two types of sensor nodes, is given. The optimal lifetime model takes connectivity and coverage of the surveillance areas as part of the constraints. From the KKT theorem, the corresponding inequalities become equalities at the optimal solution. Furthermore, the optimal solution of the given model is gained, which is instructive for tuning the sense/transmission radius of the sensor network in a real-time way. Numerical result shows that the maximal lifetime of the sensor network decreases as the sense/transmission radius increases and the tuning of sensor transmission radius can prolong the network lifetime.