An Optimal Lifetime Model and It′s Solution of a Heterogeneous Surveillance Sensor Network
Yang Jing Wen · Chinese Journal of Computers · 2007
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.