Date Added: Apr 2011
In this paper, the authors address the fundamental question concerning the limits on the network lifetime in sensor networks when multiple Base Stations (BSs) are deployed as data sinks. Specifically, they derive upper bounds on the network lifetime when multiple BSs are employed, and obtain optimum locations of the base stations that maximise these lifetime bounds. For the case of two BSs, they jointly optimise the BS locations by maximising the lifetime bound using genetic algorithm. Joint optimisation for more number of BSs becomes prohibitively complex.