Tradeoff between energy consumption and lifetime in two tiered wireless sensor networks

Abstract

The optimal location of a base station can be analyzed with two different aspects, first one is the minimum energy expenditure and second is the maximum lifetime of a Wireless Sensor Networks (WSN). Both objectives are similar but they differ mathematicaly. The optimal location of base station is centroid of the distributed nodes, when all the nodes suffers free space loss from the base station. The geometric median-4 is the optimal position if the sensor nodes suffer multipath loss from the base station, and center of the minimum enclosing circle is the optimal location for the n-of-n lifetime. In this paper, we have proposed a method to place the base station, while allowing the trade-off between lifetime and energy consumption in two tiered wireless sensor network.