A Population Based Approach to Model Network Lifetime in Wireless Sensor Networks

摘要

The physical constraints of battery-powered sensors impose limitations on their processing capacity and longetivity. As battery power in the nodes decays, certain parts of the network may become disconnected or the coverage may shrink, thereby reducing the reliability and the potency of the sensor network. Since sensor networks operate unattended and without maintainence, it is imperative that network failures are detected early enough so that corrective measures can be taken. Existing research has primarily concentrated on developing algorithms, be it distributed or centralized, to optimize network longetivity metrics. For instance, propose MAC layer optimizations to prolong longetivity, while look at the problem from a Layer 3 perspective. Works along the lines of actually building network models for energy consumption are addressed in [2], [3], but these models fail to capture the interplay between a node's spatial location and it's energy consumption.