Mobility

Coverage-Time Optimization for Clustered Wireless Sensor Networks: A Power-Balancing Approach

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Executive Summary

In this paper, the authors investigate the maximization of the coverage time for a clustered Wireless Sensor Network (WSN) by optimal balancing of power consumption among Cluster Heads (CHs). Clustering significantly reduces the energy consumption of individual sensors, but it also increases the communication burden on CHs. To investigate this trade-off, the analytical model incorporates both intra- and inter-cluster traffic. Depending on whether location information is available or not, they consider optimization formulations under both deterministic and stochastic setups, using a Rayleigh fading model for inter-cluster communications. For the deterministic setup, sensor nodes and CHs are arbitrarily placed, but their locations are known. Each CH routes its traffic directly to the sink or relays it through other CHs.

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