Cluster based Wireless Sensor Networks' optimization under Energy Constraints

Wireless sensor networks (WSN) are being widely studied through the last few years. Power limitation is considered as the most significant constraint since it directly influences the network lifetime and hence application quality of service (QoS). Different power-based routing and data gathering strategies are proposed in the literature. Most of them are driven for specific applications and/or specific network topologies. In this paper, we propose a Power based framework for heterogeneous cluster based sensor networks. The proposed scheme simultaneously maximizes the application lifetime by fairly balancing energy consumption over the different sensors' activities. The proposed framework is then formulated as an optimization problem and performance results are presented.