Cross-Layer Optimization on Charging Strategy for Wireless Sensor Networks Based on Successive Interference Cancellation

摘要

Communication interference and the energy limitation of nodes seriously hamper the fundamental performance of wireless sensor networks (WSN) such as throughput and network lifetime. In this paper, we focus on the Successive Interference Cancellation (SIC) aiming to realize multi-node concurrency communication and propose a heuristic power control algorithm. To prolong the network lifetime, we consider the scenario of mobile wireless charging equipment (WCE) periodically charging each node's battery wirelessly. Time-slice scheduling scheme and energy consumption optimization protocol are adopted to design an efficient cross-layer charging strategy. Then we use a near-optimal method to transform the original problem into a linear problem which yields identical optimal value. Simulation results demonstrate that adopting SIC and WCE can greatly improve channel utilization ratio and increase network throughput by 200% to 500% while ensuring the network lifetime.