Dynamic scheduling with energy-efficient transmissions in hierarchical wireless sensor networks

摘要

This study proposes a number of scheduling schedules for data transmission in cluster-based wireless sensor networks in order to make energy-saving improvements to sensor nodes. The four states are defined in each network cycle so that sensor nodes can report the events happened in the network. A clustering mechanism creates appropriate network topologies to distribute energy consumption among energy-sufficient sensor nodes. Nodes can adjust the duty cycles for data collection during network lifetime. The scheduling schemes reduce the probabilities of communication collision and duplicate transmission using a broadcast delay. We examine the storage, communication, and computation requirements for the proposed scheduling scheme. All the overheads are sensible, given the current state of device technology of sensor nodes. The experimental results show that nodes work in high efficiency cluster-based networks by the proposed schemes.