Achieving energy-balance with unequal clustering under single-hop transmission in wireless sensor networks

摘要

In cluster-based protocols, cluster heads (CHs) located far from the base station (BS) always consume more energy than those nearby under single-hop transmission. These CHs reach their end of life earlier than others and limit the network lifespan. This study presents a new algorithm that attempts to achieve energy consumption balance of sensor nodes. An analysis is made on the basis of energy consumption difference of sensor nodes which is caused by diverse transmission distances. Furthermore, the optimal unequal cluster size is obtained according to the distance between node and the BS. The number of CHs has an increasing tendency along with increasing distance to the BS. By comparing our algorithm with LEACH, EECS and I-LEACH, the network lifespan is prolonged by up to 66.7%, 51.8% and 33.1% respectively, and the proposed algorithm balances the energy consumption of nodes effectively.