An Energy Efficient Routing Protocol in Wireless Sensor Networks

Wireless sensor network consisting of a large number of small sensors is effective for gathering various data in a variety of environments. Since each sensor operates on battery, energy efficient data transfer is indispensable to maximize the lifetime of the network. In this paper we propose a new data transfer protocol employed in large-scale wireless sensor network. Here only one designated cluster-head sends the data received from other cluster-heads to the base station during one round of communication. Also, we adopt a method that replaces weak cluster-head using a proxy node. Comparison with the existing schemes such as LEACH and PEACH through computer simulation reveals that the proposed scheme significantly improves the network lifetime for practical operational conditions.