Network lifetime augmentation by EASR method in wireless sensor networks

A wireless sensor network (WSN) with spatially distributed autonomous sensors, to monitor physical and other environmental conditions such as temperature, sound, pressure, etc. and to cooperatively pass their data through the network to a main location. In wireless sensor networks, most important problem is to extend the lifetime of the networks as long as possible. Network lifetime can be increased by conserving the limited power resources of sensors while accomplishment of the sensing and sensed data reporting its tasks. In WSN, each sensor node delivers the sensed data to sink by multi-hopping technique. Generally, sensor nodes nearer to the sink will consume more battery power than further nodes. So these nodes will drain out their battery power rapidly and reduce the network lifetime. In this paper, we propose a method called Energy - Aware Sink Relocation (EASR) for mobile sinks in WSNs which is an efficient method to increase the network lifetime. This mechanism uses information of both transmission range of sensor nodes and scheme for sink relocation. Thereby, we included numerical methods to extend network lifetime and further the results are plotted in NS2 platform.

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