Efficient data gathering in wireless sensor network using mobile sink

In wireless sensor networks data gathering is very important task. Nowadays analysis has been targeted on decreasing the energy consumption of the WSN. To solve this drawback the conception of movable sink is presented. In this approach mobile sink gather the inform the static sensors of the network and transfer it to base station. For efficiently gather the data sink's mobility pattern should be decided so the data collection time will be reduced. Sink Trail (ST) and Sink Trail-S (STS) protocols are used to find shortest path for data forwarding through the nodes to sink. Constant updating of unnecessary sink location needs to be reduced. Therefore STS protocol is proposed to overcome the difficulty of ST protocol. The logical coordinate system (LCS) is proposed for the ease of routing and forwarding and because of it any location prediction strategy or GPS not required. This protocol enhances the energy efficiency. We analyze the impact of broadcasting frequency on route length and energy consumption. The simulation result of ST with data aggregation demonstrates that the proposed method reduces the amount of network traffic which helps to reduce energy consumption.