[ETCTR] efficient target localization by controlling the transmission range in wireless sensor networks

The applications of sensor networks are getting critical and important particularly in strategic, applications such as corresponding target detection, surveillance, and target localization. To accomplish target detection and localization data from more then three sensors which receive signals from moving targets, measure RSSI, and translate RSSI into the distance between sensor and target. All this process involves more sensor and energy consumption. Where as the energy is a critical resource in wireless sensor networks and network lifetime needs to be long-drawn-out through the use of energy-conscious sensing strategies during system operations. We introduce an efficient-localization algorithm using only one sensor and auto controlling the transmission rage of its one hope neighbor sensors. Algorithm provides the precise location of the target by using signal strength and velocity of the object. It takes minimum resources of networks, which makes the network prolong. Our approach ETCTR adopt the multicasting for transmission settlement rather then broad casting that minimize the communication cost of the network. This algorithm contributes to increase the overall lifetime of sensor networks. Results illustrate that our approach provide better localization of the target utilizing less power consumption, less communication cost and extended network life.