Date Added: Sep 2010
Localization of sensor nodes is important in many aspects in wireless sensor networks. The known location of sensor node helps in determining the event of interest. A mobile sink is introduced to track the event driven sensor nodes in the path of the event, thus conserving energy and time. The authors present a novel range based localization algorithm which helps the mobile sink to compute the location of the sensor nodes efficiently. The data transfer from the mobile sink and the sensor nodes is used to estimate the sensor location. The sensor nodes do not need to spend energy on neighbouring interaction for localization.