Paper Title
Energy Aware Localization In Wireles Sensor Network Using LUSA

The technique of finding physical co-ordinates of a node is known as localization Importance of localization arises from the need to tag the sensed data and associate events with their location of occurrence. Location information of a sensor node can be obtained by using GPS. But, installing GPS in every node is not a feasible solution. This is because: (i)sensor nodes are deployed in a very large number. Installing GPS at every node will increase the cost as well as size, (ii) GPS consume power, which will effect the network lifetime. Moreover, location cannot be pre-programmed as it is unknown where nodes will be deployed during their operational phase.In this thesis, we have made an attempt to address localization in static sensor networks. For static network we have proposed distributed range based localization techniques called (i) Localization using a single anchor node (LUSA),this technique is proposed for grid environment. In LUSA, we have identified three types of node: anchor, special an unknown node. For every anchor node there exists two special node and they are placed perpendicular to the anchor node. Localization in LUSA is achieved by a single anchor node and two special nodes. Localization occurs in two steps. First special nodes are localized and then the unknown nodes. We have compared LUSA with a closely related localization technique called Multi-duolateration(MDL). It is observed that the localization error and localization time is lesser in LUSA. This not only reduces the localization time but also the dependency. Key words- Multi-Duolatertion(MDL), LUSA, beacon node ,Settled node.