Collision-Based Localization for Small Scale Mobile Wireless Sensor Networks

Location awareness is important in most of the wireless sensor networks. Many localization schemes have been proposed for both static and mobile wireless sensor networks. However, most of them aim at localizing the sensor nodes with global coordinate by using additional ranging hardware or anchors knowing its global position. These schemes may suffer from the problem of no reference coordinate system when there is no anchor knowing global coordinate. This paper proposes a distributed localization mechanism based on collision among mobile nodes for small scale mobile wireless sensor networks. And the scheme is range-free and self-organized. In our approach, nodes work as swarms to move and communicate with others. And finally, a relative coordinate system is established among the nodes. The algorithm has been evaluated based on simulator. The simulation results show that our scheme can finish the establishment of the relative coordinate system in finite time and the increase of nodes will speed up the process.