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Localization with enhanced location accuracy using RSSI in WSN

Recent advances in wireless communication, low power sensors and microcontrollers enable the deployment of large-scale wireless sensor networks. A fundamental problem in wireless sensor networks is localization i.e. determination of geographical locations of sensor nodes. This paper addresses the problem of location discovery of the nodes in wireless sensor network. We propose a localization technique by means of which a sensor node can determine its location with enhanced accuracy by listening wireless transmissions from three or more beacons. The proposed method is based on RSSI technique that does not require any additional complexity in construction of the sensor nodes. Performance of the proposed localization scheme is compared with one of the existing schemes. Qualitative analysis is done considering communication, storage and computational overhead as performance metrics, whereas quantitative analysis is done considering localization error as a performance metric. The results confirm our scheme's supremacy over the competing scheme.