On Improvement of Anchor-Free Localization in Zigbee Sensor Network

Abstract

A localization scheme for wireless sensor networks is presented in this paper. The presented scheme is an anchor free scheme, in which none of geometrical information is necessary for sensor nodes. Thus, only local interaction among sensor nodes is required for estimating the locations of the sensor nodes. This scheme employs the link quality indicator (LQI) and hop count between the sensor nodes for estimation. Our experiments involve the implementation of the proposed scheme on Zigbee sensor modules. The results of the experiments indicate that estimation can be successfully carried out for networks comprising four sensor nodes.