A PSO Based Improved Localization Algorithm for Wireless Sensor Network

Wireless sensor network (WSN) is consisted of enormous amount of miniature devices recognized as sensor nodes empowered with sensing, processing, and computing abilities. The main role of WSN is sensing, gathering, and transmission of data to the destination. In several applications, the location of collected data is of much significance. Such type of information is acquired by a localization technique. So, localization is a vital issue in various applications of WSNs. On account of range estimates, the localization techniques can be divided into range based and range free. The range based schemes require added device, thus costly to implement in practice. Range free schemes reduce the expenditure because they do not need additional ranging device. Therefore, the range free methods are practiced as worthwhile alternatives to range based schemes. However, these schemes comprised more localization error as compared to range based schemes. Hence, to overcome the existing drawback of conventional DV-Hop, a PSO based improved localization algorithm is offered in this paper. Simulation results confirm that our proposed algorithm reduces the error and error variance of localization whereas improves the accuracy in comparison with the existing localization algorithms.