Review of various localization techniques in wireless sensor networks

Abstract

A network which consist of very small devices known as Sensor Nodes. WSN is a rapidly developing area which is gaining considerable research in scientific community. One of the major issue in WSN is localization of the nodes. It estimates nodes position and information given by nodes is worthless without knowledge of their geographical positions. In different application scenarios including environmental monitoring (like temperature, pressure, humidity etc.), health care, industrial controlling, inventory system, traffic control monitoring, target tracking, in rescuing other emergency situations etc. node localization has significant demand. Localization process is useful in many aspects such as to report the origin of events, routing and network coverage. This paper review and analyze various localization techniques and focus on various open research issues in localization.