Abstract - Location tracking systems have attracted a significant group of researchers during recent decades. Almost all these systems depend on customized hardware and/or trained personnel for their implementation. In this paper we describe a pure software based solution called WLAN (Wireless Local Area Network) Tracker which is based on signal strength measurements from different Wireless Access Points (WAPs). Unlike similar systems, WLAN Tracker, taken as a demonstrative example, is designed to operate in multistory buildings and features a simple Location Based Service (LBS) in order to provide text-based services to its clients. We investigate the performance of our system by comparing its location estimations to real values.

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