Low cost solution for location determination of mobile nodes in a wireless local area network

摘要

In this research paper we undertook the problem of Location Determination of Mobile nodes in a Wireless Local area network, as finding out the location in a wireless environment is to-date not very easy, cheap and accurate using 802.11b technology. We used the classical method of Triangulation with a little alteration which is later on described in the paper. Another method we used is the methods of calibration by research to produce more accurate results and also to cross verify the results of the method of Triangulation. The work in this paper attempts to illustrate the different aspects of the problem of location determination in WiFi networks. We started with an investigation of the influence that network characteristics have on the ability of middleware location determination protocols to accurately estimate position of mobile nodes. We presented an implementation based study that demonstrated the strong relationship between the two of the location determination methods and their performance.The main objective of this paper is to provide method in which no dedication hardware is required. Only Wireless Lan card is required and can be placed in any suitable location. The significance of this result lies in allowing a network designer to make a suitable tradeoff between QoS of location determination and other application protocols while choosing a network topology. The combination of two methods reduced the error rate of locating a mobile node to a great extent. The results were being plotted on a given map using both the algorithms.