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Positioning a mobile subscriber in a cellular network system based on signal strength

Positioning a mobile subscriber in a cellular network system based on signal strength. ABSTRACT finding the position of a mobile subscriber from a network each mobile device monitors signal strength, this helps in assisting the network to take timely handoff decisions. KEY WORDS

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Positioning a mobile subscriber in a cellular network system based on signal strength

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  1. Positioning a mobile subscriber in a cellular network system based on signal strength

  2. ABSTRACT finding the position of a mobile subscriber froma network each mobile device monitors signal strength, this helps in assisting the network to take timely handoff decisions

  3. KEY WORDS Positioning, Signal Strength, Network Measurement Report (NMR), Finger Printing, Multipath, Base Transceiver Station (BTS)

  4. INTRODUCTION The services offered by positioning system include navigation and routing finding point of interest which is also called POI, geo-coding

  5. RELATED WORK A GPS receiver provides location estimation based on the time of arrival of four or more L-band signals from a network of 24 satellites. It is possible to locate the position of a mobile station by measuring the Time of Arrival (TOA) or angle of arrival (AOA) of a signal at multiple locations

  6. THE METHOD The proposed system is a handset based technique that uses Network Measurement Report (NMR). The mobile device regularly forwards the NMR to the serving cell to assist the network to make handoff decisions.

  7. FTRIANGULAING A MOBILE USER • Triangulating a mobile device involves three • steps. • The first step is to retrieve the signal strength values from the related BTS. • The second step involves approximating the • distances from the corresponding BTS with the • help of the received signal strength. • The final step is geo-coding which involves • finding the actual geographic location of the mobile • device

  8. The three circle intersection is merely an extension of this problem and involves finding the intersection points of three circles and determining the most suitable point which is known as the epicentre. .

  9. ANALYSIS OF THE RESULTS The general relationship between the received signal strength and distance is given below in Figure

  10. CONCLUSION We have presented an approach to approximate the location or position of a mobile user based upon signal strength of a mobile device by using different values of ‘k’.

  11. REFERENCES [1] http://www.opnet.com “a web site reference to OPNET Modeler”. [2] J.H. Reed, K.J. Krizman, B. D. Woerner and T. S. Rappaport, “An Overview of the Challenges and Progress in Meeting the E-911 Requirement for Location Service,” IEEE Communications Magazine, 30-37, April 1998. [3] I. Ashkenazi B. Ben-Moshe. Radio-maps: an experimental study. Report, Ben-Gurion University, 2005. http://www.cs.bgu.ac.il/˜benmoshe/RadioMaps [4] T. A. Herring, "The Global Positioning System," Sci. Amer., Feb. 1996, pp. 44–50.

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