Providing location services within a radio cellular network using ellipse propagation model

Mobile positioning is becoming an important service on radio cellular network. Among different kind of location estimation technologies, the one, which estimates the location of mobile stations using signal strength is able to be applied to different kinds of cellular network, and therefore, is more general. We have designed a directional propagation model - the ellipse propagation model (EPM), which makes use of a wave propagation model to perform location estimation. The EPM enhanced the traditional propagation model by resembling the contour line of signal strength as an ellipse rather than a circle and hence becoming more realistic. We have tested the EPM with real data taken in Hong Kong and it is proven that the EPM out performing other existing location estimation algorithms in different kinds of terrains.

[1]  Claudia Chui,et al.  A Study on the Sensitivity of the Center of Gravity Algorithm for Location Estimation , 2003 .

[2]  Ulf Leonhardt,et al.  Supporting location-awareness in open distributed systems , 1998 .

[3]  Peter J. Brown,et al.  Context-aware applications: from the laboratory to the marketplace , 1997, IEEE Wirel. Commun..

[4]  Joseph Kee-Yin Ng,et al.  A dual-channel location estimation system for providing location services based on the GPS and GSM networks , 2003, 17th International Conference on Advanced Information Networking and Applications, 2003. AINA 2003..

[5]  Guanling Chen,et al.  A Survey of Context-Aware Mobile Computing Research , 2000 .

[6]  Henry Tirri,et al.  A Statistical Modeling Approach to Location Estimation , 2002, IEEE Trans. Mob. Comput..

[7]  V. Padmanabhan,et al.  Enhancements to the RADAR User Location and Tracking System , 2000 .

[8]  Winton Afrić.  A Method for Implementing Mobile Station Location in GSM , 2001 .

[9]  Jeffrey H. Reed,et al.  Position location using wireless communications on highways of the future , 1996, IEEE Commun. Mag..

[10]  Joseph Kee-Yin Ng,et al.  Locating mobile stations with statistical directional propagation model , 2004, 18th International Conference on Advanced Information Networking and Applications, 2004. AINA 2004..

[11]  Richard Klukas.  Cellular Telephone Positioning Using GPS Time Synchronization , 1997 .

[12]  Mohamed-Slim Alouini.  Global Positioning System: an Overview , 2022 .

[13]  Deborah Estrin,et al.  GPS-less low-cost outdoor localization for very small devices , 2000, IEEE Wirel. Commun..

[14]  Gaetano Borriello,et al.  Location Systems for Ubiquitous Computing , 2001, Computer.