New methods for location service in the WCDMA system

• Autorzy: Stefański J.
• Języki publikacji: EN

Abstrakty

EN

New methods for a location service (LCS) in the Wideband Code Division Multiple Access (WCDMA) system are elaborated. These methods base on the observed time difference of arrival (OTDOA) algorithm. The classic OTDOA in the WCDMA system, to calculation of the geographical position of a mobile station (MS), needs a knowledge of relative time differences (RTDs) between base stations. In this reason, the LCS implementation is difficult and rather expensive. The proposed methods do not require RTDs. The elimination of the RTD parameters significantly simplifies the localization process in the 3G (3rd Generation) real-life cellular networks. The usefulness of the methods for location service implementation is analysed. The simulation model is outlined and simulation results of the proposed methods are presented. These results show that in the extremely bad conditions, i.e. in urban environment, the proposed algorithms fulfil the requirements for emergency calls from cellular phones in relation to accuracy of MS position calculation.

Słowa kluczowe

EN

location service; LCS; location based service; LBS; radio navigation; OTDOA

PL

serwis lokacyjny; radionawigacja

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: Electronics and Telecommunications Quarterly
• Rocznik: 2008
• Tom: Vol. 54, No 1
• Strony: 53--66
• Opis fizyczny: Bibliogr. 15 poz., rys., wykr.

Twórcy

autor

Stefański J.

• Gdańsk University of Technology, Department of Radiocommunication System and Networks, ul. Narutowicza 11/12, 80-952 Gdańsk,

Bibliografia

• 1. A. Kupper: Location-based Services, Fundamentals and Operation, Wiley & Sons, 2005.
• 2. J. Stefański: Simplified Algorithm for Location Sendee for the UMTS, Proc. of IEEE 62nd Vehicular Technology Conference, vol. 4,2005, pp. 2741-2744.
• 3. J. Stefański: Method of Location of a Mobile Station in the WCDMA System without Knowledge of Relative Time Differences, Proc. of IEEE 65th Vehicular Technology Conference, April 2007, pp. 674-678.
• 4. Y. T. Chan, K. C. Ho: A Simple and Efficient Estimator for Hyperbolic Location, IEEE Transactions on Signal Processing, vol. 42, no. 8, August 1994, pp. 1905-1915.
• 5. 3GPP Technical Specification: Technical Specification Group Radio Access Network; Physical layer – Measurements (FDD),3GTS 25.215.
• 6. W. H. Foy: Position-location solutions by Taylor-series estimation, IEEE Trans. Aerosp. Electron. Syst., vol. AES-12, March 1976, pp. 187-194.
• 7. 3GPP Technical Specification: Technical Specification Group Radio Access Network; Physical layer procedures (FDD), 3GTS 25.214.
• 8. W. H. Sheen, J. K. Tzeng, C. K. Tzou: Effects of Cell Correlations in a Matched-Filter PN Code Acquisition for Direct-Sequence Spread-Spectrum Systems, IEEE Tran. on Vehicular Tech., vol. 48, no. 3, 1999, pp. 724-732.
• 9. J. P. Ianniello: Large and Small Error Performance Limits for Multipath Time Delay Estimation, IEEE Tran. on Acoust., Speech, and Sig. Proc., vol. ASSP-34, No. 2, 1986, pp. 245-251.
• 10. ETSI: Universal Mobile Telecommunications System (UMTS); Selection procedures for the choice of radio transmission technologies of the UMTS, TR 101 112, ver. 3.2.0, Apr. 1998.
• 11. Y. Jeong, H. You, C. Lee: Calibration of NLOS error for positioning systems, Proc. of IEEE 53rd Vehicular Technology Conference, vol. 4, 2001, pp. 2605-2608.
• 12. L. J. Greenstain, V. Erceg, Y. S. Yen, M. V. Clark: A new path-gain/delay-spread propagation model for digital cellular channels, IEEE Trans. on Vehicular Tech., vol. 46,1997, pp. 477-485.
• 13. D. N. Hatfield: A Report on Technical and Operational Issues Impacting the Provision of Wireless Enhanced E91I Services, Federal Communications Commission, September 2002.
• 14. E. Grosicki, K. Abed-Meraim, P. Loubaton, J. M. Chaufray: Comparison of Downlink Mobile Positioning Methods for the UMTS FDD Mode without Using IPDL Periods, Proc. of 7th International Symposium on Signal Processing and its Applications, vol. 2, 2003, pp. 347-350.
• 15. S. Moshavi, D. Yelli, J. S. Sadowsky, Y. Perets, K. Pick: Pilot Interference Cancellation Technology for CDMA Cellular Networks, IEEE Trans, on Vehicular Tech., vol. 54, no. 5, 2005, pp. 1781-1792.