Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-06-06
2006-06-06
Appiah, Charles (Department: 2686)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S442000, C370S331000
Reexamination Certificate
active
07058404
ABSTRACT:
The invention relates to a method for carrying out a so-called “blind handover” in an intersystem and interfrequency handover in mobile communication systems and builds on the fact that before the handover a mobile station is supplied by several base stations, i.e., in addition to the supplying base station, it can also receive signals from several other base stations. According to the invention a propagation time measurement is carried out at the air interface by the mobile station of the signals received from the base stations. The measured propagation times are transmitted to one of the base stations. Thereupon the residence site of the mobile station is determined on the part of the mobile communication network based on the transmitted propagation time measurement data. With the aid of a data base, subsequently and based on the determined residence site, at least one suitable base station for an intersystem or interfrequency handover is selected, and the data of the selected base station required for a handover are transmitted to the mobile station. Based on this information the mobile station can carry out the handover to the selected base station.
REFERENCES:
patent: 5487174 (1996-01-01), Persson
patent: 5850600 (1998-12-01), Dixon
patent: 6073021 (2000-06-01), Kumar et al.
patent: 6154657 (2000-11-01), Grubeck et al.
patent: 6240292 (2001-05-01), Haberman et al.
patent: 6477183 (2002-11-01), Yamamoto
patent: 6741577 (2004-05-01), Henon
patent: 6816729 (2004-11-01), Halonen
patent: 6829485 (2004-12-01), Abrishamkar et al.
patent: 6876853 (2005-04-01), Hokkanen
patent: 198 03 960 (1998-08-01), None
patent: 197 41 701 (1999-03-01), None
patent: 198 36 778 (2000-02-01), None
patent: 199 16 688 (2000-10-01), None
patent: 1 213 941 (2002-06-01), None
patent: PCT WO 99/012378 (1999-03-01), None
patent: PCT WO 00/28774 (2000-05-01), None
patent: PCT WO 02/01902 (2002-01-01), None
3GPP:TS 25.305 V3.6.0 (Jun. 2001) 3rd Generation Partnership Proj.: Technical Spec. Group Radio Access Network; Stage 2 Funct. Spec. UE Positioning in UTRAN (Release 1999).
Oliver Balbach, “UMTS—Competing Navigation System and Supplemental Communication System to GNSSS,” Sep. 19-22, 2000.
Jacek Biala, “Mobilfunk und intelligente Netze.” Vieweg Verlag: 1995, 184-85.
3GPP:TS 23.009 V5.1.0 (Jun. 2002) “3rd Generation Partnership Project: Technical Specification Group Core Network, Handover procedures” (Release 5).
Appiah Charles
Greenspan, Esq. Myron
Lackenbach & Siegel LLP
Ly Nghi H.
T-Mobile Deutschland GmbH
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