Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2003-09-18
2008-10-14
Feild, Joseph (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S436000, C455S437000, C455S442000, C455S434000
Reexamination Certificate
active
07437152
ABSTRACT:
A control method of searching for a neighboring cell of a mobile station communicating with a base-station is provided in a direct sequence CDMA mobile communication system which transmits information by carrying out double modulation using a first spreading code group and a second spreading code. The first spreading code group includes spreading codes that have a same repetition period as an information symbol period and are used in common by the base stations, and the second spreading code has a repetition period longer than the information symbol period. The base stations are assigned different second spreading codes. The control method stores at least one second spreading code and its phase into a first table, which second spreading code corresponds to a perch channel whose second spreading code and phase are known; stores a second spreading code used by a neighboring base station into a second table; searches for a perch channel whose second spreading code and phase are unknown; and searches for a perch channel whose second spreading code and phase are known. The neighboring cell search method can save the power consumption and time required for the mobile station to carry out the cell search with preventing an increase in the total cost of the system.
REFERENCES:
patent: 5574996 (1996-11-01), Raith
patent: 5577022 (1996-11-01), Padovani
patent: 5794141 (1998-08-01), Zicker
patent: 5920549 (1999-07-01), Bruckert et al.
patent: 5987012 (1999-11-01), Bruckert et al.
patent: 6044069 (2000-03-01), Wan
patent: 6154455 (2000-11-01), Mekkoth et al.
patent: 6157820 (2000-12-01), Sourour et al.
patent: 6195551 (2001-02-01), Kim et al.
patent: 6504830 (2003-01-01), Ostberg et al.
patent: 6505042 (2003-01-01), Hafiz
patent: 6542743 (2003-04-01), Soliman
patent: 6625134 (2003-09-01), Ji et al.
patent: 6628631 (2003-09-01), Mazawa et al.
patent: 6819927 (2004-11-01), Sato
patent: 6845238 (2005-01-01), Muller
patent: 197 54 204 (1998-06-01), None
patent: 0 796 025 (1997-09-01), None
patent: 0952430 (1998-07-01), None
patent: 0892503 (1999-01-01), None
patent: 2 320 654 (1998-06-01), None
patent: 2 320 655 (1998-06-01), None
patent: 2 317 077 (1998-11-01), None
patent: WP97/33400 (1997-09-01), None
patent: 10-126830 (1998-05-01), None
patent: 10191428 (1998-07-01), None
patent: 11-112405 (1999-04-01), None
patent: 2000-358266 (2000-12-01), None
patent: WO 95/12932 (1995-05-01), None
patent: WO 99/67972 (1999-12-01), None
Official Notice of Rejection, Case No. DCMH110139 , Apr. 30, 2004 Patent Application No. 11-260409, Apr. 26, 2004.
Official Notice of Rejection, Case No. DCMH110127 , Aug. 3, 2004 Patent Application No. 11-252294 , Jul. 28, 2004.
Austrian Patent Office Service and Information Sector (TRF) Search Report , Dec. 9, 2004 Application No. 200005023-7 , Sep. 5, 2000.
Higuchi, et al., “Fast Cell Search Algorithm In Inter-Cell Asynchronous DS-CDMA Mobile Radio,” IEICE Trans. Communication, vol. E81-B, No. 7, Jul. 1998.
“Japan's Revised Proposal For Candidate Radio Transmission Technology On IMT-2000: W-CDMA, (W-CDMA Revised Proposal Version 1.1),” Sep. 1998, ARIB IMT Study Committe.
Yunoki, et al., Cell Search Strategy on W-CDMA Mobile Station, IEICE General Conference, B-5-186 of the 1999 General Meeting [partial translation].
Higuchi, et al., “Experiments on fast cell search algorithm for intercell asynchronous W-CDMA mobile radio,” Electronics Letters, Jun. 24, 1999, vol. 35, No. 13.
3G TS 25.211 V3.3.0 (Jun. 2000), Technical Specification, Valbonne, France.
Higuchi, et al., “Fast Cell Search Algorithm using Long Code Masking in DS-CDMA Asynchronous Cellular System,” IEICE, 1997 [partial translation].
European Search Report for EP 00 30 7671, Nov. 27, 2001.
Higashi Akihiro
Ishikawa Yoshihiro
Onoe Seizo
Yunoki Kazufumi
Feild Joseph
Nguyen Huy D
NTT DoCoMo Inc.
Workman Nydegger
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