Multiplex communications – Communication over free space – Repeater
Reexamination Certificate
2006-07-04
2006-07-04
Nguyen, Chau (Department: 2661)
Multiplex communications
Communication over free space
Repeater
C370S320000, C370S332000, C455S437000
Reexamination Certificate
active
07072311
ABSTRACT:
A method and apparatus for initiating a reverse link intergenerational handoff in a CDMA communication system that measures and compares parameters between a serving base station of one generation and a target base station of another generation to determine the best possible handoff initiation time instant for performing a reverse link intergenerational hard handoff. Different embodiments can utilize one of several procedures to determine the best possible handoff initiation time instant. A pilot signal strength embodiment determines a handoff initiation time instant based upon the total pilot signal strength of both a serving and target base station. An Eb/Ntembodiment determines a handoff initiation time instant based upon Eb/Nt(ratio of average power per bit to total received power spectral density) values of both a serving and a target base station. The method and apparatus decreases the probability of degraded or dropped calls during intergenerational handoffs.
REFERENCES:
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 5267261 (1993-11-01), Blakeney et al.
patent: 5594718 (1997-01-01), Weaver et al.
patent: 5697055 (1997-12-01), Gilhousen et al.
patent: 5848063 (1998-12-01), Weaver et al.
patent: 5940762 (1999-08-01), Lee et al.
patent: 5953320 (1999-09-01), Williamson et al.
patent: 5999816 (1999-12-01), Tiedemann et al.
patent: 6049716 (2000-04-01), Jung
patent: 6128493 (2000-10-01), Song
patent: 6233455 (2001-05-01), Ramakrishna et al.
patent: 6449481 (2002-09-01), Kwon et al.
patent: 6496493 (2002-12-01), Chung
patent: 6563810 (2003-05-01), Corazza
patent: 6567666 (2003-05-01), Czaja et al.
patent: 6714512 (2004-03-01), Tiedemann et al.
patent: 2001/0030948 (2001-10-01), Tiedemann
patent: 2002/0027890 (2002-03-01), Bernstein et al.
U.S. Appl. No. 60/159,050, filed Oct. 12, 1999, Anderson, et al.
“Upper Layer (Layer 3) Signaling Standard for cdma2000 Spread Spectrum Systems”, 3GPP2, C.S0005-0, Version 1.0, Jul. 1999, pp. 1-1 through F-6.
“Mobile Station-Base Station Compatibility Standard for Wideband Spread Spectrum Cellular Systems”, TIA/EIA Standard, ANSI/TIA/EIA-95-B-1999, approved Feb. 3, 1999, pp. 1-1 through G-2.
Anderson Kraig Lamar
Czaja Stanislaw
Yang Hong Kui
Jacquez & Associates
Jacquez, Esq. Martin J.
Moore Ian N.
Nguyen Chau
VIA Telecom Co. Ltd.
LandOfFree
Method and apparatus for initiating a reverse link... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for initiating a reverse link..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for initiating a reverse link... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3569315