Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2006-01-18
2009-12-29
Moore, Ian N (Department: 2416)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C455S437000
Reexamination Certificate
active
07639649
ABSTRACT:
A novel method and apparatus for initiating a reverse link intergenerational handoff in a CDMA communication system is disclosed. The inventive reverse link intergenerational handoff initialization method and apparatus 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. The method and apparatus can utilize one of several embodiments 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. The 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 disclosed method and apparatus decreases the probability of degraded or dropped calls during intergenerational handoffs.
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Anderson Kraig Lamar
Czaja Stanislaw
Yang Hong Kui
Huffman James W.
Moore Ian N
VIA Telecom Co. Ltd.
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