Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-01-25
2005-01-25
Maung, Nay (Department: 2684)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S437000, C455S069000, C455S522000
Reexamination Certificate
active
06847818
ABSTRACT:
A transmission power control technique allowing stable and reliable signal transmission in soft handover is disclosed. Each of the base stations involved in soft handover measures an amount of loss of the base station selection signal. When the amount of loss of the base station selection signal exceeds a threshold, the transmission power of the downlink signal is not set to the minimum level but to the normally controlled level. Further, a transmission power update timing of each base station is determined so that the downlink signal received at the mobile station changes in transmission power at a predetermined timing synchronized with that of other base stations.
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patent: 5845212 (1998-12-01), Tanaka
patent: 6141555 (2000-10-01), Sato
patent: 6539233 (2003-03-01), Taketsugu
patent: 0 936 751 (1999-08-01), None
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patent: WO 9859433 (1998-12-01), None
Furukawa (Technical Report of Institute of Electronics, Information and Communication Engineers, RC297-218, Feb., 1998, pp. 40, Second chapter). (In Japanese. See specification p. 2 for dicussion).
Dickstein Shapiro Morin & Oshinsky LLP.
Lee John J
NEC Corporation
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