Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-05-09
2006-05-09
Nguyen, Lee (Department: 2682)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S437000, C455S440000, C455S443000, C455S438000, C455S442000, C370S331000, C370S332000, C370S333000
Reexamination Certificate
active
07043242
ABSTRACT:
A method and device for avoiding adjacent channel interference and reducing disconnections caused thereby, during communication between a mobile device and a base station in a wireless telecommunications network. The mobile device measures the strength of a received signal before the signal enters one or more selected filters, and compares the strength of the signal after the filtering, in order to estimate a power ratio of the adjacent channel interference to communication channel power. If the power ratio is greater than a threshold, then a handover is requested to an alternative communication channel available between the mobile device and either the base station or another base station.
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Copy of co-pending U.S. Appl. No. 09/457,918, filed Dec. 9, 1999, entitled “Timing of Handover”.
Haapoja Sami
Jansen Kaj
Kuiri Tapio
Lilja Harri
Numminen Jussi
Nguyen Lee
Nokia Corporation
Pan Yuwen
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