Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2009-08-31
2010-06-29
Nguyen, Duc (Department: 2617)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C455S522000, C370S344000
Reexamination Certificate
active
07746823
ABSTRACT:
System and method for reducing acquisition time of packets in a FDD system, such as a spread-spectrum or OFDM system. A remote unit transmits a multi-tone packet. The multi-tone packet has a plurality of tones with each tone having a different power level, and at a different frequency, from other tones in the plurality of tones. The base station receives the multi-tone packet. The base station compares the plurality of tones from the received multi-tone packet to a threshold or other selection criteria. A tone is selected from the plurality of tones meeting desired selection criteria. Based on the selected tone, the base station transmits a BS packet with the BS packet having power information from the power level of the selected tone.
REFERENCES:
patent: 2006/0281476 (2006-12-01), Lane et al.
Garodnick Joseph
Schilling Donald L.
Huynh Chuck
Linex Technologies Inc.
Nguyen Duc
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