Reduced time packet transmission in a wireless...

Details Reduced time packet transmission in a wireless... Reduced time packet transmission in a wireless...

2006-02-13

2011-12-06

Cai, Wayne (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S343000, C455S453000, C455S573000

Reexamination Certificate

active

08072921

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: 6212229 (2001-04-01), Salinger
patent: 7065378 (2006-06-01), Raissinia et al.
patent: 2002/0145968 (2002-10-01), Zhang et al.

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