Pulse or digital communications – Transceivers – Modems
Reexamination Certificate
2004-11-13
2010-12-21
Vo, Don N (Department: 2611)
Pulse or digital communications
Transceivers
Modems
Reexamination Certificate
active
07856049
ABSTRACT:
A cable modem communication system includes a plurality of Cable Modems (CMs), a CM network segment, and a Cable Modem Termination System (CMTS). The CMTS segregates the plurality of CMs into a first group of CMs with which standard registering and ranging operations are performed and a second group of CMs with which attenuated transmission registering and ranging operations are performed. Each CM of the first group of CMs operable to perform registering and ranging operations by transmitting a ranging burst of a first format. Each CM of the second group of CMs operable to perform registering and ranging operations by transmitting a ranging burst of a second format that differs from the ranging burst of the first format. The CMTS may include a rake receiver that receives and demodulates a plurality of multi-path copies of the ranging burst of the second format.
REFERENCES:
patent: 6643780 (2003-11-01), Cooper
patent: 2002/0062450 (2002-05-01), Carlson et al.
patent: 2006/0080650 (2006-04-01), Winters et al.
Currivan Bruce J.
Kolze Thomas J.
Pantelias Niki R.
Prodan Richard S.
Broadcom Corporation
Garlick Bruce E.
Garlick & Harrison & Markison
Vo Don N
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