Interactive video distribution systems – Video distribution system with upstream communication – Having link to external network
Reexamination Certificate
2003-10-01
2009-06-16
Koenig, Andrew Y (Department: 2423)
Interactive video distribution systems
Video distribution system with upstream communication
Having link to external network
C725S118000
Reexamination Certificate
active
07549156
ABSTRACT:
A programmable channel scanning and acquisition method for a cable modem first performs a fast scan and then a slow scan to identify channels supporting cable modem services. The fast scan involves only a check of the cable modem AGC lock. A list of potentially operational channels is assembled and scanned. The list includes, in order of preference, the last known good channel, golden channels that are likely to support cable modem services, “learned” golden channels consisting of previous last known good channels, and other channels within the frequency plan range. The list omits channels on a “black list” known not to be operational and channels outside of the frequency range, except during registration. The method may be optimized by the setting of various parameters for operation in a DOCSIS or EuroDOCSIS environment.
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Broadcom Corporation, BCM3300 QAMLink® Single-Chip Docsis Cable Modem—BCM3300 Product Brief, 2003.
Grove Bruce A.
Hebron Yoav
Kwong Adrian
Li Gordon Y.
Koenig Andrew Y
NXP B.V.
Sawaged Sari
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