Title:
METHOD AND SYSTEM FOR USING BROADCAST CHANNEL FREQUENCIES TO PROVIDE DATA SERVICES OVER AN EXISTING CATV SYSTEM
Document Type and Number:
WIPO Patent Application WO/2004/105406
Kind Code:
A3
Abstract:
A direct broadcast satellite system (46) delivers video content to a subscriber
( 12) and a CATV network (38) is used to simultaneously provide data services to
the same subscriber Since the CATV system is not used to dehvei video/television
programming channels these same channels can be used to transport downstream
and upstream data signals To provide upstream performance and immunity to noise,
upstream data traffic signals are upconverted at a subscriber's cable
modem (44) for transmission by channels having center frequencies higher than
54 MHz Cable modem circuitry (44) combines the conventional output signal (52)
with the output of a local oscillator (56) to raise the carrier frequency of upstream
traffic before it is introduced to the CATV network (38) Thus, upstream traffic
can be earned by channels higher than 54 MHz This upstream signal is received by
a block converter (42) that lowers the carrier frequency back to a conventional
channel frequency before processing by a standard CMTS (8)
Inventors:
BUGAJSKI MARK (US)
ISAACS BRYANT (US)
HAVERKATE MARK (US)
HAVERKATE DAVID (US)
GILLFILLAN DANA (US)
BIONE ANGELO (US)
ISAACS BRYANT (US)
HAVERKATE MARK (US)
HAVERKATE DAVID (US)
GILLFILLAN DANA (US)
BIONE ANGELO (US)
Application Number:
PCT/US2004/016098
Publication Date:
January 17, 2008
Filing Date:
May 21, 2004
Export Citation:
Assignee:
ARRIS INT INC (US)
CHAMPION BROADBAND L L C (US)
CHAMPION BROADBAND L L C (US)
International Classes:
H04J3/16; H04N7/10; H04N7/173
Foreign References:
| US5826167A | 1998-10-20 | |||
| US6031878A | 2000-02-29 | |||
| US20020199202A1 | 2002-12-26 |
Attorney, Agent or Firm:
DOUGHTY, John (Inc.3871 Lakefield Driv, Suwanee GA, US)
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