Multiple upstream channel descriptor messages pointing to...

Details Multiple upstream channel descriptor messages pointing to... Multiple upstream channel descriptor messages pointing to...

2011-03-01

2011-03-01

Ngo, Ricky (Department: 2464)

Multiplex communications

Diagnostic testing

Path check

C370S389000, C370S437000, C370S468000, C370S538000, C725S111000

Reexamination Certificate

active

07898967

ABSTRACT:
In a DOCSIS-based communications system, different upstream channel descriptors (UCDs) all identify a single logical upsteam channel identifier (UCID) regardless of the type of cable modem (CM) to which the UCDs are sent. Different CMs having different capabilities (e.g., CMs configured according to the different DOCSIS standards 1.x, 2.0, and 3.0) receive their respective UCDs from an upstream headend. All the UCDs, however, refer to the same logical upstream channel. The different CMs therefore share this single logical upstream channel.

REFERENCES:
patent: 6459703 (2002-10-01), Grimwood et al.
patent: 2004/0008683 (2004-01-01), Cloonan et al.
patent: 2004/0233926 (2004-11-01), Cummings
patent: 2005/0025145 (2005-02-01), Rakib et al.
patent: 2005/0078699 (2005-04-01), Cummings
European Search Report, for European Patent Application No. 06023165.1, 6 pages, dated May 3, 2007.
Data-Over-Cable Service Interface Specifications DOCSIS 2.0: Radio Frequency Interface Specification, pp. 1-40, and 137-140, Cable Television Laboratories, Inc., Copyright 1999-2005.
Data-Over-Cable Service Interface Specifications DOCSIS 3.0: MAC and Upper Layer Protocols Interface Specification, pp. 1-100, Cable Television Laboratories, Inc., Copyright 2006.

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