Method for sharing an upstream among multiple downstreams

Details Method for sharing an upstream among multiple downstreams Method for sharing an upstream among multiple downstreams

2007-11-20

2007-11-20

Orgad, Edan (Department: 2616)

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

C370S230000, C370S252000, C370S392000, C370S503000

Reexamination Certificate

active

10295712

ABSTRACT:
A process and apparatus for sharing an upstream between multiple downstreams. A automatic discovery process carried out by the CMTS using ranging messages is used to build routing tables that define which cable modems are coupled to each downstream. The downstreams are coordinated in timestamps, MAP messages and UCD messages, and symbol clock frequency if synchronous code division multiplexed bursts are allowed upstream. Also disclosed is a flexible mapper/splitter/combiner that can electronically control switching, combining and splitting as necessary to couple multiple downstreams that share the same upstream onto the same optical nodes or split downstreams that share the same upstream among multiple optical nodes and combine upstreams from multiple HFC systems onto a single upstream input to a CMTS receiver so the CMTS receiver can be fully utilized.

REFERENCES:
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patent: 6917614 (2005-07-01), Laubach et al.
patent: 7085287 (2006-08-01), Chapman
patent: 7164697 (2007-01-01), Beser

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