Cisco Technology, Inc.

Nicos Achilleoudis

John T Chapman

Feisal Y Daruwalla

Robert Goguen

Pawel Piotr Sowinski

Anlu Yan

De Fu Li

Richard Meller

Chad Mikkelson

Paul Thomas Bradley

Roland G Chan

Jin Sheng

In one example, a Cable Modem Termination System (CMTS) determines target Radio Frequency (RF) bandwidth amounts for Data Over Cable System Interface Specification (DOCSIS) bonding groups according to the DOCSIS priority of active flows within the bonding groups. The CMTS then tunes bandwidth allocation amongst the DOCSIS bonding groups according to the target bandwidth amounts. The target bandwidth amounts can be recalculated at intervals, and the bandwidth allocation re-tuned at the intervals, to account for changes in flow activity or DOCSIS priority assignment.

Dynamically and fairly allocating RF channel bandwidth in a wideband cable system

In one embodiment, a Cable Modem Termination System (CMTS) generates a bandwidth grant message corresponding to a time segment. The CMTS identifies a portion of the time segment to be assigned according to received bandwidth request messages originating from downstream cable modems. The CMTS determines whether a remaining portion of the time segment can accommodate more than N broadcast contention slots, and if so, selects at least one of the cable modems for receiving an upstream bandwidth boost.

CMTS upstream channel bandwidth scheduler

The present disclosure relates an improved cable data switching unit that provides a fail-over system whereby one line card can protect a plurality of US (upstream) or DS (downstream) channel line cards, providing N+1 protection, with one linecard being able to protect N number of working linecards. When a failure is detected in a working linecard, the signals being routed by the failing linecards are re-routed seamlessly to a protect linecard. This disclosure provides for data to be passively routed, providing for data flow even if power is lost.

Method and apparatus for N+1 RF switch with passive working path and active protection path

A system and method for splitting and combining signal in a Cable Modem Terminal Station (CMTS). This system uses a hierarchal approach to connect RF modules to PHY modules. A first splitter and combiner connects each N input in a module to each of N outputs. Each of Nth output is then connected to a Nth second splitter/combiner which in turn connects each input to each output.

System for combining and splitting signal in a cable modem terminal system

Growing community of inventors

Santa Clara, CA, United States of America

Nicos Achilleoudis