Robust techniques for optimal upstream communication between cable modem subscribers and a headend

US7139283B2 · kind B2 · utility

Assignee

• Broadcom Corporation · US

Inventors

• Thomas J. Quigley · Wake Forest, US
• Jonathan S. Min · Buena Park, US
• Lisa V. Denney · Suwanee, US
• Henry Samueli · San Juan Capistrano, US
• Sean F. Nazareth · Irvine, US
• Feng Chen · Feucht, DE
• Fang Lu · Walnut, US
• Christopher R. Jones · Santa Monica, US

Key dates

• Filing date: Feb 9, 2001
• Grant date: Nov 21, 2006
• Expiry date: Jun 2, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02D30/50
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A number of features for enhancing the performance of a cable transmission system in which data is transmitted between a cable modem termination system at a headend and a plurality of cable modems located different distances from the headend. The power transmission level, slot timing, and equalization of the cable modems are set by a ranging process. Data is transmitted by the modems in fragmented form. Various measures are taken to make transmission from the cable modems robust. The upstream data transmission is controlled to permit multiple access from the cable modems.