Method and apparatus for detection and classification of...

Details Method and apparatus for detection and classification of... Method and apparatus for detection and classification of...

2006-04-04

2006-04-04

Nguyen, Lee (Department: 2682)

Interactive video distribution systems

Video distribution system with upstream communication

Remote testing of cable system

C455S423000

Reexamination Certificate

active

07024680

ABSTRACT:
A method and apparatus for detecting and classifying RF impairments on the upstream path of a communication system is provided. The detection system detects frequencies with common path distortion impairments, and a system manager avoids transmission over those frequencies or adapts transmissions accordingly. Subsequently, periodic impairments on the upstream path are detected. Detection of periodic impairments triggers the system manager to schedule no traffic during impairment periods, schedule low priority traffic during impairment periods, and/or adjust the physical layer parameters of traffic transmitted during an impairment period in order to increase robustness only when necessary. Finally, non-periodic or random impairments are detected on the upstream path and global parameter changes are made to adapt to non-predictable impairments. Each of the impairment types is then further classified to assist an operator of the system in determining the physical source of the impairment.

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Ederling et al., “CATV Return Path Characterization for Reliable Communications”,IEEE Communications Magazine, vol. 33, No. 8, dated Aug., 1995, pp. 62-69.
Copy of International Search Report issued Sep. 26, 2002 for International Appln. No. PCT/US01/43103, 7 Pages.

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