Upstream signal quality monitoring

Details Upstream signal quality monitoring Upstream signal quality monitoring

2011-05-17

2011-05-17

Ton, Dang T (Department: 2475)

Multiplex communications

Diagnostic testing

Determination of communication parameters

C370S480000, C370S332000

Reexamination Certificate

active

07944848

ABSTRACT:
The problem is that a measurement of the average signal quality (average modulation error ratio), does not identify poor quality signals that may be originating from an individual cable modem. The device of the present invention displays the modulation error ratio (MER) for each packet received. Since the media access control (MAC) address is associated with a packet received from an individual cable modem, a graph displaying the MER for each packet received is also displaying the MER for signals from the individual cable modems. Thus a technician viewing the display will be able to identify whether a low MER is a result of an impairment in the network or the from an individual cable modem.

REFERENCES:
patent: 2005/0047442 (2005-03-01), Volpe et al.
patent: 2006/0230423 (2006-10-01), Burgett et al.
patent: 2008/0200129 (2008-08-01), Cooper et al.
patent: 2008/0242225 (2008-10-01), Krishnamoorthi et al.

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