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Network monitoring system for cell delay variation

  • US 5,805,602 A
  • Filed: 10/01/1996
  • Issued: 09/08/1998
  • Est. Priority Date: 09/25/1995
  • Status: Expired due to Term
First Claim
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1. An apparatus for minimizing jitter caused during transmission of a data packet stream, comprising:

  • a time stamp detector detecting time stamp values within said data packet stream, each time stamp value representing an expected arrival time of a corresponding data packet stream segment;

    a timing circuit, responsive to a clock signal, for determining an actual arrival time for each said corresponding data packet stream segment;

    a detecting circuit detecting jitter in each data packet stream segment by executing a correlation of the corresponding expected arrival time and the corresponding actual arrival time with an accumulation of expected and actual arrival times of previously-received data packet stream segments; and

    a data packet stream correction circuit outputting said data packet stream as a corrected data packet stream having time stamp values adjusted in response to said correlation.

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