Adaptive clock recovery for circuit emulation service

  • US 6,721,328 B1
  • Filed: 11/19/1999
  • Issued: 04/13/2004
  • Est. Priority Date: 11/19/1999
  • Status: Expired due to Term
First Claim
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1. A method for clock recovery in a packet network, the method comprising:

  • receiving data packets at a destination node;

    storing data from the data packets in a buffer;

    reading tile data packets out of the buffer using a locally generated clock;

    monitoring a fill level of the buffer over a first period of time;

    identifying a relative maximum fill level for the buffer during the first period of time, wherein identifying a relative maximum fill level comprises comparing read and write address for the buffer and updating a register for a period of time when a buffer fill level, based on the difference between the read and write addresses is larger than a value previously stored in the register; and

    using the relative maximum fill level to control a frequency of the locally generated clock so as to control the rate at which data is read out of the buffer.

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