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Rate shaping in per-flow output queued routing mechanisms for unspecified bit rate service

  • US 6,377,583 B1
  • Filed: 06/11/1997
  • Issued: 04/23/2002
  • Est. Priority Date: 06/27/1996
  • Status: Expired due to Term
First Claim
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1. A traffic shaper in a packet switched communication system for shaping a plurality of time multiplexed serial flow of packets to corresponding unspecified bit rate network traffic contracts where the traffic contracts defines a peak packet emission rate, the traffic shaper comprising:

  • a work conserving calendar queue for queuing entries for transmission from said packet switched communication system in a work-conserving manner;

    a non-work conserving calendar queue for queuing entries for transmission from said packet switched communication system in a non work-conserving manner; and

    , a scheduler enqueuing packets of the given flow (i) on said work conserving calendar queue when a rate at which the packets are emitted from the traffic shaper is compliant with the unspecified bit rate traffic contract for the given flow, and (ii) on said non-work conserving calendar queue at a rate that is less than or substantially equal to the peak packet emission rate when the rate at which the packets are emitted from the traffic shaper is non-compliant with the unspecified bit rate traffic contract for the given flow.

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