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Traffic shaping device

  • US 6,005,868 A
  • Filed: 09/25/1997
  • Issued: 12/21/1999
  • Est. Priority Date: 09/27/1996
  • Status: Expired due to Term
First Claim
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1. A communication traffic shaping device comprising:

  • a plurality of cell buffers each provided for respective communication traffic signals having different shaping grades of cells arriving at said traffic shaping device according to an ATM transfer system;

    a cell buffer selector means for identifying each of said cells arriving thereat and storing each of said cells in a corresponding one of the plurality of said cell buffers;

    a cell output portion for outputting selected ones of each of said cells stored in the plurality of cell buffers;

    an output time notice counter having a count value incremented every cell period as a minimum period required to send each of said cells from said cell output portion;

    cell output enabling time registration means provided for the respective traffic signals having different shaping grades for sequentially registering output enabling times of said plurality of cell buffers corresponding to the respective traffic signals; and

    cell sending permit means for comparing an output time noticed by said output time notice counter with the output enabling times registered in said cell output enabling time registration means provided for every virtual channel to enable one of said plurality of cell buffers to output the cell stored therein to said cell output portion and permitting enabled ones of said cell buffers to send the cell stored therein to said cell output portion.

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