| 摘要 |
<p>PURPOSE:To realize the cell traffic monitor simply realized by a small hardware by comparing and discriminating a count of a 2nd counter circuit with a threshold level over a prescribed time. CONSTITUTION:Number of valid cells detected for a just preceding m-cell time, i.e., in a short time is counted in a 1st counter circuit 4. Thus, the count of the 1st counter circuit 4 is fetched in a 2nd counter circuit 41 and accumulated intermittently for the m-cell time each and when the 2nd counter circuit 41 is reset for each M(=mXn)-cell time, that is, for a long time, the count of the 2nd counter circuit 41 is the total sum of valid cells detected for a preceding M(=mXn)-cell time. Then the total sum is compared and discriminated by a threshold level (N) to attain polishing over the M(=mXk)-cell time. Thus, the cell traffic monitor is realized, which is simply realized with a small practical hardware.</p> |
