| 摘要 |
<p>PURPOSE:To dynamically distribute a cell transfer delay time to each exchange in a network by changing a value of a specific field of a cell in accordance with queue length in a waiting buffer at the arrival time point. CONSTITUTION:A cell is decided as to whether a tag is imparted or not by a tag detecting part 120 before it is written in a waiting buffer 110, and whether the tag is imparted to the cell or not is informed to a buffer write control part 140 through a tag signal 180. In accordance with whether the tag is imparted to the cell or not and whether queue length exceeds a first threshold 111, a second threshold 112 and a third threshold 113 or not, the control part 140 determines a processing of the cell. That is, in the case its length is smaller than the threshold 111, and also, lager than the threshold 112, certain value is added to a specific field of the cell, and in the case its length is smaller than the threshold 113, a certain value is subtracted from the specific field of the cell, and in the case its length is larger than the threshold 111, or a value of the added or subtracted field exceeds a certain value, the cell is abandoned.</p> |
