PRIORITY CONTROL METHOD FOR CONTROLLING CELL SERVICE RATIO ACCORDING TO CELL OCCUPANCY STATUS IN ATM SWITCHING SYSTEM

摘要

The present invention relates to a priority control method for controlling a cell service rate based on a cell occupancy state in an ATM switching system. In the ATM network, a partial shared buffer control method, which is relatively simple to process and implement, is widely used. When low real-time traffic grows, network resources can be wasted, and both the MLT (MLT) control method and the Queue Length Threshold (QLT) control method of the combined priority control method are both real-time traffic and non-real-time traffic. Since each buffer is allocated for the priorities, the priority processing method is complex and the buffer utilization efficiency is reduced. Accordingly, the present invention provides two types of priority control schemes for controlling a cell service rate according to a method of placing a threshold for monitoring a cell occupancy state effectively. In the first priority control method, the monitoring threshold is placed on the class 1 cell side of the buffer to control the priority according to the occupied state of the class 1 cell. The second method is placed on the class 2 cell side of the buffer to control the occupancy state of the class 2 cell. According to the priority control method. As such, two types of cells having different quality of service characteristics in one buffer are accommodated in one buffer, thereby increasing the effectiveness of the buffer, and effectively controlling the quality of service characteristics of the cells by controlling the cell service rate according to the cell occupancy state in the buffer. Can be improved.