An evaluation of output strategy with separated buffer in ATM switching system (quality service lines)

Since ATM networks support many types of traffic generated by variety of applications, they must be able to guarantee QoS for these types of traffic. QoS control schemes should support the individual service classes that are available through the ATM networks. Since, in general, the quality of a VC is affected by other VCs in the same transmission path and in other service classes, traffic control should support multiple service classes. In this paper, we propose the mechanism for the buffer allocation and the cell scheduling algorithm with Logical separation of a single buffer in the ATM switching system, and analyze the cell loss probability and the delay of each traffic(CBR/VBR/ABR) based on the weighted value and the dynamic cell service scheduling algorithm, The proposed switch system classifies composite traffics incoming to the switch, according to the characteristic of traffic(VC), and then stores them in the logically separated buffers(quality service lines). And the proposed system adopts the round-robin service with weighted value in order to transmit cells in buffers through output pore.