Performance analysis of traffic control methods in multimedia ATM LAN

摘要

The authors treat traffic control methods suitable to ATM LAN, in which two service classes are considered; one is for high speed data transfer based on a fast reservation protocol (FRP service class) and the other is for continuous bit rate (CBR) traffic such as motion video (CBR service class). The authors first evaluate the performance of the FRP service class. When the terminal requests the data transfer, its usable bandwidth is negotiated with the traffic descriptor (C/sub max/, C/sub min/) The former is a desirable data transfer rate, and the latter is a sustainable rate when the network is congested. By carrying out a mathematical analysis, the authors show an appropriate set of the traffic descriptor. The coexistence of FRP and CBR service classes are then treated. By using an analytic method, the performance of the CBR service class traffic is shown to be heavily affected by the FRP service class traffic. Therefore, the authors introduce a reserved bandwidth to the CBR service class to guarantee some appropriate level of performance to the CBR service class.