Congestion control for bursty video traffic in ATM networks

Abstract

Abstract In an ATM network, congestion controls as well as traffic controls, e.g., call admission control and policing control, are important to efficiently transmit multimedia traffic while satisfying their different required grade‐of‐services. This paper analyzes a congestion control scheme required for ATM networks. With the control scheme, when the buffer queue length in an ATM switch exceeds a certain threshold, congestion control is applied and. cells from lower priority traffic such as voice are rejected. As a result, higher‐priority traffic such as compressed video can be transferred with good quality. Cell loss probabilities are analyzed for each multimedia traffic at a switching machine buffer and the effectiveness of the congestion control is studied. By numerical examples it is shown that the threshold value to apply the congestion control is an important parameter for effectively transferring multimedia traffic.