A framework of flow control in high-speed ATM wide area networks

In this paper, we propose a two-layer framework of flow control in high-speed ATM wide area networks. At the upper layer of the network level, we classify traffic into two categories, delay-sensitive and delay-insensitive. With the advancement of per-VC queueing in ATM switch design, we propose peak-rate allocation and therefore no flow control for delay-sensitive traffic, and hop-by-hop, credit-based flow control for delay-insensitive traffic. At the lower layer of the node level, we introduce a cell scheduling algorithm which has the capability of multiplexing two types of traffic and satisfying diverse delay and loss requirements from the upper layer.