A Proportional Feedback Scheme for ATM Networks

Abstract

Available Bit Rate (ABR) service class is proposed by ATM Forum to provide the “best-effort” service like traditional TCP/IP traffic. It is designed to make use of the remaining bandwidth not used by VBR and CBR. However, the bursty nature of ABR traffic makes it difficult to prevent buffers on ATM switches form overflowing. A number of schemes have been proposed for ABR traffic control. In this thesis, a proportional scheme which is rate-based hop-by-hop flow control scheme. It is shown the scheme can utilize full bandwidth without any cell loss. It is also shown the scheme has low queuing delay and fast transient response.