期刊名称：International Journal of Information Technology Convergence and Services (IJITCS)
印刷版ISSN：2231-1939
电子版ISSN：2231-153X
出版年度：2011
卷号：1
期号：1
出版社：AIRCC
摘要：ATM is representative of the connection-oriented resource provisioning class of protocols. The ATM network is expected to provide end-to-end QoS guarantees to connections in the form of bounds on delays, errors and/or losses. Performance management in ATM network depend upon different parameters. ABR flow control is one of the important parameter for performance management. In this paper, we shall focus on the ABR flow control. Available Bit Rate (ABR) service is becoming more and more important in Asynchronous Transfer Mode (ATM) networks because it can be used to fill in the bandwidth slack left by the scheduling traffic. Recently, two flow control scheme for ABR traffic were under active discussion. They are credit-based flow control scheme and rate-based flow control scheme. Credit-based flow control scheme can completely avoid cell loss. However, its main drawback is the per-VC large buffer requirement. On the other hand, rate-based flow control, requires less buffer. Unfortunately, the ratebased schemes are generally slow in response to congestion. Worst still, these schemes are usually unfair. In this paper, a rate-based flow control scheme called the Max- Min scheme is introduced. The scheme can rapidly achieve the max-min fairness allocation and reduce the peak queue lengths of the bottleneck switches. To solve the problem of different source-to-switch separations for different connections, another rate-based scheme, called the Max-Min Scheme with Delay Adjustment, is proposed. With this, the peak queue lengths at the switches are further reduced.
