Fair and Reliable Hop-by-Hop Flow Control with Efficient Buffer Allocation

• Main Authors: Shiu, Duan-ruei, 徐端瑞
• Other Authors: Lai, Wei-kuang
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/89993626625768141327

碩士 === 國立中山大學 === 資訊工程研究所 === 84 === Asynchronous Transfer Mode (ATM) can support both circuit switching and packet switching. Due to the advance of multiplexing technology and switching technology, different traffic sources with different Quality of Service(QoS) requirements can be transmitted in a network. However, without adequete flow control mechanisms, congestion could happen. This will reduce total network throughputs and increase data loss rates. Among all service types, ABR (available Bit Rate) is used primarly for transferring data files. Data files are sensitive to loss and thus flow control is required. In this paper, we adopt a hop-by-hop credit-based flow control scheme to satisfy the characteristics of ABR traffics. In order to efficiently utilize buffer spaces, receiver-oriented adaptive buffer allocation is considered in our scheme. Besides, we introduce the concept of request cell to let senders request credits needed from receivers. Results show zero cell loss, high bandwidth utilization, reliable transfer, and fair sharing of available bandwidth are achived.