一种基于PGM的单速率组播拥塞控制方案-软件学报.pdfVIP

1000-9825/2004/15(10)1538 ©2004 Journal of Software 软 件 学 报 Vol.15, No.10 ∗ 一种基于 PGM 的单速率组播拥塞控制方案 + 谭连生 , 熊乃学, 杨 燕 (华中师范大学 计算机科学系,湖北 武汉 430079) A PGM-Based Single-Rate Multicast Congestion Control Scheme + TAN Lian-Sheng , XIONG Nai-Xue, YANG Yan (Department of Computer Science, Central China Normal University, Wuhan 430079, China) + Corresponding author: Phn: +86-27 E-mail: L.tan@, Received 2003-08-29; Accepted 2003-11-07 Tan LS, Xiong NX, Yang Y. A PGM-Based single-rate multicast congestion control scheme. Journal of Software, 2004,15(10):1538~1546. /1000-9825/15/1538.htm Abstract: PGM (pragmatic general multicast) is a reliable multicast transport protocol, which runs on IP networks. Because PGM standard does not include any congestion control scheme in itself, it can’t achieve real-time response to satisfy the requirements of network and can’t timely adju st the sending rate. Based on the PGM protocol, a novel close-loop controller, which is suggested to be implemented between the sender and the CLR (current limiting receiver), is introduced in this paper to timely adjust the sending rate. The proposed rate control scheme brings the source ’s sending rate of the network to be stable gradually and has fast response. Simulations are carried out for the proposed control scheme, and the simulation results demonstrate that the proposed algorithm has the following properties: scalability, stability, fast convergence, and fast response under various network environments. They show good performance of the proposed multicast control schemes. Key words: buffer occupancy; congestion control; multicast; PGM (pragmatic general multicast); stab