摘要： 自从20世纪80年代报道了第一次拥塞崩溃以来,TCP拥塞控制策略在不断地进行 完善和改进,通过快速重传和快速恢复等机制使它能很好地对网络拥塞做出及时的响应?但 是随着网络技术的发展,音频和视频等多媒体业务(如IP Phone?视频会议)在网上的应用越 来越多,而这些应用采用的一般都是不提供拥塞控制的协议(如UDP),因此如何对这些业 务流进行拥塞控制,使它们能与TCP流一起公平地共享网络带宽,满足TCP-friendly要求变 得越来越重要?该文先对TCP拥塞控制进行讨论,然后对TCP-friendly拥塞控制策略和以后 的研究方向进行了讨论?

关键词: TCP, 快速重传, TCP-friendly

Abstract: Since 1980 when the first congestion collapse is reported TCP, conge stion control scheme has been improving. By adding the fast retransmit and fast recovery the improved TCP congestion control scheme can avoid congestion collap se effectively. With the rapid development of Internet, more and more real-time multimedia services such as IP phone and Vo D are constituting the major share of Internet traffic. Because these traffics usually do not employ TCP how to a djust these flows, make them meet the characters of TCP-friendly and share the b andwidth with the TCP flows is becoming more and more important. In this paper TCP congestion control policy is discussed firstly, then analyzes several TCP-fr iendly congestion control schemes and affords the future of the research on TCP- friendly congestion control mechanism.

中图分类号: 

• TP393.02