高技术通讯2011，Vol.21Issue(10)：997-1002,6.DOI:10.3772/j.issn.1002-0470.2011.10.001
基于TCP的实时流媒体传输性能分析
On the performance of real-time multimedia streaming transmission using TCP
摘要
Abstract
In view of the trend that the transmission control protocol (TCP) is increasingly used instead of the user datagram protocol (UDP) for multimedia information transmission in the next generation networks, this paper studies the performance of the real-time multimedia stream transmitting over TCP. Based on the overall consideration of the characteristics of TCP including fast retransmission, fast recovery and changing regularity of the congestion window, the impacts of TCP buffer on the playback quality are analyzed from a micro perspective. Based on a further study made on the process of assembling audio frames and disassembling video frames, the conclusion that it is unfeasible to transmit real-time audio on the Internet using TCP is proved. Also, it is presented that to transmit real-time video via TCP with the acceptable playing performance, the sending-delay of a video frame should be less than the difference between the play buffer delay and half of the round trip time (RTT). The conclusions are evaluated to be significant and referable for developing the streaming media delivery technology through the extensive simulations using the Ns2 simulator.关键词
TCP协议/UDP协议/实时流媒体/传输/性能分析Key words
transmission control protocol (TCP) / user datagram protocol (UDP)/ real-time multimedia streaming/ transmission/ performance study引用本文复制引用
熊永华,吴敏,贾维嘉..基于TCP的实时流媒体传输性能分析[J].高技术通讯,2011,21(10):997-1002,6.基金项目
国家杰出青年科学基金(60425310),香港城市大学战略发展计划(7002214)和中南大学自由探索计划(201012200196)资助项目. （60425310）
