一种改进的TCP拥塞控制算法  

Improved algorithm for TCP congestion control

作　　者：杨晓萍[1] 史帅[1] 陈虹[1] 

机构地区：[1]吉林大学通信工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2006年第3期433-437,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金资助项目(60234030);'863'国家高技术研究发展计划项目(2003AA412210)

摘　　要：传统的TCP拥塞控制算法在遇到丢包时发送速率会有剧烈抖动,不适合传输实时多媒体数据流。本文在TCP拥塞控制算法加增乘减(AIMD)基础上提出一种改进算法慢增慢减(SISD)算法。仿真结果表明:该算法同传统TCP拥塞控制算法相比,有较好的发送速率平滑性,减小了数据延时抖动,加入了多媒体流的拥塞调整机制。本算法可作为实时多媒体数据传输研究的基础,同时也改善了TCP流的传输质量。The traditional TCP congestion control algorithm is unsuitable for the multimedia traffics because of the fact that when a packet is discarded, the sender halves its rate, resulting in sending rate wobbling greatly. An enhanced congestion control algorithm, slow increase slow decrease （ SISD）, was propored based on the algorithm additive increase multiplicative decrease（AIMD）. The simulation results show that SISD algorithm has better smoothness of sending rate compared with the congestion control algorithm of TCP, which reduces the fluctuation of sending data and adds the congestion control to multimedia traffics. This algorithm can act as development basis of real-time multimedia traffics, and improve the transmission quality of TCP traffics.

关 键 词：通信技术 TCP拥塞控制 加增乘减(AIMD) 慢增慢减(SISD) 服务质量(QoS) 

分 类 号：TN915[电子电信—通信与信息系统]