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Received:June 19, 2010 Revised:July 15, 2010
Received:June 19, 2010 Revised:July 15, 2010
中文摘要: 分析了目前在实时业务中常用的拥塞控制机制TFRC。针对实时流媒体要求低延迟和低抖动的特点，提出将单程传输延迟的抖动作为反馈信号来调节发送端的发送速率，并针对抖动阈值的选定采用了自适应的调节方法。仿真结果表明改进后的算法减小了延迟抖动，提高了相关的服务质量。
Abstract:The congestion control mechanism TFRC, which is widely used in current real-time streaming media, is analyzed in this paper. A proposal aiming at the requirement for short delay and jitter of real-time streaming media has been made to adjust to the transmit rate of the sender to the change of single trip delay jitter. Meanwhile, a dynamic adaptive method is used in the determination of the jitter threshold. The result of simulation indicates that with the improved algorithm the jitters has been reduced remarkably and other related QoS has also been improved.
keywords: congestion control TCP friendly real-time stream
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基金项目:安徽科技学院引进人才基金(ZRC2010255);安徽自然科学基金(KJ2009B121Z)
引用文本：
王传安,葛华,赵海燕.TFRC 拥塞控制策略的研究和改进.计算机系统应用,2011,20(3):70-73
WANG Chuan-An,GE Hua,ZHAO Hai-Yan.Research and Improvement of TFRC Congestion Control Mechanism.COMPUTER SYSTEMS APPLICATIONS,2011,20(3):70-73
王传安,葛华,赵海燕.TFRC 拥塞控制策略的研究和改进.计算机系统应用,2011,20(3):70-73
WANG Chuan-An,GE Hua,ZHAO Hai-Yan.Research and Improvement of TFRC Congestion Control Mechanism.COMPUTER SYSTEMS APPLICATIONS,2011,20(3):70-73
