一种改进的流媒体TFRC拥塞控制算法  

An improved TFRC congestion control algorithm for streaming media

作　　者：赖文君[1] 

机构地区：[1]江西理工大学信息工程学院,江西赣州341000

出　　处：《微型机与应用》2014年第7期51-53,56,共4页Microcomputer & Its Applications

摘　　要：为了解决流媒体传输拥塞控制机制的不足,提出了一种基于链路延迟抖动趋势的TFRC改进算法。对传统的TFRC拥塞控制算法以及链路延迟抖动变化趋势进行了分析,采用对链路拥塞状况进行预测的策略,引入抖动因子来修正TFRC的吞吐量公式,由链路延迟抖动的趋势自适应地调整发送速率。仿真实验结果表明,改进算法在保持TCP友好性的前提下,有效提高了流媒体数据传输的平滑性和稳定性。In order to solve the shortage of congestion control mechanism for the streaming media transmission, this article proposes an improved TFRC algorithm based on link delay jitter trend. The traditional TFRC congestion control algorithm and link delay jitter trend are analyzed, the throughput formula for TFRC is modified by using the strategy of prediction link congestion status and introducing jitter factor, the sending rate is adaptively adjusted by the link delay jitter trend. The simulation experimental results show that the improved algorithm enhances effectively the smoothness and stability of the streaming data transmission under the premise of maintaining TCP-friendly.

关 键 词：拥塞控制 流媒体 TFRC TCP友好性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]