RTCP反馈和缓冲区的传输控制算法研究  

Research on transmission control algorithm based on RTCP feedback and buffer policy

作　　者：刘国柱[1] 王洪林[1] 

机构地区：[1]青岛科技大学信息科学与技术学院,山东青岛266061

出　　处：《计算机工程与设计》2010年第12期2704-2706,2725,共4页Computer Engineering and Design

基　　金：山东省高等学校科技计划基金项目(J08LJ21)

摘　　要：为了保证流媒体数据的实时稳定传输,借鉴了和式增加积式减少(AMID)算法,并且结合了接收端缓冲区读取和写入数据速率,利用接收端RTCP的反馈信息提出了一种新的RTP流媒体传输的控制算法——基于缓冲区的和式增加积式减少控制算法(bufferbased-additive increase multiplicative decrease,BB-AIMD)。该算法通过反馈接收方的缓冲区信息,调整了发送方发送速率的增加幅度和减少幅度。使用NS2软件的模拟结果表明,该算法降低了流媒体传输过程中的丢包率,同时也提高了流媒体实时回放的顺畅性。For the purpose of ensuring the stability of real-time data transmission,a new RTP-based streaming media transmission control algorithm called BB-AIMD（buffer based-additive increase multiplicative decrease） is put forward.The algorithm is based on AIMD（additive increase multiplicative decrease） algorithm,and combine the rate of reading and writing of the receiver buffer,and utilize the feedback of RTCP sending by the receiver.This algorithm adjusts the increase and decrease value of the sending rate by feeding back the information of the receiver buffer.It is simulated by NS2,and prove that it can reduce the packet loss rate during streaming media trans-mission,as well as make the real-time playback more smoothly.

关 键 词：流媒体 RTCP 缓冲区调整策略 AIMD算法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]