“TCP-friendly”的多媒体流分层传输QoS控制策略  

TCP-friendly QoS control policies for layered transmission of multimedia stream

作　　者：郑枫[1] 毛迪林[1] 高传善[1] 

机构地区：[1]复旦大学计算机科学系,上海200433

出　　处：《通信学报》2001年第10期14-20,共7页Journal on Communications

基　　金：西安电子科技大学综合业务网国家重点实验室开放课题基金资助项目

摘　　要：针对目前Ｉｎｔｅｒｎｅｔ上多媒体流分层传输的ＱｏＳ控制方案的不足，提出了一种基于接收者的ＴＣＰ－ｆｒｉｅｎｄｌｙ的ＱｏＳ控制策略，它利用ＴＣＰ吞吐量模型和“加强”了的ＲＴＣＰ协议，使接收者能灵活地计算并选择适合其自身能力的媒体传输质量。所设计的区分服务（ＤｉｆｆＳｅｒｖ）体系结构下的ＥＲＩＯ机制为多媒体流的不同层次提供不同的转发质量，文中详细讨论了它的实现过程，并给出了计算机模拟测试结果。Due to shortcomings of current QoS control solutions of layered transmission of multimedia stream over the Internet a receiver-based TCP-friendly QoS control policy is proposed in this paper. By using TCP throughput model and enhanced RTCP protocol, the policy enables receivers to calculate and choose an appropriate media quality flexibly based on their own receiving capacity. This paper explains also a differentiated service mecha- nism named ERIO (enhanced RIO) to provide corresponding differentiated QoS for the different layers. In addition, realization mechanism is discussed in detail, and computer simulation results are summarized.

关 键 词：服务质量 多媒体流 分层传输 实时传输协议/实时控制协议 因特网 

分 类 号：TN915.04[电子电信—通信与信息系统]