摘要： 流控制传输协议(SCTP)是基于不可靠的、无连接的分组IP网络上的一种面向消息的、可靠的传输层协议，它更适合在较高的网络带宽环境下的应用。而作为一种部分可靠版本的PRSCTP在带宽受限的网络环境下有更好的性能表现。该文提出一种适合实时流媒体网络应用的方案BMSCTP，它通过带宽估计机制，实现自适应地在SCTP和PRSCTP之间进行切换。出于性能分析和评估的需要，设计了一组仿真实验。实验结果显示，动态网络环境下传输实时流媒体时，在投递率和传输延迟等性能指标方面，BMSCTP要优于SCTP和PRSCTP。

关键词: 流控制传输协议, 带宽管理, 流媒体

Abstract: Stream Control Transmission Protocol(SCTP) is a message-oriented, reliable transport protocol operating on top of a potentially unreliable connectionless packet service such as IP. However, it requires high network bandwidth. As a partially reliable version of SCTP, PRSCTP achieves better performance in limited bandwidth network environments. This paper explores a new strategy Bandwidth Management based SCTP(BMSCTP) which tries to switch between SCTP and PRSCTP adaptively by using a bandwidth estimation mechanism. For performance analysis and evaluation, a series of simulation experiments are designed and conducted in this work. Simulation results demonstrate that the BMSCTP may provide significantly advantageous over the SCTP and PRSCTP for real-time multimedia applications in dynamic network environments, in terms of delivery ratio, end-to-end delay, etc.

Key words: Stream Control Transmission Protocol(SCTP), bandwidth management, streaming media

中图分类号: 

• TP393