一种新的等效带宽估计方法

网络技术和图像语音处理技术的发展促进了多媒体通信技术的发展，随着分级交换网中多媒体通信研究的深入，多媒体流的适时性问题得到了特别的关注，在实时多媒体应用中，同包丢失率一样，时延也是一个重要的性能指标，在综合考虑多媒体业务的统计特性以及包丢失率和时延等QoS参数影响的基础上，给出了一个计算简单且便于实时带宽估计和管理的多媒体业务等效带宽的近似表达式，并讨论了相关参数对等效带宽的影响。

A NOVEL EQUIVALENT BANDWIDTH ESTIMATION METHOD

The multimedia communication technology has been improved dramatically with the improvement of networking technology as well as audio/video processing technology. The real time property of multimedia applications has attracted a lot of attention. Future integrated services networks will have to support applications with both diverse traffic characteristic and diverse performance requirements. The real time multimedia application, which is delay sensitive, faces the challenge of satisfying quality of service constraints. The delay is an important performance metric as well as packets loss probability(PLP), and the bandwidth estimation has become an important metric in call admission control (CAC) and congestion control (CC). In this paper, based on their statistical characteristics and with the PLP and the delay considered, a computationally simple approximation expression for the equivalent bandwidth of the multimedia applications, is proposed for real time bandwidth estimation and management. The impacts of some relevant parameters are investigated.