基于VBR多媒体流资源管理的研究

在分布式多媒体系统中，连续媒体流采用压缩方式传输，以减小最昂贵资源网络带宽的使用．但是压缩媒体流是变化位速度（ＶＢＲ），在网络传输中产生突发情况，给网络资源管理带来了挑战．本文在基于未压缩本流节资源管理方案基础上，提出ＶＢＲ节概念，把变化尺寸的突发的媒体帧拆分成网络发送包，采用周期性调度，平滑突发帧的传输，给出了ＶＢＲ节在保证流ＱｏＳ基础上，ＣＰＵ周期、带宽和缓冲区资源的分配公式，显示出通过调整调

RESEARCH OF RESOURCE MANAGEMENT FOR VBR MULTIMEDIA STREAMS

The continuous media stream is usually transmitted with compression in order to reduce networks bandwidth, the much expensive resource, in distributed multimedia systems. But compressed media stream is VBR stream that generates brush in transmission, which the challenge is given to resource management in networks. The definition of VBR session is presented that segments brush media frame into packets of networks based on session non compression media stream in this paper. The packets are scheduled by periodic algorithm to smooth the brush frame. It addresses equations of allocating CPU period, bandwidth and buffer space resource to guarantee QoS. It shows that the network bandwidth is obviously saved by adjusting the number of packets scheduled and increasing appropriate buffer spaces and an experiment is done.