基于CATV网MPEG-2TS复用器包调度算法

Package scheduling algorithm for MPEG-2TS multiplexer based on CATV network

研究用于CATV网MPEG-2TS复用器的包调度算法。提出了调度矩阵的概念,分别描述了传统的恒定速率(CBR)调度算法和本文所提出的可变速率(VBR)调度算法。VBR调度算法采用基于输入流统计特性的实时带宽分配策略,可获得较好的延时性能和较高的信道利用率。

In this paper,we study the scheduling algorithm for multiplexers in CATV networks.we proposed a concept of scheduling matrix.And then two kinds of scheduling algorithms are given which are described with the scheduling matrix.Especially,we focus on the VBR scheduling algorithm that can achieve better display of MPEG-2program in the CATV networks.The scheduler applying our VBR scheduling algorithm maintains,for each input stream,a counter to determine how many TS packets should be transmitted in the current scheduling cycle(one frame period)in order to prevent deadline violation.The real-time bit rate of each input stream is used to up-date the parameters of the scheduling matrix.