预测反馈补偿法抑制帧中继网络时延抖动

摘要

Analysed the reasons of delay jitter of satcom frame relay network, and got the conclusion that the framer length of protocol and the change of waiting framer number in the link queue of satellite communication are main reasons for delay jitter of satcom frame relay network. Therefore, this paper rebuilt the model of delay jitter, and proposed a new method to suppress delay jitter of satcom frame relay network based on prediction and compensation. The results of simulation indicated that the method based on prediction and compensation could suppress delay jitter of satcom frame relay network effectively, and different delay jitter required by QoS was got by adapting different prediction parameters.%对卫星通信帧中继网络时延抖动进行了深入的分析和研究，指出帧中继协议采用的可变帧长度以及卫星链路中缓冲区内等待帧个数变化是产生时延抖动的主要原因，并据此建立时延抖动数据模型，提出预测反馈补偿的方法抑制时延抖动．仿真实验结果表明，预测反馈补偿算法可以有效抑制帧中继网络时延抖动，根据QoS要求，可以采用不同的预测模型参数获得满足条件的时延抖动。