Internet的高速新信道──CATV数字网络

RESEARCH ON QOS PARAMETERS IN TRANSPORT LAYER

文中讨论了我们在基于ＣＡＴＶ网络上实现Ｉｎｔｅｒｎｅｔ互连课题中的部分研究成果．简要地描述了ＣＡＴＶ与电信网在实现Ｉｎｔｅｒｎｅｔ上的优劣比较；详细地分析了在ＣＡＴＶ介质上运行ＴＣＰ／ＩＰ协议的必要条件；给出了ＣＡＴＶ介质的低层协议；在此基础上较详细地讨论实现ＣａｂｌｅＭＯＤＥＭ的关键技术．最后给出了一个实现实例和结论．

QOS parameter definitions are the basis for furthering QOS control. But QOS parameters defined by ISO and ITU are incoherent and incompatible, which leads to the inefficiency of QOS control. In terms of the characteristics of multimedia real time applications, the minimum QOS parameter set in transport layer is proposed and defined for the first time. It is demonstrated that QOS parameters defined by ISO and ITU can be represented by parameters or a combination of parameters of the set. It is also shown that the set is open and manageable and can be the potential unified basis for QOS parameters.