摘要： 建立一个马尔科夫链（Markovchain）模型，以分析ATM适配层类型2（AAL2）规程的信元打包过程。证实信元中话音的打包密度及链路使用效率很大程度上取决于Timer_CU的值。还给出了为达到预计的链路效率计算Timer_CU值的算法，并联系上海地铁的具体情况给出仿真结果。

关键词: ATM网络, AAL2, 时延, 排队系统

Abstract: In this paper,we establish a Markov chain model to analyze the AAL2 packing process.We find that the packing density and linkefficiency depend significantly on the TimeTCU value.The analysis of this paper gives an alg0rithm to calculate a reference TimerCU valueto achieve desired link efficiency.Shoulation results related with situation 0f Shanghai Metro that verify the analysis are also presented.

中图分类号: 

• TN916.2