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本文分析一个话音/数据综合数字用户环路。为有效利用现有环路,话音与数据均采用分组交换。用二维马尔可夫链来模型环路排队过程,用生成函数法来分析评价其性能。文中研究了典型的2B+D环路,因它是基本用户接入到ISDN的标准。文中考虑了话音与数据在分开信道和同一信道中传输时的排队性能。数值计算结果表明,综合方案可明显地增加数据业务。
This article analyzes a voice / data integrated digital subscriber loop. In order to effectively use the existing loop, voice and data are packet switched. The two-dimensional Markov chain is used to model the loop process and the generated function method is used to analyze and evaluate its performance. In this paper, a typical 2B + D loop is studied because it is the standard for basic user access to ISDN. The paper considers the queuing performance when voice and data are transmitted in separate channels and in the same channel. The numerical results show that the comprehensive solution can obviously increase the data service.