期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2015
卷号：4
期号：1
页码：9825-9830
出版社：IJECS
摘要：This paper reviews the private next generation networks (NGN) , billing and charging system and clarify the billing and charging system and compared with traditional telecommunications billing system. The paper also contains the NGN billing and charging system mathematical model so as to understand the NGN billing process
