机构地区: 北京邮电大学
出 处: 《现代电信科技》 2002年第10期1-5,共5页
摘 要: 首先介绍蜂窝电话系统的发展,包括GSM,CDMA,TDMA和PDC等4种第二代系统,以及通用移动电信系统(UMTS)和cdma2000两种第三代技术。接着讨论GSM/GPRS、UMTS版本3、全IP、cdma2000和无缝的网络结构,详细分析了移动网络从电路交换到分组交换,然后向全IP网络结构演进,最后实现不同接入技术之间互联的必然趋势。 The development of cellular mobile phone system is firstly intro-duced in this paper,including four kinds of 2G systems:GSM,CDMA,TDMA and PDC,as well as two kinds of 3G technologies,namely UMTS and cdma2000.Then,GSM /GPRS,UMTS version3,all-IP,cdma2000and seamless network archi tectures are discussed.The developing trend of mo -bile networks from circuit switching to packet switching,and fur ther to all-IP network architecture and the realization of internetworking between different access technologies are discussed.