有关在ATM上传送IP的现有规范都把骨干网当作一个巨大的子网络,而不是多个可管理的子网,因此希望采用ATM网络代替IP骨干网的网络管理者遇到了麻烦。Ipsilon网络公司推出的ATM1600IP交换机允许在ATM骨干网上容纳IP子网而不失去企业网的...有关在ATM上传送IP的现有规范都把骨干网当作一个巨大的子网络,而不是多个可管理的子网,因此希望采用ATM网络代替IP骨干网的网络管理者遇到了麻烦。Ipsilon网络公司推出的ATM1600IP交换机允许在ATM骨干网上容纳IP子网而不失去企业网的控制。这一特点是支持ATM Forum的LAN Emulation或IETF的Clas-sical IP over ATM等规范的交换机所不能提供的。1600IP交换机的配置类似一个路由器,因此网络管理者无须了解ATM的技术细节,他们可以象管理路由器一样管理1600IP交换机。 但1600IP交换机也有一些不足之处。展开更多
本文先阐明IP技术与ATM技术结合的必要性,然后概述了路由器的结构和功能,对IP路由选择也作一定的交待。接着介绍了IP OVER ATM技术,包括IP OVER ATM的原理、捷径路由方案等,并对捷径路由方案中的拓朴和业务两种实现方式进行了具体介绍...本文先阐明IP技术与ATM技术结合的必要性,然后概述了路由器的结构和功能,对IP路由选择也作一定的交待。接着介绍了IP OVER ATM技术,包括IP OVER ATM的原理、捷径路由方案等,并对捷径路由方案中的拓朴和业务两种实现方式进行了具体介绍和比较。最后,还对IP OVER ATM技术作了前景分析。展开更多
This paper proposed a two-tier location management mechanism （TTLM） by improving the current registration mechanism （CR） in IP Multimedia Subsystem （IMS）. The TTLM includes the visited network registration and t...This paper proposed a two-tier location management mechanism （TTLM） by improving the current registration mechanism （CR） in IP Multimedia Subsystem （IMS）. The TTLM includes the visited network registration and the home network registration, in which the visited network registration is responsible for re-registration in IMS. When subscriber roams, the location information of home network will be updated by the visited network based on the change of user equipment （UE）＇ s IP address. Thereibre the TTLM can reduce the times of IMS registration signaling. Using the proposed analytical model, the performance of the CR and the proposed TTLM were investigated. After the performance analysis of CR and TTLM by using proposed analytical model, the cost of CR in IMS could significantly be reduced theoretically and also was proven by simulation experiments.展开更多
文摘有关在ATM上传送IP的现有规范都把骨干网当作一个巨大的子网络,而不是多个可管理的子网,因此希望采用ATM网络代替IP骨干网的网络管理者遇到了麻烦。Ipsilon网络公司推出的ATM1600IP交换机允许在ATM骨干网上容纳IP子网而不失去企业网的控制。这一特点是支持ATM Forum的LAN Emulation或IETF的Clas-sical IP over ATM等规范的交换机所不能提供的。1600IP交换机的配置类似一个路由器,因此网络管理者无须了解ATM的技术细节,他们可以象管理路由器一样管理1600IP交换机。 但1600IP交换机也有一些不足之处。
文摘本文先阐明IP技术与ATM技术结合的必要性,然后概述了路由器的结构和功能,对IP路由选择也作一定的交待。接着介绍了IP OVER ATM技术,包括IP OVER ATM的原理、捷径路由方案等,并对捷径路由方案中的拓朴和业务两种实现方式进行了具体介绍和比较。最后,还对IP OVER ATM技术作了前景分析。
基金Supported by National Science Fund for Distinguished Young Scholars (No. 60525110 )National Basic Research Program of China (No.2007CB307100, 2007CB307103)+1 种基金Program for New Century Excellent Talents in University (No. NCET-04-0111 )Development Fund Project for Electronic and Information Industry (Mobile Service and Application System Based on 3G)
文摘This paper proposed a two-tier location management mechanism （TTLM） by improving the current registration mechanism （CR） in IP Multimedia Subsystem （IMS）. The TTLM includes the visited network registration and the home network registration, in which the visited network registration is responsible for re-registration in IMS. When subscriber roams, the location information of home network will be updated by the visited network based on the change of user equipment （UE）＇ s IP address. Thereibre the TTLM can reduce the times of IMS registration signaling. Using the proposed analytical model, the performance of the CR and the proposed TTLM were investigated. After the performance analysis of CR and TTLM by using proposed analytical model, the cost of CR in IMS could significantly be reduced theoretically and also was proven by simulation experiments.
