摘要
通用移动通信系统(UMTS)为移动数据用户提供了较广阔的覆盖范围,而无线局域网(WLAN)能在局部热点地区提供较高的接入带宽。两种网络的显著优势能够相互结合,为处于异构网络覆盖地区的用户提供网间无缝连接。本文总结了目前UMTS-WLAN互联的三种实施方案:移动IP、互联网关和仿真器。在分别介绍三种方案的体系架构、互联机制和切换流程后从互联层次、信令和数据流向、对现有网络的改造、安全认证机制及用户管理方式等不同层面分析三种方案的特点。
UMTS networks provide broad coverage for the packet domain users, whereas the WLAN provides higher bandwidth in restricted hot-spot areas. The distinctive advantages of these two technologies can be combined to provide seamless connectivity when a user moves across heterogeneous networks. 3GPP has already proposed 3GPP-WLAN interworking in release 6. At present time there are two work groups SA1 and SA2 busy with the feasibility study of service requirement and interworking architecture. This paper will conclude three inter-working alternatives: mobile IP, gateway and emulator. After detail analysis of the interworking mechanisms, architectures and streamline handover procedures, performance will be compared among the three alternatives based on interworking hierarchy, signal and data transmission, the influence of the network, security and management of users.
出处
《电信科学》
北大核心
2004年第8期48-52,共5页
Telecommunications Science
