VoIP业务移动切换技术研究

Research on Mobile Handoff Technology for VoIP Service

随着IP网络技术和无线接入技术的迅速发展,移动环境下的VoIP业务正愈益受到人们的重视,其中关键技术就是VoIP的移动切换。目前有2大类移动切换技术,应用层的SIP信令技术和网络层的移动IP(MIP)技术。首先介绍了移动IPv4和移动IPv6,建立了分级移动IPv6的模型;然后介绍了SIP如何进行移动性管理;接着建立了1个比较模型,对2种移动管理技术的切换性能进行了定量的分析,得出2种技术的优缺点。

With the rapid development of IP networks and wireless access technologies,IP services in the mobile scenarios are increasingly attracting the people＇s attention.One of the key technologies is the mobile handoff of IP terminals.There are two types of mobile handoff technologies.One is based on SIP,which is an application layer protocol.The other is based on Mobile IP（MIP） technology,which is a network layer protocol.The performance of these two technologies is different because they gelong to different layer.The thesis first gives an introduction to mobile IPv4,mobile IPv6 and Hierarchical Mobile IPv6.Then it describes that how SIP can support the function of mobility management.Following the establishment of a comparison model,a quantitative handoff performance analysis is done of the two mobility management technologies,resulting in their advantages and disadvantages.