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移动Internet是目前学术界研究的热点问题之一,SIP是IETF提出的IP电话信令协议。结合移动Internet技术介绍了一些扩展SIP以提供移动性支持的机制,主要讨论注册、定位和切换等方面的问题。
Mobile Internet is one of the hot issues in academic research at present. SIP is the IP phone signaling protocol proposed by IETF. Some mechanisms for extending SIP to provide mobility support are introduced in conjunction with mobile Internet technology, mainly discussing registration, location and handover issues.