| Summary: | 碩士 === 國立交通大學 === 資訊科學與工程研究所 === 94 === With rapid development of widespread multi-function mobile devices and a variety of real-time services, seamless terminal mobility support becomes the most significant requirement in mobility management. Based on Session Initiation Protocol (SIP) over Wireless LAN, there exist two critical issues from the perspective of interdomain handoff, including packet loss and call failure, greatly diminishing the quality of service. These issues arise from Mid-Call Mobility Problem, Home Registrar Failure Restoration Problem, and Pre-Call Mobility Problem, respectively. In this article, we propose a systematic mobility scheme, “STAMP”, to achieve not only fast handoff but also smooth handoff, by means of extracted knowledge from mobile user behavior mining. The moving pattern here is endowed with the nature of IP network as an assistant to forward packets timely to the right place. Through 4 phases composed of 7 modules, each of the three problems is solved adaptively via an exclusive path in “STAMP” with effective and efficient sequential pattern mining processes. Above all, we enhance the quality of real-time SIP services. We also analytically compare the delay and disruption time for signaling associated with Shadow Registration and our solution.
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