| Summary: | 碩士 === 亞洲大學 === 電腦與通訊學系碩士班 === 95 === Third generation(3G) personal wireless communication networks,provide wide range but low data rate services, while the wireless local area networks(WLAN) provide limited range but high data rate services. Thus, 3G and WLAN are complementary in the services their provide. As a consequence of progress in technology, a common goal of the telecommunication industry is to provide service for mobile users to roam among heterogeneous networks. As far as the roaming service is concerned, how to reduce the handover latency is a big challenge.
Moreover, when the mobile nodes are fast moving, the care-of address is frequently changed. As a result, the foreign agents in the mobile IPv6 networks can not forward the packets to the care-of-address of the mobile nodes currently used. In turn, communications interrupt may occur. This these studies the problems of the mobile nodes in wireless mobile IPv6 networks switching among WLAN and 3G heterogeneous networks. We propose a mobility management mechanism to reduce the handover latency and the probability of communication interruption due to incorrect care-of address
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