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The Research of Mobile IPv6 Handover Technology

Author: LiuXiWei
Tutor: DaiHong
School: Liaoning University of Science and Technology
Course: Computer Software and Theory
Keywords: Mobile IPv6 DAD FHMIPv6 MLD PIM NS-2
CLC: TP393.04
Type: Master's thesis
Year: 2012
Downloads: 77
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Abstract


In order to achieve the mobile hosts to access the Internet anytime and anywhere, Internet Engineering Task Force (IETF) is proposed for the next generation mobile Internet Protocol -- Mobile IPv6 protocol. In mobile IPv6, when the mobile nodes handover between networks,resulting in a large number of messages interaction, cause by excessive handover delay、the communication interrupt temporarily,the packets loss, degradation of communication quality.According to the standard mobile IPv6 handover technical defects, IETF presents fast switching technology ( FMIPv6 ), hierarchical switching technology ( HMIPv6 ) and fast hierarchical switching technology ( FHMIPv6 ).FHMIPv6 was the combination of fast switching technology and hierarchical switching technology, make move into macro-mobility and micro-mobility,and use fast switching technology in macro moving. The analysis revealed that, more than 90% handofver delay was causing by the link care-of address and regional care-of address’s duplicate address detection ( DAD ).Therefore, this paper presents a duplicate address detection scheme based on multicast Listener Discovery Protocol ( MLD ) and Protocol Independent Multicast ( PIM ).The MLD protocol manages temporary members in the multicast group and the PIM-SM protocol manages the routers information. During switching, it will bulid a multicast group communication by the mobile node, communication node, the new access router and the old access router before the standard of switching operation.This paper studied carefuly about the mobile IPv6 principle and the multicast technology, make a detailed analysis of mobile IPv6 and packets loss. The NS-2 simulation results show that, the handover latency of this scheme was reduced by 80%, and effectively reduces the packets loss, which greatly improving the mobile IPv6 handover performance.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Communication protocols, communication protocols
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