Performance Enhancement of Mobile IP by Reducing Out-of-Sequence Packets Using Priority Scheduling

Dongwook LEE  Gooyoun HWANG  Changhwan OH  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.8   pp.1442-1446
Publication Date: 2002/08/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Outstanding Papers from APCC 2001)
mobile IP,  handoff,  packet sequence,  

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The handoff of in Mobile IP causes packet sequence disruption during packet forwarding procedure, which may result in degradation of network performance in higher layer protocol. In this paper, we investigate the impact of handoff on out-of-sequence packets in Mobile IP with Route-Optimization extension. To evaluate the handoff procedure, we use the unstable time period (UTP) when the packet sequence could be mis-ordered. The results show that the UTP mainly depends on queuing delay of old Foreign Agent (FA) and link capacity between old FA and new FA. Further, we propose that the priority queuing for the astray packets in the old FA can increase Mobile IP performance during handoff procedure by reducing the UTP.