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A handoff packet marker for diffserv in mobile IP-based networks with packet buffering

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4 Author(s)
Seung Beom Lee ; Dept. of Electron. Eng., Korea Univ., Seoul, South Korea ; Kyeong Hur ; Jong-Kook Kim ; Doo-Seop Eom

Performance of TCP can be severely degraded in mobile IP-based wireless networks where packet losses not related to network congestion occur frequently during inter-subnetwork handoffs by user mobility. To solve such a problem in the networks using Mobile IP, the packet buffering method at a base station recovers those packets dropped during handoff by forwarding the buffered packets at the old base station to the mobile users. But, when the mobile user moves to a congested base station in a new foreign subnetwork, those buffered packets forwarded by the old base station are dropped and TCP transmission performance of a mobile user degrades severely. In this paper, a PBM (packet buffering marker) at a base station is proposed to prevent burst losses of out-of-profile packets during handoffs for DiffServ Assured Services. From simulation results, it is shown that PBM scheme improves TCP throughputs of an Assured Service flow during handoffs.

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:55 ,  Issue: 2 )

Date of Publication:

May 2009

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