A smooth handoff scheme using IEEE802.11 triggers: design and implementation

Authors:
Peter De Cleyn;Nik Van den Wijngaert;Llorenç Cerdá;Chris Blondia
Affiliations:
Department of Mathematics and Computer Science, University of Antwerp, Middelheimlaan 1, B-2020 Antwerp, Belgium;Department of Mathematics and Computer Science, University of Antwerp, Middelheimlaan 1, B-2020 Antwerp, Belgium;Department of Computer Architecture, Technical University of Catalonia (UPC), C/Jordi Girona 1-3, 08034 Barcelona, Spain;Department of Mathematics and Computer Science, University of Antwerp, Middelheimlaan 1, B-2020 Antwerp, Belgium
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking - Special issue: In memroy of Olga Casals
Year:
2004

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A L2 transmission feedback based buffering scheme for mobile IP handovers in an IEEE 802.11 wireless network

TELE-INFO'06 Proceedings of the 5th WSEAS international conference on Telecommunications and informatics

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Abstract

This paper proposes a handoff scheme in a wireless access network where IEEE802.11 is used as link layer protocol and Mobile IP as network layer protocol. The scheme uses triggers available from IEEE802.11, together with packet buffering in the old Access Point and packet forwarding from the old to the new Access Point in order to provide a smooth handoff. The proposed scheme has been implemented on a Linux based testbed and it has been analysed by means of an ns simulation and an analytical model. The paper reports on the results obtained from the testbed, the simulation and the analytical model, both for constant bit rate traffic (in particular streamed RTP video) and TCP traffic.