Open Access

An 802.11k Compliant Framework for Cooperative Handoff in Wireless Networks

  • George Athanasiou1Email author,
  • Thanasis Korakis2 and
  • Leandros Tassiulas1
EURASIP Journal on Wireless Communications and Networking20092009:350643

https://doi.org/10.1155/2009/350643

Received: 17 November 2008

Accepted: 9 July 2009

Published: 6 September 2009

Abstract

In IEEE 802.11-based wireless networks, the stations (STAs) are associated with the available access points (APs) and communicate through them. In traditional handoff schemes, the STAs get information about the active APs in their neighborhood by scanning the available channels and listening to transmitted beacons. This paper proposes an 802.11k compliant framework for cooperative handoff where the STAs are informed about the active APs by exchanging information with neighboring STAs. Besides, the APs share useful information that can be used by the STAs in a handoff process. In this way, we minimize the delay of the scanning procedure. We evaluate the performance of our mechanisms through OPNET simulations. We demonstrate that our scheme reduces the scanning delay up to 92%. Consequently, our system is more capable in meeting the needs of QoS-sensitive applications.

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Authors’ Affiliations

(1)
Department of Computer and Communications Engineering, University of Thessaly
(2)
Department of Electrical and Computer Engineering, Polytechnic University

Copyright

© George Athanasiou et al. 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.