An 802.11k Compliant Framework for Cooperative Handoff inWireless Networks
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George Athanasiou,1 Thanasis Korakis,2 and Leandros Tassiulas1
1Department of Computer and Communications Engineering, University of Thessaly, 37 Glavani Street 382 21 Volos, Greece
2Department of Electrical and Computer Engineering, Polytechnic University, 5 Metrotech Center, Brooklyn, NY 11201, USA
Correspondence should be addressed to George Athanasiou, gathanas@uth.gr
Received 17 November 2008; Revised 16 February 2009; Accepted 9 July 2009
Recommended byWei Li
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.
Copyright © 2009 George Athanasiou et al. 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.
1Department of Computer and Communications Engineering, University of Thessaly, 37 Glavani Street 382 21 Volos, Greece
2Department of Electrical and Computer Engineering, Polytechnic University, 5 Metrotech Center, Brooklyn, NY 11201, USA
Correspondence should be addressed to George Athanasiou, gathanas@uth.gr
Received 17 November 2008; Revised 16 February 2009; Accepted 9 July 2009
Recommended byWei Li
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.
Copyright © 2009 George Athanasiou et al. 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.
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langlaile
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找了很久,终于在这里找到啦,不错