[1] Ni Weiguo, Dong Yongqiang, Xia Qin,. Station based fast handoff solutionfor IEEE 802.11 b/g wireless LANs [J]. Journal of Southeast University (English Edition), 2008, 24 (2): 149-154. [doi:10.3969/j.issn.1003-7985.2008.02.005]

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Station based fast handoff solutionfor IEEE 802.11 b/g wireless LANs()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

24

Issue:

2008 2

Page:

149-154

Research Field:

Computer Science and Engineering

Publishing date:

2008-06-03

Info

Title:

Station based fast handoff solutionfor IEEE 802.11 b/g wireless LANs

Author(s):

Ni Weiguo;  Dong Yongqiang;  Xia Qin

Key Laboratory of Computer Network and Information Integration of Ministry of Education, Southeast University, Nanjing 210096, China

Keywords:

IEEE 802.11;  WLAN;  fast handoff

PACS:

TP391

DOI:

10.3969/j.issn.1003-7985.2008.02.005

Abstract:

Real-time applications are sensitive to conditions such as transmission delay and jittering.To cut down on the influence generated by the WLAN handoff process, three parts of WLAN(wireless local area networks)handoff:handoff triggering, access point selection and the fast handoff algorithm are investigated.A fast handoff solution totally based on the station is proposed and it is composed of three parts:a handoff triggering mechanism based on dynamic threshold adjustment;an AP selection criterion based on probe delay;a fast handoff algorithm with differentiated channel selection and a dynamic cache.The station based solution is independent with AP’s collaboration and avoids any changes in the IEEE 802.11 protocol.It is robust and has very good extensibility.Through tests and evaluation in a hotspot WLAN, the solution effectively reduces handoff latency and user experience of real-time applications is enhanced.

References:

[1] IEEE Standard 802.11.Wireless LAN medium access control(MAC)and physical layer(PHY)specifications [S].LAN/MAN Standards Committee of the IEEE Computer Society, 1999.
[2] Gast Matthew S.802.11 wireless networks—the definitive guide [M].Beijing:Tsinghua University Press, 2002:77-93.
[3] Sundaresan Karthikeyan, Papagiannaki Konstantina.The need for cross-layer information in access point selection algorithms [C]//Proc of the 6th ACM SIGCOMM on Internet Measurement. New York, NY, USA:ACM, 2006:257-262.
[4] Abusubaih Murad, Gross James, Wiethoelter Sven, et al.On access point selection in IEEE 802.11 wireless local area networks [C]//Proc of 31st IEEE Local Computer Networks Conference.Tampa, FL, USA, 2006:879-886.
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[8] Shin M, Mishra A, Arbaugh W.Improving the latency of 802.11 hand-offs using neighbor graphs [C]// Proceedings of the 2nd International Conference on Mobile Systems, Applications, and Services.Boston, MA, USA, 2004:70-83.
[9] Park S, Kim H, Park C, et al.Selective channel scanning for fast handoff in wireless LAN using neighbor graph [C]//Lecture Notes in Computer Science.Springer, 2004:194-203.
[10] Liao Yong, Gao Lixin.Practical schemes for smooth MAC layer handoff in 802.11 wireless networks [C]//Proceedings of the 2006 International Symposium on World of Wireless, Mobile and Multimedia Networks.Washington, DC, USA:IEEE Computer Society, 2006:181-190.
[11] Shin S, Forte A G, Rawat A S, et al.Reducing MAC layer handoff latency in IEEE 802.11 wireless LANs [C]//Proc of the Second International Workshop on Mobility Management & Wireless Access Protocols.Philadelphia, PA, USA, 2004:19-26.

Memo

Memo:

Biographies: Ni Weiguo(1982—), male, graduate;Dong Yongqiang(1973—), male, doctor, dongyq@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.90604003, 60603067).
Citation: Ni Weiguo, Dong Yongqiang, Xia Qin.Station based fast handoff solution for IEEE 802.11 b/g wireless LANs[J].Journal of Southeast University(English Edition), 2008, 24(2):149-154.

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