Novel framework for proactive handover with seamless multimedia over WLANs

Novel framework for proactive handover with seamless multimedia over WLANs

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IET Communications — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

Supporting multimedia applications over 802.11 wireless LANs requires low latency and seamless handover between multiple access points. However, the existing handover process in 802.11 products suffers from very high delay and frequent service disruption, which are not acceptable for streaming multimedia applications. In order to reduce this high delay and service disruption, the authors have designed and implemented a new proactive handover strategy over 802.11. The strategy intelligently issues proactive scan and handover triggers to reduce the effective channel scanning delay. Subsequently, it reserves resources in advance, to reduce the handoff reconnection delay and provide necessary QoS guarantee. Using actual implementation and simulation study, the authors demonstrate that their proposed strategy is capable of achieving magnitudes of latency, jitter and throughput improvements during the 802.11 handover operations, thereby providing seamless multimedia transmission.


    1. 1)
      • Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, IEEE standard 802.11, 1999.
    2. 2)
    3. 3)
      • Wi-Fi Alliance. Available at
    4. 4)
    5. 5)
      • Mishra, A., Shin, M., Arbaush, W.A.: `Context caching using neighbor graphs for fast handoffs in a wireless network', IEEE INFOCOM, 2004, p. 351–361.
    6. 6)
    7. 7)
      • Cisco Fast Secure Roaming. Available at
    8. 8)
      • Ramani, I., Savage, S.: `SyncScan: a practical fast handoff for 802.11 infrastructure networks', IEEE INFOCOM, 2005, p. 675–684.
    9. 9)
      • Brik, V., Mishra, A., Banerjee, S.: `Eliminating handoff latencies in 802.11 WLANs using multiple radios: applications, experience, and evaluation', Proc. Fifth ACM SIGCOMM Conf. on Internet Measurement (IMC), 2005, p. 27–32.
    10. 10)
      • Waharte, S., Ritzenthaler, K., Boutaba, R.: `Selective active scanning for fast handoff in WLAN using sensor networks', IEEE MWCN, 2004.
    11. 11)
      • Wu, H., Tan, K., Zhang, Y., Zhang, Q.: `Proactive scan: fast handoff with smart triggers for 802.11 wireless LAN', IEEE INFOCOM, 2007, p. 749–757.
    12. 12)
    13. 13)
    14. 14)
    15. 15)
    16. 16)
    17. 17)
    18. 18)
      • Boysen, E.S., Kjuus, H.E., Maseng, T.: `Proactive handover in heterogeneous networks using SIPs', Int. Conf. on Networking, 2008, p. 719–724.
    19. 19)
      • Dutta, A., Chakravarty, S., Taniuchi, K.: `An experimental study of location assisted proactive handover', Global Telecommunications Conf. (GLOBECOM), 2007, p. 2037–2042.
    20. 20)
    21. 21)
    22. 22)
      • Bargh, M.S., Hulsebosch, R.J., Eertink, E.H.: `Fast authentication methods for handovers between IEEE 802.11 wireless LANs', Wireless Mobile Applications and Services on WLAN Hotspots (WMASH), 2004, p. 51–60.
    23. 23)
      • Chandra, R., Bahl, P.: `MultiNet: connecting to multiple IEEE 802.11 networks using a single wireless card', IEEE INFOCOM, 2004, p. 882–893.
    24. 24)
      • Calhoun, P., Suri, R., Cam-Winget, N.: `Light weight access point protocol', RFC 5412, Feb. 2010.
    25. 25)
      • Mhatre, V., Papagiannaki, K.: `Using smart triggers for improved user performance in 802.11 wireless networks', Int. Conf. on Mobile Systems, Applications and Services (MobiSys), 2006, p. 246–259.
    26. 26)
      • Wireless LAN Medium Access Control (MAC) and physical layer (PHY) specifications: Radio Resource Measurement, IEEE P802.11k/D2.0, February 2005.
    27. 27)
      • Kwak, J.A.: `Received signal to noise indicator', US, 2006/0234660, 19 October 2006.
    28. 28)
      • Atheros Communications – Wireless Drivers. Available at
    29. 29)
      • A. Tirumala , F. Qin , J. Dugan , J. Ferguson , K. Gibbs . Iperf version 2.0.2.
    30. 30)
      • Advanced video coding for generic audiovisual services. ITU-T H.264, 2005.
    31. 31)
      • The Network Simulator (NS-2). Available at

Related content

This is a required field
Please enter a valid email address