Advanced SearchSearch Tips
Improvement of Handoff Performance Using Prefetched AP Information in IEEE 802.11
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Improvement of Handoff Performance Using Prefetched AP Information in IEEE 802.11
Lee, Han-Na; Kim, Hyang-Mi; Kim, Sangkyung;
  PDF(new window)
This paper proposes the improved handoff mechanism for IEEE 802.11 wireless LANs. When a wireless mobile node moves out of the coverage of its currently associated AP(Access Point) and needs to be re-associated with a new AP, a handoff procedure is initiated. Channel scanning process during a handoff procedure occupies over 90% of total handoff latency. Long latency leads to many packet losses and service discontinuity, which degrades wireless network performance. This paper describes about the new mechanism to improve handoff performance by skipping channel scanning during a handoff procedure. In oerder for that, acquires neighboring AP information such as its address, location, channel number in use, the number of associated nodes before handoff, and delivers the information to its associated mobile nodes. The mobile nodes can reduce handoff latency and perform more exact handoff using the delivered AP information. We have conducted simulations to analyze our proposal's performance and confirmed that handoff latency and the number of handoff occurrences are decreased.
handoff;handover;IEEE 802.11;access point;handoff latency;
 Cited by
IEEE 802.11, Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, 2007.

A. Mishra, M. Shin, and W. Arbaugh, "An empirical analysis of the IEEE 802.11 MAC layer handoff process," ACM Mob. Comput. and Commun. Rev., vol. 33, no. 2, pp. 93-102, Apr. 2003. crossref(new window)

T. Y. Wu, C. C. Lai, and H. C. Chao, "Efficient IEEE 802.11 handoff based on a novel geographical fingerprint scheme," Wirel. Commun. Mob. Comput., vol. 6, no. 1, pp. 127-135, Feb. 2006. crossref(new window)

H. Wu, K. Tan, Y. Zhang, and Q. Zhang, "Proactive scan: Fast handoff with smart triggers for 802.11 wireless LAN," IEEE INFOCOM, pp. 749-757, Anchorage, USA, May 2007.

H. J. Choi, C. S. Seok, S. H. Lee, and J. D. Kim, "Design and implementation of a multi-interface mobile gateway for seamless handoff sciences," J. KICS, vol. 37B, no. 6, pp. 474-482, Jun. 2012.

J. S. Lee and J. P. Jeong, "Performance analysis of cross-layer handoff scheme in IP-Based next-generation wireless networks," J. KICS, vol. 38, no. 6, pp. 454-472, Jun. 2013.

J. H. Lee and H. K. Park, "Handoff scheme based on adaptive channel prediction in cognitive radio networks," J. KICS, vol. 18. no. 10, pp. 2389-2396, Dec. 2014.

W. Wanalertlak and B. Lee, "Global path-cache technique for fast handoffs in WLANs," ICCCN 2007, pp. 45-50, Honolulu, USA, Aug. 2007.

S. H. Han, S. C. Yang and J. D. Kim, "Design and Implementation of Geographical Handoff System Using GPS Information," J. KICS, vol. 35, no. 6, pp. 33-43, Jan. 2010.

J. Montavont and T. Noel, "IEEE 802.11 handovers assisted by GPS information," in Proc. IEEE Int. Conf. Wirel. Mob. Comput., Netw. Commun., pp. 166-172, Montreal, Canada, Jun. 2006.

IEEE 802.11f, IEEE Trial-Use Recommended Practice for Multi-Vendor Access Point Interoperability via an Inter-Access Point Protocol Across Distribution Systems Supporting IEEE 802.11TM Operation, 2003

Y. S. Cho, J. Kim, and W. Y. Yang, MIMOOFDM wireless communication with MATLAB, John Wiley & Sons Inc., 2010.