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Scanless Fast Handoff Technique Based on Global Path Cache for WLANs

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https://ir.library.oregonstate.edu/concern/articles/b5644x02p

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Abstract
  • Wireless LANs (WLANs) have been widely adopted and are more convenient as they are inter-connected as wireless campus networks and wireless mesh networks. However, time-sensitive multimedia applications, which have become more popular, could suffer from long end-to-end latency in WLANs. This is due mainly to handoff delay, which in turn is caused by channel scanning. This paper proposes a technique called Global Path-Cache (GPC) that provides fast handoffs in WLANs. GPC properly captures the dynamic behavior of the network and MSs, and provides accurate next-AP predictions to minimize the handoff latency. Moreover, the handoff frequencies are treated as time-series data, thus GPC calibrates the prediction models based on short term and periodic behaviors of mobile users. Our simulation study shows that GPC virtually eliminates the need to scan for APs during handoffs and results in much better overall handoff delay compared to existing methods.
  • Keywords: Mobility prediction, Time series analysis, Handoff, Wireless LANs, Channel scanning
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  • Wanalertlak, W., Lee, B., Yu, C., Kim, M., Park, S. M., & Kim, W. T. (2013). Scanless fast handoff technique based on global Path-Cache for WLANs. Journal of Supercomputing, 66(3), 1320-1349. doi:10.1007/s11227-012-0805-7
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  • 66
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  • 3
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  • The work described in this paper was supported in part by the NSF under Grant CNS-0821319, Korean NRF under WCU Grant R31-2008-000-10100-0, and IT R&D Program of MKE/KEIT [10035708, “The development of CPS core technologies for high confidential autonomic control software”].
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