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Global Path-Cache Technique for Fast Handoffs in WLANs

TitleGlobal Path-Cache Technique for Fast Handoffs in WLANs
Publication TypeConference Paper
Year of Publication2007
AuthorsWanalertlak, W., and B. Lee
Conference Name2007 16th International Conference on Computer Communications and Networks
Pagination45 - 50
Date Published08/2007
Conference LocationHonolulu, HI
ISBN Number978-1-4244-1251-8
Keywordsaccess points, handoff, mobile stations, mobility, scanning, WLANs

This paper proposes a technique called Global Path-Cache (GPC) that provides fast handoffs in WLANs. GPC maintains a history of mobile stations' mobility patterns in a network to assist in the prediction of the next point-of-attachment. GPC properly captures the dynamic behavior of the network and mobile stations, and provides accurate next AP predictions. 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.