Reducing Handover Delay by Preselective Scanning Using GPS
IEEE 802.11 based mobile communication towers is used very much in many personal and industrial purposes as it provides a continuous connectivity to Mobile Nodes (MNs) and allows them to change their attachment point from old Access Point (A)P to new AP while needed. But one main problem of continuous connectivity is handover latency which consists of scanning, authentication and re-association phases. Scanning is the most time consuming part of handover process. In this paper, the authors introduce a pre-scanning mechanism using Global Positioning System (GPS) to reduce handover delay. In the method, scanning is completed almost before actual handover starts. From the simulation results, it can be seen that the proposed mechanism reduces handover delay by a great deal.