Minimization of Handoff Latency by Vector Analysis Method
Due to rapid growth in IEEE 802.11 based Wireless Local Area Networks(WLAN), handoff has become a burning issue. A mobile station (MS) requires handoff when it travels out of the coverage area of its current access point (AP) and tries to associate with another AP. But handoff delays provide a serious barrier for such services to be made available to mobile platforms. Throughout the last few years there has been plenty of research aimed towards reducing the handoff delay incurred in the various levels of wireless communication. In this paper we propose a method using the GPS(Global Positioning System) to determine the positions of the MS at different instants of time and then by applying vector analysis method on the trajectory of MS path to determine the potential AP(s) where the MS has maximum probability of travelling in the future. This will result in a reduction of number of APs to be scanned as well as handoff latency will be reduced to a great extent.
Keywords: IEEE 802.11, Handoff latency, GPS (Global Positioning System), Vector resolution, Neighbor APs
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