Reducing handover failure probability by repetitive scanning process

Abstract

In wireless communication, handoff has become an important topic of research. 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 failure probability provides a serious barrier for such services to be made available to mobile platforms. Throughout the last few years plenty of research had been done to reduce handoff failure probability, whereas very few of them can be applied for an irregular (haphazard) motion of MS. In this paper, we are going to implement a new handoff scheme which is applicable for both regular and irregular motion of MS. We will find the minimum time interval (T) that the MS should stay within the handoff region (the particular area within a cell where the handoff is initiated and performed). We will repeat the scanning process number of times at different points of MS trajectory within the handoff region until the total scanning time exceeds the fixed time interval (T) and by doing so we can find out the most significant AP. Our simulation results show the effectiveness of our proposed scheme in practical field.