A new 2D direction-based predictive reservation scheme for WLAN environments with passive advanced reservations

In last years there has been a lot of research and development in wireless communications and mobility management, with the main purpose of connections handling between mobile hosts and base stations or access points, when different coverage areas are visited. This paper presents a novel 2D reservation scheme for WLANs; a general prediction technique based both on the analysis of Cell Stay Time (CST) and on the direction probabilities of hand-in and hand-out events of mobile nodes from wireless cells is outlined. In particular, a threshold-based algorithm is presented, trying to take into account the mobility behavior of mobile users, through the analysis of a Hand-off Directional Probabilities (HDP) matrix. Users' mobility has been analyzed, in order to reduce passive resource reservations, with a high gain in system utilization. In particular, an integrated architecture able to make active and passive reservations has been employed as a possible application of the proposed approach. The performances of the 2D wireless system have been evaluated in terms of prediction error and system utilization; in addition, some comparisons with older prediction schemes have been made. © 2007 IEEE.