Mobility prediction based resource reservation for handoff in in multimedia wireless cellular network
In this paper, a mobility predictive based resource (bandwidth) reservation is proposed to provide flexible usage of limited resource in wireless cellular networks. Currently, multimedia communications is urgently expected in wireless networks. That as there is more and more high speed applications that emerge for wireless networks. One of the most important and complicated issues is the Quality of Service (QoS) in next wireless networks. In other words, the problem to maintain the playing continuity of multimedia streams during handoff is hard for solution. Hence, in this paper, the scheme is proposed to provide high accurate prediction of next crossing cell that Mobile Terminal is going to, in order to avoid too early or over reservation resulting in a waste of resources. The amount of bandwidth to be reserved is dynamically adjusted according to the current position and extrapolated direction of Mobile Terminal. An admission control scheme is also considered to further guarantee the QoS of real time traffic. The performance of system is evaluated through discrete event simulation of realistic wireless cellular environment. Simulation results show that the proposed scheme as compared to the existing schemes is efficient to reduce the New Call Blocking Probability and the Handoff Call Dropping Probability of real time traffic. In addition, it is efficient to reduce the number of terminated ongoing calls of non-real time traffic and the cancels reservation that increase the system bandwidth utilization.
mobility prediction resource reservation wireless cellular networks handoff and quality of service