Adaptive resource reservation schemes for proportional DiffServ enabled fourth-generation mobile communications system

Authors:
Chenn-Jung Huang;Yi-Ta Chuang;Wei Kuang Lai;Yu-Hang Sun;Chih-Tai Guan
Affiliations:
Department of Computer and Information Science, College of Science, National Hualien University of Education, Hualien 970, Taiwan;Department of Computer and Information Science, College of Science, National Hualien University of Education, Hualien 970, Taiwan;Department of Computer Science and Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;Department of Computer Science and Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;Department of Computer and Information Science, College of Science, National Hualien University of Education, Hualien 970, Taiwan
Venue:
Computer Communications
Year:
2007

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Abstract

Many mechanisms based on bandwidth reservation have been proposed in the literature to decrease connection dropping probability for handoffs in cellular communications. The handoff events occur at a much higher rate in packet-switched fourth generation mobile communication networks than in traditional cellular systems. An efficient bandwidth reservation mechanism for the neighboring cells is therefore critical in the process of handoff during the connection of multimedia calls to avoid the unwillingly forced termination and waste of limited bandwidth in fourth generation mobile communication networks, particularly when the handoff traffic is heavy. In this paper, two self-adaptive bandwidth reservation schemes, which adopt support vector regression and swarm intelligence techniques, respectively, are proposed to reduce the forced termination probability of multimedia handoffs. Meanwhile, a proportional differentiated service model is incorporated into our schemes to accommodate new metrics used in processing handoffs in next generation networks. The simulation results show that both the proposed schemes can achieve superior performance than the representative bandwidth-reserving schemes in the literature when performance metrics are measured in terms of the forced termination probability for the handoffs, the call blocking probability for the new connections and bandwidth utilization.