An end-to-end QoS framework with on-demand bandwidth reconfiguration

Authors:
Mei Yang;Yan Huang;Jaime Kim;Meejeong Lee;Tatsuya Suda;Matsubara Daisuke
Affiliations:
Department of Information and Computer Science, University of California-Irvine, Irvine, CA 92612, USA;Department of Information and Computer Science, University of California-Irvine, Irvine, CA 92612, USA;Department of Computer Science, California State University-Northridge, Northridge, CA 91330, USA;Department of Computer Science and Engineering, Ewha Womans University, South Korea;Department of Information and Computer Science, University of California-Irvine, Irvine, CA 92612, USA;Central Research Lab of Hitachi, Ltd, Japan
Venue:
Computer Communications
Year:
2005

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Abstract

This paper proposes a new QoS framework, called the On-Demand QoS Path framework (ODP). It provides end-to-end QoS guarantees to individual flows with minimal overhead, while keeping the scalability characteristic of DiffServ. ODP exercises per-flow admission control and end-to-end bandwidth reservation at the edge of the network and only differentiates service types in the core of the network. In addition, to adapt to dynamically changing traffic load, ODP monitors the bandwidth utilization of the network and performs dynamic bandwidth reconfiguration in the network core based on the monitored bandwidth utilization. Through extensive simulations, the performance of ODP is investigated and compared with that of IntServ and DiffServ frameworks. The simulation results clearly showed that ODP provides end-to-end QoS guarantees to individual flows, which DiffServ can not provide, with much less overhead than IntServ.