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2009 Sixth International Conference on Broadband Communications, Networks, and Systems. Broadnets 2009 (2009)
Madrid
Sept. 14, 2009 to Sept. 16, 2009
ISSN: 2150-4903
ISBN: 978-963-9799-49-3
pp: 1-6
Kostas Ramantas , Computer Engineering and Informatics Department & Research Academic Computer Technology Institute, University of Patras, Rio, Greece
Tito Raul Vargas , ITEAM, Instituto de Telecomunicaciones y Aplicaciones Multimedia Universidad Politécnica de Valencia, Spain
Juan Carlos Guerri , ITEAM, Instituto de Telecomunicaciones y Aplicaciones Multimedia Universidad Politécnica de Valencia, Spain
Kyriakos Vlachos , Computer Engineering and Informatics Department & Research Academic Computer Technology Institute, University of Patras, Rio, Greece
ABSTRACT
In optical burst switching (OBS) networks one of the most challenging problems is to provide service differentiation. The lack of buffering in the intermediate nodes, makes QoS provisioning in OBS networks a difficult problem to address. In this work, we propose a scheduling algorithm that supports QoS based on preemptions, which are controlled by a novel preemption policy. Our claims are validated by analytical modelling and experimental analysis through simulations using data belonging to two different classes of service - best effort and video streaming data. Performance evaluation is based on throughput measurements for best effort class, and perceived quality metrics like PSNR and MOS scores for the video streaming class.
INDEX TERMS
DiffServ networks, optical burst switching, optical fibre networks, quality of service, scheduling
CITATION

K. Ramantas, T. R. Vargas, J. C. Guerri and K. Vlachos, "A preemptive scheduling scheme for flexible QoS provisioning in OBS networks," 2009 Sixth International Conference on Broadband Communications, Networks, and Systems. Broadnets 2009(BROADNETS), Madrid, 2009, pp. 1-6.
doi:10.4108/ICST.BROADNETS2009.7205
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