A preemptive scheduling scheme for flexible QoS provisioning in OBS networks
January 1, 2009·
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0 min read
Kostas Ramantas
Tito R. Vargas
Juan Carlos Guerri
Kyriakos Vlachos
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.
Type
Publication
Proceedings of the 6th International ICST Conference on Broadband Communications, Networks, and Systems. IEEE
Authors
Postdoctoral Researcher
Tito Raúl Vargas Hernández graduated in Telecommunications Engineering from Universidad Santo Tomás (USTA), Bucaramanga, Colombia, in 2003. He received the M.Sc. in Telematics Engineering in 2007 and the PhD in Telecommunications in 2023 from the Universitat Politècnica de València (UPV). He worked with the COMM group at iTEAM from 2005 to 2010 and has been a lecturer and researcher at USTA since 2010. In 2022 he joined iTEAM as a research engineer, where he is now a postdoctoral researcher. His research covers multimedia distribution over IP/optical networks, energy-efficient Ethernet, QoS in high-speed networks and the Internet of Things.
Authors
Full Professor · Head of the group
Juan Carlos Guerri Cebollada was born in Valencia, Spain in 1969. He received his M.S. and Ph.D. degrees in Telecommunication Engineering from the Universitat Politècnica de València (UPV) in 1993 and 1997, respectively. He is a Full Professor in the Department of Communications Engineering at UPV, where he teaches at the ETSI Telecomunicación. He leads the Multimedia Communications research group (COMM) of the iTEAM (Institute of Telecommunications and Multimedia Applications). His research spans multimedia communications, adaptive video streaming (DASH), quality of experience, wireless and ad hoc networks, and the application of multimedia technologies to industry, medicine, education and communications.