Title :
A preemptive scheduling scheme for flexible QoS provisioning in OBS networks
Author :
Ramantas, Kostas ; Vargas, Tito Raúl ; Guerri, Juan Carlos ; Vlachos, Kyriakos
Author_Institution :
Comput. Eng. & Inf. Dept., Univ. 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.
Keywords :
DiffServ networks; optical burst switching; optical fibre networks; quality of service; scheduling; analytical modelling; flexible QoS provisioning; optical burst switching network; preemptive scheduling scheme; service differentiation; video streaming data; Computer networks; Optical burst switching; Optical computing; Processor scheduling; Quality of service; Scheduling algorithm; Streaming media; Telecommunication computing; Telecommunication traffic; Traffic control; Burst Scheduling; Class of Service; Optical Burst Switching; preemtions;
Conference_Titel :
Broadband Communications, Networks, and Systems, 2009. BROADNETS 2009. Sixth International Conference on
Conference_Location :
Madrid
Print_ISBN :
978-963-9799-49-3
Electronic_ISBN :
978-963-9799-49-3
DOI :
10.4108/ICST.BROADNETS2009.7205