01192nas a2200121   4500000000100000008004100001260003300042100001800075700001600093245009200109490000700201520086200208       2009                            d  bSpringer Berlin / Heidelberg1 aMateusz Nowak1 aPiotr Pecka00aSimulation and Analytical Evaluation of a Slotted Ring Optical Packet Switching Network0 v643 a<p>Optical Packet Switching (OPS) is a technology which thanks to its speed of operation may become popular in next-generation networks. Because optical packets are not buffered it is necessary to develop new mechanisms which would allow quality of service management in OPS networks. The paper discusses the architecture of OPS networks of the ring type with nodes enabling optical packet switching, equipped with the mechanism of Quality of Service (QoS) management. The differentiation of the quality of service was achieved by means of the proposed mechanism of priority registers with the timeout mechanism. This enables the network to be used for transporting various classes of data with varying requirements as to the quality of service. Simulation trials have been conducted and an analytical model for this type of network has been proposed.</p>