Performance Analysis of the Simple Prioritized Buffering Algorithm in Optical Packet Switch for DiffServ Assured Forwarding

This paper addresses the problem of providing QoS management for optical packet switch. In particular we propose the Simple Prioritized Buffering Algorithm (SPBA) for prioritized buffer’s management, which aims to guarantee different packet loss probabilities to different packet streams. In contrast to other solutions, SPBA does not need any resource reservation or threshold dropping, but only makes use of priority scheduling. A theoretical model of SPBA with K classes of services applied to an optical packet switch with fiber-delay lines buffers and tunable wavelength converters is presented. The analytical model is verified by simulations.