Wang-Rong Chang

Optical burst switching (OBS) is not only cost-effective, but also provides high throughput, high bandwidth utilization, and low transmission latency. These benefits render OBS a viable solution for next-generation metro area networks (MANs). This study develops a novel distributed medium access control (MAC) protocol to support differentiated services in the collision-free optic-burst ring network (CORNet) proposed by the current authors in a previous study. The proposed quality of service (QoS) provisioning mechanism adopts a bandwidth-reservation approach which combines real-time transmission establishment and termination routines to support the efficient integration of real-time and best-effort (data) services. The simulation results demonstrate the effectiveness and efficiency of the proposed protocol

This paper proposes a new switching architecture to be used in all optical networks. The proposed switch, denoted as M2-B-Quadro, is an extension of the 2 times 2 two-stage multi-buffer bypass Quadro (M-B-Quadro) switch introduced by the current authors in Ho-Ting Wu et al. (2005). By incorporating bypass lines and employing a novel switch control strategy, denoted as POS, the proposed switching node effectively resolves packet contentions and provides a substantial reduction in the packet deflection probability. We also demonstrate that such architecture can also be applied to design a generic multiple stages switch of a larger number of input/output ports with superior performances