An efficient Quality of Service (QoS) scheme for all optical networks

This paper addresses the issue of providing Quality of Service (QoS) for optical burst switching (OBS) systems. In this paper, an efficient QoS oriented integrated scheme based on Optical Burst/Circuit Switching network architecture has been proposed. The proposed scheme utilizes the modified Just-Enough-Time (JET) protocol and advanced reservation based on Linear Predictive Filter (LPF), which can provide differentiated services for optical burst switching (OBS) network. Simulation results show that the proposed scheme is reasonably better than a First Come First Served (FCFS) protocol in guaranteeing QoS of real-time traffic. Also, the results yield significant delay reduction for time-critical traffic, while maintaining the bandwidth overhead within limits. As a result, the proposed scheme has achieved QoS differentiation in terms of burst loss rate in comparison to conventional schemes.