Path differentiated QoS provisioning scheme for OBS networks

Optical Burst Switching (OBS) network is emerging as a promising technology for next generation optical internet due to its suitability to carry bursty traffic, adapting to the technological constraints of all optical networks. A significant issue for next-generation networks is the ability to support a wide range of services for different types of applications. In order to support these services, the network must be able to provide guarantees as well as differentiation with respect to parameters such as loss and delay. In general, QoS can be provided in OBS networks by introducing differentiation at some point in the network. In this paper a differentiated path selection scheme based on static routing is proposed to achieve QoS. Analysis shows that the proposed strategy provides service differentiation for real-time and non-real-time traffic classes as required and also significantly improves overall burst loss performance compared to the classless OBS with shortest path routing.