GOSP

Recent technological advances in dense wavelength division multiplexing (DWDM) component technologies have led to profound transformations at the networking layer, ushering in revamped, highly-scalable "on-demand" bandwidth provisioning paradigms. Guaranteed service provisioning is an important and a challenging problem in core, metro, and also access networks. The types of applications being deployed across the public Internet today are increasingly mission-critical, whereby business success can be jeopardized by poor performance of the network. It does not matter how attractive and potentially lucrative these applications are if the network does not function reliably and consistently. Satisfying customer demands is of utmost importance for the service providers. Different applications/customers may need different levels of service guarantees in terms quality of service (QoS) parameters such as bandwidth, fault tolerance, recovery time, reliability, availability, response time, packet/burst loss, BER, etc. In such scenarios optical networks will not be much promising unless they can guarantee a predictable performance as specified by the QoS parameters. Thus guaranteed optical services become a vital tool to ensure that several kinds of applications can coexist and function at acceptable levels of performance.