Service-specific wavelength allocation in QoS-routed optical networks

In this paper, quality-of-service (QoS) routing and service-specific functions in optical networks are proposed. We first present two QoS-routing algorithms, which differ in the way of handling quality attributes like transmission performance, blocking probability and cost. We furthermore propose a new wavelength allocation scheme, called least quality allocation. Particular functions like service-specific wavelength shifting, variable link costs or limited path length per service are studied in more detail. This is studied by numerical examples of optical networks in meshed topologies with different services and traffic conditions. The benefit of this approach is that many corporate optical networks with different QoS-requirements can be simultaneously accommodated.