Routing in medium term optical networks in ICT STRONGEST

In Wavelength Switched Optical Networks (WSONs) with dynamic path establishment and wavelength assignment, connection requests between a source and a destination node are negotiated at lightpath connection set up, where a specific wavelength is assigned for data transportation among the two nodes that may span multiple links. In order to guarantee QoS in such networks Wavelength Routing Algorithms should be appropriately developed to ensure minimum blocking while physical layer performance is guaranteed for all established lightpaths. The latter is guaranteed with the introduction of appropriate Physical Layer Impairment awareness in the path establishment procedure. Furthermore the routing engine should be able to address the issue of network availability which, in turn, requires efficient resilience mechanisms. In this paper we present the routing strategies developed in the framework of ICT STRONGEST project, suitable for dynamic optical networks during planning and operation of such networks.