A new link-state availability model for reliable protection in optical WDM networks

This paper investigates a generalized protection framework for availability-guaranteed connection provisioning in an optical wavelength-division multiplexing (WDM) mesh network. We develop a link-state-modeling mechanism to form a dynamic link-state parameter, called link and resource availability (LRA). Such link-state information can be used by a standard link-state routing protocol to efficiently provision reliable connections. Based on the LRA parameter, we then propose a connection-provisioning algorithm which can guarantee customers´ availability requirements. A new generalized protection model is developed through our dynamic LRA-based provisioning. Numerical results demonstrate the performance of the proposed provisioning approach to be promising.