A Two-phase Approach for Dynamic Lightpath Scheduling in WDM Optical Networks

— Lightpath scheduling is an important capability in next-generation wavelength-division multiplexing (WDM) optical networks to reserve resources in advance for a specified time period while provisioning end-to-end lightpaths. In a dynamic environment, the end user requests for dynamic scheduled lightpath demands (D-SLDs) need to be serviced without the knowledge of future requests. Even though the starting time of the request may be hours or days from the current time, the end-user however expects a quick response as to whether the request could be satisfied. We propose a twophase approach to dynamically schedule and provision D-SLDs. In the first phase, termed the deterministic lightpath scheduling phase, upon arrival of a lightpath request, the network control plane schedules a path with guaranteed resources so that the user can get a quick response with a deterministic lightpath schedule. In the second phase, termed the lightpath re-optimization phase, we re-provision some alread...

• Type: Conference
• Year: 2007
• Where: ICC
• Authors: Lu Shen, Xi Yang, Ajay Kumar Todimala, Byrav Ramamurthy
• Keywords: Communications, Dynamic Scheduled Lightpath, ICC 2007, Lightpath Scheduling, Quick Response