Virtual Network Mapping in Elastic Optical Networks with Advance Reservation

Elastic optical networks are promising candidates for next-generation backbone networks due to their capability to efficiently and flexibly allocate optical bandwidth to demands with heterogeneous requirements. Scientific applications involving data processing, analysis, and transmission among multiple data centers can be modeled as virtual network requests. For delay-tolerant applications, the virtual network request has a specific deadline and is successfully mapped as long as sufficient resources are allocated to it before the deadline. In this paper, we investigate the dynamic virtual network mapping problem for advance reservation virtual network requests in elastic optical networks. We propose a stop-and-resume allocation scheme to map virtual network requests in order to satisfy deadline constraints and resource requirements, where the service duration of a request is divided into periods with different resources being allocated in different periods. Simulation results are presented to show the effectiveness of the proposed approach compared with a baseline algorithm in terms of request blocking ratio.