Nonlinear Impairment-Aware Static Resource Allocation in Elastic Optical Networks

Juzi Zhao, Henk Wymeersch, Erik Agrell
2015 Journal of Lightwave Technology  
This paper studies the routing, modulation format, and spectrum allocation problem in elastic fiberoptical networks for static traffic. Elastic networks, based on Nyquist wavelength division multiplexing or optical orthogonal frequency division multiplexing, can efficiently utilize the optical fiber's bandwidth in an elastic manner by partitioning the bandwidth into hundreds or even thousands of subcarriers. Besides the amplified spontaneous emission noise, the nonlinear impairments of each
more » ... ection is explicitly considered by utilizing an analytical model to calculate the nonlinear interference from other connections propagating in the same fibers. The objective of our work is to minimize the bandwidth, i.e., the number of used subcarriers, across the network, while satisfying demands on throughput and quality for all connections. A novel integer linear program formulation and low-complexity heuristics are proposed. Simulation results are presented to demonstrate the effectiveness of the proposed approaches. Compared with transmission reach-based benchmark methods, our methods can achieve up to 31% bandwidth reduction. Index Terms-NWDM, OOFDM, elastic optical networks, routing and spectrum assignment, physical impairments.
doi:10.1109/jlt.2015.2474130 fatcat:kziroacalfc3rig3sfo3dd3ydy