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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Dynamic Service Provisioning Algorithm Based on Degree of Spectrum-Time Fragmentation of AR Requests in Elastic Optical Networks
摘要： The dynamic service provisioning of AR request in EONs is studied in this paper. A notion named Degree of Spectrum-Time Fragmentation (DSTF) is introduced, which describes the fragmentation disorder degree of two dimension resource matrix. Then the service provisioning algorithm based on DSTF is proposed. Simulation results show that the proposed algorithm reduces blocking rate and average request initial delay effectively.
关键词： advanced reservation (AR),Routing and spectrum assignment (RSA),Elastic optical network (EON)
更新于2025-09-16 10:30:52
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A Priority-Based Multiobjective Design for Routing, Spectrum, and Network Coding Assignment Problem in Network-Coding-Enabled Elastic Optical Networks
摘要： In elastic optical networks, the use of network coding (NC) represents a new dimension to further optimize spectrum efficiency, and indeed, combining NC and dedicated path protection has paved the way for achieving greater capacity efficiency, while retaining the merit of near-instantaneous recovery. In order to harness the NC benefits, a more complicated problem called routing, spectrum, and network coding assignment (RSNCA) has to be solved, and in this article, we propose a priority-based multiobjective design for the RSNCA problem aiming at maximizing the network throughput in the constrained bandwidth capacity and simultaneously minimizing the spectrum link usage for accepted demands. The multiobjective design is based on the weighting method, and we present a rigorous analysis on the impact of weight coefficients to the priority of constituent objectives. The efficacy of our design proposal is benchmarked with reference ones based on the traditional single-objective model and for both coding and non-coding approaches on various realistic topologies. It is highlighted that the application of NC brings about considerable throughput enhancement, and furthermore, the multiobjective RSNCA design is highly more efficient than the single-objective RSNCA, as up to more than 50% saving on spectrum link usage could be attained.
关键词： routing and spectrum assignment (RSA),elastic optical networks,network coding (NC),intelligent optical networks,integer linear programming,multiobjective optimization,Dedicated protection
更新于2025-09-16 10:30:52