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The selection of virtualized network functions (VNFs) in service provisioning is a critical issue in inter-datacenter elastic optical networks. In this paper, considering load balancing of IT and spectrum resources, we propose two joint balancingfactors, i.e., Global Balancing factor (GB-factor) and Local Balancing factor (LB-factor) for VNFs selection. Then a Joint-Optimization Selection (JOS) algorithm...
In this paper, we set up a model of multi-tenant fairness in data center networks with flexi-grid optical networking and define the fair sharing degree (FSD) as an effective measurement of fairness. A novel max fairness (MF) scheme is proposed to ensure the fairness and minimum bandwidth of tenants. Numeric results demonstrate that the MF scheme achieves 67%–88% FSD reduction and a better stability...
This paper proposes joint frequency and time domain optimization of static scheduling for advance reservation (AR) requests in elastic optical networks (EONs). We formulate the problem as an integer linear program (ILP) and then propose two scheduling schemes. Simulation results show that compared with ILP, our scheme can achieve the same performance in terms of spectrum utilization with efficient...
In this paper, the problem of routing, core, and spectrum assignment (RCSA) for advance reservation (AR) and immediate reservation (IR) requests is studied in spatial division multiplexing enabled elastic optical networks (SDM-EONs) with multi-core fibers (MCFs). As lightpaths are set up and torn down, fragmentations may occur in both spectrum and time dimensions in SDM-EONs. To measure these fragmentations,...
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