This paper focus on the routing, modulationlevel and spectrumallocation (RMLSA) problem in the next generation datacentre networks, which own the advantages of both Elastic Optical Networks (EON) and Software Define...
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This paper focus on the routing, modulationlevel and spectrumallocation (RMLSA) problem in the next generation datacentre networks, which own the advantages of both Elastic Optical Networks (EON) and Software Defined Networking (SDN). We proposes an Integer Linear Programming (ILP) model for this problem. Simulation results show the ILP model achieves an outstanding load balancing performance.
We propose and investigate a subtree scheme for all-optical multicast routing, modulationlevel and spectrumallocation (AOM-RMSA) in elastic optical networks. A multicast request is accommodated by several light-tree...
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We propose and investigate a subtree scheme for all-optical multicast routing, modulationlevel and spectrumallocation (AOM-RMSA) in elastic optical networks. A multicast request is accommodated by several light-trees and each light-tree covers only a part of the destination set. We assume that all nodes are multicast capable and investigate the subtree scheme over the single light-tree scheme for the AOM-RMSA problem under both static and dynamic traffic scenarios. In the static scenario, we formulate an integer linear programming model to obtain the optimal solution. Then, we propose two time-efficient heuristic algorithms that construct subtrees according to the link-sharing ratio between the paths from source to two distinct destinations. The proposed algorithms improve the spectrum utilization by building subtrees that have smaller tree-spanning size and adopt higher levelmodulation formats. They have also effectively reduced the blocking probability compared to single light-tree schemes.
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