研究目的
To address protection in SDM-EONs including inter-core crosstalk by introducing three algorithms for 100% protection from single failures.
研究成果
The proposed algorithms (FIPPMC, SBPPMC, MIFMC) effectively provide 100% protection against single failures in SDM-EONs, with performance varying based on network connectivity. The multigraph representation reduces blocking and fragmentation, but p-cycle-based algorithms consume more resources. Future work should explore spectrum overlap and multipath routing for further improvements.
研究不足
The study is limited to simulation-based evaluation and does not include real-world implementation or physical testing. It focuses on single failures and specific topologies, potentially not generalizing to all network configurations. The algorithms may have high computational complexity in large networks.
1：Experimental Design and Method Selection:
The study uses simulation-based experiments to evaluate three novel algorithms (FIPPMC, SBPPMC, MIFMC) for routing, spectrum, and core assignment in SDM-EONs with protection against single failures. The algorithms are based on a multigraph representation of the spectrum to ensure contiguity and consider inter-core crosstalk.
2：Sample Selection and Data Sources:
Simulation experiments are conducted using the FlexGridSim simulator. Connection requests are uniformly distributed among all node pairs, with loads varied from 25 to 500 erlangs, and each simulation involves 100,000 connection requests. Requests follow a Poisson process.
3：List of Experimental Equipment and Materials:
The simulations use multicore fibers (MCFs) with 7 cores, each divided into 320 slots. Topologies include Pan-European (28 nodes, 82 links), USA (24 nodes, 43 links), NSF (16 nodes, 25 links), and Cesnet (12 nodes, 19 links).
4：Experimental Procedures and Operational Workflow:
For each algorithm, the multigraph is transformed into multiple graphs to represent spectrum availability. Dijkstra's and Suurballe's algorithms are used for path and cycle computations. Performance metrics (bandwidth blocking ratio, crosstalk per slot, fragmentation ratio, energy efficiency) are measured under varying loads.
5：Data Analysis Methods:
Data is analyzed using confidence intervals derived from independent replications with a 95% confidence level. At least 10 replications are performed for each scenario, and results are compared to existing algorithms (CaP-DPP and SSCA).
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