Combining circuit and packet switching using a large port-count optical cross-connect for data center networks |
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Authors: | Qirui Huang Yong-Kee Yeo Luying Zhou |
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Institution: | 1. Department of Structural Engineering, University of Calabria, Cosenza, Italy;2. Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Italy;1. Institute for Materials Simulation, Department of Materials Science, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Dr.-Mack-Str. 77, 90762 Fürth, Germany;2. Institute for Applied and Numerical Mathematics, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76128 Karlsruhe, Germany;1. Laboratory of Advanced Porous Materials, School of Chemistry and Chemical Engineering, Anhui University, No. 111, Jiulong Road, Hefei 230601, PR China;2. School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, PR China |
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Abstract: | The exponential increase in the data center network traffic has posed new challenges for achieving high throughput, low latency and energy consumption. To address these challenges, this paper presents a novel scheme that combines optical circuit and packet switching technologies together in a single optical cross-connect for data center networks. By utilizing fast tunable linecards and parallel array waveguide grating routers, the optical cross-connect can offer low latency, large scalability and high throughput in datacenter networks. A scheduling technique is designed to simultaneously accommodate circuit switching and packet switching in the optical cross-connect. The physical performance of this optical cross-connect in circuit and packet switching modes is investigated by experiments. In addition, the network performance of the optical cross-connect is evaluated through simulations under a mixed circuit/packet-switched traffic pattern. Results show that the network performance of the optical cross-connect does not degrade significantly with an increase in the number of racks, but it is affected by the circuit-switched traffic proportion. |
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