Fully SDN-enabled all-optical architecture for data center virtualization with time and space multiplexing

K. Kondepu, C. Jackson, Y. Ou, A. Beldachi, A. Pagès, F. Agraz, F. Moscatelli, W. Miao, V. Kamchevska, N. Calabretta, G. Landi, S. Spadaro, S. Yan, D. Simeonidou, R. Nejabati

Research output: Contribution to journalArticle (Academic Journal)peer-review

17 Citations (Scopus)
359 Downloads (Pure)


Virtual data center (VDC) solutions provide an environment that is able to quickly scale up, and where virtual machines and network resources can be quickly added on-demand through self-service procedures. VDC providers must support multiple simultaneous tenants with isolated networks on the same physical substrate. The provider must make efficient use of its available physical resources while providing high-bandwidth and low-latency connections to tenants with a variety of VDC configurations. This paper utilizes state-of-the-art optical network elements to provide high-bandwidth optical interconnections and develop a VDC architecture to slice the network and the compute resources dynamically, to efficiently divide the physical network between tenants. We present a data center virtualization architecture with a softwaredefined networking controlled all-optical data plane combining optical circuit switching and a time-shared optical network. Developed network orchestration dynamically translates and provisions VDCs requests onto the optical physical layer. The experimental results show the provisioned bandwidth can be varied by adjusting the number of time slots allocated in the time-division multiplexing (TDM) network. These results lead to recommendations for provisioning TDM connections with different performance characteristics. Moreover, application-level optical switch reconfiguration time is also evaluated to fully understand the impact on application performance in VDC provision. The experimental demonstration confirmed that the developed VDC approach introduces negligible delay and complexity on the network side.

Original languageEnglish
Pages (from-to)B90-B101
Number of pages12
JournalIEEE/OSA Journal of Optical Communications and Networking
Issue number7
Early online date7 Jun 2018
Publication statusPublished - 1 Jul 2018


  • Multi-core fiber
  • Multiplexing
  • Optical circuit switching
  • Software defined networking
  • Time shared optical network
  • Virtual data center


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