Abstract
The present paper addresses future network architectures considered for Fixed Mobile Convergence, where users can access resources transparently either through fixed access technologies or through the mobile RAN. Optical technologies rely on Wavelength Division Multiplexing (WDM) to meet continuously growing bandwidth demands. However, although in the core network optical circuit switching may efficiently support huge traffic aggregates, closer to the access, in future Metropolitan Area Networks (MAN), it is necessary to provide a finer granularity, and a dynamical bandwidth control, to very heterogeneous traffic demands. This is supported by Optical Packet Switching relying on WDM slotted Add/Drop Multiplexing (WSADM). A flow-based transfer mode, compatible with SDN control is first specified, and applied to bidirectional MAN rings. This mode is shown to provide several methods for supporting both local and global repair in case of failure. Mathematical models are derived to assess optical packet insertion performance and are used to illustrate how WSADM rings can support MAN performance requirements. Lastly, the impact of locating the IP edge, and Data Centres closer to the users than in legacy architectures, within the MAN is addressed.
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Acknowledgements
The work has been carried out in the framework of the N-GREEN Project (ANR-15-CE25-0009-0x), supported by the French Research Agency and also by European Union (FEDER EU000442), Brittany Region, Finistère Department and Brest Metropole in the framework of SOPHIE Photonique Program. The authors specifically thank Dominique Chiaroni and Bogdan Uscumlic from Nokia Bell Labs for their help in specifying the WSADM transfer mode.
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Gravey, A., Amar, D., Gravey, P. et al. An optical packet metro architecture for Fixed Mobile Convergence in the cloud era. Photon Netw Commun 37, 278–295 (2019). https://doi.org/10.1007/s11107-019-00831-5
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DOI: https://doi.org/10.1007/s11107-019-00831-5