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  • Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2011
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper OWP4
  • https://doi.org/10.1364/OFC.2011.OWP4

Scalable Control Plane architecture for Optical Flow Switched Networks

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Abstract

In OFS, users employ an off-band signaling protocol to request lightpaths for their large unscheduled bursty transactions, and the network dynamically schedules a dedicated, end-to-end lightpath for the duration (≥100mS transaction times) of the transfer avoiding collisions due to contention, Fig.1. For OFS the scheduling and network control is dynamic and when a transaction finishes, the network resources are immediately relinquished to other users. The key to high utilization of backbone wavelength channels – a precious network resource owing to the necessary use of optical amplifiers and dispersion management – is statistical multiplexing of large flows from many users in a scheduled fashion. Efficient, dynamically assigned multi-access broadcast groups can be arranged for multiple transaction durations using the node architecture. We have shown, [1,2,3,4,6], that our approach provides significant cost savings over other transport mechanism for large transactions. OFS is technically a circuit switched service. The major difference between OFS and traditional circuit switching is the fast dynamic session setup (<100mS). This presents tremendous stresses on the network control plane. Many detractors of this technology (who mostly favors IP packet switching) question the scalability of this technology. The purpose of this paper is to address all the critical problems that prevent affordable scalability and fast dynamic setup for OFS. Major attributes in our architecture that simplify network control and potentially can realize significant simplicity and cost saving are:

© 2011 Optical Society of America

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