SDN Control of Packet-over-Optical Networks

Parulkar, Guru; Tofigh, Tom; Leenheer, Marc De

doi:10.1364/ofc.2015.w1g.4

Cited by 8 publications

(1 citation statement)

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“…Some initial efforts are being made by ONFTWG as well as other emerging organizations for standardization. In [40], [41], authors have presented an ONOS control method using a disaggregated transport network.…”

Section: Relevant Workmentioning

confidence: 99%

Dynamic LightPath Allocation in WDM Networks Using an SDN Controller

Qureshi

Braun

2021

IEEE Access

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Core wavelength division multiplexed (WDM) networks are widely used to provide fixed physical connectivity and bandwidth to the logically connected upper electronic layer devices using optical signals. However, growing demands for bandwidth-intensive applications and cloud-based services push optical networks carriers' to provide scalable and flexible services dynamically. Software defined networking (SDN) has the potential to program electronic layers by dynamically controlling and managing network resources using SDN controller applications. SDN's on-demand characteristics combined with the optical circuit-switching can enable optical network service providers to customize their service provisioning dynamically to the user's requirements. They enable fast provision of new services, and minimize under-utilization of resources. In this paper, a model is proposed to bring the dynamic allocation of resources which is a layer 2+ functionality, to the WDM layer using SDN. A middle-ware application based on SDN and OpenFlow for dynamic switching and provisioning of optical service is presented. The application abstracts the optical layer's connectivity, also accounting for the switching constraints. Details of the model's implementation are discussed considering classically used equipment and its performance in terms of CPU and memory utilization, topology emulation time, and latency is evaluated. Finally, the application is tested with a Cisco layer one switch. Performance results show that the latency doubles when increasing the number of fibers of an optical cross connect from 5 to 7 and keeping wavelengths equal to 8, with Clos fabric topology.INDEX TERMS Wavelength division multiplexed network (WDM), Software Defined Networking (SDN), OpenFlow protocol, dynamic path allocation, optical cross connect (OXC).

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Section: Relevant Workmentioning

confidence: 99%