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INvestigating SDN Programmability ImpRovING optical South- and North- bound Interfaces

Periodic Reporting for period 1 - INSPIRING-SNI (INvestigating SDN Programmability ImpRovING optical South- and North- bound Interfaces)

Reporting period: 2018-03-01 to 2020-02-29

Population needs for Internet connectivity rely on carrier networks currently challenged by the ever-increasing network complexity, traffic volume, and dynamicity. In this challenging context, Software Defined Networking (SDN) has entered the networking scene as an enabling technology that brings programmability to the network infrastructure. SDN decouples the forwarding data-plane actions commonly performed by switches (e.g. Ethernet or optical devices) from the logic control-plane decisions through application programming interfaces (APIs). In turn, the variety of SDN controllers governing different network segments and interfaces for control and management endangers actual carrier-grade SDN deployments.

INvestigating SDN Programmability ImpRovING optical South- and North- bound Interfaces (INSPIRING-SNI) aims to enhance programmability in SDN ecosystems addressing two critical aspects. First, INSPIRING-SNI will control, manage and operate technology diverse environments through the SouthBound Interface (SBI) relying on innovative industry-driven standardization initiatives such as OpenROADM and the expertise of Dr. Garrich in experimental SDN applications for optical networks. Second, INSPIRING-SNI will develop an optimization-as-a-service (OaaS) framework for dynamic optimisation of multilayer backbone/metro networks (IP over optical) jointly with metro/access segments via the NorthBound Interface (NBI), greatly widening Dr. Garrich's background and empowering his career perspectives. The OaaS framework will be based on the open-source network planning tool Net2Plan, developed within the host group, that is receiving a growing international attention and funding from industry and academia. INSPIRING-SNI will include a strategic inter-sectorial secondment at TID to experimentally validate the SBI and NBI proposals and to provide a realistic perspective on telecom operator needs and challenges, hence ensuring the applicability of the obtained results to society.
Up to date, INSPIRING-SNI has produced:
- One tutorial talk at Optical Fiber Communications Conference and Exhibition (OFC) in 2018.
- Two demonstrations (showcased in the conference event) at OFC and one at European Conference on Optical Communication (ECOC).
- One Journal of Lightwave Technology (JLT) publication.
- Three invited talks at International Conference on Transparent Optical Networks (ICTON).
- Three regular papers: Two at European Conference on Networks and Communications (EuCNC), and one at ECOC.
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Current work includes:
- One demonstration submitted to OFC 2020.
- Two JLT papers submitted.
Next steps include:
- One invited talk at ONDM.
- One (and an additional one under consideration) invited talk(s) for ICTON 2020.
INSPIRING-SNI has advanced the state of the art with the proposal of the innovative concept of Network Optimization as a Service: an approach that exploits NBI of SDN controllers suitable for a variety of optimization needs for telecommunications infrastructure. Additionally, INSPIRING-SNI has reviewed and used several approaches for the interaction between SDN network controllers and data-plane elements.
In parallel, techno-economic studies carried out within INSPIRING-SNI have assessed the potential savings in CAPEX and OPEX of the proposed solutions in carrier-grade multi-layer network infrastructures.