Open and Programmable Metro Networks

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

doi:10.1364/ofc.2016.th1a.7

Cited by 20 publications

(19 citation statements)

References 2 publications

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“…The use of atomic functions increase the flexibility with which resources can be allocated. The atomic-function concept is similar to the "disaggregation" concept proposed for optical transport networks [70], [71] and server equipment [72]. With disaggregation, hardware is grouped into resource pools [73].…”

Section: Atomic Functions and Disaggregationmentioning

confidence: 99%

Network Function Virtualization: A Survey

Veeraraghavan

Sato

Buchanan

et al. 2017

IEICE Trans. Commun.

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SUMMARYThe objectives of this survey are to provide an in-depth coverage of a few selected research papers that have made significant contributions to the development of Network Function Virtualization (NFV), and to provide readers insights into the key advantages and disadvantages of NFV and Software Defined Networks (SDN) when compared to traditional networks. The research papers covered are classified into four categories: NFV Infrastructure (NFVI), Network Functions (NFs), Management And Network Orchestration (MANO), and service chaining. The NFVI papers describe "framework" software that implement common functions, such as dynamic scaling and load balancing, required by NF developers. Papers on NFs are classified as offering solutions for software switches or middleboxes. MANO papers covered in this survey are primarily on resource allocation (virtual network embedding), which is an orchestrator function. Finally, service chaining papers that offer examples and extensions are reviewed. Our conclusions are that with the current level of investment in NFV from cloud and Internet service providers, the promised cost savings are likely to be realized, though many challenges remain.

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Section: Atomic Functions and Disaggregationmentioning

confidence: 99%

Network Function Virtualization: A Survey

Veeraraghavan

Sato

Buchanan

et al. 2017

IEICE Trans. Commun.

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“…Hence, (5G and beyond) metro networks are expected to achieve specific targets, such as high data rate, ultra-low latency, ultra-reliable communication, low energy consumption and a reduction in capital expenditure (CAPEX) and operational expenditure (OPEX). In this sense, network disaggregation is gaining attention and influence as a way to allow lowering the cost of equipment and the power consumption, while increasing the system/network flexibility and breaking with traditional/legacy closed systems based on a set of vendor proprietary implementation [3]- [5]. In fact, different degrees of disaggregation at the optical networking layer are envisioned [4]: (i) partial disaggregation, (ii) full disaggregation based on white boxes, and (iii) full disaggregation based on bare metal blades.…”

Section: Introductionmentioning

confidence: 99%

SDN-Enabled Sliceable Transceivers in Disaggregated Optical Networks

Nadal

Fàbrega

Moreolo

et al. 2019

J. Lightwave Technol.

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We design and implement programmable (SDNenabled) sliceable bandwidth/bitrate variable transceivers (S-BVTs) based on multicarrier modulation (MCM) with direct detection (DD), tailored for disaggregated metro networks. A first level of disaggregation is assessed by considering an S-BVT architecture composed of a set of white box bandwidth/bit rate variable transceivers (BVTs) from multiple manufaturers/providers. An OpenConfig vendor-neutral model is adopted for the implementation of the SDN agents that configure the S-BVTs according to the network requirements/targets. Additionally, a fully disaggregated metro network is envisioned by considering a fixed/flexi-grid dense wavelength division multiplexing (DWDM) network with white box ROADM/OXC nodes. The impact of the filter narrowing effect is assessed considering different network node architectures based on either flexible wavelength selective switches (WSSes) or arrayed waveguide gratings (AWGs). Thanks to the transceiver inherent modularity, flexibility and bit rate variability, up to 8 network nodes can be traversed ensuring a target capacity of 50 Gb/s per slice at a 4.62 • 10 −3 BER. Index Terms-Sliceable bandwith/bitrate variable transceiver (S-BVT), wavelength selective switch (WSS), filter narrowing effect, software defined networking (SDN), disaggregation, optical metro networks.

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“…Novel node architectures based on the "whitebox" concept, including "distributed DC" capabilities, i.e., using disaggregated hardware in a vendor-neutral approach and having local processing and storage resources, is highly promising for integrating commodity hardware with telecom network elements. In the target architecture of Central Office Re-architected as a Datacenter (CORD) [3] shown in Figure 1, it includes a collection of commodity servers interconnected by a fabric constructed from electrical whitebox switches. The switching fabric is organized in a leaf and spine topology to optimize for traffic flowing east to west between the access network that connects customers to the Central Office and the upstream links that connect the Central Office to the operator's core network.…”

Section: Introductionmentioning

confidence: 99%

“…2017, 7, 865 2 of 14 infrastructures should be sustainable as the infrastructure scales with data rate and network elements, as well as computing and storage resources. Several programmable optical metro node architectures based on simplified, flexible, and costefficient optical switching and transmission technology, with high capacity and faster network reconfiguration and with efficient exploitation of the available optical spectrum, have been currently investigated [2][3][4][5][6]. Novel node architectures based on the "whitebox" concept, including "distributed DC" capabilities, i.e., using disaggregated hardware in a vendor-neutral approach and having local processing and storage resources, is highly promising for integrating commodity hardware with telecom network elements.…”

Section: Introductionmentioning

confidence: 99%

SOA Based Photonic Integrated WDM Cross-Connects for Optical Metro-Access Networks

et al. 2017

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We present a novel optical metro node architecture that exploits the Wavelength Division Multiplexing (WDM) optical cross-connect nodes for interconnecting network elements, as well as computing and storage resources. The photonic WDM cross-connect node based on semiconductor optical amplifiers (SOA) allows switching data signals in wavelength, space, and time for fully exploiting statistical multiplexing. The advantages of using an SOA to realize the WDM cross-connect switch in terms of transparency, switching speed, photonic integrated amplification for loss-less operation, and gain equalization are verified experimentally. The experimental assessment of a 4 × 4 photonic integrated WDM cross-connect confirmed the capability of the cross-connect chip to switch the WDM signal in space and wavelength. Experimental results show lossless operation, low cross-talk <−30 dB, and dynamically switch within few nanoseconds. Moreover, the operation of the cross-connect switch with multiple WDM channels and diverse modulation formats is also investigated and reported. Error-free operation with less than a 2 dB power penalty for a single channel, as well as WDM input operation, has been measured for multiple 10/20/40 Gb/s NRZ-OOK, 20 Gb/s PAM4, and data-rate adaptive DMT traffic. Compensation of the losses indicates that the modular architecture could scale to a larger number of ports.

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Open and Programmable Metro Networks

Cited by 20 publications

References 2 publications

Network Function Virtualization: A Survey

Network Function Virtualization: A Survey

SDN-Enabled Sliceable Transceivers in Disaggregated Optical Networks

SOA Based Photonic Integrated WDM Cross-Connects for Optical Metro-Access Networks

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