Scalable and multi-service passive optical access infrastructure using variable optical splitters

In this paper, we address the problem of providing survivability in elastic optical networks (EONs). EONs use fine granular frequency slots or flexible grids, when compared to the conventional fixed grid networks and therefore utilize the frequency spectrum efficiently. For providing survivability in EONs, we consider a recently proposed survivability method for conventional fixed grid networks, known as pre-configured backup protection with sharing (PBPS), because of its benefits over the traditional survivability approaches such as dedicated and shared protection. In PBPS, backup paths can be preconfigured and at the same time they can share resources. Therefore, both short recovery time and efficient resource usage can be achieved. We find that the existing switch architectures do not support both PBPS and EONs. Specifically, we identify and illustrate that, if a switch architecture is not carefully designed, several key problems/issues might arise in certain scenarios. Such problems include unnecessary resource consumption, inability of using existing free resources, and incapability of sharing backup paths. These problems appear when PBPS is adopted in EONs and they do not arise in fixed grid networks. In this paper, we propose new switch architectures which support both PBPS and EONs. Particularly, we illustrate that, our switch architectures avoid the specific problems/issues mentioned above. Therefore, our switch architectures support using resources more efficiently and reducing blocking of requests.

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“…We use the 1x2 VOS component presented in [15][16][17]. The self-latching VOS is based on magneto-optical technology.…”

Section: B Switch Architecture For Pbps In Eons Using Vossmentioning

confidence: 99%

Efficient switch architectures for pre-configured backup protection with sharing in elastic optical networks

Satkunarajah

Ratnam

Ragel

2014

7th International Conference on Information and Automation for Sustainability

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“…Direct Photovoltaic Power option is a promising solution to power a small dimension QPAR. However, for large dimension QPARs, this option requires a high instantaneous power from the PPC [3] or multiple PPCs with multiple wavelengths [4], thus lacking scalability. To overcome these limitations, there is another option, storing the energy in a supercapacitor, which has been proposed to power switching units in metro or access networks, for example, an electrooptic 2 × 2 switch [5].…”

Section: Introductionmentioning

confidence: 99%

Remotely Powered and Reconfigured Quasi-Passive Reconfigurable Nodes for Optical Access Networks

Shen

Jin

et al. 2016

Journal of Electrical and Computer Engineering

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Quasi-Passive Reconfigurable (QPAR) nodes have been proposed to provide flexible power/wavelength allocation in optical access networks. QPAR only consumes power during reconfiguration, which is remotely transmitted from the central office, thus maintaining the passive nature of the network. In this paper, a QPAR control circuit is designed, and a remotely powered and reconfigured1×2×2QPAR (i.e., one wavelength, two power levels, and two output ports) with a 0.1 F/5 V supercapacitor (SC) remotely charged by a1×8photodiode array is experimentally demonstrated. The charged SC can power the QPAR for at least 6 s with 24 consecutive reconfigurations (200 ms each) or two reconfigurations within a maximum period of 40 hours, before the SC needs to be recharged. In addition, the demonstrated QPAR remote power scheme is compared with the previously proposed Direct Photovoltaic Power option both theoretically and experimentally. Results show that the SC based remote power mechanism is capable of driving a large number of reconfigurations simultaneously and it is better for large dimension QPARs.

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“…One roadblock that prevents the introduction of flexible optical networking technology in this cost-sensitive segment is to retain a fully passive outside fibre plant without electrically powered or complex fieldinstallations. Up to now remotely steered optical elements such as tunable splitters have been proposed 1 and partially also demonstrated, 2,3 however, showing a high power consumption. In this work we present a fully-passive electrooptic 2x2 switching node as engine of scalable metro-access nodes and experimentally demonstrate dynamic circuit reconfigurability and latching through economic optical feeding.…”

Section: Introductionmentioning

confidence: 99%

Passive optical switching engine for flexible metro-access

Schrenk

Poppe

Stierle

et al. 2014

2014 the European Conference on Optical Communication (ECOC)

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Scalable and multi-service passive optical access infrastructure using variable optical splitters

Cited by 24 publications

References 3 publications

Efficient switch architectures for pre-configured backup protection with sharing in elastic optical networks

Efficient switch architectures for pre-configured backup protection with sharing in elastic optical networks

Remotely Powered and Reconfigured Quasi-Passive Reconfigurable Nodes for Optical Access Networks

Passive optical switching engine for flexible metro-access

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