An artificial neural network (ANN) based transfer learning model is built for quality of transmission (QoT) prediction in optical systems feasible with different modulation formats. Knowledge learned from one system can be transferred to a similar by adjusting weights ANN hidden layers few additional training samples, where highly related information both integrated and redundant discarded. Homogeneous heterogeneous structures are implemented achieve accurate Q-factor-based QoT low...

Quality of transmission prediction for real-time mixed line-rate systems is realized using artificial neural network based transfer learning with SDN orchestrating. 0.42 dB accuracy achieved a 1000 to 20 reduction in training samples.

Machine learning based modelling of Erbium-Doped Fiber Amplifiers (EDFA) is used to determine wavelength dependent gain for use in optical transmission systems, and achieves root mean square error (RMSE) 0.08, 0.18, 0.27 dB under input ranges +/- 3, 6, 9 dB.

Recent advances in software and hardware greatly improve the multi-layer control management of reconfigurable optical add-drop multiplexer (ROADM) systems facilitating wavelength switching. However, ensuring stable performance reliable quality transmission (QoT) remain difficult problems for dynamic operation. Optical power dynamics that arise from a variety physical effects amplifiers fiber complicate predictions these systems. We present deep-neural-network-based machine learning method to...

An LSTM network is developed to predict BBU pool traffic in 5G C-RAN ROADM networks. throughput improvement and resource savings are observed with reallocation by reconfiguring the optical 30 minutes advance.

Optical transmission systems exist ubiquitously in data center, access, metro and long-haul networks, are divided into different autonomous domains based on carrier ownership, network equipment manufacturers, geographical location, etc. Software-defined Internet exchange methods have been proposed to solve the long-standing problem of inter-domain routing enable control flexibility layer-3 software-defined networking (SDN) has also introduced optical networks much progress made enhance...

Greater network flexibility through software defined networking and the growth of high bandwidth services are motivating faster service provisioning capacity management in optical layer. These functionalities require increased along with rapid reconfiguration resources. Recent advances hardware can enable a dramatic reduction wavelength times circuit switched networks. To support such operations, it is imperative to reconfigure without causing drop quality existing users. Therefore, we...

We experimentally demonstrate self-adaptive coded 5×100 Gb/s WDM polarization multiplexed 16 quadrature amplitude modulation transmission over a 100 km fiber link, which is enabled by real-time control plane. The optical signal-to-noise ratio (OSNR) measured using an performance monitoring device. OSNR measurement processed and fed back plane logic messaging to the transmitter side for code adaptation, where binary data are adaptively encoded with three types of low-density parity-check...

We demonstrate multipath routing and wavelength re-assignment in OpenFlow-enabled packet-circuit network, aware of links' bandwidth utilization, applications' protocol, quality transmission. Applications are re-routed under traffic congestion wavelengths re-assigned physical impairments.

BBU pool allocation and selection are jointly optimized for maximizing wireless traffic capacity while minimizing wavelength resource occupation in optical networks. Numerical results show optimal locations under different patterns network capacities.

End-to-end, impairment-aware wavelength path provisioning is experimentally realized in a multi-domain network using transparent software-defined exchange (tSDX) with real-time OSNR monitoring as an SLA guarantee for 100Gbps PM-QPSK DWDM transmission.

Wavelength dependent gain is a critical parameter in erbium-doped fiber amplifiers and the primary determinant of channel power divergence excursions optical transmission systems, each which varies with loading wavelength-division-multiplexed (WDM) systems. In an system, measurements wavelength between two locations can be used to obtain estimates that occur circuit switching. Non-intrusive sampling just 10% WDM positions using weak probe signals achieves less than 0.15 dB error for spectrum...

Using a dual-wavelength source, single optical signal is distributed over two wavelengths. This approach used to reduce power excursions due circuit switching in ROADM systems. In multi-hop transmission system with 100Gbps PM-QPSK signals switched five ROADMs and 265 km of mode fiber (SMF), are kept within ± 0.2 dB using sources. A cumulative distribution function (CDF) channel generated from measurements 100 random loadings for four different loading plans. sources, up 6 reduced below 1.5...

While new SDN control planes promise to provide faster and more dynamic provisioning of optical paths, mis-estimation signal noise ratio (OSNR) is still an issue that reduces the amount capacity available in practice allocate data paths. Typically, additional margins are applied estimation OSNR for given however, absence detailed knowledge on gain function EDFAs, these equally all leading network under-utilisation. In this paper we show effect over a simulated based Telefonica Spanish...

We demonstrate the first software-defined dynamic resource allocation of OFDM subcarriers and modulation formats using OpenFlow protocol real-time DSP. Dynamic for HD video text is achieved 20km SSMF transmission.

OpenFlow, as a unified operator-friendly manageable network control approach, has benefits of supporting the convergence electronic packet and optical circuit networks well quality-of-transmission (QoT) awareness. We experimentally present QoT-awareness in converged OpenFlow with (i) QoT-aware wavelength reassignment (ii) path re-routing if QoT is below requirement. The experimental work validates efficient networking approach provides key direction for next generation software defined networks.

Optical power dynamics that result from wavelength switching and routing require system tuning will impact the performance of software defined networking (SDN) methods in physical layer. We review constraints on SDN functions due to optical dynamics.

Hysteresis-based margin-allocation for adaptive coding is experimentally investigated against PDL-induced OSNR fluctuations in a SDN-enabled multi-domain optical network. Up to 90% network outage reduction can be observed under different margins.

We propose a globally traffic-aware passband assignment algorithm to satisfy signal integrity requirements in elastic optical networks. implement our solution an SDN-enabled testbed and demonstrate successful performance with DQPSK OFDM modulation formats.

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text S. Zhu, W. Mo, D. C. Kilper, A. P. Anthur, and L. Barry, "Dual Laser Switching for Dynamic Wavelength Operation in Amplified Optical Transmission," Fiber Communication Conference, OSA Technical Digest (online) (Optica Publishing Group, 2017), paper Th2A.44. Export BibTex Endnote (RIS) HTML Plain alert Save article

Proactive and nondisruptive channel probing is investigated for the measurement of power, amplifier gain, optical signal-to-noise ratio (OSNR) without disrupting established wavelength-division multiplexed channels. Using a probe signal over three-span link, wavelength switching-induced power excursions are predicted to be within ±0.2 dB, OSNR as high 20 dB accurately measured with maximum 0.5 error.

An ensemble learning algorithm is applied to enhance filtering tolerance of cascaded WSSs in open ROADM environment demonstrate ~0.8dB Q-factor improvement over MLSE after transmitting 3200km with 16 ROADMs.

We demonstrate for the first time an SDN-based OFDM elastic optical network with pilot-tone assisted distributed control. Improvement in spectral efficiency and a fast reconfiguration of 30ms have been achieved our experiment.