Inter-Channel Crosstalk Compensation for Time-Frequency Packing Systems

  • Aref V.
  • Buchali F.
  • Buelow H.
  • Dischler R.
  • Hu Q.
  • Idler W.
  • Schmalen L.

We compensate the inter-channel interference (ICI) in time-frequency packing signal using cross-channel equalizer in combination with joint DSP. The experiment shows 1.2 dB gain in OSNR penalty and 37% increase in reach with ICI compensation.

Packaged SOA with Ultrawide-band, Large Output Power and Low Noise Figure

  • Verdier A.

We demonstrate ultra-wideband operation of a SOA module, based on the polarization diversity scheme. NF below 6 dB, Psat above 20 dBm, and gain over 15.5 dB are obtained on 120 nm

Towards a Scalable User-Space QUIC Network Stack

  • Duan Yufeng
  • Gallo M.
  • Giaccone P.
  • Laufer R.
  • Traverso S.

The introduction of kernel-bypass techniques that enable high-speed packet processing has fostered the development of scalable servers and middleboxes through the introduction of customized user-space network stacks. Despite their diffusion, such solutions are tailored to a single application or network protocol preventing their wide deployment. Motivated by the introduction of ...

Risk Thinking for Cloud-Based Application Services

  • Bauer E.

Powerpoint overview of "Risk Thinking for Cloud-Based Application Services" book by Eric Bauer, published by CRC Press, April 2017

From Documents to Dialogues: Programming Technology for the Conversational Web

  • Van Cutsem T.

A paradigm shift is taking place on the Web. Users spend less and less time using browsers and more and more time using instant messaging applications. While originally designed to facilitate communication among humans, these platforms now position themselves as "next-generation browsers" to interact with services and businesses. They do ...

MIMO Equalization for Multi-Gbit/s Communication Under Channel Variability

  • D. Vande Ginste
  • Guenach M.
  • Jacobs L.
  • Jelle Bailleul
  • Marc Moeneclae
  • P. Manfredi

Multiple-input multiple-output (MIMO) equalization at the transmitter and/or receiver has been shown to enable multi-Gbit/s communication over lowcost electrical interconnects. Because of the high operating frequencies, however, the interconnects become susceptible to manufacturing tolerances and the equalization filters must be adjusted to the specific channel realization to achieve optimal performance. ...

On the Fundamental Characteristics of Ultra-Dense Small Cell Net

  • Claussen H.
  • Lopez-Perez D.
  • Ming Ding
  • Mohamed Ali Kaafarx

In order to cope with the forecasted 1000x increase in wireless capacity demands by 2030, network operators tend to aggressively densify the network infrastructure, so as to reuse the spectrum as much as possible. However, it is important to realise that these new ultra-dense small cell networks are fundamentally different ...

A Theory of Nonlinear Signal-Noise Interactions in Wavelength Division Multiplexed Coherent Systems

  • Ghazisaeidi A.

a general theory of nonlinear signal-noise interactions for wavelength division multiplexed fiber-optic coherent transmission systems is presented. This theory is based on the regular perturbation treatment of the nonlinear Schrodinger equation, which governs the wave propagation in the optical fiber, and is exact up to the first order in the ...

1.2 Tbit/s (64 QAM at 100 GBaud) transmission over 300 km

  • Altenhain L.
  • Buchali F.
  • Dümler U.
  • Engenhardt K.
  • Eriksson T.
  • Idler W.
  • Möller M.
  • Schmalen L.
  • Schmid R.
  • Schuh K.
  • Templ W.

We demonstrate dual polarization 64 QAM transmission at 100 GBaud over 300 km ultra large effective area fiber. The achieved line rate of 1.2 Tbit/s is the highest line rate achieved without OTDM.

Algorithm for IoT service characterization: performance evaluation

  • Ammar N.
  • Le Pallec .
  • Noirie L.

With the explosion of the number and variety of connected objects, it is necessary to define a system of recommendation of IoT services to the users so that they better use the connected objects that are at their disposal. The purpose of this recommendation system is to provide the user ...

Non-Intrusive and Efficient Detection of Latent Reliability Bottlenecks within Cloud Storage Services

  • Chen R.
  • Zhai E.

Large-scale storage systems, common in cloud computing, employ replication techniques to ensure reliability. Along with the increasing scale of modern cloud platforms, however, replica servers may inadvertently depend on deep, common infrastructure components, e.g., switches and DNS servers. Such unexpected common dependencies are defined as Latent Reliability Bottlenecks (or LRBs), ...

Optimal Channel Allocation with Scalable TTI for Heterogeneous Services

  • Fountoulakis E.
  • Liao Q.
  • Pappas N.
  • Suryaprakash V.
  • Yuan D.

The rapid growth in the number of varieties of connected devices requires 5G wireless systems to cope with a very heterogeneous traffic mix. As a consequence, the use of a fixed Transmission Time Interval (TTI) during transmission is not necessarily the most efficacious method for the simultaneous service of such ...

Multi-Dimensional Resource Management in 5G Networks

  • Decarreau G.
  • Ewe L.
  • Liao Q.
  • Mwanje S.
  • Naseer-Ul-Islam M.
  • Sanneck H.

Increased demand for mobile broadband services is driving densification of mobile networks through 4G small cells while spectrum scarcity demands deployment in newer bands including shared unlicensed spectrum. Concurrently, new requirements from vertical industries drive the development of 5G, envisioned not only as a new Radio Access Technology (RAT) but ...

RobOps: Robust control for cloud services

  • Arjona Aroca J.
  • Chen C.
  • Lugones D.

Performing online automated resource provisioning for services in the cloud needs to be robust in order to fulfil minimum Service Level Objectives (SLOs). Resource provisioning is mostly carried out by solutions based on scaling policies, being its probably most popular example Amazon Web Services AutoScaling. However, the validity of this ...

Deep Learning through Evolution: A Hybrid Approach to Scheduling in a Dynamic Environment

  • Claussen H.
  • Kucera S.

Genetic Algorithms (GAs) have been shown to be a very effective optimisation tool on a wide variety of problems. However the method is not without its drawbacks. GAs require time to run, and evolve a bespoke solution to the desired problem in real time. This requirement can prove to be ...

5G Industry4.0 Application

  • Heimpel H.
  • Koppenborg J.
  • Kruse J.

With the fourth industrial revolution the implementation of a reliable communication layer capable to deal with a significant increase of the number of assets, volume and variety of information will become fundamental. The reaction times in future manufacturing system has to be very short for time-critical applications like Safety. 5G ...

MPTCP meets FEC: Supporting Latency-Sensitive Applications over Heterogeneous Networks

  • Claussen H.
  • Kucera S.
  • Ozgu Alay
  • Simone Ferlin

TCP has gone through numerous updates over the past years to provide performance enhancement under diverse network conditions. However, with respect to losses, little can be achieved with legacy TCP recovery mechanisms. Both Fast Retransmission (FR) and Retransmission Timeout (RTO) take at least one extra RTT to perform and this ...

Software Robustness Tutorial Testing of Complex Telecommunications Solutions

  • Asthana A.
  • Sinclair V.

Software Robustness Tutorial Testing of telecommunications networks.

Rare Event Optical Simulations Using Importance Sampling and an Optimized 1/f Sampler with Replica Exchange

  • Kakande J.

We describe our framework for accelerating simulations via a combination of importance-sampling and 1/f sampling. We use importance-sampling to scan the output range, followed by an optimized 1/f sampler that converges to the output distribution.

Inter-Channel Crosstalk Cancellation for WDM Time-Frequency Packing System

  • Aref V.
  • Buchali F.
  • Buelow H.
  • Dischler R.
  • Hu Q.
  • Idler W.
  • Schmalen L.

We apply a joint DSP for inter-channel crosstalk compensation in WDM time-frequency packing systems. The OSNR penalty is improved at most by 2 dB with the inter-channel crosstalk cancellation.