Limits of nonlinear compensation in massive WDM systems

  • Dar R.
  • Winzer P.

We examine the maximal achievable gains of digital back-propagation (BP) in typical modern WDM systems. We show that in a fully loaded WDM environment, the potential benefit of single-channel BP is limited to ~ 0.5dB improvement in the maximal SNR, and about 1dB and 1.2dB in the case of 3 ...

A Code-Aided Expectation-Maximization Algorithm for 32 Gbaud PolDM-16QAM Transmission Nonlinear-Phase Noise Compensation

  • Buelow H.
  • Idler W.
  • Kschischang F.
  • Pan C.
  • Schmalen L.

We propose an algorithm to mitigate optical nonlinearity. It utilizes both the time correlation of nonlinearity, and a soft-decision error control code to achieve an optical signal to noise ratio gain of 0.3 dB and a launch power gain of 2 dB.

H2C: a Hierarchical Two-layer Caching Design for Networked System

  • Gallo M.
  • Lorenzo Saino
  • Perino D.

Packet-level caching is becoming increasingly important as it is exploited by several network applications today, and proposed as basic building block of future Internet architectures. This demands for high-speed caching designs that leverage heterogeneous storage technologies to scale the storage space up to TBs, and off-the-shelf general purpose hardware to ...

Fixed Access Unbundling: the past, present, and future

  • Damas F.
  • Fredricx F.
  • Kozicki B.
  • Oberle K.
  • Olaziregi N.
  • Sharpe R.

Multi-operator access over a common shared access infrastructure has in the past been investigated and deployed in the field in several forms of local loop unbundling (mainly Ethernet-level bitstream access). It enables telecommunication operators lacking wireline access infrastructure to provision services (e.g. high-speed Internet , IPTV) to customers connected to ...

Scaling Laws for Maximum Coloring of Sparse Random Geometric Graphs

  • Borst S.
  • Bradonjic M.

We examine maximum vertex coloring of random geometric graphs, in an arbitrary but fixed dimension, with a constant number of colors. Since this problem is neither scale-invariant nor smooth, the usual methodology to obtain limit laws cannot be applied. We therefore leverage different concepts based on subadditivity to establish convergence ...

55 Tb/s Transmission over Transoceanic Distances using ultra low loss fiber and low complexity perturbative nonlinear mitigation

  • Awwad E.
  • Brindel P.
  • Charlet G.
  • Ghazisaeidi A.
  • Schmalen L.
  • Simonneau C.
  • Tran P.

demonstrate 55Tb/s transmission over transoceanic distances with an average channel rate above 300Gb/s while keeping a low consumption of 226pW/bit/s for transmission line, thanks to ultra low loss fiber, advanced nonlinear mitigation technique.


  • Fernando Rosas
  • Marc Moonen
  • Rodolfo Torrea-Duran
  • Sofie Pollin
  • Tsiaflakis P.
  • Zuhaib Khan Zii Khan

The continuous growth of demand for wireless connectivity has turned bandwidth into a scarce resource that should be carefully managed. A common solution is to assign disjoint portions of the bandwidth to different users, but the portion size decreases as the number of users grows. An alternative solution is to ...

New approach to Bayesian high-dimensional linear regression

  • Jalali S.
  • Maleki A.

Consider the problem of estimating parameters Xn E Rn, generated by a stationary process, from m response variables Y m = AXn + Zm, under the assumption that the distribution of Xn is known. This is the most general version of the Bayesian linear regression problem. The lack of computationally ...

Non-Orthogonal Downlink Transmissions Using Module Multilevel Codes

  • Claussen H.
  • Fang D.
  • Zhang M.

In this paper, a new approach to non-orthogonal multiuser downlink transmission, referred to as modulo multilevel codes based multiuser superposition transmissions (MMC-MUST), is proposed, which addresses the main issues of existing solutions by 1) overcoming the challenge faced by NOMA when users have the similar channel conditions; 2) adopting the ...

Electrical and geometrical optimization for a 2DoF non-linear energy harvester

  • Frizzell R.

In this paper a non-linear model for a two degree-of-freedom (2dof) vibrational energy harvester is presented, together with its experimental validation. The device consists of two masses relatively oscillating one inside the other. The inner (lighter) mass comprises five NdFeB magnets, arranged in a Halbach configuration. The outer (heavier) mass ...

Nonlinear analysis of a two-degree-of-freedom energy harvester

  • Frizzell R.

In recent years the use of Wireless Sensor Networks (WSNs) has increased rapidly, enabled by the development of small and ultra-low power electronics. The majority of these sensors are battery powered, and this can lead to high maintenance costs when batteries have to be replaced. A practical solution to power ...

Improving End to End Energy Efficiency in Network Function Virtualization

  • Arjona Aroca J.
  • Omana Iglesias J.
  • Sridhara Rao Prasad A.

Network Function Virtualization (NFV) is a new paradigm of virtualizing the services provided by the telecom and cloud operators. NFV is one of the hottest research areas in the field of computer networking. Given one or more service deployed on the virtual machines, the goal is to find a solution ...

Analytical and Semi-Analytical Models for Nonlinear Transmission

  • Dar R.

We review recent advances in modeling nonlinear interference noise (NLIN) in WDM systems. We explore the time-domain and frequency-domain representations of NLIN and discuss techniques for evaluating its statistical properties and impact on system performance.

Digging Deeper in Real-time for Security, Reliability and Performance: Dynamic and Multi-Granular Analytics for Virtualized Networks

  • Jagadeesan L.
  • Mendiratta V.

Real-time analytics provides the promise to enable the rapid detection and mitigation of security, reliability, and performance issues in the emerging area of virtualized services and networks. These multi-domain Software Defineded Networks (SDN), emerging in the industry, can be dynamically reconfigured in real-time through software, allowing rapid response to changes ...

Performance Prediction of Nonbinary Forward Error Correction in Optical Transmission Experiments

  • Alex Alvarado
  • Rios Muller R.
  • Schmalen L.

In this paper, we compare different metrics to predict the error rate of optical systems based on nonbinary forward error correction (FEC). It is shown that the correct metric to predict the performance of coded modulation based on nonbinary FEC is the mutual information. The accuracy of the prediction is ...

Augustus: a CCN router for programmable networks

  • Davide Kirchner
  • Gallo M.
  • Leonardo Maccari
  • Lorenzo Saino
  • Perino D.
  • Raihana Ferdous
  • Renato Lo Cigno

ICN is an architecture proposed for the evolution of the Internet. Despite the attention it received from the research community its deployment has been slowed down by the significant upgrades required to the existing infrastructure. Software programmable networking frameworks constitute an opportunity for the deployment of ICN, as they allow ...

The Marriage of Approximate Computing and Privacy-Preserving Data Analytics

  • Chen R.
  • Christof Fetzer
  • Do Le Quoc
  • Martin Beck
  • Pramod Bhatotia
  • Thorsten Strufe
  • Volker Markl

Online advertisement is a major economic force for modern online services, where users' private data is continuously collected for real-time data analytics. In the current advertisement ecosystem, the goals of users and data analysts are at odds: users' seek stronger privacy, while analysts strive for high-utility data analytics in near ...

High Symbol Rate, Single Carrier, Coherent Optical Transmission Systems for Data Rates from 400 Gb/s to 1.0-Tb/s

  • Adamiecki A.
  • Cho J.
  • Raybon G.

We review recent experimental single carrier coherent transmission systems for bit rates from 400 Gb/s to 1.0 Tb/s, using high-speed electronic multiplexing at symbol rates from 72 GBd to 107 GBd

A New Relaying Protocol For 5G Small Cell With Wireless Backhaul Channels

  • Claussen H.
  • Fang D.

In this paper, we propose a network coding enabled wireless backhaul (NC-WB) for the next generation small cell networks. NC-WB aggregates the access and backhaul links to the same frequency band for wireless backhaul small cells. The smallcell base stations (SBS) generate the network coded functions of the signals coming ...

Measurement and Analysis of Cloud Service Reliability

  • Akkus I.
  • Chen R.
  • Hilt V.
  • Jiang Y.
  • Rimac I.
  • Tola B.
  • Viswanath B.

Cloud computing powers a diverse range of web services today. Cloud-based applications enable us to conduct e-commerce transactions, interact with others via social applications, track our fitness, and even helps us to organize and plan our daily lives. Given the growth and our increasing reliance on cloud services, it is ...