Load-aware Transparent Reach Maximization in Flexible Optical Networks

  • Morea A.

We propose a novel load-aware power-selection strategy for maximizing the transparent reach in dispersion-uncompensated flexible optical networks with coherent modulation formats, and we quantify the savings in opto-electronic regenerations with respect to using the standard full-load transparent reach.

Asymmetric Bidirectional Optical Connections

  • Morea A.
  • Verchere D.

Asymmetric bidirectional routing for more cost-efficient optical networks based on IP-over-WDM architectures leveraging on elasticity saves 13% optoelectronic devices.

Forward Error Correction Codes for Polarization Multiplexed Optical Transmissions with Polarization Dependent Loss

  • Aref V.
  • Buchali F.
  • Leven A.
  • Schmalen L.

We study long-haul coherent optical transmissions suffering from polarization dependent loss (PDL). Using simulation results, the channel is modeled as parallel channels with randomly distributed noises. By characterizing the noise, we show how to minimize the PDL penalties by using spatially coupled LDPC codes and interleaving data between two orthogonal ...

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

  • 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 0.2 dB experimentally.

How the tolerance to optical filtering impacts the number of optoelectronic regenerators in the core DWDM network

  • Morea A.
  • Renaudier J.
  • Zami T.

This study gives insight on what the maximum filtering-induced penalty should be to maintain reasonable impact of tight filtering on the total number of required transponders for 2 different backbone networks.

Sub-graph based Rerouting Algorithm for Flexible Optical Networks Incorporating Fully Utilized Resources

  • Dembeck L.
  • Ilchmann F.
  • Leven A.

In this work, we employ a novel sub-graph (SG) based rerouting algorithm to reduce the path computation effort. Simulation results show that our algorithm needs significantly less path computations to achieve blocking probabilities comparable to brute-force (BF) search results.

Hierarchical Caching for Online Video

  • Akhtar S.
  • Beck A.
  • Rimac I.

We survey existing caching algorithms for their suitability to online video in a hierarchical cache. We have proposed a new algorithm based on additional requirements for online video. We propose new evaluation metrics for online video caching such as hit-rate, replacement rate and ability to recover quickly from cache popularity ...

IntelliSpektrum Project final report - Network Topics

  • Wich A.
  • Wiegner D.

Final Report of the IntelliSpektrum Project. National funded Project - German language only! Included are the network management topics, additional transceiver topics will be submitted separately. Consent of further authors from Wireless and Network Energy Programs given. Parts of this report have already been incrementally submitted in publication release in ...

Interference Suppression for Differential Cooperative D2D Communications with Multiple Antennas

  • Shen G.
  • Wu Z.

In this paper, we investigate double differential detection (DD) for cooperative D2D communications using multiple antennas with unknown carrier frequency offsets. Most existing work in cooperative D2D communications assumes perfect channel knowledge at all devices and no carrier frequency offsets (CFO). However, accurate channel state information (CSI) can be difficult ...

Rolling out a radical shift in test automation through a multi-release project management approach

  • Ck S.
  • Kumar P B.

This paper examines a multi-release program management approach to bring in a radical shift in test automation strategy for a telecom project. The existing test automation using GUI automation tools was found inadequate and as regression test effort was increasing, the team came up with an in-house framework to GUI ...

Multiuser Precoding in Massive MIMO Systems: From a Precoding Granularity Perspective

  • Wu K.

We discuss the impact of downlink (DL) multiuser precoding granularities (in the frequency domain) on massive multiple-input-multiple-output (MIMO) systems. In practice, multiuser precoding is performed on a per block basis, i.e., all subcarriers in one block use the same precoding matrix calculated from the average channel state information (CSI) of ...

Legacy voice to IMS: an MSO roadmap

  • Joseph J.

MSOs can modernize their voice networks with IMS-based solutions as shown in this practical roadmap.

High symbol rate coherent transmission systems for data rates above 400 Gb/s

  • Adamiecki A.
  • Randel S.
  • Raybon G.
  • Winzer P.

We review recent experimental coherent transmission systems for bit rates from 400 Gb/s to 1.2 Tb/s, using high-speed electronic multiplexing to symbol rates from 72 GBd to 107 GBd.

A Detachable 2-DOF Resonator for Electromagnetic Energy Harvesting Systems

  • Blokhina E.
  • Feely O.
  • Frizzell R.
  • Fu B.
  • O’Connell D.

In this work, a novel resonator model consisted of two detachable masses with Coulomb damping has been developed. Fitting analysis between simulation results and experimental data shows that the proposed model exhibits better performance compared to the conventional mass-spring model with only viscous dampers. The energy harvesting system using the ...

Location K-Anonymity under a Streaming Model

  • Andrews D.
  • Wilfong G.
  • Zhang Y.

In this paper we study how to achieve location anonymization under a streaming model. K-anonymity is a popular notion of privacy for which every recorded data point is identical to at least $k-1$ other data points. For location based data, k-anonymity refers to recording a coarse region that contains at ...

A multiple DOF velocity-amplified VEH: Modeling and Characterization

  • Boco E.
  • Frizzell R.
  • Kelly G.
  • Nico V.
  • O’Donoghue D.
  • Punch J.

A macroscopic two degree-of-freedom (2Dof) nonlinear energy harvester, which employs velocity amplification to enhance the power scavenged from ambient vibrations, is presented. Velocity amplification is achieved through sequential collisions between free-moving masses, and the final velocity is proportional to the mass ratio and the number of masses. Electromagnetic induction is ...

Characterization and optimization of a 2DOF velocity amplified EM EH

  • Boco E.
  • Frizzell R.
  • Kelly G.
  • Nico V.
  • O’Donoghue D.
  • Punch J.

A two degree of freedom velocity amplified electromagnetic energy harvester has been taken in consideration. The structure is constituted by a little mass which is responsible of the electromagnetic conversion, and an outer bigger mass, for the velocity amplification. The aim of the work has been to characterize both the ...

A multiple degree-of-freedom velocity amplified vibrational energy harvester: experimental analysis and modelling

  • Boco E.
  • Frizzell R.
  • Kelly G.
  • Nico V.
  • O’Donoghue D.
  • Punch J.

A macroscopic two degree-of-freedom (2Dof) nonlinear energy harvester, which employs velocity amplification to enhance the power scavenged from ambient vibrations, is presented. Velocity amplification is achieved through sequential collisions between free-moving masses, and the final velocity is proportional to the mass ratio and the number of masses. Electromagnetic induction is ...

On-Demand State Migration Protocol for Elastic IMS Cloud Components

  • Cucinotta T.
  • Hilt V.
  • Jul E.
  • Meroni A.
  • Sala A.

In the context of Network Functions Virtualisation one of the key feature we have to deal with is elasticity, namely the capability of a Virtualised Network Function to be designed so as to work in dynamic clusters. Usually, to balance the incoming load, a load-balancer is put in front of ...

A 5.75-Vpp 100-Gb/s InP-DHBT-based differential 2:1-selector-driver module for 100-GBd optical communication systems

  • Berdaguer P.
  • Dupuy J.
  • Duval B.
  • Godin J.
  • Jorge F.
  • Konczykowska A.
  • Nodjiadjim V.
  • Riet M.

A 2:1-selector-driver module with a record differential output amplitude of 5.75 Vpp at 100 Gb/s is reported. It implements a monolithically integrated differential-distributed-amplifier-based driver with a 2:1-selector input stage, realised in a 0.7-µm indium phosphide (InP) double hetero-junction bipolar transistor (DHBT) technology. Broadband input and output transmission lines have been ...