Towards Reliable Application Deployment in the Cloud

  • Akkus I.
  • Chen R.
  • Hilt V.
  • Rimac I.
  • Viswanath B.

Applications are moving from self-maintained infrastructure to the cloud. A common practice to increase the reliability of a cloud application is to deploy redundant instances. Unfortunately, such redundancy efforts can be undermined if the application's instances share common dependencies. This paper presents reCloud, a novel system which can efficiently find ...

Long distance transmission over coupled-core multicore fiber

  • Amezcua-Correa R.
  • Carlos Alvardo J.
  • Chang S.
  • Chen H.
  • Essiambre R.
  • Fontaine N.
  • Hayashi T.
  • Huang B.
  • Ryf R.

We demonstrate combined wavelength- and space-multiplexed long distance transmission over a coupled-core fiber with 4 cores. The fiber shows a very small impulse response spread, achieves better performance than a comparable single mode fiber, while providing 4 times the capacity.

A 62Tb/s Transoceanic Transmission Experiment Using Probabilistically-Shaped PDM-64QAM

  • Buchali F.
  • Carbo Meseguer A.
  • Charlet G.
  • Fernandez De Jauregui Ruiz I.
  • Ghazisaeidi A.
  • Hu Q.
  • Renaudier J.
  • Rios Muller R.
  • Schmalen L.
  • Tran P.

We report on a C+L-band transmission of 62 Tb/s over 6600km using 49 GBd probabilistically-shaped 64QAM (PS64QAM) modulation format, digital-back propagation based nonlinear compensation, and adaptive-rate spatially-coupled LDPC decoding. We compare the performance of PS64QAM with that of 32QAM.

Low-Cost Superimposed Pilots Based Receiver for Massive MIMO in Multicarrier System

  • Chen Y.

In this paper, we present a low-cost receive algorithm for massive Multiple-Input Multiple-Output (MIMO) system, which exploits 2-dimensional superimposed pilots in time and frequency domain. By introducing the well designed superimposed pilots, the pilot contamination can be systematically suppressed. Even within a small time-frequency allocation, transforming the 2-dimensional superimposed pilots ...

Taxonomy-based Supervised Topic Labeling

  • Ajwani D.
  • Nicholson P.
  • Sala A.
  • Taneva-Popova B.

The rise of AI assisted applications, bots-based customer support and personal assistants is imposing higher and higher accuracy requirements in interpreting and contextualizing text data. A fundamental building block in automated understanding of text is to assign a topic label to a text document, at an appropriate level of granularity. ...

Grammatical Genetic Programming for Scheduling in Realistic Heterogeneous Communications Networks

  • Claussen H.
  • David Lynch
  • Kucera S.
  • Michael Fenton
  • Michael O’Neill

Grammatical Genetic Programming is used to evolve Small Cell schedulers on a realistic simulation of a 3GPP 4GLTE heterogeneous cellular network. Extensive analysis of the solution and its performance across a wide range of metrics reveals evolution has uncovered a new human-competitive Small Cell scheduling technique which generalises well across ...

Low-Latency Communication in LTE and WiFi using Spatial Diversity and Encoding Redundancy

  • Kucera S.
  • Yasuo Tan
  • Yu Yu
  • Yuto Lim

In mobile and wireless networks, controlling data delivery latency is one of open problem due to the stochastic nature of wireless channels which are inherently unreliable. This paper open an opportunity to explores how the current best-effort throughput-oriented wireless services could be evolved into latency-sensitive enablers of new mobile applications ...

Ensemble Techniques for Scheduling in Heterogeneous Wireless CommunicationscNetworks

  • Claussen H.
  • David Lynch
  • Kucera S.
  • Michael Fenton
  • Michael O’Neill

Operators can increase the capacity of their wireless networks by installing Small Cells in high traffic regions. However, User Equipments (UEs) at the edges of Small Cells suffer severe interference from neighbouring high-powered Macro Cells. It is desirable to tradeoff the rates of cell-centre UEs, so that cell-edge UEs do ...

Accurate Event Distribution Monitoring for Very Large Wireless Systems

  • Bejerano Y.
  • Raman C.
  • Yu C.

In a network of large number of devices, we address the problem of estimation of the probability distribution of quantities measured by the set of nodes in a geographical area. Queries are sent to the nodes by the network with the reporting condition and reporting probability. Nodes that satisfy the ...

Study of subband multiplexing at 54 GHz modulation bandwidth for 16QAM and probabilistic shaped 64QAM

  • Buchali F.
  • Eriksson T.
  • Fabian Steiner
  • Georg Boecherer
  • Idler W.
  • Patrick Schulte
  • Schmalen L.
  • Schuh K.

We assessed the electriacal subband multiplexed 16QAM and PS-64QAM signals at 54 GHz modulation bandwidth. We showed a 14% and 9% reach gain versus a comparable single carrier system. A detailed subband analysis exhibits up to 40% gain versus single carrier while worse subcarriers suffer from limited system performance due ...

Probabilistic Shaped QAM for Reach and Spectral Efficiency Adaptation

  • Buchali F.
  • Idler W.
  • Schmalen L.

In this paper we review practical application of probabilistic shaping in long haul transmission systems.

Maximizing Bandwidth Allocation in Optical Ethernet

  • Gebhard U.

The IEEE 802.17 fairness protocol is adapted and enhanced for Optical Ethernet, a new connectionless transport-network architecture. The implementation is described and benchmarked by simulation.

Reach Increasse for High Capacity Optical Transmission Systems by Probabilistic Shaping

  • Böcherer G.
  • Buchali F.
  • Idler W.
  • Schmalen L.
  • Schulte P.
  • Steiner F.

We review capacity achieving formats applied for high data rate optical transmission and report on reach gain using probabilistic shaping versus regular QAM formats at data rates between 200 and 300 Gb/s.

Exploring Relationships In Complex Heterogeneous Networks

  • Sala A.

Current trends are showing that we are at the dawn of a new technological era, which is driven by the digitalization of everything and everyone. In this era, the utmost goal should be to create efficiency in human lives by maximizing our capability to instantly attain anything, thereby saving time. ...

Field demonstration of 1 Tb/s superchannel transmission supported by probabilistic shaped constellations

  • Buchali F.
  • Fabian Steiner
  • Georg Böcherer
  • Idler W.
  • Lach E.
  • Patrick Schulte
  • Ralf Peter Braun
  • Schmalen L.

We have introduced a low cost backbone network architecture for 1-Tb/s superchannel transmission. To meet huge reach requirements in case of link failure we applied improved sensitivity probabilistic shaped constellations in a flex transponder application. For all distances of working paths up to 1000 km we successfully demonstrated 1-Tb/s transmission ...

Analytic Framework for Advanced Radio Access Protocols for the Internet of Things

  • Braun V.
  • Centenaro M.
  • Saur S.
  • Vangelista L.
  • Weber A.

Core of this paper are a analytic framework to evaluate the performance of radio access protocols and its validation through a comparison with computer simulations. We apply our method in the context of the future generation of cellular networks, also known as 5G, that is supposed to integrate the traditional ...

Air Interface Capacity Dimensioning for 4G and Beyond Mobile Networks

  • Aly I.
  • Salah S.

In early generations of mobile communication systems, Air Interface capacity dimensioning was being done by estimating the total number of channels needed by a certain number of users, while maintaining some specific Grade Of Service (GOS), which is sometimes referred to as the blocking probability. Over the past few years, ...

A protocol for Optical Data Unit service encryption

  • Giouroukos P.

When interconnecting data centers encryption is required since the exchange data travel via public networks. The layer performing encryption has to be considered carefully. The obvious place, encrypting the packet stream at the gateway might not be always the best solution in terms of effort and costs. Another possible place ...

112-Gbit/s Intensity-Modulated Direct-Detect Vestigial-Sideband PAM4 over 80km SSMF link

  • Chen Y.
  • Kaneda N.
  • Lee S.

A vestigial-sideband 4-level pulse amplitude modulation (VSB-PAM4) scheme is proposed for intensity-modulated, direct-detect optical transmission and experimentally demonstrated to achieve 112Gbit/s per wavelength over 80 km of standard single-mode fiber.

Engineering a Parallel $k$-Shortest Simple Paths Algorithm for Multicores

  • Ajwani D.
  • Duriakova E.
  • Hurley N.

In recent decades, there has been a considerable interest in mining heterogeneous information from diverse sources in a holistic way. This information is often linked together in the form of a graph, where the vertices represent entities, edges represent direct relationships between these entities and the edge weights represent the ...