Delta probing policies for redundancy

  • Borst S.
  • Boxma O.
  • Raaijmakers Y.

We consider job dispatching in systems with N parallel servers. In redundancy-d policies, replicas of an arriving job are assigned to d?N servers selected uniformly at random (without replacement) with the objective to reduce the delay. We introduce a quite general workload model, in which job sizes have some probability ...

Adaptive Step-size Iterative Algorithm for Sparse Signal Recovery

  • Yuan X.

We develop the variational Bayesian plus Euclidean projection (VB-EP) algorithm for sparse signal recovery from compressed measurements. This algorithm is formulated as an iteratively alternating projection strategy. The first step projects the measurements/residuals to the signal level, which is implemented via a Bayesian model; the second step projects the results ...

User level performance analysis of multi-hop in-band backhaul for 5G

  • Drozdy A.
  • Kapanen J.
  • Manner J.

In recent years, mobile access networks operating at millimeter wavelengths have received a great deal of attention, as they promise previously unattainably high mobile data rates. At these frequencies, mobile access links are expected to use highly directional beamforming antennas, which are also well suited to backhaul links. Therefore, access ...

Energy Saving via Efficient Allocation of Paging Frames

We propose an alternative design for paging in next generation networks, and investigate its potential for increasing the energy efficiency of base stations. The proposed design allocates the paging frames in certain radio frames, aiming at providing longer sleep opportunities to the base stations. This allows more hardware components to ...

Slow Food, Slow Code

  • Latuszek G.

Have you met term slow-food?. Look at It came to life as reaction for fast-food. Its manifesto is "everyone has the right to good, clean and fair food" (Carlo Petrini - Slow Food Founder & President). How it maps to software engineering, especially test automation? I'm sure you have ...

Non-convex weighted ?<inf>p</inf>nuclear norm based ADMM framework for image restoration

  • Liu X.
  • Tang L.
  • Wang Q.
  • Wu Y.
  • Yuan X.
  • Zha Z.
  • Zhang X.

© 2018 Inspired by the fact that the matrix formed by nonlocal similar patches in a natural image is of low rank, the nuclear norm minimization (NNM) has been widely used in various image processing studies. Nonetheless, nuclear norm based convex surrogate of the rank function usually over-shrinks the rank ...

ApproxJoin: Approximate Distributed Multi-way Joins

  • Akkus I.
  • Bhatotia P.
  • Blanas S.
  • Chen R.
  • Fetzer C.
  • Le Quoc D.
  • Strufe T.

The join operation is a fundamental building block of parallel data processing. Unfortunately, it is very resource-intensive to compute an equi-join across massive datasets. The approximate computing paradigm allows users to trade accuracy and latency for expensive data processing operations. The equi-join operator is thus a natural candidate for optimization ...

On Robustness of Cloud Speech APIs: An Early Characterization

  • Isopoussu A.
  • Kawsar F.
  • Lane N.
  • Mathur A.
  • Nadia Berthouze
  • Robert Smith

The robustness and consistency of sensory inference models under changing environmental conditions and hardware is a crucial requirement for the generalizability of recent innovative work, particularly in the field of deep learning, from the lab to the real world. We measure the extent to which current speech recognition cloud models ...

Monitoring Daily Activities of Multiple Sclerosis Patients with Connected Health Devices

  • Bhattacharya S.
  • Gil Ramos A.
  • Kawsar F.

We report results from a pilot study that focuses mainly on understanding the everyday life quality of patients suffering from multiple sclerosis through the lens of connected Nokia Health devices. Our dataset comprises of 198 individuals (184 females and 14 males) and the study lasted over six months. By analyzing ...

On Indoor Human Sensing using Commodity Radar

  • Alloulah M.
  • Isopoussu A.
  • Kawsar F.

Radio frequency radar indoors is gaining traction owing to its promise for extended coverage and device-free operation. However, while the well-behaved radar sensing model affords clear advantages, the cluttered indoor environment presents numerous challenges for reliable human sensing. Classic radar techniques are hard to call upon since the kinematic and ...

Integrated lithium niobate electro-optic modulators operating at CMOS-compatible voltages

  • Bertrand M.
  • Chandrasekhar S.
  • Chen X.
  • Lon?Ar M.
  • Shams-Ansari A.
  • Wang C.
  • Winzer P.
  • Zhang M.

Electro-optic modulators translate high-speed electronic signals into the optical domain and are critical components in modern telecommunication networks1,2and microwave-photonic systems3,4. They are also expected to be building blocks for emerging applications such as quantum photonics5,6and non-reciprocal optics7,8. All of these applications require chip-scale electro-optic modulators that operate at voltages compatible ...

RConf(PD): Automated resource configuration of complex services in the cloud

  • Aroca J.
  • Fu X.
  • Hilt V.
  • Iglesias J.
  • Koll D.
  • Prasad A.

Optimal deployment of complex services in a virtualized environment is still an open problem. These services typically consist of a set of connected components, and each component may consist of multiple instances. Each instance can in turn be run in different virtual flavors, while the service constructed by the combination ...

Network Calculus: from theory to practical implementation

  • Bouillard A.
  • Boyer M.
  • Le Corronc E.

The idea to write a document gathering existing results of network calculus stems from the French-founded project PEGASE (2010-2013). It took several years to write a complete book. During these years, we benefited from the support of many colleagues and friends, specially at ONERA and LINCS. We would like to ...

Network Slice Resource Allocation in 5G Mobile Networks

  • Fendt A.
  • Mannweiler C.
  • Schmelz C.

Network slicing is one of the key features of 5G mobile networks to cope with the diverging network requirements introduced by new use cases, like the IoT, autonomous driving and the Industry of the Future. Network slices are isolated, virtualized, end-to-end networks optimized for specific use cases. But still they ...

Demonstration of an Erbium-Doped Fiber with Annular Doping for Low Gain Compression in Cladding-Pumped Amplifiers

  • Chen H.
  • Essiambre R.
  • Fontaine N.
  • Jin C.
  • Kelly C.
  • Larochelle S.
  • Matte-Breton C.
  • Messaddeq Y.
  • Ryf R.

We present the design and characterization of a cladding-pumped amplifier with erbium doping located in an annular region near the core. This erbium-doped fiber is proposed to reduce gain saturation, leading to smaller gain compression when compared to uniform core doping. Through numerical simulations, we first compare the performance of ...

Stand-alone LTE in unlicensed spectrum: Radio Challenges, Solutions, and Performance of MulteFire

  • Frederiksen F.
  • Kuusela M.
  • Pedersen K.
  • Rosa C.

The deployment of standalone LTE radio technology in unlicensed spectrum can enable new business cases by leveraging the assets of LTE to industry players not having access to licensed spectrum. With this objective in mind the MulteFire Alliance has recently finalized first release of the MulteFire standard specifications, which in ...

200Gb/s Transmission Over 20km of FMF Fiber Using Mode Group Multiplexing and Direct Detection

  • Benyahya K.
  • Bigot M.
  • Charlet G.
  • Ghazisaeidi A.
  • Jian P.
  • Labroille G.
  • Renaudier J.
  • Rios Muller R.
  • Sillard P.
  • Simonneau C.

We demonstrate 200Gb/s bidirectional transmission over 20km of step-index FMF fiber using selective excitation of 4 mode groups, direct detection and a single laser in each propagative direction.

Remote Mode-Forming Over Multimode Fiber Employing Single-Ended Channel Estimation

  • Alvarado J.
  • Amezcua Correa R.
  • Chen H.
  • Du J.
  • Fontaine N.
  • Gross S.
  • He Z.
  • Li J.
  • Lopez J.
  • Neilson D.
  • Riesen N.
  • Ryf R.
  • Winzer P.
  • Withford M.
  • Wittek S.

Mode-forming over multimode fiber without access to the remote end is needed for endoscopic imaging and beam steering. We use reflective spatial pilots and transmitter-side MIMO to form uncoupled spatial and polarization modes at the remote end.

50 Gb/s PAM-4 Transmission over 80-km SSMF without Chromatic Dispersion Compensation

  • Buchali F.
  • Buelow H.
  • Chagnon M.
  • Henning Bülow
  • Hu Q.
  • Schuh K.
  • Thai Le S.

With the combination of Tomlinson-Harashima precoding and Volterra equalization, we successfully transmit 28 GBd PAM-4 signal over 80-km chromatic dispersion uncompensated fiber link, achieving a BER below 5x10-4.