Research Papers



Research Papers

RESEARCH PAPER / IEEE EuCNC 2020 / Jun 2020
Some vertical users, e.g. industrial environments, demand customized private 5G networks that address their technological and business needs. These networks present challenges that differ from those of traditional mobile network operators(MNOs), and that should be addressed through innovations in the user, control and management planes. This paper introduces 5G-CLARITY, a...
RESEARCH PAPER / Elseveir Computer Networks / Jun 2020
Forthcoming networks will need to accommodate a large variety of services over a common shared infrastructure. To achieve the necessary flexibility and cost savings, these networks will need to leverage two promising technologies: Network Function Virtualization (NFV) and Multi-access Edge Computing (MEC). While the benefits of NFV and MEC have...
RESEARCH PAPER / Conférence sur l'Apprentissage automatique (CAp) / Jun 2020
Nous présentons une méthode permettant d’ajuster le point de fonctionnement des r´eseaux de neurones r´ecurrents (RNN) pendant l’analyse d’une s´equence en jouant sur le compromis pr´ecision/coˆut de calcul. Cela ouvre la possibilit´e d’adapter les RNN en temps r´eel pour s’adapter aux contraintes de calcul lors de l’exécution. Cela a un...
RESEARCH PAPER / Jun 2020
This paper presents an iterative training of neural networks for intra prediction in a block-based image and video codec. First, the neural networks are trained on blocks arising from the codec partitioning of images, each paired with its context. Then, iteratively, blocks are collected from the partitioning of images via...
RESEARCH PAPER / The ACM Multimedia Systems Conference (MMSys) 2020 / Jun 2020
Versatile Video Coding (VVC) standard is currently being prepared as the latest video coding standard of the ITU-T and ISO/IEC. The primary goal of the VVC, expected to be finalized in 2020, is to further improve compression performance compared to its predecessor HEVC. The frame level, slice level or Wavefront...
RESEARCH PAPER / IEEE International conference on communications (ICC) 2020 / Jun 2020
A physical layer (PHY) abstraction model estimates the PHY performance in system-level simulators to speed up the simulations. This paper presents a PHY abstraction model for 5G New Radio (NR) and its integration into an open-source ns-3 based NR system-level simulator. The model capitalizes on the exponential effective signal-to-interference-plus-noise ratio...
RESEARCH PAPER / IEEE International conference on Multimedia and expo 2020 (ICMEW) / Jun 2020
Immersive experiences of real captured scenes are still challenging due to the amount of data and computational complexity required to achieve real-time. Indeed, Light Field (LF) videos are the required input to produce the sense of depth thanks to the motion parallax, but manipulating such multiview content is cumbersome and...
RESEARCH PAPER / IEEE CLEEN / Jun 2020
Energy consumption is a major issue for modern embedded mobile computing platforms, and with new technological developments, such as IoT and Edge/Fog computing, the number of connected embedded mobile computing systems is rapidly increasing. Heterogeneous multi-core CPUs seek to improve the performance of these platforms, with a particular focus on...
RESEARCH PAPER / IEEE VTC Spring / May 2020
Non-orthogonal multiple access (NOMA) has been studied during the standardization of the new radio (NR), fifth generation (5G) of mobile communications systems. It has been shown that NOMA could potentially offer a robust performance in highly interfered scenarios. Despite the observed capacity gain and performance, the issue of NOMA receiver...
RESEARCH PAPER / WSCG 2020 / May 2020
Processing 3D meshes using convolutional neural networks requires convolutions to operate on features sampled on non-Euclidean manifolds. To this purpose, spatial-domain approaches applicable to meshes with different topologies locally map feature values in vertex neighborhoods to Euclidean ’patches’ that provide consistent inputs to the convolution filters around all mesh vertices....
RESEARCH PAPER / IEEE ICIP / May 2020
In this work we extend the idea of object co-segmentation [10] to perform interactive video segmentation. Our framework predicts the coordinates of vertices along the boundary of an object for two frames of a video simultaneously. The predicted vertices are interactive in nature and a user interaction on one frame...
RESEARCH PAPER / IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS / May 2020
The conventional fully-digital implementation of massive-MIMO systems is not efficient due to the large required number of radio-frequency (RF) chains. To address this issue, hybrid analog/digital (A/D) beamforming was proposed and to date remains a topic of ongoing research. In this paper, we explore the hybrid A/D structure as a...
RESEARCH PAPER / ITU Journal, Special issue "The future of video and immersive media" / Apr 2020
Video compression is a key technology for new immersive media experiences, as the percentage of video data in global Internet traffic (80% in 2019 according to the 2018 Cisco Visual Networking Index report) is steadily increasing. The requirement for higher video compression efficiency is crucial in this context. For several...
RESEARCH PAPER / Laval Virtual World 2020 / Apr 2020
Use cases and challenges about Volumetric Video Immersive Experiences
RESEARCH PAPER / Arxiv / Mar 2020
Diagnosing problems in Internet-scale services remains particularly difficult and costly for both content providers and ISPs. Because the Internet is decentralized, the cause of such problems might lie anywhere between an end-user's device and the service datacenters. Further, the set of possible problems and causes is not known in advance,...
RESEARCH PAPER / SPIE Photonics Europe / Mar 2020
In this work we have developed new type of color splitters, which separate spectrally and spatially the light reaching image sensors by exploiting the nanojet (NJ) beam phenomenon. The goal is to channel respective R, G and B (red, green and blues) spectra to corresponding pixels, and to replace absorbant...
RESEARCH PAPER / DCC 2020 / Mar 2020
This paper describes a new video coding tool in the Versatile Video Coding standard (VVC) named as luma mapping with chroma scaling (LMCS). Experimental compression performance results for LMCS and non-normative examples for deriving LMCS parameter values are also provided. LMCS has two main components: 1) a process for mapping...
RESEARCH PAPER / IEEE 2nd 6G Summit 2020 / Mar 2020
Presentation on "The Path to 6G: Performance Targets and Technology Enablers"
RESEARCH PAPER / 6G Summit 2020 / Mar 2020
This paper presents a study on the evolution of Key Performance Indicators (KPIs) and technology trends towards 6G. Three timescales are considered, namely short-term (2022`ish), medium-term (2025'ish), and long-term (2030`ish). The evolution of these KPIs is analyzed by accounting for forecasts on the emerging use cases and their requirements together...
RESEARCH PAPER / IEEE Communications Surveys & Tutorials - IEEE Xplore / Mar 2020
This paper elaborates on the design challenges, opportunities, and solutions for New Radio-based access to Unlicensed spectrum (NR-U) by taking into account the beam-based transmissions and the worldwide regulatory requirements. NR-U intends to expand the applicability of 5th generation New Radio access technology to support operation in unlicensed bands by...