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3 results on '"Roelens, Frederic"'

1. Modeling and Implementation of 5G Edge Caching over Satellite

Author

Vu, Thang Xuan, Poirier, Yannick, Chatzinotas, Symeon, Maturo, Nicola, Grotz, Joel, Roelens, Frederic, Vu, Thang Xuan, Poirier, Yannick, Chatzinotas, Symeon, Maturo, Nicola, Grotz, Joel, and Roelens, Frederic

Abstract

The fifth generation (5G) wireless networks have to deal with the high data rate and stringent latency requirements due to the massive invasion of connected devices and data-hungry applications. Edge caching is a promising technique to overcome these challenges by prefetching the content closer to the end users at the edge node’s local storage. In this paper, we analyze the performance of edge caching 5G networks with the aid of satellite communication systems. Firstly, we investigate the satellite-aided edge caching systems in two promising use cases: a) in dense urban areas, and b) in sparsely populated regions, e.g., rural areas. Secondly, we study the effectiveness of satellite systems via the proposed satellite-aided caching algorithm, which can be used in three configurations: i) mono-beam satellite, ii) multi-beam satellite, and iii) hybrid mode. Thirdly, the proposed caching algorithm is evaluated by using both empirical Zipf-distribution data and the more realistic Movielens dataset. Last but not least, the proposed caching scheme is implemented and tested by our developed demonstrators which allow real-time analysis of the cache hit ratio and cost analysis.

Published
2020
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2. Modeling and implementation of 5G edge caching over satellite.

Author

Vu, Thang X., Poirier, Yannick, Chatzinotas, Symeon, Maturo, Nicola, Grotz, Joel, and Roelens, Frederic

Subjects
WOODEN beams, ARTIFICIAL satellites, TELECOMMUNICATION satellites, 5G networks, ALGORITHMS, EDGES (Geometry), COST analysis, ARTIFICIAL satellite launching
Abstract

Summary: The fifth‐generation (5G) wireless networks have to deal with the high data rate and stringent latency requirements due to the massive invasion of connected devices and data‐hungry applications. Edge caching is a promising technique to overcome these challenges by prefetching the content closer to the end users at the edge node's local storage. In this paper, we analyze the performance of edge caching 5G networks with the aid of satellite communication systems. First, we investigate the satellite‐aided edge caching systems in two promising use cases: (a) in dense urban areas and (b) in sparsely populated regions, eg, rural areas. Second, we study the effectiveness of satellite systems via the proposed satellite‐aided caching algorithm, which can be used in three configurations: (a) mono‐beam satellite, (b) multi‐beam satellite, and (c) hybrid mode. Third, the proposed caching algorithm is evaluated by using both empirical Zipf‐distribution data and the more realistic Movielens dataset. Last but not least, the proposed caching scheme is implemented and tested by our developed demonstrators which allow real‐time analysis of the cache hit ratio and cost analysis. [ABSTRACT FROM AUTHOR]

Published
2020
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3. MULTI INPUT LNB – DEMONSTRATOR OF A REFLECTOR FEED ARRAY RECEIVER FOR SATELLITE BROADCAST RECEPTION

Author

Grotz, Joel, Braun-Lois, Ainhoa, Coutelier, Thierry, Guedin, Elise, Amato, Francesco, Abraham, Thierry, Roche, Daniel, Kegel, Koos, Caner, Dogan Hakan, Roelens, Frederic, and van der Wal, Erik

Subjects
Telekommunikation, DVB, Satellite, Telecommunications, MLNB, broadcast reception, beamforming, feed array reflector antenna
Abstract

A demonstrator setup of a customized receiver antenna, a multi-input low noise block down-converter (MLNB) is presented in this paper. This antenna concept is based on a reflector feed array reception antenna for satellite Ku-band broadcast reception. In specific circumstances the Ku-band broadcast reception can be subject to interference form adjacent satellites give the customer demand for compact and easy to install reception antennas suitable for direct-to-home (DTH) reception. In this context a compact 45cm Ku-band reception antenna with coherent 3-element feed has been defined according to specific reception system requirements for broadcast system and setup and tested in the context of the ESA ARTES 5.2 Project. The demonstrator consist of an antenna prototype conceived by FTA Inverto for coherent reception of 3 feeds and a beamforming chipset from ASTRON operating in L-band and based on an NXP SiGe technology and chipset processes as well as beamforming control software from SES TechCom. Antenna measurements in a compact antenna test range (CATR) as well as over satellite demonstrate the achievable reception gain re-configurability which permits to adapt the broadcast antenna front end to different reception scenarios. The demonstrated benefits to satellite broadcast reception are to first provide an antenna system to mitigate adjacent satellite interference via reconfigure antenna gain nulling, second provide an antenna system for reception of any desired satellite signal within a given azimuth opening angle as well as third provide assistance at installation via an auto-fine-pointing procedure. This paper presents the demonstrator setup and justifies and explains the design choices in the context of the framing commercial requirements. Furthermore the antenna simulations and measurement results are presented here in view of the technical specification defined. The antenna re-configurability and control procedures are presented as well as the related reconfiguration example results and performance. QC 20121114

Published
2012

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