Papers by Guillaume Vivier
SYSTEM SCENARIOS OF END-TO-END RECONFIGURABILITY
This paper will present the System Scenarios that are developed within the European research proj... more This paper will present the System Scenarios that are developed within the European research project End-to-End Reconfigurability (E 2 R) (1,2). Following the presentation of the methodology that was used to identify and define system scenarios, the three families of E²R scenarios will be introduced: (1) Ubiquitous Access, (2) Pervasive Services and (3) Dynamic Resources Provisioning. The impact on the
Page 1. Wireless Pers Commun (2009) 48:4968 DOI 10.1007/s11277-007-9429-2 CooperativeWireless Ne... more Page 1. Wireless Pers Commun (2009) 48:4968 DOI 10.1007/s11277-007-9429-2 CooperativeWireless Networking Beyond Store-and-Forward Perspectives in PHY and MAC design ... 123 Page 3. Cooperative Wireless Networking Beyond Store-and-Forward 51 Fig. ...
Multi-user MIMO and Carrier Aggregation in 4G systems: The SAMURAI approach
2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW), 2012
Wireless Personal Communications, 2009
Page 1. Wireless Pers Commun (2009) 48:4968 DOI 10.1007/s11277-007-9429-2 CooperativeWireless Ne... more Page 1. Wireless Pers Commun (2009) 48:4968 DOI 10.1007/s11277-007-9429-2 CooperativeWireless Networking Beyond Store-and-Forward Perspectives in PHY and MAC design ... 123 Page 3. Cooperative Wireless Networking Beyond Store-and-Forward 51 Fig. ...
Inter-Cell Interference Modeling for OFDMA Systems with Beamforming
Vehicular Technology, IEEE Conference, 2008
In this paper, a method of Gaussian approximation (GA) in a formulated manner is proposed to mode... more In this paper, a method of Gaussian approximation (GA) in a formulated manner is proposed to model inter-cell interference for OFDMA systems with beamforming. It is based on the parameters of 3GPP spatial channel model (SCM). For single-antenna OFDMA systems, the WINNER project proposed that the inter-cell interference can be modeled as white Gaussian noise. However, as indicated by itself,
The throughput of ldpc-based incremental-redundancy schemes with finite blocklength
IEEE International Symposium on Information Theory, 2003
We consider a frequency-flat block-fading Gaussian channel where transmission is slotted and the ... more We consider a frequency-flat block-fading Gaussian channel where transmission is slotted and the channel gain over each slot is random but constant for the whole slot. For simplicity, we assume that the channel gains over different slots are statistically independent and Rayleigh distributed. In this work, we consider the very powerful class of irregular Low-Density Parity-Check (LDPC) codes,[2], and show that they are very good candidates for efficient Hybrid ARQ (H-ARQ) schemes. The H-ARQ scheme under analysis is referred to ...
A Dynamic PF Scheduler to Improve the Cell Edge Performance
Vehicular Technology, IEEE Conference, 2008
In order to improve the QoS in the cell edge of broadband cellular systems, we propose to modify ... more In order to improve the QoS in the cell edge of broadband cellular systems, we propose to modify the proportional fair (PF) scheduling algorithm in a new way. In the traditional PF algorithm, a beta parameter can be used in the denominator to control the PF ratio. In our method, the beta is dynamically adjusted in a time and user
On the scalability of H-ARQ systems in wireless multicast
IEEE International Symposium on Information Theory, 2004
This paper presents the scalability of H-ARQ systems in wireless multicast networks. We consider ... more This paper presents the scalability of H-ARQ systems in wireless multicast networks. We consider a wireless downlink scenario with one transmitter (base-station) that has to reliably deliver the same information to several receivers (user terminals). The channel is block-fading Gaussian. Since the users are completely symmetric and information is the same for all, the optimal delay-unconstrained coding transmission strategy is
Broadcasting of a Common Source: Information-Theoretic Results and System Challenges
We consider the problem of sending a common source to several users simultaneously at possibly di... more We consider the problem of sending a common source to several users simultaneously at possibly dierent level of distortion. In this paper we review the classical information theoretic results on Broadcast Channels, then we examine the opti- mality of analog communication (single-letter coding) and we review the Hybrid Digital Analog (HDA) ap- proach. Finally we motivate the need of all
Next generation wireless systems are foreseen to adopt OFDM based transmission schemes. Unfortuna... more Next generation wireless systems are foreseen to adopt OFDM based transmission schemes. Unfortunately, conventional OFDM schemes suffer from the high mobility associated with next generation wireless systems, thus they need to be supported with enhanced techniques that alleviate the effects of the mobility. Among these, techniques for channel identification bear a particular importance. In this paper, we present two problems
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Workshops, 2010
In this paper, we present a review of automatic repeat request (ARQ) and hybrid ARQ (HARQ) mechan... more In this paper, we present a review of automatic repeat request (ARQ) and hybrid ARQ (HARQ) mechanisms implemented or proposed in beyond 3rd generation (B3G) wireless systems based on OFDMA. In particular, we will focus on part of the IEEE 802.16 standard family (IEEE 802.16-2005, IEEE 802.16m) and on 3GPP Long Term Evolution (LTE). In the second part of this
projects.celtic-initiative.org
Abstract: This deliverable is the final innovation report from the innovation workpackage in WINN... more Abstract: This deliverable is the final innovation report from the innovation workpackage in WINNER+. The document describes the latest innovations and their assessment as well as summarizes the innovations developed in the work package during the project. We analyze the suitability of these innovations as technology enablers for improving current systems, in particular IMT Advanced and beyond. Keywords: Resource allocation, carrier aggregation, femtocells, relaying, network coding, MIMO, Quality of Service, coordinated multipoint, IMT ...
Mobile and Wireless Communications Networks - Proceedings of the Fifth IFIP-TC6 International Conference, 2003
Assuming that different wireless technologies will be cooperating components of the future hetero... more Assuming that different wireless technologies will be cooperating components of the future heterogeneous context, there is a need for designing new management platform in order to handle efficiently the use of the various access systems. This paper provides a high level description of such a management platform, validated by a prototype. This prototype includes two types of the simulation tools that were developed first for palliating the lack of real networks and secondly for being used within the optimisation process. The first simulator is dedicated to the simulation of the IP core network and is based on the wellknown Network Simulator (NS) that have been modified. The second simulator represents the various radio access systems (UMTS, DVB, Hiperlan) and was developed over a radio planning software. Means to interconnect these two simulators between them as well as with the B3G management platform were provided.
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Papers by Guillaume Vivier