164documents trouvés
Interference-aware bandwidth reservation in multi-radio multi-channel mesh networks
U.ASHRAF, S.ABDELLATIF, G.JUANOLE
Air University, SARA
Revue Scientifique : Vol.35, N°17, 2149p. , N° 12568
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128306Split phase multi-channel MAC protocols - Formal specification and analysis
A.EL FATNI, G.JUANOLE
SARA
Manifestation avec acte : IEEE International Symposium on Modeling Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS'2012), Washington (USA), 7-9 Août 2012, pp.485-488 , N° 12461
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127931Networked control systems (NCSs): on the interest of a co-design approach based on interplays between quality of control and quality of service
X.NGUYEN, G.JUANOLE
SARA
Manifestation avec acte : IEEE International Symposium on Industrial Embedded Systems (SIES'12), Karlsruhe (Allemagne), 20-22 Juin 2012, pp.85-93 , N° 12006
Lien : http://hal.archives-ouvertes.fr/hal-00668491
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Abstract
We consider several simple process control applications (DC motor) implemented on the CAN network. The goal of this paper is to consider a co-design approach between the controller and the Local Area Network (LAN). More precisely we consider the link between the Quality of Control (QoC) provided by the controller and the Quality of Service (QoS) provided by the LAN network (i.e. a bidirectional relation QoS<->QoC). We present, first, the implementation of the relation QoS->QoC on the base of a compensation method for time delays called dominant pole method, and second, the implementation of the relation QoC->QoS on the base of the hybrid priorities for the scheduling of frames. The final objective is the implementation of the bidirectional relation QoS<->QoC which is the combination of the both relations QoS->QoC and QoC->QoS in order to have a more efficient NCSs design.
On interplays between the Quality of Service and the Quality of Control for a co-design approach in Wireless Networked Control Systems (WNCSs)
X.NGUYEN, G.JUANOLE
SARA
Rapport LAAS N°12144, Mars 2012, 9p.
Lien : http://hal.archives-ouvertes.fr/hal-00668746
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Abstract
We consider the implementation of process control applications on a Wireless Local Area Network (WLAN) with a collision-free CSMA MAC protocol called CANlike protocol (adaptation of the MAC protocol of the CAN bus to the wireless context). The co-design approach is based on links between the Quality of Control (QoC) provided by the controller and the Quality of Service (QoS) provided by the frame scheduling in the MAC layer of the WLAN. We present, first, the implementation of the relation QoS→QoC on the base of the delay compensation method called dominant pole method, and second, the implementation of the relation QoC→QoS on the base of the hybrid priorities for the frame scheduling. Finally, we show the interest of the relation QoS⇋QoC i.e. the joint action of the delay compensation and the role of the hybrid priority in order to have a more efficient WNCS design.
Specification of collision-Free CSMA MAC protocols for wireless LANs
G.JUANOLE, X.NGUYEN, G.MOUNEY
SARA
Rapport LAAS N°12145, Mars 2012, 9p.
Lien : http://hal.archives-ouvertes.fr/hal-00668745
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Abstract
Collision-free CSMAMAC protocols are interesting solutions for considering real-time traffic in a wireless context. The goal of this paper is precisely to make an exhaustive presentation (which, we think to be understandable and pedagogical) of the main collision-free CSMA MAC protocols for one-hop wireless LANs, considering priorities (static, hybrid [4]) associated to the frames. The priorities are represented by either the BlackBurst technique [10], [7] or an adaptation of the CAN bus protocol [2] to the wireless context we call CANlike protocol [11], [9], [5]. The cornerstone of this work is the concept of Ambiguity Time Window that we have defined for characterizing the Physical layer, and which allows to specify the parameters of the considered protocols. In our knowledge, such kind of study has never been done.
Route maintenance in IEEE 802.11 wireless mesh networks
U.ASHRAF, S.ABDELLATIF, G.JUANOLE
OLC
Revue Scientifique : Computer Communications, Vol.34, N°13, pp.1604-1621, Août 2011 , N° 10232
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124840Split phase multi-channel MAC approach. Modelling and qualitative analysis
A.EL FATNI, G.JUANOLE, T.VAL
OLC, IRIT-UPS
Rapport LAAS N°11309, Juin 2011, 10p.
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124745Modélisation et analyse des protocoles MAC multi-canaux basés sur l'approche du "canal d"dédié"
A.EL FATNI, G.JUANOLE, T.VAL
OLC, IRIT-UPS
Manifestation avec acte : Colloque Francophone sur l'Ingénierie des Protocoles (CFIP'2011), Sainte Maxime (France), 10-13 Mai 2011, 6p. , N° 11118
Lien : http://hal.inria.fr/inria-00587122/fr/
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Résumé
L'utilisation dans le cadre des réseaux sans fil de multiples canaux orthogonaux au niveau des protocoles MAC offre une grande potentialité pour améliorer, par rapport à la communication mono-canal, le débit des transmissions. Toutefois, le contexte multi-canal nécessite une fonction supplémentaire au niveau MAC qui porte sur l'allocation et la coordination des canaux. Plusieurs variantes d'allocation de canaux ont été définies et proposées dans la littérature. Cependant, il existe peu d'études basées sur des techniques formelles afin de vérifier les propriétés fondamentales des mécanismes d'allocation. Le but de cet article est précisément de proposer une modélisation formelle et la vérification des protocoles MAC multi-canaux basés sur l'approche du canal dédié à l'aide du modèle RdPTS (Réseaux de Petri Temporisés Stochastiques). Nous vérifions la propriété de réservation en termes d'utilisation en exclusion mutuelle des canaux de données.
Wireless communication networks and process control applications: study the influence of MAC protocols
X.NGUYEN, G.JUANOLE, G.MOUNEY, C.CALMETTES
OLC, MRS, CUFR
Manifestation avec acte : Global Communications Conference (GLOBECOM 2010), Miami (USA), 6-10 Décembre 2010, pp.1689-1694 , N° 10455
Lien : http://hal.archives-ouvertes.fr/hal-00656659/fr/
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Abstract
The performances of the process control applications, which are implemented through networks, depend greatly on the scheduling of the messages. Furthermore, in the context of the wireless networks, because of the unreliable medium, it is difficult to meet the timing requirements imposed by the applications dynamics. The objective of this paper is, by considering a Wireless Local Area Network (WLAN) and a process control application, to compare the performances of this application by using MAC protocols of the type CSMA (which manage the messages scheduling): two protocols with collision avoidance (CA), provided by manufacturers (IEEE 802.11 - WiFi, IEEE 802.15.4 - ZigBee) which do not prevent the occurrence of collisions; a proposed free-collision protocol which is based on priorities specified by means of BlackBurst messages.
Formal modelling and verification of the common hopping multi-channel MAC protocols
A.EL FATNI, G.JUANOLE, T.VAL
OLC, LATTIS, Toulouse
Manifestation avec acte : International Conference on Modeling Analysis and Simulation of Wireless and Mobile Systems (MSWIM 2010), Bodrum (Turquie), 17 21 Octobre 2010, pp.311-318 , N° 10511
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