Analyse de robustesse du réseau TTP/C
Identifieur interne : 008144 ( Main/Merge ); précédent : 008143; suivant : 008145Analyse de robustesse du réseau TTP/C
Auteurs : Nicolas Navet [France] ; Bruno Gaujal [France]Source :
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Abstract
Nous montrons comment utiliser de façon optimale des unités tolèrantes aux fautes (Fault-Tolerant Units - FTU) pour se prémunir contre des perturbations en rafales sur un réseau TDMA. Deux objectifs sont étudiés. Si l'on veut minimiser la probabilité de perdre toutes les répliques d'un même message, la politique optimale est de répartir la transmission des répliques dans le temps. La preuve utilise des propriétés de convexité de la probabilité de perte. Au contraire, si l'on veut minimiser la probabilité de perdre une réplique ou plus, alors la solution optimale est de transmettre les répliques regroupées dans le temps. La preuve est basée sur une technique de majoration. Finalement, nous adaptons ces résultats au cas particulier du protocole TTP/C.
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type="indirect"><org type="institution" xml:id="struct-300293" status="OLD"><orgName>Institut National Polytechnique de Lorraine</orgName><orgName type="acronym">INPL</orgName><date type="end">2011-12-31</date><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-2496" type="direct"><org type="laboratory" xml:id="struct-2496" status="OLD"><orgName>INRIA Lorraine</orgName><desc><address><addrLine>615 rue du Jardin Botanique 54600 Villers-lès-Nancy</addrLine><country key="FR"></country></address><ref type="url">http://www.inria.fr/centre-de-recherche-inria/nancy-grand-est</ref></desc><listRelation><relation active="#struct-300009" type="direct"></relation></listRelation></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Nancy</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Université Nancy 2</orgName><orgName type="institution" wicri:auto="newGroup">Université de Lorraine</orgName><placeName><settlement type="city">Nancy</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Institut national polytechnique de Lorraine</orgName><orgName type="institution" wicri:auto="newGroup">Université de Lorraine</orgName></affiliation></author></analytic></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>x-by-wire</term></keywords><keywords scheme="mix" xml:lang="fr"><term>fault tolerance</term><term>fiabilité</term><term>network reliability</term><term>noisy channels</term><term>real-time systems</term><term>systèmes temps réel</term><term>tolérance aux fautes</term><term>transmission non-fiable</term><term>vehicles</term><term>véhicules</term><term>x-by-wire.</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="fr">Nous montrons comment utiliser de façon optimale des unités tolèrantes aux fautes (Fault-Tolerant Units - FTU) pour se prémunir contre des perturbations en rafales sur un réseau TDMA. Deux objectifs sont étudiés. Si l'on veut minimiser la probabilité de perdre toutes les répliques d'un même message, la politique optimale est de répartir la transmission des répliques dans le temps. La preuve utilise des propriétés de convexité de la probabilité de perte. Au contraire, si l'on veut minimiser la probabilité de perdre une réplique ou plus, alors la solution optimale est de transmettre les répliques regroupées dans le temps. La preuve est basée sur une technique de majoration. Finalement, nous adaptons ces résultats au cas particulier du protocole TTP/C.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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