, Si les données sont reçues correctement par la destination

, CH d envoie un paquet RFR (Request For Relay) demandant l'aide de ses voisins

, Chaque noeud voisin peut déduire alors son ? 2j (le SNR par rapportàrapportà la destination)

, // les noeuds voisins ayant une qualité du canal vers la destination inférieurè a un seuil donné ou ayant uné energie résiduelle inférieure au seuil fixéfixéà l'avance se retirent de la sélection

, Les voisins concernés calculent leurs temporisateurs ? j selon l'´ equation

/. Le, relais ayant calculé le ? j le plus court relaye le paquet vers le CH d selon la valeur de son ? 1j

, Sinon //(? 1j < ? th

. Le-relais-utilise-la and . De-transmettre-le,

, CH d combine les deux paquets reçus en utilisant la technique MRC afin de produire une version du paquet sans erreurs

, Etude analytique de l'approche XL-CLEACH, vol.6

A. Ben-ammar, D. Ali, M. Terre, and Y. Habib, Cross-Layer Approach for Energy Minimization in Wireless Sensor Networks, Wireless Personal Communications, vol.98, pp.2211-2221, 2018.

, Conférences internationales avec comité de lecture

A. Ben-ammar, D. Ali, M. Terre, and Y. Habib, Hybrid AF/DF based MAC Protocol over Shadowed Channels for Wireless Sensor Networks, International Conference on Software, Telecommunications and Computer Networks, 2018.

A. Ben-ammar, D. Ali, M. Terre, and Y. Habib, Multi-Hop LEACH based Cross-Layer Design for Large Scale Wireless Sensor Networks, 2016 International Wireless Communications and Mobile Computing Conference (IWCMC), pp.763-768, 2016.
URL : https://hal.archives-ouvertes.fr/hal-01474624

A. Ben-ammar, B. Olfa, D. Ali, M. Terre, and Y. Habib, Performance analysis of AODV and AOMDV over SMAC and IEEE 802.15.4 in Wireless Multimedia Sensor Network, 2015 International Wireless Communications and Mobile Computing Conference (IWCMC), pp.1464-1468, 2015.

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A. Ben-ammar, A. Dziri, M. Terre, and H. Youssef, Résumé Les réseaux de capteurs sans fil (RCSF) sont des réseaux ad hoc, généralement constitués d'entités autonomes miniaturisées, appelées noeuds capteurs qui peuvent communiquer entre eux par liaisons radio. Les RCSF ont suscité beaucoup d'engouements dans la recherche scientifique, en raison notamment des nouveauxprobì emes de routage sous forte contraintes de, pp.1-11, 2017.

, Elle est basée sur l'´ echange du SNR (Signalto-Noise-Ratio) entre la couche réseau et la couche physique. NousévaluonsNousévaluons, sous le simulateur NS-2, les performances de notre approche XL-AODV. Une analyse comparative avec AODV, a montré, pour différentes configurations de réseaux, l'efficacité de notre proposition, en termes de gainsénergétiquesgainsénergétiques et de latence de bout en bout. Pour ladeuxì eme partie, nous proposons unepremì ere approche XL-LEACH qui est une amélioration de la version originale de LEACH, en l'adaptant aux réseaux de capteurs densesàdensesà grandé echelle, tout en tenant compte des caractéristiques de la couche physique, modélisée par la distribution K. Dans unetroisì eme partie, nous introduisons une amélioration de XL-LEACH par l'approche dite, Ce type de réseau diffère des réseaux filaires par ses caractéristiques et limitations, qui ont motivé le développement d'une nouvelle approche de conception cross-layer, ignorant certains paradigmes de l'approche classique et permettant l'´ echange mutuel d'informations, même entre couches non adjacentes

, Mots clés : RCSF, Cross-layer, Consommation d'´ energie, durée de vie, distribution K, outil de simulation NS-2, communication coopérative