Adaptation de liens et mécanisme inter-couches pour les réseaux coopératifs

par Jun Chen

Thèse de doctorat en Informatique

Sous la direction de Kamel Barkaoui.

Soutenue en 2010

à Paris,CNAM .


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  • Titre traduit

    Link adaptation and cross-layer approach for cooperative networks


  • Résumé

    Cooperative transmissions gain much interest in modern communications due to improving the information transmission between source and destination via intermediate terminals. The main goal of this dissertation is to propose efficient link adaptation mechanisms using cross layer interactions in cooperative networks, where a set of relay terminals build up a virtual antenna array to enforce the signals from the source to destination for the important benefits gained by spatial diversity in the channel. We present a detailed performance evaluation for single-relay and multiple-relay cooperative schemes. The reliability of data transmissions can be improved by deploying distributed space-time code (DSTC) in the cooperation. Furthermore, a best relay selection and adaptive physical mode based link adaptation is developed to improve the throughput during the transmission. By analyzing the end-to-end instantaneous SNR value for cooperative transmissions at the receiver side, the optimal transmission rate for cooperative protocols can be decided. Finally, with the cooperative design at MAC layer, the knowledge of channel state can be used to realize the selection of relay and link adaptation in the current channel. This thesis shows that the link capacity performance in cooperative networks can be improved when the physical modes of the relays are well suited to the conditions of channel, and cross-layer strategies can be effective designed to furnish a better support of the quality of service.

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Informations

  • Détails : 1 vol. (161 p.)
  • Annexes : Bibliogr. p. 161

Où se trouve cette thèse ?

  • Bibliothèque : Conservatoire national des arts et métiers (Paris). Bibliothèque Centrale.
  • Non disponible pour le PEB
  • Cote : Th A 702
  • Bibliothèque : Conservatoire national des arts et métiers (Paris). Bibliothèque Centrale.
  • Disponible sous forme de reproduction pour le PEB
  • Cote : Th A 702 double
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