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Performances théoriques et analyse des schémas HARQ dans un contexte d'optimisation inter-couches

Abstract : This thesis deals with the performance closed-form derivations and the analysis of Hybrid ARQ retransmission schemes in a cross-layer context. Hybrid ARQ mechanism enables us to take benefit from the properties of both ARQ and FEC according to the SNR value. As a consequence, the total amount of transmitted redundancy is automatically adapted to the channel quality, based on the acknowledgment of the previous transmission. Actually, since all the systems operate or are going to operate under IP, it is of interest to evaluate their performance at the IP layer. The metrics considered here are the Packet Error Rate, the efficiency, the delay and the jitter. These four metrics are useful since the different QoS requirements depend on a combination of them. However, in the literature, the performance of HARQ based systems are mainly analyzed at the MAC level only. Furthermore, the analyses are often carried out by means of simulations. The goal is then here to derive the four performance metrics for any HARQ mechanism, at both MAC and IP level, by taking into account some existing optimizations between the IP and MAC layers. Our theoretical derivations are proven to be useful for building algorithms dedicated to radio resource management as well as to unequal data protection.
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Submitted on : Friday, April 16, 2010 - 8:00:00 AM
Last modification on : Friday, July 31, 2020 - 10:44:07 AM
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  • HAL Id : pastel-00005994, version 1



Aude Le Duc. Performances théoriques et analyse des schémas HARQ dans un contexte d'optimisation inter-couches. domain_other. Télécom ParisTech, 2010. Français. ⟨pastel-00005994⟩



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