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Un protocole de fiabilité basé sur un code à effacement "on-the-fly"

Pierre Ugo Tournoux 1
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : Transport protocol area has significantly evolved this last decade. Indeed, several TCP variants or minor enhancements have been proposed at the IETF. These multiple proposals can be explained by the numerous kind of access links in terms of bandwidth, loss rate and delay available today which allowed, for instance, the emergence of challenged networks. Furthermore, the Internet usage has also evolved. Although this network does not provide any guarantee, multimedia applications are pervasive today and Internet is used to carry delay constrained flows generated by Voice over IP or video-conferencing applications. Despite of this evolution, the reliability layer of transport protocols did not evolved and remains based on ARQ schemes. In this context, this thesis explores a novel erasure code concept named Tetrys which can be used as a generic reliability mechanism able to perform over both best effort and challenged networks. After a thorough study which both highlights the benefits brought by Tetrys and dissects its major characteristics (rate-less code, full-reliability capable, nearly optimal decoding delay), we illustrate its versatile behavior with several contributions in various domains. In particular, we present possible use of Tetrys by applying it to video-conferencing applications, Delay Tolerant Mobile Networks streaming applications and handovers management. As a prospective work, this thesis tackles existing issues from anarchic networks (i.e. networks characterized by an absence of congestion control). In this context, we propose a Tetrys-based optimal transmission mechanism for such networks and show that Tetrys is able to complete congestion-less protocol stack and allows the deployment of anarchic networks as an alternative to congestion controlled networks in terms of efficiency and fairness.
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Contributor : Arlette Evrard <>
Submitted on : Wednesday, December 15, 2010 - 1:12:06 PM
Last modification on : Monday, October 19, 2020 - 11:05:36 AM
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  • HAL Id : tel-00547003, version 1


Pierre Ugo Tournoux. Un protocole de fiabilité basé sur un code à effacement "on-the-fly". Informatique [cs]. Université Paul Sabatier - Toulouse III, 2010. Français. ⟨tel-00547003⟩



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