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Adaptabilité des flux multimédia appliquée au télé-diagnostic médical

Abstract : In the medical area, most of medical facilities (hospitals, clinics, ldots) use distributed applications in the context of telemedecine.As information security is mandatory, these applications must be able to cross the security protocols (secured gateways like proxies, firewalls, ldots). User Datagram Protocol (UDP), which is classically recommended for videoconferencing applications, does not cross firewalls or proxies unless explicitly configured fixed ports are declared. These fixed ports are considered as a security breach.In this thesis, we propose a novel platform called VAGABOND (Video Adaptation framework, crossing security GAteways, Based ON transcoDing) which works, in a very efficient and original way; on TCP (Transmission Control Protocol). VAGABOND is composed of Adaptation Proxies (APs), which have been designed to take into consideration medical experts videoconferencing preferences, device heterogeneities, and network dynamic bandwidth variations. VAGABOND is able to adapt itself at the user and network levels.The cumulative binomial probability law and the Bayesian inference on a binomial proportion are used to trigger user profile adaptations. In fact, we aim at being more tolerant to severe network bandwidth variations. With a finer precision and following these probability laws, user profile adaptation is only triggered when severe network congestions arise. However, as TCP is a reliable transport protocol, we needed to design and to employ new intelligent adaptation strategies together with data transmission in order to cope with latency issues and sockets timeout.
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Submitted on : Tuesday, October 9, 2018 - 1:10:07 PM
Last modification on : Thursday, November 12, 2020 - 9:42:15 AM


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  • HAL Id : tel-01891192, version 1


Ronnie Muthada Pottayya. Adaptabilité des flux multimédia appliquée au télé-diagnostic médical. Performance et fiabilité [cs.PF]. Université Bourgogne Franche-Comté, 2017. Français. ⟨NNT : 2017UBFCD056⟩. ⟨tel-01891192⟩



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