Adaptation des protocoles de communication conçus pour les IoT aux systèmes IoMT

Abstract

This work is part of the Internet of Things (IoT), and more specifically in the Internet of Multimedia Objects (IoMT). Compared to IoT, IoMT networks require a higher level of Quality of Service (QoS) in terms of bandwidth, jitter, reliability, data loss, delay, etc. Indeed, we propose to address the incapacity problems of IoT communication protocols to satisfy the QoS constraints of IoMT applications. To this end, starting in the first part with an optimization of the RPL routing protocol, which is one of the main components of LLNs in IoT, to adapt it to multimedia communications. Consequently, we have proposed in this thesis an improvement of this protocol called FreeBandWidth RPL allowing a better transfer of multimedia data in IoMT networks. It is based on the calculation of the bandwidth along the routing path and on an adaptive objective function to have a better load balancing between the different routing paths, in particular, during a multimedia data overload. In the second part, we proposed a new balanced extension of the DWRR scheduling algorithm, called Equilibrated Deficit Weighted Round Robin (EDWRR). EDWRR guarantees a reduced packet loss rate in each queue and this is mainly due to the process of interrupting the queuing so as to have a balanced packet loss rate. The implementation of the two solutions proposed in an emulator has proven that they are more efficient in comparison with competing scheduling protocols and algorithms.