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Doctorate thesis defense of Leila Melki

Doctorate thesis defense on June 23th 2017 at 09H30 AM ,in Amphi I, Sup'Com.

Entitled :Radio Resource Management for Device-to-Device Communications Underlaying Network

Presented by : Leila Melki




Professor at SUP’COM, Tunisia





Dr. Soumaya HAMOUDA

Associate Professor at FSB, Tunisia



Dr. Kaouthar SETHOM

Associate Professor at ENICarthage, Tunisia


Prof. Tijani CHAHED

Professor at Telecom SudParis, France



Prof. Hichem BESBES

Professor at SUP’COM, Tunisia



Recently, the massive growth in mobile data traffic has gained a lot of attention. Operators will not be able to cope with the upcoming demands, with current infrastructure configuration and radio resources. Therefore, discussions of the next generation of mobile networks, known as the fifth generation (5G), become a necessity. In addition to more capacity, stringent requirements for increasing reliability, decreasing delays , and improving energy efficiency have been envisioned in 5G. Several solutions have been put forward, one of them being Device-to-Device (D2D) communications where mobile users in close proximity can communicate directly, bypassing the Base Station (BS) as in conventional cellular networks. Scalability and efficiency are therefore the main criteria for the development of future cellular systems, in which D2D communication is recognized as one of the promising technologies.

In this thesis, we identify compromises and challenges of integrating D2D communications into cellular networks and propose potential solutions. To maximize gains from such integration, resource management and interference avoidance are key factors.

The first part of this thesis deals with the Radio Resource Management (RRM) problems in Single-Hop (SH) D2D based on cellular networks. The main goal of this part, is to conduct a comprehensive study on the context-aware joint resource allocation and interference management problem in the next generation cellular networks assisted by single hop D2D communications under some Quality Of Service (QoS) constraints. Equally, we investigate some potential gains achievable by proper design and coordination of mode selection, pairing, interference management, power control and frequency resource allocation algorithms.

The second part of this thesis focuses on a more general framework where no longer talk about a single hop D2D communication but a Multi-Hop (MH) cooperative D2D communications. Multi-hop cooperative communications have been considered to increase the coverage range of D2D communications underlaying cellular networks. In this part, we make the single-hop D2D RRM algorithms proposed in the first part extensible to support network assisted multi-hop D2D communications. Hence, we accentuate the RRM for multi-hop D2D communications, the beneficial impact of multi-hop D2D integration in term of throughput, interference level and outage probability. It is shown that with this cooperation, we can potentially increase the number of connected devices, reduce the delay, increase the cell sum rate.


Radio Resource Management, Device-to-Device, LTE-A, Interference Avoidance, OFDM, FFR, Outage Probability.