Ph.D. student under the direction of M. KOBAYASHI

Thesis title: On the use of Device-to-Device (D2D) in Wireless Networks

I received the B.E. degree from Ecole Centrale Electronique (ECE) Paris, France in 2015, and the M.Sc. degree in Systemes de Communications Numeriques jointly from Telecom-ParisTech (ex ENST) and University Pierre-et-Marie-Curie (UPMC), France, in 2015. I am currently pursuing the Ph.D. degree with CentraleSupelec and Orange Labs under the supervision of  Salah Eddine El Ayoubi, Richard Combes, Mari Kobayashi and Sofia Martinez Lopez.

The topic of my thesis is on the use of Device-to-Device (D2D) in wireless networks. In particular we answer to the questions:

  • "How D2D can help multicast network?"
  • "How D2D can help ultra reliable low latency communication (URLLC)?"
  • "How D2D can help device location accuracy?"

For example, in the first study, we consider a Device-to-Device (D2D) aided multicast channel, where a transmitter wishes to convey a common message to many receivers and these receivers cooperate with each other. We propose a simple computationally efficient scheme requiring only statistical channel knowledge at transmitter. Our analysis in general topologies reveals that, when the number of receivers K grows to infinity, the proposed scheme guarantees an average multicast rate of 1/2 log2(1 + ßlnK) with high probability for any ß ß' where ß' depends on the network topology. This scheme undergoes a phase transition at threshold ß' lnK where transmissions are successful/unsuccessful with high probability when the Signal to Noise Ratio (SNR) is above/below this threshold. We also analyze the multicast outage rate of the proposed scheme in the same setting. Extensions regarding firstly resource utilization and secondly considering the use of Hybrid Automatic Repeat Request (HARQ) is also analyzed.