Cross-layer optimization of cooperative and coordinative schemes for next generation cellular networks

Abstract : HARQ has become an important research field in the wireless digital communications area during the last years. In this thesis, we improve the HARQ mechanisms in terms of throughput and/or latency which are the bottleneck of next generation wireless communication systems. More precisely, we improve the time-slotted HARQ systems by mimicking NOMA, which means using superposed packets in a single-user context. In the first part of the thesis, we propose HARQ protocols using the help of a relay to improve the transmission rate and reliability. An enhanced HARQ protocol adapted to delayed feedback is proposed in the second part. In this new multi-layer HARQ protocol, additional redundant packets are sent preemptively before receiving the acknowledgement, and in superposition to other HARQ processes.
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Alaa Khreis. Cross-layer optimization of cooperative and coordinative schemes for next generation cellular networks. Networking and Internet Architecture [cs.NI]. Université Paris-Saclay, 2018. English. ⟨NNT : 2018SACLT011⟩. ⟨tel-01960207⟩

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