Cross-layer Optimization of Cooperative and Coordinative Schemes for Next Generation Cellular Networks PDF Download

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Cross-layer Optimization of Cooperative and Coordinative Schemes for Next Generation Cellular Networks

Cross-layer Optimization of Cooperative and Coordinative Schemes for Next Generation Cellular Networks PDF Author: Alaa Khreis
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Languages : en
Pages : 0

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Book Description
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.