publication . Conference object . 2018

Joint Optimization of Link Adaptation and HARQ Retransmissions for URLLC Services

Matha Deghel; Salah Eddine Elayoubi; Ana Galindo-Serrano; Raphael Visoz;
Open Access
  • Published: 26 Jun 2018
  • Publisher: IEEE
This work proposes a new joint link adaptation and HARQ (Hybrid Automatic Repeat Request) scheme for URLLC (Ultra-Reliable Low-Latency Communication) services. We consider the case where the transmitter knows only the average SNR (Signal-to-Noise Ratio) and not the instantaneous one. In the proposed scheme, the optimal maximum number of allowable HARQ transmissions and the optimal MCS (Modulation and Coding Scheme) level are determined for each packet to maximize the spectral efficiency. Our adopted approach exploits the channel diversity and increases the flexibility of the scheduling mechanism. Simulation results show that the proposed retransmission policy and link adaptation scheme increases the system performance in terms of spectral efficiency, while satisfying the latency and reliability constraints.
Persistent Identifiers
arXiv: Computer Science::Information Theory
ACM Computing Classification System: Data_CODINGANDINFORMATIONTHEORY
free text keywords: 5G, URLLC services, link adaption, hybrid auto- matic repeat request, Hybrid automatic repeat request, Transmitter, Computer science, Network packet, Spectral efficiency, Computer network, business.industry, business, Scheduling (computing), Communication channel, Retransmission, Link adaptation, 5G
Funded by
Fifth Generation Communication Automotive Research and innovation
  • Funder: European Commission (EC)
  • Project Code: 761510
  • Funding stream: H2020 | RIA
Validated by funder
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Conference object . 2018
Providers: ZENODO
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