Feedback Prediction for Proactive HARQ in the Context of Industrial Internet of Things
| Autor: | Thomas Schierl, Tatiana Rykova, Baris Goktepe, Cornelius Hellge, Thomas Fehrenbach |
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| Rok vydání: | 2020 |
| Předmět: |
Signal Processing (eess.SP)
Orthogonal frequency-division multiplexing Computer science Network packet Reliability (computer networking) Real-time computing Hybrid automatic repeat request 020302 automobile design & engineering 020206 networking & telecommunications Context (language use) 02 engineering and technology Systems and Control (eess.SY) Electrical Engineering and Systems Science - Systems and Control Block Error Rate 0203 mechanical engineering 0202 electrical engineering electronic engineering information engineering FOS: Electrical engineering electronic engineering information engineering Electrical Engineering and Systems Science - Signal Processing Processing delay Decoding methods |
| Zdroj: | GLOBECOM |
| DOI: | 10.48550/arxiv.2009.06301 |
| Popis: | In this work, we investigate proactive Hybrid Automatic Repeat reQuest (HARQ) using link-level simulations for multiple packet sizes, modulation orders, BLock Error Rate (BLER) targets and two delay budgets of 1 ms and 2 ms, in the context of Industrial Internet of Things (IIOT) applications. In particular, we propose an enhanced proactive HARQ protocol using a feedback prediction mechanism. We show that the enhanced protocol achieves a significant gain over the classical proactive HARQ in terms of energy efficiency for almost all evaluated BLER targets at least for sufficiently large feedback delays. Furthermore, we demonstrate that the proposed protocol clearly outperforms the classical proactive HARQ in all scenarios when taking a processing delay reduction due to the less complex prediction approach into account, achieving an energy efficiency gain in the range of 11% up to 15% for very stringent latency budgets of 1 ms at $10^{-2}$ BLER and from 4% up to 7.5% for less stringent latency budgets of 2 ms at $10^{-3}$ BLER. Furthermore, we show that power-constrained proactive HARQ with prediction even outperforms unconstrained reactive HARQ for sufficiently large feedback delays. |
| Databáze: | OpenAIRE |
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