Optimal Retransmission Policies for Ultra-Reliable Low Latency Communications with Delayed Feedback
| Autor: | Thomas Varela, Richard Combes, Salah Eddine Elayoubi |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Network packet
business.industry Computer science Reliability (computer networking) Automatic repeat request Retransmission ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS 05 social sciences 020206 networking & telecommunications 02 engineering and technology Base station 0502 economics and business Telecommunications link 0202 electrical engineering electronic engineering information engineering Resource allocation Latency (engineering) business 050203 business & management Computer network |
| Zdroj: | GLOBECOM |
| DOI: | 10.1109/globecom38437.2019.9013987 |
| Popis: | We propose a novel resource allocation scheme for Ultra- Reliable and Low Latency communication (URLLC) traffic in the uplink of 5G systems. We consider industrial scenarios where a set of machines transmit packets intermittently to a central controller via a base station. We consider contention-based access in realistic scenarios where the delay budget and the 5G New Radio (NR) design allows the reception of few Acknowledgements (ACK), but always waiting for ACKs before retransmission is insufficient to ensure high reliability. This may be seen as a problem of Automatic Repeat Request (ARQ) with delayed feedback. The goal is to minimize the expected number of retransmissions subject to a reliability constraint within a delay budget. We derive the optimal policy that exploits the tradeoff between waiting for the ACK and achieving the target reliability. |
| Databáze: | OpenAIRE |
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