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- W2799149295 abstract "High-fidelity, real-time interactive applications are envisioned with the emergence of the Internet of Things (IoT) and tactile Internet by means of ultra-reliable low-latency communications (URLLC). Exploiting time diversity for fulfilling the URLLC requirements in an energy efficient manner is a challenging task due to the nontrivial interplay among packet size, retransmission rounds and delay, and transmit power. In this paper, we study the fundamental energy-latency tradeoff in URLLC systems employing incremental redundancy (IR) hybrid automatic repeat request (HARQ). We cast the average energy minimization problem with a finite blocklength (latency) constraint and feedback delay, which is non-convex. We propose a dynamic programming algorithm for energy efficient IR-HARQ optimization in terms of number of retransmissions, blocklength and power per round. Numerical results show that our IR-HARQ approach could provide around 25% energy saving compared to one-shot transmission (no HARQ)." @default.
- W2799149295 created "2018-05-07" @default.
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- W2799149295 date "2018-11-01" @default.
- W2799149295 modified "2023-09-24" @default.
- W2799149295 title "Energy-Latency Tradeoff in Ultra-Reliable Low-Latency Communication with Retransmissions" @default.
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