ComNum - Séminaires

Le 23/11/2017 [ComNum PhD's seminar] Energy-Latency Tradeoff in URLLC with Short-Length packets

Auteur(s) & Affilliation(s) du séminaire :

Avranas Apostolos

Présentation du séminaire :

in A301 at 1.30pm


Abstract: Emerging mobile networks (5G new radio) are envisioned to support mission-critical Internet-of-Things (IoT) applications (e.g., industrial control, automated transportation and robotics) and ultra-reliable low-latency communication (URLLC) scenarios with strict requirements in terms of latency (ranging from 1 ms and below to few milliseconds) and reliability (higher than 99.999%). This entails a fundamental paradigm shift from throughput-oriented system design towards holistic designs for guaranteed and reliable end-to-end latency. In this talk, we consider a URLLC system with short packets employing hybrid automatic repeat request (HARQ). We study the fundamental energy-latency tradeoff and analyze the energy consumption for incremental redundancy (IR) HARQ and compare it to the no HARQ case. Moreover, we derive closed-form expressions for the outage probability of IR-HARQ with both variable finite-length codewords and power. Our results show that when the feedback delay is more than half the latency constraint, it is beneficial in terms of energy to use one-shot transmission (no HARQ). This is joint work with Marios Kountouris (Huawei France) and Philippe Ciblat (Telecom ParisTech).

Contact(s) :

Ciblat Philippe

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