Power Allocation for ARQ Two-Hop Cooperative Networks for Ultra-Reliable Communication
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Date
2020-07
Department
Sergiy Vorobyov Group
Distributed and Networked Control Systems
Dept Signal Process and Acoust
Department of Electrical Engineering and Automation
Distributed and Networked Control Systems
Dept Signal Process and Acoust
Department of Electrical Engineering and Automation
Major/Subject
Mcode
Degree programme
Language
en
Pages
7
Series
Proceedings of the 2020 IEEE International Conference on Communications, ICC 2020, IEEE International Conference on Communications
Abstract
We analyze the performance of amplify-and-forward (AF) automatic repeat request (ARQ) for a two-hop cooperative system with reliability constrains. For this setup, we first derive the closed-form outage probability expression. Next, we present a power allocation scheme that allows us to achieve a target outage probability, while minimizing the outage-weighted average power expenditure for asymmetric power allocation between the source and relay. This is cast as an optimization problem, and the optimal power allocation (OPA) is obtained in closed form by invoking the Karush-Kuhn-Tucker (KKT) conditions. We evaluate numerically the OPA strategy between different AFARQ transmission rounds and we show that the proposed scheme provides large power gains with respect to the optimized pointto-point ARQ scheme, as well as with respect to the equal power allocation (EPA) strategy.Description
Keywords
Relays, Power system reliability, Probability, Resource management, Reliability, Protocols, Optimization
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Citation
Dosti , E , Charalambous , T & Wichman , R 2020 , Power Allocation for ARQ Two-Hop Cooperative Networks for Ultra-Reliable Communication . in Proceedings of the 2020 IEEE International Conference on Communications, ICC 2020 . , 9149234 , IEEE International Conference on Communications , IEEE , IEEE International Conference on Communications , Dublin , Ireland , 07/06/2020 . https://doi.org/10.1109/ICC40277.2020.9149234
