@inproceedings{43d3f1ba862d4b36964acb1e284712d7,
title = "Power Allocation for ARQ Two-Hop Cooperative Networks for Ultra-Reliable Communication",
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.",
keywords = "Relays, Power system reliability, Probability, Resource management, Reliability, Protocols, Optimization",
author = "Endrit Dosti and Themistoklis Charalambous and Risto Wichman",
year = "2020",
month = jul,
doi = "10.1109/ICC40277.2020.9149234",
language = "English",
series = "IEEE International Conference on Communications",
publisher = "IEEE",
booktitle = "Proceedings of the 2020 IEEE International Conference on Communications, ICC 2020",
address = "United States",
note = "IEEE International Conference on Communications, ICC ; Conference date: 07-06-2020 Through 11-06-2020",
}