Power Allocation for ARQ Two-Hop Cooperative Networks for Ultra-Reliable Communication
A4 Artikkeli konferenssijulkaisussa
Proceedings of the 2020 IEEE International Conference on Communications, ICC 2020, IEEE International Conference on Communications
AbstractWe 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.
Relays, Power system reliability, Probability, Resource management, Reliability, Protocols, Optimization
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