On the Performance of the Relay-ARQ Networks

TL;DR

This paper analyzes the performance of relay networks employing hybrid ARQ protocols with adaptive power allocation, examining throughput and outage probability under various fading conditions and power constraints.

Contribution

It provides a comprehensive analysis of relay-ARQ network performance considering adaptive power allocation and different fading scenarios, which was not extensively studied before.

Findings

Adaptive power allocation improves relay-ARQ efficiency.

Relay-ARQ protocols outperform non-adaptive schemes in various conditions.

Performance varies with fading correlation and power constraints.

Abstract

This paper investigates the performance of relay networks in the presence of hybrid automatic repeat request (ARQ) feedback and adaptive power allocation. The throughput and the outage probability of different hybrid ARQ protocols are studied for independent and spatially-correlated fading channels. The results are obtained for the cases where there is a sum power constraint on the source and the relay or when each of the source and the relay are power-limited individually. With adaptive power allocation, the results demonstrate the efficiency of relay-ARQ techniques in different conditions.