Relay Selection & Power Allocation for Maximizing Sum-Throughput of a Buffered Relay Network

TL;DR

This paper proposes new relay selection and power allocation schemes for buffered relay networks that significantly improve sum-throughput while satisfying minimum throughput and power constraints.

Contribution

It introduces two buffer-aware schemes, JPASS and RSS, for joint relay selection and power allocation, enhancing network throughput over existing methods.

Findings

Proposed schemes increase average sum-throughput by up to 40%.

Numerical results validate the effectiveness of JPASS and RSS.

The schemes effectively meet minimum throughput and power constraints.

Abstract

Considering two-hop cooperative communication with buffered half-duplex relays, this work jointly optimizes relay selection and transmit power at the relay to maximize the sum-throughput of the network subject to a minimum throughput requirement of each hop and transmit power constraint. The optimization problem is solved and two new buffer aware selection schemes, namely joint relay power allocation and selection scheme (JPASS) and ratio selection scheme (RSS) are proposed. Numerical results show that the average sum-throughput of both the proposed schemes is up to 40% higher compared to the existing schemes in the literature.