# Study of Max-Link Relay Selection with Buffers for Multi-Way Cooperative Multi-Antenna Systems

## TL;DR

This paper introduces a novel relay selection strategy called MW-Max-Link for multi-way cooperative multi-antenna systems, leveraging buffers and network coding to improve communication efficiency and performance.

## Contribution

It proposes a new multi-way relay selection method based on link quality, incorporating buffers and physical-layer network coding, with comprehensive performance evaluation.

## Key findings

- MW-Max-Link outperforms existing techniques in bit error rate.
- The proposed method achieves higher sum rate.
- It maintains manageable computational complexity.

## Abstract

In this paper, we present a relay-selection strategy for multi-way cooperative multi-antenna systems that are aided by a central processor node, where a cluster formed by two users is selected to simultaneously transmit to each other with the help of relays. In particular, we present a novel multi-way relay selection strategy based on the selection of the best link, exploiting the use of buffers and physical-layer network coding, that is called Multi-Way Buffer-Aided Max-Link (MW-Max-Link). We compare the proposed MW-Max-Link to existing techniques in terms of bit error rate, pairwise error probability, sum rate and computational complexity. Simulations are then employed to evaluate the performance of the proposed and existing techniques.