# Non-Orthogonal Multiple Access combined with Random Linear Network Coded Cooperation

## TL;DR

This paper proposes a novel scheme combining non-orthogonal multiple access and random linear network coding to improve reliability in relay-assisted communications, with an analytical framework and performance comparison.

## Contribution

It introduces a new hybrid scheme that integrates NOMA and RLNC for relay networks, providing analytical performance characterization and benchmarking against orthogonal schemes.

## Key findings

- Enhanced reliability without throughput loss
- Analytical model matches simulation results
- Outperforms orthogonal access schemes in key metrics

## Abstract

This letter considers two groups of source nodes. Each group transmits packets to its own designated destination node over single-hop links and via a cluster of relay nodes shared by both groups. In an effort to boost reliability without sacrificing throughput, a scheme is proposed, whereby packets at the relay nodes are combined using two methods; packets delivered by different groups are mixed using non-orthogonal multiple access principles, while packets originating from the same group are mixed using random linear network coding. An analytical framework that characterizes the performance of the proposed scheme is developed, compared to simulation results and benchmarked against a counterpart scheme that is based on orthogonal multiple access.