Random Linear Network Coding for Non-Orthogonal Multiple Access in Multicast Optical Wireless Systems

TL;DR

This paper explores the integration of Random Linear Network Coding with NOMA in optical wireless networks to enhance performance, demonstrating improved error rates and sum rates over traditional schemes.

Contribution

It introduces a novel RLNC-NOMA scheme for multicast optical wireless systems, addressing interference management with fixed power allocation and evaluating its performance.

Findings

RLNC-NOMA outperforms traditional NOMA in error rate and sum rate.

Fixed power allocation effectively manages interference.

Proposed scheme is suitable for high-density indoor optical wireless networks.

Abstract

Optical Wireless Communication networks (OWC) has emerged as a promising technology that enables high-speed and reliable communication bandwidth for a variety of applications. In this work, we investigated applying Random Linear Network Coding (RLNC) over NOMA-based OWC networks to improve the performance of the proposed high density indoor optical wireless network where users are divided into multicast groups, and each group contains users that slightly differ in their channel gains. Moreover, a fixed power allocation strategy is considered to manage interference among these groups and to avoid complexity. The performance of the proposed RLNC-NOMA scheme is evaluated in terms of average bit error rate and ergodic sum rate versus the power allocation ratio factor. The results show that the proposed scheme is more suitable for the considered network compared to the traditional NOMA and orthogonal transmission schemes.