Index Coded - NOMA in Vehicular Ad Hoc Networks

TL;DR

This paper introduces IC-NOMA, a novel approach combining index coding and NOMA to enhance spectral efficiency and reduce transmissions in vehicular ad hoc networks, validated through analytical studies.

Contribution

The paper proposes a new IC-NOMA technique that integrates index coding with NOMA, optimizing spectral efficiency and power savings in VANETs.

Findings

Improved spectral efficiency over conventional index coding.

Reduced number of transmissions with IC-NOMA.

Validated power savings through analytical analysis.

Abstract

The demand for multimedia services is growing day by day in vehicular ad-hoc networks (VANETs), resulting in high spectral usage and network congestion. Non-orthogonal multiple access (NOMA) is a promising wireless communication technique to solve the problems related to spectral efficiency effectively. The index coding (IC) is a powerful method to improve spectral utilization, where a sender aims to satisfy the needs of multiple receivers with a minimum number of transmissions. By combining these two approaches, in this work, we propose a novel technique called index coded NOMA (IC-NOMA), where we apply NOMA techniques on index coded data to reduce the number of transmissions further. This work shows that the IC-NOMA system demands a specific design for index codes to reap the advantages of NOMA. We have done the feasibility analysis of the proposed method in a general scenario and proposed an index code design to integrate IC over NOMA for the best efficiency. Through detailed analytical studies it is validated that the proposed transmission system provides improved spectral efficiency and power saving compared to conventional IC systems.