Green Ad-Hoc Communication System Based on NOMA Technique

Abstract

Ad-hoc networks incorporate a fast-developing research area with extensive spectrum applications. These networks contain multi-hop nodes that use wireless communication techniques for data transmission without any designated infrastructure. Its structure does not require an access point, which is easy to set up and consumes less power for communication purposes. Therefore, this chapter presents non-orthogonal multiple access (NOMA), including an energy-harvesting (EH) relaying system for a futuristic green ad-hoc communication system. We have considered the cognitive radio networks (CRNs) technique for designing the ad-hoc communication system. Relays cut down energy from the obtained NOMA radio frequency (RF) signal and choose the best relay for further communication through the decode-and-forward (DF) technique to users. We propose a system that works in two stages. During the 1st stage, all relays cut down energy from the obtained NOMA RF signal aired by the base station (BS). The 2nd stage splits into two equal intervals as one used for signal reception at all EH relays from BS and others for further aired signal to users through the best EH relay. The proposed system performance can be determined through closed forms of both users’ outage probabilities. Simulations out beats the existing orthogonal multiple access (OMA)-based relaying green ad-hoc CRNs. It also shows the duration of EH optimally impacts over proposed system performance. Results are validated through Monte-Carlo operations.