V2X communication system with non-orthogonal multiple access: outage performance perspective

To achieve low-latency and high-reliability (LLHR) for applications in the vehicleto-everything (V2X) networks, the non-orthogonal multiple access (NOMA) is proposed for Long Term Evolution (LTE)as a promising technology. NOMA-V2X provides higher spectrum efficiency compared with the orthogonal multiple access (OMA) based V2X. The vehicles are expected to serve different services with variety of data transmission. The cluster of vehicles could be grouped to achieve better service from the transmitter sources. This study presents two-way relay assisted NOMA-V2X transmission by exploiting amplify-and-forward (AF) and full-duplex technique. We can benefits from potential applications of NOMA-V2X system with respect to serving massive users and adapting higher bandwidth efficiency. We derive expressions of outage probability to evaluate performance of two vehicles and to improve the quality of service (QoS) for the device with the poor channel conditions. The main investigation related two users’ performance which provides guidelines to design practical system. These expressions are further verified by Monte-Carlo simulations.