A Joint Backscatter and VLC-NOMA Communication Scheme for B5G/6G umMTC System

This paper proposes a scheme of joint Backscatter communication (BAC) and Visible Light communication (VLC) based on Non-orthogonal Multiple Access (NOMA) for a Beyond-fifth-Generation(B5G)/Sixth-Generation (6G) ultramassive Machine-Type Communication (umMTC) system. In this proposal, a hybrid RF-VLC channel combined with NOMA supports multi-users gain data from server and sensor information from local IoT items simultaneously. Moreover, benefits from noninterference between RF-VLC channel and more time-frequency resource allocated to each user, the communication performance is improved. A simulation was implemented to verify and estimate our proposal. Results indicated that our proposal gained higher channel capacity and reach lower bit error rate (BER).