Massive Connectivity Provision for V2X Based on Low Power IoT Standards

Intelligent vehicles rely on ubiquitous sensing of the environment, where a large number of devices are deployed to collect data needed such that vehicle to everything (V2X) is enabled. To this end, simultaneous massive connectivity is required to render intelligent transportation, which is the main challenge in V2X network. This paper proposed using multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) to provide massive connectivity for V2X network, where the access point equipped with N r antennas to serve K devices simultaneously over a single time-frequency resource block (i.e., wireless channel). This setup leads to the development of MIMO-NOMA based on low power internet of things (IoT) standards such as IEEE 802.15.4 series, which means provision of V2X massive connectivity is easily enabled using off-the-shelf equipment. The analysis and numerical results confirm that the proposed method outperforms existing peers, while supporting a large number of devices.