A Novel Resource Sharing Scheme for Vehicular Communication in 5G Cellular Networks for Smart Cities

Intelligent transportation systems (ITS) in smart cities offer extensive network coverage and simultaneous connections, even in high-mobility scenarios within the IoT network. This way, 5G technology will become a key enabler for IoT and ITS by allowing massive vehicular connections, high throughput, low latency, and wide coverage. Thus, resource sharing becomes very important in dealing with massive IoT connections in ITS and providing efficient communication among vehicles for smart cities. We propose a resource-sharing scheme for Cellular-vehicle-to-everything (C-V2X) communication in 5G cellular networks for smart cities, having two groups of users: Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I). Our primary goal is to maximise the throughput of V2V pairs and V2I users while preserving the QoS for both users. The maximisation problem formulated is non-convex and is solved using the Lagrange multiplier method by optimizing the transmit power of both V2V and V2I users. The overall system performance is evaluated in terms of throughput of V2V and V2I users for different SINR, number of vehicles, velocities, and transmit power of vehicular users. Furthermore, the EE of V2V communication is analyzed in terms of the transmit power of VUs. Also, the proposed resource-sharing scheme is compared with the existing schemes, demonstrated through simulations.