3GPP NR V2X Mode 2d: Analysis of Distributed Scheduling for Groupcast using ns-3 5G LENA Simulator

Vehicle-to-everything (V2X) communication is a key technology for enabling intelligent transportation systems (ITS) that can improve road safety, traffic efficiency, and environmental sustainability. Among the various V2X applications, platooning is one of the most promising ones, as it allows a group of vehicles to travel closely together at high speeds, reducing fuel consumption and emissions. However, it poses significant challenges for wireless communication, such as high reliability and low latency. In this paper, we evaluate the benefits of group scheduling, also referred to as Mode 2d, which is based on a distributed and scheduled resource allocation scheme that allows the group of cars to select resources from a configured pool without network assistance. We evaluated the scheme through simulations, and the results show that this approach can meet the reliability, low latency, and data rate requirements for platooning.