age as the 5G technologies are designed and deployed. 3GPP evolved V2X (eV2X) has identified several new use cases/applications as follows [1,21,25,26]: Vehicle-to-Everything (V2X) Communications 793 Platooning: In this scenario, vehicles (dynamically) form a platoon while moving together in the same direction. Vehicles in the platoon obtain information from the lead- ing vehicle for managing the platoon. Platooning allows the vehicles to form a tightly coordinated group with significantly reduced inter-vehicle distance, thus increasing road capacity and efficiency. It also improves fuel efficiency, reduces accident rate, and enhances productivity by allowing the drivers to perform other tasks. Vehicles within a platoon must be able to frequently exchange information (e.g., to share information such as vehicle's speed and direction) and to send event notifications such as the intent for braking or acceleration. There are several aspects of platooning that must be sup- ported through reliable V2V communications such as joining and leaving a platoon; that is, to allow a vehicle to signal its intention to join or to leave a platoon at any time while the platoon is active, and to support additional signaling in order to complete join/leave operations; announcement and warning to indicate formation and existence of the platoon SO that nearby vehicles can select to join the platoon or to avoid disruptions to the platoon; steady-state operation group communication to support the exchange of platoon management messages and further to indicate braking, acceleration, road selec- tion, change of platoon leader, etc. Given the small target inter-vehicle distance while the vehicles are traveling at relatively high speed, V2V communication must be able to support reliable and secure message exchange to ensure effective and safe platooning operation. The following are some key V2V communication requirements in order to support platooning [13,14]: 25 ms end-to-end communication latency among a group of vehicles (10 ms for the hi