H ELECTRICITY
H04 ELECTRIC COMMUNICATION TECHNIQUE
H04W WIRELESS COMMUNICATION NETWORKS
H04W4/00 Services specially adapted for wireless communication networks; Facilities therefor
H04W4/30 Services specially adapted for particular environments, situations or purposes
H04W4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
H04W4/44 for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]