  High-definition (HD) map transmission is considered as a key technology for
automatic driving, which enables vehicles to obtain the precise road and
surrounding environment information for further localization and navigation.
Guaranteeing the huge requirement of HD map data, the objective of this paper
is to reduce the power consumption of vehicular networks. By leveraging the
mobile rule of vehicles, a collaborative vehicle to everything (V2X)
transmission scheme is proposed for the HD map transmission. Numerical results
indicate that the proposed scheme can satisfy the transmission rate requirement
of HD map with low power consumption.
