Vehicular High-definition Maps Cache based on Dew Computing

The high-definition map required by autonomous driving can generate a huge amount of data transmission, in which the current networking system cannot support the massive transmission of such contents. In particular, when the vehicle is in an environment with poor network connection, the consequence of fetching the high-definition maps for vehicles can seriously affect the driving safety due to the packet drops and delay. In this paper, a vehicular edge caching architecture based on dew computing is proposed to ensure the driving safety of the vehicle. The proposed solution enables the vehicle's stability in obtaining the high-definition map under the poor network, as well as maintaining the freshness of the high-definition map stored by the vehicles.