Time delay optimal caching and routing method, device and system based on cloud edge collaboration

The invention provides a time delay optimal caching and routing method, device and system based on cloud edge collaboration, and the method comprises the steps: receiving an access request sent by each vehicle-mounted terminal in the Internet of Vehicles in a current time slot, and analyzing the to-be-accessed target content from each access request; based on the transmission delay time and the stay delay time of each target content in the network model of the Internet of Vehicles, the attribute information of each target content and the service performance of each node and each physical link in the network model, constructing a time delay optimization model of the Internet of Vehicles; solving the time delay optimization model to obtain an optimal cache node and an optimal routing decision of each target content in the network model; and obtaining each target content from the optimal cache node according to the optimal routing decision, and returning each target content to the corresponding vehicle-mounted t