Cache content updating method, system and equipment based on information age and medium

The invention provides a cache content updating method, system and device based on information age and a medium, and relates to the field of edge caching, and the method comprises the steps: determining the transmission time delay of HDM cache content; the real-time AoI of the HDM cache content received by the vehicle-mounted user in the current system state space is updated by using the transmission time delay, the updated real-time AoI is generated, the communication extra request overhead is calculated, and the AoI overhead is determined; determining the total overhead of the system according to the communication extra request overhead and the AoI overhead so as to determine the future average cost of the vehicle-mounted user for the HDM cache content request; converting the future average cost into a reward function of deep reinforcement learning, and selecting a system action capable of maximizing a reward value of the reward function by using a deep reinforcement learning algorithm; executing the system