Semantically distinguished satellite-ground fusion network scheduling method

The invention relates to a semantic distinguishing satellite-ground fusion network scheduling method, and belongs to the field of satellite Internet of Things. The method comprises the following steps: S1, awareness of satellite-ground link attributes; s2, evaluating service flow and user service quality; s3, a satellite-ground access and switching decision is made; and S4, carrying out DDPG intelligent flow distribution. The method comprises the following steps: S1, calculating a satellite-ground link attribute between a ground node and a visible satellite in real time; s2, sensing semantic features of to-be-transmitted service traffic of a ground user and evaluating QoS requirements of the ground user for different network performance indexes; s3, selecting a proper satellite to make an access or switching decision based on the satellite-ground link attribute of the visible satellite and the QoS demand of the user; and S4, allocating the flow to be transmitted on the to-be-switched or access link in advance