Wearable device wireless time synchronization method based on physical layer cross-technology communication

The invention discloses a wearable device wireless time synchronization method based on physical layer cross-technology communication. The method comprises the following steps: setting an initial value; the wearable device monitors a channel and prepares to receive a cross-technology synchronization frame broadcasted by the WiFi coordinator; a cross-technology synchronization frame is generated and broadcasted based on the WiFi coordinator, and the cross-technology synchronization frame carries a timestamp of the wearable device; the wearable device receives the cross-technology synchronization frame and obtains local time and the signal quality of the cross-technology synchronization frame, and the local time is the time when the wearable device receives the cross-technology synchronization frame; the WiFi coordinator is judged, the optimal signal quality is obtained, and timing of the frame receiving time interval of the current round is stopped; the wearable device verifies the cross-technology synchroniza