Bandwidth dynamic adjustment system and method based on frame reservation

The invention provides a bandwidth dynamic adjustment system and method based on frame reservation. The system comprises a bus and a plurality of pieces of equipment connected to the bus, and if at least one piece of equipment needs to send a communication data message, the equipment needing to send the communication data message performs the following operations: the transmission duration of thecommunication data message to be sent is carried in a sending frame reservation message; counting and summing the transmission durations of the communication data messages of all the devices, and taking the summed value as the sub-period duration of the communication data messages; sending the communication data message according to a certain sequence based on the starting moment of the current communication scanning period; wherein the communication scanning period duration is the sum of the frame reservation message sub-period duration and the communication data message sub-period duration,the frame reservation mess