Slotted CSMA-CA (carrier sense multiple access with collision avoidance) backoff algorithm based optimization method

The invention discloses a slotted CSMA-CA (carrier sense multiple access with collision avoidance) backoff algorithm based optimization method. Priority settings are introduced to enable important command frames and short data frames of a sending node to be sent as soon as possible and data frames to be all sent at one time as soon as possible, and nodes used for channel competition and time delay caused by competition are decreased; the receiving and incorporating process of the frames is confirmed, success or not in sending is judged, and the communication process is more complete; a dynamic adjustment macMinBE method is adopted, the BE initial value is set, and adaptive adjustment is performed according to network load, idle and busy conditions of channels of previous task transmission and success or not in task sending; when the channels are busy, the value of macMinBE is increased, and probability of data collision can be reduced; when the channels are idle, the value of macMinBE is decreased, backoff ti