Optimization method of non-channel way CSMA-CA (Carrier Sense Multiple Access-Conflict Avoidance) algorithm based on IEEE802.15.4 standard

摘要: The invention discloses an optimization method of a non-channel way CSMA-CA (Carrier Sense Multiple Access-Conflict Avoidance) algorithm based on IEEE802.15.4 standard. In the method, setting prior transmission right grade is introduced so that node data frames can be sent once to reduce nodes used by channel competition and delay waste brought competition; receipt ACK response into flow success or failure sending judged communication process more complete; during cancelling occupation cancelled, thenumber backoff non-competition avoided bebeing increased, probability easily occurred reduced, one-to-one useful load rate improved from themaximum 120kb/s maximum 180kb/s, also reach over 150kb/s under condition multiple simultaneously send requests, thereby greatly enhancing effective utilization ratio channels.