For wireless sensor networks,traffic load of each node is changing with time and environment; adaptive inadequate also exists in traditional Carrier Sense Multi-channel Access (CSMA) protocol for channel access mechanisms.For these characteristics,under analyzes the shortcomings of the traditional CSMA protocols,to solve the problem of difficult to select the probabilities in the probabilistic CSMA protocol,the paper proposed the adaptive three-dimension probability CSMA (ATDP-CSMA) protocol based on adaptive mechanism,using the average cycle analysis method in the analysis of ATDP-CSMA protocol model,getting the precision expression of system throughput.Simulation results show that proposed protocol not only can be well adapted to the changes of the node traffic load but also can be maintained a relatively stable throughput even at a high load.
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2017, Vol. 45 
