The Early-Warning Priority-Based ZigBee Sensor Network MAC Layer Backoff Algorithm
Liang Lishen · 2014
The early warning information of high priority packets in wireless sensor network needs to be transmitted quickly. And IEEE 802. 15. 4 protocol doesn't sustain any priority transmission mechanism. Based on this situation,an unslotted CSMA /CA adaptive adjustment of step backoff algorithm is proposed on early warning priority,and model Discrete time Markov analysis. Meanwhile,the channel access probability,network throughput and transmission delay are compared and analysed for the different priority nodes in network. Adaptive adjustment of the improved step backoff probability mechanism has positive effects on improving real time transmission performance of high priority packets in wireless network.