Research on improving MAC protocol in ZigBee network

The super-frame scheduling mechanism for wireless sensor networks under a tree structure for wireless communication is studied in this paper, conflict of cluster tree network and exposed node problem research, put forward a set of analysis theory and criterion, and then a GTS slot and scheduling algorithm based on differentiated services. Simulation tests are carried out using the NS2 software, the results show that the algorithm can make use of the channel fully, the rational allocation of time slots, to avoid unnecessary conflict in communication, increasing the throughput, reducing the packet loss rate and stablizing network delay has obvious effect.