Aiming at the problem of low efficiency of wireless sensor networks（ WSNs） over-the-air node mirroring program update

based on Jennic development platform

a multi-node synchronous

efficient and reliable remote update scheme for small-scale ZigBee networks is designed and improved based on Markov chain mathematics model

the IEEE 802. 15. 4 CSMA/CA algorithm is optimized and then simulated and verified on the Jennic JN5168 sensor node. Compared with the original remote update technology

the improved algorithm can increase the network throughput by 0. 28 bit/s

and the network delay is reduced from 0. 029 s to 0. 024 s

which proves that the algorithm is feasible in improving the update efficiency of nodes.