Research On Internet Of Things Networking Technology Based On Optoelectronic Hybrid Communication

With the rapid development of information technology,the Internet of Things is rapidly gaining popularity in the society as a result of unstoppable momentum.It is hoped that after the Internet,it will once again set off a wave of technology and upgrade all walks of life to an unprecedented height.An undeniable fact is that the era of the Internet of Things has begun,and the amount of data is being produced at a speed that we could not imagine.In the past,radio transmission methods(ZigBee,Wi-Fi,Bluetooth,etc.)were limited in transmission rate and strained in spectrum resources,which could not meet the practical needs and became a bottleneck restricting the bandwidth development of the Internet of Things.Free space optical communication technology(FSO)has become one of the most competitive communication methods because of its advantages such as high frequency bandwidth,large information capacity,light weight,low power consumption and small volume.Based on the above discussion,this paper proposes a new type of Internet of Things network architecture based on wireless optical communication and supplemented by radio communication.This paper first proposes the overall framework of the Internet of Things for hybrid FSO/ZigBee systems.FSO is introduced to the ZigBee network to form a network model of the Internet of Things with both FSO and ZigBee communications.Then we analyze the influence of fog and rain weather in the atmosphere on FSO link and ZigBee link.The simulation results show that the attenuation of fog to laser is very serious,but the attenuation of rain to laser is very small,on the contrary,ZigBee is attenuated seriously by rainfall,but by fog is very small;Then the adaptive switching condition of hybrid FSO/ZigBee link system is analyzed,and a dual-threshold adaptive switching method is proposed.The simulation results show that with the change of rain and fog weather conditions,the proposed hybrid link system can successfully complete the link switching;In order to ensure that when the Internet of Things terminal position moves and the network changes dynamically,the main station and the mobile terminal can successfully complete the interconnection and the data service interaction smoothly.This paper presents a scheme of MF-TDMA two-dimensional MAC layer access in space-based network for optoelectronic hybrid Internet of Things.In order to support the dynamic mobility of the Internet of Things terminals and ensure that the master station and the node can successfully complete the interconnection and data service interaction,a scheme of applying the space-based network MF-TDMA two-dimensional MAC layer access technology to the optoelectronic hybrid Internet of Things is proposed.The simulation results show that the MF-TDMA access protocol can further improve the network throughput,reduce the average delay and reduce the collision probability compared with the CSMA/CA access protocol used in the traditional Internet of Things when the terminal moves dynamically and the network topology changes dynamically.