Research On Reliable Data Transmission In EH-WSN In Harsh Environment

With the wide application of Wireless Sensor Network(WSN),the industry has begun to apply ambient energy harvesting technology to solve the problem of energy supplementation for sensor nodes.Such networks are collectively referred to as energy harvesting wireless sensor networks(Energy Harvesting Wireless Sensor Network,EH-WSN).The reliable transmission of sensing data in energyharvesting wireless sensor networks is a problem worthy of study.In recent years,a few experts and scholars have also studied the reliability of data transmission.However,most of the existing work is aimed at WSNs with limited energy,and it is necessary to take into account node energy saving and reliable transmission.For EH-WSN,the existing reliable transmission protocols are not suitable for EH-WSN because the energy can be supplemented.Aiming at the above problems,this paper firstly collects the energy harvesting situation under different conditions in harsh environments by using solar panels,and summarizes and analyzes the energy harvesting characteristics.Secondly,based on the above energy harvesting characteristics,a reliable transmission protocol DAS-MAC(Dynamically Adjusts State MAC)based on the energy backoff hierarchical mechanism and the data acquisition hierarchical model is designed and evaluated.In this model,the ARQ information mechanism is used to ensure the reliability of data transmission,and at the same time,the node wake-up is performed on the basis of its own energy level and the level of collected data.On the basis of ensuring reliable data transmission,the data reception of sink nodes is effectively improved.The ability to realize reliable data transmission of EH-WSN in harsh environments.Through the comparative evaluation with the existing work,the results show that the DAS-MAC protocol ensures the reliable transmission of EH-WSN in harsh environments,and effectively improves the transmission capacity of data packets.