Research On Data Stacking For Packet Priority In EH-WSN

In Wireless Sensor Network(WSN),researches related to energy saving have always been highly concerned by scholars.With the development of science and technology,the improvement of energy harvesting technology has effectively solved this problem.Energy harvesting technology enables nodes to collect energy from the surrounding environment and store excess energy for later use.This solution to effectively prolong network life has gradually formed a new research field with the deepening of research-Energy Harvesting Wireless Sensor Networks(EH-WSN).In EH-WSN,the research focus of network protocols has changed from "extending network lifetime" to "improving network performance",and many traditional protocols are no longer applicable to EH-WSN.In addition,due to the uncertainty of the network deployment environment,problems such as the failure of a certain node or its surrounding important neighbor nodes or the failure of the energy collector are caused.At this time,the data collected by the node may not be forwarded to the next hop node normally,resulting in data accumulation,which will inevitably affect the normal operation of the network.Therefore,it is particularly important to deal with the problem of data accumulation in EH-WSN.In this paper,a MAC protocol based on packet priority(DPP-MAC)in EH-WSN is proposed.The content mainly includes two parts:(1)Research on the channel allocation algorithm based on the residual energy of the node: according to the remaining energy and the number of active neighbor nodes of this node allocates channels to nodes,which makes it easier for nodes with larger energy to access the channel,and avoids accumulation of data during data transmission by low-energy nodes;(2)Stacked data transmission algorithm based on packet priority: Under the condition of dynamic energy harvesting,the priority of data packets is adjusted according to the current energy level of the node to improve network performance.By processing different priority data packets to increase the transmission power and forward at the same layer,the data stacked problem of each node is solved,the packet loss rate of the network is reduced,and the data transmission delay is reduced.The experimental evaluation results show that,compared with other existing algorithms,DPP-MAC has good results in network throughput,packet loss rate,average end-toend delay and channel utilization.