Research On Energy Harvesting Wireless Sensor Network Routing Algorithm

In recent years,wireless sensor networks?WSNs?has penetrated into all areas of our daily life,influencing and changing our lives.Wireless sensor network is a platform for access to information,and it is composed of many small nodes forming a self-organizing multi-hop wireless networks.In WSNs,the energy harvesting technology is a hot research question in recent years.The technology is that sensor nodes build with energy harvesting devices for the operation of harvesting energy from the surrounding environment.Traditional wireless sensor network nodes are powered by batteries,and its own energy is very limited,once the battery runs out of energy,the life of the network will be over.Using energy harvesting technology can alleviate or solve the problem fundamentally.The wireless sensor networks,which using Energy harvesting technologies is called energy harvesting wireless sensor networks?EH-WSNs?.The energy harvesting technology used in WSNs.Its working mechanisms and traditional WSNs is different,mainly in: the EH-WSNs nodes with energy harvesting properties.In this paper,we do the research of routing algorithm based on EH-WSNs node harvesting Characteristics.The main contents and results are as follows:1)Research on opportunistic routing algorithm issues based on EH-WSNs.For the characteristics of energy harvesting technology can extend the life of wireless sensor networks,this paper proposed EPOR?Energy Potential Opportunistic Routing?routing algorithm.the points of EPOR are: First,introduce a potential function for calculating the energy potential of the node.Then,calculate the expected number of transmissions ETX?Expected Transmission Count?.Finally,use the potential energy of the node and ETX to determine the delay time of the node after it receives a packet.The node with the shortest delay time is the best forwarding node for the sending node.Simulation results show that,compared with OR and EAOR,EPOR has a higher network lifetime.2)Research on AODV routing algorithm issues based on EH-WSNs.Binding the characteristics of energy harvesting node,this paper presents EP-AODV?Energy Potential AODV?routing algorithm.the EP-AODV routing algorithm uses a delay mechanism.When the node receives data from the upstream node,the node will not forward the data immediately,but a delay before forwarding.Points of the routing algorithm is: First,calculate the potential energyof the node.Secondly,compute the average potential energy of the link between the source node and the local node.Then,compare the energy potential of the node and the average potential energy,chose the minimum value E_min.Finally,E_min and packet loss rate together determine the delay time of the node.The first path build by the node which arriving the destination node firstly is the final route.Theoretical analysis and simulation results show that,compared with traditional AODV and EA-AODV,EP-AODV has longer network lifetime,greater network throughput and more balanced network load.The EPOR and EP-AODV routing algorithm proposed in this paper has important theoretical and practical value in improving the lifetime of the network,balancing network load and increasing network throughput.