Research And Improvement Of Wireless Sensor Networks Resource Based On Network Coding

In the era of the mobile Internet,wireless communication is one of the most important communication methods.Wireless sensor networks(WSN)are widely used in military,agricultural,industrial,home and other fields.As people's demand for wireless networks increases,how to use limited wireless Network resources improve network throughput and extend the network life cycle is a problem worth studying.The proposed network coding brings a new direction to the research of wireless sensor networks.This paper studies the opportunistic routing protocol and data retransmission scheme in WSN and the main research contents are as follows:At first,this paper studies the technical characteristics,application scope of WSN and technical principle of network coding.Based on the research of several typical routing metires,a new routing metric T?EEOR is designed to reduce the probability of network nodes with low residual power being selected to participate in the forwarding process.Secondly,this paper proposes an adaptive power opportunistic routing protocol(APEEOR)based on network coding for WSN systems with limited node energy.This protocol calculates the forwarding cost of nodes by searching for the best forwarding power,and finally determines the transmitting power of nodes and the actual forwarding node set.Experiments show that,on the basis of guaranteeing the data transmission rate,this protocol reduces the cost of forwarding messages to intermediate nodes and improves the survival time of WSN.Finally,in order to solve the problem of low efficiency of retransmission,this paper proposes a retransmission scheme based on set partitioning and network coding SPNCR,This solution first divides the lost data packets into multiple sets through a set partitioning algorithm and choose the best code package or maximum code package,secondly,this solution uses the cache of sending node to increase the occurrence probability of optimal coding package dynamically.Theoretical and experimental analysis show that SPNCR scheme can improve data retransmission efficiency,decrease the times of data forwarding and reducing the consumption of network resources in the retransmission.