Research On High Reliable Data Transmission Technology In Wireless Sensor Networks

Now,with the rapid development of Internet communication technology,Internet of things technology has become an important part of the new generation of information technology.Wireless Sensor Network(WSN),as an important technology of the Internet of things(IoT),has become a hot research field.With the wide application of WSN,the requirement for reliable data transmission in each application scenario is increasing.Wireless Sensor Network(WSN)is easily affected by many unfavorable factors,such as application field environment,limited network node performance,more transmission paths and irregular node movement,etc.,data transmission is prone to errors,redundancy,high energy consumption and other problems,which cannot guarantee the reliable transmission of data,resulting in data explosion and transmission confusion in the network system,which makes the data collection at the bottom layer of the internet of things unable to complete.Therefore,how to improve the reliability of wireless sensor network data transmission has become a hot issue.Wireless Sensor Network(WSN)is easily affected by the scene environment and other factors in the process of data transmission.By summarizing the existing research on the reliability of data transmission in WSN,we can see that among various complex factors,the network energy consumption of transmission link and the network congestion of message queue of nodes are the most important factors affecting the reliability of data transmission.Excessive network energy consumption will over-occupy the limited network resources,lead to high data transmission load,resulting in disorder error;network congestion will directly block the storage space of sensor nodes,resulting in message delay,resulting in data explosion.Therefore,the key to guarantee the reliability of data transmission in wireless sensor networks is to reduce the energy consumption of the whole transmission link and to solve the network congestion in the message queue.Based on the analysis of the existing research methods in related fields,this paper presents the corresponding research objectives and solutions to the two key factors that affect the reliable data transmission in wireless sensor networks,so as to improve the reliability of network data transmission.The main work and contributions of this paper are as follows:(1)In order to solve the problems of dynamic topology and high energy consumption in wireless sensor networks,a low energy data forwarding route is proposed in this paper.In wireless sensor networks,the constant random movement of nodes makes the network topology unable to use the traditional static computing method,and the dynamic network topology will bring high network overhead.To solve this problem,this paper proposes a low-energy data forwarding routing scheme which can statically transform dynamic network.Firstly,using the method of data transmission based on assistant,the position information of sensor nodes and the mobile sink nodes are introduced as assistant of communication model in wireless sensor networks,and then the basic communication model is established by using time extension graph Finally,the minimum cost flow algorithm is combined with the time-spread graph communication model to find the least network overhead data transmission path on the time axis through feasible flow calculation.(2)Aiming at the irregular data acquisition and transmission in wireless sensor networks,which is prone to network congestion,an efficient network congestion control mechanism is proposed.In consequence of the irregular mobility of wireless sensor network nodes,network topology changes dynamically,and the adaptive ability of network nodes is limited,it is impossible to control the instantaneous queue length of network nodes in a safe range with high precision.In order to solve the problem of low precision,this paper designs a fuzzy-PID network congestion control mechanism based on fuzzy-PID controller and meta-heuristic Algorithm.The PID controller can effectively adjust and control the congestion in the wireless sensor network by using the fast convergence ability of the PID controller,and the parameters of the PID controller can be adjusted by means of the Fuzzy Control Algorithm By optimizing its self-adaptive ability to improve its accuracy,and then according to the real-time loss rate calculated by the mold and PID control,using the Cuckoo search to optimize its on-line,further improve the accuracy,the optimal discard probability is obtained.