Protocol And Performance Analysis Of Energy And Information Transmission Between Nodes In WSN

Wireless Sensor Network(WSN)is composed of sensors distributed in a certain range,and sensors are the points for sensing the external environment.Data transmission between sensors is performed by wireless communication in wireless sensor networks,which have been widely used in military,aviation,disaster relief,environment,medical and other fields.At present,the researches of wireless sensor networks have great challenges.In order to optimize the performance of wireless sensor networks and achieve efficient and continuous communication,this paper proposes an energy-assisted protocol for energy and information transmission between sensors to improve system performance.Since wireless sensor networks rely on battery power,the limited storage capacity of the battery results in a limited lifetime.At the same time,frequent replacement of the system's power supply battery will affect its normal working procedures.Therefore,it is necessary and inevitable to adopt energy harvesting methods in wireless sensor networks.However,the large volume of the energy harvesting device brings a lot of inconvenience to the carrying and integration process of the wireless sensor networks.In addition,the collection of energy sources such as solar energy and wind energy is greatly affected by the natural environment,and its development has been hindered.Thus,in view of the complex structure of the wireless sensor network and limited life cycle,it is necessary to find a suitable energy collection method.Therefore,the researches of energy and information transmission protocols based on energy harvesting in wireless sensor networks are of great significance.The sensors of WSN can collect the information in the environment to be monitored or on the surface of the object.The network may be in a static or dynamic state,and when we take into account the security and durability of the network,the requirements for the volume,power consumption and transmit power of sensors have become more stringent.In order to achieve efficient and accurate transmission of information under strict constraints,the relay is adopted to assist other nodes to complete communication.In recent years,domestic and foreign scholars have proposed many protocols for relay cooperative transmission,but they all regard direct link as an open circuit.They have certain limitations.Therefore,direct link and relay cooperative transmission are coexisted,and reasonable research is made.The transmission protocol for wireless sensor networks is used to improve the performance of system transmission and has sufficient research value.In this paper,the improvement of system performance is the optimization goal.Considering the existence of direct link and relay cooperative transmission at the same time,the model of simultaneous information and energy transmission in wireless sensor networks is established.An energy and information transmission protocol between nodes in wireless sensor networks is proposed.The transmission protocol extend the lifetime of the system,lays the foundation for the future research of wireless sensor networks based on energy harvesting.The research ideas of this paper are as follows:Firstly,according to the distribution structure characteristics of wireless sensor networks,the sensor system distribution model in wireless sensor networks is established.Secondly,combined with energy harvesting technology,the transmission model of signals between nodes is determined.Thirdly,based on the model of simultaneous information and energy transmission,a transmission protocol exists in which direct link and relay cooperative transmission exist simultaneously.Finally,the system performance is simulated and optimized according to the proposed protocol.The main work of this paper is as follows:1.The study of distribution structure and application environment of wireless sensor networks,and integrate energy harvesting technology into wireless sensor networks to establish a reasonable sensor system model.2.Considering that the nodes in the wireless sensor network are in a special location,the energy sources used by each node are not identical,and the amount and time of energy harvesting are random.Therefore,the energy harvesting technology is selected to meet the energy needs of the nodes.The corresponding signal transmission model is determined according to the energy harvesting technology selected.3.Aiming at the energy efficiency,accuracy and working time of the wireless sensor network,the transmission model of simultaneous information and energy transmission is adopted.Protocols combining direct link and relay cooperative transmission are proposed.The protocols not only have the directness of direct transmission also have the accuracy and stability of collaborative transmission.4.According to the above proposed transmission protocol,the system performance is simulated by MATLAB software programming,and the curve of system performance with important parameters is obtained.The simulation results show that the proposed protocol optimizes the performance and the throughput is improved.The above research provides a new method to solve the problem of high energy efficiency and durability of wireless sensor networks.The transmission protocols proposed have been proved to improve the system throughput and reduce the system outage probability,which provides a reference for the research of subsequent wireless sensor network related issues.