Research And Implementation Of Scheduling Strategy Of Wireless Positioning System

In our life,the application of wireless positioning technology are very rich.According to the general application area,wireless positioning technology can be divided into global positioning system and wireless sensor network positioning system.Compared with wireless sensor network positioning system,the advantages of global positioning system are wide-range,long distance,and can cover most of the world.It has important influence on the development of military and navigation.However,this method has the disadvantages in indoor environment and high power consumption of receiver.In the fields of agriculture,industry,construction and the Internet of Things,there are more and more demands for the location of modules in wireless sensor networks,and higher and higher performance requirements for wireless positioning systems.At present,in the research of wireless positioning in wireless sensor networks,most of the research focuses on the accuracy of positioning system.The accuracy of wireless positioning system is an important index to access of wireless positioning system,but the efficiency,economy and robustness are also important indexes to evaluate the mature application of wireless positioning system.The main research object of this topic is the wireless positioning system in the wireless sensor network.The specific research direction is the efficiency and stability of the positioning system,and the goal is to design an efficient and robust large-area wireless positioning scheme.In this paper,a kind of wireless positioning system is designed according to the Trilateration Localization.In order to make the system more fit for engineering application in actual production and life,this research mainly does two aspects of work: First of all,in order to make the system more efficient and stable,the collaborative wireless ranging mode of Received Signal Strength(RSS)model and Round-trip Time Of Flight(RTOF)method is selected,and Lo Ra communication technology is selected to realize the collaborative ranging mode of Round-trip Time Of Flight and Received Signal Strength model by using SX1280.Through channel scheduling strategy and ranging optimization,a new wireless ranging model is established,and then through the experiment to test the influencing factors of wireless ranging under the process of ranging way,ranging parameters.And verify the beneficial effect of the wireless ranging model.Secondly,to realize efficient wireless positioning process,a ranging communication scheduling strategy of wireless positioning system and a time synchronization strategy between information transmission and base station are designed.According to the queuing theory and the actual functional requirements and technical limitations of wireless positioning system,and considering the non-Markov process characteristics of the ranging and communication scheduling strategy of wireless positioning system designed in this paper,a queuing theory model matching wireless positioning scheduling strategy of serial parallel hybrid service institutions is designed.With the help of MATLAB,the model operation process is simulated to verify the scheduling strategy designed in this paper to improve the efficiency and robustness of the wireless positioning system.Finally,through the design of embedded software and hardware combined with the Lo Ra wireless communication module(SX1280),the experimental platform and wireless positioning system prototype are built.In addition,relevant experiments are carried out to prove the feasibility and beneficial effects of the strategies.