Asynchronous Two-level Priority Polling Controlled Intelligent Sentry System Based On FPGA

The trend of war informatization has been irreversible.As an important support of war informatization,Countries all over the world have carried out in-depth research.Among them,and NATO,led by the United States,has invested a lot of money in the research.The hot issues of research mainly focus on the access control protocol,which represents the channel allocation,so a good access control protocol can greatly improve the performance of tactical data link.In the research of access control protocol,the research of access control protocol based on polling mechanism has been widely concerned.Starting from the characteristics and advantages of basic polling access control protocol,this paper studies and designs from the following aspects（1）Markov chain and probability generating function are used to analyze and study the basic polling models,such as complete polling model,threshold polling model and limited polling model.MATLAB is used to compare the advantages and disadvantages of these three basic polling models in terms of average queue length and average waiting time.（2）An asynchronous two-level priority complete service polling model is proposed,and the exact mathematical expressions of average queue length and average waiting time are derived.The software platform MATLAB is used for numerical calculation and simulation verification.Different arrival rate,information packet service time and conversion time are set in MATLAB.The control variable method is used to verify whether the model can distinguish priorities under different conditions,and whether the average queue length and average queuing service time of high priority queue always keep a low value.（3）The asynchronous two-level priority full service polling model is designed based on field programmable logic array（FPGA）,and the hardware circuit is constructed.Then the simulation is carried out on quartus software platform,and the average queue length and average queuing service time are counted,and compared with the theoretical value,and the implementation of the polling model on FPGA is studied.（4）According to the application requirements of smart sentry system in tactical data link,for military wired networks,the asynchronous two-level priority full service polling model control system based on FPGA is integrated with infrared detection module,dial-up module,wired telephone and wired telephone network to realize the smart sentry system,so as to meet the deployment requirements of some special application places,such as deep mountains,old forests,border post and other areas without network coverage According to the analysis of the experimental results,the asynchronous two-level priority full service polling control system based on FPGA can distinguish the priority of information and improve the efficiency of the system.The test results show that we have realized the integral function of the smart sentry system,and due to the use of infrared detection,it can adapt to the security needs of different environments and the asynchronous two-level priority full service polling control system designed in this paper can orderly control the query,reading and processing of intrusion information,and make the important intrusion information be processed in time Information can be effectively processed to reduce the waiting time of information and improve the real-time performance of information processing.