Research And Design Of Wireless Sensor Network In The Construction Of Border Control System

China is a vast land, the land border line up to 22000 kilometers, with 14 countries bordering. Along the border of the geographical environment is complex, entry and exit channel, pass many, the sidewalk regardless of its, and bear, transport of entry and exit management functions of border station, border police, at present mainly through fixed duty and manual inspections combination of access to the border of border and transportation management, work intensity, poor real-time performance, it is difficult to numerous entry-exit sidewalk, trail implementation effective control has become increasingly prominent.In 2013, the national border defense proposed based on the information construction, relying on information acquisition and integration of modern technology, establish a comprehensive, intelligent control and intelligent border control system. In the video surveillance, radar, AIS, based on the photoelectric tracking system, through the deployment of multi species, the majority of composite micro sensors form a linkage system, to further enrich and improve the current border control and prevention awareness technology, strict border control, to achieve the "pre warning, target tracking, event processing," the prevention and control of work requirements.In the planning and design of border control system, how to obtain specified numerous regional micro sensor information timely return processing, accurate positioning, intelligent early warning system in the whole communication network, especially with the implementation of wireless sensor network communication is a key technology.This thesis aims to analyze the communication technology and performance of the national border control system, and plan to select the micro sensor communication network technology, which is suitable for the national border control system construction, explore and promote the intelligent, intelligent, standardized and automatic remote management.Thesis is divided into four chapters:Chapter Ⅰ, This chapter summarizes the background and current situation of the national border control system construction, The functions and tasks of wireless sensor network in border control system are defined, and the development and current situation of random multiple access technology in wireless communication technology is introduced. On this basis, the paper focuses on the origin of the research content of this thesis, and puts forward the research topic of this thesis.Chapter Ⅱ, Based on the purpose and significance of the construction of the border control system, this chapter discusses the system construction and the design of the system, and discusses the composition and realization method, software platform framework and function of the system construction of the system. At the same time, the analysis of the system of border control system of the various subsystems, the basic have already have a mature technical route, in part of the expansion of the previous works. But in the analysis and design of the border control network transmission system, the remote sensing and communication technology of the network system is specially pointed out. The communication technology of the wireless sensor network communication technology in the border control system is still a new field.Chapter III, This chapter through the analysis of the focus of the national border, characteristics of regional border control task communication requirements, at present mainly short-range wireless communication technology and performance comparison, the selection of a suitable for national border control system of micro sensor network communication technology. The characteristics of wireless sensor network based on ZigBee technology are discussed. The ZigBee technology is used to select the border control and prevention and control of wireless sensor network, Through the implementation of the project implementation, the system is found in the practical application of the problem, the routing protocol and the MAC protocol layer in the face of the problem is analyzed.Chapter IV, In this chapter, we use the method of the average cycle, the non stick CSMA protocol based on the two fork tree type conflict resolution, and the exact mathematical expression of the protocol is obtained by strict mathematical deduction. By simulation, the simulation results are consistent with the theoretical value. Aiming at the problems in the application of wireless sensor networks in border control system, the MAC layer protocol in ZigBee network is analyzed by random multiple access method:Non stick CSMA protocol with monitoring function. By increasing the ACK monitoring signal to improve the controllability of the system, because it takes up more network resources, the throughput of CSMA with monitoring function is smaller than that of the traditional CSMA protocol. After the analysis of the improved model, the two fork tree type conflict resolution algorithm is adopted to reduce the system’s collision rate, and the throughput of the new protocol is improved obviously.