Design And Implementation Of Mobile Positioning System Based On WIFI Signal

With the wisdom of the city’s construction, development becomes faster wireless city, is now WIFI has been covered in many places, such as hotels, restaurants, hotels, movie theaters, supermarkets, etc., WIFI is becoming increasingly important, people’s life can not leave this new Internet users, "Beloved." With the change people’s habits, to any place will first consider whether there is WIFI offer online booking of hotel, guesthouse we will first choose WIFI, potentially we can not do without this network of.Position not unfamiliar to many people, our mobile positioning function, GPS navigation positioning function, but I do not know if you noticed, GPS use is limited, only for the current major roads, buildings and spot some navigation and positioning, but its location inside the building but can not implement functions. But in fact such details of our positioning our needs are great, such as nursing, guard, critically ill patients in the maternity ward tracking prisoners babies so we need regional positioning. Since GPS only for some of the early buildings and facilities, roads and access roads positioning system, its power consumption is also higher locality can not be achieved by the use of GPS positioning. How to use the existing WIFI network to realize the monitored object located within buildings or structures is the current hot spot of our concerns. By now the regional WIFI can improve the positioning accuracy of monitored objects can be tracked on the related object, the object can be achieved for some monitoring of targeted relief, the significance for the development of society as a whole is significant.Based on this research topic WIFI mobile phone positioning system includes three subsystems:the mobile client software, AP access point and server-side software three parts. By early signal acquisition for a particular region, division and address labels feature points, the system can aid the nearest neighbor matching algorithm or trilateral monitoring object positioning method to calculate and process monitoring in order to achieve the object positioning. System integration of three subsystems will eventually form a whole, calling the Geocoder Google Map API provided by the mobile client to address code to achieve the analytic function information, the system also uses a number of data encryption technology to ensure the operation of the system security. Finally, system testing, the system runs better relatively stable and reliable.