Research On Indoor Wi - Fi Positioning Based On RSSI

Over the past decade has been the rapid development of the Internet, both in theworld or within our range, the network has become an indispensable part of ourlives.Now, the network is no longer a simple information access and transfer ofmedia, it has become the main carrier for the services of our lives.As an importantpart of the network, a wireless network with its simple, convenient and availabilityadvantages to attract more and more people’s attention.Especially in recent years, thepopularity of smart phones has brought new opportunities for the development ofwireless networks,and the mobile phone customers demand was increasing forapplications. The spawned services from Wireless network also provides greatconvenience for our lives.Wireless location technology as a new type of technologyindustries of wireless network technology spawned, has been widely used in thecurrent aspects of our lives,The technology use the network by ad hoc networkaccess point and the mobile terminal to establish as the carrier,use the algorithm asthe core, able to obtain accurate location information of a mobile terminal to meetthe needs of different users.Now, this technology has been applied to health care,logistics, social services, military and other fields, and the results highlight.Similarly,since the beginning of the21st century,China’s had rapid economicaand urbanization development,People’s activitiesfocus gradually shifted fromoutdoor to indoor,A substantial increase in demand for indoor positioning,how toachieve precise positioning indoors and become an important direction of the currentinquiry.This provides an opportunity for the Wi-Fi technology to locate,Wi-Fitechnology in indoor applications have obvious advantages, it is simple to install,fast network, and most intelligent terminals with wireless Wi-Fi capabilitiescurrently.At the same time, it also faces enormous challenges, Wi-Fi positioningbiggest problem is likely to influence and interference by environmental factors.Sohow on the basis of cost optimization, improve positioning accuracy, become animportant direction Wi-Fi positioning technology research,this paper proposes afusion algorithm based on the received signal strength (RSSI) and establish selectionmechanism, introducing a threshold E, selection algorithm convergence direction byE.The experimental results show that this method can better take into account boththe advantages of physical decay of model algorithm and location fingerprint algorithm, balanced positioning accuracy and efficiency.On the other hand, in the era of big data, disclosure of location information, hasseriously affected the user experience.Users in the use of location services, may havebecome some of the attacker’s target,An attacker can take advantage of multiplelocation data obtained by data mining technology, get the user’s private informationeasyly, such as home address, workplace, health status and so on.Currentinformation disclosure issue has become a major factors that hinder the developmentof location-based services,many criminals have a chance to have a serious threat tothe life safety of users. In this paper, several common privacy protection algorithmsto do the research,and on this basis propose an improved K-anonymity privacyalgorithm,the algorithm can effectively avoid the attack model for data on thelocation information of the attack, and reduce the risk of loss of privacy.