The study of the methods to increase the security of the public places using coverage improvement and their monitoring based on wireless sensor networks

The use of Wireless Sensors Networks (WSNs) is rapidly growing in the areas of research, application, operation, and commerce. These kind of networks are used for monitoring a desired region of an environment. So, many abilities of these networks, by considering their lower cost, have caused them to be applicable in various areas. WSNs are designed in scale of hundreds to thousands nodes, wherein this great scale is technologically the most challenging issue. One of the most basic and challenging problem is the coverage issue. Security is another important issue. Coverage is the most paramount goal of creating and implementing of WSNs, because coverage is directly related to the degree of quality, method, and durability of the WSNs for recognizing the parameters and defined aims of the regions, and the implementation cost. In this paper, the methods of improving the security of public places (by increasing the coverage of the regions based on the sensors networks) have been investigated. The results indicate that by choosing an appropriate and optimum coverage, it is possible not only to cover the entire region by utilizing the minimum number of sensors, but also it is possible to increase the security of the monitored places of the network by lesser nodes.