Wireless Sensor Network Localization Algorithm With Simple Event

As an emerging technology, wireless sensor network (WSN) has limitless application prospect. You only need to deploy numerous tiny sensor nodes to the target area, they will help you gather a variety of information, such as temperature, humidity, etc., then they will filter and organize these information, and ultimately gather together all information to the base station through the entire network, users could use these information by terminal.Currently, wireless sensor networks have been widely used, more common of them are environmental monitoring and forecasting, transportation, fire alarms, infrastructure protection, agriculture, health care, industrial sensing and military monitoring. With the development and progress of science and technology, WSN will make more contributions to the development of society.Since WSN is mainly used to monitor various environmental characteristics of the target area, in many cases, sensor nodes collected information should be associated with its own location, and monitor information without location is generally meaningless. Therefore,sensor node localization affects the development and application of WSN.LUE (Sensor Node Localization with Uncontrolled Events) locates nodes with external event, which could effectively reduce the number of anchors during localization. But no matter use linear scan event or annular diffusion event, there is always event redundancy in the same anchors distribution, which makes localization inefficient. In order to solve the problem of event redundancy, this article introduces the ideas of mobile anchors to LUE.On the basis of LLSE (Sensor Node Localization with Linear Scan Events), the third chapter of this article proposed LLSEMA (Sensor Node Localization with Linear Scan Events and Mobile Anchors), which uses mobile anchors and strategy of most efficient event selection to reduce redundant events, simulation results show that compared with LLSE, LLSEMA has better efficiency and accuracy. And in the basis of LADE, the fourth chapter of this article proposed LADEMA (sensor node localization with annular diffusion events and mobile anchors), which uses mobile anchors and strategy of anchors adjustment to reduce redundant events, simulation results show that compared with LADE, the efficiency and accuracy of LADEMA are improved.