Localization Algorithm Research In Wireless Sensor Networks With Mobile Node

In recent years, with the progress of radio and microelectronics technology, miniature sensor industry has also developed rapidly. Meanwhile, the research about wireless sensor network (WSN) attracts extensive attention. The WSN can be arranged in a broad area and be used to monitor the environmental parameter, for example, pressure, temperature, humidity and so on. But if we don't know the position corresponding to these parameters, it will be meaningless to obtain these parameters. So node positioning technology itself becomes one of the keying technologies of wireless sensor network.Localization is very important for wireless sensor networks. Since the surveillance area is usually a dangerous area or a hostile area, node location is usually random and unknown. Sensor node must clear their own position in order to provide the incident occurred sites, and target tracking, real-time monitoring and forecast goal line, realizing such external locus of localization and tracking targets.On the other hand, sensor node location information can also assist routing and improve the efficiency of routing and so on. Therefore, node location is rather important.This master research localization algorithm based on mobile node for wireless sensor networks. Mobile node can provide virtual anchor coordinates, which is not only decrease the number of static anchors, but also increase localization accuracy. This master proposes two localization algorithms. One is a Localization Algorithm for Wireless Sensor Networks based on Improved Random Waypoint Mobility Model; the other is a Mobile Anchor Localization Algorithm based on Hilbert Space Filling Curve. This master describes these algorithms in detail in corresponding sections.