Research Of Localization Algorithm For Wirelesssensor Networks

With the development of the wireless communication technology, embedded computation technology, WSN (wireless sensor networks) attracts more and more attention. This paper focus on the channel fading model of wireless sensor networks indoors and according to this characteristics, we plan to establish an indoor environment of wireless sensor network nodes deployment of simulation system.Firstly a brief introduction of wireless sensor network nodes positioned itself was given. And some important thoughts and typical research results on the Wireless Sensor Networks node itself positioning were concluded. Some typical wireless sensor network nodes self-localization algorithm and protocol were focus on. However when it was put into practice, it was affected by the surrounding walls and the environment. So there are some obvious errors in these algorithms and protocols when the signal is transmitted by the wireless sensor networks. Therefore we propose the location algorithm received signal strength indication (RSSI), to meet the needs of practical engineering and it can also solve the problems which existing in positioning itself. We also come up with a RSSI node positioning algorithm to solve the uncertainty of wireless sensor network node localization algorithm itself.In order to finding a reasonable balance of the algorithm between the complexity and accuracy, we combine the RSSI and Weighted centroid localization algorithm together and use the RSSI parameters to revise the results that produced by Weighted centroid localization algorithm. So it can reduce the complexity of Distance Location Algorithm, and at the same time it can increase the accuracy of centroid localization algorithm and then It can come to a balance.Compared with the traditional wireless sensor network node's own location model, this algorithm is much better. And it has guiding significance on wireless sensor networks practical engineering.