Improvement on APIT Localization Algorithms for Wireless Sensor Networks

Wireless Sensor Networks (WSN) can be used in many application fields. The localization of sensor nodes, which is the foundation of the other applications, is to determine self-position using a certain localization scheme, according to the anchor nodes. In this paper, a thorough analysis for approximate point-in-triangulation test (APIT) algorithm is made, and an improvement of it is proposed. The analysis shows: compared with the original one, the improvement algorithm reduces the probabilities of In-To-Out Error and Out-To-In Error from the original one and the more perfectly theory has been appeared.