Accuracy Estimation of Location Determination Based on Database Correlation

In general, every location method is afflicted with a specific error given by the distance between estimated and actual position. The Database Correlation is a network based positioning method enabling to determine the location of a mobile phone with a good accuracy. Due to the complexity of this method, its error cannot be traced to network parameters, directly. Motivated by the deviation of localisation accuracy along adjacent routes, the sources of position errors are identified in this paper. Based upon, the novel concept of Individuality describing the relation between the database and the obtained error is derived. The appliance of this concept to a GSM System shows that location error is smaller in case the Individuality of the database is high.