Location of a mobile terminal

摘要

The objective of the invention is the positioning of a mobile terminal in a cellular-based radio communication network. A set of prediction parameters, representing the electro-magnetic field of a cell, is determined in the network design system automatically for each cell in the network, in specified intervals. A model of the radio coverage area of the cell is generated by attaching to each prediction parameter the corresponding location data in the radio coverage area. The probability value of the location of the terminal is calculated in relation to the location data of each prediction parameter, by applying a special penalty function to the measurement parameter determined by the terminal and to the prediction parameter of the model of the radio coverage area. As a result a set of probability values representing the location of the terminal are obtained which are projected by means of a special combination function into one plane and narrowed into a single data specifying the location of the terminal. <IMAGE>