Method of broadcasting over-the-air multicast

(57) How to broadcast data to multicasting through an air interface in a summary radio telecommunication network to the group of a mobile communications terminal. The statistical data of a cell is collected from general point-to-point cellular transmission, in order to build the database for each base station. Statistical data shows the optimal signal quality that a user usually experiences, when operating in a cell. The minimum transmission quality (TQmin) in the case of receiving the data type by which a mobile communications terminal is broadcast based on this data (12) is determined. This method broadcasts test transmission (33) to a moving terminal, and in order to restrict the number of responses, it includes the highest transmission quality (TQmax). A response (36) is received from the moving terminal representing a group. The response concerned includes the display of the received transmission quality. This method determines whether the received transmission quality is more than TQmin (12) (37). When the received transmission quality is more than TQmin, data is broadcast by multicasting through an air interface to the group of a mobile communications terminal.