The method involves calculating a new value of a stream for a part of mobile terminals (T) of a cell, for each new mobile terminal entering in one of cells (C1- C3). The calculated stream is allocated to the terminals based on preset stream allocation strategies. The entering terminal is rejected, if the stream requested by the terminal is less than or equal to minimum stream required for obtaining a service requested by a terminal. Independent claims are also included for the following: (A) an equipment for allocation of data stream for mobile telecommunication terminals of a cell of a telecommunication cellular network (B) a software module stored on a medium and comprising instruction codes for the execution of a data stream allocation method.