A power allocation method for a wireless telecommunication system comprising at least a first couple of terminals consisting of a first transmitting terminal and a first receiving terminal and a second couple of terminals consisting of a second transmitting terminal and a second receiving terminal, a first communication between the terminals of the first couple using the same transmission resources as a second communication between the terminals of the second couple, so that both communications mutually interfere, wherein the first communication must meet a first set flow rate ( ρ 1) and the second communication must meet a second set flow rate ( ρ 2) characterised in that a control node: - determines, from an estimation of channel coefficients between the transmitting and receiving terminals, and for a transmission power range of the transmitting terminal, and a second transmission power range of the second transmitting terminal, a partition of an interference diagram of the first and second communications, into different areas, said interference diagram providing the signal to noise ratio at the first receiving terminal as a function of the signal to noise ratio at the second receiving terminal, each area of said diagram corresponding to a distinct type of processing of the interference by said first and second receiving terminals; - calculates, for each communication, the minimum transmission power curve enabling to perform interference processing in each said area, in view of the first and second set flow rates; - determines (720, 730), if any, the point of intersection of said minimum transmission power curves relating to the first and second communications; - deduces from the coordinates of this point of intersection in the interference diagram, a first and a second transmission power values P 1 *, P 2 * to be allocated to the first and second transmitting terminals, respectively; - transmits the first and second power values to the first and second transmitting terminals, respectively. - determines, from an estimation of channel coefficients between the transmitting and receiving terminals, and for a transmission power range of the transmitting terminal, and a second transmission power range of the second transmitting terminal, a partition of an interference diagram of the first and second communications, into different areas, said interference diagram providing the signal to noise ratio at the first receiving terminal as a function of the signal to noise ratio at the second receiving terminal, each area of said diagram corresponding to a distinct type of processing of the interference by said first and second receiving terminals; - calculates, for each communication, the minimum transmission power curve enabling to perform interference processing in each said area, in view of the first and second set flow rates; - determines (720, 730), if any, the point of intersection of said minimum transmission power curves relating to the first and second communications; - deduces from the coordinates of this point of intersection in the interference diagram, a first and a second transmission power values P 1 *, P 2 * to be allocated to the first and second transmitting terminals, respectively; - transmits the first and second power values to the first and second transmitting terminals, respectively.