Method for grouping together a predetermined number NG of transmitter-receiver pairs for communicating over a communication network, said method comprising: - for each group (Gg) of a determined set (Ω) of groups comprising NG transmitter-receiver pairs: o a step of execution, by the NG pairs of said group (Gg), of an iterative interference alignment technique for a predetermined number I1 of iterations on signals transmitted by said group, said technique comprising the application of a precoding matrix by each transmitter of said group to said signal that it transmits and the application of a processing matrix by each receiver of said group to the signal that it receives, the precoding and processing matrices being updated on each iteration of the iterative interference alignment technique; o a step of sending, by each transmitter (Ek) of the NG pairs of said group of a pilot signal precoded using the precoding matrix resulting from the execution of said iterative interference alignment technique and obtained by the transmitter (Ek) at the end of said I1 iterations, the other transmitters of the group remaining silent when a transmitter of the group sends the precoded pilot signal, and the transmitters of the NG pairs of said group transmitting the pilot signals in succession; o a step of evaluation, by each receiver (Rk) of the NG pairs of said group, of a metric (dIA(k)) representative of a distance between a vector subspace generated by the precoded pilot signal transmitted by the transmitter with which the receiver forms a transmitter-receiver pair, and a vector subspace generated by interferences affecting this pilot signal determined from the precoded pilot signals transmitted by the other transmitters of the group; - a step of computation, by a central processing unit of the network, of a global metric associated with each group of the determined set (Ω) of groups from the metrics (dIA(k)) evaluated by the receivers of the NG pairs of this group; and - a step of selection, by the central processing unit, of a group (GOPT) out of the determined set of groups for communicating over the network optimizing the global metric. - for each group (Gg) of a determined set (Ω) of groups comprising NG transmitter-receiver pairs: o a step of execution, by the NG pairs of said group (Gg), of an iterative interference alignment technique for a predetermined number I1 of iterations on signals transmitted by said group, said technique comprising the application of a precoding matrix by each transmitter of said group to said signal that it transmits and the application of a processing matrix by each receiver of said group to the signal that it receives, the precoding and processing matrices being updated on each iteration of the iterative interference alignment technique; o a step of sending, by each transmitter (Ek) of the NG pairs of said group of a pilot signal precoded using the precoding matrix resulting from the execution of said iterative interference alignment technique and obtained by the transmitter (Ek) at the end of said I1 iterations, the other transmitters of the group remaining silent when a transmitter of the group sends the precoded pilot signal, and the transmitters of the NG pairs of said group transmitting the pilot signals in succession; o a step of evaluation, by each receiver (Rk) of the NG pairs of said group, of a metric (dIA(k)) representative of a distance between a vector subspace generated by the precoded pilot signal transmitted by the transmitter with which the receiver forms a transmitter-receiver pair, and a vector subspace generated by interferences affecting this pilot signal determined from the precoded pilot signals transmitted by the other transmitters of the group; o a step of execution, by the NG pairs of said group (Gg), of an iterative interference alignment technique for a predetermined number I1 of iterations on signals transmitted by said group, said technique comprising the application of a precoding matrix by each transmitter of said group to said signal that it transmits and the application of a processing matrix by each receiver of said group to the signal that it receives, the precoding and processing matrices being updated on each iteration of the iterative interference alignment technique; o a step of sending, by each transmitter (Ek) of the NG pairs of said group of a pilot signal precoded using the precoding matrix resulting from the execution of said iterative interference alignment technique and obtained by the transmitter (Ek) at the end of said I1 iterations, the other transmitters of the group remaining silent when a transmitter of the group sends the precoded pilot signal, and the transmitters of the NG pairs of said group transmitting the pilot signals in succession; o a step of evaluation, by each receiver (Rk) of the NG pairs of said group, of a metric (dIA(k)) representative of a distance between a vector subspace generated by the precoded pilot signal transmitted by the transmitter with which the receiver forms a transmitter-receiver pair, and a vector subspace generated by interferences affecting this pilot signal determined from the precoded pilot signals transmitted by the other transmitters of the group; - a step of computation, by a central processing unit of the network, of a global metric associated with each group of the determined set (Ω) of groups from the metrics (dIA(k)) evaluated by the receivers of the NG pairs of this group; and - a step of selection, by the central processing unit, of a group (GOPT) out of the determined set of groups for communicating over the network optimizing the global metric.