A method for data processing, in an ad hoc radio communication network including a set of radio communication stations (Si, i = 1 to 6) each forming a node (Ni, i = 1 to 6) of the ad hoc network, the said method including the following steps in order to create a group comprising of a subset of the said stations: i/ creating by a first station (S1) of a first message indicating the network address of the group and the network addresses of the stations in the group ; ii/ transmitting from the said first station and to all of the stations in the ad hoc network, the said first message ; iii/ implementing, by each station of all stations in the ad hoc network, the following steps upon receipt of the said first message by the said station : - recording by the said station, in a lookup correlation - mapping table, of the network address of the group and performing a mapping between the said network address of the group indicated in the first message and the network addresses of the stations in the group indicated in the first message ; - determining whether the network address of the said station is present among the network addresses of the stations in the group indicated by the first message ; and - if the network address of the said station is determined to be present, recording, by the said station, of the network address of the group indicated in the first message as the group address of the said station. i/ creating by a first station (S1) of a first message indicating the network address of the group and the network addresses of the stations in the group ; ii/ transmitting from the said first station and to all of the stations in the ad hoc network, the said first message ; iii/ implementing, by each station of all stations in the ad hoc network, the following steps upon receipt of the said first message by the said station : - recording by the said station, in a lookup correlation - mapping table, of the network address of the group and performing a mapping between the said network address of the group indicated in the first message and the network addresses of the stations in the group indicated in the first message ; - determining whether the network address of the said station is present among the network addresses of the stations in the group indicated by the first message ; and - if the network address of the said station is determined to be present, recording, by the said station, of the network address of the group indicated in the first message as the group address of the said station. - recording by the said station, in a lookup correlation - mapping table, of the network address of the group and performing a mapping between the said network address of the group indicated in the first message and the network addresses of the stations in the group indicated in the first message ; - determining whether the network address of the said station is present among the network addresses of the stations in the group indicated by the first message ; and - if the network address of the said station is determined to be present, recording, by the said station, of the network address of the group indicated in the first message as the group address of the said station. <EOS>