In the context of a dynamic adaptation of a transmission data rate of a terminal device in a wireless communication network, predefined transmission profiles that correspond to respective data rates are associated respectively with reception sensitivities. A server performs an optimization of said transmission data rate in successive stages, and decides to switch to a new stage according to a frame delivery rate with respect to a predefined threshold. The server selects the transmission profile to be applied by the terminal device while keeping at least a predefined margin, dependent on the stage at which the operation is performed, between received signal strength indication and reception sensitivity corresponding to said transmission profile.