Abstract: In a radiocommunication system, the data exchanged are protected against transmission errors according to a protection scheme selected by taking account of an indication according to which a transition from a protection scheme is authorized or forbidden. For at least one base station of said system: for the mobile stations having respective radio links with said base station, measurements are taken of the parameters relative to conditions of propagation on said radio links and between said mobile stations and at least one base station adjacent to said base station; the indication relative to the transitions for the radio links with the base station is updated so that at least one transition is considered to be authorized if a criterion, a function of the measured parameters, is satisfied, and forbidden if said criterion is not satisfied.