Method for channel change in digital radiocommunication system

Method for the change of a radio bearer in a digital telecommunication system comprising a radiomobile unit (PP) and a fixed unit (RFP) connected between them on at least a bearer in the following, labeled with X. When a radio unit (PP or RFP) detects a bad connection quality on bearer X between said radiomobile unit (PP) and fixed unit (RFP), the method applies with the execution in sequence of the following steps:a) listening of a new frequency on at least one of the time slots used in reception with the purpose to identify a second not interfered bearer, in the following, labelled with Y;b) sending from the requiring radio unit to the interacting radio unit a message requiring the activation of the said second bearer (Y);c) transferring of all communications between both radio units from the first bearer X to the second bearer Y as soon as the requiring radio unit receives a specific confirmation message by the interactive radio unit;d) return to the listening step if the confirmation message is not received. The invention has the advantage of enabling the handover of a radio bearer changing only the frequency, but maintaining the same transceiving time slots without the need of an additional time slot which, in this way, is available for new communications.