PROCÉDÉ ET SYSTÈME POUR LA TRANSMISSION DE DONNÉES SUR UNE LIGNE DE MOYEN TENSION OU HAUTE TENSION

摘要

The present invention is a method for data transmission over a high or medium voltage line, in which primary frequency channels (A1) are used for data transmission between a first data transmission device (TRA1) and a second data transmission device (TRB1) and a frequency channel assignment information (SMB1) is transmitted on a secondary frequency channel (MB1), characterized in that a third data transmission device (TRA2) receives the frequency channel allocation information (SMB1) on the secondary frequency channel, and detects an occupancy of a primary frequency channel (A1) used by the first and the second data transmission device, and releases this frequency channel (A1) for its own use when the signal strength of the occupancy information (SMB1) received from the third data transmission device falls below a first predetermined threshold value.