A method for transmitting data on a communication network, the communication network including a plurality of network nodes connected to one same medium for sending and receiving data signals. The data are transmitted by nodes on the medium during transmission cycles, and each transmission cycle includes a plurality of transmission opportunities each of which is allocated to a respective node based on a node identifier associated with that node. The method provides that at least one node listens to the medium for signals transmitted during a transmission cycle and detects the node identifiers associated with the nodes that used a respective transmission opportunity to transmit at least a signal. Accordingly, the node creates a list of the node identifiers detected, wherein the node identifiers are listed according to the order of the transmission opportunities in the transmission cycle.