Process and devices for selective collision detection

The present invention concerns a method in a network (3) comprising at least a first device (1) and a second device (2), where the sending of a packet by two devices simultaneously generates a collision. The method comprises the steps of emitting by the first device a packet comprising a first part, and a second part comprising at least an identification of a source and a destination of the packet, receiving the first part of the packet by the second device; and in the case of the second device detecting a collision during the reception of the second part of the packet, issuing a packet indicating collision detection by the second device. The present invention also concerns a sending device and a receiving device implementing the method.