Embodiments herein relate to e.g. a method performed by a first communication device for controlling transmission of one or more data packets in a wireless communication network. The first communication device transmits an indication, to a second communication device, indicating one or more of the following: a maximum number of duplicates allowed to be transmitted for each data packet; type of duplication; a data radio bearer, DRB, for which duplication is configured; a radio link control, RLC, entity that is allowed to transmit a duplicate; an order of RLC entities in which the second communication device should transmit a first data packet and following duplicates; whether duplication is activated or deactivated for a DRB.