A method of signaling is disclosed. A terminal receives downlink control signaling from a base station and sends an uplink packet to the base station. The uplink packet is sent according to the received downlink control signaling. The downlink control signaling includes a field that includes N bits. The field itself is dynamically indicative of one of a payload size or a redundancy version such that the field itself is indicative of the payload size if a packet that the terminal will send to a base station is an initial transmission and the field itself is indicative of the redundancy version if the packet that the terminal will send to the base station is a retransmission.