A method comprises listening (151) for transmission of a preamble by a transmitting device to a recipient and receiving (153) data in a second time interval upon receiving the preamble in a first time interval. The second time interval succeeds the first time interval. The method further comprises listening (155) for transmission by the recipient of a message, e.g. a NACK, indicating that data transmitted in the second time interval was not successfully received by the recipient and retransmitting (157) the data in a fourth time interval upon receiving the message in a third time interval.