According to an aspect of this disclosure a communication terminal device is provided, comprising: a transceiver configured to communicate with a communication device according to a retransmission protocol; a controller configured, for a message transmitted from the communication device to the communication terminal device, to at least one of decide, upon a successful receipt of the message from the communication device, if the controller controls the transceiver not to transmit an acknowledgement message which is to be transmitted according to the retransmission protocol; and decide, upon an unsuccessful receipt of the message from the communication device, if the controller controls the transceiver not to transmit a negative acknowledgement message which is to be transmitted according to the retransmission protocol.