The disclosure relates to a communication terminal and a method for controlling a data transmission. The communication terminal is described comprising a quality determiner configured to determine a quality parameter for a wireless communication link between the communication terminal and a radio access network component based on one or more signals received via the wireless communication link, a throughput determiner configured to determine, based on the quality parameter, a throughput of a communication connection between the radio access network component and a server to be used for transmitting data from the server to the communication terminal via the communication connection and the wireless communication link, and a controller configured to send an instruction for the server to transmit data via the communication connection between the radio access network component and the server according to the determined throughput.