One embodiment of the present disclosure relates to a method for operating in a terminal device for downlink flow control. The terminal device receives duplicated packets from a first network node device and one or more secondary network node devices. The method comprises measuring downlink transmission information for the first network node device and the one or more secondary network node devices; deciding downlink flow control information based on the measured downlink transmission information; and sending the downlink flow control information to at least the first network node device. According to other aspects of the present disclosure, there are provided corresponding methods and devices.