A method of operating a terminal device (101) includes configuring a data connection (189) on a wireless link (114) between the terminal device (101) and a network (100) based on a first control signal (4001-4003) native to a first layer (255) of a transmission protocol stack (250) associated with the wireless link (114). The method also includes participating in a data communication via the data connection (189). The method also includes receiving a second control signal (205) native to a second layer (251) of the transmission protocol stack (250), the second layer (251) being arranged lower in hierarchy of the transmission protocol stack (250) than the first layer (255). The method also includes in response to receiving the second control signal (205): activating a discontinuous reception (390) for the data communication.