A terminal device comprising telecommunications transceiver circuitry configured to transmit data to and receive data from a communication node in a telecommunications network and controller circuitry configured to control the transceiver circuitry is described. The controller circuitry is configured to: determine the speed of movement of the terminal device; and control the transceiver circuitry to transmit an uplink reference signal that allows the communication node to determine the channel quality between the communication node and the terminal device, wherein the rate of transmission of the uplink reference signal is determined by the speed of movement of the terminal device.