A method of operating a user equipment (103, 203) in a mobile communication system, the method comprising: generating a measure of reliability of a predicted channel estimate and of impairment stability by the user equipment (103, 203), wherein the predicted channel estimate is a predicted estimate of a channel between the user equipment (103, 203) and a node (101, 201) of the mobile communications system, and wherein impairment refers to any source of signal distortion; and controlling (305, 307, 309) transmission of a channel quality report to the node (101, 201) of the mobile communication system as a function of the generated measure of reliability of the predicted channel estimate and of impairment stability, wherein controlling the transmission of the channel quality report to the node (101, 201) of the mobile communication system as a function of the generated measure of reliability of the predicted channel estimate and of impairment stability comprises: inhibiting transmission of the channel quality report to the node (101, 201) of the mobile communication system for a duration of time corresponding to the measure of reliability of the predicted channel estimate and of impairment stability, and wherein the method further comprises: prior to inhibiting transmission of the channel quality report to the node (101, 201) of the mobile communication system for the duration of time corresponding to the measure of reliability of the predicted channel estimate and of impairment stability, transmitting to the node (101, 201) of the mobile communication system an indicator that transmission of the channel quality report will be inhibited. generating a measure of reliability of a predicted channel estimate and of impairment stability by the user equipment (103, 203), wherein the predicted channel estimate is a predicted estimate of a channel between the user equipment (103, 203) and a node (101, 201) of the mobile communications system, and wherein impairment refers to any source of signal distortion; and controlling (305, 307, 309) transmission of a channel quality report to the node (101, 201) of the mobile communication system as a function of the generated measure of reliability of the predicted channel estimate and of impairment stability, wherein controlling the transmission of the channel quality report to the node (101, 201) of the mobile communication system as a function of the generated measure of reliability of the predicted channel estimate and of impairment stability comprises: inhibiting transmission of the channel quality report to the node (101, 201) of the mobile communication system for a duration of time corresponding to the measure of reliability of the predicted channel estimate and of impairment stability, and inhibiting transmission of the channel quality report to the node (101, 201) of the mobile communication system for a duration of time corresponding to the measure of reliability of the predicted channel estimate and of impairment stability, and wherein the method further comprises: prior to inhibiting transmission of the channel quality report to the node (101, 201) of the mobile communication system for the duration of time corresponding to the measure of reliability of the predicted channel estimate and of impairment stability, transmitting to the node (101, 201) of the mobile communication system an indicator that transmission of the channel quality report will be inhibited. prior to inhibiting transmission of the channel quality report to the node (101, 201) of the mobile communication system for the duration of time corresponding to the measure of reliability of the predicted channel estimate and of impairment stability, transmitting to the node (101, 201) of the mobile communication system an indicator that transmission of the channel quality report will be inhibited.