A method of transmitting measurement reports by a wireless communications device to an infrastructure equipment, the method comprising: receiving (310, 312, 314) signals transmitted by the infrastructure equipment, measuring a characteristic associated with the received signals, selecting an index value from one of a plurality of index values, the plurality of index values being channel quality indication, CQI, index values, each of the index values representing a range of values of the characteristic for which communications parameters of a transmitter in the infrastructure equipment and a receiver in the communication device should have to achieve an acceptable communications performance for a value of the characteristic within the range of values of the characteristic, the selected index value representing the communications parameters of the transmitter and the receiver which will satisfy the acceptable communications performance over a range of values of the characteristic including the measured value of the characteristic, and subject to the selected index value, transmitting the selected index value to the infrastructure equipment, wherein a separation between the range of values of the characteristic for communications parameters achieving the acceptable communications performance corresponding to at least two of the plurality of indexes representing higher values of the characteristic is greater than a separation between the range of values of the characteristic for communications parameters achieving the acceptable communications performance corresponding to two others of the plurality of indexes representing lower values of the characteristic, wherein the acceptable communications performance corresponds to a block error rate of no higher than 10%, and wherein the characteristic is a signal to noise ratio or a signal to interference and noise ratio. receiving (310, 312, 314) signals transmitted by the infrastructure equipment, measuring a characteristic associated with the received signals, selecting an index value from one of a plurality of index values, the plurality of index values being channel quality indication, CQI, index values, each of the index values representing a range of values of the characteristic for which communications parameters of a transmitter in the infrastructure equipment and a receiver in the communication device should have to achieve an acceptable communications performance for a value of the characteristic within the range of values of the characteristic, the selected index value representing the communications parameters of the transmitter and the receiver which will satisfy the acceptable communications performance over a range of values of the characteristic including the measured value of the characteristic, and subject to the selected index value, transmitting the selected index value to the infrastructure equipment, wherein a separation between the range of values of the characteristic for communications parameters achieving the acceptable communications performance corresponding to at least two of the plurality of indexes representing higher values of the characteristic is greater than a separation between the range of values of the characteristic for communications parameters achieving the acceptable communications performance corresponding to two others of the plurality of indexes representing lower values of the characteristic, wherein the acceptable communications performance corresponds to a block error rate of no higher than 10%, and wherein the characteristic is a signal to noise ratio or a signal to interference and noise ratio.