A method for reporting channel quality information in a wireless telecommunication network, wherein the network includes a radio base station in wireless communication with a plurality of user equipments by user transmission channels, and wherein the method includes the radio base station: detecting a coherence bandwidth associated to a total transmission channel, the total transmission channel including the user transmission channels of the plurality of user equipments; selecting one reporting technique for reporting channel quality information among a plurality of available reporting techniques, the selection being based on the coherence bandwidth; and transmitting a first message to each of the plurality of user equipments, the message reporting an indication of the selected reporting technique. A radio base station, a public mobile network and a user equipment suitable to implement the method are also disclosed.