Patent ID: 7688798

Claim:
A method for transmitting data via a radio channel of a communication network between a transmitter and a receiver, the method comprising: determining at least one transmission parameter of the data transmitted to the receiver; determining a first channel quality, known to the transmitter, at the receiver, wherein the first channel quality is based at least in part on the at least one transmission parameter; determining a second channel quality from the first channel quality; comparing the first and second channel qualities in the receiver, wherein, if the first and second channel qualities differ from each other by more than a predefined tolerance value, the receiver informs the transmitter of a deviation by means of a channel test message, wherein the channel test message is sent in addition to further, regularly provided test messages; sending additional channel test messages in a time interval which is narrower than the time interval in which the regular channel test messages are sent; determining a further channel quality; and adjusting the at least one transmission parameter based on the further channel quality.