Patent ID: 8331259

Claim:
A method for generating a Channel Quality Indicator (CQI) in a wireless communication system, the method comprising: receiving a Modulation and Coding Scheme (MCS) index and resource allocation information of a traffic channel and calculating a spectral efficiency at a particular time point; determining a temporary CQI index having a spectral efficiency closest to the calculated spectral efficiency in an index set; reading a CQI metric a time τ before the particular time point; if the temporary CQI index is reported at the particular time point, determining an error rate based on the CQI metric, the error rate being a probability of an error occurring in a traffic channel after the time τ; receiving an error check result of the traffic channel transmitted at the particular time point and calculating a new error rate by applying a weight to the error check result and the error rate; and determining a CQI index to be fed back to a transmitter using the new error rate.