Method and apparatus for determining reporting period of channel quality information in multi-carrier wireless system

An apparatus for determining a feedback period of channel quality indicator in a mobile station for a wireless communication system, comprising:

• a memory for storing a fairness determination variable and a threshold value;
• a channel gain estimation unit for estimating a channel gain from a signal transmitted from a base station;
• a weight channel quality estimation unit for calculating a weight value by using the stored fairness determination variable and the estimated channel gain, and estimating weighted channel quality to the estimated channel gain based on the calculated weight value;
• and
• a comparison unit for comparing the estimated weighted channel quality to the stored threshold value and determining feedback of estimated channel quality indicator when the weighted channel quality is higher than the threshold value.

A method for determining a feedback period for providing channel quality indicator in a mobile station for a wireless communication system, comprising the steps of:

• a) estimating a channel gain based on a signal received from a base station;
• b) checking from a table the feedback period of channel quality indicator according to the estimated channel gain;
• and
• c) feeding back the channel quality indicator by using wireless resources assigned for the feedback of channel quality indicator according to the checked feedback period of channel quality indicator,
• where the better a channel state checked from the estimated channel gain, the shorter the feedback period of channel quality indicator is set.

The method for determining a feedback period for providing channel quality indicator in a mobile station for a wireless communication system, comprising steps of:

• a) estimating a moving velocity of a mobile station;
• b) checking from a table the feedback period of channel quality indicator according to the estimated moving velocity of the mobile station;
• and
• c) feeding back the channel quality indicator by using wireless resources assigned for the feedback of channel quality indicator according to the checked feedback period of channel quality indicator,
• where the faster the estimated moving velocity of the mobile station, the shorter the feedback period of channel quality indicator is set.

A method for determining a feedback period of channel quality indicator in a mobile station for a wireless communication system, comprising steps of:

• a) estimating a channel gain based on a signal received from a base station;
• b) measuring a moving velocity of a mobile station;
• c) checking the feedback period of channel quality indicator according to a combination of the estimated channel gain and the moving velocity of the mobile station;
• and
• d) feeding back estimated channel quality indicator by using wireless resources assigned for the feedback of channel quality indicator according to the checked feedback period of channel quality indicator.