Control channel element detection method using cqi in a wireless communication system

A Control Channel Element (CCE) detection apparatus of a mobile station, comprising:

• a CCE controller that searches a current subframe for CCEs;
• a decoder that decodes the current subframe, when the CCEs are found;
• and
• a determiner that determines whether the CCEs carried by the subframe are transmitted for the mobile terminal, based on a result of decoding the current subframe,
• wherein the CCE controller searches the subframe for the CCEs by changing a size type of the CCEs according to a result of a comparison between a Channel Quality Indicator (CQI) of the current subframe and a CQI of a previous subframe or the determiner de-rates the current frame while changing a code rate of the CCEs according to a value of the CQI of the current subframe.

A Control Channel Element (CCE) detection method of a mobile station using a Channel Quality Indicator (CQI) in a wireless communication system, comprising:

• searching a current subframe for CCEs;
• and
• locating the CCEs carrying control information for the mobile station by decoding the subframe,
• wherein locating the CCEs comprises de-rating the current subframe while changing a code rate of the CCEs according to a value of a CQI of the current subframe.

A Control Channel Element (CCE) detection apparatus of a mobile station, comprising:

• a CCE controller that searches a current subframe for CCEs;
• a decoder that decodes the current subframe, when the CCEs are found;
• and
• a determiner that determines whether the CCEs carried by the current subframe are transmitted for the mobile terminal, based on a result of decoding the current subframe,
• wherein the determiner de-rates the current subframe while changing a code rate of the CCEs according to a value of a Channel Quality Indicator (CQI) of the current subframe.