초록 ▼

A wireless communication apparatus is capable of improving communication efficiency by reducing the amount of control information transmitted. A channel quality information extraction section extracts CQI's from a received signal. An allocation control section allocates subcarriers for every communi

A wireless communication apparatus is capable of improving communication efficiency by reducing the amount of control information transmitted. A channel quality information extraction section extracts CQI's from a received signal. An allocation control section allocates subcarriers for every communication terminal apparatus and selects a modulation scheme in such a manner that required transmission rate is satisfied for each communication terminal apparatus based on required transmission rate information, etc. and CQI's for communication terminal apparatus of each user. A required subcarrier number determining section decides the number of subcarriers allocated to every communication terminal apparatus so as to satisfy the required transmission rate for each communication terminal apparatus. A required subcarrier number information generating section generates information for the number of subcarriers allocated to every communication terminal apparatus. A subcarrier allocation section allocates packet data to selected subcarriers. Modulating sections adaptively modulate packet data allocated to each subcarrier.

대표청구항 ▼

1. A communication apparatus, comprising: a transmitter, which, in operation, transmits control information to a terminal, the control information including an indication to the terminal selected from a plurality of indications, the plurality of indications including: an indication to transmit a fir

1. A communication apparatus, comprising: a transmitter, which, in operation, transmits control information to a terminal, the control information including an indication to the terminal selected from a plurality of indications, the plurality of indications including: an indication to transmit a first set of channel quality indicators (CQIs) representing channel qualities for all subcarriers in a communication band; andan indication to transmit a second CQI representing channel quality for subcarriers selected among the all subcarriers and position information of the selected subcarriers, wherein a first data volume associated with the second CQI and the position information is less than a second data volume associated with the first set of CQIs; anda receiver, which, in operation, receives, from the terminal based on the indication included in the transmitted control information, one of: the first set of CQIs; andthe second CQI and the position information. 2. The communication apparatus of claim 1 wherein the selected indication is based in part on the first data volume associated with the second CQI and the position information. 3. The communication apparatus of claim 1 wherein the control information includes: information related to a quantity of subcarriers to be selected among the all subcarriers. 4. A method, comprising: transmitting, by a communication apparatus, control information to a terminal, the control information including an indication to the terminal selected from a plurality of indications, the plurality of indications including: an indication to transmit a first set of channel quality indicators (CQIs) re channel qualities for all subcarriers in a communication band; andan indication to transmit a second CQI representing channel quality for subcarriers selected among the all subcarriers in the communication band and position information of the selected subcarriers, wherein a first data volume associated with the second CQI and the position information is less than a second data volume associated with the first set of CQIs; andreceiving, by the communication apparatus from the terminal based on the indication included in the transmitted control information, one of: the first set of CQIs; andthe second CQI and the position information. 5. The method of claim 4 wherein the control information includes: information related to a quantity of subcarriers to be selected among the all subcarriers. 6. The method of claim 4 wherein the selected indication is based in part on the first data volume associated with the second CQI and the position information. 7. A system, comprising: means for transmitting control information to a terminal, the control information including an indication to the terminal selected from a plurality of indications, the plurality of indications including: an indication to transmit a first set of channel quality indicators (CQIs) representing channel qualities for all subcarriers in a communication band; andan indication to transmit a second CQI representing channel quality for subcarriers selected among the all subcarriers in the communication band and position information of the selected subcarriers, wherein a first data volume associated with the second CQI and the position information is less than a second data volume associated with the first set of CQIs; andmeans for receiving, from the terminal based on the indicating included in the transmitted control information, one of: the first set of CQIs; andthe second CQI and the position information. 8. The system of claim 7 wherein the selected indication is based in part on the first data volume associated with the second CQI and the position information. 9. The system of claim 7 wherein the control information includes: information related to a quantity of subcarriers to be selected among the all subcarriers.