Patent ID: 8023488

Claim:
A method for use in a communication apparatus that receives an orthogonal frequency division multiplexing (OFDM) signal transmitted from a base station, the OFDM signal including a plurality of carrier groups each comprising a plurality of carriers, the plurality of carrier groups being assigned transmission data for a plurality of communication apparatuses, and each of the plurality of carrier groups adopting one of a first frame configuration where the transmission data is transmitted using one modulation signal and a second frame configuration where the transmission data is transmitted using a plurality of modulated signals, the method comprising: specifying a carrier group to which transmission data for the communication apparatus is assigned, based on control information included in the received OFDM signal; and generating reception data associated with the specified carrier group based on one of the one modulated signal used in the first frame configuration and the plurality of modulated signals used in the second frame configuration.