| 摘要 |
<P>PROBLEM TO BE SOLVED: To make diffusivity to be used by radio base station equipment and a radio terminal device common and to construct "Category O" information compatible with an FDMA system when using a CDMA system as a user multiplication system of an L1/L2 control channel in a reverse link of the OFDM system. <P>SOLUTION: The radio base station equipment for using a CDMA system as a user multiplexing system of an L1/L2 control channel in the reverse link of the OFDM system calculates a usable maximum diffusivity from the predetermined number of transmission bits per user, the number of subcarriers assigned per TTI, modulation rate determined for every modulation system, and an encoding rate, performs encoding division multiplexing in accordance with the calculated diffusivity with respect to control information of each user, includes information on the number of subcarriers assigned per TTI, the modulation system, and encoding ratio in "Category O" information, and transmits by radio it to the radio terminal device together with the encoding division multiplexing signal to the radio terminal. <P>COPYRIGHT: (C)2008,JPO&INPIT |
