An information communication method for performing code division multiple access communication between a base station and a plurality of mobile stations using a plurality of channelization codes, comprising:
- transmitting from said base station to one of said plurality of mobile stations a number of channelization codes assigned to said mobile station, a modulation scheme for use in code division multiple access, and an identification code corresponding to a transport block set size to said mobile station for identifying the transport block set size based on the number of the channelization codes, the modulation scheme for use in the code division multiple access, and the identification code corresponding to the transport block set size.