This includes information about the dynamic part of the HS-DSCH transport format, including transport block set size and modulation scheme. The TFRI also includes information about the set of channelization codes onto which HS-DSCH is mapped in the corresponding HS-DSCH transmission. The number of bits defined are: – Channelization-code set -7 bits. – Modulation scheme – 1 bit. – Transport-block size – 6 bits.