Transport block size determination in communication networks

A method for determining a transport block size for a Physical Uplink Shared Channel (PUSCH) transmission, the method comprising:

• determining whether an Orthogonal Cover Code (OCC) is applied to the PUSCH transmission;
• determining a spreading factor of the OCC in a case that the OCC is applied to the PUSCH transmission;
• determining whether a condition is satisfied for determining the transport block size;
• and
• determining the transport block size using a scaling factor in a case that the condition is satisfied, the scaling factor being determined based on the spreading factor,
• wherein the condition comprises whether a Modulation-and-Coding-Scheme (MCS) field that is in a downlink control information (DCI) format and that is allocated for the PUSCH transmission indicates that at least one of a modulation scheme or a code rate is within a predetermined range corresponding to low coding rates, and
• wherein determining whether the condition is satisfied comprises determining that the condition is satisfied in a case that the MCS field indicates that the at least one of the modulation scheme or the code rate is within the predetermined range.

A base station apparatus, comprising:

• one or more non-transitory computer-readable media storing one or more computer-executable instructions for determining a transport block size for a Physical Uplink Shared Channel (PUSCH) transmission;
• and
• at least one processor coupled to the one or more non-transitory computer-readable media, and configured to execute the one or more computer-executable instructions to cause the base station apparatus to:
• determine whether an Orthogonal Cover Code (OCC) is applied to the PUSCH transmission;
• determine a spreading factor of the OCC in a case that the OCC is applied to the PUSCH transmission;
• determine whether a condition is satisfied for determining the transport block size;
• and
• determine the transport block size using a scaling factor in a case that the condition is satisfied, the scaling factor being determined based on the spreading factor,
• wherein the condition comprises whether a Modulation-and-Coding-Scheme (MCS) field that is in a downlink control information (DCI) format and that is allocated for the PUSCH transmission indicates that at least one of a modulation scheme or a code rate is within a predetermined range corresponding to low coding rates, and
• wherein determining whether the condition is satisfied comprises determining that the condition is satisfied in a case that the MCS field indicates that the at least one of the modulation scheme or the code rate is within the predetermined range.