Transport block size and rate matching for multicast communications

An apparatus for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive, at a user equipment (UE), one or more configurations for multicast transmissions, each configuration associated with a group radio network temporary identifier (G-RNTI);
• select a modulation and coding scheme (MCS) table for the G-RNTI;
• receive downlink control information associated with the G-RNTI;
• receive a configuration of a UE-specific overhead value for the G-RNTI or a configured overhead value in the one or more configurations for multicast transmissions on a system information block;
• determine a transport block size (TBS) for a multicast transmission based on the UE-specific overhead value or the configured overhead value for the G-RNTI and the downlink control information received for the G-RNTI;
• and
• decode the multicast transmission based on the MCS table and the TBS.

A method of wireless communication, comprising:

• transmitting, by a base station, one or more configurations for multicast transmissions to one or more user equipment (UE), each configuration associated with a group radio network temporary identifier (G-RNTI);
• transmitting a configured overhead value in the one or more configurations for multicast transmissions on a system information block or a configuration of a UE-specific overhead value for the G-RNTI;
• selecting a modulation and coding scheme (MCS) table for the G-RNTI;
• transmitting downlink control information associated with the G-RNTI to the one or more UE;
• determining a transport block size (TBS) for a multicast transmission based on the configured overhead value or the UE-specific overhead value for the G-RNTI and the downlink control information for the G-RNTI;
• and
• transmitting the multicast transmission based on the MCS table and the TBS.

An apparatus for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• transmit, by a base station, one or more configurations for multicast transmissions to one or more user equipment (UE), each configuration associated with a group radio network temporary identifier (G-RNTI);
• transmit a configured overhead value in the one or more configurations for multicast transmissions on a system information block or a configuration of a UE-specific overhead value for the G-RNTI;
• select a modulation and coding scheme (MCS) table for the G-RNTI;
• transmit downlink control information associated with the G-RNTI to the one or more UE;
• determine a transport block size (TBS) for a multicast transmission based on the configured overhead value or the UE-specific overhead value for the G-RNTI and the downlink control information for the G-RNTI;
• and
• transmit the multicast transmission based on the MCS table and the TBS.