Which of the following parameters In the NR MIB message indicates the time-domain position of CORESET 0?

The Master Information Block (MIB) contains the pdcch-ConfigSIB1 parameter, which is an 8-bit field used to determine the configuration of Control Resource Set 0 (CORESET 0). This 8-bit value is composed of two 4-bit parts. The least significant four bits correspond to the searchSpaceZero index. This index points to a table in the 3GPP specifications (TS 38.213) that defines the set of monitoring occasions (i.e., specific slots and symbols) where the UE should look for the PDCCH that schedules SIB1. This directly specifies the time-domain position for monitoring.

A: The System Frame Number (SFN) provides a long-term timing reference but does not define the specific location of CORESET 0 within a slot. B: The most significant four bits of pdcch-ConfigSIB1 (controlResourceSetZero) determine parameters like the number of resource blocks and OFDM symbols (duration) of CORESET 0, not its monitoring position. C: The ssb-subcarrierOffset parameter in the MIB specifies the frequency-domain offset of the SS/PBCH block, not the time-domain position of CORESET 0.

- 3GPP TS 38.331, V17.2.0, Section 6.2.2, "MIB". This specifies the contents of the MIB, including the pdcch-ConfigSIB1 information element.

- 3GPP TS 38.213, V17.2.0, Section 13, "UE procedure for receiving control information". Tables 13-11 through 13-15 show how the searchSpaceZero index (derived from the LSBs) maps to monitoring slot periodicity and offset.