User equipments, base stations and methods

A base station apparatus comprising:

• a higher layer processor configured to send a common radio resource control (RRC) configuration including a first control resource set (CORESET) configuration, the first CORESET configuration specifying Type-0 common search space;
• physical downlink control channel (PDCCH) transmitting circuitry configured to transmit a PDCCH;
• and
• physical downlink shared channel (PDSCH) transmitting circuitry configured to transmit a PDSCH, upon a transmission of the PDCCH;
• wherein
• the higher layer processor is further configured to send a dedicated RRC configuration including a second CORESET configuration,
• the second CORESET configuration specifies UE-specific search space,
• the second CORESET configuration includes information for indicating a downlink control information (DCI) format,
• the PDCCH with the indicated DCI format is transmitted in the UE-specific search space,
• the first CORESET configuration does not include the information for indicating any DCI format, and
• the PDCCH with a predefined DCI format is transmitted in the Type-0 common search space.

A method for a user equipment (UE), the method comprising:

• acquiring a common radio resource control (RRC) configuration including a first control resource set (CORESET) configuration, the first CORESET configuration specifying Type-0 common search space;
• monitoring a physical downlink control channel (PDCCH);
• and
• receiving a physical downlink shared channel (PDSCH), upon a detection of the PDCCH;
• wherein
• the method further comprise acquiring a dedicated RRC configuration including a second CORESET configuration,
• the second CORESET configuration specifies UE-specific search space,
• the second CORESET configuration includes information for indicating a downlink control information (DCI) format,
• the PDCCH with the indicated DCI format is monitored in the UE-specific search space,
• the first CORESET configuration does not include the information for indicating any DCI format, and
• the PDCCH with a predefined DCI format is monitored in the Type-0 common search space.

A method for a base station apparatus, the method comprising:

• sending a common radio resource control (RRC) configuration including a first control resource set (CORESET) configuration, the first CORESET configuration specifying Type-0 common search space;
• transmitting a physical downlink control channel (PDCCH);
• and
• transmitting a physical downlink shared channel (PDSCH), upon a transmission of the PDCCH;
• wherein
• sending a dedicated RRC configuration including a second CORESET configuration,
• the second CORESET configuration specifies UE-specific search space,
• the second CORESET configuration includes information for indicating a downlink control information (DCI) format,
• the PDCCH with the indicated DCI format is transmitted in the UE-specific search space,
• the first CORESET configuration does not include the information for indicating any DCI format, and
• the PDCCH with a predefined DCI format is transmitted in the Type-0 common search space.