Method and apparatus for detecting signals of a downlink control channel in a wireless communication system

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• at least one processor, operatively coupled to the transceiver, configured to control the transceiver to:
• transmit, to a user equipment (UE), an index of an initial control resource set (CORESET), wherein the index indicates a number of resource blocks and a number of symbols,
• transmit, to the UE, common control information on a common search space of the initial CORESET,
• transmit, to the UE, configuration, information for an extended CORESET, wherein the configuration information includes information on an aggregation level set for available control channel elements (CCEs), and
• transmit, to the UE, UE-specific control information on a UE-specific search space of the extended CORESET.

A user equipment (UE) in a wireless communication system, the UE comprising:

• a transceiver;
• and
• at least one processor, operatively coupled to the transceiver, configured to control the transceiver to:
• receive, from a base station, an index of an initial control resource set (CORESET), wherein the index indicates a number of resource blocks and a number of symbols,
• receive, from the base station, common control information on a common search space of the initial CORESET,
• receive, from the base station, configuration information for an extended CORESET, wherein the configuration information includes information on an aggregation level set for available control channel elements (CCEs), and
• receive, from the base station, UE-specific control information on a UE-specific search space of the extended CORESET.

A method performed by a base station in a wireless communication system, the method comprising:

• transmitting, to a user equipment (UE), an index of an initial control resource set (CORESET), wherein the index indicates a number of resource blocks and a number of symbols;
• transmitting, to the UE, common control information on a common search space of the initial CORESET;
• transmitting, to the UE, configuration information for an extended CORESET, wherein the configuration information includes information on an aggregation level set for available control channel elements (CCEs);
• and
• transmitting, to the UE, UE-specific control information on a UE-specific search space of the extended CORESET.