The method and apparatus for transmitting and receiving downlink control channel

A user equipment (UE) for receiving a physical downlink control channel (PDCCH) in a wireless communication system, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• receiving, from a base station (BS) through the at least one transceiver, (i) first information related to a resource element group (REG) bundle size and (ii) second information related to an interleaver size for interleaving REG bundles;
• and
• receiving, from the BS through the at least one transceiver, the PDCCH over a control resource set (CORESET) that comprises a plurality of REGs that are bundled into a plurality of REG bundles based on the first information, based on the first information and the second information,
• wherein an interleaver is determined based on (i) the second information and (ii) a number of the plurality of REG bundles included in the CORESET,
• wherein the plurality of REG bundles are interleaved within the CORESET based on the interleaver, and
• wherein, based on a value of the second information being equal to a number of REG bundles included in a control channel element (CCE) of the CORESET, the REG bundles of the CCE are mapped to physical resources at a regular interval.

An apparatus for receiving a physical downlink control channel (PDCCH) in a wireless communication system, the apparatus comprising:

• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• receiving (i) first information related to a resource element group (REG) bundle size and (ii) second information related to an interleaver size for interleaving REG bundles;
• and
• receiving a physical downlink control channel (PDCCH) over a control resource set (CORESET) that comprises a plurality of REGs that are bundled into a plurality of REG bundles based on the first information, based on the first information and the second information,
• wherein an interleaver is determined based on (i) the second information and (ii) a number of the plurality of REG bundles included in the CORESET,
• wherein the plurality of REG bundles are interleaved within the CORESET based on the interleaver, and
• wherein, based on a value of the second information being equal to a number of REG bundles included in a control channel element (CCE) of the CORESET, the REG bundles of the CCE are mapped to physical resources at a regular interval.