Scheduling enhancements for wireless communication systems

A user equipment (UE) comprising:

• a transceiver configured to receive information for scheduling on a primary cell from the primary cell and from a secondary cell;
• and
• a processor operably coupled to the transceiver, the processor configured to:
• identify a number of physical downlink control channel (PDCCH) candidates on the primary cell in a slot and a number of non-overlapping control channel elements (CCEs) on the primary cell in the slot based on the information;
• and
• identify, for scheduling on the primary cell from the primary cell, that at least one of:
• the number of PDCCH candidates exceeds a first number of PDCCH candidates, and
• the number of non-overlapping CCEs exceeds a first number of non-overlapping CCEs;
• and
• cancel PDCCH receptions corresponding to UE-specific search space (USS) sets for scheduling on the primary cell from the primary cell,
• wherein the transceiver is further configured to receive all PDCCHs for scheduling on the primary cell from the secondary cell,
• wherein PDCCH candidates on the primary cell are with a first subcarrier spacing (SCS) configuration,
• wherein PDCCH candidates on the secondary cell are with a second SCS configuration, and
• wherein the slot corresponds to a smaller of the first SCS and the second SCS.

A base station comprising:

• a transceiver configured to transmit:
• information for scheduling on a primary cell from the primary cell and from a secondary cell, wherein the information indicates a number of physical downlink control channel (PDCCH) candidates on the primary cell in a slot and a number of non-overlapping control channel elements (CCEs) on the primary cell in the slot;
• and
• all PDCCHs for scheduling on the primary cell from the secondary cell,
• wherein PDCCH candidates on the primary cell are with a first subcarrier spacing (SCS) configuration,
• wherein PDCCH candidates on the secondary cell are with a second SCS configuration, and
• wherein the slot corresponds to a smaller of the first SCS and the second SCS.