PDCCH enhancements for radar coexistence

1 . A method for a wireless transmit receive unit (WTRU), the method comprising:

receiving configuration information of multiple physical downlink control channel (PDCCH) control resource sets (CORESETs) including at least a first PDCCH CORESET identifying first frequency resources of a downlink (DL) bandwidth part (BWP) for detection of downlink control information (DCI) and a second PDCCH CORESET identifying second frequency resources of the DL BWP for detection of DCI;

monitoring one or more search spaces linked to active PDCCH CORESETs for transmissions of DCI;

receiving signaling from a network to suspend monitoring of all search spaces linked to one of the first PDCCH CORESET or the second PDCCH CORESET to mitigate an interference event in the corresponding first frequency resources or the second frequency resources, irrespective of whether search spaces are linked to each other; the received signaling including a suspend time period;

continuing monitoring for DCI transmissions in the one or more search spaces linked to the active PDCCH CORESETS other than the search spaces linked to a corresponding suspended first PDCCH CORESET or suspended second PDCCH CORESET; and

resuming monitoring search spaces linked to the corresponding suspended PDCCH CORESET upon occurrence of the suspend time period or receiving unsuspend CORESET signaling.

2 . The method of claim 1 , wherein the first frequency resources and second frequency resources are different.

3 . The method of claim 1 , wherein different PDCCH CORESETs are associated with a same or different CORESET pool and wherein different PDCCH CORESETs are associated with a same or different TCI states.

4 . The method of claim 1 , wherein the suspend time period may include one or more values representing a time for suspension or a special value indicating indefinite suspension.

5 . The method of claim 1 , further comprising:

receiving update signaling including a new bitmap designating which CORESET(s) to suspend and unsuspend and/or a new suspend time period, and wherein suspended monitoring of search spaces occurs for a duration of the new suspend time period.

6 . The method of claim 1 , wherein the received signaling indicates bypassing a PDCCH blind search over any search spaces linked to a suspended PDCCH CORESET.

7 . The method of claim 1 , wherein the received signaling is in response to network detection of an interferer of PDCCH resources.

8 . The method of claim 1 , wherein the received signaling comprises one of a medium access control (MAC) control element (CE), dedicated DCI signaling or WTRU group common signaling.

9 . The method of claim 1 , wherein the received signaling comprises a bitmap designating which CORESET to suspend and unsuspend.

10 . A wireless transmit receive unit (WTRU) comprising:

a receiver and a processor in communication with the receiver, the receiver and processor configured to:

receive configuration information of multiple physical downlink control channel (PDCCH) control resource sets (CORESETs) including at least a first PDCCH CORESET identifying first frequency resources of a downlink (DL) bandwidth part (BWP) for detection of downlink control information (DCI) and a second PDCCH CORESET identifying second frequency resources of the DL BWP for detection of DCI;

monitor one or more search spaces linked to active PDCCH CORESETs for transmissions of DCI;

receive signaling from a network to suspend monitoring of all search spaces linked to one of the first PDCCH CORESET or the second PDCCH CORESET to mitigate an interference event in the corresponding first frequency resources or the second frequency resources, irrespective of whether search spaces are linked to each other; the received signaling including a suspend time period;

continue monitoring for DCI transmissions in the one or more search spaces linked to the active PDCCH CORESETS other than search spaces linked to a corresponding suspended first PDCCH CORESET or suspended second PDCCH CORESET; and

resume monitoring search spaces linked to the corresponding suspended PDCCH CORESET upon occurrence of the suspend time period or receiving unsuspend CORESET signaling.

11 . The WTRU of claim 10 , wherein different PDCCH CORESETs are associated with a same or different CORESET pool or wherein different PDCCH CORESETs are associated with the same or different TCI states.

12 . The WTRU of claim 10 , wherein the suspend time period may include one or more values representing a time for suspension or a special value indicating indefinite suspension.

13 . The WTRU of claim 10 , wherein the receiver and processor are further configured to:

receive update signaling including a bitmap designating which CORESET(s) to suspend and unsuspend and/or a new suspend time period, and wherein suspended monitoring of search spaces occurs for a duration of the new suspend time period.

14 . The WTRU of claim 10 , wherein the received signaling causes bypassing a PDCCH blind search over any search spaces linked to a suspended PDCCH CORESET.

15 . The WTRU of claim 10 , wherein the received signaling is in response to network detection of an interferer of PDCCH resources.

16 . The WTRU of claim 10 , wherein the received signaling comprises one of a medium access control (MAC) control element (CE), dedicated DCI signaling or WTRU group common signaling.

17 . The WTRU of claim 10 , wherein the received signaling comprises a bitmap designating which CORESET to suspend and unsuspend.