Method for monitoring physical downlink control channel, and device using same

1. A method for monitoring a physical downlink control channel (PDCCH) of a user equipment (UE) in a wireless communication system, the method comprising:

receiving a higher layer signal informing of an offset;

monitoring a PS-PDCCH informing power saving (PS) information in at least one PDCCH monitoring occasion located in a time window between a time based on the offset and a starting slot of a discontinuous reception-on (DRX-on) duration; and

performing PDCCH monitoring in the DRX-on duration based on the detected PS-PDCCH,

wherein the PS-PDCCH includes information for a specific search space set among a plurality of search space sets configured for the DRX-on duration,

wherein the PDCCH is monitored in search spaces other than the specific search space set among the plurality of search space sets, and

wherein a timing of applying PDCCH monitoring based on the PS-PDCCH is determined to be a same as a minimum applicable delay value applied to a cross-slot scheduling.

2. The method of claim 1 , wherein a time interval for skipping the PDCCH monitoring in the specific search space set is informed or predetermined by a network.

3. The method of claim 2 , wherein in the time interval, monitoring for other PS-PDCCH is maintained, and

wherein the other PS-PDCCH includes information informing the UE to wake-up for the specific search space set.

4. The method of claim 1 , wherein the PS-PDCCH includes a bitmap informing the specific search space set.

5. The method of claim 1 , further comprising:

receiving a higher layer signal informing a predetermined number of search space sets to which PDCCH monitoring on/off can be applied among the plurality of search space sets,

wherein the PS-PDCCH includes a bitmap informing the specific search space set among the predetermined number of search space sets.

6. The method of claim 5 , wherein a number of bits of the bitmap is determined based on the predetermined number.

7. The method of claim 1 , wherein the PS-PDCCH further comprises a field informing a wake-up of the UE.

8. The method of claim 1 , further comprising:

receiving a higher layer signal informing whether to activate or deactivate PDCCH monitoring skip in a search space informed by the PS-PDCCH.

9. The method of claim 8 , wherein, only when the higher layer signal informs the activation, PDCCH monitoring can be skipped in the search space informed by the PS-PDCCH.

10. A user equipment (UE) comprising:

at least one transceiver transmitting and receiving a radio signal; and

at least one processor operatively coupled with the at least one transceiver,

wherein the at least one processor receives a higher layer signal informing of an offset, monitors a PS-PDCCH informing power saving (PS) information in at least one PDCCH monitoring occasion located in a time window between a time based on the offset and a starting slot of a discontinuous reception-on (DRX-on) duration, and

performs PDCCH monitoring in the DRX-on duration based on the detected PS-PDCCH,

wherein the PS-PDCCH includes information for a specific search space set among a plurality of search space sets configured for the DRX-on duration,

wherein the PDCCH is monitored in search spaces other than the specific search space set among the plurality of search space sets,

wherein a timing of applying PDCCH monitoring based on the PS-PDCCH is determined to be a same as a minimum applicable delay value applied to a cross-slot scheduling.

11. The UE of claim 10 , wherein a time interval for skipping the PDCCH monitoring in the specific search space set is informed or predetermined by a network.

12. The UE of claim 11 , wherein in the time interval, monitoring for other PS-PDCCH is maintained, and

wherein the other PS-PDCCH includes information informing the UE to wake-up for the specific search space set.

13. The UE of claim 10 , wherein the PS-PDCCH includes a bitmap informing the specific search space set.

14. The UE of claim 10 , the processor receives a higher layer signal informing a predetermined number of search space sets to which PDCCH monitoring on/off can be applied among the plurality of search space sets,

wherein the PS-PDCCH includes a bitmap informing the specific search space set among the predetermined number of search space sets.

15. The UE of claim 14 , wherein a number of bits of the bitmap is determined based on the predetermined number.

16. The UE of claim 10 , wherein the PS-PDCCH further comprises a field informing a wake-up of the UE.

17. The UE of claim 10 , the processor further receives a higher layer signal informing whether to activate or deactivate PDCCH monitoring skip in a search space informed by the PS-PDCCH.

18. An apparatus of a wireless communication system, the apparatus comprising:

a processor; and

a memory operatively coupled with the processor,

wherein the processor receives a higher layer signal informing of an offset, monitors a PS-PDCCH informing power saving (PS) information in at least one PDCCH monitoring occasion located in a time window between a time based on the offset and a starting slot of a discontinuous reception-on (DRX-on) duration, and

performs PDCCH monitoring in the DRX-on duration based on the detected PS-PDCCH,

wherein the PS-PDCCH includes information for a specific search space set among a plurality of search space sets configured for the DRX-on duration,

wherein the PDCCH is monitored in search spaces other than the specific search space set among the plurality of search space sets, and

wherein a timing of applying PDCCH monitoring based on the PS-PDCCH is determined to be a same as a minimum applicable delay value applied to a cross-slot scheduling.