Physical downlink control channel monitoring in wireless communication system
Provided are a method by which a terminal monitors a downlink control channel in a wireless communication system and a corresponding device. An offset-based time window is set before a conventional DRX-on period for monitoring PDCCH, and PSPDCCH for notifying of power saving information in the time window is monitored. Whether to actually monitor the PDCCH in the DRX-on period can be determined on the basis of the PS-PDCCH.
1. A method of monitoring a physical downlink control channel (PDCCH) of a user equipment (UE) in a wireless communication system, the method comprising:
receiving a configuration related to a plurality of PDCCH monitoring occasions;
receiving an offset based on a starting slot of a discontinuous reception (DRX)-on duration; and
monitoring a PS-PDCCH notifying of power saving (PS) information in at least one PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions,
wherein the PS-PDCCH is not monitored in the DRX-on duration, and
wherein the PS-PDCCH is monitored in the at least one PDCCH monitoring occasion located in a time window between a time based on the offset and the starting slot of the DRX-on duration.
2. The method of claim 1 , wherein the at least one PDCCH monitoring occasion is located in one or a plurality of consecutive slots.
3. The method of claim 1 , wherein the at least one PDCCH monitoring occasion is located periodically.
4. The method of claim 1 , wherein the offset is received through a higher layer signal from a network.
5. The method of claim 1 , wherein the PS-PDCCH comprises a field indicating whether the UE wakes up.
6. The method of claim 5 , wherein if the field indicating whether the UE wakes up indicates the wake-up of the UE, the PDCCH is monitored in the DRX-on duration.
7. The method of claim 5 , wherein if the field indicating whether the UE wakes up does not indicate the wake-up of the UE, the PDCCH is not monitored in the DRX-on duration.
8. The method of claim 1 , wherein the PS-PDCCH is not monitored in a PDCCH monitoring occasion not located within the time window among the plurality of PDCCH monitoring occasions.
9. A user equipment (UE) comprising:
a transceiver transmitting and receiving a radio signal; and
a processor operatively coupled with the transceiver,
wherein the processor is configured to:
receive a configuration related to a plurality of PDCCH monitoring occasions,
receive an offset based on a starting slot of a discontinuous reception (DRX)-on duration, and
monitor a PS-PDCCH notifying of power saving (PS) information in at least one PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions,
wherein the PS-PDCCH is not monitored in the DRX-on duration, and
wherein the PS-PDCCH is monitored in the at least one PDCCH monitoring occasion located in a time window between a time based on the offset and the starting slot of the DRX-on duration.
10. The UE of claim 9 , wherein the at least one PDCCH monitoring occasion is located in one or a plurality of consecutive slots.
11. The UE of claim 9 , wherein the at least one PDCCH monitoring occasion is located periodically.
12. The UE of claim 9 , wherein the offset is received through a higher layer signal from a network.
13. The UE of claim 9 , wherein the PS-PDCCH comprises a field indicating whether the UE wakes up.
14. The UE of claim 13 , wherein if the field indicating whether the UE wakes up indicates the wake-up of the UE, the PDCCH is monitored in the DRX-on duration.
15. The UE of claim 13 , wherein if the field indicating whether the UE wakes up does not indicate the wake-up of the UE, the PDCCH is not monitored in the DRX-on duration.
16. The UE of claim 9 , wherein the PS-PDCCH is not monitored in a PDCCH monitoring occasion not located within the time window among the plurality of PDCCH monitoring occasions.
17. A method of transmitting a physical downlink control channel (PDCCH) of a base station (BS) in a wireless communication system, the method comprising:
transmitting a configuration related to a plurality of PDCCH monitoring occasions;
transmitting an offset based on a starting slot of a discontinuous reception (DRX)-on duration; and
transmitting a PS-PDCCH notifying of power saving (PS) information in at least one physical downlink control (PDCCH) monitoring occasion among the plurality of PDCCH monitoring occasions,
wherein the PS-PDCCH is not transmitted in the DRX-on duration, and
wherein the PS-PDCCH is transmitted in the at least one PDCCH monitoring occasion located in a time window between a time based on the offset and the starting slot of the DRX-on duration.
18. An apparatus of a wireless communication system, the apparatus comprising:
a processor; and
a memory operatively coupled with the processor,
the processor is configured to:
receive a configuration related to a plurality of PDCCH monitoring occasions,
receive an offset based on a starting slot of a discontinuous reception (DRX)-on duration; and
monitor a PS-PDCCH notifying of power saving (PS) information in at least one physical downlink control (PDCCH) monitoring occasion among the plurality of PDCCH monitoring occasions,
wherein the PS-PDCCH is not monitored in the DRX-on duration, and
wherein the PS-PDCCH is monitored in the at least one PDCCH monitoring occasion located in a time window between a time based on the offset and the starting slot of the DRX-on duration.