Reduced PDCCH monitoring by a user equipment
A user equipment (UE) monitors a Physical Downlink Control Channel (PDCCH). The UE reports, to a base station, a reduced PDCCH monitoring capability for at least one group of search space sets (SSS) of a PDCCH, receives, from the base station, a reduced monitoring capability (MO) configuration, wherein the base station determines the reduced MO configuration based on the reported reduced PDCCH monitoring capability and monitors the PDCCH based on the reduced MO configuration.
1. One or more processors configured to perform operations comprising:
reporting, to a base station, a reduced physical downlink control channel (PDCCH) monitoring capability for at least one group of search space sets (SSS) of a PDCCH;
receiving, from the base station, a reduced monitoring capability (MO) configuration, wherein the base station determines the reduced MO configuration based on the reported reduced PDCCH monitoring capability, wherein receiving the reduced monitoring capability (MO) configuration includes receiving first and second monitoring profiles, the first monitoring profile relating to a higher power consumption and the second monitoring profile relating to a lower power consumption, wherein the second monitoring profile includes at least one of (i) a reduced number of blind decodes per slot relative to a reference number of blind decodes (ii) an increased periodicity of PDCCH monitoring, (iii) an MO window configuration for reduced PDCCH monitoring or (iv) a reduced number, relative to the first monitoring profile of different downlink control information (DCI) format sizes to monitor; and
monitoring the PDCCH based on the reduced MO configuration.
2. The one or more processors of claim 1 , wherein the operations further comprise:
determining a first SSS group comprising common search spaces (CSSs) and a second SSS group comprising UE-specific search spaces (USS).
3. The one or more processors of claim 2 , wherein the first SSS group comprises Types 0, 0A, 1 and 2 CSSs.
4. The one or more processors of claim 2 , wherein the second SSS group comprises Type 3 CSS.
5. The one or more processors of claim 2 , wherein the operations further comprise:
determining a scaling factor for the reference number of blind decodes of the PDCCH for at least one of the first SSS group or the second SSS group; and
reporting the at least one scaling factor to the base station.
6. The one or more processors of claim 1 , wherein the operations further comprise:
receiving an indication to switch from either one of the first or second monitoring profiles to the other one of the first or second monitoring profiles based on a received DCI transmission.
7. The one or more processors of claim 1 , wherein the operations further comprise:
switching from the second monitoring profile to the first monitoring profile based on a slot-based timer.
8. A user equipment (UE), comprising:
a transceiver configured to connect to a base station; and
one or more processors communicatively coupled to the transceiver and configured to perform operations comprising:
reporting, to the base station, a reduced physical downlink control channel (PDCCH) monitoring capability for at least one group of search space sets (SSS) of a PDCCH;
receiving, from the base station, a reduced monitoring capability (MO) configuration, wherein the base station determines the reduced MO configuration based on the reported reduced PDCCH monitoring capability, wherein receiving the reduced monitoring capability (MO) configuration includes receiving first and second monitoring profiles, the first monitoring profile relating to a higher power consumption and the second monitoring profile relating to a lower power consumption, wherein the second monitoring profile includes at least one of (i) a reduced number of blind decodes per slot relative to a reference number of blind decodes (ii) an increased periodicity of PDCCH monitoring, (iii) an MO window configuration for reduced PDCCH monitoring or (iv) a reduced number, relative to the first monitoring profile of different downlink control information (DCI) format sizes to monitor; and
monitoring the PDCCH based on the reduced MO configuration.
9. The UE of claim 8 , wherein the operations further comprise:
determining a first SSS group comprising common search spaces (CSSs) and a second SSS group comprising UE-specific search spaces (USS).
10. The UE of claim 9 , wherein the first SSS group comprises Types 0, 0A, 1 and 2 CSSs.
11. The UE of claim 9 , wherein the second SSS group further comprises Type 3 CSS.
12. The UE of claim 9 , wherein the operations further comprise:
determining a scaling factor for the reference number of blind decodes of the PDCCH for at least one of the first SSS group or the second SSS group; and
reporting the scaling factor to the base station.
13. The UE of claim 8 , wherein the operations further comprise:
receiving an indication to switch from either one of the first or second monitoring profiles to the other one of the first or second monitoring profiles based on a received DCI transmission.
14. The UE of claim 8 , wherein the operations further comprise:
switching from the second monitoring profile to the first monitoring profile based on a slot-based timer.