Spatial quasi co-location indication for control resource set and downlink bandwidth part
Certain aspects of the present disclosure provide techniques that may allow a base station and user equipment (UE) to be in agreement on spatial quasi co-location (QCL) assumptions for transmission in certain scenarios. The techniques may be used, for example, to determine QCL assumptions for downlink transmissions sent in an initial control resource set (CORESET) on an initial downlink bandwidth part (BWP) where dedicated signaling of such assumptions may be lacking. In some cases, the techniques may involve a UE determining a beam to use for monitoring for a physical downlink control channel (PDCCH) transmission on the initial CORESET in the initial downlink BWP that lacks dedicated signaling of QCL information and monitoring for the PDCCH on the initial CORESET in the initial BWP using the determined beam. Other aspects and features are also claimed and described.
1. A method of wireless communication by a user equipment (UE), the method comprising:
determining, for monitoring for a physical downlink control channel (PDCCH) transmission on an initial control resource set (CORESET) having a CORESET identifier of 0 in an initial downlink (DL) bandwidth part (BWP) having a BWP identifier of 0, quasi co-location (QCL) information from physical downlink shared channel (PDSCH) configuration information for a reference DL BWP; and
monitoring for the PDCCH transmission on the initial CORESET in the initial DL BWP using the determined QCL information.
2. The method of claim 1 , wherein the initial CORESET is configured via a master information block (MIB).
3. The method of claim 1 , wherein the reference DL BWP is a fixed DL BWP.
4. The method of claim 1 , wherein the reference DL BWP has a lowest BWP identifier that has dedicated signaling of the QCL information.
5. A method of wireless communication by a network entity, the method comprising:
signaling, based on a first downlink (DL) bandwidth part (BWP) of a control resource set (CORESET) lacking dedicated signaling of quasi co-location (QCL) information for a user equipment (UE), QCL information in physical downlink shared channel (PDSCH) configuration information for a second DL BWP regarding a beam, the beam for a physical downlink control channel (PDCCH) transmission on the CORESET in the first DL BWP, wherein the QCL information in the PDSCH configuration information is configured to indicate QCL information for determining the beam for the PDCCH transmission on the CORESET in the first DL BWP; and
transmitting the PDCCH transmission to the UE on the CORESET in the first DL BWP using the beam;
wherein the second DL BWP is a fixed DL BWP.
6. The method of claim 5 , wherein the CORESET comprises an initial CORESET configured via a master information block (MIB).
7. The method of claim 5 , wherein signaling the QCL information in the PDSCH configuration information for the second DL BWP regarding the beam comprises dedicated signaling of the QCL information in the PDSCH configuration information for the second DL BWP.
8. The method of claim 7 , wherein the QCL information from the PDSCH configuration information for the second DL BWP corresponds to a lowest BWP identifier that has dedicated signaling of QCL information.
9. A user equipment (UE) for wireless communication, the UE comprising:
a memory; and
a processor coupled to the memory, wherein the processor is configured to:
determine, for monitoring for a physical downlink control channel (PDCCH) transmission on an initial control resource set (CORESET) having a CORESET identifier of 0 in an initial downlink (DL) bandwidth part (BWP) having a BWP identifier of 0, quasi co-location (QCL) information from physical downlink shared channel (PDSCH) configuration information for a reference DL BWP; and
monitor for the PDCCH transmission on the initial CORESET in the initial DL BWP using the determined QCL information.
10. The UE of claim 9 , wherein the initial CORESET is configured via a master information block (MIB).
11. The UE of claim 9 , wherein the reference DL BWP is a fixed DL BWP.
12. The UE of claim 9 , wherein the reference DL BWP has a lowest BWP identifier that has dedicated signaling of the QCL information.
13. A network entity for wireless communication, the network entity comprising:
a memory; and
a processor coupled to the memory, wherein the processor is configured to:
signal, based on a first downlink (DL) bandwidth part (BWP) of a control resource set (CORESET) lacking dedicated signaling of quasi co-location (QCL) information for a user equipment (UE), QCL information in physical downlink shared channel (PDSCH) configuration information for a second DL BWP regarding a beam, the beam for a physical downlink control channel (PDCCH) transmission on the CORESET in the first DL BWP, wherein the QCL information in the PDSCH configuration information is configured to indicate QCL information for determining the beam for the PDCCH transmission on the CORESET in the first DL BWP; and
transmit the PDCCH transmission to the UE on the CORESET in the first DL BWP using the beam;
wherein the second DL BWP is a fixed DL BWP.
14. The network entity of claim 13 , wherein the CORESET comprises an initial CORESET configured via a master information block (MIB).
15. The network entity of claim 13 , wherein the processor is further configured to perform dedicated signaling of the QCL information in the PDSCH configuration information for the second DL BWP.
16. The network entity of claim 15 , wherein the QCL information from the PDSCH configuration information for the second DL BWP corresponds to a lowest BWP identifier that has dedicated signaling of QCL information.