Methods, systems, and apparatuses for beam management
Wireless communications are described. A base station may send control information for scheduling data to be transmitted to the wireless device via a downlink. The control information may comprise one or more indications of wireless resources to be used by the wireless device to receive the data. The wireless device may receive the data based on one or more determinations/conditions, such as satisfying a time offset (e.g., between reception of the downlink information and a scheduled transmission of the data), whether a control resource set is configured to indicate a transmission configuration state, and/or whether the control information indicates a transmission configuration state.
1. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive one or more physical downlink shared channel (PDSCH) configuration parameters indicating one or more transmission configuration indication (TCI) state configurations to configure quasi co-location (QCL) relationships between at least one downlink reference signal and demodulation reference signal (DM-RS) ports of PDSCH of a cell;
receive downlink control information (DCI) scheduling a PDSCH for the cell, wherein a time offset between a reception of the DCI and the PDSCH is less than a time duration threshold for QCL;
based on the time offset being less than the time duration threshold, determine two TCI states for receiving the PDSCH, wherein the two TCI states indicate downlink reference signals with QCL types set to QCL TypeD; and
based on both of the downlink reference signals, with the QCL type set to the QCL TypeD, indicated by the two TCI states being different from a reference signal, with a QCL type set to QCL TypeD, used for receiving a downlink reception that overlaps with the PDSCH in at least one symbol, prioritize one of the downlink reception or the PDSCH.
2. The wireless device of claim 1 , wherein:
the cell is a first cell;
the PDSCH is via the first cell;
the downlink reception is via a second cell.
3. The wireless device of claim 2 , wherein the first cell and the second cell operate in intra-band carrier aggregation (CA).
4. The wireless device of claim 1 , wherein the reference signal used for receiving the downlink reception is not quasi co-located, with respect to QCL Type D, with:
a first reference signal indicated by a first TCI state of the two TCI states; and
a second reference signal indicated by a second TCI state of the two TCI states.
5. The wireless device of claim 4 , wherein the reference signal, used for receiving the downlink reception, is indicated by a QCL assumption of the downlink reception.
6. The wireless device of claim 5 , wherein the QCL assumption of the downlink reception is a TCI state.
7. The wireless device of claim 1 , wherein the PDSCH is prioritized among the downlink reception and the PDSCH.
8. The wireless device of claim 1 , wherein the downlink reception is prioritized among the downlink reception and the PDSCH.
9. The wireless device of claim 8 , wherein prioritization of the downlink reception comprises receiving the PDSCH using a QCL assumption of the downlink reception.
10. The wireless device of claim 9 , wherein at least one DM-RS port of the PDSCH is quasi co-located with the reference signal indicated by the QCL assumption of the downlink reception with respect to QCL TypeD.
11. The wireless device of claim 8 , wherein prioritization of the downlink reception comprises dropping reception of the PDSCH.
12. The wireless device of claim 9 , wherein the QCL assumption of the downlink reception is a TCI state.
13. The wireless device of claim 1 , wherein:
the PDSCH is a first PDSCH reception; and
the downlink reception is a second PDSCH reception.
14. The wireless device of claim 1 , wherein the two TCI states for receiving the PDSCH indicate two QCL assumptions.
15. The wireless device of claim 1 , wherein the instructions further cause the wireless device to:
receive, via a control resource set (coreset), a second DCI scheduling a second PDSCH, wherein:
the second DCI does not comprise a TCI field; and
a time offset between reception of the second DCI and the second PDSCH is equal to or greater than the time duration threshold; and
receive, using two TCI states, the second PDSCH based on:
the second DCI not comprising the TCI field; and
the time offset between reception of the second DCI and the second PDSCH being equal to or greater than the time duration threshold, wherein the two TCI states used to receive the second PDSCH comprises a TCI state or a QCL assumption of the coreset that the wireless device receives the second DCI.
16. The wireless device of claim 15 , wherein the coreset is not configured with a TCI-present-in-DCI parameter indicating that DCIs transmitted via the coreset does not comprise a TCI field.
17. The wireless device of claim 15 , wherein the instructions further cause the wireless device to monitor, via the coreset, downlink control channels using the TCI state or the QCL assumption.
18. The wireless device of claim 1 , wherein the instructions further cause the wireless device to:
receive a second DCI scheduling a second PDSCH, wherein:
a time offset between reception of the second DCI and the second PDSCH is equal or greater than the time duration threshold; and
the second DCI comprises a TCI field indicating two TCI states for the second PDSCH;
receive a third DCI scheduling a downlink signal, wherein:
a time offset between reception of the third DCI and the downlink signal is less than a second time duration threshold; and
the downlink signal overlaps in at least one symbol with the second PDSCH; and
receive the downlink signal using a first TCI state of the two TCI states of the second PDSCH based on:
the time offset between reception of the third DCI and the downlink signal being less than the second time duration threshold; and
the downlink signal overlapping in the at least one symbol with the second PDSCH.
19. The wireless device of claim 1 , wherein:
at least one DM-RS port of the downlink reception is quasi co-located with the reference signal with respect to QCL TypeD; and
the downlink reception is prioritized among the PDSCH and the downlink reception.
20. The wireless device of claim 19 , wherein the instructions further cause the wireless device to:
receive a second DCI scheduling a second PDSCH, wherein:
a time offset between reception of the second DCI and the second PDSCH is equal or greater than the time duration threshold; and
the second DCI comprises a TCI field indicating two TCI states for the second PDSCH;
receive a third DCI scheduling a downlink signal, wherein:
a time offset between reception of the third DCI and the downlink signal is less than a second time duration threshold; and
the downlink signal overlaps in at least one symbol with the second PDSCH; and
receive the downlink signal using a first TCI state of the two TCI states of the second PDSCH based on:
the time offset between reception of the third DCI and the downlink signal being less than the second time duration threshold; and
the downlink signal overlapping in the at least one symbol with the second PDSCH.