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 method comprising:
receiving, by a wireless device, one or more configuration parameters for a control resource set (CORESET);
receiving, via the CORESET, first downlink control information (DCI) associated with a physical downlink shared channel (PDSCH);
determining that the CORESET is not configured to indicate a TCI state; and
receiving, based on a first reference signal associated with a first TCI state, and based on a second reference signal associated with a second TCI state, a scheduled PDSCH transmission associated with the first DCI.
2. The method of claim 1 , further comprising:
determining a time offset between a reception of the first DCI and a reception of the scheduled PDSCH transmission associated with the first DCI; and
determining, based on the time offset being less than a time duration threshold, the first TCI state and the second TCI state.
3. The method of claim 1 , wherein the first DCI associated with the PDSCH is for scheduling the PDSCH, the method further comprising: based on the determining that the CORESET is not configured to indicate the TCI state:
determining the first TCI state; and
determining the second TCI state.
4. The method of claim 1 , wherein at least one first demodulation reference signal (DM-RS) port for the scheduled PDSCH transmission is quasi-co located with the first reference signal, and wherein at least one second DM-RS port for the scheduled PDSCH transmission is quasi co-located with the second reference signal.
5. The method of claim 4 , wherein the at least one first DM-RS port for the scheduled PDSCH transmission is quasi co-located with the first reference signal with respect to a quasi co-location type indicated by the first TCI state, and wherein the at least one second DM-RS port for the scheduled PDSCH transmission is quasi co-located with the second reference signal with respect to a quasi co-location type indicated by the second TCI state.
6. The method of claim 1 , wherein the receiving the scheduled PDSCH transmission comprises:
receiving, based on the first reference signal associated with the first TCI state, a first portion of the scheduled PDSCH transmission; and
receiving, based on the second reference signal associated with the second TCI state, a second portion of the scheduled PDSCH transmission.
7. A method comprising:
receiving, by a wireless device, one or more configuration parameters for a control resource set (CORESET);
receiving, via the CORESET, first downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH);
determining that the first DCI does not indicate a TCI state; and
receiving, based on a first reference signal associated with a first TCI state and based on a second reference signal associated with a second TCI state, a scheduled PDSCH transmission associated with the first DCI.
8. The method of claim 7 , further comprising:
determining a time offset between a reception of the first DCI and a reception of the scheduled PDSCH transmission associated with the first DCI; and
determining, based on the time offset being less than a time duration threshold, the first TCI state and the second TCI state.
9. The method of claim 7 , further comprising, based on the determining that the first DCI does not indicate the TCI state:
determining the first TCI state; and
determining the second TCI state.
10. The method of claim 7 , wherein at least one first demodulation reference signal (DM-RS) port for the scheduled PDSCH transmission is quasi-co located with the first reference signal, and wherein at least one second DM-RS port for the scheduled PDSCH transmission is quasi co-located with the second reference signal.
11. The method of claim 10 , wherein the at least one first DM-RS port for the scheduled PDSCH transmission is quasi co-located with the first reference signal with respect to a quasi co-location type indicated by the first TCI state, and wherein the at least one second DM-RS port for the scheduled PDSCH transmission is quasi co-located with the second reference signal with respect to a quasi co-location type indicated by the second TCI state.
12. The method of claim 7 , wherein the receiving the scheduled PDSCH transmission comprises:
receiving, based on the first reference signal associated with the first TCI state, a first portion of the scheduled PDSCH transmission; and
receiving, based on the second reference signal associated with the second TCI state, a second portion of the scheduled PDSCH transmission.
13. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the wireless device to:
receive one or more configuration parameters for a control resource set (CORESET);
receive, via the CORESET, first downlink control information (DCI) associated with a physical downlink shared channel (PDSCH);
determine that the CORESET is not configured to indicate a TCI state; and
receive, based on a first reference signal associated with a first TCI state, and based on a second reference signal associated with a second TCI state, a scheduled PDSCH transmission associated with the first DCI.
14. The wireless device of claim 13 , wherein the instructions, when executed by the one or more processors, configure the wireless device to:
determine a time offset between a reception of the first DCI and a reception of the scheduled PDSCH transmission associated with the first DCI; and
determine, based on the time offset being less than a time duration threshold, the first TCI state and the second TCI state.
15. The wireless device of claim 13 , wherein the first DCI associated with the PDSCH is for scheduling the PDSCH, and wherein the instructions, when executed by the one or more processors, configure the wireless device to: based on determining that the CORESET is not configured to indicate the TCI state:
determine the first TCI state; and
determine the second TCI state.
16. The wireless device of claim 13 , wherein at least one first demodulation reference signal (DM-RS) port for the scheduled PDSCH transmission is quasi-co located with the first reference signal, and wherein at least one second DM-RS port for the scheduled PDSCH transmission is quasi co-located with the second reference signal.
17. The wireless device of claim 16 , wherein the at least one first DM-RS port for the scheduled PDSCH transmission is quasi co-located with the first reference signal with respect to a quasi co-location type indicated by the first TCI state, and wherein the at least one second DM-RS port for the scheduled PDSCH transmission is quasi co-located with the second reference signal with respect to a quasi co-location type indicated by the second TCI state.
18. The wireless device of claim 13 , wherein the instructions, when executed by the one or more processors, configure the wireless device to receive the scheduled PDSCH transmission by:
receiving, based on the first reference signal associated with the first TCI state, a first portion of the scheduled PDSCH transmission; and
receiving, based on the second reference signal associated with the second TCI state, a second portion of the scheduled PDSCH transmission.
19. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the wireless device to:
receive one or more configuration parameters for a control resource set (CORESET);
receive, via the CORESET, first downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH);
determine that the first DCI does not indicate a TCI state; and
receive, based on a first reference signal associated with a first TCI state and based on a second reference signal associated with a second TCI state, a scheduled PDSCH transmission associated with the first DCI.
20. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, configure the wireless device to:
determine a time offset between a reception of the first DCI and a reception of the scheduled PDSCH transmission associated with the first DCI; and
determine, based on the time offset being less than a time duration threshold, the first TCI state and the second TCI state.
21. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, configure the wireless device to:
based on the determining that the first DCI does not indicate the TCI state:
determine the first TCI state; and
determine the second TCI state.
22. The wireless device of claim 19 , wherein at least one first demodulation reference signal (DM-RS) port for the scheduled PDSCH transmission is quasi-co located with the first reference signal, and wherein at least one second DM-RS port for the scheduled PDSCH transmission is quasi co-located with the second reference signal.
23. The wireless device of claim 22 , wherein the at least one first DM-RS port for the scheduled PDSCH transmission is quasi co-located with the first reference signal with respect to a quasi co-location type indicated by the first TCI state, and wherein the at least one second DM-RS port for the scheduled PDSCH transmission is quasi co-located with the second reference signal with respect to a quasi co-location type indicated by the second TCI state.
24. The wireless device of claim 19 , wherein the instructions, when executed by the one or more processors, configure the wireless device to receive the scheduled PDSCH transmission by:
receiving, based on the first reference signal associated with the first TCI state, a first portion of the scheduled PDSCH transmission; and
receiving, based on the second reference signal associated with the second TCI state, a second portion of the scheduled PDSCH transmission.