Virtual search spaces for beam indication

1. A method for wireless communication at a base station, comprising:

identifying time and frequency resources for a physical downlink shared channel (PDSCH) to be transmitted to a user equipment (UE) in a first transmission time interval (TTI);

transmitting, to the UE, configuration information for a control channel search space set in a second TTI, the second TTI preceding the first TTI, and the configuration information comprising an indication of an absence of a physical downlink control channel (PDCCH) transmission to be sent in the control channel search space set to indicate the identified time and frequency resources for the PDSCH, and a set of time and frequency resources for the control channel search space set; and

transmitting a PDSCH transmission in the first TTI using the identified time and frequency resources for the PDSCH.

2. The method of claim 1 , further comprising:

transmitting the configuration information for the control channel search space set using radio resource control signaling.

3. The method of claim 1 , wherein the configuration information comprises a control resource set configuration, a transmission configuration indication (TCI) state, and the time and frequency resources corresponding to resources of the control resource set configuration.

4. The method of claim 1 , further comprising:

transmitting, in a field of a downlink control information (DCI), a transmission configuration indication (TCI) state, wherein the TCI state comprises a spatial quasi-collocation (QCL) parameter for a beam indication.

5. The method of claim 1 , further comprising:

transmitting, in a field of a downlink control information (DCI), a transmission configuration indication (TCI) state; and

transmitting, based at least in part on a scheduling offset of the PDSCH transmission being greater than or equal to a threshold value, the PDSCH transmission in the identified time and frequency resources using a beam associated with the transmitted TCI state.

6. The method of claim 1 , further comprising:

transmitting, in a field of a downlink control information (DCI), a first transmission configuration indication (TCI) state; and

transmitting, based at least in part on a scheduling offset of the PDSCH transmission being less than or equal to a threshold value, the PDSCH transmission in the identified time and frequency resources using a first beam associated with a second TCI state, the first beam different from a second beam associated with the first TCI state, and the second TCI state of a control resource set associated with the control channel search space set.

7. The method of claim 1 , wherein the control channel search space set associated with a control resource set comprises a zero number of PDCCH candidates.

8. An apparatus for wireless communication, comprising:

means for identifying time and frequency resources for a physical downlink shared channel (PDSCH) to be transmitted to a user equipment (UE) in a first transmission time interval (TTI);

means for transmitting, to the UE, configuration information for a control channel search space set in a second TTI, the second TTI preceding the first TTI, and the configuration information comprising an indication of an absence of a physical downlink control channel (PDCCH) transmission to be sent in the control channel search space set to indicate the identified time and frequency resources for the PDSCH, and a set of time and frequency resources for the control channel search space set; and

means for transmitting a PDSCH transmission in the first TTI using the identified time and frequency resources for the PDSCH.

9. The apparatus of claim 8 , further comprising:

means for transmitting the configuration information for the control channel search space set using radio resource control signaling.

10. The apparatus of claim 8 , further comprising:

means for transmitting, in a field of a downlink control information (DCI), a transmission configuration indication (TCI) state, wherein the TCI state comprises a spatial quasi-collocation (QCL) parameter for a beam indication.

11. The apparatus of claim 8 , further comprising:

means for transmitting the PDSCH transmission in the first TTI using a beam corresponding to the identified time and frequency resources based at least in part on a scheduling offset of the PDSCH transmission being greater than or equal to a threshold value.

12. The apparatus of claim 8 , further comprising:

means for transmitting the PDSCH transmission in the first TTI using a first beam based at least in part on a scheduling offset of the PDSCH transmission being less than or equal to a threshold value, the first beam different from a second beam corresponding to the identified time and frequency resources.

13. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

identify time and frequency resources for a physical downlink shared channel (PDSCH) to be transmitted to a user equipment (UE) in a first transmission time interval (TTI);

transmit, to the UE, configuration information for a control channel search space set in a second TTI, the second TTI preceding the first TTI, and the configuration information comprising an indication of an absence of a physical downlink control channel (PDCCH) transmission to be sent in the control channel search space set to indicate the identified time and frequency resources for the PDSCH, and a set of time and frequency resources for the control channel search space set; and

transmit a PDSCH transmission in the first TTI using the identified time and frequency resources for the PDSCH.

14. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit the configuration information for the control channel search space set using radio resource control signaling.

15. The apparatus of claim 13 , wherein the configuration information comprises a control resource set configuration, a transmission configuration indication (TCI) state, and the time and frequency resources corresponding to resources of the control resource set configuration.

16. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit, in a field of a downlink control information (DCI), a transmission configuration indication (TCI) state, wherein the TCI state comprises a spatial quasi-collocation (QCL) parameter for a beam indication.

17. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit, in a field of a downlink control information (DCI), a transmission configuration indication (TCI) state; and

transmit, based at least in part on a scheduling offset of the PDSCH transmission being greater than or equal to a threshold value, the PDSCH transmission in the identified time and frequency resources using a beam associated with the transmitted TCI state.

18. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit, in a field of a downlink control information (DCI), a first transmission configuration indication (TCI) state; and

transmit, based at least in part on a scheduling offset of the PDSCH transmission being less than or equal to a threshold value, the PDSCH transmission in the identified time and frequency resources using a first beam associated with a second TCI state, the first beam different from a second beam associated with the first TCI state, and the second TCI state of a control resource set associated with the control channel search space set.

19. The apparatus of claim 13 , wherein the control channel search space set associated with a control resource set comprises a zero number of PDCCH candidates.

20. A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

identify time and frequency resources for a physical downlink shared channel (PDSCH) to be transmitted to a user equipment (UE) in a first transmission time interval (TTI);

transmit, to the UE, configuration information for a control channel search space set in a second TTI, the second TTI preceding the first TTI, and the configuration information comprising an indication of an absence of a physical downlink control channel (PDCCH) transmission to be sent in the control channel search space set to indicate the identified time and frequency resources for the PDSCH, and a set of time and frequency resources for the control channel search space set; and

transmit a PDSCH transmission in the first TTI using the identified time and frequency resources for the PDSCH.

21. The non-transitory computer-readable medium of claim 20 , wherein the instructions are further executable to:

transmit the configuration information for the control channel search space set using radio resource control signaling.

22. The non-transitory computer-readable medium of claim 20 , wherein the configuration information comprises a control resource set configuration, a transmission configuration indication (TCI) state, and the time and frequency resources corresponding to resources of the control resource set configuration.

23. The non-transitory computer-readable medium of claim 20 , wherein the instructions are further executable to:

transmit, in a field of a downlink control information (DCI), a transmission configuration indication (TCI) state, wherein the TCI state comprises a spatial quasi-collocation (QCL) parameter for a beam indication.

24. The non-transitory computer-readable medium of claim 20 , wherein the instructions are further executable to:

transmit, in a field of a downlink control information (DCI), a transmission configuration indication (TCI) state; and

transmit, based at least in part on a scheduling offset of the PDSCH transmission being greater than or equal to a threshold value, the PDSCH transmission in the identified time and frequency resources using a beam associated with the transmitted TCI state.

25. The non-transitory computer-readable medium of claim 20 , wherein the instructions are further executable to:

transmit, in a field of a downlink control information (DCI), a first transmission configuration indication (TCI) state; and

transmit, based at least in part on a scheduling offset of the PDSCH transmission being less than or equal to a threshold value, the PDSCH transmission in the identified time and frequency resources using a first beam associated with a second TCI state, the first beam different from a second beam associated with the first TCI state, and the second TCI state of a control resource set associated with the control channel search space set.

26. The non-transitory computer-readable medium of claim 20 , wherein the control channel search space set associated with a control resource set comprises a zero number of PDCCH candidates.