CSI-RS inter-intra frequency measurements

1 . An apparatus for wireless communication at a user equipment (UE), comprising:

at least one memory; and

at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor is configured to:

receive, from a serving cell, a configuration to perform an inter-frequency measurement of at least one of a synchronization signal block (SSB) or a channel state information (CSI) reference signal (RS) (CSI-RS) of a candidate cell while connected to the serving cell;

perform, for the candidate cell, the inter-frequency measurement on the at least one of the SSB or the CSI-RS from the candidate cell based on the received configuration; and

output an indication of the performed inter-frequency measurement.

2 . The apparatus of claim 1 , wherein the configuration is an RS information element (IE) for the serving cell.

3 . The apparatus of claim 1 , wherein the at least one processor is further configured to:

receive a transmission configuration indicator (TCI) configuration from the serving cell, wherein the TCI configuration is a TCI information element (IE) for the serving cell, the TCI configuration being for the CSI-RS from the candidate cell, wherein to perform the inter-frequency measurement, the at least one processor is configured to perform the inter-frequency measurement further based on the received TCI configuration for the CSI-RS.

4 . The apparatus of claim 1 , wherein the configuration is an RS information element (IE) for the candidate cell.

5 . The apparatus of claim 1 , wherein the at least one processor is further configured to:

receive a transmission configuration indicator (TCI) configuration from the serving cell, wherein the TCI configuration is a TCI information element (IE) for the candidate cell, the TCI configuration being for the CSI-RS from the candidate cell, wherein to perform the inter-frequency measurement, the at least one processor is configured to perform the inter-frequency measurement further based on the received TCI configuration for the CSI-RS.

6 . The apparatus of claim 5 , wherein the at least one processor is further configured to:

activate a TCI state associated with the received TCI configuration before a switch to the candidate cell to perform the inter-frequency measurement on the CSI-RS from the candidate cell.

7 . The apparatus of claim 1 , wherein the inter-frequency measurement for the CSI-RS is associated with one of beam tracking, beam management, UE mobility, or an interference measurement.

8 . The apparatus of claim 1 , wherein the at least one processor is further configured to:

receive at least one of layer 1 (L1) signaling or layer 2 (L2) signaling that is configured to trigger a cell switch to at least the candidate cell; and

switch from the serving cell to at least the candidate cell after an activation time to perform the inter-frequency measurement, the activation time being based on whether one or more configuration parameters associated with the candidate cell are identical to one or more configuration parameters associated with the serving cell.

9 . The apparatus of claim 8 , wherein the at least one processor is further configured to:

transmit, to the serving cell, information associated with the activation time at the UE due to a change of the one or more configuration parameters from the serving cell to the candidate cell.

10 . The apparatus of claim 8 , wherein the at least one processor is further configured to:

receive information from the serving cell that indicates that the UE is to prepare for a handover to the candidate cell to perform the inter-frequency measurement, wherein the at least one processor is configured to switch from the serving cell to at least the candidate cell based on the received information.

11 . The apparatus of claim 1 , wherein to perform the inter-frequency measurement, the at least one processor is configured to perform the inter-frequency measurement without utilization of a transmission configuration indicator (TCI) configuration.

12 . The apparatus of claim 11 , wherein to perform the inter-frequency measurement, the at least one processor is configured to perform the inter-frequency measurement based on a beam sweep at the candidate cell.

13 . The apparatus of claim 1 , wherein to perform the inter-frequency measurement, the at least one processor is configured to perform the inter-frequency measurement based on a default transmission configuration indicator (TCI) state in the candidate cell.

14 . The apparatus of claim 1 , further comprising: at least one of a transceiver or an antenna coupled to the at least one processor, wherein to receive the configuration, the at least one processor is configured to receive the configuration via at least one of the transceiver or the antenna.

15 . A method of wireless communication at a user equipment (UE), comprising:

receiving, from a serving cell, a configuration to perform an inter-frequency measurement of at least one of a synchronization signal block (SSB) or a channel state information (CSI) reference signal (RS) (CSI-RS) of a candidate cell while connected to the serving cell;

performing, for the candidate cell, the inter-frequency measurement on the at least one of the SSB or the CSI-RS from the candidate cell based on the received configuration; and

outputting an indication of the performed inter-frequency measurement.

16 . The method of claim 15 , wherein the configuration is a RS information element (IE) for the serving cell.

17 . The method of claim 15 , further comprising:

receiving a transmission configuration indicator (TCI) configuration from the serving cell, wherein the TCI configuration is a TCI information element (IE) for the serving cell, the TCI configuration being for the CSI-RS from the candidate cell, wherein the inter-frequency measurement is performed further based on the received TCI configuration for the CSI-RS.

18 . The method of claim 15 , wherein the configuration is a RS information element (IE) for the candidate cell.

19 . The method of claim 15 , further comprising:

receiving a transmission configuration indicator (TCI) configuration from the serving cell, wherein the TCI configuration is a TCI information element (IE) for the candidate cell, the TCI configuration being for the CSI-RS from the candidate cell, wherein the inter-frequency measurement is performed further based on the received TCI configuration for the CSI-RS.

20 . The method of claim 19 , further comprising:

activating a TCI state associated with the received TCI configuration before switching to the candidate cell to perform the inter-frequency measurement on the CSI-RS from the candidate cell.

21 . The method of claim 15 , wherein the inter-frequency measurement for the CSI-RS is associated with one of beam tracking, beam management, UE mobility, or an interference measurement.

22 . The method of claim 15 , further comprising:

receiving at least one of layer 1 (L1) signaling or layer 2 (L2) signaling triggering a cell switch to at least the candidate cell; and

switching from the serving cell to at least the candidate cell after an activation time to perform the inter-frequency measurement, the activation time being based on whether one or more configuration parameters associated with the candidate cell are identical to one or more configuration parameters associated with the serving cell.

23 . The method of claim 22 , further comprising:

transmitting, to the serving cell, information associated with the activation time at the UE due to changing the one or more configuration parameters from the serving cell to the candidate cell.

24 . The method of claim 22 , further comprising:

receiving information from the serving cell indicating for the UE to prepare for a handover to the candidate cell for performing the inter-frequency measurement, wherein the switching from the serving cell to at least the candidate cell is performed based on the received information.

25 . An apparatus for wireless communication at a user equipment (UE), comprising:

means for receiving, from a serving cell, a configuration to perform an inter-frequency measurement of at least one of a synchronization signal block (SSB) or a channel state information (CSI) reference signal (RS) (CSI-RS) of a candidate cell while connected to the serving cell;

means for performing, for the candidate cell, the inter-frequency measurement on the at least one of the SSB or the CSI-RS from the candidate cell based on the received configuration; and

means for outputting an indication of the performed inter-frequency measurement.

26 . A non-transitory computer-readable medium storing computer executable code at a user equipment (UE), the computer executable code, when executed by at least one processor, causes the at least one processor to:

receive, from a serving cell, a configuration to perform an inter-frequency measurement of at least one of a synchronization signal block (SSB) or a channel state information (CSI) reference signal (RS) (CSI-RS) of a candidate cell while connected to the serving cell;

perform, for the candidate cell, the inter-frequency measurement on the at least one of the SSB or the CSI-RS from the candidate cell based on the received configuration; and

output an indication of the performed inter-frequency measurement.