Systems and methods for resource-specific reference signal configuration
Networks use channel state information reference signals (CSI-RSs) to measure channel conditions between a user equipment (UE) and a transmit/receive point (TRP) in a cell. The resources configured for the transmission of a CSI-RS may be indicated to the UE using higher layer signaling. Measurement results for a CSI-RS are transmitted by the UE in the form of a measurement report. A need exists for signaling designs that aim to provide more flexible and efficient signaling of CSI-RS resource configurations and measurement reports. In some embodiments, CSI-RS resource configurations and measurement reports are resource-specific. The CSI-RS resource configurations may be independent from an identifier of the cell that the CSI-RS is transmitted from, and the measurement reports do not necessarily include the identifier of the cell. Advantages may include allowing the network to freely allocate CSI-RS resources without the need for reconfiguration at the UE side.
1. A method comprising:
receiving higher layer signaling indicating a configuration of resources for a channel state information reference signal (CSI-RS) for mobility to a first cell from a second cell within a network, wherein the resources are configured independent of an identifier of the first cell;
receiving the CSI-RS transmitted from at least one transmit/receive point (TRP) of the first cell; and
transmitting a measurement report including measurement results for the CSI-RS, wherein the measurement report does not include the identifier of the first cell.
2. The method of claim 1 , wherein, in the measurement report, the measurement results for the CSI-RS are identified by the configuration of resources for the CSI-RS.
3. The method of claim 1 , wherein the CSI-RS is a first CSI-RS, and the measurement report is a first measurement report, the method further comprising:
receiving a second CSI-RS transmitted from at least one TRP of the second cell, wherein resources for the second CSI-RS are also configured by the configuration of resources for the first CSI-RS; and
transmitting a second measurement report comprising measurement results for the second CSI-RS.
4. An apparatus comprising:
a receiver configured to:
receive higher layer signaling indicating a configuration of resources for a channel state information reference signal (CSI-RS) for mobility to a first cell from a second cell within a network, wherein the resources are configured independent of an identifier of the first cell, and
receive the CSI-RS transmitted from at least one transmit/receive point (TRP) of the first cell; and
a transmitter configured to transmit a measurement report including measurement results for the CSI-RS, wherein the measurement report does not include the identifier of the first cell.
5. The apparatus of claim 4 , wherein, in the measurement report, the measurement results for the CSI-RS are identified by the configuration of resources for the CSI-RS.
6. The apparatus of claim 4 , wherein the CSI-RS is a first CSI-RS, and the measurement report is a first measurement report,
wherein the receiver is further configured to receive a second CSI-RS transmitted from at least one TRP of the second cell, wherein resources for the second CSI-RS are also configured by the configuration of resources for the first CSI-RS; and
wherein the transmitter is further configured to transmit a second measurement report comprising measurement results for the second CSI-RS.
7. A method performed by a user equipment (UE), the method comprising:
receiving higher layer signaling indicating a first configuration of resources for a first associated synchronization signal block (SSB) transmitted from at least one transmit/receive point (TRP) of a cell;
transmitting signaling comprising feedback indicating that the first associated SSB was not detected by the UE; and
receiving further higher layer signaling indicating a second configuration of resources for a second associated SSB transmitted from the at least one TRP, the second configuration of resources being different from the first configuration of resources.
8. The method of claim 7 , wherein the signaling comprising the feedback is included in a measurement report.
9. The method of claim 8 , wherein the measurement report corresponds to an associated channel state information reference signal (CSI-RS) resource.
10. An apparatus comprising:
a receiver configured to receive higher layer signaling indicating a first configuration of resources for a first associated synchronization signal block (SSB) transmitted from at least one transmit/receive point (TRP) of a cell; and
a transmitter configured to transmit signaling comprising feedback, the feedback indicating that the first associated SSB was not detected when the apparatus does not detect the first associated SSB, wherein
the receiver is further configured to receive further higher layer signaling indicating a second configuration of resources for a second associated SSB transmitted from the at least one TRP, the second configuration of resources being different from the first configuration of resources.
11. The apparatus of claim 10 , wherein the signaling comprising the feedback is included in a measurement report.
12. The apparatus of claim 11 , wherein the measurement report corresponds to an associated channel state information reference signal (CSI-RS) resource.
13. The method of claim 1 , wherein the resources are configured independent of an identifier of the second cell.
14. The apparatus of claim 4 , wherein the resources are configured independent of an identifier of the second cell.