Method and apparatus for reference signal for measurements
Methods and apparatuses for a reference signal for measurements. A method for operating a user equipment (UE), includes receiving, from a base station, a channel state information-reference signal (CSI-RS) trigger and an aperiodic CSI (A-CSI) request and decoding the CSI-RS trigger and the A-CSI request. The method includes measuring a CSI-RS associated with the CSI-RS trigger; and calculating, based on the measured CSI-RS, an A-CSI report associated with the A-CSI request. The method includes transmitting, to the base station, the A-CSI report. The CSI-RS includes two signal components for channel and interference measurement, respectively. Additional embodiments include base station and UE apparatuses and a method for operating a base station.
1. A user equipment (UE) comprising:
a transceiver configured to receive, from a base station, a channel state information-reference signal (CSI-RS) trigger and an aperiodic CSI (A-CSI) request; and
a processor operably connected to the transceiver, the processor configured to:
decode the CSI-RS trigger and the A-CSI request;
measure a CSI-RS associated with the CSI-RS trigger; and
calculate, based on the measured CSI-RS, an A-CSI report associated with the A-CSI request,
wherein the transceiver is further configured to transmit, to the base station, the A-CSI report,
wherein the CSI-RS includes two signal components for channel and interference measurement, respectively, and
wherein the CSI-RS trigger includes at least three hypotheses.
2. The UE of claim 1 , wherein the CSI-RS measurement and the A-CSI report are triggered jointly.
3. The UE of claim 1 , wherein the three hypotheses are to measure one instance of the CSI-RS, to activate the CSI-RS, and to deactivate the CSI-RS.
4. The UE of claim 1 , wherein:
the hypotheses correspond to different CSI-RS instances, and
the processor is configured to:
measure at least a first of the CSI-RS instances,
activate at least a second of the CSI-RS instances, and
deactivate at least a third of the CSI-RS instances.
5. The UE of claim 1 , wherein the A-CSI request includes at least three hypotheses.
6. The UE of claim 5 , wherein the three hypotheses for the A-CSI request are to report one instance of an A-CSI, to activate the A-CSI, and to deactivate the A-CSI.
7. A base station (BS) comprising:
a processor configured to generate a channel state information-reference signal (CSI-RS) trigger and an aperiodic CSI (A-CSI) request; and
a transceiver operably connected to the processor, the transceiver configured to:
transmit, to a user equipment (UE), the CSI-RS trigger and the A-CSI request; and
receive, from the UE, an A-CSI report associated with the A-CSI request calculated based on measurement of a CSI-RS associated with the CSI-RS trigger,
wherein the CSI-RS includes two signal components for channel and interference measurement, respectively, and
wherein the CSI-RS trigger includes at least three hypotheses.
8. The BS of claim 7 , wherein:
the A-CSI request includes at least three hypotheses, and
the three of the hypotheses for the A-CSI request are to report one instance of an A-CSI, to activate the A-CSI, and to deactivate the A-CSI.
9. The BS of claim 8 , wherein the CSI-RS measurement and the A-CSI report are triggered jointly.
10. The BS of claim 7 , wherein the three of the hypotheses are to measure one instance of the CSI-RS, to activate the CSI-RS, and to deactivate the CSI-RS.
11. The BS of claim 7 , wherein the hypotheses correspond to different CSI-RS instances for measurement of at least a first of the CSI-RS instances, activation of at least a second of the CSI-RS instances, and deactivation of at least a third of the CSI-RS instances.
12. A method for operating a user equipment (UE), the method comprising:
receiving, from a base station, a channel state information-reference signal (CSI-RS) trigger and an aperiodic CSI (A-CSI) request;
decoding the CSI-RS trigger and the A-CSI request;
measuring a CSI-RS associated with the CSI-RS trigger;
calculating, based on the measured CSI-RS, an A-CSI report associated with the A-CSI request; and
transmitting, to the base station, the A-CSI report,
wherein the CSI-RS includes two signal components for channel and interference measurement, respectively, and
wherein the CSI-RS trigger includes at least three hypotheses.
13. The method of claim 12 , wherein the A-CSI request includes at least three hypotheses.
14. The method of claim 13 , wherein the three of the hypotheses for the A-CSI request are to report one instance of A-CSI, to activate the A-CSI, and to deactivate the A-CSI.
15. The method of claim 14 , wherein the CSI-RS measurement and the A-CSI report are triggered jointly.
16. The method of claim 12 , wherein the three of the hypotheses are to measure one instance of the CSI-RS, to activate the CSI-RS, and to deactivate the CSI-RS.
17. The method of claim 12 , wherein the hypotheses correspond to different CSI-RS instances, and the method further comprises:
measuring at least a first of the CSI-RS instances;
activating at least a second of the CSI-RS instances; and
deactivating at least a third of the CSI-RS instances.