Operation method of user equipment in relation to CSI-RS in wireless communication system and apparatus supporting the same
The present invention provides an operation method of an user equipment in relation to CSI-RS in a wireless communication system. Particularly, an operation method performed by a user equipment (UE) according to the present disclosure includes receiving a higher layer signaling including resource configuration information related to an aperiodic transmission of beamformed CSI-RS from a base station (BS); receiving a first DCI format including first control information indicating that there is an aperiodic transmission of the beamformed CSI-RS from the BS; measuring the beamformed CSI-RS based on the received resource configuration information; and reporting a measurement result of the beamformed CSI-RS to the BS.
1. A method for receiving, by a user equipment (UE), data on a physical downlink shared channel (PDSCH) in a wireless communication system, the method comprising:
receiving, from a base station (BS), a higher layer signal including configuration information for aperiodic zero-power (ZP) channel state information-reference signal (CSI-RS) resources;
receiving, from the BS, downlink control information (DCI) including an aperiodic ZP CSI-RS indication field comprised of 2 bits;
determining a specific aperiodic ZP CSI-RS resource among the ZP CSI-RS resources based on (i) the configuration information and (ii) the aperiodic ZP CSI-RS indication field;
determining the PDSCH resource element mapping based on the specific aperiodic ZP CSI-RS resource; and
receiving, from the BS, the data on the PDSCH based on the determined PDSCH resource element mapping.
2. The method of claim 1 ,
wherein the configuration information for the aperiodic ZP CSI-RS resources includes 4 states related to determining the PDSCH resource element mapping.
3. The method of claim 2 ,
wherein the 2 bit of the aperiodic ZP CSI-RS indication field is configured to one of 00, 01, 10 and 11, and
wherein each of 00, 01, 10 and 11 is mapped to one of the 4 states included in the configuration information for the aperiodic ZP CSI-RS resources.
4. The method of claim 2 ,
wherein the DCI further includes a dynamic ZP CSI-RS indication field, and
wherein the dynamic ZP CSI-RS indication field includes a resource region that is available to be used for PDSCH transmission additionally based on aperiodic transmission of a CSI-RS not occurring.
5. The method of claim 2 , wherein the DCI further includes a PDSCH resource element mapping and quasi-co-location indicator (PQI) field.
6. The method of claim 5 , wherein the PDSCH resource element mapping is performed based on the PQI field.
7. The method of claim 1 , wherein the DCI is DCI related to a transmission mode (TM) which is defined for supporting a transmission of a CSI-RS.
8. The method of claim 1 , wherein the DCI is a DCI format type 2D.
9. A user equipment (UE) for receiving data on a physical downlink shared channel (PDSCH) in a wireless communication system, comprising:
a transmitter and receiver for transmitting and receiving a radio signal; and
a processor functionally connected to the transmitter and receiver, wherein the processor is configured to:
receive, from a base station (BS), a higher layer signal including configuration information for aperiodic zero-power (ZP) channel state information-reference signal (CSI-RS) resources;
receive, from the BS, downlink control information (DCI) including an aperiodic ZP CSI-RS indication field comprised of 2 bits;
determine a specific aperiodic ZP CSI-RS resource among the ZP CSI-RS resources based on (i) the configuration information and (ii) the aperiodic ZP CSI-RS indication field;
determine the PDSCH resource element mapping based on the specific aperiodic ZP CSI-RS resource; and
receive, from the BS, the data on the PDSCH based on the determined PDSCH resource element mapping.
10. The UE of claim 9 ,
wherein the configuration information for the aperiodic ZP CSI-RS resources includes 4 states related to determining the PDSCH resource element mapping.
11. The UE of claim 10 ,
wherein the 2 bit of the aperiodic ZP CSI-RS indication field is configured to one of 00, 01, 10 and 11, and
wherein each of the 00, 01, 10 and 11 is mapped to one of the 4 states included in the configuration information for the aperiodic ZP CSI-RS resources.
12. The UE of claim 10 ,
wherein the DCI further includes a dynamic ZP CSI-RS indication field, and
wherein the dynamic ZP CSI-RS indication field includes a resource region that is available to be used for PDSCH transmission additionally based on that aperiodic transmission of a CSI-RS does not occur.
13. The UE of claim 10 , wherein the DCI further includes a PDSCH resource element mapping and quasi-co-location indicator (PQI) field.
14. The UE of claim 13 , wherein the PDSCH resource element mapping is performed based on the PQI field.
15. The UE of claim 9 , wherein the DCI is DCI related to a transmission mode (TM) which is defined for supporting a transmission of a CSI-RS.
16. The UE of claim 9 , wherein the DCI is a DCI format type 2D.