Method for reporting channel state information by terminal in wireless communication system and device for supporting same
Disclosed are a method for reporting channel state information by a terminal and, a device for supporting the same. More particularly, disclosed are a method in which a base station transmits a signal using a plurality of analog beams, and a terminal calculates channel state information feedback and reports the channel state information to the base station, in response to the base station, and a device for supporting the same.
1. A method of transmitting channel state information (CSI) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station (BS), configuration information related to at least one CSI report, wherein the configuration information includes first information related to at least one CSI resource, and second information related to whether reception state information is included in the at least one CSI report;
receiving, from the BS, downlink control information (DCI) requesting at least one CSI report; and
transmitting, to the BS, at least one CSI report based on the first information and the second information,
wherein a CSI-reference signal (CSI-RS) resource index (CRI) is included in the at least one CSI report based on the reception state information—included in the CSI report,
wherein the reception state information includes reference signal reception power (RSRP).
2. The method of claim 1 , wherein based on a first number of CSI reports being requested by the DCI, a second number of CSI reports being transmitted, and the first number being greater than the second number, the second number of the CSI reports among the first number of CSI reports is updated based on a maximum CSI calculation capability of the UE.
3. The method of claim 2 , wherein priorities are assigned to the first number of CSI reports based on the maximum CSI calculation capability of the UE and a predetermined criterion, and the second number of CSI reports are transmitted based on the priorities.
4. The method of claim 1 , wherein the at least one CSI resource comprises at least one of at least one CSI-RS resource, or at least one channel state information-interference measurement (CSI-IM) resource.
5. A user equipment (UE) configured for transmitting channel state information (CSI) in a wireless communication system, the UE comprising:
a transmitter;
a receiver; and
at least one processor operatively coupled to the transmitter and the receiver, wherein the at least one processor is configured to:
receive, through the receiver, from a base station (BS), configuration information related to at least one CSI report, wherein the configuration information includes first information related to at least one CSI resource, and second information related to whether reception state information is included in the at least one CSI report;
receive, through the receiver, from the BS, downlink control information (DCI) requesting at least one CSI report; and
transmit, through the transmitter, to the BS, at least one CSI report based on the first information and the second information,
wherein a CSI-reference signal (CSI-RS) resource index (CRI) is included in the at least one CSI report based on the reception state information-included in the CSI report,
wherein the reception state information includes reference signal reception power (RSRP).
6. A method of receiving channel state information (CSI) by a base station (BS) in a wireless communication system, the method comprising:
transmitting, to a user equipment (UE), configuration information related to at least one CSI report, wherein the configuration information includes first information related to at least one CSI resource, and second information related to whether reception state information is included in the at least one CSI report;
transmitting, to the UE, downlink control information (DCI) requesting at least one CSI report; and
receiving, from the UE, at least one CSI report based on the first information and the second information,
wherein a CSI-reference signal (CSI-RS) resource index (CRI) is included in the at least one CSI report based on the reception state information—included in the CSI report,
wherein the reception state information includes reference signal reception power (RSRP).
7. A processing apparatus configured to control a user equipment (UE) to transmit channel state information (CSI) in a wireless communication system, the processing apparatus comprising:
at least one processor; and
at least one computer memory operably connected to the at least one processor and
storing instructions that, based on being executed by the at least one processor, perform operations comprising:
receiving, from a base station (BS), configuration information related to at least one CSI report, wherein the configuration information includes first information related to at least one CSI resource, and second information related to whether reception state information is included in the at least one CSI report;
receiving, from the BS, downlink control information (DCI) requesting at least one CSI report; and
transmitting, to the BS, at least one CSI report based on the first information and the second information,
wherein a CSI-reference signal (CSI-RS) resource index (CRI) is included in the at least one CSI report based on the reception state information included in the CSI report,
wherein the reception state information includes reference signal reception power (RSRP).