Method and apparatus for reporting channel state information in wireless communication systems
A method performed by a terminal in a wireless communication system includes: receiving, from a base station, configuration information associated with a channel state information (CSI) report including at least one information associated with a CSI resource setting; receiving, from the base station, information associated with channel occupancy duration; determining whether at least one symbol for receiving a channel state information reference signal (CSI-RS) is within channel occupancy duration, based on the at least one information associated with the CSI resource setting and the received information associated with the channel occupancy duration; receiving, from the base station, at least one CSI-RS on the at least one symbol, based on a result of the determining; and when the CSI report is determined to be transmitted, transmitting; to the base station, the CSI report based on the configuration information associated with the CSI report and the received at least one CSI-RS.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station (BS), channel state information (CSI) resource configuration information, CSI report configuration information, and information associated with channel occupancy duration;
performing a channel state information Reference Signal (CSI-RS) reception based on the CSI report configuration information;
identifying whether a downlink resource for the CSI-RS reception is valid or not based on the information associated with the channel occupancy duration;
in case that the downlink resource for the CSI-RS reception is not valid, cancelling the CSI-RS reception within the downlink resource; and
in case that the downlink resource for the CSI-RS reception is valid, receiving a CSI-RS for transmitting a CSI report, and transmitting, to the base station, the CSI report based on the received CSI-RS.
2. The method of claim 1 ,
wherein the downlink resource for the CSI-RS reception is not valid in case that the downlink resource for the CSI-RS reception is not within a channel occupancy duration.
3. The method of claim 1 , further comprising:
receiving, from the BS, slot format indication information,
wherein a valid downlink resource for the CSI-RS reception includes a downlink symbol or a flexible symbol indicated by the slot format indication information.
4. The method of claim 1 ,
wherein slot format indication information associated with the downlink resource is not provided to the terminal.
5. The method of claim 1 , further comprising:
determining a CSI processing unit (CPU) occupation time regardless of the channel occupancy duration,
wherein the CSI report is transmitted based on the determined CPU occupation time.
6. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, channel state information (CSI) resource configuration information for configuring the terminal to perform a channel state information Reference Signal (CSI-RS) reception, CSI report configuration information, and information associated with channel occupancy duration;
transmitting, to the terminal, one or more channel state information reference signals (CSI-RSs) based on the CSI report configuration information; and
receiving, from the terminal, a CSI report based on at least one valid CSI-RS from the one OF more CSI-RSs,
wherein the at least one valid CSI-RS is determined based on the information associated with the channel occupancy duration.
7. The method of claim 6 ,
wherein a CSI-RS is not valid in case that a downlink resource for the CSI-RS reception is not within a channel occupancy duration.
8. The method of claim 6 , further comprising:
transmitting, to the terminal, slot format indication information,
wherein at least one downlink resource for the at least one valid CSI-RS includes a downlink symbol or a flexible symbol indicated by the slot format indication information.
9. The method of claim 6 ,
wherein slot format indication information associated with a downlink resource for the one or more CSI-RSs is not provided to the terminal.
10. The method of claim 6 ,
wherein a CSI processing unit (CPU) occupation time is determined regardless of the channel occupancy duration by the terminal; and
wherein the CSI report is transmitted based on the determined CPU occupation time.
11. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
receive, from a base station (BS), channel state information (CSI) resource configuration information, CSI report configuration information, and information associated with channel occupancy duration,
perform a channel state information Reference Signal (CSI-RS) reception based on the CSI report configuration information,
identify whether a downlink resource for a CSI-RS is valid or not based on the information associated with the channel occupancy duration,
in case that the downlink resource for the CSI-RS reception is not valid, cancel the CSI-RS reception within the downlink resource, and
in case that the downlink resource for the CSI-RS reception is valid, receiving a CSI-RS for transmitting a CSI report, and transmitting, to the base station, the CSI report based on the received CSI-RS.
12. The terminal of claim 11 ,
wherein the downlink resource for the CSI-RS reception is not valid in case that the downlink resource for the CSI-RS reception is not within a channel occupancy duration.
13. The terminal of claim 11 , wherein the at least one processor is further configured to:
receive, from the BS, slot format indication information,
wherein a valid downlink resource for the CSI-RS reception includes a downlink symbol or a flexible symbol indicated by the slot format indication information.
14. The terminal of claim 11 ,
wherein slot format indication information associated with the downlink resource is not provided to the terminal.
15. The terminal of claim 11 , wherein the at least one processor is further configured to:
determine a CSI processing unit (CPU) occupation time regardless of the channel occupancy duration,
wherein the CSI report is transmitted based on the determined CPU occupation time.
16. A base station (BS) in a wireless communication system, the base station comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
transmit, to a terminal, channel state information (CSI) resource configuration information for configuring the terminal to perform a channel state information Reference Signal (CSI-RS) reception, CSI report configuration information, and information associated with channel occupancy duration,
transmit, to the terminal, one or more channel state information reference signals (CSI-RSs) based on the CSI report configuration information, and
receive, from the terminal, a CSI report based on at least one valid CSI-RS from the one or more CSI-RSs,
wherein the at least one valid CSI-RS is determined based on the information associated with the channel occupancy duration.
17. The BS of claim 16 ,
wherein a CSI-RS is not valid in case that a downlink resource for the CSI-RS reception is not within a channel occupancy duration.
18. The BS of claim 16 , wherein the at least one processor is further configured to:
transmit, to the terminal, slot format indication information,
wherein at least one downlink resource for the at least one valid CSI-RS includes a downlink symbol or a flexible symbol indicated by the slot format indication information.
19. The BS of claim 16 ,
wherein slot format indication information associated with a downlink resource for the one OF more CSI-RSs is not provided to the terminal.
20. The BS of claim 16 ,
wherein a CSI processing unit (CPU) occupation time is determined regardless of the channel occupancy duration by the terminal; and
wherein the CSI report is transmitted based on the determined CPU occupation time.