Method and apparatus for transmitting and receiving channel state information in wireless communication system
Disclosed are a method and apparatus for transmitting and receiving channel state information in a wireless communication system. The method for transmitting channel state information (CSI) according to an embodiment of the present disclosure, may comprise the steps of: receiving, from a base station, configuration information related to the CSI, wherein the configuration information includes information about a CSI-RS resource set; receiving a CSI-reference signal (CSI-RS) from the base station; and transmitting the CSI, to the base station, on the basis of the configuration information and the CSI-RS. The CSI-RS resource set may include M CSI-RS resource groups (M is a natural number), and the CSI may include N first CSI sets generated on the basis of a single CSI-RS resource in N mutually different CSI-RS resource groups (N≤M, N is a natural number) from among the M CSI-RS resource groups.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, configuration information related to channel state information (CSI) reporting;
receiving, from the base station, a CSI-reference signal (CSI-RS) on a CSI-RS resource set; and
transmitting, to the base station, the CSI generated using the CSI-RS,
wherein the CSI-RS resource set is configured with two resource groups and N (N is a natural number) resource pairs,
wherein each of the N resource pairs includes one resource of each of the two resource groups,
wherein each of the N resource pairs is associated with one CSI-RS resource indicator (CRI) value,
wherein the CSI includes i) one of N CRI values associated with the N resource pairs and ii) X (X is a natural number) CRI values other than the N CRI values based on the X being configured by the configuration information, and
wherein each of the X CRI values corresponds to a single resource of the CSI-RS resource set.
2. The method of claim 1 , wherein, when a report on the X CRI values and a report on the N CRI values collide, the report on the N CRI values is transmitted with priority.
3. The method of claim 1 , wherein, when a report on the X CRI values and a report on the N CRI values collide, the report on the X CRI values is transmitted with priority.
4. The method of claim 1 , wherein, when a report on the X CRI values and a report on the N CRI values collide, priority for transmission is determined by the configuration information.
5. The method of claim 3 , wherein a report on the X CRI values and L1 (layer 1)-SINR (signal to interference and noise ratio) or L1-RSRP (reference signal received power) is transmitted with priority over a report on the N CRI values without the L1-SINR and the L1-RSRP.
6. A terminal operating in a wireless communication system, the terminal comprising:
at least one transceiver for transmitting and receiving a wireless signal; and
at least one processor for controlling the at least one transceiver,
wherein the at least one processor configured to:
receive, from a base station, configuration information related to channel state information (CSI) reporting;
receive, from the base station, a CSI-reference signal (CSI-RS) on a CSI-RS resource set; and
transmit, to the base station, the CSI generated using the CSI-RS,
wherein the CSI-RS resource set is configured with two resource groups and N (N is a natural number) resource pairs,
wherein each of the N resource pairs includes one resource of each of the two resource groups,
wherein each of the N resource pairs is associated with one CSI-RS resource indicator (CRI) value,
wherein the CSI includes i) one of N CRI values associated with the N resource pairs and ii) X (X is a natural number) CRI values other than the N CRI values based on the X being configured by the configuration information, and
wherein each of the X CRI values corresponds to a single resource of the CSI-RS resource set.
7. The terminal of claim 6 , wherein, when a report on the X CRI values and a report on the N CRI values collide, the report on the N CRI values is transmitted with priority.
8. The terminal of claim 6 , wherein, when a report on the X CRI values and a report on the N CRI values collide, the report on the X CRI values is transmitted with priority.
9. The terminal of claim 6 , wherein, when a report on the X CRI values and a report on the N CRI values collide, priority for transmission is determined by the configuration information.
10. The base station operating in a wireless communication system, the base station comprising:
at least one transceiver for transmitting and receiving a wireless signal; and
at least one processor for controlling the at least one transceiver,
wherein the at least one processor configured to:
transmit, to a terminal, configuration information related to channel state information (CSI) reporting;
transmit, to the terminal, a CSI-reference signal (CSI-RS) on a CSI-RS resource set; and
receive, from the terminal, the CSI generated using the CSI-RS,
wherein the CSI-RS resource set is configured with N (N is a natural number) resource pairs,
wherein each of the N resource pairs includes one resource of each of the two resource groups,
wherein each of the N resource pairs is associated with one CSI-RS resource indicator (CRI) value,
wherein the CSI includes i) one of N CRI values associated with the N resource pairs and ii) X (X is a natural number) CRI values other than the N CRI values based on the X being configured by the configuration information, and
wherein each of the X CRI values corresponds to a single resource of the CSI-RS resource set.