Method and apparatus for reporting channel state information for network cooperative communication
A communication scheme and a system thereof for converging internet of things (IoT) technology and a 5 th generation (5G) communication system for supporting a higher data transmission rate beyond that of a 4 th generation (4G) system are provided. The disclosure can be applied to intelligent services (for example, services related to smart homes, smart buildings, smart cities, smart cars, connected cars, health care, digital education, retail business, security, and safety) based on the 5G communication technology and the IoT-related technology. The disclosure proposes a method and an apparatus for transmitting and receiving a reference signal to efficiently use resources in a wireless communication system.
1. A method performed by a terminal in a communication system, the method comprising:
receiving, from a base station, information including a channel measurement resource (CMR) configuration for first channel state information (CSI) and a non-zero power based interference measurement resource (NZP-IMR) configuration for the first CSI, wherein the CMR configuration for the first CSI indicates a first resource as CMR for the first CSI and the NZP-IMR configuration for the first CSI indicates a second resource as NZP-IMR for the first CSI;
identifying a first antenna port for a channel measurement for the first CSI;
identifying a second antenna port for an interference measurement for the first CSI;
acquiring the first CSI based on the channel measurement using the first resource of the first antenna port and the interference measurement using the second resource of the second antenna port; and
transmitting the first CSI to the base station,
wherein the first resource is used as NZP-IMR for second CSI based on a CMR configuration for the second CSI, and the second resource is used as CMR for the second CSI based on a NZP-IMR configuration for the second CSI,
wherein the information indicates a link between the NZP-IMR configuration for the first CSI and the CMR configuration for the second CSI, and
wherein the second antenna port for the interference measurement for the first CSI is identified based on a rank indicator (RI) associated with the CMR for the second CSI.
2. The method of claim 1 , wherein the second antenna port is identified based on an indication using bitmap received from the base station.
3. The method of claim 1 , wherein the second antenna port is identified based on a restriction on number of interference layer and corresponding antenna port for the number of interference layer.
4. The method of claim 1 , wherein the second antenna port is identified based on a rank restriction and corresponding antenna port.
5. The method of claim 1 , wherein the second antenna port is identified based on an antenna port corresponding to the RI.
6. A method performed by a base station in a communication system, the method comprising:
transmitting, to a terminal, information including a channel measurement resource (CMR) configuration for first channel state information (CSI) and a non-zero power based interference measurement resource (NZP-IMR) configuration for the first CSL wherein the CMR configuration for the first CSI indicates a first resource as CMR for the first CSI and the NZP-IMR configuration for the first CSI indicates a second resource as NZP-IMR for the first CSI;
identifying a first antenna port for a channel measurement for the first CSI;
identifying a second antenna port for an interference measurement for the first CSI; and
receiving, from the terminal, the first CSI depending on the channel measurement using the first resource of the first antenna port and the interference measurement using the second resource of the second antenna port,
wherein the first resource is used as NZP-IMR for second CSI based on a CMR configuration for the second CSI, and the second resource is used as CMR for the second CSI based on a NZP-IMR configuration for the second CSI,
wherein the information indicates a link between the NZP-IMR configuration for the first CSI and the CMR configuration for the second CSI, and
wherein the second antenna port for the interference measurement for the first CSI is identified based on a rank indicator (RI) associated with the CMR for the second CSI.
7. The method of claim 6 , wherein the second antenna port is identified based on an indication using bitmap received from the base station.
8. The method of claim 6 , wherein the second antenna port is identified based on a restriction on number of interference layer and corresponding antenna port for the number of interference layer.
9. The method of claim 6 , wherein the second antenna port is identified based on a rank restriction and corresponding antenna port.
10. The method of claim 6 , wherein the second antenna port is identified based on an antenna port corresponding to the RI.
11. A terminal in a communication system, the terminal comprising:
a transceiver; and
at least one processor configured to:
receive, from a base station, information including a channel measurement resource (CMR) configuration for first channel state information (CSI) and a non-zero power based interference measurement resource (NZP-IMR) configuration for the first CSI, wherein the CMR configuration for the first CSI indicates a first resource as CMR for the first CSI and the NZP-IMR configuration for the first CSI indicates a second resource as NZP-IMR for the first CSI,
identify a first antenna port for a channel measurement for the first CSI,
identify a second antenna port for an interference measurement for the first CSI,
acquire the first CSI based on the channel measurement using the first resource of the first antenna port and the interference measurement using the second resource of the second antenna port, and
transmit the first CSI to the base station,
wherein the first resource is used as NZP-IMR for second CSI based on a CMR configuration for the second CSI, and the second resource is used as CMR for the second CSI based on a NZP-IMR configuration for the second CSI,
wherein the information indicates a link between the NZP-IMR configuration for the first CSI and the CMR configuration for the second CSI, and
wherein the second antenna port for the interference measurement for the first CSI is identified based on a rank indicator (RI) associated with the CMR for the second CSI.
12. The terminal of claim 11 , wherein the second antenna port is identified based on an indication using bitmap received from the base station.
13. The terminal of claim 11 , wherein the second antenna port is identified based on a restriction on number of interference layer and corresponding antenna port for the number of interference layer.
14. A base station in a communication system, the base station comprising:
a transceiver; and
at least one processor configured to:
transmit, to a terminal, information including a channel measurement resource (CMR) configuration for first channel state information (CSI) and a non-zero power based interference measurement resource (NZP-IMR) configuration for the first CSI, wherein the CMR configuration for the first CSI indicates a first resource as CMR for the first CSI and the NZP-IMR configuration for the first CSI indicates a second resource as NZP-IMR for the first CSI,
identify a first antenna port for a channel measurement for the first CSI,
identify a second antenna port for an interference measurement for the first CSI, and
receive, from the terminal, the first CSI depending on the channel measurement using the first resource of the first antenna port and the interference measurement using the second resource of the second antenna port,
wherein the first resource is used as NZP-IMR for second CSI based on a CMR configuration for the second CSI, and the second resource is used as CMR for the second CSI based on a NZP-IMR configuration for the second CSI,
wherein the information indicates a link between the NZP-IMR configuration for the first CSI and the CMR configuration for the second CSI, and
wherein the second antenna port for the interference measurement for the first CSI is identified based on a rank indicator (RI) associated with the CMR for the second CSI.
15. The base station of claim 14 , wherein the second antenna port is identified based on an indication using bitmap received from the base station.
16. The base station of claim 14 wherein the second antenna port is identified based on a restriction on number of interference layer and corresponding antenna port for the number of interference layer.