Channel state information transmission/reception method and apparatus for use in wireless communication system
A method and an apparatus for transmitting/receiving channel state information for use in multi-antenna system are provided. A signal communication method of a base station having a plurality of antennas in a wireless communication system includes determining antenna ports of first and second directions based on directions of the plurality of antennas, allocating channel measurement resources for the respective antenna ports to a terminal, transmitting a feedback configuration to the terminal according to the channel measurement resources, and receiving feedback information from the terminal based on the channel measurement resource and the feedback configuration. The signal transmission/reception method and apparatus are advantageous in transmitting/receiving channel state information efficiently in the system using a plurality of antennas.
1. A signal communication method of a base station in a wireless communication system, the method comprising:
identifying a first antenna port set and a second antenna port set;
transmitting, to a terminal, at least one reference signal for the terminal;
transmitting, to the terminal, feedback configuration information comprising a value of rank indicator (RI) for the first antenna port set; and
receiving, from the terminal, feedback information based on the at least one reference signal and the feedback configuration information,
wherein the feedback information includes a value of RI for the second antenna port set identified based on the at least one reference signal and the value of RI for the first antenna port set.
2. The method of claim 1 , wherein the transmitting of the at least one reference signal comprises transmitting, to the terminal, the at least one reference signal via at least one antenna related to the first antenna port set or via at least one antenna related to the second antenna port set.
3. The method of claim 1 , further comprising:
transmitting, to the terminal, at least one of a cell ID and a transmission power related to the first antenna port set and the second antenna port set.
4. The method of claim 1 , wherein the feedback information is generated based on the at least one reference signal transmitted via at least one of the first antenna port set and the second antenna port set.
5. The method of claim 1 , further comprising:
receiving, from the terminal, at least one of information on a precoding related to the first antenna port set and information on a precoding related to the second antenna port set based on the at least one reference signal.
6. A signal communication method of a terminal in a wireless communication system, the method comprising:
receiving, from a base station, at least one reference signal related to at least one of a first antenna port set and a second antenna port set;
receiving, from the base station, feedback configuration information comprising a value of rank indicator (RI) for the first antenna port set; and
transmitting, to the base station, feedback information based on the at least one reference signal and the feedback configuration information,
wherein the feedback information includes a value of RI for the second antenna port set identified based on the at least one reference signal and the value of RI for the first antenna port set.
7. The method of claim 6 , wherein the receiving of the at least one reference signal comprises receiving, from the base station, the at least one reference signal via at least one antenna related to the first antenna port set or via at least one antenna related to the second antenna port set.
8. The method of claim 6 , further comprising:
receiving, from the base station, at least one of a cell ID and a transmission power related to at least one of the first antenna port set and the second antenna port set.
9. The method of claim 6 , wherein the feedback information is generated based on the at least one reference signal transmitted via at least one of the first antenna port set and the second antenna port set.
10. The method of claim 6 , further comprising:
transmitting, to the base station, at least one of information on a precoding related to the first antenna port set and information on a precoding related to the second antenna port set based on the at least one reference signal.
11. A base station of a wireless communication system, the base station comprising:
a transceiver configured to transmit and receive a signal; and
at least one processor configured to:
identify a first antenna port set and a second antenna port set,
transmit, to a terminal, at least one reference signal for the terminal,
transmit, to the terminal, feedback configuration information comprising a value of rank indicator (RI) for the first antenna port set, and
receive, from the terminal, feedback information based on the at least one reference signal and the feedback configuration information,
wherein the feedback information includes a value of RI for the second antenna port set identified based on the at least one reference signal and the value of RI for the first antenna port set.
12. The base station of claim 11 , wherein the at least one processor is further configured to:
transmit, to the terminal, the at least one reference signal via at least one antenna related to the first antenna port set or via at least one antenna related to the second antenna port set.
13. The base station of claim 11 , wherein the at least one processor is further configured to:
transmit, to the terminal, at least one of a cell ID and a transmission power related to the first antenna port set and the second antenna port set.
14. The base station of claim 11 , wherein the feedback information is generated based on the at least one reference signal transmitted via at least one of the first antenna port set and the second antenna port set.
15. The base station of claim 11 , wherein the at least one processor is further configured to:
receive, from the terminal, at least one of information on a precoding related to the first antenna port set and information on a precoding related to the second antenna port set based on the at least one reference signal.
16. A terminal of a wireless communication system, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
at least one processor configured to:
receive, from a base station, at least one reference signal related to at least one of a first antenna port set and a second antenna port set,
receive, from the base station, feedback configuration information comprising a value of rank indicator (RI) for the first antenna port set, and
transmit, to the base station, feedback information based on the at least one reference signal and the feedback configuration information,
wherein the feedback information includes a value of RI for the second antenna port set identified based on the at least one reference signal and the value of RI for the first antenna port set.
17. The terminal of claim 16 , wherein the at least one processor is further configured to:
receive, from the base station, the at least one reference signal via at least one antenna related to the first antenna port set or via at least one antenna related to the second antenna port set.
18. The terminal of claim 16 , wherein the at least one processor is further configured to:
receive, from the base station, at least one of a cell ID and a transmission power related to at least one of the first antenna port set and the second antenna port set.
19. The terminal of claim 16 , wherein the feedback information is generated based on the at least one reference signal transmitted via at least one of the first antenna port set and the second antenna port set.
20. The terminal of claim 16 , wherein the at least one processor is further configured to:
transmit, to the base station, at least one of information on a precoding related to the first antenna port set and information on a precoding related to the second antenna port set based on the at least one reference signal.