Method for expansively transmitting channel estimation reference signal and method and device for transmitting and receiving channel estimation reference signal using same

1. A method of transmitting control information for expansive transmission of a channel estimation reference signal, the method comprising:

determining, by a base station, a first user equipment, which was set to transmit a channel estimation reference signal in a first frequency band, to not transmit a channel estimation reference signal through the first frequency band;

generating first control information instructing a second user equipment to transmit a channel estimation reference signal in the first frequency band; and

transmitting a wireless signal including the generated first control information to the second user equipment.

2. The method as claimed in claim 1 , wherein, before the determining step, the method further comprises:

receiving a channel estimation reference signal transmitted by the first user equipment through the first frequency band.

3. The method as claimed in claim 2 , wherein, before receiving the channel estimation reference signal, the method further comprises:

transmitting, to the first user equipment, a wireless signal including second control information instructing the first user equipment to transmit an aperiodic channel estimation reference signal in a second frequency band including the first frequency band.

4. The method as claimed in claim 1 , wherein, after the determining step, the method further comprises:

generating third control information instructing the first user equipment to not transmit a channel estimation reference signal in the first frequency band, and transmitting, to the first user equipment, a wireless signal including the third control information.

5. The method as claimed in claim 1 , wherein, before the determining step, the method further comprises:

receiving, from the first user equipment, an aperiodic channel estimation reference signal transmitted based on one of a one-shot scheme, a demodulation reference signal (DM-RS) scheme, and a burst scheme.

6. The method as claimed in claim 1 , wherein the second user equipment was scheduled to transmit a periodic channel estimation reference signal in a second frequency band adjacent to the first frequency band.

7. The method as claimed in claim 6 , wherein the first control information includes frequency band location information associated with the first frequency band based on the second frequency band.

8. The method as claimed in claim 1 , wherein, after transmitting the wireless signal including the first control information, the method further comprises:

receiving a channel estimation reference signal transmitted by the second user equipment in a second frequency band including the first frequency band.

9. The method as claimed in claim 1 , wherein the first frequency band includes one or more frequency bands allocated to one or more user equipments.

10. A method of transmitting a channel estimation reference signal, the method comprising:

receiving, by a user equipment, a wireless signal including first control information from a base station;

extracting, from the control information, information instructing transmission of a channel estimation reference signal through a first frequency band; and

transmitting a channel estimation reference signal in a second frequency band including the first frequency band.

11. The method as claimed in claim 10 , wherein, before receiving the wireless signal including the control information, the method further comprises:

receiving a wireless signal including second control information associated with scheduling that instructs transmission of a periodic channel estimation reference signal in a third frequency band adjacent to the first frequency band.

12. The method as claimed in claim 10 , wherein the first control information includes frequency band location information associated with the first frequency band based on a third frequency band adjacent to the first frequency band.

13. A device for transmitting control information for expansive transmission of a channel estimation reference signal, the device comprising:

a control information generating unit to determine a first user equipment, which was set to transmit a channel estimation reference signal in a first frequency band, to not transmit a channel estimation reference signal through the first frequency band, and to generate first control information instructing a second user equipment to transmit a channel estimation reference signal in the first frequency band;

a coding unit to generate a wireless signal including the first control information; and

a transceiving unit to transmit the wireless signal to the second user equipment.

14. The device as claimed in claim 13 , wherein, before transmitting the wireless signal to the second user equipment, the transceiving unit receives a channel estimation reference signal transmitted by the first user equipment through the first frequency band.

15. The device as claimed in claim 13 , wherein, before receiving the channel estimation reference signal, the transceiving unit transmits, to the first user equipment, a wireless signal including second control information instructing the first user equipment to transmit an aperiodic channel estimation reference signal in a second frequency band including the first frequency band.

16. The device as claimed in claim 13 , wherein the control information generating unit generates third control information instructing the first user equipment to not transmit a channel estimation reference signal in the first frequency band; and

the transceiving unit transmits a wireless signal including the third control information to the first user equipment.

17. The device as claimed in claim 13 , wherein, before transmitting the wireless signal to the second user equipment, the transceiving unit receives, from the first user equipment, an aperiodic channel estimation reference signal transmitted based on one of a one-shot scheme, a demodulation reference signal (DM-RS) scheme, and a burst scheme.

18. The device as claimed in claim 13 , wherein the second user equipment was scheduled to transmit a periodic channel estimation reference signal in a second frequency band adjacent to the first frequency band.

19. The device as claimed in claim 18 , wherein the first control information includes frequency band location information associated with the first frequency band based on the second frequency band.

20. The device as claimed in claim 13 , wherein the transceiving unit receives a channel estimation reference signal transmitted by the second user equipment in a second frequency band including the first frequency band.

21. The device as claimed in claim 13 , wherein the first frequency band includes one or more frequency bands allocated to one or more user equipments.

22. A device for transmitting a channel estimation reference signal, the device comprising:

an indication information extracting unit to extract information instructing transmission of a channel estimation reference signal through a first frequency band, from first control information included in a wireless signal received from a base station;

a channel estimation reference signal generating unit to generate a channel estimation reference signal to be transmitted in a second frequency band including the first frequency band; and

a transceiving unit to receive a wireless signal including the first control information from the base station, and to transmit the channel estimation reference signal.

23. The device as claimed in claim 22 , wherein, before receiving the wireless signal including the first control information, the transceiving unit receives a wireless signal including second control information associated with scheduling that instructs transmission of a channel estimation reference signal in a third frequency band adjacent to the first frequency band.

24. The device as claimed in claim 22 , wherein the first control information includes frequency band location information associated with the first frequency band, based on a third frequency band adjacent to the first frequency band.