Method for performing CoMP operation in wireless communication system and apparatus for the same

1. A method for performing an Inter-eNB CoMP (Coordinated Multi-Point) operation in a wireless communication system, comprising:

receiving, by a first eNB, a message requesting initiation of a CoMP operation from a second eNB;

transmitting, by the first eNB, to the second eNB a message requesting information about gain expected from a CoMP operation performed in the second eNB;

receiving, by the first eNB, the information about gain expected from the second eNB;

coordinating, by the first eNB, resources for a CoMP operation based on the information of expected gain; and

transmitting, by the first eNB, the resource coordination result to the second eNB.

2. The method of claim 1 , wherein the first eNB transmits a transmission period of the information about expected gain or information about a transmission condition together while requesting the second eNB for the information about expected gain.

3. The method of claim 2 , wherein, if the first eNB receives again the information about expected gain, resources for the CoPM operation are coordinated again.

4. The method of claim 1 , further comprising:

transmitting, by the first eNB, a message for requesting a usage ratio status of resources for the CoMP operation to the second eNB; and

receiving, by the first eNB, a usage ratio status of resources for the CoMP operation from the second eNB.

5. The method of claim 4 , further comprising:

Determining, by the first eNB, whether to stop the CoMP operation based on a usage ratio status of resources for the CoMP operation.

6. The method of claim 5 , further comprising:

if a usage ratio status of resources for the CoMP operation is reduced below a predetermined threshold, transmitting, by the first eNB, a message requesting stopping of the CoMP operation to the second eNB.

7. The method of claim 1 , wherein the resource coordination result includes at least one of information of frequency/time/power/spatial domain resource allocations, the physical resource block (PRB) muting scheduling result, relative narrowband transmit power (RNTP) scheduling result, almost blank sub-frames (ABS) pattern scheduling result, PRB power strength scheduling result and coordination for reference signal configurations, Channel State Information (CSI) processes, and CSI-Interference Measurement (IM) configurations of the first and the second eNBs supposed to perform the CoMP operation.

8. The method of claim 1 , further comprising:

transmitting, by the first eNB, a message requesting the second eNB for measurement information; and

receiving, by the first eNB, the measurement information from the second eNB.

9. The method of claim 8 , wherein the measurement information includes at least one of Channel Stat Information (CSI), Reference Signal Received Power (RSRP), SRS received power, and User perceived throughput.

10. A first eNB for performing an Inter-eNB CoMP operation in a wireless communication system, the first eNB comprising:

a Radio Frequency (RF) unit configured to transmit and receive a radio signal; and

a processor,

wherein the processor is configured to:

receive a message requesting initiation of a CoMP operation from a second eNB,

transmit to the second eNB a message requesting information about expected gain when a CoMP operation is carried out in the second eNB,

receive the information about expected gain from the second eNB,

coordinate resources for a CoMP operation based on the information about expected gain, and

transmit the resource coordination result to the second eNB.