Method for transceiving signal in wireless communication system and apparatus therefor

1. A method of receiving a reference signal by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, by the UE, a discovery reference signal (DRS) from a second transmission point (TP) using DRS configuration obtained from a first TP;

activating, by the UE, a connection with the second TP according to a result of radio resource management (RRM) measurement measured on the DRS; and

receiving, by the UE, a feedback reference signal (FB-RS) for channel state information (CSI) measurement from the activated second TP based on a FB-RS configuration,

wherein the CSI measurement is different from the RRM measurement,

wherein the UE obtains the FB-RS configuration for the CSI measurement by modifying at least one parameter of the DRS configuration for the RRM measurement, and

wherein if a single physical cell ID is shared between the first TP and the second TP, a connection between the user equipment and the second TP is activated without radio resource control (RRC) reconfiguration.

2. The method of claim 1 , wherein activating the connection with the second TP comprises:

receiving a semi-static point switching message from the first TP via a medium access control (MAC) layer; and

activating the second TP as a secondary cell (SCell) based on the semi-static point switching message.

3. The method of claim 1 , further comprising:

receiving information on a transmission period, a transmission offset, number of transmission antennas, or quasi co-location (QCL) assumption of the DRS configuration, which is changed to obtain the FB-RS configuration of the second TP, via a MAC layer or a physical layer.

4. The method of claim 1 , wherein receiving the FB-RS comprises:

receiving information on a first feedback-configuration-index associated with the DRS received from the second TP among a plurality of feedback-configuration-indexes set to the user equipment in advance via radio resource control (RRC),

wherein the FB-RS configuration is identified by the first feedback-configuration-index.

5. The method of claim 1 , wherein the second TP belongs to a group of a plurality of TPs sharing the single physical cell ID and wherein a plurality of the TPs belonging to the group of the TPs are activated or deactivated according to a semi-static point switching operation.

6. The method of claim 5 , wherein the group of a plurality of the TPs shares at least one of an enhance physical downlink control channel (EPDCCH) configuration, a channel state information (CSI) report configuration, a demodulation reference signal (DMRS) scrambling ID configuration, and a transmission mode.

7. The method of claim 1 , wherein the first TP corresponds to a macro cell of the second TP always operating as a primary cell (PCell) in response to the user equipment or a small cell operating as a secondary cell (SCell) of the user equipment which is deactivated according to activation of the second TP.

8. A user equipment receiving a reference signal in a wireless communication system, comprising:

a receiver to receive a discovery reference signal (DRS) from a second transmission point (TP) using DRS configuration obtained from a first TP; and

a processor to activate a connection with the second TP according to a result of radio resource management (RRM) measurement measured on the DRS;

wherein the processor controls the receiver to receive a feedback reference signal (FB-RS) for channel state information (CSI) measurement from the activated second TP based on a FB-RS configuration,

wherein the CSI measurement is different from the RRM measurement,

wherein the processor obtains the FB-RS configuration for the CSI measurement by modifying at least one parameter of the DRS configuration for the RRM measurement, and

wherein if a single physical cell ID is shared between the first TP and the second TP, a connection between the user equipment and the second TP is activated without radio resource control (RRC) reconfiguration.