Method for transmitting and receiving reference signal and apparatus therefor
The present disclosure provides a method for receiving a channel state information-reference signal (CSI-RS) by a UE in a wireless communication system. Particularly, the method includes receiving information on a measurement bandwidth and cell list information for a plurality of cells, receiving CSI-RSs of the plurality of cells, and measuring reception power for the CSI-RSs within the measurement bandwidth, wherein sequences of the CSI-RSs are mapped to physical resources based on the same reference position configured by a higher layer.
1. A method for receiving a channel state information-reference signal (CSI-RS) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving information related to a same reference position used for mapping of CSI-RSs of a plurality of cells;
receiving information related to a measurement bandwidth for at least one cell among the plurality of cells;
receiving, from at least one cell, a CSI-RS within the measurement bandwidth; and
measuring reception power for the CSI-RS,
wherein sequence elements for the CSI-RS are mapped based on the same reference position, and
wherein, among the sequence elements for the CSI-RS, one or more sequence elements for the CSI-RS mapped within the measurement bandwidth are received.
2. The method according to claim 1 , wherein each first sequence element for each of the CSI-RSs of the plurality of cells is mapped to a subcarrier for the same reference position.
3. The method according to claim 1 , comprising reporting information related to reception power of at least one cell.
4. The method according to claim 1 , wherein the sequence elements for the CSI-RS are generated based on a scrambling ID of a corresponding cell configured by the higher layer.
5. The method according to claim 1 , wherein the information related to the measurement bandwidth includes information related to the starting resource block (RB) of the measurement bandwidth.
6. A user equipment (UE) receiving a channel state information-reference signal (CSI-RS) in a wireless communication system, the UE comprising:
a transceiver for transmitting/receiving signals to/from a base station; and
a processor for controlling the transceiver,
wherein the processor is configured:
to control the transceiver to receive information related to a same reference position used for mapping of CSI-RSs of a plurality of cells;
to control the transceiver to receive information related to a measurement bandwidth for at least one cell among the plurality of cells;
to control the transceiver to receive a CSI-RS from at least one cell within the measurement bandwidth; and
to measure reception power for the CSI-RS,
wherein sequence elements for the CSI-RS are mapped based on the same reference position, and
wherein, among the sequence elements for the CSI-RS, one or more sequence elements for the CSI-RS mapped within the measurement bandwidth are received.
7. The UE according to claim 6 , wherein each first sequence element for each of the CSI-RSs of the plurality of cells is mapped to a subcarrier for the same reference position.
8. The UE according to claim 6 , wherein the processor controls the transceiver to report information related to reception power of at least one cell.
9. The UE according to claim 6 , wherein the sequence elements for the CSI-RS are generated based on a scrambling ID of a corresponding cell configured by the higher layer.
10. The UE according to claim 6 , wherein the information related to the measurement bandwidth includes information related to the starting resource block (RB) of the measurement bandwidth.
11. An apparatus for receiving a channel state information-reference signal (CSI-RS) in a wireless communication system, the apparatus comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
receiving information related to a same reference position used for mapping of CSI-RSs of a plurality of cells;
receiving information related to a measurement bandwidth for at least one cell among the plurality of cells;
receiving, from at least one cell, a CSI-RS within the measurement bandwidth; and
measuring reception power for the CSI-RS,
wherein sequence elements for the CSI-RS are mapped based on the same reference position, and
wherein, among the sequence elements for the CSI-RS, one or more sequence elements for the CSI-RS mapped within the measurement bandwidth are received.