Method for handling collision between CSI-RS and DMRS in wireless communication system, and device therefor
The present specification provides a method for handling a collision between a demodulation reference signal (DMRS) and a channel state information-reference signal (CSI-RS) in a wireless communication system. Specifically, the method performed by a terminal comprises the steps of: receiving a DMRS from a base station; receiving a CSI-RS from the base station; and when a collision between the DMRS and the CSI-RS occurs on at least one resource element (RE), puncturing a resource associated with the DMRS, or a resource associated with the CSI-RS on the basis of time domain behavior of the CSI-RS.
1. A method for handling a collision between a demodulation reference signal (DMRS) and a channel state information-reference signal (CSI-RS) in a wireless communication system, the method performed by a user equipment (UE), the method comprising:
receiving the DMRS from a base station;
receiving the CSI-RS from the base station; and
based on a collision occurring between the DMRS and the CSI-RS in at least one resource element (RE), puncturing a resource based on a time domain behavior of the CSI-RS,
wherein, based on the time domain behavior of the CSI-RS being of an aperiodic CSI-RS, a resource related to the CSI-RS is punctured, and
wherein, based on the time domain behavior of the CSI-RS being of a periodic or a semi-persistent (SP) CSI-RS, a resource related to the DMRS is punctured.
2. The method of claim 1 , wherein
puncturing the resource related to the CSI-RS includes:
performing measurement based on a CSI-RS received in a resource which does not include the at least one RE; and
reporting information for the measurement to the base station.
3. The method of claim 2 , wherein
the information for the measurement includes information related to the collision.
4. The method of claim 1 , wherein
the resource related to the CSI-RS is a CSI-RS RE that has a code division multiplexed (CDM) relationship, in at least one of a time domain or a frequency domain, with the at least one RE.
5. The method of claim 4 , wherein
information related to the collision includes at least one of Q) information for a number of antenna ports where the collision does not occur or (ii) information indicating that a collision has occurred in the resource related to the CSI-RS.
6. The method of claim 1 , wherein
puncturing the resource related to the DMRS includes:
performing demodulation based on a DMRS received in a resource that does not include the at least one RE.
7. The method of claim 1 , further comprising
receiving information related to an additional DMRS configuration from the base station.
8. The method of claim 7 , wherein
the additional DMRS configuration is determined based on a number of DMRS symbols where the collision has occurred.
9. A UE for handling a collision between a demodulation reference signal (DMRS) and a channel state information-reference signal (CSI-RS) in a wireless communication system, the UE comprising:
a radio frequency (RF) module for transmitting/receiving a radio signal; and
a processor functionally connected with the RF module, wherein the processor is configured to:
receive the DMRS from a base station;
receive the CSI-RS from the base station; and
based on a collision occurring between the DMRS and the CSI-RS in at least one resource element (RE), puncture a resource based on a time domain behavior of the CSI-RS,
wherein, based on the time domain behavior of the CSI-RS being of an aperiodic CSI-RS, a resource related to the CSI-RS is punctured, and
wherein, based on the time domain behavior of the CSI-RS being of a periodic or a semi-persistent (SP) CSI-RS, a resource related to the DMRS is punctured.
10. The UE of claim 9 , wherein
puncturing the resource related to the CSI-RS includes:
performing measurement based on a CSI-RS received in a resource which does not include the at least one RE; and
reporting information for the measurement to the base station.
11. The UE of claim 10 , wherein
the information for the measurement includes information related to the collision.
12. The UE of claim 9 , wherein
the resource related to the CSI-RS is a CSI-RS RE that has a code division multiplexed (CDM) relationship, in at least one of a time domain or a frequency domain, with the at least one RE.
13. The UE of claim 12 , wherein
information related to the collision includes at least one of (i) information for a number of antenna ports where the collision does not occur or (ii) information indicating that a collision has occurred in the resource related to the CSI-RS.
14. The UE of claim 9 , wherein
puncturing the resource related to the DMRS includes:
performing demodulation based on a DMRS received in a resource that does not include the at least one RE.
15. The UE of claim 9 , wherein the processor is further configured to:
receive information related to an additional DMRS configuration from the base station.
16. The UE of claim 15 , wherein
the additional DMRS configuration is determined based on a number of DMRS symbols where the collision has occurred.