Method and apparatus for transmitting or receiving downlink signal

摘要

Provided is a method for receiving a downlink signal by a user equipment (UE) in a wireless communication system supporting Coordinated Multi-point transmission and reception includes: receiving a list of candidate seeds for generating a sequence of a downlink demodulation reference signal (DM-RS) and downlink control information, and detecting the DCI; if a format of the detected DCI corresponds to a unique operation of a transmission mode configured to the UE, generating a sequence of the downlink DM-RS using one seed value selected from among the list of the candidate seeds on the basis of specific information included in the DCI; and if a format of the detected DCI corresponds to a fall-back operation of the transmission mode, generating a sequence of the downlink DM-RS using a specific seed value selected from among the list of the candidate seeds or an identifier (ID) of a serving cell.

主权项

1. A method for receiving a downlink signal by a user equipment (UE) in a wireless communication system supporting Coordinated Multi-point transmission and reception (CoMP), the method comprising:
receiving a list of candidate seeds for generating a sequence of a downlink demodulation reference signal (DM-RS), the list of candidate seeds including at least one physical cell identity (PCID) and at least two virtual cell ID (VCID); receiving a subset of the list of candidate seeds, the subset including two cell IDs among the at least one PCID and the at least two VCID; selecting one cell ID among the two cell IDs included in the subset of the list of candidate seeds; and generating the sequence of the downlink DM-RS using the selected one cell ID.