METHOD AND APPARATUS FOR TRANSRECEIVING DOWNLINK SIGNAL BY CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM
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Abstract
The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment decoding an enhanced physical downlink control channel (EPDCCH) in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining a quasi co-location (QCL) of an antenna port of the EPDCCH; and decoding the EPDCCH based on the QCL with respect to the antenna port of the EPDCCH. The user equipment can determine a QCL assumption between an antenna port of an EPDCCH demodulation reference signal and an antenna port of a different reference signal based on the type of a QCL assumption with respect to a PDSCH.
7 Citations
28 Claims
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1-13. -13. (canceled)
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14. A method for transmitting an enhanced physical downlink control channel (EPDCCH) to a user equipment (UE) by a base station in a wireless communication system, the method comprising:
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transmitting an indication indicating a first assumption or a second assumption for decoding a physical downlink shared channel (PDSCH) to the UE; and transmitting the EPDCCH to the UE, wherein the first assumption indicates that antenna ports for a cell-specific reference signal (CRS), a UE-specific reference signal (RS) for the physical downlink shared channel (PDSCH), and a channel state information-RS (CSI-RS) are quasi co-located, and wherein, when the indication indicates the first assumption, the EPDCCH is decoded on an assumption that antenna ports for the CRS and a demodulation RS (DMRS) for the EPDCCH are quasi co-located. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A base station for transmitting an enhanced physical downlink control channel (EPDCCH) to a user equipment (UE) in a wireless communication system, the UE comprising:
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a transceiver; and a processor configured to control the transceiver, wherein the processor is further configured to; transmit an indication indicating a first assumption or a second assumption for decoding a physical downlink shared channel (PDSCH) to the UE, and transmit the EPDCCH to the UE, wherein the first assumption indicates that antenna ports for a cell-specific reference signal (CRS), a UE-specific reference signal (RS) for the physical downlink shared channel (PDSCH), and a channel state information-RS (CSI-RS) are quasi co-located, and wherein, when the indication indicates the first assumption, the EPDCCH is decoded on an assumption that antenna ports for the CRS and a demodulation RS (DMRS) for the EPDCCH are quasi co-located. - View Dependent Claims (26, 27, 28)
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Specification