Method for receiving downlink data channels in multicell-based wireless communication systems and apparatus for same
The present invention relates to a method by which a terminal receives a downlink data channel in a wireless communication system. In detail, the method includes the steps of receiving from a network information on one or more settings defining large scale properties of a terminal-specific reference signal through a higher layer; detecting from the network one of either the first scheduling information or the second scheduling information on a downlink data channel based on a terminal-specific reference signal; and receiving the downlink data channel based on the terminal-specific reference signal on the basis of the detected scheduling information, wherein the first scheduling information includes an indicator indicating one or more of the settings, and the large scale properties of the terminal-specific reference signal are defined according to the setting indicated by the indicator during the detection of the first scheduling information, and a preset setting from among the one or more settings set during the detection of the second scheduling information.
1. A method of receiving a user equipment (UE)-specific reference signal based-downlink data channel by a UE in a wireless communication system, the method comprising:
receiving information on one or more configurations defining a large scale property of a UE-specific reference signal from a network via an upper layer;
detecting either first scheduling information or second scheduling information for the UE-specific reference signal based-downlink data channel from the network; and
receiving the UE-specific reference signal based-downlink data channel based on the detected scheduling information,
wherein the first scheduling information comprises an indicator indicating one of the one or more configurations,
wherein the large scale property of the UE-specific reference signal is defined according to a configuration indicated by the indicator when the first scheduling information is detected and is defined according to a predetermined configuration among the one or more configurations when the second scheduling information is detected, and
wherein the predetermined configuration corresponds to a configuration of a minimum index among the one or more configurations.
2. The method of claim 1 , wherein the information on the one or more configurations comprises information on a specific reference signal capable of assuming that the UE-specific reference signal is identical to the large scale property.
3. The method of claim 2 , wherein the specific reference signal corresponds to a channel status information-reference signal (CSI-RS).
4. The method of claim 2 , wherein the information on the specific reference signal indicates resource configuration information of the specific reference signal.
5. The method of claim 1 , wherein the information on the one or more configurations comprises information on there is no specific reference signal capable of assuming that the UE-specific reference signal is identical to the large scale property.
6. The method of claim 5 , wherein the specific reference signal corresponds to a channel status information-reference signal (CSI-RS).
7. The method of claim 1 , wherein the large scale property corresponds to information on a frequency offset and information on a timing offset for synchronization tracking.
8. The method of claim 1 , wherein the large scale property comprises at least one selected from the group consisting of Doppler spread, Doppler shift, average delay and delay spread.
9. A method of transmitting a user equipment (UE)-specific reference signal based-downlink data channel by a network in a wireless communication system, the method comprising:
transmitting information on one or more configurations defining a large scale property of a UE-specific reference signal to a UE via an upper layer;
transmitting either first scheduling information or second scheduling information for the UE-specific reference signal based-downlink data channel to the UE; and
transmitting the UE-specific reference signal based-downlink data channel to the UE,
wherein the first scheduling information comprises an indicator indicating one of the one or more configurations,
wherein the large scale property of the UE-specific reference signal is defined according to a configuration indicated by the indicator when the first scheduling information is detected and is defined according to a predetermined configuration among the one or more configurations when the second scheduling information is detected, and
wherein the predetermined configuration corresponds to a configuration of a minimum index among the one or more configurations.
10. The method of claim 9 , wherein the information on the one or more configurations comprises information on a specific reference signal capable of assuming that the UE-specific reference signal is identical to the large scale property.
11. The method of claim 10 , wherein the specific reference signal corresponds to a channel status information-reference signal (CSI-RS).
12. The method of claim 10 , wherein the information on the specific reference signal indicates resource configuration information of the specific reference signal.
13. The method of claim 9 , wherein the information on the one or more configurations comprises information on there is no specific reference signal capable of assuming that the UE-specific reference signal is identical to the large scale property.
14. The method of claim 13 , wherein the specific reference signal corresponds to a channel status information-reference signal (CSI-RS).
15. The method of claim 9 , wherein the large scale property corresponds to information on a frequency offset and information on a timing offset for synchronization tracking.
16. The method of claim 9 , wherein the large scale property comprises at least one selected from the group consisting of Doppler spread, Doppler shift, average delay and delay spread.
17. A user equipment (UE) in a wireless communication system, the UE comprising:
a receiver; and
a processor configured to:
control the receiver to receive information on one or more configurations defining a large scale property of a UE-specific reference signal from a network via an upper layer;
detect either first scheduling information or second scheduling information for a UE-specific reference signal based-downlink data channel from the network; and
control the receiver to receive the UE-specific reference signal based-downlink data channel based on the detected scheduling information,
wherein the first scheduling information comprises an indicator indicating one of the one or more configurations,
wherein the large scale property of the UE-specific reference signal is defined according to a configuration indicated by the indicator when the first scheduling information is detected, and is defined according to a predetermined configuration among the one or more configurations when the second scheduling information is detected, and
wherein the predetermined configuration corresponds to a configuration of a minimum index among the one or more configurations.