Method for transmitting or receiving demodulation reference signal in wireless communication system and apparatus therefor
AssigneeLG Electronics Inc.
InventorsGyoungil KWAK, Yunjung YI, Hyunho LEE
Life of this patent
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Abstract
In a method for supporting a short transmission time interval (sTTI) in a wireless communication system according to one embodiment of the present invention, the method is performed by a terminal, and comprises the steps of: receiving a reference signal for decoding a downlink channel; and decoding the downlink channel by using the reference signal for decoding the downlink channel, wherein the reference signal for decoding the downlink channel may be transmitted by using a pattern to which a frequency separation is applied, in the case of collision with a cell-specific reference signal.
Claims9
1-10. (canceled)
A method of receiving a short transmission time interval (sTTI)-based downlink (DL) signal by a user equipment (UE) in a wireless communication system, the method comprising:
- receiving at least a cell specific reference signal (CRS) or channel state information (CSI)-RS in a first set of resource elements;
- receiving a demodulation reference signal (DMRS) for a DL channel in a second set of resource elements in a sTTI;
- and
- demodulating the DL channel using the DMRS,
- wherein the first set of resource elements are determined based on a frequency shift value, and
- wherein the second set of resource elements is a frequency shifted set of default resource elements for the DMRS if the default resource elements for the DMRS collides with at least the CRS or the CSI-RS, and
- wherein the frequency shifted set of default resource elements for the DMRS is determined based on the frequency shift value.
A user equipment (UE) for receiving a short transmission time interval (sTTL)-based downlink (DL) signal in a wireless communication system, the UE comprising:
- a receiver and a transmitter;
- and
- a processor configured to control the receiver and the transmitter,
- wherein the processor further configured to:
- receive at least a cell specific reference signal (CRS) or channel state information (CSI)-RS in a first set of resource elements,
- receive a demodulation reference signal (DMRS) for a DL channel in a second set of resource elements in a sTTI, and
- demodulate the DL channel using the DMRS, and
- wherein the first set of resource elements are determined based on a frequency shift value, and
- wherein the second set of resource elements is a frequency shifted set of default resource elements for the DMRS if the default resource elements for the DMRS collides with at least the CRS or the CSI-RS, and
- wherein the frequency shifted set of default resource elements for the DMRS is determined based on the frequency shift value.
Dependencies are inferred from the claim text.