Abstract:
The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for estimating a channel using a reference signal. According to one embodiment of the present invention, a method in which a terminal estimates a channel in a wireless communication system may comprise the steps of: receiving a cell-specific reference signal (CRS) and a channel state information-reference signal (CSI-RS) from a base station; generating CSI of a channel estimated using the CRS on the basis of a channel estimated using the CSI-RS and a mapping relationship between the CRS port and the CSI-RS port; reporting the generated CSI to the base station; and demodulating data on the basis of the channel estimated using the CRS.
Abstract:
The present invention relates to a method and device for receiving a downlink signal by a terminal in a wireless communication system. More particularly, the method includes: receiving first quasi co-location (QCL) characteristic-related information for the downlink communication of a first RF resource; and receiving a downlink signal by using a second RF resource, wherein the second RF resource indicates an RF resource when the use of an RF resource is changed from uplink communication use to downlink communication use at a specific time, and a downlink signal is decoded by using second QCL characteristic-related information for the downlink communication of the second RF resource, and the first QCL characteristic-related information and the second QCL characteristic-related information are independently defined.
Abstract:
In an aspect of the present invention, provided herein is a method for receiving information for interference cancellation of a mobile terminal, the method comprising: receiving, from a base station, multi-user downlink control information (MU DCI) including CRC scrambled with an identifier (ID) of a user group, the MU DCI including control information for a plurality of mobile terminals belonging to the user group, information indicating the number of mobile terminals simultaneously scheduled by the MU DCI in a subframe, and an index allocated to each mobile terminal being added to the end of the control information for each mobile terminal; and receiving downlink data for other mobile terminals in the user group using the control information for the other mobile terminals if the control information for the mobile terminal is included in the MU DCI.
Abstract:
In the present invention, disclosed is a method for a terminal, which receives a downlink signal from a first base station and transmits an uplink signal to a second base station, transmitting a sounding reference signal (SRS) in a wireless communication system. More specifically, the method comprises the steps of: receiving from the first base station downlink control information including a triggering message of a first SRS; determining transmission power of the first SRS on the basis of the downlink control information; and transmitting the first SRS to the first base station with the transmission power that is determined, wherein a transmission power control command field, which is included in the downlink control information, is applied to a closed loop parameter for determining the transmission power of the first SRS.
Abstract:
The present invention relates to a wireless communication system. A method by which a user equipment reports a channel state information (CSI) in a wireless communication system, according to one embodiment of the present invention, can comprise the steps of: setting up a first CSI process in which a subframe pattern for a first subframe set, which uses an almost blank subframe (ABS), and a second subframe set, which does not use the ABS, is set; setting up a second CSI process in which the subframe pattern is not set; setting a second rank indicator (RI) of the second CSI process to be the same as a first RI corresponding to the second subframe set when the second CSI process is established so as to have the same RI as the first CSI process; and transmitting the CSI on the basis of the first CSI process and/or the second CSI process.
Abstract:
A method for receiving, by a UE, information for interference cancellation, the method includes receiving assistance control information for removing interference data from a neighboring eNB; and receiving primary control information indicating the interference data using the assistance control information, the assistance control information includes at least one of control channel element (CCE) indices, an aggregation level and a downlink control information (DCI) format of a control channel on which the primary control information is transmitted and cyclic redundancy check (CRC) bits for the control channel, the assistance control information includes sub-assistance control information on neighboring UEs simultaneously scheduled by the neighboring eNB.
Abstract:
One embodiment of the present invention discloses a method by which a CoMP scheduling device determines a CoMP set in a wireless communication system that supports coordinated multiple-point transmission and reception (CoMP), the method comprising the steps of receiving, from at least one base station, information on a terminal served by the base station; determining a CoMP set on the basis of the received information on the terminal (s); and transmitting identification information of the terminal(s) included in the CoMP set to a base station(s) included in the CoMP set, wherein the information on the terminal can include the identification information of the terminal, capability, quality of service (QoS), a channel state value between the terminal and each base station around the terminal, and/or ePDCCH set configuration information of the terminal.
Abstract:
The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for transmitting or receiving a downlink signal considering an antenna port relationship. The method for enabling a terminal to receive a physical downlink sharing channel (PDSCH) signal in the wireless communication system according to one embodiment of the present invention can determine a PDSCH start symbol index according to the predetermined priority and receive the PDSCH signal therethrough. The PDSCH start symbol index can be determined when a PDSCH start symbol value included in a PDSCH resource element mapping and Quasi co-location Indicator (PQI) parameter set is determined by an upper layer. The PDSCH start symbol index can be determined according to the PDSCH start symbol value for a cell receiving the PDSCH when the PDSCH start symbol value included in the PQI parameter set is not determined by the upper layer.
Abstract:
The present invention relates to a wireless communication system and, more specifically, provides a method for controlling uplink power and a device therefor. The method whereby user equipment controls uplink transmission power in a wireless communication system according to one embodiment of the present invention may comprise the steps of: receiving configuration information regarding a plurality of subframe sets from a base station; receiving, in the subframe index j, transmission power control (TPC) information from the base station; and determining transmission power for an uplink channel in the subframe index i on the basis of the TPC information. The TPC information may be applied to a power control process related to a first subframe set, to which the subframe index i belongs, among the plurality of subframe sets.
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 receiving a physical downlink shared channel (PDSCH) signal in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining from the downlink subframe a resource element (RE) on which the PDSCH is mapped; and receiving the PDSCH signal based on the RE on which the PDSCH is mapped, wherein when the DCI is comprised according to DCI format 1A and the downlink subframe is a multicast broadcast single frequency network (MBSFN) subframe, the RE on which the PDSCH is mapped can be determined depending on cell-specific reference signal (CRS) location information, which is included in a PDSCH resource element mapping and Quasi co-location indicator (PQI) parameter set that is established by an upper layer.