Abstract:
The method for channel information feedback based on multiple cell collaboration comprises a step wherein first channel quality information including the channel information between the terminal and base station is transmitted to the base station; a step wherein after the first channel quality information is sent; a channel quality information request message is received from the base station; and a step wherein in response to the channel quality information request message, second channel quality information is sent, including channel information between the terminal and the base station and adjacent base stations.
Abstract:
The present invention relates to a wireless communication system. A method for user equipment estimating a channel in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving information on at least one channel state information (CSI) configuration for reporting the channel state information (CSI) of one serving cell from among a plurality of serving cells; determining to apply the same precoding matrix to a plurality of resource blocks when one or more CSI configurations are all set to report a precoding matrix indicator (PMI) and a rank indicator (RI), and determining to apply the precoding matrix to one resource block when a CSI configuration that is configured to not report the PMI and the RI exists among the one or more CI configurations.
Abstract:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for reporting channel state information, the method and the apparatus comprising the following steps: measuring downlink signals from a plurality of base stations; feeding back a first channel state information on a first base station in subband units, wherein the first channel state information includes identification information for indicating a corresponding subband; and feeding back a second channel state information on a second base station in subband units, wherein the subband which corresponds to the second channel state information is set to be identical to the subband which corresponds to the first channel state information, and wherein the second channel state information does not include identification information for indicating the corresponding subband.
Abstract:
The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting channel state information in a cooperative multipoint communication system. A method for a terminal transmitting the channel state information (CSI) to multiple base stations in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving a first piece of CSI setting information with respect to reporting of CSI comprising at least one of a rank indicator (RI), a precoding matrix indicator (PMI), and a channel quality indicator (CQI), with respect to a first base station; receiving a second piece of CSI setting information with respect to reporting of CSI comprising at least one of an RI, a PMI, and a CQI, with respect to a second base station; and transmitting the CSI with respect to the first base station and the second base station on the basis of the CSI setting information on the first and second base stations, wherein a parameter of a portion or all of the second CSI setting information can be set to a value equal to a parameter that corresponds to the first CSI setting information.
Abstract:
The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving an uplink hybrid automatic repeat request (HARQ). According to one embodiment of the present invention, a method for performing a HARQ operation in a terminal of a wireless communication system comprises the steps of: receiving, in a subframe n, an uplink grant message for first uplink data from a base station; determining a first HARQ process from among a plurality of HARQ processes associated with the subframe n; and transmitting, in a subframe n+k, the first uplink data to the base station through the first HARQ process.
Abstract:
The present invention relates to a wireless communication system, and more specifically to a method and an apparatus for transmitting channel status information. According to the present invention, a method for enabling a terminal to transmit channel status information (CSI) with respect to cooperative transmission in the wireless communication system, includes the steps of: determining a first precoding matrix indicator (PMI) for a first cell and a second PMI for a second cell; and transmitting the CSI including the first PMI and the second PMI, wherein the CSI is determined on the basis of a coupled precoding matrix in which the first precoding matrix corresponding to the first PMI is coupled with the second precoding matrix corresponding to the second PMI, and the coupled precoding matrix can be determined by a first coupling type or a second coupling type.
Abstract:
Disclosed is a method for a terminal to receive a control channel in a wireless communication system. More particularly, the present invention comprises the steps of: receiving a common control channel from a base station; determining an effective channel between the base station and the terminal according to a flag bit of the terminal being indicated in the common control channel; and receiving a terminal specific control channel from the base station on the basis of the effective channel, wherein the terminal specific control channel is space-multiplexed with terminal specific control channels of other terminals controlled by the base station.
Abstract:
Disclosed is a method for transmitting a downlink signal in a multicell cooperative wireless communication system. More particularly, the present invention comprises the steps of: a first sending end transmitting a control channel and a data channel, and one or more second sending ends transmitting only the data channel, in a first subframe; and the first sending end transmitting only the data channel and one or more of the second sending ends transmitting the control channel and the data channel, in a second subframe, wherein the data channel transmitted by one or more of the second sending ends in the first subframe is decoded on the basis of the control channel transmitted by one or more of the second sending ends in the second subframe.
Abstract:
The present invention relates to a wireless communication system. A method for cancelling interference and receiving a signal by a terminal in a wireless communication system according to an embodiment of the present invention comprises the steps of: receiving auxiliary information, by a terminal, for canceling an interference signal transmitted from an interference base station; and cancelling the interference signal on the basis of the auxiliary information and receiving a desired signal from a serving base station, wherein the terminal can assume a part of the auxiliary information for cancelling the interference signal as a limited value and then receive the interference signal.
Abstract:
The embodiments of the present invention relate to a method for transmitting control information by a base station in a wireless communication system, wherein the method comprises a step of transmitting a physical downlink control channel (PDCCH). The downlink control information of the PDCCH may include an indicator indicating whether or not a reference signal is transmitted in a time domain corresponding to the subframe in which the PDCCH is transmitted.