Abstract:
A method of reporting channel state information to a base station at a user equipment (UE) in a wireless communication system is disclosed. The method includes configuring a two-dimensional (2D) antenna array transmission mode of a downlink data channel via a higher layer, receiving an indicator corresponding to one of transmission schemes of the downlink data channel via the higher layer, calculating the channel state information on the assumption of one transmission scheme of the downlink data channel corresponding to the indicator, and reporting the calculated channel state information to the base station. The transmission schemes of the downlink data channel include a demodulation-reference signal (DM-RS) based large delay (LD) cyclic delay diversity (CDD) transmission scheme and a closed loop multiplexing transmission scheme in the 2D antenna array transmission mode.
Abstract:
The present invention relates to a wireless communication system. A method for reporting feedback information on a multicast broadcast multimedia service (MBSFN) transmission by a user equipment in a wireless communication system, the method performed by the user equipment comprising: receiving configuration information for feedback information of the MBSFN transmission; and transmitting feedback information measured in a resource region according to the configuration information, wherein the feedback information may be determined on the basis of a location of a symbol through which a common reference signal (CRS) of an antenna port 0 of an inter-cell is transmitted in the MBSFN.
Abstract:
The present invention relates to a wireless communication system. A method for reporting feedback information of multicast broadcast multimedia services (MBSFN) transmission in a wireless communication system according to an embodiment of the present invention, which comprises the steps of: receiving configuration information for feedback information on the MBSFN transmission; and transmitting the feedback information measured in the resource area according to the configured information, wherein the feedback information can include a single MSFN change quality indicator (CQI) generated using the M (M≧2) number of MB SFN channel state information (CSI) reference resources.
Abstract:
Provided is a method for transmitting information for a coordinated multiple point transmission and reception (CoMP) operation, the method performed by a first evolved node B (eNB) and comprising: calculating a utility metric of a user equipment(s) (UE(s)) using a specific CoMP hypothesis; and transmitting the calculated utility metric and information about a CoMP hypothesis associated with the utility metric, to a second eNB, wherein the specific CoMP hypothesis comprises information about an eNB(s) hypothesized to perform specific-level power transmission among eNBs participating in the CoMP operation together with the first eNB.
Abstract:
In this application, a method for a terminal cancelling interference from a neighboring cell is disclosed. More specifically, the method comprises the steps of: receiving one or more interference cancellation assistance information indicating one of a plurality of parameter combinations for detecting an interference signal from the neighboring cell; detecting an interference signal from the neighboring cell, based on the one or more interference cancellation assistance information and cancelling the interference signal in signals received from a serving cell, wherein the interference signal is a downlink data channel of the neighboring cell or a downlink control channel of the neighboring cell, and the plurality of parameter combinations is configured through a higher layer.
Abstract:
Disclosed is a method of mapping a demodulation-reference signal (DM-RS) transmitted to a terminal by a base station in a wireless communication system based on multiple antennas. Specifically, the method includes grouping a plurality of DM-RS ports into antenna port groups including a predefined number of DM-RS ports, mapping a DM-RS sequence to two symbol resources of a first slot and two symbol resources of a second slot on one subcarrier, and transmitting the mapped DM-RS sequence to the terminal through the plurality of DM-RS ports, wherein a DM-RS sequence transmitted through DM-RS ports included in the same antenna port group is mapped by applying an orthogonal cover code (OCC) having a length of 2 to the same symbol resource, and the two symbol resources of the first slot correspond to a first antenna port group and the two symbol resources of the second slot correspond to a second antenna port group on the one subcarrier.
Abstract:
A method for receiving channel state information (CSI) feedback by a base station supporting multiple transmit antennas from a mobile station; the base station therefore; a method for transmitting CSI feedback by a mobile station to a base station supporting multiple transmit antennas; and the mobile station therefore are discussed. The method for receiving CSI feedback by a base station includes according to one embodiment configuring, by the base station via radio resource control (RRC) signaling, one or more channel state information-reference signal (CSI-RS) configurations and one or more null resource element (RE) configurations; transmitting CSI-RSs; and receiving the CSI feedback measured based on the CSI-RSs and the one or more null RE configurations. The one or more CSI-RS configurations are used for a channel quality measurement of the CSI feedback. The one or more null RE configurations are used for an interference measurement of the CSI feedback.
Abstract:
The present invention relates to a wireless communication system, and more particularly, to a method and device for performing or supporting NIB coordinated multi-point (CoMP) transmission in a wireless communication system. The method for performing NIB CoMP transmission in the wireless communication system according to an embodiment of the present invention may include: receiving signaling comprising at least one CoMP hypothesis set and at least one benefit metric information bit from a first network node, at a second network node; performing CoMP transmission based on the at least one CoMP hypothesis set, at the second network node. The at least one CoMP hypothesis set and the at least one benefit metric information bit are defined in information element format included in the signaling, and information indicated by the at least one benefit metric information comprises specific information, for which the at least one benefit metric information configured as special value.
Abstract:
The present invention relates to a wireless communication system. A method by which a terminal cancels interference and receives data in a wireless communication system, according to one embodiment of the present invention, comprises the steps of receiving first downlink control information (DCI) including scheduling information for receiving a physical downlink shared channel (PDSCH) from a base station, receiving second DCI including scheduling information on an interference channel from a second base station, and canceling the interference from the second base station on the basis of the first DCI and the second DCI, and receiving the PDSCH.
Abstract:
A method and apparatus for reporting a downlink channel state are disclosed. The method for reporting channel state information (CSI) to a base station (BS) by a user equipment (UE) in a wireless communication system having frequency-selective inter-cell interference, includes: performing channel measurement in a frequency band configured for downlink channel measurement; and reporting downlink channel state information (CSI) in accordance with the downlink channel measurement, wherein the frequency band is independently configured for each information contained in the CSI, and thus the downlink channel measurement is performed in each information-specifically configured frequency band contained in the CSI. As a result, the method and apparatus can efficiently report downlink channel state information, such that a higher-quality communication environment is expected in a heterogeneous cell environment.