Abstract:
The present invention relates to a wireless communication system. In detail, the invention relates to a method for a terminal to transmit a UCI in a carrier aggregation-based wireless communication system, and to an apparatus therefor, wherein the method involves the steps of: forming a first cell group having a PCell; forming a second cell group having one or more SCells; receiving one or more data in the second cell group; and transmitting HARQ-ACK information on the one or more data through a PUCCH, wherein, when the first and second cell groups are managed by an identical base station, the HARQ-ACK information is transmitted in the PCell, and, when the first and second cell groups are managed by different base stations, the HARQ-ACK information is transmitted in the second cell group.
Abstract:
Disclosed are a method and an apparatus for uplink transmission. A method for uplink transmission for a machine-type communication (MTC) terminal comprises: a step of transmitting first uplink (UL) information via a first UL channel in a first terminal-specific frequency band of a first subframe; and a step of transmitting second UL information via a second UL channel in a second terminal-specific frequency band of a second subframe subsequent to the first subframe. The first subframe and the second subframe each include a plurality of orthogonal frequency division multiplexing (OFDM) symbols. If the first terminal-specific frequency band and the second terminal-specific frequency band do not overlap one another, the second UL information may not be transmitted in a first OFDM symbol of the second subframe. Thus, a wireless resource can be efficiently utilized.
Abstract:
The method and the apparatus for reporting CSI are provided. The method comprises receiving reference signal on downlink channel, selecting CQI corresponding to a channel state based on the reference signal and transmitting CSI report comprising the selected CQI, wherein the step of selecting CQI includes selecting CQI index on a CQI table where the CQI index specifies modulation.
Abstract:
The present invention relates to a wireless access system which supports a machine-type communication (MTC), and more specifically, provides a method for repeatedly transmitting a physical downlink control channel (PDCCH) for an MTC terminal, and an apparatus for supporting same. The method by which a base station transmits a physical downlink control channel (PDCCH) in a wireless access system which supports a machine-type communication (MTC), according to one embodiment of the present invention, comprises the steps of: generating parity bits by encoding control information included in a PDCCH; generating PDCCH encoded bits by performing rate matching on the parity bits; and repeatedly transmitting the PDCCH encoded bits in at least two subframes. The PDCCH may be transmitted for the MTC terminal.
Abstract:
Provided through the present application are a method and an apparatus for use in a radio communication system, which supports carrier aggregation and carries out communication in subframe units. More specifically, user equipment operating in a first type carrier for receiving from a base station, a first piece of control information, which is related to the first type carrier and a second type carrier that support the carrier aggregation, can measure a radio signal to carry out radio resource management with respect to the first type carrier by using a first reference signal, which is included in the first type carrier, and/or a second reference signal, which is included in the second type carrier.
Abstract:
The invention is related to a wireless communication by user equipment (UE) based on capability of the UE. According to this application, signals are received on a downlink channel including a downlink control channel and a downlink data channel, a parameter is configured for the wireless communication based on the capability of the UE and information in the downlink control channel, and signals are transmitted on a uplink channel based on the configured parameter, wherein the signals are transmitted to at least two cells.
Abstract:
The present invention related to a method and an apparatus for enhancing coverage of an UE. The method comprising receiving a signal, wherein a control signal is received on a downlink control channel with a repeated transmission based on the reception coverage of the UE, and transmitting a control signal on an uplink control channel.
Abstract:
According to one disclosure in the present specification, a receiving method for a user device in a small-scale cell is provided. The receiving method may include: a step of monitoring a plurality of candidate control channels within a search space for a serving cell; and a step of acquiring downlink control information (DCI) by decoding the plurality of candidate control channels. The DCI can include a resource block assignment field, and the resource block assignment field can include information about virtual system bandwidth in the downlink system bandwidth. The receiving method may include a step of receiving a data channel over multiple subframes, based on the virtual system bandwidth.
Abstract:
The present invention relates to a wireless access system, and provides methods for transmitting downlink data with a new carrier type (NCT) by using transmission diversity and devices for supporting same. According to one embodiment of the present invention, a method for user equipment receiving downlink data in the wireless access system supporting the new carrier type (NCT) comprises the steps of: receiving an upper layer signal comprising indication information indicating demodulation of downlink data into a user equipment-specific reference signal (URS), wherein the downlink data is transmitted by means of a distributed virtual resource block (DVRB) technique; receiving the downlink data and the URS transmitted using the DVRB technique by applying different precoding matrices to a first slot and a second slot in a subframe; demodulating the URS and estimating channel information with respect to the first slot and the second slot; and demodulating downlink data based on the channel information.
Abstract:
The present invention relates to various methods for performing quasi co-location (QCL) and apparatuses supporting the same. As an embodiment of the present invention, a method for performing quasi co-location (QCL) for a new carrier type (NCT) by a terminal in a wireless access system may include the steps of: receiving a higher layer signal including a QCL reference CRS information parameter indicating CRS information of a reference carrier; receiving a physical downlink control channel (PDCCH) signal including a PDSCH remapping and quasi co-location indicator (PQI) field; receiving a CSI-RS of a QCLed NCT and a CRS of a reference carrier on the basis of a PQI field and a QCL reference CRS information parameter; and performing frequency tracking of the NCT and the reference carrier on the basis of the CSI-RS of the NCT and the CRS of the reference carrier.