Abstract:
Provided is a method for transmitting an ACK/NACK signal by a user equipment (UE) in a wireless communication system, comprising: detecting control channels in a downlink subframe of a radio frame, wherein ACK/NACK signal for the detected control channels is transmitted in an uplink resource region; determining whether uplink (UL) transmission (Tx) power control values received at respective one of the detected control channels are used as values indicating a resource region for transmission of the ACK/NACK signal, and transmitting the ACK/NACK signal in an uplink resource region decided according to the result of the determining; and if all UL Tx power control values received at the respective one of the detected control channels are not used to indicate the resource region for transmission of the ACK/NACK signal, transmitting the ACK/NACK signal in an uplink resource region linked to the respective one of the detected control channels.
Abstract:
The present invention relates to a method for a terminal to transceive a signal through a base station and a predetermined carrier in a time division duplex (TDD) communication system. In detail, the method includes the steps of: receiving, from the base station, information on dynamically changeable uplink/downlink subframe settings; selecting a representative uplink/downlink subframe setting from among the uplink/downlink subframe settings; and performing a hybrid automatic repeat request (HARQ) operation according to the representative uplink/downlink subframe setting.
Abstract:
A method for receiving downlink data in a wireless communication system is provided. A user equipment receives downlink control information via a downlink control channel in a subframe. The downlink control information includes reference signal (RS) information and physical downlink shared channel (PDSCH) information. The RS information indicates transmission antenna ports, a scrambling identity and a number of transmission layers. The user equipment receives a RS for demodulating a PDSCH based on the RS information in the subframe. The RS is generated based on the scrambling identity. The user equipment receives downlink data via the PDSCH in the subframe. Resource element (RE) mapping information on REs assigned for the PDSCH is determined based on the PDSCH information.
Abstract:
The present invention relates to a method to receive an enhanced physical downlink control channel (EPDCCH) in a wireless communication system. More particularly, the method includes monitoring at least one EPDCCH candidate consisting of one or more enhanced control channel elements (ECCEs) in resource blocks and receiving the EPDCCH, wherein the number of ECCEs forming each of the one or more EPDCCH candidates corresponds to an aggregation level, the number of the EPDCCH candidates is set based on the number of ECCEs for each resource block and the number of resource blocks, and, when the number of resource blocks is a first value and the number of ECCEs for each resource block is a second value, the number of EPDCCH candidates in a specific aggregation level is set as a value obtained by dividing the total number of ECCEs by the specific aggregation level.
Abstract:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a time division duplex (TDD)-based wireless communication system. The method comprises the steps of receiving scheduling information for data transmission in a first uplink subframe, and transmitting uplink data based on the scheduling information. The uplink data transmission period includes the first uplink subframe, and further includes, if the second subframe immediately before the first uplink subframe is a subframe including a downlink period, a guard period and an uplink period, and if a predetermined condition is satisfied, an uplink period of a second subframe.
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:
A method and apparatus of transmitting and receiving data is provided. A user equipment receives physical downlink shared channel data on a PDSCH in a second subframe from a second serving cell to the user equipment. The second serving cell is activated by the first serving cell, and the second serving cell does not map the PDSCH data to a second RE corresponding to a first resource element of the first subframe mapped with the CRS. The CRS is generated from a pseudo random sequence that is initiated by a cell identifier of the first serving cell and the PDSCH is indicated by an enhanced physical downlink shared channel of the second subframe, and the second RE of the second subframe and the first RE of the first subframe overlap in a time domain and in a frequency domain.
Abstract:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal in a wireless communication system supporting carrier aggregation (CA), and to an apparatus for same, comprising the steps of: establishing a first cell having a first time division duplex (TDD) uplink-downlink (UL-DL) configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception reply information with respect to the data through a UL subframe of the second cell.
Abstract:
A method for transmitting data for a half-duplex device in a wireless communication system is provided. The half-duplex device receives first downlink control information from a base station in a first subframe. The half-duplex device transmits uplink data to the base station in a second subframe. The first downlink control information includes a resource through which the uplink data is transmitted and information on the second subframe.
Abstract:
Provided are a method for transmitting uplink control information by a user equipment in a wireless communication system and a user equipment using the method. The method comprises the steps of: setting subframes for transmitting periodic channel state information (CSI); and transmitting the periodic CSI from the subframes, wherein a first resource or a second resource is used depending on a combination of acknowledgement/negative-acknowledgement (ACK/NACK) which can be transmitted from the subframes.