Abstract: A method for receiving uplink control information in a wireless communication system supporting carrier aggregation (CA), and a base station therefore are discussed. The method according to one embodiment includes transmitting downlink data through a first downlink component carrier (DL CC) or a second DL CC; receiving an acknowledgement/not-acknowledgement (ACK/NACK); and receiving periodic channel state information (CSI). If the ACK/NACK collides with the periodic CSI and the ACK/NACK corresponds to downlink data transmitted through only the first DL CC, both the ACK/NACK and the periodic CSI are received in the same subframe of a first uplink component carrier (UL CC). If the ACK/NACK collides with the periodic CSI and the ACK/NACK corresponds to downlink data transmitted through both the first DL CC and the second DL CC, the periodic CSI is not received and only the ACK/NACK is received in the same subframe of the first UL CC.

Abstract: A method and a user equipment (UE) for receiving a power headroom report in a wireless access system that supports a carrier aggregation are discussed. The method according to an embodiment includes transmitting by an eNB to a UE an uplink transmission grant allocating uplink resources on a predetermined subframe in an anchor uplink component carrier (UL CC); and receiving the power headroom report by the eNB from the UE. The power headroom report includes a power headroom value for the anchor UL CC, when the eNB has configured the UE for a simultaneous physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission. The method further includes reporting the power headroom value to a base station. The power headroom value is calculated.

Abstract: Provided are a method and an apparatus for transmitting uplink control information performed by a user equipment in a wireless communication system. The method comprises the steps of: receiving a first parameter for indicating whether to simultaneously transmit a first combination of an acknowledgement/negative-acknowledgement (ACK/NACK) and a channel quality indicator (CQI), and a second parameter for indicating whether to multiplex a second combination of an ACK/NACK and the CQI and transmitting same as a second physical uplink control channel (PUCCH) format; and multiplexing the first combination of the ACK/NACK or the second combination of ACK/NACK with the CQI and transmitting same as a first PUCCH format or the second PUCCH format, based on the first parameter and the second parameter.

Abstract: Provided are a method and an apparatus for a user equipment, which is allocated a plurality of serving cells, receiving acknowledgement/negative acknowledgement (ACK/NACK) in a wireless communication system. The method comprises: transmitting uplink data through a physical uplink shared channel (PUSCH); and receiving ACK/NACK with respect to the uplink through a physical hybrid-ARQ indicator channel (PHICH), wherein a serving cell that receives the ACK/NACK is selected from one or more serving cells, which the user equipment monitors to detect an uplink grant that schedules the PUSCH.

Abstract: The present invention relates to a method and apparatus for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) signal in a wireless communication system. The method includes the steps of: receiving a transmission block; and transmitting an ACK/NACK signal for the transmission block in a first subframe or a second subframe according to the size of the transmission block, wherein, when the size of the transmission block is smaller than or equal to a reference value, the ACK/NACK signal is transmitted in the first frame, when the size of the transmission block is greater than the reference value, the ACK/NACK signal is transmitted in the second subframe, and the second subframe is behind the first subframe in a time domain.

Abstract: A method for transmitting an uplink signal by a user equipment (UE) in a wireless communication system, and the UE therefore are discussed. The method according to one embodiment includes receiving, by the UE, control information through a physical downlink control channel (PDCCH); determining, by the UE, a physical uplink control channel (PUCCH) resource by adding a first index offset and a second index offset to a lowest index of one or more resource units used for the PDCCH, the first index offset being signaled through the PDCCH and the second index offset being signaled through higher layer signaling; and transmitting, by the UE, acknowledgment/negative-acknowledgment (ACK/NACK) information using the PUCCH resource.

Abstract: Provided are a communication method and a wireless device in a time division duplex (TDD)-based wireless communication system. A wireless device receives a setting for a first special (S) subframe of a first cell to which a first timing advance (TA) is applied and a setting for a second S subframe of a second cell to which a second TA is applied. When a downlink (DL) reception and an uplink (UL) transmission are duplicated, the wireless device varies at least one of the settings among the first S subframe and second S subframe.

Abstract: Provided are a method for setting a starting position in a time domain of a data channel in a wireless communication system and a device using the method thereof. The method comprises the steps of: receiving position information notifying the position at which data channels start in a plurality of subframes; receiving a control channel in a first downlink subframe; and receiving at least one data channel scheduled by the control channel in the plurality of the downlink subframes, wherein the position at which the data channel starts in the plurality of the downlink subframes is determined on the basis of the position information.

Abstract: A method is provided for transmitting an acknowledgement/negative-acknowledgement (ACK/NACK) in a wireless communication system based on Time Division Duplex (TDD) in which M downlink subframe(s) are associated with an uplink subframe, where M is equal to or greater than one (1). A user equipment, configured with a plurality of serving cells, receives at least one downlink transport block in the M downlink subframe(s), and determines an ACK/NACK response for the at least one downlink transport block by using one of a plurality of pre-defined mapping rules. Each of the plurality of pre-defined mapping rules is set to define a mapping relation between M ACK/NACK state(s) for each of the plurality of serving cells and the ACK/NACK response based on M. The user equipment transmits the ACK/NACK response.

Abstract: A user equipment (UE) is provided for transmitting an uplink signal in a wireless communication system The UE sets up a sounding reference signal (SRS) configuration for a first serving cell that includes information for an SRS transmission, and determines an SRS subframe in which an SRS and a physical uplink shared channel (PUSCH) for the first serving cell are simultaneously triggered according to the SRS configuration. If a SRS transmission on the SRS subframe for the first serving cell is overlapped with an uplink transmission for a second serving cell, the UE transmits the SRS in the SRS subframe if a total uplink transmission power does not exceeds the UE's maximum transmit power on the overlapped portion. If the SRS is triggered by the SRS configuration and timing advance groups are configured to the UE, the UE transmits the PUSCH on the SRS subframe for the first serving cell.

Abstract: A method, a user equipment, and a base station for maintaining uplink synchronization in a wireless communication system supporting carrier aggregation are discussed. The method of maintaining uplink synchronization at a user equipment according to an embodiment includes receiving a physical downlink control channel (PDCCH) order. The PDCCH order indicates an initiation of a random access procedure and includes a carrier indicator field and a predefined set of values of a 1-bit flag indicating a localized/distributed resource block assignment, and a resource block assignment field. The method further includes transmitting a random access preamble through an uplink component carrier corresponding to a value of the carrier indicator field among a plurality of uplink component carriers.

Abstract: Provided are a method and a device for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) of a terminal which is set with a plurality of serving cells. The method comprises the steps of: receiving data in a subframe n of a second serving cell; and transmitting an ACK/NACK signal for the data in a subframe n+kSCC(n) of a first serving cell connected to the subframe n of the second serving cell, wherein the first serving cell is a primary cell for the terminal to execute an initial connection establishment procedure or a connection reestablishment procedure, and uses a frequency division duplex (FDD) wireless frame, the second serving cell is a secondary cell allocated to the terminal in addition to the primary cell, and uses a time division duplex (TDD) wireless frame, and the kSCC(n) is a previously determined value.

Abstract: A method and apparatus for transmitting control information are discussed. The method can include generating uplink control information (UCI) and transmitting the UCI through an physical uplink control channel (PUCCH) in a subframe, wherein when the subframe is configured for transmission of a scheduling request (SR) and when transmission of a hybrid automatic repeat request (HARD)-acknowledgement (ACK) coincides with the subframe, transmission power of the PUCCH is determined based on a number of HARQ-ACK information bits and a SR bit. A value of the SR bit can be determined by whether or not the subframe is configured for a scheduling request.

Abstract: Provided are a method and an apparatus for transmitting uplink control information (UCI), which is carried out by a terminal in a wireless communication system. If the number of information bits of the UCI falls inside a specific range when different types of UCI are transmitted through the same PUCCH format, a bit sequence of each of the UCI are channel-coded by aligning/interleaving, wherein the aligning/interleaving is carried out so that the UCI having high importance are channel-coded so as to have better decoding performance.

Abstract: A communication method in a wireless communication system, the method includes receiving a first control channel including first scheduling information on a first physical downlink shared channel (PDSCH); receiving a second control channel including second scheduling information on a second PDSCH; determining whether the first PDSCH and the second PDSCH are scheduled to be overlapped on at least one subframe; and determining which one of the first PDSCH and the second PDSCH is to be received on the at least one overlapped subframe.

Abstract: Provided are a method and apparatus for uplink transmission in a wireless communication system. A terminal sets an uplink transmission mode for a plurality of component carriers, multiplexes an uplink transport block and uplink control information in accordance with the uplink transmission mode, and transmits the multiplexed control information through one of the plurality of component carriers on an uplink channel.

Abstract: A method for transmitting channel status information of a user equipment (UE) in a wireless communication system. The UE reports first channel information to a base station periodically; and reports second channel information to the base station periodically. The first channel information and the second channel information are pieces of information combined to indicate one precoding matrix. The second channel information reported in a specific subframe is calculated based on last reported first channel information. A channel quality indicator (CQI) reported in the specific subframe is calculated based on one precoding matrix indicated by the last reported first channel information and the second channel information reported in the specific subframe.

Abstract: A method and a user equipment for controlling an uplink transmission at in a wireless communications system are discussed, the user equipment being configured with multiple component carriers. The method according to an embodiment includes receiving, from a base station, Radio Resource Control (RRC) configuration information for a channel status information report; and performing a procedure for periodically transmitting channel status information to the base station. If the corresponding downlink component carrier is in an active state at a time for transmitting the channel status information, a transmission of the channel status information report is performed at the time. If the corresponding downlink component carrier is in a non-active state at a time for transmitting the channel status information report, the transmission of the channel status information report is skipped at the time. Signal reception is limited by the user equipment on a downlink component carrier in the non-active state.

Abstract: A method for configuring an acknowledgement for hybrid automatic repeat request (HARQ), and a user equipment therefore are discussed. The method according to one embodiment includes receiving downlink data through one of first and second downlink component carriers; and determining a resource used for a physical uplink control channel (PUCCH). The resource used for the PUCCH is determined based on a downlink component carrier. If downlink data is received through the first downlink component carrier, the resource used for the PUCCH is determined by using a control channel element (CCE) of a physical downlink control channel (PDCCH). If the downlink data is received through the second downlink component carrier, the resource used for the PUCCH is determined by using a radio resource control (RRC) message. The method according to the embodiment further includes transmitting an acknowledgement (ACK)/negative-acknowledgement (NACK) signal for the downlink data using the resource used for the PUCCH.

Abstract: The present invention relates to a method for controlling uplink transmission power and to a wireless device using same in a wireless communication system. The wireless device receives determines uplink transmission power in consideration of the overlap period between subframes between a first serving cell belonging to a first timing advance (TA) group and a second serving cell belonging to the second TA group, and transmits an uplink channel on the basis of the uplink transmission power.