Abstract: A method is provided for receiving a downlink signal at a downlink reception entity in a wireless communication system. Downlink control information is received by demodulating a Physical Downlink Control Channel (PDCCH) in a first resource block (RB) pair within an RB bundle by using a first Demodulation Reference Signal (DMRS). Downlink data is received by demodulating a Physical Downlink Shared Channel (PDSCH) in one or more second RB pairs scheduled by the downlink control information within the RB bundle by using a second DMRS based on an assumption that a same precoder is applied to the scheduled one or more second RB pairs.

Abstract: The present invention relates to a method and to an apparatus for transmitting/receiving data in a relay communication system. The method comprises the steps of: setting, as a guard band, the first predetermined number of symbol transmission slots of a data transmission period in a subframe resource element of a downlink channel constituted by a control signal transmission period to which a control signal is allocated and the data transmission period to which downlink data is allocated; allocating reference signals to symbols of the data transmission period; puncturing the symbols corresponding to the guard band from among the symbols to which said reference signals are allocated; and transmitting signals to which said reference signals are allocated.

Abstract: A method is provided for performing a hybrid automatic repeat request (HARQ) by a user equipment (UE). An uplink (UL) grant for a first subframe of a second serving cell is received through a first serving cell. UL data in the first subframe of the second serving cell is transmitted according to the UL grant. When a not-acknowledgement (NACK) for the UL data is received through a physical HARQ indicator channel (PHICH) in a subframe i of the first serving cell, the UE performs a non-adaptive retransmission for the UL data in a second subframe of the second serving cell. When a PHICH resource corresponding to the UL data is not present in the subframe i, the UE does not perform the non-adaptive retransmission in the second subframe of the second serving cell.

Abstract: The present invention relates to a method for configuring a starting position of a control channel in a wireless communication system, and a terminal using the same. The method includes receiving duration information about a physical downlink control channel from the first orthogonal frequency division multiplexing (OFDM) symbol of a downlink subframe; and configuring a first OFDM symbol after OFDM symbols indicated by the duration information, as a starting point of an enhanced-physical downlink control channel. The downlink subframe includes a plurality of subcarriers in a frequency domain and 12 or 14 OFDM symbols in a time domain. The PDCCH includes the first N (N is a natural number of from 1 to 4) number of OFDM symbols of the downlink subframe. The duration information indicates the N number of OFDM symbols. The E-PDCCH comprises the starting point to the last OFDM symbol of the downlink subframe.

Abstract: The present invention relates to a data transmission/receiving method and apparatus in a relay communication system. In particular, the data transmission/receiving method through a backhaul link between a base station and a relay node in a relay communication system comprises: composing a backhaul subframe including a control signal transmission period to which a control signal is allocated and a backhaul signal transmission period to which a backhaul signal is allocated and then allocating the backhaul signal; transmitting configuration information about the backhaul subframe, the information containing symbol position or size data of the backhaul signal transmission period, to the relay node through an upper layer signal; and transmitting the backhaul signal having been allocated through the backhaul subframe to the relay node.

Abstract: A method and apparatus for transmitting reference signals in a relay communication system are provided. The method transmits reference signals via a type 2 relay node in a relay communication system and includes a base station (BS) allocating a plurality of antenna ports in a mutually exclusive manner so that the antenna port of the BS and the antenna port of a peripheral relay node do not overlap each other, the BS and relay node transmitting reference signals to a user equipment (UE) via the corresponding antenna ports that are mutually exclusively allocated and the BS receiving channel state information from the UE to obtain channel state information between the BS and the UE and channel state information between the relay node and the UE.

Abstract: A method is provided for receiving a downlink signal at a downlink reception entity in a wireless communication system. Downlink control information is received by demodulating a Physical Downlink Control Channel (PDCCH) in a first resource block (RB) pair within an RB bundle by using a first Demodulation Reference Signal (DMRS) in the first RB pair. Further, downlink data is received by demodulating a Physical Downlink Shared Channel (PDSCH) in one or more second RB pairs within the RB bundle by using a second DMRS in the one or more second RB pairs. The second DMRS is used based on an assumption that a same precoder is applied to the one or more second RB pairs.

Abstract: A method of decoding a backhaul downlink signal is presented. A relay node (RN) receives a higher layer signal indicating a maximum transmission rank from a base station (BS), receives control information containing a resource allocation for downlink data through a relay control channel from the BS, demodulates the control information, and receives the downlink data through a data channel based on the control information. The control information is mapped to resource elements (REs) which do not overlap with user equipment-specific reference signal (URS) REs in a control region which is used for the relay control channel transmission of the BS. The URS REs are reserved REs for URSs according to the maximum transmission rank.

Abstract: A method for a base station (BS) to perform a hybrid automatic repeat request (HARQ). The BS transmits an uplink (UL) grant for a first subframe of a second serving cell through a first serving cell. The BS receives UL data based on the UL grant in the first subframe, transmits an acknowledgement/non-acknowledgement (ACK/NACK) for the UL data through a physical HARQ indicator channel (PHICH) in subframe i of the first serving cell and receives non-adaptively retransmitted UL data in a second subframe of the second serving cell if a NACK for the UL data has been transmitted through the PHICH in the subframe i of the first serving cell. The first serving cell and the second serving cell use different UL-DL configurations.

Abstract: A method of transmitting a signal, performed by a base station, in a wireless communication system. The method according to one embodiment includes transmitting a backhaul downlink signal to a relay station through a backhaul downlink transmission subframe. The backhaul downlink transmission subframe includes 14 orthogonal frequency division multiplexing (OFDM) symbols and the 14 OFDM symbols are indexed 0 to 13. An access downlink transmission subframe, used by the relay station to transmit a signal to a user equipment, and the backhaul downlink transmission subframe are transmitted with a time aligned subframe boundary, and OFDM symbols having indices K to 12 are used for transmitting the backhaul downlink signal, where K is a natural number and 1?K?3.

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: A wireless communication system is disclosed. A method and apparatus for allowing a user equipment (UE) to transmit uplink control information through a physical uplink shared channel (PUSCH) are disclosed.

Abstract: A method is provided for operating a relay station (RS) in a wireless communication system based on time division duplex (TDD) using a radio frame composed of a plurality of downlink subframes and at least one uplink subframe. A pair of subframes is determined to be used for communication between a base station (BS) and the RS. The pair of subframes comprises a configured downlink subframe and a configured uplink subframe. A signal is received from the BS in the configured downlink subframe which is configured by the RS as a multicast/broadcast single frequency network (MBSFN) subframe, and a signal is transmitted to the BS in the configured uplink subframe.

Abstract: Provided is a data receiving method in a wireless communication system and a wireless device using the same. A wireless device monitors a downlink control channel, and receives a downlink reference signal to be used in a demodulation of a downlink transmission block based on the resource to be used in the monitoring the downlink control channel.

Abstract: A wireless communication system is disclosed. A method and apparatus for allowing a user equipment (UE) to transmit uplink control information through a physical uplink shared channel (PUSCH) are disclosed. A method for allowing a UE to transmit uplink control information through a PUSCH in a wireless communication system includes receiving configuration information about a plurality of PUSCH feedback modes, identifying information indicating a specific PUSCH feedback mode for the PUSCH by using uplink allocation information for the PUSCH, and transmitting the uplink control information through the PUSCH in accordance with the specific PUSCH feedback mode.

Abstract: A signal transmission method using a multicast broadcast single frequency network (MBSFN) subframe in a radio communication system is provided. The method includes: selecting a plurality of relay stations for transmitting a plurality of backhaul signals, and transmitting the plurality of backhaul signals to the selected respective relay stations by using different radio resources, wherein each of the selected relay stations configures a subframe for receiving each of the plurality of backhaul signals as the MBSFN subframe. Accordingly, the backhaul signal can be transmitted between the base station and the plurality of relay stations by effectively using the radio resources.

Abstract: A communication method in a wireless communication system, and a wireless device therefore are discussed. The method according to one embodiment includes receiving a first control channel including first scheduling information on a first physical downlink shared channel (PDSCH) to be received in a first subframe; receiving a second control channel including second scheduling information on a second PDSCH to be received in a second subframe; determining whether the first subframe in which the first PDSCH is to be received is overlapped with the second subframe in which the second PDSCH is to be received; and if the first subframe is determined as being overlapped with the second subframe, determining a valid subframe for receiving at least one of the first PDSCH and the second PDSCH.

Abstract: An apparatus and method for transmitting channel state information in a wireless communication system are disclosed. The UE apparatus for transmitting channel state information includes a channel state measurement module for measuring a channel state based on a level of interference received from a neighbor cell, a channel state information generation module for generating channel state information for a plurality of resource regions or for periodic and aperiodic channel state information reporting modes using the measured channel state and offsets received from a serving BS, the offsets being set for the plurality of resource regions or the periodic and aperiodic channel state information reporting modes, and a transmission module for transmitting the generated channel state information to the serving BS.

Abstract: Provided are a method and an apparatus for monitoring a control channel in a sub-frame including a plurality of orthogonal frequency division multiplexings (OFDMs) in a time division duplex (TDD)-based wireless communication system. A wireless device monitors a downlink control channel in at least one OFDM symbol after an OFDM symbol receives a primary synchronization signal (PSS) in the sub-frame.

Abstract: A method and a base station (BS) for transmitting a signal, and method and a relay for receiving a signal in a wireless communication system are discussed. The method for transmitting a signal according to an embodiment includes mapping a reference signal to a subframe comprising a first slot and a second slot. Each of the first and second slots includes a plurality of resource elements over which the reference signal is allowed to be mapped. When a last orthogonal frequency division multiplexing (OFDM) symbol of the subframe is not available for a BS-to-relay transmission, the reference signal is not mapped to the second slot and a data signal is mapped to the resource elements of a penultimate OFDM symbol of the second slot. The method further includes transmitting the reference signal to a relay.