Abstract: A method and an apparatus for transmitting a reference signal in a wireless communication system are provided. A first base station maps a first reference signal to a resource region and transmits the first reference signal to a user equipment. A second base station maps a second reference signal to said resource region and transmits the second reference signal to said user equipment. The resource elements, to which the first reference signal and the second reference signal are mapped in the resource region, are determined in accordance with the index on a Latin square matrix occupied by two different elements, respectively, from among N elements constituting the Latin square matrix with a size of N×N.

Abstract: The present invention relates to transmission and reception of a frame for a legacy support mode of IEEE 802.16m system for supporting a legacy system. A method of transmitting an uplink signal, in which a signal is transmitted by a user equipment in a wireless mobile communication system, according to the present invention includes the step of transmitting the signal from the user equipment, wherein the signal is transmitted via an uplink frame including 15 OFDMA (orthogonal frequency division multiple access) symbols and wherein the uplink frame comprises a first uplink subframe including 9 OFDMA symbols and a second uplink subframe including 6 OFDMA symbols. Preferably, the user equipment is multiplexed with a second user equipment supporting a legacy system for the wireless mobile communication system only by FDM for an uplink.

Abstract: A method for receiving data by a relay station (RS) in a wireless communication system includes: receiving radio resource allocation information via an R-PDCCH (R-Physical Downlink Control Channel); and receiving data from a base station (BS) via an R-PDSCH (R-Physical Downlink Shared Channel) indicated by the radio resource allocation information, wherein the radio resource allocation information includes information regarding an allocation of resource blocks in a frequency domain and information regarding an allocation of OFDM symbols in a time domain. Since the radio resource allocation information providing information regarding a time relationship between a control channel transmitted by the BS to a UE and a control channel transmitted by the RS to a UE connected to the RS is provided, the RS can reliably receive a signal transmitted from the BS in a backhaul link between the BS and the RS in a wireless communication system including the RS.

Abstract: The invention relates to a method for transmitting an uplink signal and feedback information of a relay, and to a relay apparatus using the method. The relay can receive information, constituting a downlink backhaul subframe and an uplink backhaul subframe from a base station. The relay can transmit an uplink signal via the relevant uplink backhaul subframe on the basis of the received information constituting the uplink backhaul frame. Further, the relay can receive a downlink reference signal from the base station, measure the status of a channel, and transmit the status of the channel in values, in various formats and in various points in time and cycles, to the base station.

Abstract: A method and an apparatus for reporting a channel state in a multi-carrier system are provided. User equipment receives an uplink grant including an uplink resource allocation and a channel quality indicator (CQI) request via one downlink carrier from among a plurality of downlink carriers. The user equipment reports CQIs for the plurality of downlink carriers via a plurality of subframes in accordance with the CQI request.

Abstract: A method for allocating resource to ACK (Acknowledgment)/NACK (Negative-ACK) transmission in a wireless communication system is disclosed. The method includes receiving scheduling information included in a plurality of downlink control channels and data included in a plurality of downlink data channels, over multiple downlink component carriers from a base station, determining ACK/NACK responses corresponding to the data, and allocating resource to the ACK/NACK responses based on the scheduling information corresponding to each of the plurality of downlink control channels and downlink component carrier-dependent offset values.

Abstract: A method for processing and transmitting data packet is disclosed. The method includes receiving a data packet with a first Redundancy Version (RV) from a serving cell, receiving a data packet with a second RV different from the first RV from a collaborative cell, and combining and decoding the data packets received from the serving cell and the collaborative cell.

Abstract: A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A transmitter generates the reference signal, maps the reference signal to a resource region, and transmits the reference signal, mapped to the resource region, to a user equipment (UE). The resource region to which the reference signal is mapped is determined based on at least one of a hybrid automatic repeat request (HARQ) processing time for backhaul link transmission, a position of a backhaul link sub-frame, and a transmission period of the reference signal.

Abstract: The method for switching operating carrier at a user equipment is disclosed. In aspect of the present invention, the user equipment receive target carrier information indicating a target carrier of the UE and target carrier transition time information indicating a time difference between receiving timing of transition indication and transition completion timing from an base station. And the UE may switch from a current operating carrier to the indicated target carrier based on the received the target carrier transition time information and the target carrier information. In case that the target carrier information and the target carrier transition time information is transmitted via a high layer signaling, the UE may transmit ACK/NACK confirm signal indicating whether the target carrier transition time information and the target carrier information is received without error via on the target carrier and the current operating carrier to the base station.

Abstract: A method of transmitting a signal of a mobile station that performs communication with a plurality of cells in a wireless communication system comprises transmitting a control signal or a data signal through an asynchronous channel to a neighboring cell which is not synchronized with the mobile station, the asynchronous channel including cyclic prefix and guard time.

Abstract: A user equipment in wireless communication system is provided. The user equipment includes an antenna unit including a plurality of antennas, a control unit for grouping the plurality of antennas into a predetermined number of antenna groups and controlling separately transmission power of each of the predetermined number of antenna groups, and a transmitting unit, connected to the control unit, for transmitting at least one of data and control information to a base station via at least one of the predetermined number of antenna groups.

Abstract: Provided are a device and method supporting multi-carrier waves. The device comprises: a multi-carrier control unit for receiving carrier wave allocation data including data relating to allocated carrier waves and deactivating a portion of the carrier waves included in the carrier wave allocation data or else receiving carrier wave control data including data relating to additional carrier waves; and a multi-carrier operation unit which operates using multiple carrier waves allocated on the basis of the carrier wave allocation data and the carrier wave control data. The base station scheduling burden can be reduced and the power consumption of the terminal can be reduced.

Abstract: A method of performing hybrid automatic repeat request (HARQ) of a user equipment (UE) in a multiple-carrier system is provided. The UE transmits uplink data on an uplink carrier. The UE receives acknowledgement (ACK)/not-acknowledgement (NACK) for the uplink data on a downlink carrier associated with the uplink carrier. Accordingly, HARQ can be supported in a multiple-carrier system.

Abstract: A method of transmitting data in a wireless communication is disclosed, by which timing error can be solved in a multi-cell environment. The present invention, in which data is transmitted by a serving cell to a mobile station communicating with a plurality of cells in a wireless communication system, includes receiving information on delay times of signals from the mobile station, wherein the signals are received by the mobile station from the plurality of the cells and transmitting data to the mobile station by inserting a cyclic prefix (CP) having a length determined according to the information on the delay times into the data.

Abstract: The present invention relates to a method and an apparatus for data communication through a Coordinated Multi-Point Transmission in a multiple cell environment. According to the present invention, the data communication method through a coordinated multi-point transmission in a multiple cell environment including a serving base station and a cooperative base station for performing a coordinated multi-point transmission comprises the steps of: receiving data from the serving base station and the cooperative base station through a downlink channel; and demodulating the received data. Each datum transmitted from the serving base station and the cooperative base station includes a predetermined Reference Signal and a data Resource Element, and a Transmit Diversity is applied to the data resource elements of both the serving base station and the cooperative base station through Pairing.

Abstract: The present invention relates to a method and device for reducing the level of blind decoding complexity when detecting a control channel in a broadband wireless access system supporting multicarrier operation. Examples of the present invention disclose methods for the effective blind decoding of a control channel using an explicit method and implicit methods when sending a control channel based on multicarrier operation as with a control channel for transmitting downlink or uplink allocation information under carrier aggregation conditions.

Abstract: A method and apparatus of transmitting data in a Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframe in a wireless communication system is provided. A base station (BS) transmits a physical downlink control channel (PDCCH) to a user equipment in a first orthogonal frequency division multiplexing (OFDM) symbol, transmits reference signals for a plurality of extended antenna ports to the user equipment in a second OFDM symbol by mapping the reference signals to subcarriers, and transmits a physical downlink shared channel (PDSCH) to the user equipment in the second OFDM symbol by mapping the PDSCH to the remaining subcarriers other than the subcarriers to which the reference signals are mapped.

Abstract: A method of transmitting channel quality information in a wireless communication system is disclosed. The method of transmitting channel quality information from a mobile station in a wireless communication system includes generating channel quality information of a downlink multi carrier including N number of downlink component carriers; and transmitting the generated channel quality information to a base station through at least one of a physical uplink control channel (PUCCH) a physical uplink shared channel (PUSCH) on a single uplink component carrier.

Abstract: A wireless device and method for a multiple carrier system are provided. The wireless device comprises a carrier management unit for determining at least one of a plurality of carriers as a reference carrier for monitoring a control channel and a control channel unit for monitoring the control channel over the reference carrier, wherein the carrier management unit switches the reference carrier to at least one of remaining carriers of the plurality of carriers. Accordingly, control channel traffic can be prevented from concentrating on a particular carrier, and a diversity gain can be achieved.

Abstract: The present system relates to a method for transmitting control information in a wireless communications system that supports coordinated multi-point (CoMP) including N (N>1) transmission points. The method comprises: generating control information for downlink transmission of the N transmission points; and transmitting the generated control information to a user device, wherein the control information contains a control information region for transmission of intrinsic control information on a reference transmission point among the N transmission points, and N?1 control information regions for transmission of intrinsic control information on the N?1 transmission points.