Abstract: A method for transmitting and receiving a signal by a terminal a wireless communication system is disclosed in the present invention. More particularly, the method comprises the steps of: receiving an indicator for changing the usage of a specific subframe corresponding to a sub-component carrier from a network; determining whether near-end crosstalk between the sub-component carrier and another component carrier occurs if the usage of the subframe is changed according to the indicator; and transmitting and receiving a signal to and from the network through the sub-component carrier according to the changed usage if it is determined that the near-end crosstalk does not occur.

Abstract: The present invention relates to a method for a first terminal to report channel state information (CSI) in a wireless communication system, the method comprising the steps of: receiving, from a base station, an allocation of a group CSI report setting associated with a terminal group including the first terminal; broadcasting the group CSI report setting to the terminal group; and reporting group CSI to the base station, wherein the terminal group consists of the first terminal and at least one second terminal, and the group CSI report setting defines, as the group CSI, the CSI of the first terminal corresponding to a part of the CSI about each of a plurality of terminals constituting the terminal group.

Abstract: A method for receiving an EPDCCH (enhanced physical downlink control channel) by a user equipment (UE) in a wireless communication system, the method includes receiving an EPDCCH configuration including resource parameters related with a PDSCH (physical downlink shared channel) via a RRC(Radio Resource Control) signaling; and monitoring a search space to decode the EPDCCH from a starting OFDM (Orthogonal Frequency Division Multiplexing) symbol for the EPDCCH in a resource block set for the EPDCCH, according to the resource parameters related with the PDSCH, wherein if the UE is configured to associate with multiple transmission points, the starting OFDM symbol for the EPDCCH is set according to the resource parameters related with the PDSCH.

Abstract: The present invention relates to a method and a device for reselecting a synchronization signal in a wireless communication system supporting device-to-device direct communication and the method includes: receiving a first synchronization signal from a second UE and receiving a second synchronization signal from a third UE; comparing a first reception power level indicating reception power of the first synchronization signal and a second reception power level indicating the reception power of a second synchronization signal with a first threshold value indicating minimum reception power; and selecting the first synchronization signal or the second synchronization signal according to the comparison result, and the synchronization signal is a synchronization signal selected in the previously synchronization procedure.

Abstract: According to an embodiment of the present invention, a method for transmitting and receiving a signal in a wireless communications system includes the steps of: transmitting an uplink data in a first subframe to a base station; and receiving a reception confirmation response to the uplink data on a downlink time-frequency resource of a second subframe associated with the first subframe, wherein if the second subframe transmits a shortened DMRS (Demodulation Reference Signal), the downlink time-frequency resource is included in at least a part of REs (Resource Elements) adjacent to the RE (Resource Element) transmitting the shortened DMRS, and the RE transmitting the shortened DMRS is the cell specified one of the REs capable of being reserved for the DMRS.

Abstract: One embodiment of the present invention relates to a method by which a base station transmits control information through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system, and the control information transmission method comprises the steps of: mapping control information to an enhanced resource-element group (EREG) allocated to transmit the EPDCCH in a first EPDCCH physical resource block (PRB) set and a second EPDCCH PRB set, respectively; and transmitting the mapped control information, wherein an enhanced control channel element (ECCE) index corresponding to the EREG of the same position is connected with the same physical uplink control channel resource (PUCCH) in the first EPDCCH PRB set and the second EPDCCH PRB set, respectively.

Abstract: Provided are a discovery signal transmission method of a terminal supporting device-to-device (D2D) communication and a terminal device using such a method. The method comprises: directly receiving information on a specific discovery signal (DS) transmission mask or receiving discovery signal configuring information; selecting the specific DS transmission mask or one DS transmission mask from among a plurality of DS transmission masks indicated by the DS configuring information; and transmitting a discovery signal on the basis of the selected DS transmission mask.

Abstract: The present invention relates to a method by which terminals in a wireless communication system receive control channels. More particularly, the method includes the steps of: receiving control information that includes the transmission mode for the control channel and information about the number of antenna ports through a broadcast channel from a base station; and receiving the control channel on the basis of the control information.

Abstract: Disclosed are a method for transmitting a signal for device-to-device (D2D) communication of a user equipment in a wireless communication system and an apparatus for the same. Specifically, the method includes transmitting a D2D signal assigned at least one of a first synchronization information, a second synchronization information and a scheduling assignment information in a scheduling assignment resource unit. The first synchronization information and the second synchronization information are configured to be transmitted with different periodicities.

Abstract: The present application discloses a method of transmitting, by a relay terminal of a second cell, downlink data for a receiving cell of a first cell in a wireless communication system. Specifically, the method comprises the steps of: receiving downlink data for the receiving terminal of the first cell from the second cell; transmitting control information for the downlink data to the receiving terminal; and transmitting the downlink data to the receiving terminal on the basis of the control information, wherein the downlink data is delivered from the first cell to the second cell via a backhaul link. In particular, the control information is characterized by comprising: data grant which indicates a plurality of resource areas for communication between the relay terminal and the receiving terminal; and a request message for channel state information between the relay terminal and the receiving terminal.

Abstract: According to an embodiment of the present invention, a discovery signal transmission method, by a device to device (D2D) terminal in a wireless communication system, comprises the steps of: determining time-frequency resources for transmitting a discovery signal in a discovery period; and transmitting a discover signal on the time-frequency resources, wherein the discovery signal, if repeated b number of times in the discovery period, is repeated in consecutive time resources, and the frequency resources in each consecutive time resource are hopped as much as floor(Nf/b), wherein Nf is the number of discovery resources per subframe.

Abstract: The present invention relates to a method for transceiving a downlink control channel in a wireless communication system and an apparatus therefor. Specifically, a method for transceiving a downlink control channel in a wireless communication system comprises a step of receiving a downlink signal comprising a first downlink control channel (Physical Downlink Control Channel, PDCCH) and a second downlink control channel (Enhanced PDCCH; EPDCCH), wherein a starting symbol index of the second downlink control channel is greater than the final symbol index of the first downlink control channel.

Abstract: Disclosed is a method for a base station to transmit a downlink control channel to a terminal in a time division duplex (TDD)-based wireless communication system. Specifically, the method comprises determining the number of basic resource allocation units for each resource block pair for a downlink control channel on the basis of the type of a sub-frame during which the downlink control channel is transmitted; mapping, by basic resource allocation unit, control information for the terminal to a transmission resource; and transmitting, to the terminal, the downlink control channel comprising the control information, wherein, if the type of the sub-frame is the type in which a downlink transmission interval and a uplink transmission interval coexist, then the number of basic resource allocation unit for each resource block pair is determined on the basis of the length of the downlink transmission interval.

Abstract: According to an embodiment of the present invention, a discovery signal transmission method, by a device to device (D2D) terminal in a wireless communication system, comprises the steps of: determining a subframe pool in a discovery period; and transmitting a discovery signal in a subframe comprised in the subframe pool; wherein a frequency resource index and a time resource index, on which a discovery signal is transmitted in another discovery period which follows the discovery period, are determined by means of next_nf=(f_shift+floor((nf+Nf*nt)/Nt)) mod Nf and next_nt=(t_shift+nf+Nf*nt) mod Nt, respectively, wherein Nf is the number of discovery resources per subframe, Nt is the number of subframes per discovery period, f_shift is a frequency shift, t_shift is a subframe shift, nf is a frequency resource index on which the discovery signal is transmitted, nt is a time resource index on which the discovery signal is transmitted, and the f_shift and the t_shift are determined on the basis of the value that is

Abstract: A method for transmitting a downlink signal by a base station in a wireless communication system comprises transmitting at least a part of downlink data to a first user equipment (UE); and transmitting the other part of the downlink data of the first UE to a second UE that is paired with with the first UE when a size of the downlink data of the first UE exceeds a data reception capability of the first UE, wherein transmission for the first UE and transmission for the second UE are performed at the same time, and the other part of the downlink data of the first UE, which are transmitted to the second UE, may be shared with the first UE through direct communication between the first UE and the second UE.

Abstract: The present invention relates to a method and apparatus for allocating D2D resources using relay UE in a wireless communication system supporting D2D communication. The method may include receiving D2D resource allocation information related to a first resource set used in a first cluster from the head UE of the first cluster and transmitting the received D2D resource allocation information to head UE of a second cluster. The D2D resource allocation information includes at least one of D2D resource set configuration information indicative of a configuration of D2D resource sets used in D2D communication, D2D resource set use information indicative of a D2D resource set which is now used, and D2D resource set indication information indicative of a D2D resource set to be used in a next cluster. The D2D resource set is allocated for each cluster.

Abstract: The present invention relates to a method and apparatus for performing a D2D communication between device-to-device (D2D) devices in a wireless communication system in which a D2D direct communication is supported performed by a D2D transmission user equipment (UE), and the method includes transmitting control information related to a scheduling assignment through a D2D frame defined for the D2D communication to a D2D reception UE, and transmitting D2D data to the D2D reception UE through the D2D frame, wherein the D2D frame includes a contention period in which the control information is transmitted and a D2D data period in which the D2D data is transmitted, and wherein the contention period is located in front of the D2D data period.

Abstract: The present invention relates to a wireless communication system and, more particularly, to a method by which a terminal receives an EPDCCH signal in a wireless communication system and a device for the same, the method comprising the steps of receiving a subframe including an EPDCCH set, wherein the EPDCCH set includes a plurality of EPDCCH candidates; and monitoring the plurality of EPDCCH candidates in the EPDCCH set in order to receive the EPDCCH signal, wherein the number of EPDCCH candidates having an aggregation level of L in the EPDCCH set is indicated and is limited to a value of a specific form under a predetermined condition.

Abstract: There is provided a method for performing device-to-device (D2D) communication in a wireless communication system, the method comprising: by a first device, acquiring a resource pool for the D2D communication, wherein the resource pool includes a SA (scheduling assignment) resource pool indicating a resource region for SA transmission and a data resource pool indicating a resource region for D2D data transmission; performing D2D synchronization with a base station or a specific device; transmitting a SA (scheduling assignment) to a second device using the SA resource pool.

Abstract: Disclosed is a method for a base station to transmit a downlink control channel in a wireless communication system. Specifically, the method comprises the steps of: determining, on the basis of the number of usable resource elements in one pair of resource blocks, the size of a resource allocation unit for a downlink control channel and the number of resource allocation units within one pair of resource blocks; mapping the downlink control channel, from a preset number of resource block pairs, to the transmission resource on the basis of the determined resource allocation unit; and transmitting the downlink control channel to a terminal, wherein the size of the resource allocation unit is defined by the number of resource elements and is varied according to the number of usable resource elements.