Abstract: According to the disclosure of the present description, a method in which a base station determines a cooperative terminal is provided. The method comprises: a step of receiving status information from one or more terminals from among terminals that can cooperate with the base station in cooperative transmission; a step of determining, on the basis of the status information and upon receipt of a cooperative communication request from one terminal from among the cooperative terminals, a terminal which will cooperate with a terminal that has requested a cooperation; and a step of notifying the cooperative terminal of the terminal that has requested a cooperation.

Abstract: A method of transmitting a signal to a base station at a user equipment (UE) in a multi-antenna wireless communication system, can include generating interleaver input vector sequences, wherein the interleaver input vector sequences comprise vectors having a predetermined bit size, mapping the interleaver input vector sequences to an interleaver matrix, generating an output bit sequence by reading the interleaver matrix column by column, and transmitting the output bit sequence to the base station, wherein the predetermined bit size is defined by a product of a modulation order Qpm and the number NL of transmission layers.

Abstract: A method and apparatus for transmitting a downlink signal in a wireless communication system are disclosed. An apparatus for receiving a downlink (DL) signal from a base station (BS) and transmitting the received DL signal to a user equipment (UE) in a wireless communication includes: a plurality of reception antennas configured to receive DL signals from the BS; a processor configured to map the received DL signals to at least one transmission antenna; and a plurality of transmission antennas configured to transmit the received DL signals to the UE, wherein the processor is configured to select M transmission antenna(s) from among the plurality of transmission antennas (Ntx,REP Tx antennas), and map the received L signals to the M transmission antenna(s), and the number of the transmission antennas (Ntx,REP) is higher than the number of the reception antennas (Nrx,REP), and M is the number of the transmission antennas which is used to transmit the received DL signals.

Abstract: The present invention relates to a method in which a signal is transmitted between a base station and a terminal in a multi-antenna wireless communication system. The method transmits pre-estimated channel information to the terminal when the terminal moves to a specific position when channel estimation for a specific position is performed. As for the terminal which moves along a fixed route or the route of which can be estimated, the position of the terminal in the near future can be easily detected. Therefore, the transception of channel information can be performed in a more efficient manner in consideration of the above-described special environment.

Abstract: Disclosed is a method for allowing a terminal equipped with multiple antennas to transmit uplink control information in a wireless communication system. More specifically, the method comprises the steps of generating a plurality of codewords by using data information and said uplink control information; modulating each of the generated codewords based on predetermined modulation orders; and transmitting the modulated signals to a base station through said multiple antennas, wherein first uplink control information of said uplink control information is mapped into a particular codeword among the plurality of codewords, second uplink control information is repeated and mapped for each of the plurality of codewords, and a modulation order for the second uplink control information is the modulation order corresponding to said particular codeword.

Abstract: Disclosed is a method for determining transmission power for transmitting uplink signals between terminals in a wireless communication system that supports terminal-to-terminal communication, and an apparatus therefor. A method in which a first terminal determines transmission power for transmitting an uplink signal to a second terminal in a wireless communication system that supports terminal-to-terminal communication comprises the following steps: estimating a channel state based on a second terminal-specific signal received from the second terminal; transmitting the estimated channel information to a base station; receiving a message, including information on a transmission power control factor, from the base station or from the second terminal; and determining transmission power for transmitting an uplink signal to the second terminal based on the received message.

Abstract: A device for transmitting and receiving multi-input multi-output (MIMO) signal in a wireless communication system in which a plurality of communication systems is present includes a plurality of antenna modules and a recognition module for recognizing at least one of network information or antenna information of a source device. The recognition module compares a measurement result of the plurality of antenna modules with pre-stored information to recognize the network information or antenna information of the source device.

Abstract: The method for enabling a first mobile terminal connected to a first storage terminal to send data to a second storage terminal connected to a second mobile terminal in a wireless communications system includes the steps of: receiving the information of the data to be transmitted from the first storage terminal to the second storage terminal; transmitting the information of the data through a link connected to the second mobile terminal to the second mobile terminal; receiving the information of the second storage terminal from the second mobile terminal; determining whether it is possible to transmit the data through the link based on the information of the data and the information of the second storage terminal; and if it is possible to transmit the data, transmitting the data received from the first storage terminal through the link to the second mobile terminal

Abstract: The present invention relates to a method in which a signal is transmitted between a base station and a terminal in a multi-antenna wireless communication system. The method transmits pre-estimated channel information to the terminal when the terminal moves to a specific position when channel estimation for a specific position is performed. As for the terminal which moves along a fixed route or the route of which can be estimated, the position of the terminal in the near future can be easily detected. Therefore, the transception of channel information can be performed in a more efficient manner in consideration of the above-described special environment.

Abstract: An apparatus for boosting an MIMO (multi-input multi-out-put) signal and method thereof are disclosed. The present invention includes determining an initial transmit power value of the signal booster and applying an initial transmit power increment/decrement value to a sum of the initial transmit power value and the initial transmit power increment/decrement value in each preset time interval during an initial power control period.

Abstract: A method and apparatus for amplifying a MIMO signal in a wireless communication system are disclosed. A signal amplifier for amplifying a MIMO signal in a wireless communication system includes: a recognition module for recognizing network information and antenna information of a source device; and an adaptive link construction module for forming a link between a plurality of antenna with respect to the source device and a plurality of antenna with respect to the destination device on the basis of the recognized information.

Abstract: The present invention provides an uplink signal transmission method and apparatus. A method for transmitting an uplink signal to an access point (AP) by means of a station (STA) in a Wireless local area network (WLAN) system comprises: sensing a medium being occupied by another STA; and transmitting the uplink signal to the AP on the medium being occupied by another STA.

Abstract: The present invention relates to a method for transmitting uplink control information in a wireless access system and a terminal for the same. More particularly, the method comprises the following steps: attaching, if the bit size of uplink control information is larger than a preset number, cyclic redundancy check to the uplink control information; calculating the number of wireless resource elements for transmitting the uplink control information to which the CRC is attached; coding the uplink control information to which the CRC is attached, using a tail biting convolutional coding (TBCC) technique, based upon the calculated number of the wireless resource elements; and transmitting a physical uplink shared channel signal containing the coded uplink control information to a base station, wherein the uplink control information is either hybrid automatic repeat and request acknowledgement/negative acknowledgement (HARQ-ACK/NACK) information or rank indication (RI) information.

Abstract: A method and apparatus for transmitting and receiving uplink control information in a wireless communication system are disclosed. A method for receiving uplink control information from a base station in a wireless communication system includes the steps of allocating resources for transmitting uplink control information, transmitting resource allocation information of the resources, and receiving uplink control information from at least one user equipment through the resources. Herein, the resources are multiplexed so that a single PUCCH format can be used by a plurality of user equipments, a plurality of information, or a plurality of random access opportunities by enabling the plurality of user equipments, the plurality of information, or the plurality of random access opportunities to use different constellations each other.

Abstract: Disclosed are a method for performing and supporting device to device direct communication (D2D communication) in a wireless communication system and a device therefor. The method for performing D2D communication of a terminal comprises the steps of: transmitting a first message, which is a request from a terminal operated in an idle state for connecting D2D communication and the base station, to a base station; and receiving a second message as a response to the request from the base station, wherein the second message includes a C-RNTI (Cell-Radio Network Temporary Identifier) allocated in the terminal to be connected with the base station, a D2D-RNTI (Device to Device RNTI) allocated in the terminal for D2D communication, and/or peer discovery configuration information.

Abstract: A method of transmitting a signal to a base station at a user equipment (UE) in a multi-antenna wireless communication system, can include generating interleaver input vector sequences, wherein the interleaver input vector sequences comprise vectors having a predetermined bit size, mapping the interleaver input vector sequences to an interleaver matrix, generating an output bit sequence by reading the interleaver matrix column by column, and transmitting the output bit sequence to the base station, wherein the predetermined bit size is defined by a product of a modulation order Qpm and the number NL of transmission layers.

Abstract: A method for transmitting a signal by a device-to-device (D2D) user equipment (UE) configured to perform D2D communication in a wireless communication system includes transmitting a signal after application of a first timing advance (TA) value for D2D communication, wherein the first timing advance (TA) value for the D2D communication is associated with a second timing advance (TA) value applied when the UE transmits an uplink signal to a base station (BS).

Abstract: A method for transmitting a signal by a first user equipment (UE) configured to perform device-to-device (D2D) communication in a wireless communication system includes transmitting a signal on a subframe for D2D communication to a second UE configured to perform D2D communication, wherein at least one OFDM symbol from among OFDM symbols contained in the subframe includes a repetition signal.

Abstract: The present invention relates to a method for estimating the positions of devices in direct communication with each other, to a method for estimating the structure of a network, and to apparatuses for supporting the methods. According to one embodiment of the present invention, the method for estimating the positions of devices in a wireless access system which supports direct D2D communication between the devices includes the steps of: obtaining information on distance estimation to an adjacent D2D device (for example, a second D2D device) by a D2D device having two reference points (for example, a first D2D device); and estimating the position of the D2D device by using the information on distance estimation and the position information on the two reference points, at which time the information on distance estimation can be obtained through direct D2D communication between the D2D device and the adjacent D2D device.

Abstract: Disclosed are a method for performing or supporting D2D communication in a wireless communication system and an apparatus therefor. The method for enabling a D2D terminal to perform D2D communication according to the present invention comprises the steps of: receiving polling interval information allocated to transmit a polling signal for the D2D communication from a base station; and transmitting the polling signal to the base station within the allocated polling interval. The polling signal comprises an identifier of the D2D terminal, an identifier of a target D2D terminal selected through a search, and an indicator for indicating the execution of D2D communication.