Abstract:
One embodiment of the present invention is a method for carrying out device-to-device communication by means of a first terminal in a wireless communication system, the method comprising: a step of measuring a link with a second terminal; and a step of transmitting, if the result of the link measurement satisfies a predetermined condition, a link failure declaration to a third terminal. The link failure declaration includes buffer status information relating to the data being received from the second terminal. The first terminal receives the remaining portion of the data from the third terminal.
Abstract:
The present invention relates to a method by which a terminal receives a downlink signal through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system. The method includes the steps of: receiving one or more EPDCCH physical resource block (PRB) sets; and blind decoding EPDCCH candidates for each set level from among the one or more EPDCCH PRB sets, wherein one or more of EPDCCH candidate indexes and EPDCCH PRB indexes are used for determining an antenna port related to the EPDCCH candidates.
Abstract:
The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment decoding an enhanced physical downlink control channel (EPDCCH) in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining from a downlink subframe a reference element (RE) on which the EPDCCH is mapped; and decoding the EPDCCH based on the RE on which the EPDCCH is mapped. At least one EPDCCH-physical resource block (PRB)-set for monitoring the EPDCCH can be established for the user equipment, wherein a parameter set for each of the at least one EPDCCH-PRB-set is indicated by an upper layer, and the RE on which the EPDCCH is mapped can be determined based on the parameter set indicated by the upper layer.
Abstract:
The present invention relates to a method for achieving synchronization for the device-to-device (D2D) communication of a first terminal in a wireless communication system, comprising the steps of: calculating a time advance of a second terminal using the information relating to the transmission timing of a second transmission point, the downlink transmission timing of a first transmission point, timing the receipt of a downlink signal from the second transmission point; and receiving a signal from the second terminal using the timing advance of the second terminal.
Abstract:
A method for a terminal controlling power in a wireless communication system, according to the present invention, comprises the steps of: receiving from a base station power setting information on the difference in power setting values between a first channel for eNodeB-to-device (eNB2D) communication, and a second channel for device-to-device (D2D) communication; and controlling the power of the first channel and/or the second channel in accordance with the power setting information, wherein the power is controlled in accordance with a predetermined priority, which is based on a plurality of channels and a plurality of transmitted data items, which are different from each other are simultaneously transmitted by the terminal at a specific time.
Abstract:
The present invention relates to a method for transmitting a downlink control channel in a wireless communication system, and an apparatus therefor. Specifically, the method for transmitting an enhanced a physical downlink control channel (EPDCCH) from a serving cell comprises the steps of: forming a plurality of enhanced resource element groups (EREGs) by dividing available resource elements, comprised in one physical resource block (PRB) pair, into a predetermined number; forming an enhanced control channel element (ECCE), which is a resource allocation unit for the EPDCCH, by selecting one or more EREGs from among the plurality of EREGs; and transmitting the EPDCCH by means of the transmission resource allocated, for each ECCE, for the EPDCCH, wherein one or more EREGs forming the ECCE is selected on the basis of a cell identifier of the serving cell and/or an index of the one PRB pair.
Abstract:
The present invention relates to a method for a base station to transmit a downlink signal in a wireless communication system, including the step of transmitting information related to a downlink subframe, wherein the information related to the downlink subframe is a subframe set for uplink transmission.
Abstract:
One embodiment of the present invention provides a method for enabling a terminal to receive control information in a wireless communication system, comprising the steps of: determining resource units for Enhanced Physical Downlink Control Channel (EPDCCH) of a plurality of resource units, with respect to each of one or more resource sets; and blind-decoding the resource units for the EPDCCH with respect to each of the one or more resource sets, wherein each of the one or more resource sets is set for one of localized EPDCCH transmission or distributed EPCCH transmission.
Abstract:
The present invention relates to a method by which a terminal takes measures on a neighboring cell in a wireless communication system, which includes the steps of: receiving a channel state information-reference signal (CSI-RS) transmitted from the neighboring cell by using first time information received from a serving cell; and taking measurements using the CSI-RS, wherein the first time information is generated on the basis of the second time information of a serving cell, which receives an uplink signal from the terminal, and the third time information from a neighboring cell, which receives the uplink signal.
Abstract:
One embodiment of the present invention relates to a method for allowing a base station to transmit a reference signal in a wireless communication system, and the method for transmitting the reference signal comprises the steps of: generating a reference signal sequence; and applying an orthogonal sequence to said reference signal sequence, and mapping to resources of each antenna port, wherein said antenna ports are included in one of first and second antenna port sets, and the configuration of the antenna ports included in said respective antenna port sets varies according to the number of available resource elements in a physical resource block pair.