Abstract:
Disclosed is a method for transmitting, by a device, a signal for direct device-to-device communication in a wireless communication system. Specifically, the method comprises the steps of: receiving a downlink subframe from a reference base station; transmitting a first signal to a counterpart device on the basis of the boundary of the downlink subframe; and transmitting a second signal to the counterpart device prior to the boundary of the downlink subframe by a predetermined offset.
Abstract:
One embodiment of the present invention relates to a method for device-to-device transreceiving a signal by a first device in a wireless communication system, wherein the method for transreceiving a signal comprises the steps of: receiving from a second device a discovery signal; determining the number of antenna ports associated with the transmission of the discovery signal; and decoding the discovery signal based on the number of antenna ports, wherein an initial value of a sequence constituting the DMRS is determined by a parameter related to a cell ID, and the value of the parameter related to the cell ID is selected from a range of values differing from values available to a physical cell ID and a virtual cell ID.
Abstract:
One embodiment of the present invention relates to a method for transmitting a signal from a device-to-device (D2D) terminal in a wireless communication system, which is a signal transmission method comprising: generating a reference signal sequence; mapping the reference signal sequence on specific symbols; and transmitting a signal comprising the reference signal sequence, wherein the specific symbols are shifted n and m symbols, respectively, away from the fourth symbol of each slot toward a time axis.
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:
Disclosed herein is a method for receiving a signal of a neighboring cell by a Device-to-Device (D2D) terminal in a wireless communication system. The method includes receiving an offset parameter and a periodicity parameter, determining a resource pool of the neighboring cell in consideration of relation between the periodicity parameter and a maximum possible number of subframes contained in a resource pool period set, and receiving the signal of the neighboring cell in the determined resource pool.
Abstract:
An embodiment of the present invention is a method for transmitting and receiving signals between a device and a device in a wireless communication system, comprising the steps of: determining a component carrier wave in which a discovery signal among two or more component carrier waves is transmitted; and detecting a discovery signal on the determined component carrier wave, wherein the component carrier wave in which the discovery signal is transmitted is determined on the basis of one among a frequency band of the component carrier wave, a device ID, a measurement result and a service type.
Abstract:
The present invention discloses a method for transmitting a reception acknowledgement response in a wireless communication system. The method includes receiving an enhanced physical downlink control channel (EPDCCH), determining a physical uplink control channel (PUCCH) resource based on a lowest one of enhanced control channel element (ECCE) indexes configuring the EPDCCH and a HARQ-ACK resource offset (ARO), and transmitting a reception acknowledgement response through the PUCCH resource. When a reception acknowledgement response related to two or more subframes is transmitted in a subframe for transmission of the reception acknowledgement response, a set of possible values for the ARO includes a first ARO value to shift a PUCCH resource of a specific subframe to a PUCCH resource region for at least one subframe prior to the specific subframe. The first ARO value provides a different shift amount depending on a group having the specific subframe among groups related to the two or more subframes.
Abstract:
A method and apparatus for reporting a downlink channel state to a serving Base Station (BS) at a User Equipment (UE) in a wireless communication system in which each of N (N is an integer equal to or larger than 2) BSs transmits one or more independent layers to the UE are disclosed. The method includes receiving configuration information about a channel state information reference signal (CSI-RS) process including CSI-RS resource i (i=0, . . . , N—1) and one channel state information interference measurement (CSI-IM) resource, the CSI-RS resource i being allocated to BS i from among the N BSs, performing channel measurement in CSI-RS resource i to measure downlink channel Hi from BS i, and transmitting, to the serving BS, a channel state report including a precoding matrix index i (PMIi) and a rank indicator i (RIi), which maximize throughput of downlink channels from the N BSs, and/or a channel quality indicator i (CQIi). The RIi may range from 0 to Lmax and Lmax is a maximum number of layers which the UE is able to receive.
Abstract:
The present invention relates to a method for a transmitting end efficiently transmitting a signal in a wireless communication system supporting a multi-antenna and an apparatus for same. More particularly, the method comprises a step of transmitting a downlink signal based on a precoding matrix (W) for an antenna comprising a plurality of antenna elements aligned perpendicularly, wherein the precoding matrix (W) corresponds to a codebook configured so that phase increase is limited with respect to a plurality of precoding vector values populating a same column.
Abstract:
One embodiment of the present invention relates to a method for enabling a first device to perform device-to-device (D2D) communication in a wireless communication system, comprising the steps of: receiving a D2D candidate list from a third device; receiving a D2D reference signal transmitted from a second device included in the D2D candidate list; and performing measurement using the D2D reference signal; and transmitting the measured result to the third device.