Abstract:
The present invention relates to a method and a device for transmitting, by a first terminal, a device-to-device (D2D) signal in a wireless communication system. Particularly, the method comprises the steps of: performing D2D transmission scheduling for a device-to-device synchronization signal (D2DSS) and a device-to-device channel (D2DCH); and transmitting a D2D signal on a first D2D subframe among a plurality of D2D subframes, wherein the first D2D subframe is a D2D subframe in which a D2D synchronization signal transmission for the first terminal is configured among D2D subframes configured to enable a D2D synchronization signal transmission, and the D2D signal drops the D2DCH when the D2DSS and the D2DCH are simultaneously scheduled on the first D2D subframe.
Abstract:
The present invention discloses a proximity based notification method in a wireless communication system and a device for the same. In detail, a proximity based notification method in a wireless communication system supporting device to device communication (D2D) may include the steps of: configuring, by a first terminal, a list of terminals which participate in an notification service and a notification time; broadcasting, by the first terminal, a discovery signal including a first D2D ID on a physical sidelink discovery channel (PSDCH) when the notification time arrives; and outputting, by the first terminal, a notification for notifying that a second terminal is proximate when the first terminal receives a second discovery signal including a second D2D ID from the second terminal included in the terminal list on the PSDCH.
Abstract:
Disclosed is a method for allowing a terminal to transmit and receive signals to and/from a base station in a wireless communication system using a time division multiplexing method. Specifically, the method comprises the steps of: receiving a request signal for resetting into a second uplink/downlink setting while transmitting and receiving a signal according to a first uplink/downlink setting; terminating an uplink retransmission process associated with a specific uplink subframe when the use of the specific uplink subframe is changed into a downlink subframe according to the second uplink/downlink setting; and applying the second uplink/downlink setting at a specific time point to transmit and receive signals.
Abstract:
Disclosed are a method for measuring channel state information in a wireless access system that supports an environment in which an amount of uplink resource and an amount of downlink resource dynamically change, and an apparatus for the method. In detail, the method comprises: a step of receiving interference measurement resource information including information on the location of an interference measurement resource set in an uplink resource for interference measurement; a step of measuring interference being received from an adjacent cell at the location of the interference measurement resource a step of calculating channel state information using the measured interference value; and a step of transmitting the calculated channel state information to a base station.
Abstract:
A transmission terminal randomly selects, from a base station, one signature for device to device (D2D) communication from among a prescribed number of signatures for D2D communication, transmits a first message by means of resources that have been randomly selected from among predetermined time-frequency resources, receives, from the base station, a second message that comprises control information for a D2D broadcast or a groupcast signal transmission, uses the control information received via the second message to transmit a third message including the D2D broadcast or groupcast signal to one or more reception terminals, and receives a retransmission request signal for the third message from any one or more among the one or more reception terminals, the retransmission of the third message being carried out by means of a device other than the transmission terminal.
Abstract:
Disclosed are a resource allocation method in a wireless communication system supporting device-to-device (D2D) communication, and a device therefor. The resource allocation method for allocating resource for device-to-device (D2D) communication in a wireless communication system supporting D2D communication includes receiving, by a base station (BS), shared resource least interfered by a neighbor terminal and discovered by a D2D reception terminal and resource discovery time information from the D2D reception terminal, and synchronizing, by the BS, scheduling in order to allocate entirely or partially same resource to a cellular terminal for which the shared resource is scheduled and the D2D reception terminal at the resource discovery time.
Abstract:
Disclosed herein are a method and apparatus for transmitting and receiving discovery messages in a wireless communication system. Specifically, a method for transmitting and receiving discovery messages in a wireless communication system supporting communication between user equipments (UEs) includes receiving, by a UE in a Radio Resource Control_IDLE (RRC_IDLE) state, information about an allocated resource for transmitting a discovery message from a network and transmitting, by the UE, the discovery message in the resource for transmitting the discovery message. The resource for transmitting the discovery message may be allocated based on a tracking area in which the device is located.
Abstract:
An embodiment of the present invention provides a method for a terminal for transmitting a device-to-device (D2D) signal in a wireless communication system, the method for transmitting a D2D signal comprising the steps of: determining whether a D2D signal is to be transmitted on the basis of a transmission probability in a set resource region; and, if the D2D signal has been decided to be transmitted, transmitting the D2D signal from the set resource region, wherein the transmission probability is determined in accordance with a resource pool to which the set resource region belongs.
Abstract:
This specification provides a method for performing a discovery procedure in a wireless communication system supporting device to device (D2D) communication. The method is performed by first user equipment and includes monitoring a discovery resource region, selecting a discovery resource for sending a discovery message in the discovery resource region, and transmitting the discovery message to second user equipment through the selected discovery resource. The discovery resource region includes a first discovery resource region and a second discovery resource region.
Abstract:
An embodiment of the present invention provides a method for a terminal for transceiving a device-to-device (D2D) signal in a wireless communication system, the method for transceiving a D2D signal comprising: receiving an uplink grant; and performing uplink transmission in one or more subframes containing a fourth subframe from the subframe in which the uplink grant has been received, wherein if the uplink transmission is a transmission of a redundancy version from two or more subframes corresponding to a single bundle, the terminal receives a PHICH from the uplink transmission from any one from among the sixth subframe or the 16th subframe from the final subframe from among the two or more subframes.