Abstract: A resource selection method, an apparatus, and a device, where the method includes determining, by first user equipment (UE), parameter information of a sensing window, where the parameter information includes at least one of a start time, a time span, or a quantity, sensing, by the first UE, the resource in the sensing window according to the parameter information of the sensing window, and selecting, by the first UE, a resource according to a sensing result. According to the resource selection method, the apparatus, and the device, power consumption of UE can be reduced.

Abstract: A method of performing a random access procedure includes randomly selecting a backoff time from within a backoff window ranging from 0 to a specified multiple of a random access preamble unit, waiting until a time initialized with the backoff time expires, and retransmitting a random access preamble.

Abstract: A user apparatus in a mobile communication system includes an allocation means that divides a message that includes control information and data into a plurality of partial messages, and allocates resources included in one or more resource pools to the plurality of partial messages; and a transmission means that transmits the plurality of partial messages using the resources allocated by the allocation means.

Abstract: There is provided a user apparatus of a radio communication system supporting D2D communication, the user apparatus including a receiver configured to receive a first synchronization signal transmitted from a base station, a second synchronization signal transmitted from another user apparauts, or an external synchronization signal or external synchronization information transmitted from an external synchronization source; and a synchronization processor configured to execute synchronization using the first synchronization signal, the second synchronization signal, or the external synchronization signal or the external synchronization information received by the receiver; wherein, upon detecting that the user apparatus is outside a coverage area of the base station or outside an area in which the synchronization signal or the synchronization information can be received, the receiver is configured to receive the second synchronization signal by executing an initial search within a time window defined for monit

Abstract: A relay device of a mobile communication system supporting Device to Device (D2D) communication that includes a transmitter that transmits, on a second carrier, a broadcast message indicating that a relay process can be executed, the relay process being such that a message to be received on a first carrier is to be transmitted on the second carrier; and a relay unit that transmits, on the second carrier, the message received on the first carrier.

Abstract: A user apparatus in a radio communication system that supports a Device to Device (D2D) communication is disclosed. The user apparatus includes a first transmission unit configured to transmit radio resource allocation information, in case of transmitting a Medium Access Control (MAC) Protocol Data Unit (PDU) of high priority, by using a specific subframe that is used for transmitting radio resource allocation information corresponding to a MAC PDU of high priority, from among radio resources allocated to a D2D control channel. A second transmission unit is configured to transmit the MAC PDU via a D2D data channel in accordance with the transmitted radio resource allocation information.

Abstract: User equipment of a mobile communication system supporting D2D includes a reservation unit that transmits reservation information including reservation resource identification information corresponding to a reservation resource used for data transmission by the user equipment; and a transmitter that transmits data using the reservation resource corresponding to the reservation resource identification information.

Abstract: The present invention is designed so that, when a plurality of inter-terminal discovery signals with varying numbers of information bits are used in a radio communication system in which inter-terminal communication is carried out, user terminals can be discovered based on the inter-terminal discovery signals. According to the inter-terminal communication method of the present invention, a user terminal (#1) determines the signal format of a discovery signal based on the number of information bits of the discovery signal, transmits the discovery signal based on the signal format, and also transmits signal format information to represent this signal format. A user terminal (#2) receives the signal format information from the user terminal (#1), and, based on the signal format represented by the signal format information, detects the discovery signal.

Abstract: Provided are a resource scheduling method and device; the method comprises: scheduling resource according to the transmission demands; and configuring a frame structure with a non-fixed frame length matching the scheduled resource. The method according to the present invention prevents wastage of wireless resources caused by competition conflict or random back-off, and can better adapt to the demands of different kinds of data services with varied features in the future.

Abstract: According to the present invention, data can be efficiently transmitted to a plurality of remote UEs in a D2D communication. A communication terminal includes a setting section configured to set layer 2 destination information so that identification information included in the destination information separately identifies a plurality of terminals with which D2D is carried out; and an allocating section configured to allocate, in one scheduling interval, the identification information to a control channel in a different subframe per each of the plurality of terminals, and to allocate, in one scheduling interval, transmission data respectively transmitted to the plurality of terminals to a data channel in a different subframe per each of the plurality of terminals.

Abstract: According to the present invention, in the case where a relaying operation is applied using a user terminal that supports D2D, the power consumption of a user terminal that is used as a relay node can be suppressed. A user terminal is configured to connect with a radio base station and another user terminal, and configured to relay transmission between the radio base station and the other user terminal. The user terminal includes a transmitting section configured to transmit information related to relay capability to the other user terminal; a receiving section configured to receive the information related to relay searching that is transmitted from the other user terminal; and a control section configured to control a connection state with respect to the radio base station. The transmitting section controls a transmission of the information related to relay capability based on the connection state with respect to the radio base station.

Abstract: The present disclosure describes a system that attempts to reconcile diverse goals and re-cast the goals into something that is quantifiable and optimizable. One way to reconcile diverse goals is by converting these “constraints”—with the huge problems of feasibility—into errors that can be minimized. This disclosure also presents solutions for rate constraints which previously have not been dealt with. The resulting system enables advertisers to dynamically adjust their campaign based on the needs of the moment. Such a system can have advantages in terms of controllability, smoothness, as well as avoiding hard stop conditions that plague the constraint-based approach. In order to achieve this result, solutions are presented for problems of pacing, viewability prediction, and most particularly, error minimization.

Abstract: A user apparatus is provided. The user apparatus is used in a mobile communication system in which D2D communications are supported. The user apparatus includes an obtaining unit configured to obtain from a base station control rules including predetermined communication methods applied to corresponding user apparatus types; a determination unit configured to determine which of the predetermined communication methods is to be applied to the user apparatus by comparing a type of the user apparatus and the control rules; and a transmission unit configured to transmit a D2D signal based on the determined predetermined communication method.

Abstract: A system and method for device-to-device (D2D) communication includes a method. The method includes acquiring, by a destination user equipment (UE), a transmission scheduling assignment. The transmission scheduling assignment indicates transmission resources and feedback resources. The method further includes receiving, by the destination UE, a transmission using the transmission resources indicated by the transmission scheduling assignment. The method further includes determining, by the destination UE, a receive quality of the transmission. The method further includes indicating, by the destination UE, receipt of the transmission according to the receive quality of the transmission. The indicating is performed using the feedback resources indicated by the transmission scheduling assignment.

Abstract: A system and method for device-to-device (D2D) communication includes detecting, by a transmitting user equipment (UE) of a plurality of UEs, a sidelink type of a receiving UE of the plurality of UEs, the sidelink type used by the receiving UE to communicate on a discovery channel, determining, by the transmitting UE, a pool of resources for an air interface supported by the receiving UE and the transmitting UE, selecting, by the transmitting UE, transmission resources from the pool of resources according to the sidelink type of the receiving UE, indicating, by the transmitting UE, the transmission resources to the receiving UE over the discovery channel, and communicating, by the transmitting UE, directly with the receiving UE using the transmission resources

Abstract: Systems and methods are disclosed for demographic prediction based on aggregated training data. The predictions are based on auditing aggregated data associated with identified properties of web requests. The audited information is based on a batch of prior web requests that have the same property and have been audited by a measurement company.

Abstract: A method of performing a random access procedure includes randomly selecting a backoff time from within a backoff window ranging from o to a specified multiple of a random access preamble unit, waiting until a time initialized with the backoff time expires, and retransmitting a random access preamble.

Abstract: A user equipment apparatus for supporting D2D (user equipment-to-user equipment) communication, the user equipment apparatus being situated in coverage of a base station, including a control unit configured to determine a transmission duration for which a D2D synchronization signal is transmitted according to a parameter related to transmission of the D2D synchronization signal; and a transmission unit configured to transmit the D2D synchronization signal within the determined transmission duration of the D2D synchronization signal.

Abstract: A transmission power control method in a mobile communication system including a user apparatus and a base station is provided. The method enables the base station to control transmission power of a discovery signal of the user apparatus. The method includes estimating a number of the user apparatuses transmitting discovery signals by monitoring the discovery signals transmitted from the user apparatuses, by referring to power class setting information which associates the number of the user apparatuses transmitting the discover signals with a power class used for determining transmission power information of the discovery signal in the user apparatus, determining the power class associated with the number of the estimate user apparatuses, and transmitting the determined power class to the user apparatus.

Abstract: To enable a user terminal that receives a discovery signal of another user terminal for performing Type 1 discovery to synthesize and receive the discovery signal, a user terminal capable of executing inter-terminal direct signal transmission/reception has a selecting section that selects a discovery signal transmission resource at the next period for each period, and a transmission section that transmits information on the discovery signal transmission resource at the next period, together with the discovery signal.