Abstract: UE (100) supports WLAN communication and WWAN communication. The WWAN communication includes WWAN direct communication which is inter-terminal direct communication in conformity to a WWAN communication standard. The UE (100) applies the WLAN communication to a user plane while applying the WWAN direct communication to a control plane. The UE (100) transmits and receives a control signal through the WWAN direct communication.

Abstract: eNB 200 sets discovery resources that are radio resources used for transmission or reception of a discovery signal for performing the D2D communication. The eNB 200 controls a quantity (time length) of the discovery resources based on information on UE 100 existing in a target area that is a setting target area of the discovery resources.

Abstract: A radio terminal according to an embodiment is configured to perform direct communication with another radio terminal. The radio terminal comprises a controller configured to receive first data addressed to said another radio terminal from a base station. When the controller receives the first data from the base station, the controller is configured to also receive information indicating a first radio resource used for transferring the first data to said another radio terminal by the direct communication.

Abstract: When a UE 100-2 (a reception-side UE) that performs D2D communication by using UL radio resource switches communication modes between cellular communication and the D2D communication, if DL subframe in which data reception of the cellular communication should be performed and the UL subframe in which data reception of the D2D communication should be performed at least partially overlap on a time axis, then the UE 100-2 performs data reception in one subframe, out of the overlapping two subframes.

Abstract: A radio base station, user terminal, and apparatus in a mobile communication system including a plurality of cells corresponding to a plurality of frequency bands are configured to either transmit or receive a system information block indicating radio resources. The radio resources are used by a user terminal to transmit and/or receive a direct discovery signal for discovering another user terminal in proximity of the user terminal. The system information block includes information indicating a cycle of time resources reserved as the radio resources, information indicating one or more frequency bands selected from the plurality of frequency bands, and information indicating one or more resource blocks reserved as the radio resources in the one or more frequency bands. The radio base station, user terminal, and apparatus further configured to either transmit or receive change notification information, relating to a change of the radio resources, separately from the system information block.

Abstract: A communication control method, user terminal, and processor according to embodiments include a base station transmitting to a user terminal supporting direct communication in which a data path does not go through a network, a measurement instruction message for a measurement of a frequency region available for the direct communication. The frequency region includes a plurality of subchannels, each of which includes a plurality of resource blocks, and the measurement instruction message indicates a period for periodically transmitting a measurement result message. The user terminal measures a received signal intensity for each of the plurality of subchannels and transmits to the base station the measurement result message according to the period. The measurement result message includes a statistic based on a received signal intensity for each of the plurality of subchannels.

Abstract: An information processing apparatus includes a communication interface and a controller. The communication interface receives, from a sensor container, information indicating an orientation of the sensor container. The controller, based on the information indicating the orientation of the sensor container, calculates a calculated value indicating a remaining amount of contents of the sensor container. The controller determines an estimated value of the remaining amount on the basis of the calculated value. The communication interface transmits the estimated value indicating the remaining amount to an external device. When the calculated value indicating the remaining amount decreases by a first predetermined value or more within a predetermined time period, the controller does not perform the determination of the estimated value on the basis of the calculated value.

Abstract: A controller performs a mediation of an assigned radio resource such that the radio resource assigned to each of a plurality of other user terminals does not overlap each other, in a case where a transmission of user data is not performed among each of the plurality of other user terminals through D2D communication, and in a case where each of the plurality of other user terminals assigns the radio resource for transmitting the user data through the D2D communication.

Abstract: At least one processor and at least one memory coupled thereto associated with a first user terminal (UT) perform processes of previously storing pre-configuration information not derived from a base station, designating an area of resources for transmitting control information, determining a plurality of first radio resources within the area of resources for transmitting control information from the first UT to a second UT in a case that the first UT is out of coverage of the base station, and directly transmitting to the second UT the control information in each of the plurality of first radio resources by Device-to-Device (D2D) communication, each resource indicating a same at least one subframe of second radio resources to be used for transmitting data by the D2D communication. A second UT includes least one processor and at least one memory coupled thereto receives the control information from the first UT via D2D communication.

Abstract: A base station according to a present embodiment is a base station configured to manage a cell, and comprises: a controller configured to transmit, if a relay terminal configured to relay data by direct communication between a remote terminal and a network is not present in a vicinity of a radio terminal located within the cell, control information to the radio terminal. The control information is information for starting transmission of a discovery signal for discovering another radio terminal that can be the relay UE.

Abstract: A communication method according to an embodiment, comprising: transmitting, from a base station to a radio terminal, a list indicating association between an identification of a logical channel group and a priority; generating, by the radio terminal, a buffer status report for direct communication; and transmitting, from the radio terminal to the base station, the buffer status report. The buffer status report includes an index of an destination identifier, an identifier of the logical channel group, and a buffer amount associated with the identifier of the logical channel group. In the generating the buffer status report, the radio terminal generates the buffer status report based on the list.

Abstract: User terminal comprises a transmitter configured to transmit, in response to a received power of a signal from another user terminal satisfying a predetermined condition, direct communication in a proximity service without transmitting a synchronization signal in the proximity service, in a case where the user terminal is out of a network coverage.

Abstract: A radio base station, user terminal, and apparatus in a mobile communication system including a plurality of cells corresponding to a plurality of frequency bands are configured to either transmit or receive a system information block indicating radio resources. The radio resources are used by a user terminal to transmit and/or receive a direct discovery signal for discovering another user terminal in proximity of the user terminal. The system information block includes information indicating a cycle of time resources reserved as the radio resources, information indicating one or more frequency bands selected from the plurality of frequency bands, and information indicating one or more resource blocks reserved as the radio resources in the one or more frequency bands. The radio base station, user terminal, and apparatus further configured to either transmit or receive change notification information, relating to a change of the radio resources, separately from the system information block.

Abstract: At least one processor and at least one memory coupled thereto associated with a first user terminal (UT) perform processes of previously storing pre-configuration information not derived from a base station, designating an area of resources for transmitting control information, determining a plurality of first radio resources within the area of resources for transmitting control information from the first UT to a second UT in a case that the first UT is out of coverage of the base station, and directly transmitting to the second UT the control information in each of the plurality of first radio resources by Device-to-Device (D2D) communication, each resource indicating a same at least one subframe of second radio resources to be used for transmitting data by the D2D communication. A second UT includes least one processor and at least one memory coupled thereto receives the control information from the first UT via D2D communication.

Abstract: A user terminal according to first to third embodiments is used in a mobile communication system defined to observe a use state of an unlicensed band channel within an observation period before transmitting an uplink signal within an uplink transmission period in the channel. The user terminal includes a controller configured to perform transmission restriction to restrict transmission of the uplink signal during a last fixed section or a first fixed section of the uplink transmission period when transmitting the uplink signal within the uplink transmission period in the channel.

Abstract: eNB 200 controls a UE group including a plurality of UEs 100 (UE 100-1 and UE 100-2) that support cellular communication and D2D communication. The eNB 200 selects a communication mode for applying to the UE group from the cellular communication and the D2D communication, based on first channel information on a channel state between the UEs 100 (UE-UE) included in the UE group and second channel information on a channel state between the eNB 200 and the UEs 100 included in the UE group (UE-eNB).

Abstract: A first user terminal according to an embodiment comprises: at least one processor and at least one memory coupled to the processor. The processor is configured to perform processes of: determining first radio resources to be used for transmitting control information, the control information indicating location of second radio resources to be used for transmitting data by direct Device-to-Device communication; and directly transmitting the same control information repeatedly to a second user terminal in each resource block included in the first control resources.

Abstract: A mobile communication system which supports D2D communication that is direct inter-terminal radio communication, comprises: a user terminal that transmits and receives discovery signals for a discovery process of a communication target terminal of the D2D communication; and a base station that transmits discovery resource information indicating radio resources to be used for transmitting and receiving the discovery signals. The user terminal transmits and receives the discovery signals when the discovery resource information is received from the base station, by using the radio resource indicated by the received discovery resource information.

Abstract: UE (100) supports WLAN communication and WWAN communication. The WWAN communication includes WWAN direct communication which is inter-terminal direct communication in conformity to a WWAN communication standard. The UE (100) applies the WLAN communication to a user plane while applying the WWAN direct communication to a control plane. The UE (100) transmits and receives a control signal through the WWAN direct communication.

Abstract: A mobile communication system performs downlink multi-antenna transmission by applying a precoder matrix that defines transmission directionality of downlink and a rank that defines number of signal sequences of the downlink. The mobile communication system comprises a user terminal that feeds back feedback information of a target frequency band, to a base station. The feedback information includes combinations of precoder matrix information indicating the precoder matrix and rank information indicating the rank.