Abstract:
A UE 100 determining an assignment pattern of a radio resource used for D2D communication that is direct device-to-device communication when the UE 100 performs the D2D communication in a D2D group including a plurality of UEs 100, is comprised. The UE 100 determines, on the basis of a temporary identifier assigned from a network, the assignment pattern such that the radio resource used for the D2D communication is dispersed in a frequency direction and/or a time direction.
Abstract:
A communication control method comprises: transmitting, by a communication apparatus, a Device to Device (D2D) resource notification to a user terminal. The D2D resource notification includes information indicating a predetermined D2D radio resource available in a D2D proximity service and information indicating a condition not allowing for use of the predetermined D2D radio resource.
Abstract:
A communication control method comprises: transmitting, by a user terminal to a base station, a message including information notifying the base station of the user terminal having an interest in receiving a discovery signal in a discovery procedure for discovering a proximal terminal, and information of a frequency in the discovery procedure, when the user terminal has an interest in the discovery procedure. The user terminal notifies the base station of a request for a gap for receiving the discovery signal.
Abstract:
A user terminal according to an embodiment includes a receiver that receives a list transmitted from a base station, the list including discovery resource configurations; and a controller that selects a discovery resource configuration from among the discovery resource configurations, and uses the selected discovery resource configuration to directly transmit a discovery signal to other user terminals. Each of the discovery resource configurations includes: time resource information indicating time resources used for transmitting a discovery signal and including a variable number substituted into a mathematical expression; frequency resource information indicating frequency resources used for transmitting the discovery signal and including a range of continuous resource block numbers; and power information indicating transmission power used for transmitting the discovery signal.
Abstract:
UE 100 receives, when a connection with eNB 200 is established by the UE 100, from the eNB 200, preamble information indicating a random access preamble to be used in a random access procedure when establishing again a connection with the eNB 200. The UE 100 holds, without discarding, the preamble information even when the UE 100 establishes a connection with AP 300 and releases the connection with the eNB 200.
Abstract:
A communication control method according to the present invention is a method for receiving an MBMS service. a communication control method comprises: a step A of transmitting to the first cell, by a UE 100 in a connected state in cell A belonging to PLMN 1, information for transitioning from the connected state to an idle state, when it is determined that an MBMS service in which UE 100 is interested is distributed through PLMN 2; and a step B of receiving, by UE 100 that has transitioned from connected state to idle state, MBMS service from cell B, after reselecting cell B belonging to PLMN 2.
Abstract:
A base station according to an embodiment is a base station for performing communication with a user terminal in a self-cell. The base station comprises: a controller configured to control handover of the user terminal to a neighboring base station before setting a power saving communication mode for performing communication with the user terminal while reducing consumed power in the base station.
Abstract:
In a case where a first connection for downlink through which downlink data is transmitted from an eNB 200-1 to a UE 100 and a second connection for uplink through which uplink data is transmitted from the UE 100 to an eNB 200-2 have been established, the UE 100 transmits down feedback information to the eNB 200-1 and receives up feedback information from the eNB 200-2.
Abstract:
A mobile communication system according to the present invention supports D2D communication that is direct device-to-device communication in which a data path does not pass through a core network, The mobile communication system has a user terminal that exists on a cell managed by a base station and a plurality of user terminals that include the user terminal and perform a process of discovering a partner terminal in the D2D communication or the D2D communication, in which a maximum value of transmission power used by the user terminal for the discovering process or the D2D communication is calculated so that the maximum value becomes larger according to the number of the plurality of user terminals, and the user terminal performs the discovering process or the D2D communication so that the transmission power does not exceed the maximum value.
Abstract:
A communication control method used in a cellular mobile communication system that performs inter-terminal communication that is direct radio communication capable of being performed between user terminals in a state where a radio connection with a network is established, comprises a step of transmitting, by a first user terminal, to the network, communication request information indicating a desire to start the inter-terminal communication, a step of transmitting, by the network, to a second user terminal, start request information for starting waiting for a search signal, in a case where the second user terminal identified on the basis of the communication request information is stopping the waiting for the search signal for the inter-terminal communication, and a step of starting, by the second user terminal, waiting for the search signal upon receiving the start request information from the network.