Abstract:
A base station according to a first feature is used in a mobile communication system in which a plurality of functions related to radio communication are specified. The base station includes a receiver that receives processor information related to a load state or an attribute of an processor included in a radio terminal from the radio terminal, a controller that selects at least one function to be executed by the radio terminal on the basis of the processor information, and a transmitter that transmits information indicating the selected function to the radio terminal.
Abstract:
A server apparatus, a communication apparatus, and a communication method are disclosed. Communication terminals forming a group are capable of performing push-to-talk group communication through the server apparatus. In reception of a call setting request from a first communication terminal of the group by the receiver, when the group includes a second communication terminal to which call setting fails, the transmitter transmits, to a communication terminal of the group, an instruction to execute a discovery processing of discovering a communication partner terminal capable of performing a direct communication with the communication terminal without passing through the server apparatus. When a result of the discovery processing reveals that a third communication terminal that has received the instruction from the server apparatus is capable of performing the direct communication with the second communication terminal, call setting between the server apparatus and the second communication terminal is performed through the third communication terminal.
Abstract:
UE 100 performs, in a mobile communication system in which a small cell is arranged within a coverage of a macro cell, a cell reselection on the basis of neighboring cell information broadcast from the macro cell. The UE 100 acquire, in a connected state in which the UE 100 is connected to the macro cell, from a server 400 that manages small cell information on the small cell, the small cell information via the macro cell. The neighboring cell information broadcast from the macro cell is information on a neighboring cell other than the small cell. The UE 100 performs, in an idle state, the cell reselection on the small cell on the basis of the small cell information acquired from the server 400.
Abstract:
A UE 100 comprises a controller configured to select either a normal mode in which D2D communication is controlled by a network or a public safety mode in which the D2D communication is controlled by the UE 100 instead of the network, as a mode to be applied to the D2D communication. The UE 100 selects either the normal mode or the public safety mode on the basis of a reception situation of a public safety allowance signal and a public safety prohibition signal transmitted depending on a situation of the network.
Abstract:
A wireless communication system includes a first wireless communication device installed on an installation surface of a vehicle and a second wireless communication device. The first wireless communication device includes an antenna and a sensor. The antenna includes a first conductor, a second conductor, one or more third conductors, a fourth conductor, and a feeding line. The first wireless communication device transmits a signal from the antenna to the second wireless communication device, based on information detected by the sensor.
Abstract:
A wireless communication device includes an antenna and is used for storage as an electrical conductive body. The antenna includes a first conductor and a second conductor, one or more third conductors, a fourth conductor, and a feeding line. The first conductor and the second conductor face each other in a first axis. The one or more third conductors are located between the first conductor and the second conductor and extend in the first axis. The fourth conductor is connected to the first conductor and the second conductor and extends in the first axis. The feeding line is connected to any one of the third conductors. The first conductor and the second conductor are capacitively coupled to each other via the third conductor. The fourth conductor faces a conductor part of the storage.
Abstract:
A communication method according to an embodiment includes transmitting first information for causing a user terminal to hold context information of the user terminal from a network to the user terminal in a radio resource control (RRC) connected state. The context information includes a cell-radio network temporary identifier (C-RNTI) allocated to the user terminal. The user terminal holds the context information without discarding the context information, based on the first information, even if the user terminal transitions from the RRC connected state.
Abstract:
A base station is used for a mobile communication system that supports a dual connectivity. The base station includes a controller configured to establish an RRC connection with a user terminal, and to perform a mobility control in the dual connectivity.
Abstract:
An electromagnetic wave radiation device includes multiple electromagnetic wave radiation circuits, a radiation switching element, and a controller. Each electromagnetic wave radiation circuit includes an electromagnetic wave radiation element, a capacitor, and a discharging switching element. The radiation switching element is connected to the cathode side of the multiple electromagnetic wave radiation elements included in the multiple electromagnetic wave radiation circuits The radiation switching element is capable of energizing the multiple electromagnetic wave radiation elements. The controller discharges the capacitor in any one electromagnetic wave radiation circuit, among the multiple electromagnetic wave radiation circuits, after causing the electromagnetic wave radiation element in the one electromagnetic wave radiation circuit to radiate using the radiation switching element and before causing the electromagnetic wave radiation element in another electromagnetic wave radiation circuits to radiate light.
Abstract:
A helmet includes a first sensor for detecting biological information of a wearer, a second sensor for detecting environment information around the wearer, and a controller configured to acquire the biological information and the environment information from the first sensor and the second sensor, respectively. The controller determines a cycle for executing detection by at least one of the first sensor and the second sensor, based on the biological information and the environment information.