Abstract: A communication terminal apparatus, a terrestrial cellular base station and a mobile communication system are provided, which are capable of being shared in a terrestrial cellular mobile communication system and a satellite mobile communication system, preventing an interference between both systems and improving a spectral efficiency in a downlink of the terrestrial cellular mobile communication system, by simple switching control of radio resources. When the communication terminal apparatus is located in an area of the terrestrial cellular mobile communication system, all of time slots allocated to the terrestrial cellular mobile communication system and at least a part of time slots allocated to the satellite mobile communication system are used in a downlink, and all of time slots allocated to the terrestrial cellular mobile communication system are used and time slots allocated to the satellite mobile communication system are not used in an uplink.

Abstract: A deviation of time at which downlink signals synchronously transmitted from a macro-cell base station and a small-cell base station respectively reach a communication terminal apparatus can be made within an allowable range, without being affected by transmission delay in transmission cables of base station and propagation delay in radio transmission paths. The small-cell base station is provided with a radio transceiving section connected with antenna, a radio communication control section, a transmission cable connected with the radio transceiving section and the radio communication control section, and a downlink signal receiving section for receiving downlink signals transmitted from the macro-cell base station and the own base station respectively.

Abstract: A base station apparatus capable of preventing occurrence of a communication delay when performing an inter-cell interference control using an ABS is provided. The base station apparatus is capable of performing an inter-cell interference control by setting an ABS pattern with one cycle of a predetermined number of subframes, and when the ABS pattern is to be switched, changes an MCS (Modulation and Coding Scheme) index value to be determined by an adaptive modulation control, for a communication within a predetermined period of time on or before a switching time of the switching, with respect to a subframe in which a communication with a mobile station apparatus is allowed before switching the ABS pattern.

Abstract: Power supply systems capable of performing various modes of fee-charging are provided. A fee-charging apparatus memorizes two or more kinds of power-use-side identification information of a use side using the power supplied via the power-supply control apparatus, two or more kinds of power-supply-side identification information of a supply side supplying the power via the power-supply control apparatus, and fee-charge-target information predetermined to each of combination sets between the two or more kinds of power-use-side identification information and the two or more kinds of power-supply-side identification information.

Abstract: When bandwidth is dynamically allocated for audio communication via satellite communication, newly occurring audio communication can negatively affect the communication quality of the existing audio communication. Provided is a data communication apparatus that communicates via a satellite and includes an allocation control section that allocates in advance, for audio communication via the satellite, a bandwidth that is larger than a bandwidth needed for current audio communication being performed via satellite by at least a predetermined bandwidth. A program causes a computer to function as this data communication apparatus. A satellite communication system includes this data communication apparatus and this satellite.

Abstract: Mobile communication systems and base station control apparatuses are provided, by which a spectral efficiency can be improved while preventing interference between a terrestrial cellular mobile communication system and a satellite mobile communication system, and mobile communication services using mobile station apparatuses can be provided more surely in an emergent condition in which a failure occurs in a part of terrestrial cellular base stations. A same frequency band is used for radio communications between a mobile station apparatus 10 and each of terrestrial cellular base stations 20 and a communication relay apparatus 41 of artificial satellite 40.

Abstract: A base station apparatus and a communication system, witch are capable of optimizing a radio transmission path between a mobile station and a base station according to a communication speed of a backhaul link, are provided. The base station apparatus capable of communicating with a mobile station via a radio transmission path comprises information acquisition means of acquiring information on a communication speed of a backhaul link, and parameter adjustment means of adjusting communication parameters of the radio transmission path so that a communication speed of the radio transmission path becomes equal to or lower than the communication speed of the backhaul link, based on the information on communication speed of the backhaul link and a channel bandwidth of the radio transmission path.

Abstract: Communication systems and communication methods capable of evaluating a voice quality in a voice communication of a communication network and a presence or absence of a call drop of the voice communication are provided. A voice communication of transceiving a test signal for voice communication quality evaluation between a communication terminal apparatus 100 and a voice communication evaluation system 400 via the communication network 300 is performed. A voice quality evaluation value is calculated based on the test signal before transmission and the test signal after reception in the voice communication. A presence or absence of a call drop of the voice communication is determined based on a presence or absence of reception interruption of the test signal.

Abstract: A base station apparatus of small-cell base station is provided, by which interference from a small-cell in downlink signals of macro cell can be suppressed without lowering a power of downlink signals from the small-cell base station more than necessary, in state that a macro-cell base station is located neighboring the small cell of small-cell base station. The base station apparatus comprises transmission-power control means of controlling a down link transmission power of downlink in a range between a maximum power and a minimum power which are set in advance, and information acquisition means of acquiring information on electrical field intensity of a transmission signal transmitted from the macro-cell base station located at a periphery of the own base station.

Abstract: A base station apparatus is provided, by which a downlink transmission power (transmission output) can be properly set and frequent handovers of a mobile station (user equipment) can be prevented to occur. The base station apparatus is installed in a small-cell base station communicating with a mobile station in a mobile communication network, and provided with measurement means of measuring a time interval between a timing of receiving a handover request from a macro-cell base station when a mobile station performs a hand-in from a macro cell to a small cell and a timing of receiving information showing a failure of handover from the macro cell to the small cell, from the macro-cell base station, in sate that the small-cell base station is located in the macro cell or neighboring the macro cell and control means of controlling so as to decrease a setting of downlink transmission power based on the time interval measured by the measurement means.

Abstract: Communication becomes impossible for many mobile stations when a communication failure occurs in a fixed station while the mobile stations are operating in an infrastructure mode. Provided is a communication system that includes a plurality of mobile stations and at least one of a base station and a wireless LAN access point, wherein the plurality of mobile stations establish communication with each other and form an ad hoc network that realizes a mesh network topology, and at least one mobile station among the plurality of mobile stations establishes communication with at least one of the base station and the wireless LAN access point, and connects another mobile station among the plurality of mobile stations to the at least one of the base station and the wireless LAN access point using a tethering function.

Abstract: Business rule statements written in a natural language are automatically converted into DRL language sentences. A language conversion apparatus 10 includes: a storage device 16 that stores syntax definition information 30 for defining syntaxes to convert a business rule statement written in a natural language into a DRL language sentence on a syntax basis, and conversion information 40 for converting element variables of the business rule statement into element variables of the DRL language sentence; and a CPU 11 that analyzes a syntax of the business rule statement by comparing the business rule statement with the syntax definition information 30 and converts the business rule statement into the DRL language sentence by referring to the conversion information 40.

Abstract: To provide a system comprising: an unmanned aerial vehicle; and a free space location database, wherein the unmanned aerial vehicle has: a camera that is capable of 360°-image capturing on a horizontal plane; a positioning apparatus that measures a location of the unmanned aerial vehicle; a direction measuring apparatus that measures a direction of the unmanned aerial vehicle; an altitude measuring apparatus that measures an altitude of the unmanned aerial vehicle; and an information transmitting unit that transmits, to the free space location database, camera image data captured by the camera at every predetermined altitude, and the location, direction and altitude of the unmanned aerial vehicle at time of image capturing by the camera, and based on the camera image data, and the location, direction and altitude of the unmanned aerial vehicle, the free space location database corrects 3D data including terrain information to generate free space location data.

Abstract: An object of the present invention is to provide an antenna control system and a method capable of consistently maintaining an optimum orientation point between a donor antenna and an adjacent base station.

Abstract: Methods and systems of measuring communication quality in a communication via a mobile communication network are provided. A connection status of a communication terminal apparatus to a mobile communication network is confirmed when a timing of transmitting a measurement data of the communication terminal apparatus side from the communication terminal apparatus to a server comes. The measurement data is transmitted from the communication apparatus to the server when determining that it is a status capable of transceiving the measurement data, based on the confirmation result of connection status, and the measurement data is not transmitted from the communication terminal apparatus to the server when determining it is not a status capable of transceiving the measurement data. A communication quality in the communication via the mobile communication network is measured based on the measurement data received by the server from the communication terminal apparatus.

Abstract: A base station apparatus capable of ensuring a sufficiently large coverage of a small cell while reducing a power of downlink signals from a small-cell base station so as to be equal to or smaller than an allowable maximum power is provided. The base station apparatus of the small-cell base station comprises measurement means of measuring an interference level from a macro cell located in a periphery of the own base station and transmission-power control means of controlling a downlink transmission power based on a measurement result of the interference level from the macro cell.

Abstract: A base station apparatus is provided, by which a new base station (cell) can be surely added in a neighboring-cell list even when a maximum value is set for the number of base stations (cells) capable being registered in the neighboring-cell list. The base station apparatus is installed in a base station communicating with a mobile station in a mobile communication network. The base station apparatus comprises memory means of memorizing a list of peripheral base stations located at a periphery of the own base station, list-update means of adding a new peripheral base station in the list when finding the peripheral base station, and delete means of deleting at least one peripheral base station registered at an early timing in the list when the number of peripheral base stations registered in the list reaches to a predetermined maximum value that is set in advance.

Abstract: A radio wave status indicating apparatus is provided, the radio wave status indicating apparatus comprising: a radio wave intensity receiving unit that receives, from a communication apparatus, incoming radio wave intensity of the communication apparatus; a positional information acquiring unit that acquires positional information indicating a position of the communication apparatus; an expected value acquiring unit that acquires an expected value of incoming radio wave intensity at a position indicated by the positional information; a radio wave intensity comparing unit that compares the incoming radio wave intensity received by the radio wave intensity receiving unit with the expected value acquired by the expected value acquiring unit; and an indication information transmitting unit that transmits indication information based on a result of comparison by the radio wave intensity comparing unit to at least one of the communication apparatus and a communication terminal pre-registered in the communication ap

Abstract: Communication systems and communication methods are provided, by which load of a communication network when measuring a voice communication quality can be suppressed. A test signal for voice communication quality evaluation is transmitted to a communication terminal apparatus via a communication network, and a received voice data encoded by a predetermined scheme for the test signal received with the communication terminal apparatus is received from the communication terminal apparatus. A received voice signal is generated from the received voice data received from the communication terminal apparatus, and a evaluation value of voice communication quality is calculated by comparing the generated received voice signal with the test signal before transmitting.