Abstract: A relay communication station is remotely controlled without increasing communication traffic of a feeder link of communication to be relayed between a communication relay apparatus such as a HAPS located in an upper airspace and a communication network on the ground side or on the sea side.

Abstract: Provided is a flying body comprising an antenna for forming a communication area by a beam irradiated toward the ground to provide wireless communication service for a user terminal in the communication area; and an attachment/detachment part configured to physically attach to and detach from another flying body for combining with and separating from another flying body. Provided is also a flying body comprising an antenna for forming a communication area by a beam irradiated toward the ground to provide wireless communication service for a user terminal in the communication area; a cable having an attachment/detachment part configured to physically attach to and detach from another flying body; a cable communication unit configured to communicate with another flying body via the cable; and an electric power transmission unit configured to transmit electric power with another flying body via the cable.

Abstract: Provided is a control apparatus for controlling a plurality of flying bodies including a first flying body having an antenna for forming a communication area by a beam irradiated toward the ground to provide wireless communication service for a user terminal in the communication area. The control apparatus comprises a selection unit configured to select a flying body of a combination target to be combined with the first flying body from the plurality of flying bodies; and a flying body control unit configured to control combination of the first flying body and the flying body of a combination target.

Abstract: A control device is provided which forms a communication area on a ground to control an aircraft having an antenna for providing a radio communication service to a user terminal in the communication area. The control device includes a control unit that makes a plurality of aircrafts fly in formation, and controls the plurality of aircrafts such that the communication area of each of the plurality of aircrafts moves while covering a part of a preset target area and the entire target area is covered by a plurality of the communication areas of the plurality of aircrafts.

Abstract: Provided is a flying body comprising an antenna for forming a communication area by a beam irradiated toward the ground to provide wireless communication service for a user terminal in the communication area; and an attachment/detachment part configured to physically attach to and detach from another flying body for combining with and separating from another flying body. Provided is also a flying body comprising an antenna for forming a communication area by a beam irradiated toward the ground to provide wireless communication service for a user terminal in the communication area; a cable having an attachment/detachment part configured to physically attach to and detach from another flying body; a cable communication unit configured to communicate with another flying body via the cable; and an electric power transmission unit configured to transmit electric power with another flying body via the cable.

Abstract: A relay communication station is remotely controlled without increasing communication traffic of a feeder link of communication to be relayed between a communication relay apparatus such as a HAPS located in an upper airspace and a communication network on the ground side or on the sea side.

Abstract: Provided is a control apparatus for controlling a plurality of flying bodies including a first flying body having an antenna for forming a communication area by a beam irradiated toward the ground to provide wireless communication service for a user terminal in the communication area. The control apparatus comprises a selection unit configured to select a flying body of a combination target to be combined with the first flying body from the plurality of flying bodies; and a flying body control unit configured to control combination of the first flying body and the flying body of a combination target.

Abstract: A control device is provided which forms a communication area on a ground to control an aircraft having an antenna for providing a radio communication service to a user terminal in the communication area. The control device includes a control unit that makes a plurality of aircrafts fly in formation, and controls the plurality of aircrafts such that the communication area of each of the plurality of aircrafts moves while covering a part of a preset target area and the entire target area is covered by a plurality of the communication areas of the plurality of aircrafts.

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: 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: 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: 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: A cellular radio communication system according to a first aspect of the present invention includes a plurality of base stations to send control information to a mobile station belonging to a cell controlled by each of the plurality of base stations for enabling handover to a cell adjacent to a cell controlled by each of the plurality of base stations. Further, the control information sent from at least some of the plurality of base stations concerns a smaller number of cells than a total number of adjacent cells to the cell controlled by each of the plurality of base stations.

Abstract: The present invention provides a pulse modulator and a PPM demodulation determining circuit employed in Ultra Wideband (UWB) wireless communications. The pulse modulator comprises high frequency delayers which delay an input pulse, variable gainers each of which amplifies the delayed pulse, and an adder which adds the amplified pulses. The PPM demodulation determining circuit comprises an absolute value converter which absolute value-converts a received signal, integration circuits which individually integrate the absolute value-converted signals, and a comparison/determination unit which compares the integrated signals.

Abstract: A PPM signal demodulator for demodulating a PPM signal transmitted in a UWB radio communication system includes a rectifier for rectifying a received PPM signal to obtain an absolute value signal, integrator and comparators for integrating the absolute value signal for every first, second and third integral times and comparing the integrated values for the integral times, absolute value circuits for converting respective outputs of the integrator and comparators to corresponding absolute values, moving average circuits for moving-averaging respective outputs of the absolute value circuits, a determining circuit for generating demodulation data on the basis of the integrated and compared result by the integrator and comparator, and a main control for generating, on the basis of the outputs of the moving average circuits, integral interval control signals that control the first, second and third integral times to supply them to the respective integrator and comparators.

Abstract: In a mobile communications system, a mobile station communicates with a first base station operating at a first antenna specific weight factor. While the mobile station is both in a coverage area of the first base station and a coverage area of a second base station, the mobile station transmits a control signal to the second base station which causes the second base station to operate at a second antenna specific weight factor which is the same as the first antenna specific weight factor. The mobile station then communicates with the second base station, operating at the second antenna specific weight factor, to complete a handoff operation.

Abstract: A portable wireless LAN terminal device attachable to an external connecting terminal installed in a portable external connection device, such as a portable data terminal device, includes a device body (2); means for transmitting and receiving (6-9) a signal through a wireless LAN circuit, the means for transmitting and receiving being installed the device body (2); means for supplying power (11) to each portion from means for accumulating power installed in the device body (2) or means for accumulating power attachable to the device body (2); a connecting terminal (13) installed in the device body (2) and attachable to the external connecting terminal; and first sound producing means (12, 15), which is installed in the device body, for producing sound based on the signal received by the means for transmitting and receiving (6-9).

Abstract: A PPM signal demodulator for demodulating a PPM signal transmitted in a UWB radio communication system includes a rectifier for rectifying a received PPM signal to obtain an absolute value signal, integrator and comparators for integrating the absolute value signal for every first, second and third integral times and comparing the integrated values for the integral times, absolute value circuits for converting respective outputs of the integrator and comparators to corresponding absolute values, moving average circuits for moving-averaging respective outputs of the absolute value circuits, a determining circuit for generating demodulation data on the basis of the integrated and compared result by the integrator and comparator, and a main control for generating, on the basis of the outputs of the moving average circuits, integral interval control signals that control the first, second and third integral times to supply them to the respective integrator and comparators.

Abstract: A PPM signal demodulator for demodulating a PPM signal transmitted in a UWB radio communication system includes a rectifier for rectifying a received PPM signal to obtain an absolute value signal, integrator and comparators for integrating the absolute value signal for every first, second and third integral times and comparing the integrated values for the integral times, absolute value circuits for converting respective outputs of the integrator and comparators to corresponding absolute values, moving average circuits for moving-averaging respective outputs of the absolute value circuits, a determining circuit for generating demodulation data on the basis of the integrated and compared result by the integrator and comparator, and a main control for generating, on the basis of the outputs of the moving average circuits, integral interval control signals that control the first, second and third integral times to supply them to the respective integrator and comparators.

Abstract: A PPM signal demodulator for demodulating a PPM signal transmitted in a UWB radio communication system includes a rectifier for rectifying a received PPM signal to obtain an absolute value signal, integrator and comparators for integrating the absolute value signal for every first, second and third integral times and comparing the integrated values for the integral times, absolute value circuits for converting respective outputs of the integrator and comparators to corresponding absolute values, moving average circuits for moving-averaging respective outputs of the absolute value circuits, a determining circuit for generating demodulation data on the basis of the integrated and compared result by the integrator and comparator, and a main control for generating, on the basis of the outputs of the moving average circuits, integral interval control signals that control the first, second and third integral times to supply them to the respective integrator and comparators.