Abstract: A communication system performs communication on the basis of a TCP. The communication system includes a transmission-side device and a reception-side device. A route switching time zone is a time zone in which a communication route between the transmission-side device and the reception-side device is switched from a first communication route to a second communication route. When detecting packet missing of a first packet in the route switching time zone, the reception-side device prohibits transmission of a retransmission request related to the first packet to the transmission-side device during a first time from detection of the packet missing. When not receiving the first packet during the first time, the reception-side device transmits a retransmission request related to the first packet to the transmission-side device.

Abstract: A relay device that relays a wireless signal received from a base station device to a terminal device performs control so that, when a predetermined signal generated using a first sequence is received from the base station device, the predetermined signal corresponding to a signal generated using a second sequence corresponding to the first sequence and not to be used by the base station device to generate the predetermined signal is relayed to the terminal device.

Abstract: A wireless communication system switches a connection destination of a ground wireless station from a first node station to a second node station. The ground wireless station establishes a link with an absolute node station when a link with the second node station cannot be established before a link with the first node station is disconnected. The absolute node station is connectable to the ground wireless station in an entire communication area and has a connection priority lower than connection priorities of the first node station and the second node station. The ground wireless station switches the connection destination from the first node station to the absolute node station. Thereafter, the ground wireless station switches the connection destination to the second node station after a link with the second node station is established.

Abstract: A signal processing device according to an embodiment distributes input high priority frames and low priority frames according to priorities, processes and transfers each of the distributed high priority frames and low priority frames, an accumulation unit accumulates the transferred high priority frames and low priority frames, sequentially reads out and outputs each of the high priority frames and low priority frames accumulated by the accumulation unit according to the priority, sets the low priority frames to be divided by a predetermined size and transferred in a case where the high priority frames are input or in a case where the accumulation unit accumulates the high priority frames, and sets the low priority frames to be transferred without division in a case where the high priority frames are not input and the accumulation unit does not accumulate the high priority frames.

Abstract: A transmission power controller includes: a control unit that outputs, within a range not exceeding a TPC set point, a TPC controlled variable that increases transmission power of a transmission system device more in a case of a larger attenuation of a reception signal received from a communication satellite; a data accumulation unit that accumulates the TPC controlled variable; an appropriate value extraction unit that extracts, as a TPC appropriate set point, the largest TPC controlled variable among the accumulated TPC controlled variables except a top predetermined proportion; and an updating unit that outputs, to the transmission system device, a reference transmission power increase signal that increases the reference transmission power more in a case of a larger difference between the TPC set point and the TPC appropriate set point and updates the TPC set point with the TPC appropriate set point. Thereby, efficient use of a transmitter is enabled.

Abstract: A wireless communication monitoring system for monitoring a hardware failure of a wireless communication unit of a wireless communication device using a remote monitoring control device, in which the wireless communication device transmits or receives a predetermined radio signal to or from a monitoring device added or attached to the host device to perform a life and death check for checking an operation, and the remote monitoring control device detects a hardware failure of the wireless communication unit of the wireless communication device on the basis of a result of the life and death check received from the wireless communication device. This makes it possible to detect a failure that cannot be detected from information obtained from a device state request to a wireless communication device of the related art.

Abstract: A vehicle seat includes a base part, a first movable part, a second movable part, a lock member, and an interlocking mechanism configured to link movement of the lock member to movement of the second movable part. The interlocking mechanism includes an attaching member, a first rotational member connected to the second movable part, a second rotational member connected to the lock member, and a swingable member provided swingably on the second rotational member. The engagement of the swingable member and the first rotational member causes the first rotational member and the second rotational member to rotate together, whereby the lock member moves from a lock position to an unlock position. The swingable member disengaging from the first rotational member permits the first rotational member and the second rotational member to rotate independently, whereby the lock member moves from the unlock position to the lock position.

Abstract: A suction method is provided as a method of performing, by using a suction collet, suction of a Fabry-Perot interference filter including a substrate and a laminated structure that is provided on the substrate and that includes a main surface facing the side opposite to the substrate, the method including a first step of arranging the suction collet so as to face the main surface, a second step of bringing the suction collet into contact with the Fabry-Perot interference filter after the first step, and a third step of suctioning the Fabry-Perot interference filter by using the suction collet after the second step.

Abstract: A reflector antenna includes: a radiator that radiates a radio wave; a main reflector that reflects the radio wave radiated from the radiator in a communication direction; an expansion panel that is attached to at least a part of the main reflector to increase an area of the main reflector; and a first adjustment unit that changes a position of the radiator, or a second adjustment unit that replaces the radiator with a radiator having a different radiation angle. This configuration makes it possible to implement a large-aperture antenna having excellent transportability and operability without preparing another antenna having a large aperture and replacing a standard antenna.

Abstract: A satellite communication system communicates via a communication satellite using one of a plurality of portable station devices as a master station device and another portable station device as a slave station device. The master station device transmits a first control signal for the slave station device to establish synchronization. The master station device determines that the slave station device is in a communicable state by a second control signal received from the slave station device that has received the first control signal and established synchronization. The master station device selects one of at least one slave station devices in a communicable state and transmits a third control signal for instructing start of transmission of a communication signal to the selected slave station device and the subject device. Due to this, it is possible to connect a channel between portable station devices without the intervention of a control station device or a regulation station device.

Abstract: A portable station device performs: a coarse adjustment to the antenna direction of a target communication satellite, the antenna direction being calculated based on the longitude of the target communication satellite from satellite information about the longitudes of communication satellites, a beacon signal, and a telemetry signal and the installation location of the portable station device; measurement of the frequencies of the beacon signal and the telemetry signal; determination of whether the measured frequencies of the beacon signal and the telemetry signal are correct or not with reference to the frequencies of the beacon signal and the telemetry signal of the target communication satellite in the satellite information; and a fine adjustment on the antenna direction such that the beacon signal received in the coarsely adjusted antenna direction reaches the highest reception level, if the determination is correct.

Abstract: A method includes receiving, by a computing device, acceleration information from an acceleration sensor attached to a product; receiving, by the computing device, from an image capture device an image of a prospective purchaser of the product; determining, by the computing device, a movement of the prospective purchaser based on the acceleration information and the image, the movement being in relation to a movement of the product; and sending, by the computing device, display information to a digital display, the display information including information related to the product. The movement of the product is based on the acceleration information.

Abstract: A conveyance seat accommodable in a recess of a floor includes: a seat cushion; a front leg portion which supports a front lower portion of the seat cushion and of which one end is rotatably fixed at the front lower portion of the seat cushion and the other end is detachably fixed at a position in front of the recess; a rear leg portion which supports a rear lower portion of the seat cushion and of which one end is rotatably fixed at the rear lower portion of the seat cushion and the other end is rotatably fixed to the floor inside the recess; and an arm portion of which one end is rotatably fixed to the rear leg portion and the other end is fixable to the floor at a position behind the other end of the rear leg portion.

Abstract: A mode adjustment system capable of changing interior in a conveyance with less effort and time includes an input device that allows an occupant to select mode information in which position information of a seat and a shade are registered in advance, a mode switching device that receives the mode information from the input device and switches the positions of the seat and the shade based on the mode information, a seat adjustment device, and a shade adjustment device. The mode switching device includes a seat movement amount calculator calculating the movement amount of the seat and a shade movement amount calculator calculating the movement amount of the shade, the seat adjustment device adjusts the position of the seat based on the calculated movement amount of the seat, and the shade adjustment device adjusts the position of the shade based on the calculated movement amount of the shade.

Abstract: Provided is a transmission radio wave checking method for a satellite communication system provided with a portable station, wherein the portable station executes a transmission process of transmitting a test signal and a control signal with a first polarization at a designated transmit level to a communications satellite, a reception process of receiving the test signal and the control signal transmitted back from the communications satellite with a second polarization orthogonal to the first polarization, and a control process of starting the transmission of the test signal and the control signal with the first polarization at a transmit level lower than a predetermined value, and raising the transmit level to a predetermined value while checking whether or not the test signal and the control signal received back from the satellite conform to a predetermined condition.

Abstract: A satellite communication earth station includes a detection unit that detects a longitude, a latitude, an altitude, an azimuth, and an inclination of the antenna, a drive unit that drives the antenna to adjust the azimuth angle, the elevation angle, and the polarization angle of the antenna to the communication satellite, a determination unit that determines whether the longitude, the latitude, the altitude, the azimuth, or the inclination detected by the detection unit or the azimuth angle, the elevation angle, or the polarization angle driven by the drive unit makes a change from an initial setting value to a predetermined threshold value or more, and a stop processing unit that stops transmission of the radio wave from the antenna when the determination unit determines that the change from the initial setting value to the predetermined threshold value or more is made.

Abstract: Determination information necessary to determine accuracy of detection of a longitude, a latitude, and an altitude of an antenna is acquired, whether the accuracy of detection of the longitude, the latitude, and the altitude is in a necessary and sufficient level is determined in accordance with the acquired determination information, the longitude, the latitude, the altitude, the azimuth, and the inclination of the antenna are detected also after elapse of a predetermined time after the transmission of the radio wave from the antenna is stopped, and the antenna is driven to adjust the azimuth angle, the elevation angle, and the polarization angle of the antenna to the communication satellite in accordance with the longitude, the latitude, the altitude, the azimuth, and the inclination of the antenna detected after elapse of the predetermined time after the transmission of the radio wave from the antenna is stopped.

Abstract: A portable station stores satellite information related to the longitude and the beacon signal of a plurality of communications satellites, executes a rough adjustment process of computing an antenna direction with respect to a target communications satellite on the basis of the longitude of the target communications satellite acquired from the satellite information and an installation location of the portable station itself, and roughly adjusting the antenna direction of the portable station itself in the computed antenna direction, and executes a fine adjustment process of, in a case where the frequency of a beacon signal is a predetermined frequency of the target communications satellite, measuring the beacon signal while increasing or decreasing the azimuth by treating the azimuth of the roughly adjusted antenna as a reference direction, and in a case where a measurement result of a beacon signal matches the information related to the beacon signal from another communications satellite at the longitude th

Abstract: A satellite communication system includes a plurality of earth station apparatuses and a control earth station apparatus, the plurality of earth station apparatuses each accommodating a terminal apparatus that establishes a session by using a control message being dedicated to perform communication, the control earth station apparatus transmitting and/or receiving a control signal on a controlling line to an earth station apparatus of the plurality of earth station apparatuses via a relay satellite, and the satellite communication system performing circuit-switching of a communicating line between the plurality of earth station apparatuses that are connected by single-hop connection to allow a plurality of the terminal apparatuses to perform communication with each other.

Abstract: A satellite communication system communicates via a communication satellite using one of a plurality of portable station devices as a master station device and another portable station device as a slave station device. The master station device transmits a first control signal for the slave station device to establish synchronization. The master station device determines that the slave station device is in a communicable state by a second control signal received from the slave station device that has received the first control signal and established synchronization. The master station device selects one of at least one slave station devices in a communicable state and transmits a third control signal for instructing start of transmission of a communication signal to the selected slave station device and the subject device. Due to this, it is possible to connect a channel between portable station devices without the intervention of a control station device or a regulation station device.