Abstract: A sensor control circuit periodically transmits packets in synchronism with a one-by-one monotonous change in count values from a real-time clock circuit. The count values repeat the change within a predetermined numerical value range. The sensor control circuit transmits the count values by adding them to the packets. A collection control circuit acquires values of a reference clock synchronized with a reference time of an upper network from a reference clock generation circuit in accordance with reception of the packets, stores the values in a storage circuit as time stamps representing arrival times of the packets, performs statistical processing of the time stamps and the count values concerning the packets received, and corrects the time stamps based on an packet transmission interval and a reference arrival time representing the arrival time of a head packet, which are obtained from the statistical processing.

Abstract: In a sensor relay apparatus (10), a storage unit (11) stores a communication protocol correspondence list (22B) in which a sensor terminal (ST) and a communication protocol are registered in association with each other, and a communication format (22C) to be used in the communication protocol, a relay processing unit (12) communicates with the sensor terminal (ST) specified in the communication protocol correspondence list (22B) based on the communication protocol associated with the sensor terminal (ST), receives sensor data detected by the sensor terminal (ST), converts the format of the sensor data based on the communication format (22C) in association with the communication protocol, and relays and transfers the sensor data to a processing apparatus (20), and a relay managing unit (16) updates the communication protocol correspondence list (22B) or the communication format (22C) in the storage unit (11), based on a communication protocol correspondence list or a communication format newly notified from th

Abstract: Upon receiving a dummy packet, a data collection terminal slave device (2) appends, to a return packet, a timestamp indicating the reception time of the dummy packet and a timestamp indicating the transmission time of the return packet, and transmits the return packet to a data collection terminal master device (3). When performing a time synchronization process, the data collection terminal master device (3) transmits the dummy packet to the data collection terminal slave device (2).

Abstract: A pulse wave is detected chronologically. Time-frequency analysis is performed on the detected pulse wave to determine a power spectrum for each time. Local maximum points are determined for each one of the power spectra determined for the respective times. For each one of the power spectra determined for the respective times, a certain number of largest values of the determined local maximum points are extracted as pulse rate candidates for that time. A pulse rate candidate is compared with a pulse rate candidate for the preceding time to determine a difference in frequency between them, and pulse rates for which the determined difference in frequency is equal to or greater than a preset reference value are eliminated from the candidates.

Abstract: In a sensor relay apparatus (10), a communication control unit (13) receives sensor data from a sensor terminal (ST) via a terminal module (11) when a transmission data amount related to the sensor data to be transmitted from the sensor terminal (ST) is equal to or greater than a determination threshold. This can reduce the overhead time taken at the time of the transmission of the sensor data.

Abstract: In a sensor data acquisition terminal (10), an NTP back-end processing unit (12) synchronizes a terminal timing with a parent terminal timing by exchanging NTP packets for time synchronization with a parent terminal (20) based on NTP, and a protocol conversion unit (13) converts an NTP packet, which is output from the NTP back-end processing unit (12) and will be transmitted to the parent terminal (20), to a TPSN packet based on TPSN, outputs the TPSN packet to a wireless processing unit (14), converts a TPSN packet from the parent terminal (20), which is output from the wireless processing unit (14), to an NTP packet, and outputs the NTP packet to the NTP back-end processing unit (12).

Abstract: A sensor control circuit (25) periodically transmits a packet in synchronism with a change in a count value from a real-time clock circuit (22), which repeats a monotonous increment within a predetermined numerical value range, and also acquires and transmits the count value by adding the count value to the packet. A collection control circuit (14) acquires the value of a reference clock synchronized with the reference time of an upper network (NW) from a reference clock generation circuit (12) in accordance with reception of the packet, stores the value in a storage circuit (13) as a time stamp representing the arrival time of the packet, performs statistical processing of the time stamps and count values concerning a plurality of packets received, and corrects the time stamps concerning the packets based on an obtained packet transmission interval and a reference arrival time representing the arrival time of a head packet.

Abstract: Upon receiving a dummy packet, a data collection terminal slave device (2) appends, to a return packet, a timestamp indicating the reception time of the dummy packet and a timestamp indicating the transmission time of the return packet, and transmits the return packet to a data collection terminal master device (3). When performing a time synchronization process, the data collection terminal master device (3) transmits the dummy packet to the data collection terminal slave device (2).

Abstract: A measurement unit is attached to a measurement target person and measures an acceleration. A body motion calculation unit obtains the magnitude of a body motion of the measurement target person based on the acceleration measured by the measurement unit. An activity state determination unit time-serially obtains an activity state representing whether the measurement target person is in a first state or a second state, based on a posture decided by a posture decision unit and the magnitude of the body motion calculated by the body motion calculation unit. If the activity state after continues for a predetermined time defined in advance, an activity state correction unit determines that the transition of the activity state obtained by the activity state determination unit has been done. A time correction unit returns the transition time of the activity state determined by the activity state correction unit.

Abstract: In a sensor relay apparatus (10), a communication control unit (13) receives sensor data from a sensor terminal (ST) via a terminal module (11) when a transmission data amount related to the sensor data to be transmitted from the sensor terminal (ST) is equal to or greater than a determination threshold. This can reduce the overhead time taken at the time of the transmission of the sensor data.

Abstract: In a sensor data acquisition terminal (10), an NTP back-end processing unit (12) synchronizes a terminal timing with a parent terminal timing by exchanging NTP packets for time synchronization with a parent terminal (20) based on NTP, and a protocol conversion unit (13) converts an NTP packet, which is output from the NTP back-end processing unit (12) and will be transmitted to the parent terminal (20), to a TPSN packet based on TPSN, outputs the TPSN packet to a wireless processing unit (14), converts a TPSN packet from the parent terminal (20), which is output from the wireless processing unit (14), to an NTP packet, and outputs the NTP packet to the NTP back-end processing unit (12).

Abstract: A transmission device (10) includes: a series/parallel converter (11); an MSK modulator (31) for modulating a signal on a channel basis; a D/A converter (13); a frequency converter (14a) for conversion into different carrier frequencies; a synchronization circuit (32); an amplifier (15); a multiplexer (16) for multiplexing amplification signals; and an antenna (19).

Abstract: According to one embodiment, an information processing apparatus includes an encoding module, a decoding module, and a controller which controls operations of the encoding module and the decoding module. The encoding module includes a first arithmetic module which subjects data to an encoding process by using a first apparatus unique value, and a transmission module which outputs the data that is encoded. The decoding module includes a reception module which receives the encoded data that is output from the encoding module, and a second arithmetic module which decodes the encoded data by using a second apparatus unique value. The first apparatus unique value and the second apparatus unique value are the same value that is shared by the encoding module and the decoding module.

Abstract: A transmission device (10) includes: a series/parallel converter (11); an MSK modulator (31) for modulating a signal on a channel basis; a D/A converter (13); a frequency converter (14a) for conversion into different carrier frequencies; a synchronization circuit (32); an amplifier (15); a multiplexer (16) for multiplexing amplification signals; and an antenna (19).

Abstract: The present invention is directed to a radio communications apparatus with combining diversity in which received radio signals are weighted appropriately to reduce an error in demodulation and improve in communication quality. In the signal combining diversity radio communications apparatus, the digital reception signals of an intermediate frequency, output from the reception circuit, are demodulated by demodulation circuits into digital demodulation signals of the baseband. The digital demodulation signals are input to the multiplication circuits. The multiplication circuits multiply the digital demodulation signals by the weight coefficients, which are generated by weight coefficient generation circuits and corresponding to the digital demodulation signals, based on C/N ratio detection signals, in order to weight the digital demodulation signals. The weighted demodulation signals are added together by a digital addition circuit.