Abstract: An object of the present disclosure is to reduce traffic required for transmission of beacon information from a sensor apparatus to an access point and reduce power consumption without affecting position estimation processing in a high-order cloud or server.

Abstract: An object of the present disclosure is to collectively collect sensing data and metadata regarding normality of equipment by utilizing light communication protocol. The present disclosure is a system that collects sensing data from a sensor terminal in a data collection unit using a data collection network, the sensor terminal including a detection unit configured to detect metadata regarding internal information of the sensor terminal other than a sensor device that detects sensing data and equipment information and transmitting the metadata detected by the detection unit using an extended area or an optional area defined in communication protocol for transmitting the sensing data or the equipment information in a frame defined in the communication protocol, and the data collection unit associating the sensing data, the equipment information, and the metadata on the basis of information for identifying the sensor terminal described in the frame.

Abstract: An object is to provide a data collection device and the like capable of reducing a load on an IoT terminal in metadata transmission and power consumption associated with the metadata transmission. In the present invention, a controller is provided on a data collection side that collects metadata, the metadata transmitted from an IoT terminal is grasped, and the IoT terminal is instructed to reduce the transmission frequency of metadata that does not need high real-time property according to a sensor, the type of the IoT terminal, or the like. The IoT terminal transmits the metadata only at a window time (transmission timing, data size, metadata type, or the like) permitted by the metadata controller. As a result, the IoT terminal transmits the metadata only at a limited timing, and thus can reduce a transmission load and power consumption.

Abstract: An object of the present invention is to provide a position estimation system capable of grasping position information of a plurality of wireless devices without using an external device such as a fixed beacon or a GPS, a position estimation method, a wireless device, and an analysis device. A position estimation system according to the present invention includes a plurality of wireless devices 11 and an analysis device 12, wherein the wireless devices 11 are each configured to: send beacon signals; transfer the beacon signals between the wireless devices 11 in a range that the beacon signals reach; update flags indicating transfer histories of the beacon signals at the time of transfer; and discard beacon signals sent by own wireless devices upon reception thereof.

Abstract: An optical sensor (3) is installed in an optical path control device (1) that controls an optical path (2) without using an electrical element. The optical sensor (3) detects an optical signal passing through the optical path (2). A communication state determination unit (5) determines a communication state of the optical path (2) based on detection of the optical signal by the optical sensor (3). A position information reception management unit (10) receives and stores position information of the optical path control device (1). An information arrangement unit (6) collectively converts a determination result of the communication state determination unit (5) and the position information into information. A transmission unit (7) transmits the information.

Abstract: An optical communication system includes a looped path in which an active trunk fiber and a standby trunk fiber are connected in a loop. A plurality of optical combining/splitting units is provided on an active trunk fiber in series, and a plurality of slave devices is connected the plurality of optical combining/splitting units, respectively. A master device performs optical communication with each slave device. Each optical combining/splitting unit includes an optical sensor configured to detect an optical signal passing through an optical fiber and a transmitter. The transmitter determines whether or not there is an abnormality in optical communication on the basis of a detection state of the optical signal and transmits an abnormality notification including identification information of the optical combining/splitting unit to a monitoring apparatus in a case where there is an abnormality.

Abstract: An object of the present disclosure is to collectively collect sensing data and metadata regarding normality of equipment by utilizing light communication protocol. The present disclosure is a system that collects sensing data from a sensor terminal in a data collection unit using a data collection network, the sensor terminal including a detection unit configured to detect metadata regarding internal information of the sensor terminal other than a sensor device that detects sensing data and equipment information and transmitting the metadata detected by the detection unit using an extended area or an optional area defined in communication protocol for transmitting the sensing data or the equipment information in a frame defined in the communication protocol, and the data collection unit associating the sensing data, the equipment information, and the metadata on the basis of information for identifying the sensor terminal described in the frame.

Abstract: A plurality of optical sensors (3) are installed in an optical path control device (1) configured to control a plurality of optical paths (2) without using an electrical element. The plurality of optical sensors (3) detect optical signals each passing through at least one of the plurality of optical paths (2). A transmitter (4) simultaneously determines communication states of the plurality of optical paths (2) based on detection of the optical signals by the plurality of optical sensors (3), and transmits information on the determined communication states.

Abstract: Provided is a communication monitoring system capable of monitoring a state of a connection device that forms an optical path by using an optical passive component. A communication monitoring system (1) includes a plurality of photodetectors (9) provided in a connection device (6), a plurality of recognition units (13), a processing unit (14), a light emitting unit (15), a mixing unit (12), a separation unit (16), a collection unit (17), and a management unit (18). The photodetector (9) detects an optical signal passing through a corresponding optical path. The recognition unit (13) recognizes a state of detection by the corresponding photodetector (9). The processing unit (14) generates information regarding a communication state of the connection device (6) on the basis of the recognition by each recognition unit (13). The light emitting unit (15) converts the generated information into a monitoring signal that is an optical signal and transmits the monitoring signal.

Abstract: Provided is a communication monitoring device and a communication monitoring system capable of monitoring a state of a connection device that forms an optical path by using an optical passive component. A communication management device (8) of a communication monitoring system (1) includes a plurality of photodetectors (11), a plurality of recognition units (14), a processing unit (15), and a transmission unit (16). The photodetectors (11) are provided in a connection device (6). The connection device (6) connects a plurality of optical communication lines (3) by using an optical passive component to form a plurality of optical paths through which optical signals pass. Each photodetector (11) detects an optical signal passing through the corresponding optical path. Each recognition unit (14) recognizes a state of detection of the optical signal by the corresponding photodetector (11).

Abstract: An optical communication system includes a plurality of optical combining/splitting units provided on a trunk fiber in series, a plurality of slave devices connected to the plurality of optical combining/splitting units, respectively, a master device connected to the trunk fiber and configured to perform optical communication with each slave device, and a monitoring apparatus. Each optical combining/splitting unit includes an optical sensor configured to detect an optical signal passing through an optical fiber and a transmitter. The transmitter determines whether or not there is an abnormality in optical communication on the basis of a detection state of the optical signal and transmits an abnormality notification including identification information of the optical combining/splitting unit to the monitoring apparatus in a case where there is an abnormality in optical communication.

Abstract: A replacement management apparatus includes a detection unit configured to detect, for both a communication apparatus to be replaced and a communication apparatus for replacement, communication speeds of physical ports used for connection, in units of communication apparatuses that are connection destinations, and a replacement determination unit configured to derive, for both the communication apparatus to be replaced and the communication apparatus for replacement, a communication capacity that is a sum of the communication speeds for each of the communication apparatuses that are connection destinations, and determine, for all of the communication apparatuses that are connection destinations, in a case in which the communication capacity of the communication apparatus for replacement is equal to or greater than the communication capacity of the communication apparatus to be replaced, that the communication apparatus to be replaced is replaceable with the communication apparatus for replacement.

Abstract: A plurality of optical sensors (3) are each installed in an optical path control device (1) that controls a corresponding one of the plurality of optical paths (2) without using an electrical element. Each of the plurality of optical sensors (3) detects an optical signal passing through the corresponding one of the plurality of optical paths (2). A transmitter (4) determines a communication state of the corresponding one of the plurality of optical paths (2) based on detection of the optical signal by the corresponding one of the plurality of optical sensors (3), and transmits information on the determined communication state. A power supplying optical signal generation unit (11) generates a power supplying optical signal. An optical signal synthesizing device (12) synthesizes the power supplying optical signal with the optical signal and transmits a signal obtained by the synthesis to the optical path control device (1). A storage battery (13) supplies electric power to the transmitter (1).

Abstract: A topology detection unit (11) detects a physical connection status between adjacent devices (A, C) and a replaced device group (B) as a first topology and detects a physical connection status between the adjacent devices (A, C) and a replacement device group (D) as a second topology. A setting information acquisition unit (13) acquires setting information of each of the adjacent devices (A, C) and the replaced device group (B). A replaced-device-group information arrangement unit (14) uses the first topology to extract the setting information of each of the adjacent devices (A, C) related to the setting information of the replaced device group (B). A configuration generation unit (15) generates the configuration of the replacement device group (D), the configuration adapting to the second topology, based on the extracted setting information of each of the adjacent devices (A, C) The configuration setting unit (16) sets the generated configuration in the replacement device group (D).

Abstract: A location information transmitter transmits location information within a prescribed area. An IoT terminal receives the location information and transmits the location information and a device identifier. An address setting management device receives the location information and the device identifier and sets an IP address to be assigned to the IoT terminal on the basis of the location information and the device identifier and transmits the IP address to the IoT terminal. The IoT terminal sets the IP address received from the address setting management device for itself.

Abstract: A replacement management apparatus includes a detection unit configured to detect, for both a communication apparatus to be replaced and a communication apparatus for replacement, communication speeds of physical ports used for connection, in units of communication apparatuses that are connection destinations, and a replacement determination unit configured to derive, for both the communication apparatus to be replaced and the communication apparatus for replacement, a communication capacity that is a sum of the communication speeds for each of the communication apparatuses that are connection destinations, and determine, for all of the communication apparatuses that are connection destinations, in a case in which the communication capacity of the communication apparatus for replacement is equal to or greater than the communication capacity of the communication apparatus to be replaced, that the communication apparatus to be replaced is replaceable with the communication apparatus for replacement.

Abstract: A replacement management apparatus includes a detection section which detects a first communication speed and first setting information of a physical port used for connection for each of a communication apparatus to be replaced and a communication apparatus to be connected, and detects a second communication speed of a physical port used for connection for a replacing communication apparatus, and a generation section which generates second setting information of the physical port used for connection for each of the replacing communication apparatus and the communication apparatus to be connected based on the detected first communication speed, the detected second communication speed, and the detected first setting information.