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: Provided is a multiplex transmission system capable of preventing occurrence of a mistake on connection of a client device to a multiplex transmission device.

Abstract: One aspect of the present invention is a communication system for a passive optical network that includes: an OLT system including a first OLT (Optical Line Terminal), a second OLT, and an OLT control apparatus that controls the first OLT and the second OLT; a plurality of splitters that are connected between the first OLT and the second OLT using optical communication channels; and ONU systems that are connected to the respective splitters using optical communication channels, and each include a first session establishing unit that establishes a session with the first OLT, a second session establishing unit that establishes a session with the second OLT, and a signal processing unit that executes signal processing of an ONU (Optical Network Unit) based on an optical signal output from the first session establishing unit or the second session establishing unit.

Abstract: A communication system of a passive optical communication network includes an optical line terminal (OLT) system including a first OLT, a second OLT, and an OLT control device that controls the first OLT and the second OLT, a plurality of splitters that connects between the first OLT and the second OLT with an optical communication path, and an optical network unit (ONU) that is connected to each of the plurality of splitters with an optical communication path.

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 communication device in a communication system in which functions that are converted to software are configured as a plurality of components, and the functions are realized as a result of the components being respectively executed by a plurality of communication devices that are connected to a network, the communication device including a sorting unit configured to acquire a signal that is transmitted by a first component and transmit the signal to a second component indicated by destination information that is added to the signal by the first component.

Abstract: A communication device in a communication system in which functions that are converted to software are configured as a plurality of components, and the functions are realized as a result of the components being respectively executed by a plurality of communication devices that are connected to a network, the communication device including a capsulation function unit configured to encapsulate information that is to be transmitted to another communication device.

Abstract: A communication device in a communication system in which functions that are converted to software are configured as a plurality of components, and the functions are realized as a result of the components being respectively executed by a plurality of communication devices that are connected to a network, the communication device including a platform for each component that realizes a function corresponding to a plurality of the networks, wherein the platform includes a common processing unit configured to execute processing that is not dependent on the network and a dependent processing unit for each network, the dependent processing unit being configured to execute processing that is dependent on the network.

Abstract: A communication system of a passive optical communication network includes an optical line terminal (OLT) system including a first OLT, a second OLT, and an OLT control device that controls the first OLT and the second OLT, a plurality of splitters that connect the first OLT and the second OLT with an optical communication path, and an ONU that is connected to each of the splitters with an optical communication path. The splitter distributes and outputs an optical signal transmitted from the OLT system to the ONU connected to the splitter and a succeeding device that is another splitter or the OLT system, and the OLT control device determines a distribution ratio at the splitter, the distribution ratio indicating a ratio between the intensity of the optical signal distributed to the succeeding device and the intensity of the optical signal distributed to the ONU.

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: A breakdown determination system includes a switching device that switches a transmission path of optical signals between an upper network and a lower network, one or more intermediate communication devices that relay communication between the upper network and the lower network, a selection device that selects a standby port of the intermediate communication devices, a measurement device that connects to the selected standby port via the switching device and measures an optical signal of the connected standby port, a determination device that determines whether an intermediate communication device including the selected standby port breaks down based on a result of measuring the optical signal, and a storage device that stores a result of determining whether the intermediate communication device breaks down.

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: A wiring information creation system includes a switching device that switches a transmission path of an optical signal between an upper network and a lower network in units of combinations of physical ports, a switching control device that outputs, to the switching device, an instruction for switching the transmission path such that the transmission path passes through a selected physical port, a connection control device that determines whether a communication port of an intermediate communication device that relays communication between the upper network and the lower network and the selected physical port have been connected to each other and acquires, from the intermediate communication device, a number of the communication port connected to the selected physical port, and an information creation device that creates connection information indicating the communication port connected to the selected physical port and updates wiring information indicating connection information for each physical port of the

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: Provided is a multiplex transmission system capable of realizing a redundant configuration for coping with a failure while reducing useless resources. A multiplex transmission system includes: a resource pool 130 which is provided in a first multiplex transmission apparatus 100 and which has resources capable of selectively constructing one or more functions among a plurality of functions; a monitoring unit which monitors, when a failure occurs, information on the failure; and a control unit which controls the resource pool. The control unit causes, when a failure occurs, the resource pool 130 to execute construction of a function necessary for constructing a redundant configuration according to contents of the failure on the basis of a monitoring result by the monitoring unit.

Abstract: A communication system is a communication system connected to an upper network and a lower network, and includes at least one intermediate communication device including a plurality of upper ports for inputting and outputting optical signals to and from the upper network, and a plurality of lower ports for inputting and outputting optical signals to and from the lower network, the intermediate communication device being configured to relay communication between the upper network and the lower network, a switching device that is connected to the upper and lower networks and the plurality of upper and lower ports, switches a connection between the upper network and the plurality of upper ports, and switches a connection between the lower network and a plurality of lower ports, and a control device that outputs, to the switching device, an instruction to switch the connection by the switching device according to a communication status between the upper network and the lower network.

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: 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.