Abstract: A roadside information processing system according to the present disclosure includes a plurality of roadside devices installed on a roadside of a road and capable of communicating with a vehicle travelling on the road, and a plurality of sensors installed on the roadside to perform sensing on the road and its periphery, wherein at least one of the roadside devices includes an edge-server processing unit to obtain first information from in-vehicle devices included in the vehicles and from some of the plurality of the sensors, the first information indicating information about a periphery of the vehicles and about the road and its periphery, and to generate second information by using the first information, the second information indicating a position of the vehicles, a movement direction of the vehicles, and traffic jam conditions on the road.

Abstract: An optical line terminal (OLT) for an optical network configured to communicate with optical network units (ONUs) in a PON-type optical network, the OLT including: a processing circuitry, for each ONUs, to manage a transmission delay time in transmission to the ONU to manage an acceptable waiting time of uplink data of the ONU; to obtain an uplink transmission start time and data amount of the optical network unit, based on uplink assignment information; and to generate uplink transmission grant information, which is made up of a time point and time length of uplink transmission to the ONU, wherein the processing circuitry determines the uplink transmission grant information on transmission to the ONU, based on a transmission delay time of the ONU, on the uplink transmission start time and data amount of the ONU, and on the acceptable waiting time of uplink data of the ONU.

Abstract: An object identification device according to the present invention includes: an acquisition unit that acquires, from a sensor that measures a position of an object and a speed of the object, sensor information measured by the sensor, and acquires size information from a device that transmits size information indicating a size and a position of the object; a designator adding unit that adds, to each piece of the sensor information, a sensor position designator indicating which part of the object is likely to be detected; and an information integration unit that determines, based on the sensor position designator, whether the object corresponding to the size information and the object corresponding to the sensor information are the same.

Abstract: A life prediction method for an optical module that keeps optical output constant by controlling a bias current that is applied to a laser diode includes, by a life prediction device: acquiring a current value of the bias current from the optical module; holding an initial bias current value that is an initial current value of the bias current; calculating the number of digits of a difference value between the bias current value and the initial bias current value, and determining whether there is an increase in the number of digits; calculating a time interval at which occurrence of the increase in the number of digits is detected; and estimating a life of the optical module using the time interval, a first threshold, and the number of digits.

Abstract: A processing device according to the present invention includes an object identification unit that generates, based on data measured by sensors, an object identification information that is information indicative of a state of an object, and a reliability degree determination unit that determines a reliability degree of the object identification information using at least one of individual information of the sensors, environmental information obtained when the sensors have performed the measurement, and time information that is a time at which the sensors have performed measurement.

Abstract: A processing device according to the present invention includes an object identification unit that generates, based on data measured by sensors, an object identification information that is information indicative of a state of an object, and a reliability degree determination unit that determines a reliability degree of the object identification information using at least one of individual information of the sensors, environmental information obtained when the sensors have performed the measurement, and time information that is a time at which the sensors have performed measurement.

Abstract: An optical line terminal (OLT) for an optical network configured to communicate with optical network units (ONUs) in a PON-type optical network, the OLT including: a processing circuitry, for each ONUs, to manage a transmission delay time in transmission to the ONU to manage an acceptable waiting time of uplink data of the ONU; to obtain an uplink transmission start time and data amount of the optical network unit, based on uplink assignment information; and to generate uplink transmission grant information, which is made up of a time point and time length of uplink transmission to the ONU, wherein the processing circuitry determines the uplink transmission grant information on transmission to the ONU, based on a transmission delay time of the ONU, on the uplink transmission start time and data amount of the ONU, and on the acceptable waiting time of uplink data of the ONU.

Abstract: A time synchronization method for a communication system configured to perform protection switching, the communication system including a first network in which a master station and a slave station are connected via plural physical lines including a working line and a backup line and a second network connected to the slave station, the method including a time synchronization in which the slave station executes, when not detecting a communication failure of a downlink signal transmitted from the master station, synchronization processing for synchronizing, based on a clock of the slave station and timing information, time information transmitted to the second network with time information included in a time synchronization command and suppresses, when detecting a communication failure or receiving a switching notification from the master station apparatus, a synchronization error due to a difference between the clock of the slave station and the timing information.

Abstract: A communication system in which a combination of redundant configurations of communication lines and a power-saving-mode operating function is incorporated, and includes a power-saving-device identification unit that identifies a slave station device in a power saving mode, and a line switching unit that switches a communication line forming a communication route from the currently used communication line to the backup communication line when a state where a master station device does not receive a signal from any of a plurality of slave station devices except for the slave station device identified by the power-saving-device identification unit as being in the power saving mode among the slave station devices continues for a predetermined time.

Abstract: The control device includes a power-saving control unit that intermittently repeats, based on a power saving permission signal transmitted from the master station apparatus, power saving control in which the slave station stops or reduces power supply to a transmitter or a receiver for a predetermined pause duration while maintaining a communication link and a monitoring unit that monitors out of synchronization by comparing a synchronization signal received from the OLT and a time of the ONU. The control device shifts from a registered state to a deregistered state when the monitoring unit detects the out of synchronization. On the other hand, after the pause duration of the power saving control, the control device suppresses the shift to the deregistered state due to the detection of the out of synchronization.

Abstract: A time synchronization method for a communication system configured to perform protection switching, the communication system including a first network in which a master station and a slave station are connected via plural physical lines including a working line and a backup line and a second network connected to the slave station, the method including a time synchronization in which the slave station executes, when not detecting a communication failure of a downlink signal transmitted from the master station, synchronization processing for synchronizing, based on a clock of the slave station and timing information, time information transmitted to the second network with time information included in a time synchronization command and suppresses, when detecting a communication failure or receiving a switching notification from the master station apparatus, a synchronization error due to a difference between the clock of the slave station and the timing information.

Abstract: The control device includes a power-saving control unit that intermittently repeats, based on a power saving permission signal transmitted from the master station apparatus, power saving control in which the slave station stops or reduces power supply to a transmitter or a receiver for a predetermined pause duration while maintaining a communication link and a monitoring unit that monitors out of synchronization by comparing a synchronization signal received from the OLT and a time of the ONU. The control device shifts from a registered state to a deregistered state when the monitoring unit detects the out of synchronization. On the other hand, after the pause duration of the power saving control, the control device suppresses the shift to the deregistered state due to the detection of the out of synchronization.

Abstract: An optical line termination includes a deserializer that parallelizes burst data received from a termination device, a fixed-pattern generating unit that generates fixed pattern data that is a predetermined fixed data, and a data selecting unit that selects either the fixed pattern data or the burst data based on a data-head instruction signal indicating a head of the burst data and a data-end instruction signal indicating an end of the burst data, and inputs the selected data to a deserializer as data to be parallelized.

Abstract: A communication apparatus includes a main-data processing unit that performs predetermined data processing on input data, and operates by switching two states of a sleep state as a state where an operation of the main-data processing unit is stopped and a normal state as a state where the main-data processing unit is operating. The communication apparatus includes a filtering unit that extracts communication state information for indicating a communication state from the input data, and a signal processing unit of a sub-data processing unit that shifts the main-data processing unit to a sleep state or a normal state based on the communication state information.