Abstract: A master station (111) and a slave station (121) each communicate an individually set, fixed number of communication frames in a cyclic period. The communication frame contains, as communication information, a sequence number and a period number. The master base station (113) and the slave base station (123) determine, upon communication of each communication frame in a wireless manner, if there is a missing communication frame on a basis of the communication information of a this-time communication frame and the communication information of a last-time communication frame. When there is a missing communication frame, a history management server (300) records communication history information of the last-time communication frame and of the this-time communication frame, as preceding/succeeding history information.

Abstract: A driving assistance system includes a roadside server connected to a roadside sensor and a roadside device. The roadside server includes a sensor information processing unit, an assistance information generation unit, and a roadside device interface. Using information indicating a state in the detection range of the roadside sensor from the roadside sensor, the sensor information processing unit generates sensing information of a first dynamic object within the detection range. The assistance information generation unit generates driving assistance information by combining surrounding object information and the sensing information. The roadside device interface transmits the driving assistance information to the roadside device.

Abstract: An application server delivers dynamic map information to a mobile object that receives the dynamic map information, the dynamic map information being information of a dynamic map that is used for execution of fully automated driving under a specific condition. When the mobile object executes a handover from a base station capable of transmitting the dynamic map information in a first area to a base station capable of transmitting the dynamic map information in a second area, in a case where the mobile object is in fallback operation in which simultaneous communication with the base stations is unavailable, the application server delivers the dynamic map information to the mobile object via the base station and a mobile object capable of receiving the dynamic map information from the base station.

Abstract: A virtual map generation unit (112) generates a virtual map of a subjected area by dividing the subjected area into role areas each of which corresponds to each of a plurality of roles, based on the number of vehicles scheduled to travel in the subjected area specified from work plan information on a transportation work of loads by a vehicle and based on the number of loads scheduled to be placed in the subjected area specified from the work plan information. A distribution unit (115) distributes to the vehicle traveling in the subjected area, the virtual map generated by the virtual map generation unit (112).

Abstract: A server device includes a support information generation unit, a condition determination unit, and a resource calculation unit. The support information generation unit generates support information for each support-provided area using information from a communication terminal. The condition determination unit determines a support information generation condition being a condition concerning the support information to be generated by the support information generation unit, based on area situation information representing a situation thereof.

Abstract: A communication resource allocation device (10) identifies a hazardous behavior that may cause a traffic accident and has occurred in each of monitoring target areas included in a communication area of a base station (20) in a past reference period, so as to determine a hazard level for each of the monitoring target areas. The communication resource allocation device (10) allocates communication resources to each of the monitoring target areas based on the determined hazard level. The communication resource allocation device (10) distributes information to a roadside device (30) and an in-vehicle device (40) in each of the monitoring target areas, using the allocated communication resources.

Abstract: A communication management device (10) estimates communication quality between a control device (30) mounted on a moving object (70) and a driving assistance device (20) to provide a driving assistance service for the control device (30), at a scheduled time when the moving object (70) passes through a communication area, which includes a scheduled path where the moving object (70) passes. The communication management device (10) notifies the driving assistance device (20) when the communication quality is outside a range of quality being a standard. When it is notified, the driving assistance device (20) changes the driving assistance service to be provided for the control device (30).

Abstract: The information transmission control device according to the present disclosure is for controlling a position to start transmitting probe data to a server; the information transmission control device uses a vehicle's current lane segment information and history information about the vehicle's having transmitted probe data, to set a transmission interval distance and an offset for changing a position to start transmitting probe data. By using the transmission interval distances and the offsets, transmission start positions to transmit probe data are shifted on a running unit basis or on a vehicle basis. Therefore, while the vehicle stops, multiple data transmission at the same position does not occur. This can reduce the communication cost, and makes it possible to obtain information evenly on the travel route.

Abstract: A communication apparatus determines a transmission mode to specify a priority order of a plurality of types of vehicle information for each traveling section, based on each transmission speed in one or more traveling sections. The communication apparatus selects a transmission mode at a position where a vehicle is traveling, from among transmission modes in each traveling section. The communication apparatus transmits the plurality of types of vehicle information in accordance with the priority order specified in the selected transmission mode.

Abstract: A conventional portable terminal device identifies a specific place where the use of a mobile phone is prohibited only from electromagnetic waves generated from equipment with a motor and a vehicle, etc., or equipment with a digital circuit and a treatment apparatus, etc., and the radio wave emission is uniformly stopped in the specific place. Therefore, since an operating environment is not taken into consideration, a problem arises in that communication cannot be restricted in accordance with a purpose. A portable terminal device is provided with: a direct wireless communication unit to perform direct communication permitted for a specific purpose; a determination unit to determine whether or not an operating environment of the device is an operating environment to permit the direct communication; and a control unit to control the direct communication by the direct wireless communication unit on the basis of a determination result of the determination unit.

Abstract: The information transmission control device according to the present disclosure is for controlling a position to start transmitting probe data to a server; the information transmission control device uses a vehicle's current lane segment information and history information about the vehicle's having transmitted probe data, to set a transmission interval distance and an offset for changing a position to start transmitting probe data. By using the transmission interval distances and the offsets, transmission start positions to transmit probe data are shifted on a running unit basis or on a vehicle basis. Therefore, while the vehicle stops, multiple data transmission at the same position does not occur. This can reduce the communication cost, and makes it possible to obtain information evenly on the travel route.

Abstract: A communication apparatus determines a transmission mode to specify a priority order of a plurality of types of vehicle information for each traveling section, based on each transmission speed in one or more traveling sections. The communication apparatus selects a transmission mode at a position where a vehicle is traveling, from among transmission modes in each traveling section. The communication apparatus transmits the plurality of types of vehicle information in accordance with the priority order specified in the selected transmission mode.

Abstract: A communication apparatus 1 is provided with a first communication interface 11, second communication interfaces 12 connected to a plurality of access routers 3 connected to an Internet 6, and a route determination unit which, for a packet being communicated from the first communication interface 11 to the second communication interfaces 12, determines the second communication interface 12 in accordance with an elapsed time since connecting start of a connection with a destination of the packet. Connections having started within a predetermined time are treated as connections constituting one user session. Therefore, connections constituting the same user session can be communicated via the same access router without the need of analyzing a protocol of a layer.

Abstract: A communication control device (7) is mounted on a moving body in which a plurality of application programs to communicate with an external device are deployed. A scheduling unit (403) schedules, for each of the application programs, using a position on a traveling route of the moving body, a communication timing at which each of the application programs communicates with the external device, based on a communication distance cycle and the traveling route, the communication distance cycle being a distance cycle prescribed for each of the application programs and applicable when each of the application programs communicates with the external device. The timing process unit (404) determines, for each of the application programs, whether or not the moving body has arrived at a position of the communication timing, and when the moving body arrives at the position of the communication timing for any of the application programs, notifies a corresponding application program that the communication timing has come.

Abstract: A communication apparatus 1 is provided with a first communication interface 11, second communication interfaces 12 connected to a plurality of access routers 3 connected to an Internet 6, and a route determination unit which, for a packet being communicated from the first communication interface 11 to the second communication interfaces 12, determines the second communication interface 12 in accordance with an elapsed time since connecting start of a connection with a destination of the packet. Connections having started within a predetermined time are treated as connections constituting one user session. Therefore, connections constituting the same user session can be communicated via the same access router without the need of analyzing a protocol of a layer.

Abstract: An alarm monitoring device monitors, when a failure has occurred in a transmission device or a transmission line, an alarm transmitted from a transmission device that has detected the failure. The alarm monitoring device includes: an alarm database for recording therein information included in the alarm, the information being on a detected time, a generated location, an alarm importance, and an ID of a path having the generated location as a route; and a monitoring control unit configured to register information of a received alarm in the alarm database, extract one alarm from the alarm database for each path ID based on an alarm importance and a detected time, determine the detected time as an alarm generation time, associate a path ID of the extracted alarm with the alarm generation time and the alarm importance, and cause to display the path ID as an alarm-generating path list.

Abstract: Respective nodes N1 to N3 only detect a carrier, and the node N3 sets a random time between a time after a certain period of time t1 and a time until a certain period of time t2 after the carrier of data D11 is gone as a waiting time so as to transmit data within this waiting time. The node N2 transmits ACK data D12 with respect to the data D11 to the node N1 before the certain period of time t1 after the carrier of the data D11 is gone. The node N3 detects the carrier of the ACK data D12 and again sets a random time after the certain period of time t1 until the certain period of time t2 to transmit the data.

Abstract: Nodes (N1 to N3) include MTU length calculation sections (31 to 33) which multiply baud rates (D21 to D23) of communication parameters (D11 to D13) set based on results of negotiation with other nodes (N1 to N3) by a communication regulated time used in timer control for transmission/reception, and which calculate MTU lengths as maximum packet lengths of the packets based on the multiplication results so that transmission times of the packets for the destination nodes are equal to each other, and also include communication control sections (21 to 23) which divide data to be transmitted to destination nodes into packets having the calculated MTU length to transmit the packets.

Abstract: To obtain a remote authentication system that securely authenticates with protecting biometrics information, which is user's personal information, and is firm on security when performing authentication of a person with the biometrics information, and a remote authentication method. The present invention encrypts biometrics information that is user's personal information, and transfers the biometrics information over a network in such a state that only an authentication server, which the user assigns, can decode the biometrics information. Therefore, it is possible to securely protect user's privacy that is the biometrics information in a style of reflecting user's intention, and to prevent reuse of invalid authentication information since it is possible to confirm the date and time, when the authentication information was generated, by the authentication server.

Abstract: The communication system conducts communication among nodes N1 to N4 that form a communication network of bus type by using set communication parameters. The communication system includes one master node N1 selected from among the nodes N1 to N4; and one or more slave nodes N2 to N4 that are nodes N2 to N4 other than the master node N1, the one or more slave nodes logically star-connected to the master node N1, each of the one or more slave nodes conducting communication with another node N2 to N4 via the master node N1 by using communication parameters negotiated with the master node N1.