Abstract: An information of a network to which a new function unit has been added is easily acquired. A relay device installed in a vehicle includes: a detection unit configured to detect a new function unit being a function unit that is newly added to a network including an existing function unit being one or a plurality of function units; a relay unit configured to relay a frame between the function units; and an acquisition unit configured to acquire, from the frame, relayed by the relay unit, between the new function unit detected by the detection unit and the existing function unit, function unit information that includes information regarding a network configuration of a layer of a lower order than an application layer, the function unit information being of at least one of the new function unit and the existing function unit.

Abstract: A management device to be used in an in-vehicle network including a plurality of function units installed in a vehicle includes: a state information acquisition unit configured to acquire state information indicating a state of the vehicle; and an allocation unit configured to change allocation of transmission bands of a plurality of logical paths between the function units in accordance with the state of the vehicle indicated by the state information acquired by the state information acquisition unit.

Abstract: An in-vehicle device includes: a processing unit configured to perform time synchronization between own device, which is the in-vehicle device, and another device, which is another in-vehicle device, based on a data propagation delay time between the other device and the own device, and detect occurrence of an update event regarding the propagation delay time, wherein in a case where the processing unit detects occurrence of the update event, the processing unit requests time information used for updating the propagation delay time from the other device.

Abstract: Time synchronization is performed between the vehicle-mounted device and another device that is another vehicle-mounted device based on a data propagation delay time between the vehicle-mounted device and the other device. The vehicle-mounted device includes: a processing unit configured to receive, from the other device, request information that requests time information used for updating the propagation delay time, and transmit the time information to the other device; and a detection unit configured to detect an abnormality related to time synchronization, and acquire information regarding the detected abnormality.

Abstract: A relay device mounted to a vehicle includes a plurality of function units. The relay device includes: an authentication processing unit configured to acquire authentication information of a function unit from an external device outside the vehicle, and perform an authentication process regarding the function unit by using the acquired authentication information; and a relay processing unit configured to, on the basis of a result of the authentication process performed by the authentication processing unit, relay information between the function unit and another function unit. When a validity time limit of the authentication information has expired, the authentication processing unit acquires, from the external device, the authentication information that is new.

Abstract: In a system including a plurality of in-vehicle networks, information regarding the network configuration of function units connected to different types of transmission paths can be easily used. A relay device includes: an acquisition unit configured to acquire second function unit information of the function unit connected to the second transmission path, the second function unit information being function unit information that includes information regarding a network configuration of a layer of a lower order than an application layer; and a conversion unit configured to perform a conversion process of converting the second function unit information acquired by the acquisition unit into information that is able to be registered into a database of one or a plurality of pieces of first function unit information being function unit information of one or a plurality of the function units each connected to a corresponding first transmission path.

Abstract: An information of a network to which a new function unit has been added is easily acquired. A relay device installed in a vehicle includes: a detection unit configured to detect a new function unit being a function unit that is newly added to a network including an existing function unit being one or a plurality of function units; a relay unit configured to relay a frame between the function units; and an acquisition unit configured to acquire, from the frame, relayed by the relay unit, between the new function unit detected by the detection unit and the existing function unit, function unit information that includes information regarding a network configuration of a layer of a lower order than an application layer, the function unit information being of at least one of the new function unit and the existing function unit.

Abstract: A plurality of signal display lamps 1A to 1E are communicably connected together through a network 3. Each of the signal display lamps 1A to 1E includes a display portion 12 capable of performing a variable display. Each of the signal display lamps 1A to 1E is capable of performing a mirroring operation in addition to being capable of performing a variable display in the display portion 12 in response to an input signal that is input from input signal lines 8A to 8E. For example, in the signal display lamp 1A, any of the signal display lamps 1B to 1E is selected, and its display state can be simulated. Each of the mirroring source signal display lamps 1B to 1E can be selected by giving a selective command signal from a selective-command-signal generating device 60 connected to the input signal line 8 of the signal display lamp 1A.