Abstract: An in-vehicle communication system includes a first switching device and a second switching device each configured to relay, via a transmission path, information between a plurality of function units mounted to a vehicle. Upon being supplied with a power source voltage via a power-source-dedicated line from a power source device mounted to the vehicle, the first switching device supplies a power source voltage via the transmission path to one or a plurality of the function units and the second switching device that are connected to the first switching device, and the second switching device extracts a power source voltage from the transmission path, and supplies a power source voltage via the transmission path to one or a plurality of the function units that are connected to the second switching device.

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: A network having a new configuration is flexibly constructed through a simple process while ensuring security in the network. A setting device includes: an acquisition unit configured to acquire an authentication result regarding a new function unit serving as a function unit newly added to an in-vehicle network including one or a plurality of function units; and a setting unit configured to, when the authentication result acquired by the acquisition unit is affirmative, perform a setting process for allowing the new function unit and an existing function unit serving as a function unit included in the in-vehicle network before the new function unit is added thereto, to perform communication via a plurality of relay devices capable of relaying information between the function units, the setting process being regarding at least one of the relay devices, the existing function unit, and the new function unit.

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: An on-board computer includes a physical resource having a communication unit which communicate with an on-board control device through an on-board communication line, a control unit, and a storage unit. The on-board computer further includes a connection unit to which an external device is to be connected; and a management processing unit configured to generate a virtual control device by allocating the physical resource in a case where the external device is connected to the connection unit, wherein the virtual control device operates as a virtual on-board control device that controls an operation of the external device connected to the connection unit, and that is connected to the on-board communication line.

Abstract: An in-vehicle communication system is an in-vehicle communication system to be mounted on a vehicle, and includes: a gateway performing relay processing involving communication protocol conversion; and one or a plurality of switching devices performing relay processing not involving the communication protocol conversion, the gateway or the switching device manages data update of a target device mounted on the vehicle, the gateway receives update data for the target device from an external device disposed outside the vehicle, transmits, to the switching device connected thereunder, the update data for the target device, which is connected to the switching device, not holding the update data at least after completing the update, and holds the update data for the target device, which is connected thereto, also after completing the update not through the switching device.

Abstract: A relay device performs relay processing of relaying data between a plurality of function units mounted on a vehicle and includes a counting unit that counts each of the numbers of relayed packets that are the numbers of packets relayed to respective target function units being the plurality of function units of a same type in the relay processing and a detection unit that monitors a count value of the numbers counted by the counting unit and detects unauthorized communication with the target function units based on a maximum value and a minimum value of the numbers of relayed packets counted by the counting unit.

Abstract: This on-vehicle communication device includes: a storage unit configured to store correspondence information indicating a correspondence relationship between an address and a port number; and a communication unit configured to perform, by using the correspondence information, filtering of a packet having been received. A target port number which is a port number of a target instrument is registered in advance in the correspondence information. In the filtering, the communication unit selectively allows a packet that includes the target port number, to pass. The communication unit performs an address registration process of acquiring an address from the packet that includes the target port number and registering, into the correspondence information, the acquired address in association with the target port number. In the filtering after the address registration process, the communication unit selectively allows a packet that includes the target port number and the corresponding address, to pass.

Abstract: An on-vehicle communication system includes: a plurality of function units; and one or a plurality of switch devices, each switch device being configured to perform a relay process of relaying communication data between the function units. When unauthorized communication by a function unit has been detected, the switch device performs a validation process of validating a function unit other than an unauthorized-communication function unit that is the function unit for which the unauthorized communication has been detected.

Abstract: This on-vehicle communication device includes: a storage unit configured to store correspondence information indicating a correspondence relationship between an address and a port number; and a communication unit configured to perform, by using the correspondence information, filtering of a packet having been received. A target port number which is a port number of a target instrument is registered in advance in the correspondence information. In the filtering, the communication unit selectively allows a packet that includes the target port number, to pass. The communication unit performs an address registration process of acquiring an address from the packet that includes the target port number and registering, into the correspondence information, the acquired address in association with the target port number. In the filtering after the address registration process, the communication unit selectively allows a packet that includes the target port number and the corresponding address, to pass.

Abstract: A relay device performs relay processing of relaying data between a plurality of function units mounted on a vehicle and includes a counting unit that counts each of the numbers of relayed packets that are the numbers of packets relayed to respective target function units being the plurality of function units of a same type in the relay processing and a detection unit that monitors a count value of the numbers counted by the counting unit and detects unauthorized communication with the target function units based on a maximum value and a minimum value of the numbers of relayed packets counted by the counting unit.

Abstract: An in-vehicle communication system is an in-vehicle communication system to be mounted on a vehicle, and includes: a gateway performing relay processing involving communication protocol conversion; and one or a plurality of switching devices performing relay processing not involving the communication protocol conversion, the gateway or the switching device manages data update of a target device mounted on the vehicle, the gateway receives update data for the target device from an external device disposed outside the vehicle, transmits, to the switching device connected thereunder, the update data for the target device, which is connected to the switching device, not holding the update data at least after completing the update, and holds the update data for the target device, which is connected thereto, also after completing the update not through the switching device.