Abstract: An electric power is supplied to a slave ECU by a master ECU turning on a switch provided in a power supply line of the slave ECU. An activation notification message including an identifier of the slave ECU is transmitted to a communication network to which the master ECU and the slave ECU are connected when the slave ECU receives electric power supply and is activated. It is diagnosed whether the at least one slave ECU has been properly assembled based on the activation notification message transmitted to the communication network.

Abstract: An in-vehicle network system includes a relay device connecting communication lines to each other and nodes connected to the communication lines. Each of the nodes is configured to enter a wake-up state when the node in the sleep state receives a wake-up signal through the communication line. At least one of the nodes as a requesting node is configured to transmit the wake-up signal. Activation target data is set for each of the nodes. The activation target data for one node indicates at least one other node that is required to activate together with the one node. The relay device obtains the activation target data for the requesting node when receiving the wake-up signals from the requesting node, synthesize the activation target data to generate activation request data, select a target node in accordance with the activation request data, and transmit the wake-up signal to the target node.

Abstract: An electronic controller receives power from a power source through a power switch. The electronic controller includes an end notification unit and a sleep transition unit. The end notification unit transmits an end notification to a power supply controller when a predetermined disconnection condition is met. The predetermined disconnection condition indicates the power switch connected to the electronic controller is allowed to switch to a disconnected state. The sleep transition unit puts the electronic controller into a sleep mode when the sleep transition unit does not receive the communication frame from any one of communication devices connected to the electronic controller for a predetermined reception determination period after the disconnection condition was met.

Abstract: A communication system includes interconnected multiple electronic controllers. At least one thereof is a multiple-circuits controller including a first electronic circuit device, a second electronic circuit device, a first power switch, a second power switch, a management frame exchange unit, and a power supply control unit. The first power switch switches between a first connected state and a first disconnected state. The second power switch switches between a second connected state and a second disconnected state. The management frame exchange unit exchanges a management frame including first switching information and second switching information. The power supply control unit switches the first power switch between the first connected state and the first disconnected state according to the first switching information and switches the second power switch between the second connected state and the second disconnected state according to the second switching information.

Abstract: A communication system includes a first controller and a second controller connected to each other. The first controller receives electric power from a power source through a switch. The second controller includes a current detection unit, a management frame obtaining unit, a state comparing unit, and a diagnostic process executing unit. The current detection unit detects a consumed current value by the first controller. The management frame obtaining unit obtains a management frame including activation information of the first controller. The state comparing unit determines whether a first state based on the consumed current value and a second state based on the activation information of the first controller are inconsistent with each other. The diagnostic process executing unit performs, when the first state and the second state are inconsistent with each other, at least one of (i) storing diagnostic information and (ii) transmitting a notification of the diagnostic information.

Abstract: A communication system includes a first controller and a second controller connected to each other. The first controller receives electric power from a power source through a power switch. The second controller includes a current detection unit, the management frame obtaining unit, the disconnection determination unit, and the power supply disconnection unit. The current detection unit detects a consumed current value of the first controller. The management frame obtaining unit obtains a management frame including activation information of the first controller. The disconnection determination unit determines, based on the consumed current value and the activation information, whether a predetermined disconnection condition is met. The power supply disconnection unit switches the power switch to a disconnected state when the disconnection determination unit determines that the disconnection condition is met.

Abstract: A battery controller is equipped with a primary antenna used in radio communication between itself and battery monitors. Each of the battery monitors is equipped with a secondary antenna used in radio communication between itself and the battery controller. Each of the secondary antennas and/or the primary antenna is configured to selectively have a first antenna directivity that is one of a plurality of directivities whose center axes are different in orientation from each other. The first antenna directivity excludes one of the directivities which causes a degree of quality of radio communication between the primary antenna and a corresponding one of the secondary antennas to be minimized or the lowest among the directivities on a channel used for the radio communication.

Abstract: A communication system comprises a plurality of communication nodes that relay failure diagnosis communication of a diagnosis request and a diagnosis result between a request source of a failure diagnosis and a request destination of the failure diagnosis. At least one of the communication nodes is configured to determine whether current communication is the failure diagnosis communication, and to pack a first communication frame of a first communication protocol whose use is defined in a communication standard of the failure diagnosis into a second communication frame of a second communication protocol having a higher communication speed than the first communication protocol.

Abstract: A battery control device includes a parent-device-side storage unit, a parent-device-side communication unit and an identification unit. The parent-device-side storage unit is configured to store parameters related to communication quality of wireless communication between the battery monitoring devices and the battery control device when batteries, battery monitoring devices and the battery control device are arranged in a predetermined arrangement state in an accommodation section; the parameters are associated respectively with the battery monitoring devices. The parent-device-side communication unit is configured to perform the wireless communication with the battery monitoring devices.

Abstract: A communication system includes a plurality of electronic control devices connected to be capable of transmitting and receiving a communication frame. The electronic control devices includes a power supply switching device configured to receive a power supply from a power source via a power supply switching section and a management device connected to the electronic control devices to be capable of transmitting and receiving a communication frame, and is configured to control an operation of one or a plurality of power supply switching sections. At least one of the electronic control devices includes a frame generation section configured to generate a management frame that is a communication frame and a frame transmission section configured to transmit the management frame.

Abstract: A communication system includes a plurality of communication nodes that relay fault diagnosis communication of a diagnosis request and q diagnosis result between a request source and a request destination of the fault diagnosis. A communication setting unit of one of the communication nodes increases a priority of a priority parameter indicating the priority of communication when a communication determination unit determines that the present communication is the fault diagnosis communication either when transmitting the diagnosis request or when transmitting the diagnosis result.

Abstract: A communication system includes a first control device that receives a power supply from a power source via a power supply switching section configured to switch between a conduction state and a cutoff state and a second control device that is data-communicably connected to the first control device and controls an operation of the power supply switching section. The second control device includes a state confirmation section that determines whether the first control device is in a cutoff-allowable state and a power supply control section that brings the power supply switching section into the cutoff state when the state confirmation section determines that the first control device is in the cutoff-allowable state.

Abstract: A communication system includes a slave control device that receives a power supply from a power source via a first power supply switching section, a first power supply switching control section configured to receive a power supply from the power source via a second power supply switching section and control an operation of the first power supply switching section, a second power supply switching control section configured to control an operation of the second power supply switching section, a switching transmission section configured to transmit first switching instruction information indicating whether to bring the first power supply switching section into the first conduction state to the first power supply switching control section; and a power supply control section configured to bring the second power supply switching section into either the second conduction state or the second cutoff state based on the management frame.

Abstract: A communication system includes: a first control device receiving electric power supply from a power source via an electronic fuse; a second control device connected to the first control device for data communication; and a management device connected to the first and second control devices for data communication and controlling the electronic fuse. The management device performs at least one of: transmitting power source pre-cutoff notification information to the second control device notifying that the electric power supply will be cut off before turning off the electronic fuse; and transmitting power source post-cutoff notification information notifying that the electric power supply has been cut off after turning off the electronic fuse.

Abstract: A communication system includes a first control device that receives a power supply from a power source via a first electronic fuse, a second control device that is data-communicably connected to the first control device and receives a power supply from the power source via a second electronic fuse, a management device that is data-communicably connected between the first control device and the second control device; a switching control section configured to execute switching control to switch the first electronic fuse and the second electronic fuse between an on state and an off state, a diagnostic information storage section configured to store diagnostic information related to communication with the first control device, and a state information storage section configured to store first fuse state information related to a state of the first electronic fuse, which is referred to for invalidating the diagnostic information.

Abstract: A first device receives an electric power from a battery via an electronic fuse. A second device is connected to the first device to transmit and receive a frame. A third device controls the operation of the electronic fuse. The first and second devices store a diagnosis mask table. The diagnosis mask table defines, for each of communication groups, one or more combinations of a device whose electric power supply via the electronic fuse is cut off, a device which enters a sleep state, and a communication frame that is not received. The third device determines an activation group based on acquired activation trigger information. The third device transmits the communication frame indicating the determined activation group to the first and second devices.

Abstract: A communication system includes a master communication device and a plurality of slave communication devices. The master communication device obtains, for each of the plurality of slave communication devices, multiple communication characteristics during wireless communication. The communication system further includes a storage unit storing multiple reference communication characteristics. The system determines an abnormality in wireless communication between the at least one master communication device and each of the plurality of slave communication devices based on strength of correlation between (a) an overall trend of the obtained multiple communication characteristics and (b) an overall trend of the multiple reference communication characteristics stored in the storage unit.

Abstract: A communication system includes a master communication device and slave communication devices. The master communication device obtains information indicative of communication characteristics. The communication system records a combination of the master communication device and at least one of the slave communication devices having a communication abnormality. The system finalizes an abnormal position where the abnormality is occurring when an abnormality-determined position is consistent with a recorded combination of the master communication device and the at least one of the slave communication devices having a communication abnormality.

Abstract: A wireless communication system is mounted on a mobile body, and includes: a master device; and a slave device that performs a wireless communication with the master device while switching a frequency channel. The master device determines whether the frequency channel is available. The master device reflects a result of frequency channel availability determination in a use of the frequency channel.

Abstract: A network system includes at least one transmission path and a plurality of terminal devices each connected to the transmission path. Each of the terminal devices includes a transceiver, a startup processing unit, and a switching unit. The transceiver is configured to operate either one of a first standby unit and a second standby unit according to a switching instruction. The switching unit is configured to output the switching instruction to the transceiver to operate the second standby unit when a transmission path empty period lasts for a predetermined preparation time or more after a non-designation period has lasted for a predetermined operation determination time or more.