A CANopen-based data transmission gateway changeover method includes: making an active gateway go alive, and mutually monitoring heartbeat packet status together with a standby gateway over an active-standby gateway communications network; keeping the active gateway alive and recording a breakdown of the standby gateway if no heartbeat packet of the standby gateway is detected within a preset heartbeat period and a heartbeat packet of the active gateway is successfully transmitted on the active-standby gateway communications network; requesting the standby gateway to go alive if the heartbeat packet of the active gateway fails to be transmitted on the active-standby gateway communications network; stopping requesting the standby gateway in a first in-vehicle communications network to go alive, and requesting the standby gateway to go alive; and keeping the active gateway alive and recording a breakdown of the standby gateway if still no response is received from the standby gateway.

A device for a serial bus system. The device includes a receiver for receiving a signal from a bus of the bus system, in which bus system at least one first communication phase and one second communication phase are used for exchanging messages between user stations of the bus system. For a message, the bus states of the signal received from the bus in the first communication phase are different from bus states of the signal received in the second communication phase. The receiver is designed to generate a digital signal from the signal received from the bus and to output the signal to a communication control device which evaluates data contained in the digital signal. The receiver uses a first reception threshold and a second reception threshold in each of the communication phases for generating the digital signal, and the second reception threshold has a negative voltage value.

The present disclosure discloses a CANopen-based data transmission gateway changeover method, system and apparatus. The method includes: making an active gateway go alive, and mutually monitoring heartbeat packet status together with a standby gateway over an active-standby gateway communications network; keeping the active gateway alive and recording a breakdown of the standby gateway if no heartbeat packet of the standby gateway is detected within a preset heartbeat period and a heartbeat packet of the active gateway is successfully transmitted on the active-standby gateway communications network; requesting, by the active gateway over any in-vehicle communications network, the standby gateway to go alive if the heartbeat packet of the active gateway fails to be transmitted on the active-standby gateway communications network; stopping requesting, by the active gateway if no response is received from the standby gateway, the standby gateway in a first in-vehicle communications network to go alive, and requesting, over another in-vehicle communications network, the standby gateway to go alive; and keeping the active gateway alive and recording a breakdown of the standby gateway if still no response is received from the standby gateway. In this way, sound operation of an entire train is ensured and redundancy effects of a train network are improved.

Apparatuses, methods, and computer-readable media are provided for operating a port manager to detect a first link condition or a second link condition of a circuitry. Under the first link condition, a first link between a downstream port of the circuitry and an upstream port of a switch is compatible to a first protocol, and a second link between a downstream port of the switch and an upstream port of a device is compatible to the second protocol. Under the second link condition, the first link exists and is compatible to the first protocol, while there is no second link being compatible to the second protocol. The port manager is to operate the downstream port of the circuitry according to the second protocol on detection of the first link condition, or according to the first protocol on detection of the second link condition. Other embodiments may be described and/or claimed.

Apparatuses, methods, and computer-readable media are provided for operating a port manager to detect a first link condition or a second link condition of a circuitry. Under the first link condition, a first link between a downstream port of the circuitry and an upstream port of a switch is compatible to a first protocol, and a second link between a downstream port of the switch and an upstream port of a device is compatible to the second protocol. Under the second link condition, the first link exists and is compatible to the first protocol, while there is no second link being compatible to the second protocol. The port manager is to operate the downstream port of the circuitry according to the second protocol on detection of the first link condition, or according to the first protocol on detection of the second link condition. Other embodiments may be described and/or claimed.

To provide a gateway device capable of continuing communication in the event of an abnormality without a redundant configuration as a system. A gateway device 100 includes a plurality of transceivers 110, 112, and 114 connected to a plurality of communication buses 1, 2, and 3 in a one-to-one manner, and a switch element 50 that connects the two communication buses 1 and 2 having different priorities among the plurality of communication buses.

For automatic device addressing, a processor configures each node device on a serial network for an order measurement. The processor further measures an order parameter for each of the node devices. The processor determines an order number of each of the node devices based on the order parameter for the node device.

To provide a gateway device capable of continuing communication in the event of an abnormality without a redundant configuration as a system. A gateway device 100 includes a plurality of transceivers 110, 112, and 114 connected to a plurality of communication buses 1, 2, and 3 in a one-to-one manner, and a switch element 50 that connects the two communication buses 1 and 2 having different priorities among the plurality of communication buses.

Systems and methods for configuring the operation of recording devices that may be removably mounted to a mount. A mount may provide a unique identifier. The unique identifier may be used to select a configuration profile for configuring the operation of the recording device coupled to the mount. A recording device that is moved from one mount to another may receive a different profile in accordance with the identifier of the new mount to control the operation of the recording device while mounted to the new mount. A server may store, retrieve, and provide profiles to recording devices.

An in-vehicle gateway communication method includes receiving a first message from a first in-vehicle device. An in-vehicle gateway identifies identification information in the first message, and matches the identification information with preset identification information stored in the in-vehicle gateway, and only when the matching succeeds, the in-vehicle gateway sends a second message, to indicate, using the second message, a second in-vehicle device to perform a target operation. When the identification information in the first message does not match the preset identification information stored in the gateway, the in-vehicle gateway does not send the second information to control the second in-vehicle device to perform the target operation. Therefore, identification information of a first message is set in an in-vehicle gateway of a vehicle.