In-vehicle network system
An in-vehicle network system includes an upper device, a first intermediate device, and a first lower device. The first intermediate device includes a first communication unit and a second communication unit that are arranged redundantly and that have a communication function. The first intermediate device is configured to communicate with the upper device via a plurality of communication paths. The first lower device is connected to the first communication unit and the second communication unit of the first intermediate device.
1. An in-vehicle network system comprising:
an upper device;
a first intermediate device including a first communication unit and a second communication unit that are arranged redundantly and that have a communication function, the first intermediate device being configured to communicate with the upper device via a plurality of communication paths; and
a first lower device connected to the first communication unit and the second communication unit of the first intermediate device.
2. The in-vehicle network system according to claim 1 , wherein:
the first intermediate device is configured to function as a gateway that relays communication between the upper device and the first lower device;
the upper device is configured to create control data for controlling an actuator mounted on a vehicle and transmit the control data to the first lower device via the first intermediate device; and
the first lower device is configured to control the actuator based on the control data.
3. The in-vehicle network system according to claim 1 , wherein:
the in-vehicle network system includes a plurality of intermediate devices including the first intermediate device; and
the upper device and the intermediate devices are connected to each other by a communication line provided in a ring.
4. The in-vehicle network system according to claim 1 , wherein the first lower device includes a first lower communication unit connected to the first communication unit of the first intermediate device, and a second lower communication unit connected to the second communication unit of the first intermediate device.
5. An in-vehicle network system comprising:
an upper device;
a second intermediate device including a first communication unit and a second communication unit that are arranged redundantly and that have a communication function, the second intermediate device being configured to communicate with the upper device via a plurality of communication paths;
a second lower device connected to the first communication unit of the second intermediate device; and
a third lower device connected to the second communication unit of the second intermediate device and having a function equivalent to a function of the second lower device.
6. An in-vehicle network system, comprising:
an upper device;
a first intermediate device that includes a first communication unit having a communication function and that is configured to communicate with the upper device via a plurality of communication paths;
a third intermediate device that includes a third communication unit having a communication function and that is configured to communicate with the upper device via a plurality of communication paths; and
a first lower device connected to the first communication unit and the third communication unit.
7. An in-vehicle network system comprising:
an upper device;
a second intermediate device that includes a second communication unit having a communication function and that is configured to communicate with the upper device via a plurality of communication paths;
a fourth intermediate device that includes a fourth communication unit having a communication function and that is configured to communicate with the upper device via a plurality of communication paths;
a second lower device connected to the second communication unit; and
a third lower device connected to the fourth communication unit and having a function equivalent to a function of the second lower device.