Onboard communication system and communication method
AssigneesSumitomo Electric Industries, Ltd., Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd.
InventorsYuto Ueno, Susumu Takeshima
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Abstract
An in-vehicle communication system includes: an optical coupler; a first in-vehicle device group composed of a plurality of in-vehicle devices connected to a first end of the optical coupler; and a second in-vehicle device group composed of a plurality of in-vehicle devices connected to a second end of the optical coupler. The in-vehicle devices in the first in-vehicle device group are communicable with the in-vehicle devices in the second in-vehicle device group via a common transmission path in the optical coupler. The in-vehicle devices in the second in-vehicle device group are communicable with the in-vehicle devices in the first in-vehicle device group via a common transmission path in the optical coupler.
Claims9
An in-vehicle communication system comprising:
- an optical coupler;
- a first in-vehicle device group composed of a plurality of in-vehicle devices connected to a first end of the optical coupler;
- and
- a second in-vehicle device group composed of a plurality of in-vehicle devices connected to a second end of the optical coupler, wherein
- the plurality of in-vehicle devices in the first in-vehicle device group are communicable with the plurality of in-vehicle devices in the second in-vehicle device group via a common transmission path in the optical coupler, and
- the plurality of in-vehicle devices in the second in-vehicle device group are communicable with the plurality of in-vehicle devices in the first in-vehicle device group via a common transmission path in the optical coupler,
- wherein a master device, which is one in-vehicle device among the plurality of in-vehicle devices in the first in-vehicle device group, transmits timing information that is information to be used for a time synchronization process by the in-vehicle devices in the first and second in-vehicle device groups, to the second in-vehicle device group via the optical coupler,
- wherein one in-vehicle device among the plurality of in-vehicle devices in the second in-vehicle device group transmits the timing information received from the master device, to the first in-vehicle device group via the optical coupler,
- wherein the master device transmits, to the second in-vehicle device group via the optical coupler, slot information indicating time slots that are assigned to the respective in-vehicle devices in the first and second in-vehicle device groups, and
- wherein the one in-vehicle device among the plurality of in-vehicle devices in the second in-vehicle device group transmits the slot information received from the master device, to the first in-vehicle device group via the optical coupler.
A communication method in an in-vehicle communication system including,
- an optical coupler,
- a first in-vehicle device group composed of a plurality of in-vehicle devices connected to a first end of the optical coupler, and
- a second in-vehicle device group composed of a plurality of in-vehicle devices connected to a second end of the optical coupler,
- the method comprising:
- transmitting optical signals from the plurality of in-vehicle devices in the first in-vehicle device group to the plurality of in-vehicle devices in the second in-vehicle device group via a common transmission path in the optical coupler;
- and
- transmitting optical signals from the plurality of in-vehicle devices in the second in-vehicle device group to the plurality of in-vehicle devices in the first in-vehicle device group via a common transmission path in the optical coupler,
- wherein a master device, which is one in-vehicle device among the plurality of in-vehicle devices in the first in-vehicle device group, transmits timing information that is information to be used for a time synchronization process by the in-vehicle devices in the first and second in-vehicle device groups, to the second in-vehicle device group via the optical coupler,
- wherein one in-vehicle device among the plurality of in-vehicle devices in the second in-vehicle device group transmits the timing information received from the master device, to the first in-vehicle device group via the optical coupler,
- wherein the master device transmits, to the second in-vehicle device group via the optical coupler, slot information indicating time slots that are assigned to the respective in-vehicle devices in the first and second in-vehicle device groups, and
- wherein the one in-vehicle device among the plurality of in-vehicle devices in the second in-vehicle device group transmits the slot information received from the master device, to the first in-vehicle device group via the optical coupler.
Dependencies are inferred from the claim text.