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US 6,151,306 AGranted
Vehicle multiplex communication system
AssigneeYazaki Corporation
InventorsKazuyoshi Ogasawara, Makoto Uda
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AssigneeYazaki Corporation
InventorsKazuyoshi Ogasawara, Makoto Uda
Estimating the term…
A vehicle communication multiplex system comprises: a bus; and a plurality of nodes connected to the bus, wherein transmission right circulates to the nodes in a predetermined order and send a predetermined number of data to the bus from the node which gets the transmission right. Each of the nodes includes, a block division section for dividing the data into blocks to prepare data blocks, a change-block-determination section for determining whether or not each of the data blocks prepared by the block division section changes as an event occurs, and a data transmission section, if the change-block-determination section determines that a data block changes, for extracting the data block from the block division section and sending the extracted data block to the bus.
A vehicle communication multiplex system comprising:
A vehicle communication multiplex system comprising:
A vehicle communication multiplex system comprising:
A vehicle communication multiplex system comprising:
A vehicle communication multiplex system comprising:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
With decentralised control: with deterministic access, e.g. token passing
Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy…:…
Bus for use in transportation systems: the transportation system being a vehicle
Technologies relating to charging of electric vehicles: information or communication technologies improving the operation of electric vehicles
Term ended 12 Mar 2018 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This invention relates to a vehicle multiplex communication system comprising a plurality of nodes on board of a vehicle connected to a bus and circulating the transmission right to the nodes in a predetermined order for the node getting the transmission right to send a predetermined number of data pieces to the bus.
In a vehicle such as an automobile, a plurality of electronic control nodes (electronic control units) are connected to a common bus and data is transferred between the nodes. In this case, token passing for circulating the transmission right to the nodes in a predetermined order for the node getting the transmission right to send a predetermined number of data pieces to the bus is known.
An art of an on-board electronic control system adopting this type of token passing is described, for example, in Unexamined Japanese Patent Application Publication No. Sho 62-51331, wherein a plurality of electronic control units are connected to one signal line and send a predetermined number of data pieces to the signal line in a predetermined order. Each electronic control unit is configured as shown in FIG. 12.
FIG. 1 is a block diagram to show the configuration of a first embodiment of a vehicle multiplex communication system of the invention;
FIG. 2 shows an example of shortening a frame by dividing data in the first embodiment of the invention;
FIG. 3 is a timing chart of data transmission at nodes in the first embodiment of the invention;
Referring now to the accompanying drawings, there are shown preferred embodiments of a vehicle multiplex communication system of the invention.
<First embodiment>
FIG. 1 is a block diagram to show the configuration of a first embodiment of a vehicle multiplex communication system of the invention. In the vehicle multiplex communication system shown in FIG. 1, a first node 1a, a second node 1b, and a third node 1c are connected to a bus 3 in a network and a predetermined necessary number of data pieces are transferred from one node to another by token passing. That is, the transmission right is circulated to the nodes 1a-1c in a predetermined order and the node getting the transmission right sends a predetermined number of data pieces to the bus 3.