US 2010/0138493 A1 · VEHICLE-MOUNTED COMMUNICATION SYSTEM

Abstract

A communication network in which a plurality of terminals are connected to a common bus is a vehicle-mounted communication system which connects a plurality of ECUs though the bus, transmits messages at predetermined communication intervals between the ECUs, and receives the transmitted messages. The messages transmitted/received between the ECUs through a CAN communication line are divided into a plurality of groups such as a first group, a second group to an Nth group according to the type of message information. Each of the ECUs is provided with a transmission timing operation part for computing the transmission timing for each message group to be transmitted. The transmission timing operation part adjusts so as to bring the transmission timing of message belonging to the first group transmitted from its own ECU closer to the transmission timing of message belonging to the first group received from another electronic control unit.

Claims8

Dependent claims

-5. (canceled)

A communication system to be mounted on a car having a communication network in which a plurality of terminals is connected to a common bus, a plurality of electronic control units is connected to one another via said bus, and messages are sent among said electronic control units at predetermined transmission intervals and said sent messages are received thereby,

wherein said messages sent and received among said electronic control units via said bus are divided into a plurality of groups such as a first group, a second group, . . . and an Nth group in dependence on a kind of message information;
each of said electronic control units has a transmission timing operation part computing transmission timings of messages of each group to be sent;
and
said transmission timing operation part makes transmission timings of messages, belonging to the same group, which are to be sent from one of said electronic control units closer to transmission timings of messages, belonging to the same group, which are received from said other electronic control units than transmission timings of messages belonging to other groups.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

12/451,472Filed 13 Nov 2008

Priority

JP 2007 31046130 Nov 2007

Published

3 Jun 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04L 67/12
Protocols: specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in…
H04L 12/4135
With random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]: using bit-wise arbitration
H04L 2012/40215
Characterized by the use of a particular bus standard: controller Area Network CAN
H04L 2012/40273
Bus for use in transportation systems: the transportation system being a vehicle

Vehicle-mounted communication system

Life of this patent

Vehicle-mounted communication system

Life of this patent

Abstract

Claims8