Communication system and communication method
First Claim
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1. A communication system comprising:
- a plurality of distribution apparatuses, each of which is connected with an Electronic Control Unit (ECU) group including a plurality of ECUs that send and receive data, whereineach distribution apparatus comprises;
a receiving unit that receives a plurality of data sent from the connected ECU group during a receiving period;
a storage unit that stores the plurality of data received by the receiving unit and a received order of the received plurality of data;
a sending unit that sends data among the plurality of data stored by the storage unit toward an ECU in the ECU group and sends another data among the plurality of data stored by the storage unit toward another ECU in the ECU group during a sending period, based on the received order stored by the storage unit, anda synchronizing unit that synchronizes the storage unit with a storage unit of another distribution apparatus among the plurality of distribution apparatuses during a synchronizing period, whereina cycle including the receiving period, the sending period, and the synchronizing period is repeated.
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Abstract
GW apparatuses send messages including data being sent from ECUs to a distribution apparatus without sending to an ECU. The distribution apparatus stores the messages on a database, and sends the messages to an ECU, and an ECU. In a case, the distribution apparatus sends the messages in a message sending order and the GW apparatuses relays the messages being sent from the distribution apparatus to the ECUs. The message sending order may be an order in which the distribution apparatus receives the messages an ascending (descending) order of values corresponding to message IDs applied to the messages or an ascending order of message received time of the messages.
25 Citations
12 Claims
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1. A communication system comprising:
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a plurality of distribution apparatuses, each of which is connected with an Electronic Control Unit (ECU) group including a plurality of ECUs that send and receive data, wherein each distribution apparatus comprises; a receiving unit that receives a plurality of data sent from the connected ECU group during a receiving period; a storage unit that stores the plurality of data received by the receiving unit and a received order of the received plurality of data; a sending unit that sends data among the plurality of data stored by the storage unit toward an ECU in the ECU group and sends another data among the plurality of data stored by the storage unit toward another ECU in the ECU group during a sending period, based on the received order stored by the storage unit, and a synchronizing unit that synchronizes the storage unit with a storage unit of another distribution apparatus among the plurality of distribution apparatuses during a synchronizing period, wherein a cycle including the receiving period, the sending period, and the synchronizing period is repeated. - View Dependent Claims (2, 3, 4, 5)
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6. A communication system comprising:
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a plurality of distribution apparatuses, each of which is connected with an Electronic Control Unit (ECU) group including a plurality of ECUs that send and receive data, wherein each distribution apparatus comprises; a receiving means for receiving a plurality of data sent from the connected ECU group during a receiving period; a storing means for storing the plurality of data received by the receiving means and a received order of the received plurality of data; a sending means for sending data among the plurality of data stored by the storing means toward an ECU in the ECU group and sending another data among the plurality of data stored by the storing means toward another ECU in the ECU group during a sending period, based on the received order stored by the storing means, and a synchronizing means that synchronizes the storing means with a storing means of another distribution apparatus among the plurality of distribution apparatuses during a synchronizing period, wherein a cycle including the receiving period, the sending period, and the synchronizing period is repeated. - View Dependent Claims (7, 8, 9, 10)
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11. A communication method using a communication system having a plurality of distribution apparatuses, each of which is connected with another distribution apparatus and an Electronic Control Unit (ECU) group including a plurality of ECUs that send and receive data, comprising the steps performed by a distribution apparatus among the plurality of distribution apparatuses:
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receiving a plurality of data sent from a distribution apparatus'"'"' own connected ECU group during a receiving period; storing the plurality of data sent from the distribution apparatus'"'"' own connected ECU group and a received order of the plurality of data; storing a plurality of data sent from another distribution apparatus among the plurality of distribution apparatuses; and sending stored data among the plurality of stored data in toward an ECU in the distribution apparatus'"'"' own connected ECU group during a sending period, based on the stored received order, wherein the communication method further comprises steps performed by another distribution apparatus among the plurality of distribution apparatuses including; sending another data among the plurality of stored data toward an ECU in its own connected ECU group during the sending period based on the stored received order; and synchronizing the storage unit with a storage unit of the another distribution apparatus among the plurality of distribution apparatuses during a synchronizing period, wherein a cycle including the receiving period, the sending period, and the synchronizing period is repeated. - View Dependent Claims (12)
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Specification