Vehicle Communication System Using Situation-Based Attribute Lookup
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Solution Overview
Problem
In vehicle network systems, such as those using CAN, the limited data transmission capacity restricts the amount of information that can be communicated between electronic control units (ECUs), making it difficult to enhance functionality and convenience while maintaining efficient data communication.
Innovation Solution
A communication system that includes a vehicle situation detection unit, an information processing unit, and an attribute storage unit, which processes data by assigning attributes based on vehicle situations and positions within the communication message, allowing for efficient data processing without increasing the amount of communication data, using identifiers and situation codes to determine appropriate attributes for each piece of data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the amount of communication data is increased to enhance vehicle functionality and convenience, then more information can be transmitted between ECUs, but the communication system cannot accommodate larger data amounts due to CAN protocol restrictions
Solution Approach 1:
The patent embeds multiple layers of encoding within the communication message structure. Identifier information is nested within the message, and attribute information is further nested by associating it with the identifier. This nested structure allows rich information representation without increasing the fundamental data transmission capacity of the CAN protocol.
Solution Approach 2:
The patent adds a new dimension of information organization by introducing identifier-based attribute association. Instead of transmitting all attributes directly in the message, the system creates a reference dimension where identifiers point to stored attribute information, effectively expanding information capacity without increasing message size.
2Adaptability or versatility
If more information is transmitted to improve convenience, then vehicle functionality is enhanced, but the communication message size is restricted to 64 bits in CAN protocol
Solution Approach 1:
The patent extracts attribute information from the communication message and stores it separately in attribute information storage units associated with identifiers. This separation allows the message to remain within the 64-bit CAN protocol limit while the external storage provides unlimited attribute information capacity.
Solution Approach 2:
The patent introduces an intermediary identifier that mediates between the communication message and the attribute information storage. The identifier acts as a reference key, allowing ECUs to retrieve detailed attribute information without transmitting it directly in the message, thus bypassing the data size restriction.
3Productivity
If the same table data number is used across multiple ECUs for backlight adjustment, then communication efficiency is improved, but each ECU cannot have unique attribute settings
Solution Approach 1:
The patent enables different ECUs to have locally unique attribute information associated with the same identifier. While the identifier itself remains the same across ECUs for efficient communication, each ECU's attribute information storage unit can contain ECU-specific attributes, allowing individual configuration flexibility without sacrificing communication efficiency.
Data Source
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AI summary
A communication system that transmits and receives a message including an amount of data and an identifier determined for the contents of each data. The communication System includes a device that receives the message and includes an processor that processes data in the message, a detector that detects a vehicle situation, and an storage that stores attributes, wherein the storage stores an identification code, a situation code determined according to the vehicle situation, and an attribute determined corresponding to a combination of the identification code and the situation code as the attribute, and the processor acquires, based on a combination of the identification code corresponding to the identifier of the received message and the situation code corresponding to the vehicle situation detected by the detector, an attribute corresponding to the combination among the attributes stored in the storage, and processes data of the received message based on the acquired attribute.