Vehicle Data Communication Network Managing Unit
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Solution Overview
Problem
Existing vehicle data communication systems face increased costs and transmission errors due to excessive data transmission when sending vehicle data externally, particularly with CAN communication, which also leads to high system load from compression algorithms and inefficient use of wireless communication resources.
Innovation Solution
A vehicle data communication method and apparatus that preprocesses data using a network managing unit to transmit only changed data, reducing redundant transmissions and optimizing wireless communication by including packet number, bit number, and data length information, and periodically transmitting entire data to ensure data integrity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If entire vehicle data is transmitted through wireless communication, then data collection completeness is improved, but transmission cost increases and transmission errors occur frequently
Solution Approach 1:
The patent extracts and transmits only the changed portions of data (difference data) rather than the entire data set. The network managing unit compares current data with previously transmitted data and identifies only the portions that have changed, transmitting solely these differential portions to reduce transmission volume and cost while maintaining data completeness.
Solution Approach 2:
The patent segments the data transmission process into identification of changed portions and transmission of only those segments. The data is divided into changed and unchanged portions, with only the changed segments being transmitted through the wireless communication unit, thereby reducing overall transmission requirements.
2Quantity of substance
If compression algorithm is used for large data transfer, then transmission data amount is reduced, but system load increases due to encoding and decoding
Solution Approach 1:
Instead of applying compression algorithms to the entire data set, the patent extracts only the changed portions of data and transmits these differential portions. This approach reduces the quantity of data requiring compression and decompression operations, thereby lowering the computational load on both the transmitting vehicle controller and the receiving server while maintaining efficient data transfer.
3Ease of operation
If CAN communication is used for data transmission, then data communication inside vehicle is established, but transmission data amount excessively increases
Solution Approach 1:
The patent integrates with the existing CAN communication system to extract only the changed portions of data from the continuous data stream. The network managing unit identifies which data elements have changed since the last transmission and extracts only these portions for wireless transmission, thereby utilizing the established CAN communication infrastructure while significantly reducing the amount of data that needs to be transmitted externally.
4Reliability
If duplicated transmission data is sent to ensure reliability, then transmission error resistance is improved, but wireless communication resource efficiency decreases
Solution Approach 1:
The patent transmits only the changed portions of data rather than duplicating entire data sets. By extracting and transmitting only the differential portions that have changed, the system maintains transmission reliability through selective retransmission of only necessary data while significantly improving the efficiency of wireless communication resources compared to transmitting duplicated complete data sets.
Data Source
AI summary
A vehicle communication system includes at least one vehicle controller configured to control functions of a vehicle and configured to output data related to the vehicle. A communication unit is configured to transmit the data output from the vehicle controller to an external data collecting device. A memory is configured to store the data. A network managing unit is configured to control the communication unit to output the data to the data collecting device when the data is different from previous data transmitted to the data collecting device.