Vehicle Data Relay Device for OTA Update Load Reduction
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Solution Overview
Problem
The increasing size and complexity of vehicle electronic control systems, combined with the need for frequent program updates, lead to increased processing loads on communication networks and center devices, particularly when managing campaign information and performing OTA updates.
Innovation Solution
A vehicle electronic control system that includes a data relay device and a campaign information delivery control method, where the tool functions as an edge server to relay data between the center device and the master device, reducing the processing load by synchronizing individual vehicle and configuration information, and adjusting campaign information settings based on vehicle state to minimize user intervention in update phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If OTA update technology is implemented with vehicle master device as relay device, then program update capability is enabled, but processing load of communication network increases due to data communication between center device and vehicle master device
Solution Approach 1:
A data relay device (tool) is introduced as an intermediary between the center device and the vehicle master device. The tool receives campaign information from the center device, determines whether settings need modification based on stored vehicle information, and relays the information to the master device. This intermediary approach distributes the processing load away from the communication network while maintaining the OTA update capability.
2Device complexity
If campaign information management is centralized at center device, then update control is simplified, but processing load of center device increases
Solution Approach 1:
The campaign information management function is segmented between the center device and the data relay device. The center device retains responsibility for issuing campaign information, while the data relay device handles the determination of setting modifications and relay operations. This segmentation reduces the processing load on the center device while maintaining simplified update control through coordinated operation.
Solution Approach 2:
The data relay device autonomously determines whether campaign information settings need to be changed by comparing received information with stored vehicle information, without requiring constant center device intervention. This self-service capability reduces the processing load on the center device while maintaining proper update control.
3Reliability
If detailed campaign information is delivered to all vehicles, then update completeness is ensured, but communication network load increases
Solution Approach 1:
The data relay device pre-stores individual vehicle information and configuration information before campaign information delivery. When campaign information arrives, the tool immediately determines whether settings need modification using this pre-stored information, avoiding the need to transmit all detailed information over the network and ensuring update completeness through prior preparation.
Data Source
AI summary
A vehicle electronic control system includes a center device and a master device and a data relay device capable of performing data communication therebetween. The center device obtains campaign information of the program update, transmits the obtained campaign information to the data relay device, and transmits the update data to the data relay device. When receiving the campaign information from the center device, the data relay device changes setting of the received campaign information and delivers the information to the master device, and, when receiving the update data from the center device, the data relay device delivers the received update data to the master device. When receiving the campaign information from the data relay device, the master device instructs a target electronic control device to update the program with the update data received from the data relay device according to the received campaign information.