Vehicle Network Communication Management for Collision Avoidance
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Solution Overview
Problem
In vehicle networks, simultaneous transmission of communication data with shared identification information can lead to data collisions and network errors, disrupting smooth communication due to misuse or misidentification of identification information by external devices.
Innovation Solution
A communication management apparatus and method that includes a detection unit to identify simultaneous transmission of data with shared identification information and an adjustment unit to modify transmission timing or identification information, preventing collisions and maintaining network stability by ensuring unique identification and prioritization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If identification information is shared among multiple devices for communication, then communication versatility is improved, but data collisions and network errors occur due to simultaneous transmission
Solution Approach 1:
The communication management apparatus performs preliminary detection of simultaneous transmission conditions before actual data collision occurs. By detecting the transmission timing and identification information of multiple devices in advance, the system can preemptively manage potential conflicts and maintain network reliability while allowing versatile shared identification usage.
Solution Approach 2:
The system continuously monitors the vehicle network for transmission activities and provides feedback when simultaneous transmissions with shared identification information are detected. This feedback mechanism enables dynamic adjustment of communication management strategies, resolving the contradiction between versatile shared ID usage and reliable collision-free transmission.
2Adaptability or versatility
If external devices are allowed to connect to the vehicle network, then communication functionality is enhanced, but unauthorized data transmission and network security risks increase
Solution Approach 1:
The communication management apparatus acts as an intermediary between external devices and the vehicle network. It monitors transmission sources, detects unauthorized devices impersonating legitimate in-vehicle control apparatuses, and manages communication accordingly. This intermediary function enables enhanced communication functionality while mitigating security risks through active surveillance and control.
3Adaptability or versatility
If the number of in-vehicle control apparatuses is increased, then system functionality is improved, but communication load increases causing delays
Solution Approach 1:
The communication management apparatus performs preliminary detection of transmission conditions before actual transmission occurs. By identifying potential simultaneous transmissions and managing them in advance, the system reduces communication delays that would otherwise occur due to collisions and retransmissions, thereby supporting increased system functionality without proportional increase in communication load.
Data Source
AI summary
A plurality of in-vehicle control apparatuses (100) and a DLC (200) connected to a vehicle network each include a frame monitoring unit (131). The frame monitoring units (131) detect simultaneous transmission of a plurality of communication data having a shared CAN ID by monitoring an error frame transmitted to the vehicle network. The plurality of in-vehicle control apparatuses (100) and the DLC (200) also each include a control determination unit (132) and a transmission/reception control unit (133) that execute adjustment processing to adjust the plurality of communication data having the shared CAN ID when simultaneous transmission of the communication data is detected.