Vehicle Control Device Bandwidth Optimization via Message Difference Recording
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Solution Overview
Problem
Conventional techniques for recording communication history in moving vehicles lead to increased network bandwidth consumption due to redundant data transmission, and existing methods like transmitting hash values face collisions and storage capacity reduction.
Innovation Solution
A control device and communication system that record difference information between replicated and received messages, excluding duplicate transmissions to reduce network bandwidth usage, by employing a recording device connected in a ring configuration and using sequence numbers for frame duplication and replication management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If communication history is recorded in a recording device connected to the network, then communication history recording is achieved, but network bandwidth consumption increases due to replicated message transmissions
Solution Approach 1:
The patent extracts only the necessary information (sequence numbers and replication identifiers) from replicated messages and transmits this extracted data to the recording device, rather than transmitting the entire replicated message content. This resolves the contradiction by achieving communication history recording while minimizing network bandwidth consumption.
Solution Approach 2:
The control device performs multiple functions: it generates replicated messages for redundant transmission, identifies replication relationships between messages, and transmits only differential information to the recording device. This multi-functionality allows the system to maintain reliability through replication while optimizing network bandwidth usage.
2Reliability
If message replication is implemented through different routes, then communication reliability is improved, but network bandwidth consumption increases
Solution Approach 1:
The patent creates simplified copies of replication information (sequence numbers and identifiers) rather than copying entire messages. These lightweight copies are transmitted to the recording device to establish replication relationships, maintaining communication reliability while significantly reducing network bandwidth consumption compared to full message replication.
3Loss of information
If all transmitted data is recorded, then complete communication history is achieved, but storage capacity is wasted due to redundant replicated data
Solution Approach 1:
The patent extracts and records only the essential replication identification information (sequence numbers and replication identifiers) rather than storing complete replicated messages. This allows the recording device to maintain complete communication history for accident analysis while minimizing storage capacity requirements by eliminating redundant data.
Solution Approach 2:
The system discards redundant replicated message content while retaining essential replication identification information. The recording device uses this extracted information to reconstruct and analyze communication history, achieving complete accident causation analysis capability while optimizing storage capacity by not storing duplicate message content.
Data Source
AI summary
According to one embodiment, a control device includes one or more processors. The one or more processors receive a message. The one or more processors determine whether the received message has been replicated and transmitted. The one or more processors instruct recording of difference information between a message before replication and the received message when it is determined that the received message has been replicated and transmitted.