In-Vehicle Network Switching for Time-Sliced Control and Data Traffic
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Solution Overview
Problem
The increase in the number of communication devices and transmission paths in existing SDN-based vehicle networks leads to higher costs and reduces flexibility and expansibility.
Innovation Solution
Implementing a system where control communication and data communication are performed on different time periods using a single communication path, with time slots allocated based on service type and vehicle state, managed by a network control device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control communication and data communication are performed on separate communication transmission paths, then communication reliability and control precision are improved, but the number of communication devices and transmission paths increases, leading to higher costs and reduced flexibility
Solution Approach 1:
The patent merges control communication and data communication onto a single communication transmission path by introducing a transmission path switch that dynamically allocates the shared path between control messages and service data based on priority and timing, thereby reducing the number of physical communication paths and devices while maintaining communication reliability through structured time-division multiplexing
Solution Approach 2:
The patent implements periodic time-division multiplexing where the transmission path switch alternates between control communication and data communication in predetermined time slots within each frame, allowing control messages and service data to share the same physical path while maintaining reliable communication through structured periodic allocation
2Manufacturing precision
If multiple communication transmission paths are used for control and data communication, then communication precision and reliability are improved, but the cost and system complexity increase
Solution Approach 1:
The patent introduces dynamic resource allocation where the transmission path switch can flexibly adjust the timing and allocation of communication resources based on real-time vehicle operating conditions, service priorities, and communication demands, allowing the system to maintain high communication control precision while adapting to varying operational requirements without requiring multiple dedicated paths for each scenario
Solution Approach 2:
The patent creates a universal communication path that serves multiple functions by implementing time-division multiplexing, where a single communication transmission path can handle both control communication and data communication for multiple services, thereby reducing system cost while maintaining the precision and reliability needed for different communication types through structured time slot allocation
Data Source
AI summary
An in-vehicle communication system includes: electronic control devices; communication transmission paths; a transmission path switch; and a network control device, the network control device includes: a control communication unit performing a control communication with the transmission path switch; and a control communication management unit managing an operation of the control communication in the control communication unit, each of the electronic control device includes: a data communication unit performing a data communication with another of the electronic control devices; and a data communication management unit managing an operation of the data communication in the data communication unit, and the control communication management unit and the data communication management unit manage the respective operations of the control communication unit and the data communication unit, such that the control communication and the data communication are performed on the communication transmission paths in different time periods.