Vehicle-Mounted Ethernet SDN Routing for Deterministic Data Transmission
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Solution Overview
Problem
Ensuring efficient transmission of a large amount of data in a vehicle's Electrical/Electronic Architecture (EEA) as vehicle functions become more complex and the number of sensors increases.
Innovation Solution
Implementing a centralized vehicle-mounted Ethernet architecture with a Software-Defined Network (SDN) and Time-Sensitive Software-Defined Network (TSSDN) to manage and schedule internal resources, utilizing an SDN controller and switches to dynamically control network traffic, and employing a time-sensitive protocol to prioritize data transmission based on packet type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional distributed EEA architecture is used, then device complexity is reduced, but data transmission efficiency deteriorates when handling large amounts of data
Solution Approach 1:
The patent segments the network control function from the data transmission function by introducing an SDN controller that centrally manages network resources while switches handle data forwarding. This segmentation allows complex resource scheduling to be centralized without burdening individual network nodes, thereby improving overall data transmission efficiency while maintaining manageable device complexity at each node.
Solution Approach 2:
The SDN controller acts as an intermediary between the network infrastructure and application requirements. It receives resource scheduling requests, determines optimal transmission paths based on real-time network state, and configures switches accordingly. This intermediary layer enables efficient data transmission through intelligent routing without requiring complex decision-making at each switch, thus resolving the contradiction between transmission efficiency and device complexity.
2Adaptability or versatility
If network resources are statically allocated, then device complexity is reduced, but adaptability to changing network requirements deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the SDN controller continuously monitors network state (bandwidth usage, latency, packet loss) and adjusts transmission paths and resource allocation in real-time. This dynamic approach allows the network to adapt to changing requirements such as varying data loads and prioritization needs, while the centralized control architecture keeps the complexity manageable by automating the adjustment process rather than requiring complex local decision-making at each node.
3Reliability
If data transmission prioritization is not implemented, then device complexity is reduced, but reliability of critical information transmission deteriorates
Solution Approach 1:
The patent applies local quality by assigning different service levels to different data packets based on their importance. Critical packets (e.g., safety-related communications) are assigned high priority with guaranteed bandwidth and low latency, while non-critical packets receive standard or lower priority. The SDN controller implements this differentiation by configuring switches to prioritize specific traffic flows, ensuring reliable transmission of critical information without requiring complex prioritization logic at each network node, thus maintaining manageable device complexity.
Data Source
AI summary
A data transmission method applied to a vehicle. The data transmission method includes obtaining performance information of a link between adjacent switches in the electronic appliance architecture of the vehicle-mounted Ethernet, determining a weight of the link between the adjacent switches, based on the performance information of the link, obtaining objective addresses of data packets, determining objective paths of the data packets transmitted from an objective switch to the objective address, based on the weight of the link between the adjacent switches, generating flow entries based on the objective paths. The flow entries indicating the data packets are transmitted on the objective paths and sending the flow entries to the objective switch. An electronic appliance architecture of the vehicle-mounted Ethernet and an electronic device are also disclosed.