Automotive Ethernet Ring Topology for Flexible ECU Networking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional vehicle communication systems face challenges with complex and heavy wire harnesses that add cost, weight, and complexity, limiting efficient wiring and communication, especially with increasing numbers of electronic control units (ECUs), and result in uneven distribution of computing power and bandwidth constraints.
Innovation Solution
Implementing an Ethernet ring topology with distributed Ethernet gateways connected by Automotive Ethernet cables, encapsulating and decapsulating automotive bus protocols within Ethernet packets, and using virtual local area networks (VLANs) to facilitate flexible ECU placement and logical distribution of computing power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional wire harnesses are used to connect ECUs, then communication between systems is established, but the system adds significant weight, cost, and complexity to the vehicle
Solution Approach 1:
The patent replaces the traditional mechanical wire harness system with an Ethernet-based communication network. Ethernet gateways are introduced to interface between legacy automotive bus protocols (CAN, LIN, FlexRay) and modern Ethernet protocols, enabling high-speed digital communication while dramatically reducing physical wiring complexity and vehicle weight.
Solution Approach 2:
Ethernet gateways serve as intermediary devices that bridge legacy automotive communication buses and the new Ethernet network. These gateways perform protocol conversion, packet encapsulation, and routing functions, allowing seamless integration of existing ECUs while enabling Ethernet-based communication throughout the vehicle network.
2Adaptability or versatility
If more ECUs are added to support sophisticated vehicle systems, then vehicle functionality is improved, but wire harness complexity and bandwidth constraints increase
Solution Approach 1:
The Ethernet network provides a universal communication infrastructure that can accommodate multiple ECUs and diverse communication protocols through a single standardized medium. The high bandwidth of Ethernet (supporting 100 Mbps to 10 Gbps) enables simultaneous data transmission between numerous ECUs without requiring separate dedicated wiring for each connection, thus supporting increased vehicle functionality while managing wiring complexity.
3Ease of operation
If computing power is centralized in traditional architectures, then system control is simplified, but bandwidth constraints and communication bottlenecks occur
Solution Approach 1:
The patent implements a distributed computing architecture where computing power is segmented across multiple ECUs rather than centralized in a single control unit. The Ethernet network enables these distributed ECUs to communicate efficiently, with routing protocols directing data packets to appropriate destinations. This segmentation allows parallel processing and reduces communication bottlenecks while maintaining system control through standardized Ethernet protocols and gateway management.
Data Source
AI summary
A vehicle communication system comprises: Ethernet gateways, wherein each of the Ethernet gateways (i) is designated to serve as the Ethernet gateway in addition to performing other automotive functions in a vehicle; (ii) is coupled to multiple buses for respective subsystems having electronic control units (ECUs) communicating using respective automotive bus protocols; and (iii) is configured to encapsulate within Ethernet packets received communications of the respective automotive bus protocols; Automotive Ethernet cables connecting the Ethernet gateways in a ring topology, each of the Ethernet gateways connected to two others of the Ethernet gateways that are adjacent to the Ethernet gateway; and a communication matrix in each of the Ethernet gateways, wherein each of the ECUs is specified as belonging to at least one of multiple virtual local area networks (VLANs), wherein a VLAN tag is included in each of the Ethernet packets.