Dual-Network In-Vehicle System for Autonomous Driving
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Solution Overview
Problem
Conventional in-vehicle systems face challenges in ensuring appropriate communication for autonomous driving, particularly with the increasing demand for diverse devices and complex communication protocols, leading to potential communication bottlenecks and reduced reliability.
Innovation Solution
The implementation of a dual-network system within the in-vehicle system, where the first network uses protocol conversion for communication between autonomous driving system devices and the controller using multiple protocols, and the second network communicates directly using a single protocol, with a detector hub aggregating information from multiple detectors to enhance communication efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single network with protocol conversion is used to connect autonomous driving devices and controller, then protocol compatibility is improved, but communication speed and reliability deteriorate due to protocol conversion overhead and potential bottlenecks
Solution Approach 1:
The communication network is divided into two separate networks: a first network using a first protocol for general communication, and a second network using a second protocol for autonomous driving control. This segmentation eliminates protocol conversion requirements within each network, ensuring high reliability and speed for autonomous driving commands while maintaining protocol compatibility through dedicated networks.
Solution Approach 2:
A gateway device acts as an intermediary between the first network and second network, performing protocol conversion only when necessary for cross-network communication. This mediator approach minimizes protocol conversion overhead by limiting it to boundary transitions rather than throughout the entire communication path.
2Adaptability or versatility
If protocol conversion is used for communication between autonomous driving devices and controller, then multi-protocol support is improved, but communication speed deteriorates due to conversion overhead
Solution Approach 1:
The system segments communication paths into dedicated networks: the first network handles non-time-critical communication using protocol conversion capabilities, while the second network handles time-critical autonomous driving commands using a single protocol without conversion, ensuring maximum speed for safety-critical operations.
Solution Approach 2:
Different communication quality requirements are addressed locally: the second network is optimized for high-speed, low-latency autonomous driving control with single-protocol direct communication, while the first network provides multi-protocol support for other vehicle systems, allowing each network to have tailored characteristics for its specific function.
3Loss of information
If multiple detectors are connected directly to the controller, then detection information availability is improved, but communication complexity and bottleneck risk increase
Solution Approach 1:
A detector hub serves as an intermediary device that aggregates detection information from multiple detectors and forwards consolidated data to the autonomous driving controller. This mediator approach reduces communication complexity by consolidating multiple detector connections into a single hub-to-controller link, while maintaining full detection information availability through the hub's aggregation function.
Data Source
AI summary
An in-vehicle system includes: an autonomous driving system device that is mounted in a vehicle and implements autonomous driving of the vehicle; an autonomous driving controller that is configured to control the autonomous driving system device to perform a control related to the autonomous driving of the vehicle; a first network that connects the autonomous driving system device and the autonomous driving controller with a protocol conversion unit interposed therebetween so as to perform communication with each other by using a plurality of different protocols; and a second network that connects the autonomous driving system device and the autonomous driving controller without the protocol conversion unit interposed therebetween so as to perform communication with each other by using a single protocol.