In-vehicle communication system and vehicle
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Solution Overview
Problem
Conventional in-vehicle communication systems face limitations in bandwidth and communication quality due to electromagnetic interference, failing to meet the demands of autonomous driving and smart cockpits.
Innovation Solution
An in-vehicle communication system utilizing optical transmission with a first optical device providing optical carriers to multiple second optical devices, each with a distinct operating wavelength, and employing optical selection devices to separate and manage optical carriers, reducing the need for individual light sources and minimizing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional in-vehicle communication systems use CAN bus or LIN bus, then device complexity is reduced and ease of manufacture is improved, but bandwidth is limited and communication rate deteriorates
Solution Approach 1:
The patent replaces electrical signal transmission (CAN bus, LIN bus) with optical signal transmission using optical carriers. Optical fibers substitute traditional electrical wiring, enabling significantly higher communication rates while being immune to electromagnetic interference. This substitution fundamentally transforms the communication medium from electrical to optical domain.
Solution Approach 2:
The patent employs wavelength division multiplexing (WDM) technology, where multiple optical carriers with different wavelengths are transmitted simultaneously through the same optical fiber. By changing the wavelength parameter of optical carriers, the system achieves multi-channel high-speed communication, dramatically increasing overall bandwidth and communication rate without requiring separate physical channels for each data stream.
2Productivity
If conventional in-vehicle communication systems increase bandwidth, then communication rate is improved, but electromagnetic wave interference increases and communication quality deteriorates
Solution Approach 1:
The patent substitutes electrical signal transmission with optical signal transmission. Optical carriers transmitted through optical fibers are inherently immune to electromagnetic interference that plagues traditional electrical bus systems. This substitution eliminates the harmful electromagnetic wave interference while maintaining or increasing bandwidth capacity.
Solution Approach 2:
The patent introduces optical fibers as an intermediary medium between communication nodes. Optical fibers serve as a shielded transmission medium that isolates signals from external electromagnetic interference and prevents internal interference between multiple channels, enabling high-bandwidth communication without quality degradation.
3Reliability
If optical carriers are transmitted through optical channel, then communication quality is improved and electromagnetic interference is reduced, but device complexity increases due to optical selection devices
Solution Approach 1:
The patent designs optical selection devices that can handle multiple wavelengths and multiple data channels through a single unified structure. These devices perform wavelength routing, signal switching, and channel management functions simultaneously, reducing the need for separate components for each function and thereby managing complexity while maintaining high communication quality.
Solution Approach 2:
The patent divides the optical communication system into modular functional units including optical carriers, optical channels, and optical selection devices. Each module performs a specific function and can be independently optimized or replaced. This segmentation manages overall system complexity by creating manageable, standardized building blocks that can be configured flexibly.
4Productivity
If multiple second optical devices are connected to optical channel with different wavelengths, then communication bandwidth is improved, but ease of operation deteriorates due to wavelength management complexity
Solution Approach 1:
The patent implements automatic wavelength assignment and management mechanisms where the system monitors available wavelengths and dynamically assigns them to different optical devices. This feedback-based management automates the complex task of wavelength allocation, reducing manual configuration effort and simplifying operation while supporting multi-wavelength high-bandwidth communication.
Solution Approach 2:
The optical selection devices and optical carriers are designed to automatically manage wavelength routing and channel allocation without requiring manual intervention. The system self-configures wavelength assignments based on traffic demands and available resources, making wavelength management transparent to users and simplifying operation while maintaining high bandwidth utilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves high communication rates and quality while ensuring applicability and practicality in vehicle environments, overcoming the limitations of conventional systems.
Implementation Method 1
the in-vehicle communication system is based on optical transmission, a high-speed data stream formed by optical carriers can be used to meet a high-bandwidth communication requirement
Implementation Method 2
The N second optical devices correspond to N different first operating wavelengths... An optical selection device i connected to the second optical device i in the N optical selection devices is configured to transmit the second optical carrier i in the received first optical carrier to the second optical device i
Implementation Method 3
A second optical device i in the N second optical devices is configured to receive a second optical carrier i in the first optical carrier from the optical channel, and transmit a first optical signal i obtained through modulation based on the second optical carrier i back to the optical channel
Data Source
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AI summary
The present disclosure provides an in-vehicle communication system and a vehicle. The in-vehicle communication system includes a first optical device, N second optical devices, and an optical channel. Two ends of the optical channel are connected to the first optical device. The optical channel is further connected to the N second optical devices respectively. The N second optical devices correspond to N different first operating wavelengths. The first optical device is configured to transmit a first optical carrier to the optical channel. A wavelength of the first optical carrier includes the N first operating wavelengths. A second optical device i in the N second optical devices is configured to receive a second optical carrier i in the first optical carrier from the optical channel, and transmit a first optical signal i obtained through modulation based on the second optical carrier i back to the optical channel. A wavelength of the second optical carrier i is same as a first operating wavelength i corresponding to the second optical device i. The in-vehicle communication system provided in the present disclosure has a high communication rate, good communication quality, and strong applicability and practicality in an in-vehicle communication scenario.