Switch Register Control for Vehicle Image Switching
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Solution Overview
Problem
Current vehicle image switch systems require extensive wire harnesses and high-performance ECUs, leading to increased cost and power consumption, and when applying SDN, the lack of quick response due to the need for sensor connections and information upload limits the system's ability to quickly switch images based on vehicle states.
Innovation Solution
A switch with a register and control entry holding part that selects and applies control entries to packets based on register values and match conditions, allowing for dynamic adjustment of register values in response to packet instructions, enhancing quick response in SDN networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SDN controller comprehends vehicle states to control image switching, then image switching accuracy is improved, but response time deteriorates due to sensor connections and information upload requirements
Solution Approach 1:
The patent extracts the vehicle state information requirement from the SDN controller and places it directly in the switch device. The switch now holds register values representing vehicle states locally, eliminating the need for the controller to comprehend vehicle states through sensor connections and information upload, thereby resolving the contradiction between switching accuracy and response time
Solution Approach 2:
The patent introduces register values as an intermediary between the vehicle state sensors and the SDN controller. Instead of the controller directly accessing sensor data, the switch uses locally stored register values to determine image switching, achieving both accurate switching and quick response without requiring controller-comprehended vehicle states
2Power
If high-performance ECU processes multiple camera images, then image processing capability is improved, but power consumption increases
Solution Approach 1:
The patent segments the image processing function from the high-performance ECU and assigns it to the switch device. The switch now performs image selection and switching based on register values, eliminating the need for continuous high-performance ECU processing of all camera images, thereby reducing power consumption while maintaining processing capability when needed
Solution Approach 2:
The switch device performs image switching autonomously using locally stored register values without requiring continuous ECU intervention. This self-service approach allows the system to maintain image processing capability through the switch while reducing overall power consumption by eliminating the need for high-performance ECU to continuously process all camera feeds
3Measurement precision
If multiple cameras with high resolution are deployed, then image quality is improved, but wire harness length increases
Solution Approach 1:
The patent makes the switch device multi-functional by enabling it to perform both network switching and image selection based on register values. This allows the system to use the existing switch infrastructure for image routing without requiring additional dedicated hardware or extensive wire harness modifications, thereby maintaining high image quality while reducing wire harness requirements
Data Source
AI summary
A switch comprises: a register; a control entry holding part that holds control entries set by a predetermined control apparatus; a packet processing part that selects a control entry to be applied to a received packet by referring to a value on the register in addition to match conditions for the control entry; a register change part that changes the value on the register in a case where a change instruction for the value on the register is set to the control entry selected.