ADAS Camera Service Extension for Protocol Violation Recovery
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Solution Overview
Problem
In automotive systems, hardware freezes or gets stuck in an error state due to protocol violations, necessitating a costly software intervention for reset, leading to frame loss and inefficiency.
Innovation Solution
A camera service extension (CSE) protocol is introduced to handle protocol violations without requiring hardware resets, allowing hardware to recover from packet errors autonomously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardware reset is performed to recover from protocol violations, then system reliability is improved, but system downtime increases and productivity decreases
Solution Approach 1:
The CSE protocol enables the hardware to autonomously detect and recover from protocol violations without requiring external software intervention. The protocol includes error detection mechanisms that automatically identify violations and trigger recovery procedures, allowing the system to self-correct and continue operation with minimal downtime.
Solution Approach 2:
The CSE protocol establishes predetermined error handling procedures and recovery mechanisms that are prepared in advance. When protocol violations occur, the system can immediately execute pre-planned recovery actions rather than requiring software intervention, thereby reducing system downtime while maintaining reliability.
2Stability of the object's composition
If hardware reset is performed to handle protocol violations, then system stability is improved, but frame loss increases and productivity decreases
Solution Approach 1:
The CSE protocol enables autonomous error detection and recovery at the hardware level, allowing the system to maintain stability while avoiding the productivity loss associated with hardware resets. The protocol continuously monitors for violations and automatically corrects them without interrupting the frame processing pipeline.
Solution Approach 2:
By implementing the CSE protocol, the system can maintain continuous frame processing operation even when protocol violations occur. The error recovery mechanisms work in the background without stopping the useful action of frame processing, thereby maintaining productivity while ensuring system stability.
3Reliability
If software intervention is used to reset hardware, then error recovery is achieved, but device complexity and operational cost increase
Solution Approach 1:
The CSE protocol transfers error detection and recovery functionality from software to hardware, eliminating the need for complex software intervention mechanisms. The protocol is implemented directly in the hardware logic, simplifying the overall system architecture while maintaining robust error recovery capabilities.
Solution Approach 2:
The CSE protocol acts as an intermediary layer between the hardware and software, handling error detection and recovery at the protocol level. This eliminates the need for complex software-hardware interaction mechanisms and simplifies the overall system while maintaining reliable error recovery.
Data Source
AI summary
Aspects presented herein relate to methods and devices for communication including an apparatus, e.g., a vehicle. The apparatus may detect at least one protocol violation for a first frame in a set of frames. The apparatus may also refrain from sending data associated with the first frame based on the detection of the at least one protocol violation for the first frame. The apparatus may also output an indication of the at least one protocol violation for the first frame.