Vehicular Ethernet Link Training Circuit State Transition
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Solution Overview
Problem
The current vehicular Ethernet connection establishment process is vulnerable to being stranded in a training state due to issues like a network cable coming off due to vibration or manual detachment, preventing further progress or regression in the connection procedure.
Innovation Solution
A method and circuit that include pre-training, training, and post-training steps to verify receiver statuses, such as counting, signal detection, signal level determination, and signal-to-noise ratio comparison, allowing the link procedure to return to a preceding step if conditions are not met, ensuring the connection does not get stuck in the training state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connection establishment process follows the current vehicular Ethernet proposal through training state verification, then the receiver statuses can be verified, but the link procedure may be strangled in the training state if cable issues occur
Solution Approach 1:
The patent introduces dynamic state transition mechanisms that allow the link procedure to adaptively change its behavior based on real-time training state conditions. The system dynamically adjusts between continuing training, returning to idle state, or transitioning to connected state based on verification results, preventing permanent strangulation in the training state.
Solution Approach 2:
The patent implements feedback mechanisms where the training state verification results are continuously monitored and fed back to control the state transition decisions. The system uses feedback from receiver status verification to determine whether to continue training, return to idle, or proceed to connected state, creating a closed-loop control system that prevents link procedure strangulation.
2Measurement precision
If the training state verification is performed strictly according to the proposal, then the receiver statuses are verified, but the connection procedure cannot move forward or go back when cable issues occur
Solution Approach 1:
The patent makes the connection procedure dynamically adaptable by introducing conditional state transitions. Instead of a rigid sequential process, the system can dynamically return to the idle state or proceed to connected state based on real-time verification outcomes, maintaining operational flexibility while preserving verification precision.
Solution Approach 2:
The patent inverts the traditional state transition logic by allowing backward transitions from training state to idle state under specific conditions. This inversion enables the system to exit the training state when verification fails or cable issues are detected, rather than being permanently stuck, thereby improving ease of operation while maintaining verification rigor.
3Reliability
If the link procedure remains in training state for verification, then receiver statuses can be checked, but the whole connection mechanism becomes paralyzed when issues occur
Solution Approach 1:
The patent introduces dynamic exit conditions from the training state that allow the system to leave the training state under specific conditions (verification success, verification failure, or cable issue detection). This dynamic approach prevents permanent paralysis while maintaining necessary verification, thereby preserving connection establishment productivity.
Solution Approach 2:
The patent implements feedback-based state transition control where verification results and cable status monitoring provide continuous feedback to determine whether to remain in or exit the training state. This feedback mechanism ensures that the system exits the training state appropriately, preventing paralysis and maintaining connection establishment efficiency.
Data Source
AI summary
The present invention discloses a network connection establishing method capable of preventing a link procedure from being strangled in a training state. An embodiment of the method comprises: a preceding step; a training step; and a following step. Said training step includes at least one of the following: counting a number, and returning to the preceding step if a local receiver is not yet ready after finishing counting the number; detecting a reception signal according to a signal detection level, and returning to the preceding step when none of the reception signal is detected; determining a number of level(s) of the reception signal, and returning to the preceding step if the number of level(s) is less than an expected level number; and comparing a signal-to-noise ratio of the reception signal with a signal-to-noise threshold, and returning to the preceding step when the signal-to-noise ratio fails to satisfy the signal-to-noise threshold.