Auto-Determination Protocol for Shared Interface Leader Follower Roles
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Solution Overview
Problem
Existing systems lack a protocol for dynamically determining leader and follower roles among physical layers in devices connected via a shared interface, making it difficult to add or reconfigure devices within a network, especially in automotive Ethernet systems.
Innovation Solution
Implementing an auto-determination protocol where each physical layer generates a unique toning signal based on a random number or unique identifier, allowing comparison to determine whether to operate as a leader or follower, enabling dynamic reconfiguration of leader and follower roles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared interface is used for data transmission between multiple devices, then device complexity and cable weight are reduced, but the ability to dynamically add or reconfigure devices is lost because leader and follower roles must be pre-assigned
Solution Approach 1:
The patent implements self-service by enabling physical layers to automatically determine their own leader or follower role through the toning signal comparison mechanism. Each physical layer generates a unique toning signal and compares it with others without external intervention, allowing the system to self-configure when devices are added or reconfigured, thus resolving the contradiction between simplified interface design and dynamic adaptability
Solution Approach 2:
The patent utilizes parameter changes by generating unique toning signals with different characteristics (such as frequency, phase, or amplitude) for each physical layer. The comparison of these signal parameters automatically determines role assignment, enabling dynamic reconfiguration without changing the basic shared interface structure, thereby maintaining low complexity while achieving high adaptability
2Reliability
If pre-assigned leader and follower roles are used, then initialization and link training protocols can proceed, but the system cannot accommodate topology changes, component additions, or replacements
Solution Approach 1:
The patent applies dynamics by transitioning from static pre-assigned roles to dynamic role determination. The toning signal comparison mechanism allows physical layers to dynamically assign themselves as leader or follower based on real-time conditions, enabling the system to adapt to topology changes, component additions, or replacements while maintaining reliable initialization protocols
Solution Approach 2:
The patent implements feedback through the toning signal comparison process, where each physical layer receives feedback about its relative timing or characteristic compared to others. This feedback loop enables automatic role determination and adjustment, allowing the system to maintain reliable operation during dynamic reconfiguration without requiring manual intervention
3Ease of operation
If manual configuration of leader and follower is required, then role assignment is controlled, but ease of operation and deployment is reduced especially in automotive Ethernet systems
Solution Approach 1:
The patent enables self-service configuration where physical layers automatically determine their own roles through toning signal comparison without requiring manual configuration. This self-organizing capability significantly improves ease of operation and deployment in automotive Ethernet systems while the automated nature of the process keeps the underlying protocol complexity manageable
Solution Approach 2:
The patent applies preliminary action by having physical layers generate and transmit their toning signals before actual data communication begins. This preliminary signal exchange automatically establishes role assignments in advance, simplifying deployment operations while the standardized preliminary protocol keeps the configuration process relatively simple despite the automated complexity
Data Source
AI summary
Methods, apparatus, systems, and articles of manufacture are described to facilitate determination of leader and follower for a shared interface. An example first physical layer includes interface circuitry configured to transmit a first signal to a second physical layer; comparator circuitry configured to compare a second signal from the second physical layer to the first signal; and configuration circuitry configured to facilitate operation as a leader or a follower based on the comparison.