LIN Master Node Reassignment Using Authenticated Role Switching
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Solution Overview
Problem
Existing Local Interconnect Network (LIN) systems face limitations due to static role assignments of master and slave nodes, leading to potential failures, reduced adaptability, and inefficient network management, particularly when network modifications or dynamic reassignments are needed.
Innovation Solution
A method and system for dynamically reassigning master and slave nodes in a LIN network through cryptographic authentication and configuration updates, allowing seamless role transitions based on real-time monitoring and network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static role assignments are used in LIN systems, then system simplicity is maintained, but adaptability and fault tolerance are reduced
Solution Approach 1:
The patent implements dynamic role assignment where master and slave nodes can switch roles based on real-time network conditions. The system continuously monitors performance metrics and automatically triggers role reassignment when degradation is detected, transforming the static master-slave architecture into a dynamic one that adapts to changing conditions without manual intervention.
Solution Approach 2:
The system incorporates feedback mechanisms where nodes monitor their own performance and the overall network health. Performance data is collected, analyzed, and used to trigger role reassignment decisions. The feedback loop ensures that role changes are based on actual network conditions rather than predetermined schedules, enabling adaptive response to faults and performance degradation.
2Reliability
If dynamic role reassignment is implemented, then fault tolerance and adaptability are improved, but authentication complexity and security requirements increase
Solution Approach 1:
The patent implements preliminary authentication actions before allowing role reassignment. Nodes must prove their identity and authorization before the system permits master-slave role switching. This preliminary verification ensures that only authorized nodes can initiate role changes, preventing unauthorized access while enabling dynamic reassignment for fault tolerance.
Solution Approach 2:
The system introduces an intermediary authentication mechanism that mediates between nodes during role reassignment. The intermediary verifies credentials, validates authorization, and coordinates the role switch process. This intermediary layer simplifies the authentication complexity by centralizing verification logic and ensuring secure transitions without requiring direct trust between all nodes.
3Reliability
If role reassignment is triggered by performance degradation, then network reliability is improved, but response time and processing delays increase
Solution Approach 1:
The system performs preliminary monitoring and analysis of network conditions continuously, preparing role reassignment decisions in advance. Performance metrics are collected and evaluated before actual degradation occurs, allowing the system to preemptively switch roles when thresholds are approached. This preliminary action reduces response time by eliminating the need for reactive analysis during critical moments.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining continuous monitoring and evaluation of network performance. The role reassignment process is designed to minimize interruptions to network operation, with seamless transitions that maintain service availability. The continuous action of monitoring and preparing for role changes ensures that reliability improvements are achieved without significant time losses.
Data Source
AI summary
Disclosed herein are apparatus, system, method, and computer-readable medium aspects for dynamically reassigning a master node in a Local Interconnect Network (LIN). An example method detecting a LIN frame comprising a master node modification request transmitted over a LIN bus. The method authenticates the master node modification request between a current master node and a slave node. The method also switches roles between the current master node and the slave node based on a successful authentication. The authentication operation can involve use of random number challenges and cryptographic keys. Additionally, firmware and hardware configurations can be modified in the method.