Ring Network Switch ID Duplication Detection
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Solution Overview
Problem
In in-vehicle communication networks, existing ring topologies face issues with ID duplication and incorrect identification of abnormal sections, leading to inefficiencies in frame transfer and network reliability.
Innovation Solution
A relay device with a storage unit that maintains connection information, including identification information of other relay devices and their connection order, is implemented to correct connection information and detect abnormal sections within the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ring topology is used without ID duplication detection, then device complexity is reduced, but network reliability deteriorates due to incorrect frame transfer
Solution Approach 1:
The relay device performs preliminary detection of ID duplication by comparing received identification information with stored connection information before frame transfer. This preliminary action prevents incorrect frame transfer by identifying and correcting ID duplications in advance, thereby improving network reliability without requiring complex continuous monitoring mechanisms.
Solution Approach 2:
The relay device implements feedback by using received identification information to update stored connection information and generate corrected frame transfer paths. This feedback mechanism ensures that frame transfer accuracy is continuously improved based on detected ID duplications, enhancing network reliability while maintaining manageable device complexity through iterative correction rather than complex prevention.
2Productivity
If ID duplication is not corrected, then device complexity is minimized, but frame transfer efficiency deteriorates due to incorrect routing
Solution Approach 1:
The relay device performs preliminary correction of ID duplication by comparing received identification information with stored connection information before frame transfer. This preliminary correction action ensures accurate frame routing by identifying and eliminating ID duplications in advance, thereby improving frame transfer efficiency without requiring complex continuous correction mechanisms.
Solution Approach 2:
The relay device implements feedback by using received identification information to update stored connection information and generate corrected frame transfer paths. This feedback mechanism ensures frame transfer accuracy is continuously improved based on detected ID duplications, enhancing productivity while maintaining manageable device complexity through iterative correction rather than complex prevention.
3Measurement precision
If connection information is not maintained, then device complexity is reduced, but measurement precision of network state deteriorates
Solution Approach 1:
The relay device performs preliminary maintenance of connection information by storing received identification information and comparing it with existing records before frame transfer. This preliminary action ensures accurate identification of network nodes by detecting ID duplications in advance, thereby improving identification precision without requiring complex continuous verification mechanisms.
Solution Approach 2:
The relay device implements feedback by using received identification information to update stored connection information and generate corrected frame transfer paths. This feedback mechanism ensures identification accuracy is continuously improved based on detected ID duplications, enhancing measurement precision while maintaining manageable device complexity through iterative correction rather than complex prevention.
Data Source
AI summary
A relay device, or a switch, in a ring network corrects connection information including (i) identification information of respective switches in the network and (ii) a connection order of other switches seen from a subject switch, by storing in a memory a switch ID table of the subject switch, which includes an ID of each of the other switches and a connection order of the other switches seen from the subject switch, for identifying an abnormal section of the network, for example. Each of the switches has a function that (i) generates anew ID for the restarted switch for generating a new ID table and (ii) causes the other switches to generate a respective new switch ID table, when detecting switch ID duplication among the switches or when restarting from a reset.