Communication Node Cut-Through Routing Error Handling
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Solution Overview
Problem
In Ethernet-based vehicle networks, communication nodes using the IEEE 802.1Qcc standard's cut-through frame routing scheme face issues with routing errors due to errors in destination MAC addresses, leading to incorrect frame transmission and continuous errors in the routing process.
Innovation Solution
The method involves a communication node receiving a frame, obtaining its destination address, and transmitting an error indicator frame to the source node when the destination port does not exist in the routing table, allowing for error correction and preventing further incorrect frame transmissions by performing error checks on subsequent frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the cut-through frame routing scheme is used without separate error check, then the transmission speed is improved, but the reliability of frame routing deteriorates due to undetected destination address errors
Solution Approach 1:
The patent applies preliminary action by performing a destination address validity check (verifying if the destination address exists in the routing table) before frame transmission. This preliminary validation prevents frames with erroneous destination addresses from being transmitted, thereby maintaining routing reliability while preserving the fast cut-through transmission mode.
2Productivity
If continuous frame transmission is maintained without error detection, then the productivity is improved, but the network load increases due to continuous erroneous frame transmissions
Solution Approach 1:
The patent implements feedback by monitoring whether the destination address of a received frame exists in the routing table. When an error is detected (destination address not found), the system stops transmitting frames through the cut-through scheme and switches to a different transmission mode, thereby preventing continuous erroneous transmissions and reducing unnecessary network load.
3Reliability
If the cut-through frame routing scheme is stopped for error checking, then the routing reliability is improved, but the transmission speed deteriorates
Solution Approach 1:
The patent applies partial action by performing only a destination address validity check (checking if the address exists in the routing table) rather than a complete frame error check. This partial validation approach maintains routing reliability by preventing obviously erroneous transmissions while minimizing the impact on transmission speed through selective rather than comprehensive checking.
Data Source
AI summary
An operation method of a first communication node comprises: receiving a first frame from a second communication node; obtaining a destination address of the first frame; and transmitting a second frame including an indicator for indicating an occurrence of an error in the first frame to a communication node corresponding to a source address of the first frame, when a port corresponding to the destination address does not exist in a routing table.