Period-Based Mapping Updates for Abnormal Link Delay Detection
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Solution Overview
Problem
In deterministic networking, downstream nodes fail to detect abnormal delays on links due to link switching or delay changes, leading to unstable data transmission.
Innovation Solution
A method for updating period-based mapping relationships by detecting time differences between sequentially received packets to adapt to abnormal delays, ensuring timely detection and recovery of link switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a downstream node uses a fixed period-based mapping relationship for packet forwarding, then forwarding simplicity is maintained, but transmission stability deteriorates when link delays change
Solution Approach 1:
The patent transforms the static period-based mapping relationship into a dynamic one by introducing time difference detection and adaptive adjustment mechanisms. The downstream node monitors the time differences between sequentially received packets and adjusts the mapping relationship when abnormal delays are detected, enabling the system to adapt to changing link conditions while maintaining forwarding efficiency
Solution Approach 2:
The patent implements a feedback mechanism where the downstream node detects time differences between received packets, compares them against threshold values, and uses this information to dynamically adjust the period-based mapping relationship. This closed-loop control ensures transmission stability by continuously adapting to link delay variations
2Reliability
If the downstream node detects abnormal delays by monitoring time differences, then transmission stability is improved, but device complexity increases
Solution Approach 1:
The downstream node performs self-diagnosis by autonomously monitoring time differences between sequentially received packets and automatically adjusting its own period-based mapping relationship without requiring external intervention or complex centralized control mechanisms
Solution Approach 2:
The patent monitors changes in time difference parameters between received packets and uses these parameter variations to trigger adjustments in the period-based mapping relationship, enabling simple threshold-based detection that balances reliability improvement with minimal complexity increase
Data Source
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AI summary
This application provides a mapping relationship updating method, applied to deterministic networking, so as to update a period-based mapping relationship in a timely manner after occurrence of an abnormal delay of a link is determined, thereby ensuring stable packet forwarding. The method includes: A first device sequentially obtains a first packet and a second packet that are sent by a second device; the first device determines a first time difference between a time at which the first packet is received and a time at which the second packet is received; and if the first device determines that the first time difference is not within a preset range, the first device updates a period-based mapping relationship, where the period-based mapping relationship includes a mapping relationship between a first period label and a sending period, the first period label is an identifier carried in a packet sent by the second device to the first device, and the sending period is a period in which for the first device to forwards the packet corresponding to the first period label to a third device.