Ethernet PCS Rate Adaptation for Correct Packet Parsing
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Solution Overview
Problem
Conventional rate adaptation methods in metro transport networks (MTN) at the physical coding sublayer (PCS) of Ethernet networks incorrectly parse packets due to the insertion of idle code blocks, leading to low reliability in data transmission.
Innovation Solution
A method for rate adaptation that inserts or deletes rate adaptation code blocks only between specific code blocks that meet a preset condition, ensuring they are not inserted in locations that could cause parsing errors, thereby maintaining packet integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If idle code blocks are added or deleted at IPG location to perform rate adaptation, then rate adaptation is achieved, but packet parsing correctness is affected
Solution Approach 1:
The patent applies preliminary action by checking the code block relationship between the first and second code blocks before inserting rate adaptation code blocks. The method determines whether the code block relationship meets a preset condition (indicating they belong to different packets) before performing insertion, thereby preventing parsing errors in advance while achieving rate adaptation
Solution Approach 2:
The patent uses the code block relationship check as an intermediary mechanism to mediate between rate adaptation requirements and packet parsing correctness. By introducing this verification step, the system can safely insert rate adaptation code blocks only when it confirms they won't interfere with packet boundaries, thus resolving the contradiction between adaptability and reliability
2Adaptability or versatility
If rate adaptation code blocks are inserted between any adjacent code blocks, then rate adaptation flexibility is improved, but packet integrity is compromised
Solution Approach 1:
The patent applies local quality by making the rate adaptation insertion location-dependent on the local code block relationship. Instead of uniformly inserting code blocks anywhere, the method checks whether adjacent code blocks belong to different packets (local condition) before insertion, thereby maintaining packet integrity in critical locations while allowing flexibility in appropriate locations
Data Source
AI summary
The technology of this application relates to a rate adaptation method and apparatus. The method includes, when a rate adaptation requirement exists, inserting a rate adaptation code block only between two adjacent code blocks whose code block relationship meets a preset condition, or deleting only a rate adaptation code block between two code blocks whose code block relationship meets a preset condition. In this way, it can be ensured that correctness of parsing a packet by a receive side after the receive side receives the packet is not affected by rate adaptation, and reliability of rate adaptation can be improved.