FlexE PHY Clock Offset Alignment for Link Capacity Adjustment
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Solution Overview
Problem
During link capacity adjustments in FlexE groups, clock offsets of PHYs can cause data loss due to misalignment, which existing technologies fail to adequately address.
Innovation Solution
A method and device that obtain the latency of PHYs within a FlexE group and align the clock offsets of all PHYs to prevent data loss during link capacity adjustments, ensuring proper synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If link capacity adjustment is performed in FlexE group, then service isolation and network sharding are achieved, but data loss occurs due to clock offsets of PHYs
Solution Approach 1:
The patent measures the latency of each PHY before link capacity adjustment, and pre-calculates the clock offset values that need to be compensated. This preliminary measurement and calculation ensures that when the actual adjustment occurs, the clock offsets are already known and can be properly compensated, preventing data loss.
Solution Approach 2:
The patent dynamically adjusts the clock offset parameters of PHYs based on the measured latency values. By changing the clock offset parameter according to the specific latency characteristics of each PHY, the system maintains synchronized data transmission even when link capacity is adjusted, thus preventing data loss while enabling flexible capacity changes.
2Ease of operation
If calendar configuration is performed during link capacity adjustment, then service flow routing is configured, but data loss occurs due to wrong service flow and switching order
Solution Approach 1:
The patent performs latency measurement and clock offset calculation before executing the calendar configuration. This preliminary preparation ensures that when service flows are routed and switching is performed, the clock synchronization is already optimized, preventing data loss due to wrong service flow routing or incorrect switching order.
Solution Approach 2:
The patent uses the measured latency values as feedback to adjust the clock offsets of PHYs before calendar configuration takes effect. This feedback mechanism ensures that the system adapts to the actual transmission characteristics, preventing data loss during the configuration transition.
3Reliability
If multiple PHYs are synchronized during link capacity adjustment, then data loss is prevented, but additional processing time and complexity are required
Solution Approach 1:
The patent enables each PHY to self-measure its own latency and self-calculate its required clock offset compensation. This self-service approach eliminates the need for complex centralized control and coordination, reducing system complexity while still achieving reliable synchronization of all PHYs during link capacity adjustment.
Solution Approach 2:
The patent focuses on adjusting only the critical clock offset parameter of each PHY based on its measured latency, rather than reconfiguring the entire system. This targeted parameter adjustment simplifies the synchronization process while ensuring data transmission reliability.
Data Source
AI summary
Provided are a link capacity adjustment method and device. The method includes: a node device obtains a latency of a Physical Layer (PHY) for link capacity adjustment of a Flex Ethernet (FlexE) group; and clock offsets of all the PHYs in the FlexE group are aligned according to the obtained latency. According to embodiments of the present disclosure, the clock offsets of all the PHYs in the FlexE group are aligned, thereby preventing data loss caused by the clock offsets of the PHYs in the FlexE group during link capacity adjustment.