Flexible Ethernet PCSL Link Identification via Feature Code Blocks
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Solution Overview
Problem
Existing methods fail to effectively identify and extract a signal of a corresponding sub-Ethernet link from signals of a flexible Ethernet, particularly in optical interconnections where the number of physical coding sublayer lanes exceeds the number of optical lanes, due to the limitations of the auto-negotiation sublayer in processing and identifying these links.
Innovation Solution
Inserting a feature code block into the physical coding sublayer to represent the Ethernet link, which includes a link identity and other information, allowing for the identification and negotiation of the Ethernet link, enabling the correct attribution and allocation of sub-Ethernet links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an auto-negotiation sublayer is added below the PMD sublayer to identify sub-Ethernet links, then the bit rate negotiation of Ethernet link is improved, but the ability to identify which sub-Ethernet link a PCSL belongs to is lost when the quantity of PCSLs exceeds the quantity of Optical Lanes
Solution Approach 1:
The patent introduces a new dimension for link identification by adding a link identification field within the feature code block at the PCS level. This allows identification of sub-Ethernet links beyond the limitations of optical lane counting, enabling accurate identification even when PCSL quantity exceeds optical lane quantity.
Solution Approach 2:
The feature code block serves as an intermediary carrier that transports link identification information from the transmit end to the receive end. By embedding the link identification field within this feature code block, the system enables precise mapping between PCSLs and sub-Ethernet links without relying solely on optical lane enumeration.
2Ease of operation
If the AN sublayer is used to negotiate Ethernet link parameters, then bit rate negotiation is achieved, but it cannot process PCSL-level information since it operates below the PCS layer
Solution Approach 1:
The patent merges the link identification function with the existing feature code block mechanism at the PCS level. By combining link identification information with the feature code block that already operates at the PCS layer, the system avoids adding a separate complex sublayer while still achieving automatic link identification and negotiation capabilities.
3Stability of the object's composition
If optical interconnection is used with fixed transmission rates, then transmission stability is improved, but bit rate negotiation becomes unnecessary and link identification becomes more complex
Solution Approach 1:
The system performs self-identification of sub-Ethernet links by embedding link identification information directly in the feature code blocks transmitted along each PCSL. Each transmit end automatically generates and inserts the appropriate link identification field, and the receive end automatically extracts and processes this information without requiring external negotiation or complex mapping mechanisms.
Data Source
AI summary
Embodiments of the present invention relate to the communications field and disclose a data transmission method, apparatus, device, and system, so as to acquire attribution information of a PCSL, and decrease overheads and complexity of identifying a network link during data transmission. The method includes: inserting a feature code block into a physical coding sublayer PCS to form a physical coding sublayer lane PCSL, where the feature code block is used to represent an Ethernet link to which the PCSL belongs; and sending the PCSL. The present invention is used for PCSL attribution identification.