Arbitrary Control Symbol Placement in Ethernet PCS Encoding
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Solution Overview
Problem
The 10GBASE-R standard in IEEE 802.3 restricts control code placement within data blocks, posing challenges for aggregated communications channels, particularly in high-speed Ethernet networks where control codes need to appear in any byte position, leading to increased overhead and limitations in device pin counts.
Innovation Solution
A system and method for encoding and decoding packets that allow control symbols to be placed arbitrarily within data blocks, using a Physical Coding Sublayer (PCS) with a sync header field and block type field to identify and locate control symbols, enabling efficient data transmission and reception across multiple independent data streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If control codes are restricted to specific byte positions in data blocks according to 10GBASE-R standard, then encoding overhead is reduced, but adaptability for aggregated communication channels deteriorates
Solution Approach 1:
The patent introduces dynamic control symbol placement within data blocks, allowing control symbols to be positioned at arbitrary locations rather than fixed positions. This dynamic approach enables the encoding scheme to adapt to aggregated communication channels while maintaining efficient overhead through the use of block type fields and sync headers that dynamically indicate control symbol locations.
2Adaptability or versatility
If control symbols are placed at arbitrary locations in data blocks, then adaptability for aggregated channels is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by placing sync headers at the beginning of data blocks that预先 indicate the presence and locations of control symbols within the block. This preliminary information allows receivers to efficiently locate and process control symbols without increasing overall system complexity, as the positioning information is prepared in advance rather than requiring complex real-time searching.
Solution Approach 2:
The block type field serves as an intermediary element that mediates between the arbitrary control symbol placement and the receiver's ability to process the data. This intermediary structure provides a standardized interface that simplifies the encoder/decoder design while enabling flexible control symbol positioning within the data blocks.
3Device complexity
If fixed control code placement is used, then encoder simplicity is maintained, but support for multiple independent data streams deteriorates
Solution Approach 1:
The patent segments the data block structure into distinct components: sync headers, block type fields, control symbols, and data payloads. This segmentation allows each component to have a specific function, enabling the encoder to handle multiple independent data streams efficiently while maintaining relative simplicity through modular processing of each segment type.
Data Source
AI summary
Systems and methods are provided for encoding and decoding. An encoder receives packets including control symbols from a plurality of independent data sources. The encoder produces a combination packet having a plurality of control symbols at arbitrary locations within the combination packet. The combination packet includes a sync header field to identify the combination packet as containing the plurality of control symbols, a block type field to locate the plurality of control symbols, and the plurality of control symbols. A corresponding decoder performs decoding.