Sideband Data Insertion in Ethernet Alignment Markers
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Solution Overview
Problem
In wired local and wide area Ethernet networks, existing sideband communication systems require a separate connection for management and control data, which limits bandwidth efficiency and increases complexity.
Innovation Solution
The method involves inserting sideband data into alignment markers within the data transmission stream, allowing the use of the same wired connection for both data and control information, eliminating the need for a separate sideband connection by encoding control information within the alignment markers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate sideband connection is used for control and management data, then communication reliability is improved, but device complexity and bandwidth efficiency deteriorate
Solution Approach 1:
The patent merges the control data transmission function into the existing data transmission connection by embedding control information within alignment markers in the data stream. This eliminates the need for a separate physical sideband connection, reducing network architecture complexity while maintaining communication reliability through the integrated transmission path.
Solution Approach 2:
The wired connection is made universal by enabling it to carry both data traffic and control/management information simultaneously. The alignment markers in the data stream serve dual purposes: maintaining data synchronization and conveying control information, thus allowing a single connection to fulfill multiple communication functions.
2Reliability
If a separate sideband connection is used for control data, then communication reliability is improved, but bandwidth efficiency deteriorates
Solution Approach 1:
The patent combines control data transmission with the existing data transmission channel by embedding control information in alignment markers. This eliminates the need for dedicated bandwidth allocation for sideband connections, thereby improving overall bandwidth efficiency while maintaining reliable control communication through the shared channel.
3Productivity
If alignment markers are modified to carry sideband data, then bandwidth efficiency is improved, but measurement precision deteriorates
Solution Approach 1:
The alignment marker structure is segmented into distinct functional fields: synchronization fields for alignment detection and control data fields for carrying management information. This segmentation allows receiving devices to efficiently extract control data while maintaining robust alignment detection capabilities, thus balancing bandwidth efficiency with measurement precision.
Solution Approach 2:
Different portions of the alignment marker are assigned different functions with appropriate characteristics. The synchronization fields maintain high precision for alignment detection, while the control data fields are optimized for information transmission. This local differentiation of quality ensures that alignment precision is not compromised while enabling efficient control data carrying.
Data Source
AI summary
A first network device including a physical layer device. The physical layer device is configured to receive data for transmission to a second network device and receive sideband data for transmission to the second network device. The sideband data corresponds to control information, management information, and/or status information. The physical layer device is further configured to provide, via a first wired connection, the data for transmission to the second network device, generate alignment markers, insert the sideband data into the alignment markers, and selectively provide, via the same first wired connection, the alignment markers including the sideband data inserted by the physical layer device.