OTN Service Frame Mapping for Coding Block Boundary Detection
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Solution Overview
Problem
The existing optical transport network (OTN) frames, particularly the optical service unit (OSU) frames, face challenges in improving operation, administration, and maintenance (OAM) performance due to complexities in determining data coding block boundaries.
Innovation Solution
A data mapping method is introduced where the size of the valid payload area of a service frame is designed to match the size of the data coding blocks, with a fixed location for the valid payload area, and optionally incorporating frame header indication overhead fields to enhance boundary determination efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the valid payload area size is designed to match the data coding block size with fixed location, then the efficiency of determining data coding block boundaries is improved, but the device complexity increases due to the need for precise size matching and fixed positioning
Solution Approach 1:
The service frame is segmented into distinct functional areas: overhead area, valid payload area, and padding payload area. This segmentation allows the valid payload area to be precisely positioned and sized to match data coding blocks, enabling efficient boundary determination while maintaining overall frame structure manageability through clear separation of concerns.
Solution Approach 2:
Different areas of the service frame are assigned different properties: the overhead area contains control information, the valid payload area is sized and positioned to exactly match data coding blocks for efficient processing, and the padding payload area handles alignment. This local differentiation optimizes each area's function while resolving the contradiction between boundary determination efficiency and overall complexity.
2Productivity
If frame header indication overhead fields are incorporated, then the boundary determination efficiency is further enhanced, but the overhead area size and processing complexity increase
Solution Approach 1:
Frame header indication overhead fields are placed at the beginning of the overhead area to provide advance information about the frame structure, including the size and position of the valid payload area. This preliminary information allows receiving devices to quickly determine data coding block boundaries without processing the entire frame, thereby enhancing boundary determination efficiency while keeping overhead additions minimal and targeted.
3Device complexity
If the valid payload area size is made equal to the data coding block size, then the processing complexity is reduced, but the adaptability to different data sizes is limited
Solution Approach 1:
The service frame structure incorporates dynamic elements: the valid payload area size is configured to match specific data coding block sizes for optimized processing, while the padding payload area dynamically adjusts to accommodate different total frame sizes and data requirements. This dynamic configuration allows the system to maintain low processing complexity for matched sizes while adapting to various data sizes through the flexible padding mechanism.
Solution Approach 2:
The frame structure allows parameter changes in the valid payload area size to match different data coding block sizes (e.g., 48 bytes, 64 bytes, 128 bytes), while the padding payload area parameter adjusts accordingly to maintain overall frame integrity. This parameter flexibility enables the system to optimize processing complexity for specific data sizes while maintaining adaptability to different data requirements.
Data Source
AI summary
In accordance with an embodiment, a method includes obtaining service data; mapping the service data into a payload area of a service frame, mapping the service frame into a payload area of a data frame, and sending the data frame. The service frame includes an overhead area and the payload area; the overhead area of the service frame includes a plurality of frame header indication overhead fields; each of the plurality of frame header indication overhead fields comprises a first field; and the first field represents a ranking of each frame header indication overhead field in the plurality of frame header indication overhead fields.