OTN Data Frame Overhead for Rate Compensation Block Identification
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Solution Overview
Problem
Existing optical transport networks face challenges in providing effective rate compensation, reducing buffering and processing delay, and improving transmission performance, particularly in handling service bearer requirements with varying bandwidths.
Innovation Solution
A data transmission method that utilizes indication information in the overhead area of data frames to identify rate compensation blocks within the payload area, allowing for precise insertion and identification of these blocks, thereby simplifying rate compensation processes and reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rate compensation blocks are inserted into data frames to compensate for rate loss, then transmission performance is improved, but device complexity and processing overhead increase
Solution Approach 1:
The system uses self-service by allowing the data frames to carry their own indication information about rate compensation blocks. The receiving end can autonomously identify and process rate compensation blocks based on the indication information embedded in the overhead area, without requiring external control signals or complex coordination mechanisms.
Solution Approach 2:
The data frame is segmented into distinct functional areas: overhead area containing indication information and payload area containing actual data. The rate compensation blocks are specifically positioned in the payload area and can be independently identified through the indication information in the overhead area, allowing for modular processing.
2Productivity
If alignment markers are deleted to increase transmission efficiency, then productivity improves, but rate loss occurs
Solution Approach 1:
The patent converts the potential harm of rate loss into a benefit by deliberately inserting rate compensation blocks at specific positions in the data frame. These blocks compensate for the rate loss that would otherwise occur due to deletion or compression of alignment markers, transforming a negative effect into a controlled and manageable parameter.
Solution Approach 2:
The system changes the parameter of data frame structure by introducing indication information in the overhead area that specifies the positions of rate compensation blocks in the payload area. This parameter change allows the receiving end to accurately identify and handle rate compensation blocks, maintaining data integrity while improving transmission efficiency.
3Reliability
If buffering is increased to handle rate variations, then reliability improves, but loss of time increases
Solution Approach 1:
The patent applies preliminary action by pre-positioning rate compensation blocks at specific, predetermined locations within the data frame structure. The indication information in the overhead area预先 marks these positions, allowing the receiving end to prepare for and efficiently process these blocks without requiring extensive buffering or delayed processing.
Data Source
AI summary
Embodiments of this application provide a data transmission method and an apparatus, and are applied to an optical transport network. The method includes: A sending device obtains service data, maps the service data to a data frame, and sends the data frame to a receiving device. The data frame includes an overhead area and a payload area, the payload area includes a plurality of blocks, the overhead area includes indication information, and the indication information indicates whether a block in the plurality of blocks in the payload area is a rate compensation block.