Fixed Generic Mapping Procedure for Optical Transport Frame Synchronization
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Solution Overview
Problem
In optical transport networks, existing technologies face challenges in accurately mapping client data into optical transport frames, particularly in maintaining synchronization between client data rates and optical payload unit rates, leading to inefficiencies and the need for backpressure signals to manage data flow.
Innovation Solution
A fixed Generic Mapping Procedure (GMP) unit is employed to map client data into optical transport frames, generating precise timing information based on bit and fractional bit granularity, ensuring accurate data recovery and maintaining synchronization by predetermining the number of bits or fractional bits mapped into each frame, and using backpressure signals to manage data flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If client data is mapped into optical transport frames using conventional methods, then data transmission is enabled, but synchronization between client data rates and optical payload unit rates deteriorates, requiring backpressure signals to manage data flow
Solution Approach 1:
The patent applies preliminary action by pre-configuring the mapping relationship between client data and optical transport frames before data transmission begins. The system establishes the mapping parameters and timing information in advance, eliminating the need for continuous backpressure signals during operation and simplifying data flow management while maintaining synchronization accuracy.
2Adaptability or versatility
If flexible frame encapsulation is used to accommodate different data rates, then adaptability improves, but timing precision and data recovery accuracy deteriorate
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting mapping parameters based on the specific data rate and frame configuration requirements. The system modifies timing information, mapping ratios, and frame structure parameters to match the actual data characteristics, thereby maintaining timing precision while preserving frame size flexibility for different data rates.
3Productivity
If multiple existing frames are wrapped into a single optical transport frame, then overhead reduction and efficiency improvement are achieved, but mapping precision and data recovery complexity increase
Solution Approach 1:
The patent applies segmentation by dividing the optical transport frame into distinct segments that correspond to individual client data frames. Each segment is independently mapped and can be recovered separately, which simplifies the data recovery process while maintaining the efficiency benefits of wrapping multiple frames into a single optical transport frame. The segmentation approach reduces mapping precision requirements compared to treating the entire wrapped frame as a single unit.
Data Source
AI summary
A fixed Generic Mapping Procedure (GMP) apparatus and method are provided to map client data to an optical transport frame. Client data to be mapped into a payload field of an optical transport frame is received and store in a memory. Timing information is generated based on bit and fractional bit granularity of client data mapped into the payload field of successive optical transport frames for use in recovering the client data from received optical transport frames.