fgODU Frame Mapping for Fine-Grained SDH Signal Transmission
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Solution Overview
Problem
Existing OTN technologies face challenges in efficiently transmitting SDH service data, particularly with bandwidths less than 1 Gigabit, due to the lack of effective processing of fine-grained signals such as AU-4, TUG-3, and TU-12 frames, leading to bandwidth waste and increased device complexity.
Innovation Solution
A method for signal transmission that maps AU/TUG/TU frames corresponding to STM-N/E1 signals to the payload area of fgODU frames, utilizing an extended overhead area to indicate the starting position of these frames, allowing efficient transmission and simplifying the data processing by limiting extraction to a shallow layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SDH service data is transmitted using existing OTN technologies, then transmission can be achieved, but bandwidth is wasted and device complexity increases due to lack of fine-grained signal processing
Solution Approach 1:
The patent segments SDH service data into fine-grained signals (AU-4, TUG-3, TU-12 frames) and maps each type to a corresponding fgODU frame type. This segmentation allows precise matching of service granularity to transmission resources, improving bandwidth utilization while maintaining manageable device complexity through structured classification.
Solution Approach 2:
The patent changes the mapping parameters by establishing specific correspondence relationships between different SDH service types and fgODU frame types. By defining that AU-4 frames map to fgODU1, TUG-3 frames map to fgODU2, and TU-12 frames map to fgODU3, the system optimizes transmission efficiency without significantly increasing device complexity through standardized parameter mapping.
2Productivity
If fine-grained signals are processed in detail, then transmission efficiency improves, but device complexity increases
Solution Approach 1:
The patent segments the processing task by creating distinct mapping paths for different SDH service types (AU-4, TUG-3, TU-12). Each segment has a predefined correspondence with specific fgODU frame types, allowing efficient processing through specialized handling of each segment rather than uniform complex processing of all services.
Solution Approach 2:
The patent changes processing parameters by establishing fixed mapping relationships between service types and frame types. This parameter standardization simplifies the processing complexity while maintaining high transmission efficiency, as devices only need to implement predefined mapping rules rather than complex adaptive processing.
3Device complexity
If mapping is performed without fine-grained processing, then device complexity is reduced, but bandwidth utilization deteriorates
Solution Approach 1:
The patent segments SDH services into fine-grained categories (AU-4, TUG-3, TU-12) and assigns each to appropriate fgODU frame types. This segmentation enables precise bandwidth allocation matching service requirements, reducing bandwidth waste while keeping processing complexity manageable through structured classification.
Solution Approach 2:
The patent changes the mapping parameters to establish optimal correspondence between service granularities and transmission frame types. By defining specific mapping relationships (AU-4 to fgODU1, TUG-3 to fgODU2, TU-12 to fgODU3), the system achieves efficient bandwidth utilization without requiring complex adaptive processing.
Data Source
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AI summary
Disclosed in the present application are a signal transmission method and apparatus, and a first device, a second device and a storage medium. The method comprises: obtaining a first frame corresponding to a first signal, wherein the first signal comprises a synchronous transport module (STM)-N signal or an E1 signal, and the first frame comprises an administration unit (AU) frame or a tributary unit group (TUG) frame or a tributary unit (TU) frame; mapping the first frame to a payload area of a second frame, wherein the second frame comprises a fine-grain optical data unit (fgODU) frame; and sending the second frame.