GFP Frame Adaptation for Efficient Traffic Extraction
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Solution Overview
Problem
Existing methods for transporting client traffic over carrier Ethernet networks require extracting all traffic units from a GFP frame to extract a single encapsulated unit, which is inefficient and limits versatility.
Innovation Solution
A method that maps client frames to the payload area of carrier frames using a generic framing procedure, with extension fields indicating fragmentation status and sequence numbers, allowing for the extraction of individual client frames without requiring all other frames to be extracted, and enables hierarchical GFP mapping to facilitate efficient multiplexing and segmentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all traffic units are extracted from a GFP frame to extract a single encapsulated unit, then the extraction process can be completed, but the processing efficiency deteriorates and network versatility is limited
Solution Approach 1:
The patent divides the GFP frame into multiple independent traffic units, each with its own header containing extraction identification information. This segmentation allows the receiving end to identify and extract specific traffic units without processing the entire frame, thereby improving processing efficiency while maintaining extraction capability.
Solution Approach 2:
The patent extracts only the necessary traffic unit from the GFP frame by using extraction identification information in the headers to locate and pull out the specific unit needed. This avoids the inefficiency of extracting all traffic units when only one is required, thus improving productivity without compromising ease of operation.
2Productivity
If multiple client signals are multiplexed within a single carrier frame, then transmission efficiency improves, but frame structure complexity increases
Solution Approach 1:
The patent implements a hierarchical frame structure where multiple client frames are nested within a single carrier GFP frame. Each nested frame maintains its own header with extraction identification information, allowing efficient multiplexing of multiple client signals while the hierarchical organization prevents excessive complexity by providing clear structural boundaries and identification mechanisms.
Data Source
AI summary
A method of generating a generic framing procedure hierarchy comprising processing a first generic framing procedure frame to determine the overall length of the generic framing procedure frame, mapping the frame into the generic framing procedure payload area of a second generic framing procedure frame at the next level of the generic framing procedure hierarchy, whereby information enabling the size of the generic framing procedure payload remaining after that frame has been extracted is captured in the header fields of the generic framing procedure frame into which the first frame is encapsulated, and wherein the generic framing procedure header indicates whether there are more frames left in the mapping hierarchy when de-encapsulating (i.e., running down) the generic framing procedure frame stack by providing an indicator at level N of the hierarchy that at the level N−1 there is a generic framing procedure frame to extract.