Optical Signal Transmission Flexible Tributary Mapping
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Solution Overview
Problem
Conventional optical transport network (OTN) technologies face challenges with low bandwidth utilization and limited flexibility in adjusting the transmission rate of client service signals, leading to inefficiencies and increased costs.
Innovation Solution
The proposed solution involves mapping optical data units to flexible tributary unit frames with payload blocks, which are then distributed within optical payload unit frames, allowing for greater bit rate flexibility and improved bandwidth utilization by using payload blocks as the mapping granularity instead of fixed tributary slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed tributary slots are used as mapping granularity, then device complexity is reduced and ease of operation is improved, but bandwidth utilization deteriorates and flexibility in adjusting transmission rate deteriorates
Solution Approach 1:
The patent divides the tributary slot into multiple payload blocks, where each payload block can be independently mapped to OPU frames. This segmentation allows fine-grained control of bandwidth allocation while maintaining manageable device complexity through standardized mapping procedures.
Solution Approach 2:
The patent introduces dynamic mapping where the number of payload blocks per OPU frame can be flexibly adjusted based on service requirements. The mapping relationship between ODU and OPU is no longer fixed but can be dynamically configured, enabling adaptive transmission rate adjustment without increasing overall system complexity.
2Productivity
If fixed tributary slots are used as mapping granularity, then device complexity is reduced, but bandwidth utilization deteriorates
Solution Approach 1:
By segmenting tributary slots into multiple payload blocks, the system can allocate bandwidth in smaller, more efficient units. This reduces wasted bandwidth while the standardized segmentation approach keeps device complexity manageable through reusable mapping templates.
Solution Approach 2:
The patent changes the mapping parameter from fixed tributary slot granularity to flexible payload block granularity. This parameter change enables continuous adjustment of bandwidth allocation to match actual service demands, improving utilization while the modular nature of payload blocks keeps implementation complexity reasonable.
3Adaptability or versatility
If payload blocks are distributed in OPU frame payload area, then flexibility in adjusting transmission rate is improved, but device complexity increases
Solution Approach 1:
The distribution of payload blocks across OPU frame payload areas creates a segmented mapping structure that enables flexible rate adjustment. Each payload block can be independently controlled, and the modular segmentation keeps implementation complexity manageable through standardized block handling procedures.
Solution Approach 2:
The payload block structure serves multiple functions: it acts as both the mapping unit for flexibility and the basic transmission unit for standardization. This universal structure eliminates the need for separate mechanisms for flexibility and standardization, reducing overall implementation complexity despite the enhanced adaptability.
Data Source
AI summary
An optical signal transmission method includes mapping a first optical data unit frame to a first flexible tributary unit frame, where the first flexible tributary unit frame includes a plurality of payload blocks; mapping the first flexible tributary unit frame to a first optical payload unit frame, where the plurality of payload blocks are distributed in a payload area of the first optical payload unit frame; mapping the first optical payload unit frame to a second optical data unit frame, where a bit rate of the second optical data unit frame is greater than a bit rate of the first optical data unit frame; mapping the second optical data unit frame to a first optical transport unit frame; and sending the first optical transport unit frame.