OTN Packet Service Mapping with 257b Blocks for Bandwidth Use
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Solution Overview
Problem
The existing mapping methods for packet services in optical transport networks (OTN) result in bandwidth waste due to inefficient utilization of resources.
Innovation Solution
A service processing method that maps service data to the payload area and control information to the overhead area of OTN transmission frames, utilizing 64b/66b and 256b/257b encoding to optimize bandwidth utilization and enhance error protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If GFP-F or IMP mapping methods are used to map packet services to OTN transmission frames, then the mapping can be implemented, but bandwidth waste occurs due to inefficient resource utilization
Solution Approach 1:
The patent segments the OTN transmission frame into distinct overhead area and payload area, and further segments service data into control information and service data information. Control information is mapped to the overhead area while service data information is mapped to the payload area, enabling precise resource allocation and eliminating bandwidth waste associated with traditional mapping methods.
2Device complexity
If control information is mapped to the payload area along with service data, then simpler mapping is achieved, but error detection capability is reduced
Solution Approach 1:
The patent extracts control information from the service data stream and separates it from service data information. The control information is then mapped to the overhead area of the OTN transmission frame, while service data information is mapped to the payload area. This extraction and separate mapping enhances error detection capability for control information while maintaining manageable mapping complexity through systematic processing.
Data Source
AI summary
A service processing method and apparatus and a device is disclosed. Synchronization headers of four 66b code blocks are removed, and a 1-bit code block type indication is added as control information of service data, to be encoded as a 257b code block. This avoids a bandwidth waste caused by the synchronization headers, and improves bandwidth utilization. When a 257b code block stream is mapped to an OSUflex frame, the code block type indication is mapped to an overhead area of the OSUflex frame, the four 66b code blocks from which the synchronization headers are removed are mapped to a payload area of the OSUflex frame, and check information obtained by checking the control information is mapped to the overhead area of the OSUflex frame, so that bit error protection is performed on the control information.