Universal Frame Structure for Multi-Traffic Transport
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Solution Overview
Problem
Existing network elements face complexity in handling and transporting different types of traffic data, such as SDH, SONET, and OTN, due to the need for various information structures, which affects transmission reliability.
Innovation Solution
A flexible frame structure is designed to support digital interconnections between transmitting and receiving elements, featuring an overhead section, data-stuffing section, and data section, allowing for the mapping and transport of multiple traffic types, including SDH, SONET, and OTN, with adaptive stuffing to ensure consistent frame size and inclusion of overhead information for quality monitoring and protection switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different information structures are used for different traffic types (SDH, SONET, OTN), then each traffic type can be transported with optimized structure, but the equipment complexity increases significantly
Solution Approach 1:
The patent implements a universal frame structure that can accommodate multiple traffic types (SDH, SONET, OTN, CBR) through a single standardized format. The frame includes configurable sections (overhead section, data section, stuffing section) that can be adapted to different traffic requirements, eliminating the need for separate dedicated structures for each protocol type while maintaining transmission reliability.
Solution Approach 2:
The frame structure employs variable parameters including different frame sizes (adjustable data section and stuffing section), configurable overhead section lengths, and adaptable mapping schemes. These parameter changes allow the same basic structure to be optimized for different traffic types without requiring fundamentally different information structures, thus reducing equipment complexity while preserving reliability.
2Reliability
If dedicated information structures are implemented for each traffic type, then transmission reliability is improved, but the handling complexity of multiple traffic types in the same equipment increases
Solution Approach 1:
The universal frame structure provides a unified handling mechanism for multiple traffic types. The standardized format with configurable sections allows the same processing logic and switching mechanisms to handle SDH, SONET, OTN, and CBR traffic, significantly reducing the operational complexity compared to maintaining separate dedicated handling paths for each protocol.
Solution Approach 2:
The frame is segmented into functional sections (overhead section for control information, data section for payload, stuffing section for alignment and padding) that can be independently configured for different traffic types. This segmentation allows flexible adaptation to various protocols while maintaining a consistent overall structure, simplifying the handling process.
3Device complexity
If fixed frame size is used for all traffic types, then frame processing becomes simpler, but the data section may not accommodate all traffic types efficiently
Solution Approach 1:
The frame structure implements dynamic sizing capabilities where the data section and stuffing section lengths can be adjusted based on the specific traffic type being transported. This dynamic adaptation allows efficient accommodation of different traffic requirements (e.g., different payload sizes for SDH vs. OTN) while maintaining a consistent frame processing framework, balancing simplicity and versatility.
Solution Approach 2:
The patent employs variable frame parameters including adjustable data section size, configurable overhead section length, and adaptable stuffing section size. These parameter changes enable the frame structure to efficiently accommodate different traffic types without requiring fundamentally different processing mechanisms, thus maintaining relative simplicity while achieving high adaptability.
4Adaptability or versatility
If larger frame size is allocated to accommodate all traffic types, then all traffic can be mapped without fragmentation, but the transmission efficiency decreases for smaller traffic types
Solution Approach 1:
The dynamic section sizing allows the frame to be optimized for each traffic type. When smaller traffic types are transported, the data section and stuffing section can be reduced to the minimum necessary size, eliminating wasted space and improving transmission efficiency. The frame expands only when larger traffic types require more capacity, ensuring efficient resource utilization across all scenarios.
Solution Approach 2:
By allowing variable frame parameters (data section size, stuffing section size, overhead section configuration), the system can adjust the frame size to match the actual traffic requirements. This prevents the transmission efficiency degradation that would occur with fixed large frames by dynamically optimizing the frame size for each traffic type, thus maintaining high productivity while preserving adaptability.
Data Source
AI summary
The present invention consists of an information structure conceived for the transport of data in digital form from a transmitting element to a receiver. This structure calls for fields for transport of the data and heading information fields termed “overhead” which improve transmission reliability. This structure enables support of digital interconnections in an element of a transport network capable of switching various traffic types such as CBRx (for example STM-N e OC-N), VC-N, STS-N or ODUk. The structure also enables identification of the frame beginning, verification of the integrity and correctness of the switching, support of protection switching, and transport of quality and timing information associated with the switched entities.