Optical Burst Transport Unit Multiplexing in OTN
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Solution Overview
Problem
The existing optical transport networks (OTNs) face complexity and significant data processing delays due to the need for frequent optical-electrical-optical conversion and extensive electrical signal processing, especially when handling multiplexing and cross-connection of optical channel data units (ODUs) at sub-wavelength granularity.
Innovation Solution
The proposed solution involves mapping ODU to an optical burst transport unit, which is then carried onto an optical timeslot of an optical burst channel, enabling all-optical switching and reducing the need for optical-electrical conversion, thereby simplifying the data processing and reducing delays by performing multiplexing and cross-connection at the optical layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical-electrical-optical conversion and electrical signal processing are performed for ODU multiplexing and cross-connection, then reliable data transmission is achieved, but data processing delay increases and processing complexity increases
Solution Approach 1:
The patent replaces the traditional optical-electrical-optical conversion mechanism with an all-optical switching mechanism. Optical signals are directly switched and multiplexed at the optical layer without conversion to electrical domain, eliminating the time-consuming conversion processes while maintaining transmission reliability through optical domain processing
2Adaptability or versatility
If optical-electrical-optical conversion is performed for ODU multiplexing and cross-connection, then network functionality is achieved, but device complexity increases
Solution Approach 1:
The patent extracts the conversion processes from the optical transport network path, separating the optical layer processing from the electrical layer processing. By taking out the optical-electrical-optical conversion steps, the patent simplifies the main data path while maintaining network functionality through dedicated conversion points only where necessary
3Adaptability or versatility
If extensive electrical signal processing is performed, then ODU multiplexing and cross-connection are achieved, but processing time increases
Solution Approach 1:
The patent substitutes electrical signal processing with optical signal processing for ODU multiplexing and cross-connection operations. Optical switches and optical multiplexers directly manipulate optical signals in the optical domain, achieving the same functionality without the time delays inherent in electrical conversion and processing
Data Source
AI summary
Embodiments of the present invention provide a data processing method, related device, and system for an optical transport network. The data processing method for the optical transport network includes: encapsulating service data into an optical payload unit; mapping the optical payload unit to an optical channel data unit; mapping the optical channel data unit to a payload area of an optical burst transport unit; performing electrical-optical conversion on the optical burst transport unit to form an optical burst transport unit; carrying the optical burst transport unit onto an optical timeslot of an optical burst channel; and transmitting the optical burst channel to a line. Technical solutions provided by the present invention can effectively simplify a data processing process and reduce a data processing delay.