OTN Service Container Mapping for Small-Bandwidth Transport
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Solution Overview
Problem
Existing optical transport networks (OTN) suffer from significant bandwidth waste when carrying services with bandwidths lower than 1.25 Gbps, such as Fast Ethernet, STM-1, and E1 services, due to the minimum time slot granularity of 1.25 Gbps in the OTN standard G.709.
Innovation Solution
The method involves mapping client services into service containers, which are then carried in data frames composed of unit blocks with fixed lengths, allowing for flexible division of the payload area to accommodate services of varying bandwidths, including first-type, second-type, and third-type service containers, and using configuration information to ensure accurate demapping and efficient utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the minimum time slot granularity of 1.25 Gbps is used in OTN, then the network can transmit high-bandwidth services efficiently, but bandwidth waste occurs when carrying low-bandwidth services
Solution Approach 1:
The patent segments the payload area into multiple time slots with different granularities. Instead of using a single 1.25 Gbps time slot for all services, the system divides the payload into finer granularity time slots (e.g., 1/4, 1/8, 1/16, 1/32, 1/64 of 1.25 Gbps) to match the actual bandwidth requirements of different services, thereby reducing bandwidth waste while maintaining transmission efficiency
Solution Approach 2:
The patent introduces dynamic time slot allocation where the granularity and number of time slots can be flexibly adjusted based on the bandwidth requirements of carried services. The system can dynamically configure time slot structures to adapt to different service types and bandwidth demands, transforming the static 1.25 Gbps granularity into a dynamic, multi-granularity system
2Stability of the object's composition
If fixed-length time slots are used in OTN payload, then the structure is simple and stable, but flexibility to accommodate varying service bandwidths is limited
Solution Approach 1:
The patent segments the fixed payload structure into multiple configurable time slots with different granularities. By dividing the payload area into smaller, standardized time slot units, the system maintains structural regularity while enabling flexible combination of these units to accommodate various service bandwidths, thus resolving the contradiction between structural stability and adaptability
Solution Approach 2:
The patent creates a universal time slot structure that can serve multiple functions. The same time slot framework supports both high-bandwidth and low-bandwidth services by adjusting the number and granularity of time slots allocated, making the system versatile without requiring fundamentally different structures for different service types
Data Source
AI summary
Embodiments of the present disclosure provides a method for service processing in optical transport network including: mapping a client service into a service container; and mapping the service container into a data frame, wherein the data frame includes payload units, each of the payload units consists of unit blocks with fixed length, and the service container is carried in the unit blocks. The embodiments of the present disclosure also provide an apparatus for service processing in optical transport network, an electronic device, and a computer readable medium.