Fixed-Length MTN Frame Containers for CBR Service Bearing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Constant bit rate (CBR) services like E1 cannot be directly populated into Metro Transport Network (MTN) paths due to bandwidth gaps and inconsistent delay performance, leading to inefficient carrying and complex implementations when multiple CBR signals are combined.
Innovation Solution
A frame container with a fixed frame length is used in the MTN path to carry multiple CBR signals, mapped with interleaving based on a fixed byte length, and includes an S0 block, a data block, and a T block, with frame overheads for indications and adjustments to ensure consistent delay and bandwidth adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple CBR signals are carried in one MTN path with different frame formats, then the CBR services can be transmitted, but the implementation becomes complicated and delay performance becomes inconsistent
Solution Approach 1:
Multiple CBR signals with different frame formats are merged into a single unified frame structure. The patent combines multiple E1 signals (each with different frame formats) into one standardized MTN path frame, eliminating the need to handle multiple separate frame formats and reducing implementation complexity.
Solution Approach 2:
A universal frame structure is designed that can accommodate multiple types of CBR signals simultaneously. The unified frame format serves as a multi-functional container that can carry different CBR services (such as multiple E1 signals) through standardized mapping relationships, making the system adaptable to various signal types without requiring format-specific handling.
2Adaptability or versatility
If multiple CBR signals are carried in one MTN path with different frame formats, then the CBR services can be transmitted, but delay performance becomes inconsistent across different paths
Solution Approach 1:
By merging multiple CBR signals into a single unified frame structure transmitted over one MTN path, the patent eliminates the inconsistency caused by multiple separate paths. All signals share the same transmission path and experience uniform delay characteristics, ensuring consistent delay performance across all carried signals.
3Ease of manufacture
If CBR bitstream is directly populated into MTN path, then the transmission process is simplified, but the bandwidth gap between CBR services and MTN path cannot be resolved
Solution Approach 1:
The patent applies parameter changes by transforming the CBR bitstream parameters to match MTN path requirements. Through bitstream mapping and frame structure transformation, the bandwidth parameters are adjusted to fit the MTN path's 10 Mbps minimum granularity while maintaining the original CBR signal characteristics. This resolves the bandwidth gap issue without significantly complicating the transmission process.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Disclosed in embodiments of the present disclosure are a constant bit rate (CBR) service bearing method and apparatus, an electronic device, and a storage medium. The method comprises: in a metropolitan transmission network channel, transmitting a frame container which bears a CBR service and has a fixed frame length, wherein the frame container comprises a S0 code block, a data code block, i.e., a D code block, and a T code block; the frame container is used for loading multiple paths of CBR service data; and the multiple paths of CBR service data are mapped, by interleaving according to a fixed byte length, to an area where service payload is placed in the frame container.