Optical TDM Signal Routing via Dummy Data Frames
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical data transmission in ring networks faces challenges due to signal impairments such as noise accumulation and attenuation, which can lead to incorrect data frame recovery and transmission failures, especially when signals propagate over long distances without regeneration.
Innovation Solution
The method involves generating and transmitting optical TDM signals with header information frames indicating dummy data frames, allowing network nodes to avoid recovering impaired signals and enabling data transmission along a secondary ring by inserting these signals with dummy data markers, ensuring optical amplifiers remain loaded and preventing transient signal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If optical TDM signals are transmitted over long distances without regeneration, then network coverage is extended, but signal quality deteriorates due to noise accumulation and attenuation
Solution Approach 1:
The patent applies preliminary action by inserting dummy data frames with specific markers into the TDM signals before transmission. These markers enable receiving nodes to identify and discard impaired data frames before they cause errors, effectively preparing the signal pathway in advance to handle long-distance transmission challenges without regeneration.
2Length of stationary object
If optical amplifiers are used to extend transmission distance, then signal attenuation is compensated, but transient signal components are generated that interfere with data signals
Solution Approach 1:
The patent converts the harmful effect of transient signal components into a beneficial filtering mechanism. By inserting dummy data frames with recognizable markers, the system enables receiving nodes to identify and remove corrupted data frames that result from amplifier-induced transient components, thus transforming the harm into a detectable and correctable condition.
3Ease of operation
If all optical TDM signals are terminated at each network node, then data frame routing control is simplified, but network efficiency decreases due to unnecessary signal processing
Solution Approach 1:
The patent extracts the routing control function from the data frames themselves and places it into separate header information frames. This extraction allows nodes to process only the compact header information for routing decisions, while data frames can be forwarded without full termination and processing, thereby improving network efficiency while maintaining simplified routing control.
4Adaptability or versatility
If header information frames are used to control data frame routing, then routing flexibility is improved, but signal complexity increases
Solution Approach 1:
The patent segments the TDM signal structure into distinct components: header information frames containing routing control data and separate data frames carrying payload information. This segmentation allows routing flexibility through programmable header processing while keeping the data frame structure simple and efficient for high-speed forwarding, thus resolving the complexity-flexibility trade-off.
Data Source
Figure 1a~1c
Figure 2
Figure 3
AI summary
Proposed is a method of data transmission. A number of optical network elements are connected by a first optical ring and a second optical ring. In a first configuration state of an optical network node, optical TDM signals are received at a network node along the first optical ring and transmitted along the first optical. Upon detecting a failure behind the optical network node, the node switches to a second configuration state, in which the received optical TDM signals are transmitted along the second optical ring in the opposite transmission direction.