Digital Subscriber Line Crosstalk Reduction via Vectoring Group Assignment
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Solution Overview
Problem
As the number of digital subscriber lines increases, reducing crosstalk becomes progressively more difficult, limiting the ability to increase bit rate capacity for broadband services.
Innovation Solution
Determining crosstalk characteristics of digital subscriber lines and rearranging their terminations at an access node to assign correlated pairs to a common vectoring group, using a crosstalk analyzer and cross-connection switching system to reduce crosstalk by grouping digital subscriber lines with similar characteristics together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of digital subscriber lines is increased to provide more broadband services, then service capacity is improved, but crosstalk among lines increases making signal management more difficult
Solution Approach 1:
The patent combines multiple digital subscriber lines into vectoring groups where lines with correlated crosstalk characteristics are grouped together. By merging these lines and applying coordinated signal processing within each group, the system reduces the overall crosstalk impact while maintaining high service capacity across many simultaneous lines.
Solution Approach 2:
The patent applies different treatment to different groups of lines based on their specific crosstalk characteristics. Rather than treating all lines uniformly, the system analyzes and groups lines locally based on their correlation patterns, applying targeted vectoring strategies to each group to optimally reduce their specific crosstalk issues.
2Object-affected harmful factors
If traditional crosstalk reduction methods are used, then some crosstalk is reduced, but the method becomes progressively more difficult and less effective as the number of lines increases
Solution Approach 1:
The patent segments the large set of digital subscriber lines into smaller vectoring groups based on crosstalk correlation analysis. This segmentation transforms the complex problem of managing all lines individually into more manageable groups that can be processed together, reducing overall system complexity while maintaining effective crosstalk reduction.
Solution Approach 2:
The patent changes the organizational parameter of line management from individual line processing to grouped vectoring processing. By changing how lines are organized and processed (from individual to correlated groups), the system achieves better scalability and reduced complexity as line counts increase.
Data Source
AI summary
A method includes identifying, at a processor of a crosstalk analyzer, a first communication line of a plurality of communication lines and a second communication line of the plurality of communication lines. The first communication line and the second communication line identified based on a correlation of a crosstalk parameter with respect to the first communication line and the second communication line. The method also includes, responsive to identifying the first communication line and the second communication line, assigning, by the processor, the first communication line to a first port of an access node and the second communication line to a second port of the access node.