Scalable Crosstalk Cancellation via Distributed Computing Center and Module
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Solution Overview
Problem
Current crosstalk cancellation systems, particularly in DSL networks, face limitations in scalability and flexibility due to fixed capacity Vectoring Control Entity (VCE) chips, which can only process a specific number of ports and require customization for different port configurations.
Innovation Solution
Deploying a crosstalk cancellation apparatus with a computing center and cancellation module in different physical locations, allowing for expansion by adding more cancellers and computing resources without needing new chips, enabling flexible processing for varying port quantities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the VCE chip capacity is fixed to process a specific quantity of ports, then the chip design is simplified and manufacturing is easier, but the system flexibility and adaptability to different port configurations deteriorates
Solution Approach 1:
The VCE chip is segmented into a control module and a crosstalk cancellation module. The control module handles configuration and coordination, while the crosstalk cancellation module is designed with configurable resources (cancellers) that can be dynamically allocated based on port requirements. This segmentation allows the same chip to adapt to different port configurations without requiring complete redesign.
Solution Approach 2:
The crosstalk cancellation module employs dynamic resource allocation where the quantity of cancellers can be configured based on the actual number of ports. The system can dynamically adjust the operational state of cancellers and allocate computing resources accordingly, enabling the fixed-capacity chip to handle variable port configurations flexibly.
2Adaptability or versatility
If the VCE chip is customized for different port quantities, then the system adaptability improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The VCE chip is designed as a universal platform that can serve multiple port configurations through configurable parameters. The crosstalk cancellation module contains a pool of cancellers that can be allocated to different port combinations, and the control module coordinates these resources universally across various DSL technologies (ADSL, VDSL, G.fast) and port quantities, eliminating the need for multiple customized chip designs.
Solution Approach 2:
The system achieves adaptability through parameter changes rather than structural modifications. The quantity of cancellers, computing resource allocation, and operational configurations are adjusted as parameters based on port requirements. This allows a single chip design to handle different scenarios by changing operational parameters without increasing device complexity.
3Adaptability or versatility
If more cancellers and computing resources are added to handle increased port quantities, then the system scalability improves, but the manufacturing cost and device complexity increase
Solution Approach 1:
The crosstalk cancellation module is designed with a nested structure where multiple cancellers are organized in a hierarchical manner. The control module nests the coordination logic within the cancellation module, and cancellers are nested with configurable resource pools. This nested architecture allows scalable resource allocation where additional cancellers can be integrated into the existing structure without proportionally increasing overall system complexity.
Data Source
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AI summary
This application provides a crosstalk cancellation method, apparatus, and system, and relates to the field of communications technologies. The crosstalk cancellation apparatus may include a computing center and a cancellation module that are deployed in different physical locations. The cancellation module may include at least one canceller. The computing center may be connected to the cancellation module through a first network interface, and connected to a baseband chip through a second network interface. Therefore, when a quantity of signal transceiver ports of a central office device increases, a crosstalk cancellation scale of the crosstalk cancellation apparatus can be expanded by increasing a quantity of cancellers in the cancellation module and allocating more computing resources to the computing center. In this expansion method, there is no need to customize a new chip, and expansion is relatively simple. Therefore, crosstalk cancellation processing can be flexibly performed for central office devices with different quantities of ports.