Crosstalk Cancellation Across Access Devices
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Solution Overview
Problem
Existing crosstalk cancellation methods are limited in scenarios where subscribers on the same cable bundle are connected to different access devices, as they require all subscribers to be connected to the same access device or line card, restricting the number of accessible subscribers.
Innovation Solution
A method and system for crosstalk cancellation processing on a port line of an access device, where interconnected access devices share line configuration information to compute and cancel crosstalk effects across different access devices using a common line group identifier, allowing subscribers on the same cable bundle to be connected to different access devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a centralized vectoring processing board is used to complete coordinated processing on all port lines, then the number of subscribers that can access the access device is increased, but the device complexity increases and requires all subscribers to be connected to the same access device
Solution Approach 1:
The patent divides the crosstalk cancellation function into multiple independent access devices, each capable of performing vectoring processing on its own port lines. Instead of requiring a single centralized processing board, multiple access devices can independently execute crosstalk cancellation, thereby reducing the complexity requirement on individual devices while maintaining the ability to serve multiple subscribers.
Solution Approach 2:
The patent enables each access device to perform crosstalk cancellation processing on its own port lines, making every access device universally capable of serving multiple subscribers. This multi-functionality allows any access device in the network to independently handle crosstalk issues, eliminating the need for specialized centralized processing boards.
2Reliability
If board-level vectoring processing is used to eliminate far-end crosstalk, then crosstalk cancellation is achieved, but the solution is only applicable when all subscribers are connected to the same line card
Solution Approach 1:
The patent segments the crosstalk cancellation capability across multiple access devices rather than concentrating it on a single line card. Each access device independently performs vectoring processing on its connected port lines, enabling reliable crosstalk cancellation even when subscribers are distributed across different access devices.
Solution Approach 2:
The patent introduces a configuration information exchange mechanism as an intermediary between access devices. By sharing line configuration information including line group identifiers, access devices can coordinate their crosstalk cancellation processing effectively, enabling the system to handle subscribers connected to different access devices while maintaining crosstalk cancellation reliability.
3Adaptability or versatility
If system-level vectoring processing with centralized VP is used, then subscribers on the same cable bundle can access the system, but the solution cannot satisfy scenarios where subscribers are connected to different access devices
Solution Approach 1:
The patent segments the vectoring processing function across multiple access devices, allowing each device to independently serve subscribers on its connected cable bundles. This segmentation enables the system to accommodate subscribers distributed across different access devices while maintaining effective crosstalk cancellation, thereby expanding system coverage without sacrificing productivity.
Data Source
AI summary
Embodiments of the present invention disclose a method and a related device and system for crosstalk cancellation processing on a port line of an access device. The method for crosstalk cancellation processing on a port line of an access device includes: obtaining line configuration information of another access device connected to—a first access device, and line group identities of different port lines belonging to a same cable bundle are the same; respectively obtaining, by the first access device, according to the line configuration information of the another access device, a coefficient of an effect from a port line of the another access device having a same line group identifier as that of a local port line on the local port line; and performing crosstalk cancellation processing on the local port line on the basis of the obtained effect coefficient.