Expandable DSLAM Vectoring via Segmented Expansion Modules
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Solution Overview
Problem
VDSL vectoring technologies are processing intensive and costly, limiting their implementation due to the exponential increase in processing requirements with the number of subscriber lines, making it burdensome for network service providers to upgrade non-vectoring DSLAMs to vectoring solutions, especially in outside plant environments.
Innovation Solution
The system employs an expandable communication architecture with segregated compartments in DSLAMs, allowing for the addition of expansion modules with vector engines to migrate from non-vectoring to vectoring solutions without replacing existing transceiver modules, enabling flexible and cost-effective crosstalk vectoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If VDSL vectoring is implemented to cancel crosstalk, then signal quality and network reach are improved, but processing requirements and system cost increase exponentially
Solution Approach 1:
The system segments the DSLAM into a host unit and separate expansion modules. The vectoring functionality is isolated in expansion modules that can be independently added, rather than requiring the entire DSLAM to be redesigned. This segmentation allows the complex vectoring processing to be separated from the base transceiver module, reducing the complexity burden on the original system architecture.
Solution Approach 2:
The system enables dynamic configuration where expansion modules with vectoring capability can be added or removed based on network needs. The DSLAM can transition from a non-vectoring configuration to a vectoring configuration by simply inserting expansion modules, making the system adaptable rather than fixed, thereby managing complexity through flexibility.
2Ease of manufacture
If non-vectoring VDSL transceiver modules are installed to reduce cost, then system cost is reduced, but future upgradeability and flexibility are limited
Solution Approach 1:
The transceiver module is segmented into a base unit and an optional expansion module. The base unit can be manufactured without expensive vectoring capabilities, keeping initial costs low. The expansion module with vectoring functionality can be added later when needed, providing upgradeability without requiring the base unit to be over-engineered for future requirements.
Solution Approach 2:
The expansion module is designed to be universally compatible with the base transceiver module, enabling the same hardware platform to serve multiple functions - both vectoring and non-vectoring modes. This multi-functionality allows the system to adapt to different network requirements and provides a clear upgrade path from basic to advanced functionality.
3Reliability
If vector engines are added to existing DSLAMs to enable vectoring, then crosstalk cancellation capability is improved, but installation complexity and time requirements increase
Solution Approach 1:
The vectoring capability is segmented into separate expansion modules that plug into the existing DSLAM architecture. This modular approach allows technicians to add vectoring functionality by simply inserting expansion modules into accessible compartments, rather than performing complex surgical replacements or reconfigurations of the entire DSLAM unit, thereby reducing installation time.
Solution Approach 2:
The expansion modules are pre-configured with the necessary vectoring hardware and software components before delivery to the site. This preliminary preparation eliminates the need for complex on-site configuration or programming, allowing technicians to simply plug in the modules and activate vectoring functionality, significantly reducing installation time and complexity.
Data Source
AI summary
A communication system utilizes at least one digital subscriber line access multiplexer (DSLAM) at an intermediate point between a network facility and one or more customer premises. Initially, as few as one DSLAM, may be implemented at the intermediate point, but the system can be expanded to include any number of DSLAMs at the intermediate point. Any of the DSLAMs at the intermediate point can be selectively upgraded at any time to a vectoring solution as may be desired. The use of such DSLAMs provides the network service provider with flexibility in implementing and maintaining the network.