Vectored System CPE Training Optimization
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Solution Overview
Problem
Existing VDSL systems face challenges in efficiently initializing a group of CPE devices during training, particularly when some devices register late, leading to suboptimal crosstalk cancellation and increased training times due to sequential activation requirements.
Innovation Solution
A novel method that determines CPE device capabilities during a Joining Phase and places late-registered devices in a hold status, allowing for additional Joining Phases to register them, while maintaining active lines to prevent interference and enable parallel training of multiple lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sequential activation is used to initialize CPE devices during training, then crosstalk cancellation is improved, but training time increases
Solution Approach 1:
The system dynamically adjusts the initialization process by allowing multiple CPE devices to transition from idle to active state simultaneously during the join phase, rather than following a fixed sequential pattern. This dynamic approach enables parallel training while maintaining crosstalk cancellation through coordinated signal transmission and reception across multiple lines.
Solution Approach 2:
The system performs preliminary capability determination for all joining CPE devices during the join phase before actual data transmission begins. By pre-assessing vectoring capabilities and establishing initial synchronization, the system prepares multiple devices for parallel operation, eliminating the need for sequential activation while maintaining training integrity.
2Productivity
If multiple CPE devices are trained in parallel, then training time is reduced, but device complexity increases
Solution Approach 1:
The initialization process is segmented into distinct phases: join phase for capability determination, training phase for parameter optimization, and operational phase for data transmission. Each phase handles specific tasks independently, allowing multiple devices to progress through phases simultaneously without requiring complex coordinated control, thus reducing overall system complexity while maintaining parallel training efficiency.
3Loss of time
If late-registered CPE devices are immediately integrated, then training time is reduced, but connection stability decreases
Solution Approach 1:
Late-registered CPE devices undergo preliminary capability assessment and synchronization during the join phase before being fully integrated into the vectored group. This preliminary action ensures that all devices, regardless of registration timing, establish proper synchronization and parameter alignment, maintaining connection stability while minimizing additional training time.
Data Source
AI summary
A method for initialization of a group of customer premises equipment devices (CPEs) during a training that registers capabilities of the CPEs is disclosed, wherein at least one CPE registers late to the training and cannot be registered. The method includes determining capabilities of the CPEs during a joining phase of the training, wherein it is determined whether a CPE device is capable of employing vectoring and placing in a hold status the at least one CPE that registers late by keeping a line active that is coupled to the at least one CPE. The method further includes providing another joining phase after the joining phase to register the at least one CPE that registers late.