Vectoring for Discontinuous DSL Operation Power Management
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Solution Overview
Problem
Current DSL systems face limitations in achieving high bit rates due to long copper loops, requiring numerous small distribution points with restrictive power consumption and installation challenges, especially when aiming for bit rates up to 1.0 Gb/s, which necessitates efficient power-saving methods.
Innovation Solution
The implementation of discontinuous operation in communication systems, where transmission occurs only when data is available, and the use of efficient precoder and decoder matrix updates to minimize power consumption and complexity, allowing for flexible installation and reduced power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vectoring is used to increase bit rates up to 100 Mb/s, then transmission performance is improved, but power consumption increases making flexible installation difficult
Solution Approach 1:
The patent implements discontinuous operation where the DP alternates between active transmission periods and sleep periods. During sleep periods, the DP turns off its transmitter and receiver, significantly reducing power consumption while maintaining high bit rates during active periods through vectoring technology.
Solution Approach 2:
The system dynamically adjusts its operation mode based on traffic conditions, switching between continuous and discontinuous operation. The DP can transition between different power states (active, sleep, deep sleep) to optimize the trade-off between power consumption and transmission performance in real-time.
2Productivity
If many small distribution points are installed to achieve high bit rates over short loops, then transmission performance is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The DP is designed as a universal device that can be installed in multiple locations (street cabinets, MDU-cabinets, pole-mounted, wall-mounted) and serves multiple functions including vectoring, power management, and flexible deployment scenarios. This multi-functionality reduces the need for specialized equipment for different installation scenarios.
Solution Approach 2:
The system changes operational parameters such as power consumption levels, transmission modes, and operational states to enable flexible installation options. By adjusting these parameters, the same DP can adapt to different installation environments and power availability scenarios.
3Adaptability or versatility
If reverse feeding is used to power DPs for flexible installation, then installation flexibility is improved, but power consumption restrictions increase
Solution Approach 1:
The DP uses periodic transmission and sleep cycles to manage power consumption when reverse-fed. During sleep periods, power consumption is minimized to stay within the limits of reverse feeding capability, while still providing high-speed transmission during active periods.
Solution Approach 2:
The system maintains continuous service availability through discontinuous operation, where the DP alternates between active and sleep states. This ensures that useful transmission action continues over time while managing instantaneous power consumption to fit reverse feeding capabilities.
Data Source
AI summary
Methods, devices and techniques are disclosed where vectoring is adapted to lines becoming inactive and active, for example in a discontinued operation. In some embodiments, the vectoring is modified based on already present coefficients.