VDSL2 Transceiver Power Management via Tone Group Segmentation
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Solution Overview
Problem
The VDSL2 protocol faces challenges in power management due to higher complexity and increased power consumption, especially in upstream communication, which leads to instability and crosstalk issues, and the existing ADSL2 power management states are not robust enough to meet the requirements of VDSL2 applications.
Innovation Solution
The introduction of a low power state with multiple PM profiles and online reconfiguration capabilities in the VDSL2 transceiver, allowing for efficient power management by transitioning between states and profiles using PM commands, and representing upstream/downstream sub-carriers through tone groups to reduce memory and processing burdens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the VDSL2 protocol uses higher data rates and more sub-carriers to improve bandwidth, then the data transmission capacity is improved, but the power consumption and system complexity increase significantly
Solution Approach 1:
The patent implements dynamic power management by allowing the VDSL2 transceiver to transition between different power management states (L0 full on, L2 low power, L3 idle) based on traffic conditions. The system dynamically adjusts the number of active sub-carriers and data rates according to channel conditions and traffic demands, enabling the transceiver to operate at optimal power levels while maintaining required service quality.
2Productivity
If the VDSL2 transceiver increases the number of sub-carriers for higher data rates, then the bandwidth is improved, but the memory and processing complexity increase
Solution Approach 1:
The patent segments the large number of VDSL2 sub-carriers into multiple tone groups, where each tone group contains a subset of sub-carriers. This segmentation allows the system to manage and process sub-carriers in smaller, more manageable units. The tone group structure enables efficient power management by allowing selective activation/deactivation of specific tone groups rather than managing all sub-carriers individually, thereby reducing memory and processing complexity while maintaining high bandwidth capability.
3Device complexity
If the existing ADSL2 power management states are used for VDSL2, then the implementation is simpler, but the power management is not robust enough to meet VDSL2 requirements
Solution Approach 1:
The patent extends the ADSL2 power management framework by introducing new power management states and parameters specifically tailored for VDSL2 requirements. It defines three distinct states (L0, L2, L3) with specific characteristics for full on, low power, and idle modes. The system implements state transition mechanisms and profile management that adapt to VDSL2's higher data rates and more sub-carriers, providing robust power management while maintaining compatibility with existing DSL power management concepts.
4Reliability
If the VDSL2 transceiver operates in full on mode continuously, then the service quality is maintained, but the power consumption increases
Solution Approach 1:
The patent implements periodic power management by allowing the transceiver to alternate between full on mode (L0) and low power mode (L2) based on traffic patterns and channel conditions. The system can transition to low power state during periods of reduced traffic or when channel conditions deteriorate, and return to full on state when service quality requires it. This periodic switching between operational states enables the system to maintain service quality while reducing average power consumption.
Data Source
AI summary
An apparatus comprising a processor configured to determine a power management (PM) state from a plurality of PM states for a digital subscriber line (DSL) transceiver, wherein the plurality of PM states comprise a idle state, a full on state, and a low power state, wherein the full on state consumes more power than the low power state, wherein the low power state consumes more power than the idle state, wherein the low power state comprises at least one PM profile, and wherein the DSL transceiver supports a very high speed digital subscriber line 2 (VDSL2) data transmission protocol, and instruct the DSL transceiver to use the PM state.