Bidirectional DSL Amplifier Switching for TDD and FDD Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current DSL amplifiers face challenges in efficiently extending data rates and coverage, particularly with the increasing demand for higher speeds and the need for seamless upgrades in G.Fast and VDSL2 systems, while maintaining equipment costs and complexity at manageable levels.
Innovation Solution
A multifunctional amplifier designed for Time Division Duplex (TDD) and Frequency Division Duplex (FDD) signals, featuring bidirectional terminals, filters, and an amplifier circuit that can switch configurations to amplify signals in either direction, along with a control circuit to manage amplification based on signal presence, enabling efficient signal propagation over copper lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate amplifiers are used for TDD and FDD signals, then signal amplification performance is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a single amplifier circuit that can operate in multiple configurations to handle both TDD and FDD signals. The amplifier circuit is designed with bidirectional terminals and can be controlled to amplify signals in different directions and frequency spectrums, eliminating the need for separate amplifiers for each signal type while maintaining performance.
Solution Approach 2:
The amplifier circuit incorporates a control circuit that dynamically switches between different operational configurations based on the signal type (TDD or FDD). The control circuit adjusts the amplifier's behavior in real-time, enabling it to adapt to different signal requirements without requiring separate dedicated hardware for each mode.
2Device complexity
If a multifunctional amplifier is used for both TDD and FDD signals, then device complexity is reduced, but signal amplification performance may deteriorate
Solution Approach 1:
The amplifier circuit is divided into functional segments with bidirectional terminals that can independently process different signal types. The circuit includes separate signal paths and filtering mechanisms that allow TDD and FDD signals to be handled independently within the same physical device, ensuring performance is not compromised by the integration.
Solution Approach 2:
The control circuit acts as an intermediary that manages the amplifier's operational state based on the input signal type. It coordinates the amplifier's response to ensure optimal performance for either TDD or FDD signals, preventing performance degradation through intelligent control and configuration management.
3Productivity
If amplifier circuit amplifies signals in both directions simultaneously, then bidirectional communication is improved, but signal interference and stability worsen
Solution Approach 1:
For TDD signals, the amplifier circuit operates in periodic intervals, alternating between amplifying upstream and downstream signals based on the time-division duplexing scheme. The control circuit synchronizes the amplification periods with the signal transmission timing, ensuring that signals are amplified only during their designated time slots, thus preventing interference while maintaining bidirectional communication.
4Speed
If amplifier circuit is designed for high data rates, then transmission speed is improved, but equipment cost increases
Solution Approach 1:
The amplifier circuit is designed as a universal platform that can support both VDSL2 and G.Fast standards, as well as both TDD and FDD signaling modes. This multi-functionality allows the same hardware to achieve high data rates across different standards without requiring separate expensive equipment for each standard, thereby reducing overall equipment costs while maintaining high transmission speeds.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively extends data rates and coverage for G.Fast and VDSL2 services, providing up to double the speed of VDSL2 and higher speeds than G.Fast, while reducing equipment complexity and costs, and supporting seamless upgrades, thus addressing the need for higher performance and density.
Implementation Method 1
an amplifier circuit arranged in a signal path between first and second bidirectional terminals to amplify signals
Implementation Method 2
at least one first filter connected between said first and second bidirectional terminals for bypassing signals
Data Source
AI summary
A multifunctional amplifier for Time Division Duplex signals and Frequency Division Duplex signals in Very High Bit-Rate Subscriber Line, is disclosed. The multifunctional amplifier may include a first and second bidirectional terminals, at least one first filter connected between said first and second bidirectional terminals for bypassing signals in a first configuration, an amplifier circuit arranged in a signal path between first and second bidirectional terminals to amplify said signals, the amplifier circuit being operable in a second configuration for amplifying said signals in one direction along the signal path and a third configuration for amplifying said signals in the opposite direction along the signal path, and a control circuit arranged to control said amplifier circuit to change configuration.