Dynamic Spectrum Boundary Adjustment for xDSL Rate Optimization
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Solution Overview
Problem
Existing fixed frequency band division in xDSL systems fails to ensure an optimal uplink-downlink rate ratio, leading to underutilization of spectrum resources and limited downlink data transmission rates, particularly with increasing demands from video services like IPTV and 3D high-definition content.
Innovation Solution
A method and apparatus that dynamically adjust the spectrum boundary between uplink and downlink spectrums based on current and target transmission rate ratios, using line parameter information and on-line reconfiguration to reallocate bits and optimize spectrum utilization, ensuring the downlink data transmission rate meets the required ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed frequency band division is used for uplink and downlink channels, then spectrum resources are allocated in advance, but spectrum resources cannot be fully utilized and downlink data transmission rate is limited
Solution Approach 1:
The patent implements dynamic spectrum division by allowing the DSLAM to adjust the spectrum boundary between uplink and downlink channels based on real-time transmission rate ratios. Instead of using fixed frequency band division, the system continuously monitors the actual uplink-downlink rate ratio and dynamically reallocates spectrum resources to match changing service requirements, thereby fully utilizing spectrum resources and improving downlink data transmission rate.
Solution Approach 2:
The patent changes the spectrum boundary parameter dynamically based on the ratio of uplink to downlink transmission rates. When the actual rate ratio deviates from the target ratio (e.g., 1:4 or 1:9), the system adjusts the spectrum boundary to reallocate frequency resources, ensuring optimal spectrum utilization while meeting service requirements for video services like IPTV and 3D high-definition content.
2Reliability
If redundant frequency spectrum resources are allocated to uplink, then uplink rate requirement is met, but downlink data transmission rate is limited due to improper spectrum division
Solution Approach 1:
The patent dynamically adjusts the spectrum boundary parameter based on the actual uplink-downlink transmission rate ratio. When video services require higher downlink rates, the system reduces the spectrum allocated to uplink and increases downlink spectrum, thereby eliminating redundant uplink allocations and improving downlink data transmission rate while still meeting uplink requirements.
Solution Approach 2:
The patent applies different spectrum allocation strategies to different service types. For video services requiring high downlink rates (like IPTV and 3D HD), the system allocates more spectrum to downlink. This localized optimization ensures that each service receives appropriate spectrum resources based on its specific requirements, rather than using a uniform allocation approach.
3Device complexity
If fixed spectrum division is used, then system configuration is simple, but system cannot adapt to changing service requirements
Solution Approach 1:
The patent transforms the static spectrum division configuration into a dynamic system that automatically adapts to changing service requirements. The DSLAM continuously monitors transmission rate ratios and adjusts spectrum boundaries in real-time, enabling the system to adapt to emerging services like IPTV and 3D high-definition video without requiring manual reconfiguration, thus achieving high adaptability with manageable complexity.
Solution Approach 2:
The patent implements self-service spectrum allocation where the DSLAM automatically monitors its own transmission rate ratios and adjusts spectrum boundaries without external intervention. The system uses its own performance data to make real-time optimization decisions, eliminating the need for complex manual configuration while maintaining high adaptability to changing service requirements.
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
This approach allows for improved downlink data transmission rates and system performance by fully utilizing spectrum resources, adapting to changing service requirements without interrupting existing services, thus enhancing overall system efficiency.
Implementation Method 1
Due to an electromagnetic induction principle, multiple signals accessing the DSLAM cause mutual interference, which is called crosstalk.
Data Source
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AI summary
Embodiments of the present invention relate to the field of communications technologies, and disclose a spectrum division method and apparatus, which can resolve a problem that a downlink data transmission rate and system performance are limited because an existing uplink-downlink spectrum division manner causes a system to fail to fully utilize spectrum resources. The method in the present invention includes: estimating a current ratio of a transmission rate of first-type data to a transmission rate of second-type data according to a spectrum boundary; adjusting the boundary between the first spectrum and the second spectrum when the current ratio is less than a first target ratio, so as to increase the transmission rate of the first-type data, where the first target ratio is predetermined; and determining an updated first spectrum and an updated second spectrum according to an adjusted spectrum boundary. The present invention is applicable to a digital subscriber line access multiplexer.