xDSL Frequency Segmentation for Guaranteed VoIP Bandwidth
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Solution Overview
Problem
Current xDSL technologies do not provide guaranteed IP access bandwidth for time-critical applications like VoIP and streaming media, leading to potential bottlenecks and quality issues due to shared bandwidth among multiple users.
Innovation Solution
Utilizing the lower frequency range traditionally reserved for PSTN/ISDN applications for exclusive, high-quality, and time-critical IP services like VoIP, ensuring these applications do not compete with other data traffic and maintain constant bandwidth by routing them through an exclusive VoIP connection, which can be located further away from the customer, thereby avoiding bandwidth fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If xDSL technology uses shared bandwidth for multiple users, then network capacity is improved, but bandwidth guarantee for time-critical applications deteriorates
Solution Approach 1:
The patent segments the network into two distinct paths: a shared xDSL path for non-time-critical data traffic and an exclusive VoIP connection path for time-critical voice traffic. This segmentation allows the system to maintain high network capacity through sharing while ensuring reliable bandwidth guarantees for critical applications through dedicated resources.
Solution Approach 2:
The patent extracts time-critical VoIP traffic from the shared xDSL bandwidth and routes it through a separate exclusive connection. This extraction ensures that VoIP applications receive guaranteed bandwidth independent of other users' data traffic, resolving the contradiction between shared capacity and individual guarantees.
2Productivity
If xDSL applications use higher frequency range (20 kHz and above), then data throughput is improved, but signal attenuation worsens
Solution Approach 1:
The patent applies different frequency quality characteristics to different application types: higher frequency ranges (20 kHz and above) are allocated for data traffic where high throughput is prioritized, while lower frequency ranges are reserved for voice traffic where signal quality and low attenuation are prioritized. This local quality differentiation resolves the contradiction between throughput and attenuation.
3Productivity
If VoIP applications run over xDSL in higher frequency range, then data capacity is improved, but service quality deteriorates
Solution Approach 1:
The patent extracts VoIP traffic from the xDSL frequency spectrum entirely and routes it through a separate exclusive connection infrastructure. This extraction eliminates the quality degradation caused by sharing high-frequency bandwidth with other data traffic, while xDSL retains full data capacity for non-time-critical applications.
4Productivity
If multiple users share IP access bandwidth, then network efficiency is improved, but individual bandwidth guarantee deteriorates
Solution Approach 1:
The patent segments IP access into two categories: shared access for non-time-critical data traffic that maximizes network efficiency through multiplexing, and exclusive access for time-critical VoIP traffic that guarantees individual bandwidth requirements. This segmentation resolves the contradiction between overall efficiency and individual guarantees.
Data Source
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AI summary
The method involves separating a fragment (3) in a frequency range during retention of the technology for x-DSL applications in an upper frequency range of a customer. An exclusive VoIP connection (12) is provided in connection with a VoIP customer terminal (1a) for the access to high-quality and time-critical applications of IP, and VoIP or Internet radio is made available : An independent claim is included for an arrangement for the improvement of the transmission of time-critical applications of IP under use of the xDSL technology.