DSL Modem Dynamic Standard Selection for Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DSL communication systems face inefficiencies in data rate optimization, particularly in scenarios where higher data rate standards do not always result in better performance due to noise interference and computational limitations, leading to substantial initialization and training overhead.
Innovation Solution
A client premises transceiver system that can dynamically select and configure itself to operate under a lower data rate standard for improved performance, while maintaining control message processing at a higher standard, and issuing a 'blackout' signal to block high-frequency subchannels for enhanced data reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the system operates under a higher data rate standard, then the theoretical data rate capacity is improved, but the noise interference and computational complexity increase leading to degraded performance
Solution Approach 1:
The receiver dynamically changes the operating standard parameter from higher data rate standards to lower data rate standards based on channel conditions. The system monitors noise levels and computational resource availability, then adjusts the standard parameter to optimize the balance between data rate capacity and communication reliability, resolving the contradiction by adapting the parameter to current system state
2Productivity
If the system uses higher data rate standards, then more subchannels are utilized, but the initialization and training overhead increases substantially
Solution Approach 1:
The system performs preliminary analysis of channel conditions and computational capabilities before full initialization. By assessing noise levels and available processing resources in advance, the system pre-determines the optimal standard to use, avoiding unnecessary initialization overhead for higher standards when conditions do not support them, thus reducing time loss while maintaining productivity
3Productivity
If the receiver processes control messages at a higher data rate standard, then control information is transmitted efficiently, but the payload data processing cannot utilize the same high standard due to computational limitations
Solution Approach 1:
The system segments the data processing into two distinct paths: control messages are processed at the higher data rate standard for efficient transmission, while payload data is processed at a lower standard that matches the receiver's computational capabilities. This segmentation allows each component to operate at its optimal performance level without compromising the other, resolving the contradiction between productivity and device complexity
Data Source
AI summary
A client premises digital subscriber line (DSL) modem having multi-mode capability is disclosed. In initialization, the modem estimates whether channel conditions are such that digital processing of the received data according to a lower data rate DSL standard, such as ADSL2, may result in a higher effective data rate than receipt and processing according to a higher data rate DSL standard, such as ADSL2+. If so, the DSL modem configures itself, such as by configuring its filter characteristics and sampling frequency, to receive and process data according to the lower data rate DSL standard; the transmitting modem, for example at a central office or service area interface, may continue to operate according to the higher data rate standard (with its bit loading corresponding to a subset of subchannels). The receiving DSL modem processes the payload data according to the lower standard, while processing control messages according to the higher standard.