Communication System Expandable Capacity Without Frequency Gaps
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional communication systems face limitations in expanding network capacity due to the need for frequency gaps between channels, which reduce spectral efficiency and require replacement of legacy nodes capable of single-channel operation.
Innovation Solution
The method involves adding new channels without frequency gaps, allowing legacy nodes to operate by adjusting bit loading based on traffic conditions, maintaining spectral efficiency and enabling legacy nodes to function with reduced capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency gaps are inserted between neighboring channels to reduce interference, then channel separation and interference reduction are improved, but spectral efficiency deteriorates due to unused frequency space
Solution Approach 1:
The patent extracts and removes the frequency gap (guard band) that traditionally separates channels. By eliminating this unused spectral space, the system achieves continuous spectrum utilization while maintaining channel separation through alternative means (filtering and interference management), thus resolving the contradiction between reliable channel separation and spectral efficiency.
Solution Approach 2:
The patent changes the parameter of channel separation from frequency-based spacing to filter-based separation. Instead of maintaining frequency gaps, the system uses advanced filtering techniques to separate channels in the frequency domain, allowing adjacent channels to be placed immediately next to each other without interference, thereby achieving 100% spectral efficiency.
2Adaptability or versatility
If legacy nodes operating on single channel are replaced with multi-channel nodes to expand network capacity, then network capacity and adaptability are improved, but device complexity and cost increase
Solution Approach 1:
The patent segments the network into two distinct parts: legacy nodes that continue operating on single channels and new multi-channel nodes that operate on multiple channels. This segmentation allows the network to expand capacity through additional nodes without requiring modification of existing legacy nodes, thereby avoiding increased device complexity while maintaining adaptability.
Solution Approach 2:
The patent creates a universal network architecture where both single-channel legacy nodes and multi-channel new nodes can coexist and interoperate. The system is designed to accommodate multiple node types with different capabilities, allowing legacy nodes to function in their original capacity while new nodes provide enhanced multi-channel functionality, thus expanding overall network capacity without forcing complexity onto legacy devices.
3Productivity
If additional channels are added to expand network capacity, then network throughput is improved, but interference between channels increases without frequency gaps
Solution Approach 1:
The patent introduces filtering mechanisms as intermediary elements between adjacent channels. These filters act as mediators that allow channels to be placed immediately adjacent to each other (enabling continuous spectrum use and high throughput) while simultaneously blocking interference between them. The filtering technology serves as the intermediary that reconciles the need for high throughput with the need to prevent interference.
Data Source
AI summary
Systems and methods for expanding capacity in a network without the use of frequency gaps between a legacy channel and/or newly added channels are provided. Systems and methods for maintaining legacy node operability in the expanded capacity network are also provided by determining the increased power experienced by a legacy node as a result of the newly added channels, and dynamically adapting the modulation utilized on the legacy channel commensurate with the increased power.