Dynamic Spectrum Allocation for Secondary Systems
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Solution Overview
Problem
The challenge is to fully utilize limited frequency spectrum resources in wireless communication systems, as existing resources are not fully utilized by primary systems, and new spectrum allocation is rare and expensive, necessitating efficient management to meet growing demands for high-quality and high-speed services.
Innovation Solution
A radio resource management system that dynamically allocates underutilized frequency spectrum from primary systems to secondary systems, ensuring that the disturbance caused by secondary systems remains within the tolerance limits of primary systems, thereby optimizing the use of available spectrum without interfering with primary system operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency spectrum resources are allocated to primary systems, then primary system operations are ensured, but spectrum utilization efficiency deteriorates due to underutilization
Solution Approach 1:
The patent implements dynamic spectrum sharing where the spectrum allocation is not fixed but changes over time based on primary system activity. When primary systems are not using the spectrum, secondary systems can dynamically access it, creating a flexible, adaptive resource allocation mechanism that optimizes utilization while ensuring primary system reliability.
Solution Approach 2:
The system allows secondary systems to self-manage their spectrum usage within defined constraints. The disturbance tolerance parameters enable secondary systems to autonomously determine when and how to use available spectrum without constant primary system intervention, improving overall efficiency while maintaining reliability.
2Productivity
If more spectrum is allocated to meet growing service demands, then service quality and speed improve, but spectrum scarcity and cost worsen
Solution Approach 1:
The patent merges the spectrum usage of primary and secondary systems into a shared resource pool. By combining the resources and coordinating their usage through disturbance tolerance mechanisms, the system effectively increases the total available spectrum for supporting high-quality services without requiring additional frequency allocations.
Solution Approach 2:
The spectrum is designed to serve multiple functions and multiple systems simultaneously. The same frequency resources can be used by primary systems when needed and by secondary systems when primary systems are inactive, creating a universal resource that adapts to different service demands and maximizes the utility of limited spectrum quantities.
3Productivity
If secondary systems use primary system spectrum, then spectrum utilization improves, but interference to primary systems increases
Solution Approach 1:
The patent changes the operational parameters of secondary systems based on primary system activity. By adjusting transmission power, spectrum access decisions, and operational constraints according to primary system disturbance tolerance, the system enables spectrum sharing while controlling interference levels to protect primary system operations.
Solution Approach 2:
The system implements feedback mechanisms where secondary systems monitor primary system activity and adjust their spectrum usage accordingly. Disturbance tolerance parameters provide feedback information that guides secondary system behavior, ensuring that spectrum utilization is optimized while interference to primary systems remains within acceptable limits.
Data Source
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AI summary
A spectrum management system includes circuitry that determines available spectrum for a secondary communication system. The available spectrum is determined based on a disturbance tolerance of a primary communication system that is managed by the spectrum management system and a disturbance tolerance of another primary communication system that is managed by another spectrum management system. The circuitry then causes the setting of a spectrum for the secondary communication system based on the available spectrum and whether or not a spectrum request is received from the secondary communication system.