Cognitive Radio Standby Frequency Selection via System Collaboration
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Solution Overview
Problem
Cognitive radio systems face challenges in determining backup frequencies, leading to instability and performance issues, as they cannot reference backup frequencies from other cognitive systems.
Innovation Solution
A method and device that allow a cognitive radio system to obtain and select backup frequencies from other cognitive systems with overlapping coverage areas, using a terminal to transmit and determine the most suitable frequency for seamless switching without interfering with the incumbent system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cognitive system determines backup frequency independently without referencing other cognitive systems, then the system operation is simple, but the system stability and performance deteriorate
Solution Approach 1:
The patent merges the frequency determination processes of multiple cognitive systems by having them share backup frequency information through terminals. The first cognitive system combines its own backup frequency list with information from the second cognitive system to create a comprehensive frequency selection strategy, thereby improving reliability through collaborative decision-making
Solution Approach 2:
The patent implements feedback mechanisms where cognitive systems exchange backup frequency information and operational status through terminals. This feedback loop allows systems to adjust their frequency selections based on real-time information from other systems, enhancing stability while maintaining manageable complexity through structured information exchange
2Reliability
If the cognitive system selects backup frequency without coordinating with other cognitive systems, then the frequency selection process is fast, but frequency collision and interference with incumbent system increase
Solution Approach 1:
The patent applies preliminary action by having cognitive systems pre-determine and share their backup frequency lists before actual frequency conflicts occur. Terminals store and exchange these pre-selected backup frequencies, allowing systems to avoid collisions proactively rather than reactively, thus improving collision avoidance while minimizing time loss through advance preparation
Solution Approach 2:
The patent introduces terminals as intermediaries that facilitate coordinated frequency selection between cognitive systems. The terminal acts as a mediator that collects backup frequency information from multiple cognitive systems and relays it back, enabling cooperative frequency collision avoidance without requiring direct complex communication between all cognitive systems, thereby balancing reliability improvement with time efficiency
3Productivity
If the cognitive system uses fixed frequency allocation, then the system operation is simple and stable, but spectrum resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamics by enabling cognitive systems to dynamically select and switch between multiple backup frequencies based on real-time spectrum conditions and incumbent system activity. Instead of fixed allocation, the system maintains ordered lists of backup frequencies and can transition between them, thereby improving spectrum utilization while managing complexity through structured dynamic selection
Solution Approach 2:
The patent applies parameter changes by allowing cognitive systems to modify their operating frequency parameter based on detected spectrum opportunities and threats. The system changes frequency parameters dynamically while maintaining an ordered backup list structure, enabling flexible spectrum utilization without complete freedom of selection, thus balancing productivity improvement with manageable complexity
Data Source
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AI summary
Disclosed are a method and device for determining and assisting in determining a standby frequency point in a cognitive radio system. A first perception system shares the wireless communication spectrum resources of an authorization system, and the method thereof for determining a standby frequency point comprises: through a terminal, a first perception system obtaining a standby frequency point of a second perception system which has overlapping coverage in a target area in an overlapping coverage area; and according to the standby frequency point of the second perception system in the overlapping coverage area, selecting from the wireless communication spectrum resources at least one frequency point as a standby frequency point in the target area. When determining the standby frequency point, the first perception system can refer to the standby frequency point of the second perception system to conduct determination, thereby optimizing the system performance.