Dynamic Spectrum Allocation in Cognitive Radio Systems
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Solution Overview
Problem
Current static spectrum allocation methods in Cognitive Radio (CR) systems are inefficient, leading to suboptimal spectrum utilization and requiring lengthy network re-planning, which cannot adapt to dynamic spectrum usage in CR systems, resulting in degraded system performance due to errors from static information.
Innovation Solution
A dynamic spectrum allocation method where a centralized node allocates spectra based on communication quality measurement information, periodically re-allocating resources to prevent long-term performance degradation and improve spectrum utilization by adjusting spectrum allocation dynamically according to changing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If static spectrum allocation methods are used in CR systems, then network planning stability is maintained, but spectrum utilization efficiency deteriorates due to inability to adapt to dynamic spectrum usage
Solution Approach 1:
The patent implements dynamic spectrum allocation by periodically re-allocating spectrum resources based on real-time communication quality measurement information. The centralized node collects measurement data from communication nodes and dynamically adjusts spectrum allocation decisions, transforming the static spectrum allocation mechanism into a dynamic one that adapts to changing spectrum usage conditions while maintaining network stability.
2Ease of manufacture
If static spectrum allocation is implemented, then implementation simplicity is maintained, but system performance deteriorates due to errors from static information
Solution Approach 1:
The patent establishes a feedback mechanism where communication nodes continuously measure communication quality (throughput, error rate, interference) and report this information to the centralized node. The centralized node uses this feedback to periodically re-evaluate and re-allocate spectrum resources, ensuring that spectrum allocation decisions are based on current system conditions rather than static information, thereby improving system performance reliability.
3Productivity
If dynamic spectrum re-allocation is performed periodically, then spectrum utilization is improved, but system complexity increases
Solution Approach 1:
The patent enables communication nodes to autonomously measure their own communication quality metrics (throughput, error rate, interference levels) and report this information to the centralized node. This self-service approach allows the system to gather necessary measurement data without requiring complex centralized monitoring infrastructure, thereby reducing overall system complexity while still enabling dynamic spectrum re-allocation to improve spectrum utilization.
Data Source
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AI summary
The present disclosure provides a dynamic spectrum allocation method and a dynamic spectrum allocation device. In the method, a centralized node performs spectrum allocation and transmits a spectrum allocation result to each communication node, so that the communication node operates at a corresponding spectrum resource in accordance with the spectrum allocation result and performs statistics of communication quality measurement information. The centralized node receives the communication quality measurement information reported by the communication node, and determines whether or not it is required to trigger the spectrum re-allocation for the communication node in accordance with the communication quality measurement information about the communication node. When it is required to trigger the spectrum re-allocation, the centralized node re-allocates the spectrum for the communication node.