Cognitive Radio Frequency Band Allocation for Detection Efficiency
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Solution Overview
Problem
Existing cognitive radio systems face inefficiencies in detecting the status of frequency band usage by primary systems due to environmental influences and individual detection accuracy issues, leading to resource-intensive and inaccurate spectrum sensing across all channels.
Innovation Solution
A radio communication system with a control section that allocates frequency bands to cognitive radio apparatuses within a group, allowing a master node to specify detection channels for slave nodes, collect and analyze detection results, and reorganize subgroups and frequency bands to enhance detection efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual cognitive radio apparatuses perform spectrum sensing on all channels independently, then detection coverage is comprehensive, but detection accuracy deteriorates due to environmental influences and resource consumption increases
Solution Approach 1:
The patent divides the frequency band into multiple channels and assigns different channels to different cognitive radio apparatuses for detection. Instead of each apparatus sensing all channels independently, the system segments the detection task across multiple devices, reducing individual processing load while maintaining comprehensive coverage through centralized result aggregation.
Solution Approach 2:
The patent merges detection results from multiple cognitive radio apparatuses at a central controller. By combining observations from multiple devices sensing different channels, the system achieves comprehensive frequency band monitoring with reduced individual resource consumption and improved overall detection reliability.
2Productivity
If cognitive radio apparatuses reuse frequency bands quickly, then frequency band utilization efficiency improves, but interference with primary systems increases
Solution Approach 1:
The patent implements a feedback mechanism where cognitive radio apparatuses continuously report detection results to a central controller, which determines whether frequency bands are available for secondary use. This feedback loop ensures that primary system usage is detected and prevents interference while allowing efficient reuse of unused bands through centralized coordination.
Solution Approach 2:
The patent performs preliminary spectrum sensing and analysis before allowing cognitive radio apparatuses to reuse frequency bands. The central controller evaluates detection results in advance and only permits band reuse when primary system absence is confirmed, preventing interference while enabling efficient utilization.
Data Source
AI summary
Provided is a radio communication system including a plurality of cognitive radio apparatuses each including at least: a transmission/reception element; and a detection element for detecting a radio wave transmitted from a radio apparatus of another radio communication system, in which the radio communication system further includes a control section for determining a frequency band on which each cognitive radio apparatus of a radio apparatus group including the plurality of cognitive radio apparatuses is to detect the radio wave.