Cognitive Radio Spectrum Coordinator for Fine Resource Allocation
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Solution Overview
Problem
Current frequency spectrum resource management technologies in wireless communication systems only provide rough allocation for secondary users, failing to manage transmission waveforms and time-domain resources efficiently, leading to potential interference with primary users and high-priority secondary users.
Innovation Solution
A resource management device and method that dynamically allocates fine frequency spectrum resources to secondary systems based on overall spectrum sensing, state of the secondary system, and interference suppression requirements, using a cognitive radio apparatus to avoid harmful interference and improve spectrum utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fine frequency spectrum resource allocation (including transmission waveform, multi-access mode, modulation mode, time-domain resources) is implemented for secondary users, then frequency spectrum utilization ratio is improved, but device complexity and management overhead increase
Solution Approach 1:
A frequency spectrum coordinator is introduced as an intermediary device to manage fine frequency spectrum resource allocation. The coordinator receives spectrum sensing results from multiple cognitive radio apparatus, determines appropriate transmission waveforms and time-domain resources, and notifies the apparatus of allocated resources. This centralizes the complex computation and decision-making, reducing individual apparatus complexity while enabling fine-grained spectrum utilization through coordinated management of multiple users across different frequency bands and time slots
Solution Approach 2:
The frequency spectrum management is segmented into distinct functional components: spectrum sensing performed by individual cognitive radio apparatus, central coordination and resource allocation by the frequency spectrum coordinator, and notification of allocated resources back to users. This segmentation allows the complex task of fine resource allocation to be distributed appropriately, with the coordinator handling waveform selection and resource assignment while individual apparatus focus on sensing and transmission
2Reliability
If fine frequency spectrum resource allocation is implemented to avoid interference with primary users, then reliability of primary user communication is improved, but management overhead increases
Solution Approach 1:
The frequency spectrum coordinator performs preliminary actions by proactively sensing the frequency spectrum to detect primary user signals before allocating resources to secondary users. When primary user signals are detected, the coordinator pre-determines which frequency bands and time slots should be reserved, and notifies cognitive radio apparatus in advance of available resources. This preliminary detection and reservation mechanism ensures primary user communication reliability is maintained while reducing management overhead by avoiding real-time interference detection and resolution
Solution Approach 2:
The system implements feedback mechanisms where cognitive radio apparatus report their transmission status and received interference levels back to the frequency spectrum coordinator. The coordinator uses this feedback to adjust future resource allocations, optimizing the balance between secondary user utilization and primary user protection. This continuous feedback loop enables adaptive management that reduces overhead by learning from past allocations and adjusting predictions for future resource distribution
Data Source
AI summary
A resource management device, a resource management method, and a device and method in a communication system. The resource management device is used for managing opportunistic utilization of frequency spectrum resources of a primary system by a secondary system in the communication system, and includes: a reception unit configured to receive device information and a resource request of a target secondary system device among one or more secondary system devices in the secondary system; an available resource acquisition unit configured to acquire, in response to the resource request, available resource information of the target secondary system device on the basis of the device information of the target secondary system device, wherein the resource information includes indication information related to transmission waveform used for the target secondary system device; and a notification unit configured to notify the target secondary system device of the acquired resource information.