Frequency Control Device Subchannelization for IoT Spectrum
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Solution Overview
Problem
The existing frequency management systems are inadequate for flexible secondary usage of narrow-band frequency channels, particularly with the increasing number of Internet of Things (IoT) devices and varied radio access technologies, leading to potential interference issues.
Innovation Solution
A mechanism for subchannelization and provision of available frequency information based on subchannelization is introduced, allowing for flexible assignment of narrow-band frequency channels, reducing interference by determining center frequencies and bandwidths dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency channels are divided into fixed 60 channels of 8 MHz width, then frequency management is simplified, but flexibility for secondary usage by IoT devices and varied radio access technologies is reduced
Solution Approach 1:
The patent segments the traditional 8 MHz frequency channels into multiple narrower sub-channels. This allows secondary systems to allocate frequency resources in smaller units, improving flexibility for IoT devices and varied radio access technologies while maintaining manageable complexity through systematic subchannelization
Solution Approach 2:
The patent introduces dynamic frequency allocation mechanisms where subchannel assignments can be adjusted based on real-time spectrum usage, interference conditions, and service requirements. This enables flexible secondary usage while maintaining overall system coordination to prevent interference
2Object-affected harmful factors
If wide-band frequency channels are used, then fewer channels are needed for management, but interference between different wireless systems increases
Solution Approach 1:
By dividing wide-band channels into narrower sub-channels, the patent reduces the frequency span occupied by each secondary system, thereby minimizing interference with primary systems and other wireless services while maintaining organized channel management structures
Solution Approach 2:
The patent enables different subchannel allocation strategies to be applied in different frequency regions and geographic areas based on local interference conditions, primary system usage patterns, and secondary service requirements, optimizing interference mitigation locally
3Productivity
If fixed frequency assignment is used, then interference suppression is achieved, but frequency usage efficiency decreases due to inability to adapt to changing conditions
Solution Approach 1:
The patent implements dynamic subchannel allocation where frequency assignments can be modified in response to changing spectrum availability, interference conditions, and service demands. This maintains high frequency usage efficiency while incorporating monitoring and control mechanisms to ensure interference suppression reliability
4Productivity
If narrow-band frequency channels are used for secondary usage, then frequency usage efficiency improves, but the mechanism complexity for subchannelization and frequency information provision increases
Solution Approach 1:
The patent develops universal subchannelization mechanisms and frequency information provision protocols that can be applied across different secondary systems, radio access technologies, and deployment scenarios. This standardizes the complexity handling while enabling efficient narrow-band frequency usage
Data Source
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AI summary
Proposed is a mechanism capable of secondary usage of narrow-band frequency channels. A control device includes a control unit configured to perform division processing of dividing a first frequency band indicated by a frequency supervising database as a frequency band that can be used by at least one communication node, into a plurality of second frequency bands, on the basis of capability information of the communication node and information indicating a measurement result by the communication node.