Communication Control Device for Spectrum Sharing in CBRS
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Solution Overview
Problem
The occurrence of errors in detecting the frequency band used by primary communication services in CBRS bands limits the availability of frequency bands for secondary use, making it challenging to allocate new radio resources effectively.
Innovation Solution
A communication control device that acquires information on channels occupied by primary communication services, specifies alternative frequency bands by handling channel occupancy only in part of the frequency band, and allocates these specified bands to secondary use communication devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frequency band is allocated to primary communication service based on detection results, then the primary service can use the detected band, but detection errors limit the availability of frequency bands for secondary use
Solution Approach 1:
The frequency band is divided into multiple channels, and the patent segments the channel occupancy handling into two parts: (1) channels where primary service occupancy is certain (based on detection results), and (2) channels where occupancy is uncertain or undetected. This segmentation allows secondary services to be allocated in the uncertain/undetected channels while protecting the certain channels, thus resolving the contradiction between detection reliability and spectrum utilization.
Solution Approach 2:
The patent applies partial action by not requiring full protection of all detected channels for primary services. Instead, it protects only the certain channels (first channel) while allowing secondary services in uncertain channels (second channel). This partial protection approach prevents over-restriction of spectrum availability due to detection errors, thereby improving overall spectrum utilization efficiency.
2Reliability
If the detected frequency band is fully protected for primary service, then detection errors are avoided, but the available frequency bands for secondary use are reduced
Solution Approach 1:
The patent segments the frequency band into two distinct parts: a first channel where primary service occupancy is certain and is protected, and a second channel where occupancy is uncertain or undetected and can be allocated to secondary services. This segmentation allows the system to protect only the necessary portion (certain channels) while making available the uncertain channels for secondary use, thus resolving the contradiction between protection reliability and quantity of available bands.
Solution Approach 2:
The patent applies different quality levels of protection to different parts of the frequency band. The first channel (certain occupancy) receives full protection with restricted secondary access, while the second channel (uncertain occupancy) receives partial or no protection allowing secondary service allocation. This local differentiation of protection quality optimizes both primary service reliability and overall spectrum availability.
Data Source
AI summary
Provided is a communication control device that includes: an acquisition unit that acquires first information regarding a channel occupied by a primary communication service among a plurality of channels allocated to the primary communication service. The communication control device further includes a specifying unit that handles the channel occupied by the primary communication service only in a part of a frequency band among the frequency bands corresponding to the channels by specifying another frequency band, that is, a frequency band other than the part of the frequency band. The communication control device further includes a control unit that allocates the specified other frequency band to one or more secondary use communication devices that provide a secondary communication service different from the primary communication service.