Communication Control Device for Unlicensed Band Spectrum Sharing
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Solution Overview
Problem
The emerging problem of radio resource exhaustion in radio systems, where incumbent radio systems occupy existing radio bands, making it difficult to allocate new radio resources. Cognitive radio technology is expected to improve radio wave utilization efficiency by utilizing unused radio spectrum, but managing radio resources across different standards in unlicensed bands poses challenges.
Innovation Solution
A communication control device that acquires information about multiple communication devices, determines a medium reservation scheme for them to share a predetermined channel, and notifies the devices of the scheme. This device employs asynchronous or synchronous channel access schemes based on the capabilities of the communication devices to ensure efficient medium reservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cognitive radio technology is used to utilize unused radio spectrum, then radio wave utilization efficiency is improved, but conflict between different types of systems occurs when multiple standards operate simultaneously in unlicensed bands
Solution Approach 1:
The patent introduces a communication control device as an intermediary that manages medium reservation for multiple communication devices operating in unlicensed bands. This mediator coordinates channel access by determining reservation periods and notifying devices of their allocated time slots, preventing conflicts between different standards while maintaining high spectrum utilization through cognitive radio techniques
2Adaptability or versatility
If traditional Listen Before Talk methods are used for channel access, then system compatibility is maintained, but spectrum use efficiency is limited
Solution Approach 1:
The patent implements preliminary action by having the communication control device determine and notify medium reservation schemes in advance before actual channel access. Communication devices receive notification of their reserved periods and systematically access channels during allocated time slots rather than continuously performing listen-before-talk, thereby improving spectrum efficiency while maintaining compatibility through structured coordination
Data Source
AI summary
A communication control device includes: an acquisition unit that acquires information regarding one or more communication devices; a determination unit that determines a medium reservation scheme for the one or more communication devices to share a predetermined channel based on the acquired information; and a notification unit that notifies the communication device of the determined medium reservation scheme.