Beam Power Control for Secondary Wireless Systems
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Solution Overview
Problem
Current frequency management systems do not adequately address interference issues when a secondary wireless system performs beam forming, as they apply uniform maximum permissible transmission power regardless of beam direction, leading to inefficient frequency use and potential interference with primary systems.
Innovation Solution
A mechanism for secondary frequency use is introduced, where a frequency administration database determines permitted beam information based on geolocation and beam pattern data, allowing flexible beam management by setting different transmission powers for beams directed towards or away from primary systems, thereby optimizing frequency use and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If uniform maximum permissible transmission power is applied regardless of beam direction, then interference protection for primary systems is simplified, but frequency use efficiency deteriorates
Solution Approach 1:
The patent applies different transmission power levels to different beam directions based on their interference impact. Beams directed toward primary systems use reduced power while beams away from primary systems use maximum power, creating localized quality variations in power allocation rather than uniform power distribution
Solution Approach 2:
The patent dynamically changes the transmission power parameter based on beam direction and interference assessment. The control device adjusts power levels according to the specific beam pattern and directional gain, transforming the fixed power parameter into a variable that adapts to different transmission scenarios
2Productivity
If beam forming is performed by secondary system, then transmission efficiency to distant areas is improved, but interference management complexity increases
Solution Approach 1:
The patent introduces a control device as an intermediary between the secondary system's beam forming function and the primary system's interference protection requirements. This control device assesses interference impact and determines appropriate power levels, mediating the conflict between transmission efficiency and interference management
Solution Approach 2:
The patent segments the beam forming process into multiple controllable components: beam direction assessment, interference impact evaluation, and differential power allocation. Each segment can be independently controlled and optimized, reducing overall management complexity
Data Source
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AI summary
[Overview] [Problem to be Solved] To propose a mechanism for secondary use of frequency suitable for a case where a secondary system performs beam forming. [Solution] A control device including: a first acquiring section; a second acquiring section; a determining section; and a notifying section. The first acquiring section acquires first geolocation information of a datum point for interference calculation of a first wireless operation and calculates or acquires an interference acceptable amount at the datum point. The second acquiring section acquires second geolocation information, first antenna information, and first beam pattern information of a wireless device belonging to a second wireless operation that shares a portion or all of a frequency assigned to the first wireless operation. The first beam pattern information indicates a beam pattern usable by the wireless device. The determining section determines information regarding a beam permitted to the wireless device on the basis of these acquired pieces of information. The notifying section notifies the wireless device or a device related to the wireless device of the information regarding the beam permitted to the wireless device.