Mini Base Station Frequency Selection to Avoid Cellular Interference
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Solution Overview
Problem
The existing solutions for addressing communication barriers in shadow areas, such as those caused by barriers like buildings, are hindered by high installation costs and interference issues between cellular base stations and mini base stations, which are difficult and expensive to implement.
Innovation Solution
A mini base station with a frequency recognition unit and an operation frequency determination unit that identifies and sets an operation frequency band based on the interference generated with a cellular base station, reducing interference and enabling high-speed, high-quality data transmission while transmitting advertisement messages to terminals to facilitate communication frequency band setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a mini base station is installed to provide communication coverage in shadow areas, then communication coverage is improved, but interference with cellular base station increases
Solution Approach 1:
The mini base station changes its operating frequency parameter to avoid interference with the cellular base station. The frequency determination unit selects a frequency band that is different from the cellular base station's frequency band, thereby reducing harmful interference while maintaining communication coverage in shadow areas.
2Ease of operation
If the mini base station operates in an area other than the shadow area, then communication coverage is provided, but interference problem is generated
Solution Approach 1:
The system dynamically adjusts the frequency parameter based on the operating environment. In non-shadow areas where cellular base station signals are strong, the mini base station selects a different frequency band to avoid interference, while still providing communication service where needed.
3Ease of manufacture
If frequency band is selected without considering cellular base station interference, then setup is simple, but communication quality deteriorates
Solution Approach 1:
The frequency determination unit performs preliminary frequency band selection by recognizing the cellular base station's frequency band and pre-determining an appropriate frequency for the mini base station before communication begins. This preliminary action ensures communication quality is maintained from the start without requiring complex real-time adjustments.
4Ease of operation
If advertisement message is transmitted using uplink time slot, then transmission is straightforward, but communication efficiency is reduced
Solution Approach 1:
The system uses periodic downlink time slots to transmit advertisement messages from the mini base station to terminals. This periodic action during downlink slots improves communication efficiency by utilizing available transmission opportunities without interfering with uplink communications, while still ensuring terminals receive the frequency band information.
Data Source
AI summary
A mini base station connectable with the Internet including a frequency recognition unit to recognize a frequency band of an external signal transmitted from a cellular base station; and an operation frequency determination unit to determine an operation frequency band according to interference generated with the cellular base station based on the recognized frequency band of the external signal.