Adaptive Frequency Regulation for Indoor Coverage Networks
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Solution Overview
Problem
Existing methods for indoor cellular network frequency planning are inadequate for irregular cell layouts and unpredictable radio propagation characteristics, leading to significant inter-cell interference and inefficient frequency resource utilization.
Innovation Solution
An adaptive frequency regulation method that detects neighboring cells, generates relationship information, and divides available frequency bands into a minimum number of sub-bands to minimize interference, using a semi-static frequency planning scheme that adjusts based on traffic loads and cell relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional outdoor frequency planning methods (1/3 partition pattern) are used for indoor coverage, then frequency resource utilization is simplified, but inter-cell interference increases significantly due to irregular cell layouts and unpredictable radio propagation characteristics
Solution Approach 1:
The system dynamically changes frequency allocation parameters based on detected cell relationships and traffic conditions. Instead of using fixed outdoor frequency patterns, the system adjusts frequency assignments adaptively to match indoor propagation characteristics and cell layouts, thereby reducing inter-cell interference while maintaining frequency resource utilization
Solution Approach 2:
The system implements feedback mechanisms where frequency planning decisions are continuously refined based on detected neighboring cell relationships and interference measurements. This allows the network to learn from actual propagation conditions and adjust frequency allocations to minimize interference in irregular indoor environments
2Object-affected harmful factors
If manual frequency planning is performed for each indoor cell, then inter-cell interference can be optimized, but deployment time and operational complexity increase significantly
Solution Approach 1:
The system enables self-service frequency planning where base stations automatically detect their neighboring cells and determine optimal frequency allocations without manual intervention. The network autonomously adapts frequency plans based on detected cell relationships and traffic conditions, eliminating the need for time-consuming manual planning while maintaining optimized interference levels
Solution Approach 2:
The system performs preliminary frequency planning actions automatically during network deployment and operation. By pre-configuring adaptive frequency allocation mechanisms and enabling automatic neighboring cell detection, the system prepares the network to handle interference optimization without requiring manual planning at deployment time
3Productivity
If high density network deployment is implemented to ensure indoor coverage, then coverage and throughput are improved, but inter-cell interference increases and limits performance
Solution Approach 1:
The system segments the frequency spectrum into multiple sub-bands and dynamically assigns different sub-bands to neighboring cells based on detected cell relationships. This frequency segmentation allows high density deployment by providing orthogonal or quasi-orthogonal frequency resources to adjacent cells, thereby maintaining high throughput while reducing inter-cell interference through frequency division
Solution Approach 2:
The system applies local quality optimization by assigning different frequency allocation strategies to different cells based on their specific neighboring relationships and traffic conditions. Each cell receives customized frequency resources tailored to its local interference environment, enabling high density deployment with optimized performance for each location
Data Source
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AI summary
The present disclosure publishes a method and a system of adaptive regulating for indoor network coverage. The method includes detecting the neighboring cells of every cell, obtaining a list of the neighboring cells, and sending a list of the neighboring cells to a network managing center, the network managing center configured to generate an correlating information among the cells; dividing a first bandwidth into a plurality of sub-bandwidths and obtaining a minimum number of the sub-bandwidth according to the correlating information among the cells; assigning the corresponding sub-bandwidths to each of the cells.