HAPS Area Control Through Segmented Antenna Parameter Tuning
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Solution Overview
Problem
Existing methods for optimizing antenna parameters in a service area formed by a communication relay apparatus face exponential complexity and increased calculation time due to non-uniform user equipment distribution, particularly when multiple cells are involved.
Innovation Solution
A communication relay apparatus and remote control apparatus divide the service area into subareas and optimize antenna parameters for each subarea using position estimation and genetic algorithms, reducing the number of parameters to be optimized and minimizing the calculation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optimization is performed for each cell to adapt to non-uniform UE distribution, then communication quality is improved, but calculation complexity increases exponentially and optimization time increases
Solution Approach 1:
The service area is divided into multiple subareas, and optimization is performed separately for each subarea rather than for the entire service area or each individual cell. This segmentation reduces the calculation complexity from exponential to polynomial while maintaining adaptability to non-uniform UE distribution through localized optimization.
2Reliability
If optimization is performed for each cell to adapt to non-uniform UE distribution, then communication quality is improved, but optimization time increases
Solution Approach 1:
The service area is divided into multiple subareas, and optimization is performed separately for each subarea rather than for the entire service area or each individual cell. This segmentation reduces the calculation complexity from exponential to polynomial while maintaining adaptability to non-uniform UE distribution through localized optimization.
Data Source
AI summary
It is to provide an aerial-floating type communication relay apparatus (HAPS) that can perform a dynamic area control capable of adapting to a change of distribution of terminal apparatuses in a service area configured with plural cells formed toward the ground, and that can suppress an increase in time required for area optimization. The aerial-staying type communication relay apparatus (HAPS) estimates positions of plural terminal apparatuses located in a service area, divides the service area into plural (M) subareas including plural cells, optimizes plural (L) kinds of antenna parameters of antenna for service link based on estimation results of the positions of plural terminal apparatuses for each of the subareas, and applies, to the antenna for service link, optimum values of the plural (L) kinds of antenna parameters after the optimization for each of the subareas is completed for all of the plural (M) subareas.