Base Station Selection for Ionospheric Reflection Reliability
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Solution Overview
Problem
Communication reliability using ionospheric reflection techniques is compromised due to varying ionosphere conditions and inadequate selection of transmission sites, especially for mobile communication terminals with insufficient communication logs.
Innovation Solution
A base station determination program that identifies suitable base stations by matching the day-night distinction at the communication terminal's position with that of available base stations, and prioritizes those with communication logs and suitable radio wave characteristics for reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base station selection is performed without considering day-night condition matching, then the selection process is simple, but communication reliability deteriorates due to ionosphere condition variations
Solution Approach 1:
The patent applies parameter changes by considering the day-night condition as a critical parameter for base station selection. The system changes the selection criteria from simple proximity-based selection to a more complex evaluation that incorporates temporal parameters (day/night conditions) and spatial parameters (base station positions, communication terminal positions, and calculated distances). This parameter expansion resolves the contradiction by improving communication reliability through more comprehensive selection criteria while accepting increased selection complexity as a necessary trade-off.
Solution Approach 2:
The patent implements preliminary action by pre-calculating and storing day-night condition information for multiple base stations before actual communication occurs. The system performs preliminary evaluation of base station candidates by comparing their day-night conditions with those of the communication terminal, and pre-determines suitable base stations based on predicted ionosphere conditions. This preliminary processing enables more reliable base station selection without requiring complex real-time calculations during actual communication.
2Area of stationary object
If base stations without communication logs are included in candidates, then the coverage area is expanded, but communication quality deteriorates due to insufficient historical data
Solution Approach 1:
The patent applies local quality by differentiating the treatment of base stations based on their individual characteristics (having communication logs vs. not having communication logs). The system does not uniformly treat all base stations equally but rather applies selective criteria: base stations with communication logs are evaluated based on their historical performance and ionosphere conditions, while base stations without logs are evaluated based on other factors such as geographical proximity and current day-night conditions. This differentiated approach resolves the contradiction by maintaining expanded coverage while ensuring communication quality through selective base station evaluation.
3Loss of energy
If ionospheric reflection is used for long-distance communication, then communication cost is reduced, but communication reliability deteriorates due to varying ionosphere conditions
Solution Approach 1:
The patent implements feedback by continuously monitoring actual ionosphere conditions and using this information to adjust base station selection and communication parameters. The system incorporates feedback from communication logs, historical data, and real-time ionosphere measurements to refine future base station selections. This feedback mechanism enables the system to adapt to varying ionosphere conditions while maintaining the cost-effectiveness of ionospheric reflection for long-distance communication.
Solution Approach 2:
The patent applies dynamics by making the base station selection process adaptive and flexible rather than static. The system dynamically adjusts selection criteria based on changing ionosphere conditions, time of day, and historical performance data. This dynamic approach allows the system to maintain communication reliability despite varying ionospheric conditions, while continuing to use the cost-effective ionospheric reflection technique for long-distance communication.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures highly reliable communication by selecting base stations with matching day-night conditions and adequate communication logs, reducing the risk of communication failure and improving transmission quality.
Implementation Method 1
a communication technique utilizing the reflection of radio waves at the ionosphere is used
Data Source
AI summary
A non-transitory computer-readable recording medium having stored therein a base station determination program for causing a computer to execute a process includes: acquiring position information on a communication terminal; assigning, based on position information on each of a plurality of base stations stored in advance in a storage and the acquired position information on the communication terminal, one or more base stations other than a base station that includes a point at which a radio wave characteristic based on longitude information changes in a time slot during which communication is to be performed, and which is provided between a position of the base station and a position of the communication terminal, as one or more base station candidates from among the plurality of base stations; and determining a base station that is to communicate with the communication terminal from among the one or more base station candidates.