Environment Estimation Device Using Position Timing and Base Station Data
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Solution Overview
Problem
Existing indoor/outdoor determination programs for mobile terminals rely on elevation angle and satellite azimuth information from GPS satellites, making it difficult to accurately determine the environment of a mobile terminal without complex processes.
Innovation Solution
An environment estimation device that correlates radio equipment information with positioning timing and position data to estimate the environment of a mobile terminal, using a storage unit, acquisition unit, and estimation unit within a communication system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If elevation angle information and satellite azimuth angle information from GPS satellites are used for indoor/outdoor determination, then environment determination accuracy is improved, but process complexity increases
Solution Approach 1:
The patent introduces a determination table as an intermediary data structure that pre-stores the relationship between base station environments and mobile terminal environments. This table acts as a mediator between the complex GPS calculation process and the simple lookup operation, enabling accurate environment determination without requiring real-time elevation angle and azimuth angle calculations. The determination table pre-computes and stores mapping relationships, transforming a complex real-time calculation problem into a simple data retrieval problem.
Solution Approach 2:
The patent performs preliminary computation by pre-calculating and storing environment determination data in a determination table before actual use. Instead of calculating elevation angles and azimuth angles in real-time during environment determination, the system pre-computes these values and stores them in the determination table along with corresponding environment labels. This preliminary action eliminates the need for complex real-time calculations, reducing both computational complexity and processing time while maintaining determination accuracy.
2Measurement precision
If complicated processes based on elevation angle and satellite azimuth angle information are performed, then environment determination accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The patent creates a simplified copy of the environment determination process by storing pre-computed results in a determination table. Instead of requiring users or systems to perform complex elevation angle and azimuth angle calculations, the system creates a lookup table that copies the essential determination logic in advance. This copying approach allows environment determination to be performed through simple table lookups, dramatically improving ease of operation while preserving determination accuracy.
3Reliability
If GPS satellite-based determination methods are used, then environment determination capability is achieved, but device complexity increases
Solution Approach 1:
The patent extracts the complex calculation logic from the environment determination process and separates it into a pre-computed determination table. By taking out the complex elevation angle and azimuth angle calculations from the real-time determination process and storing them in advance in the determination table, the system maintains environment determination capability while significantly reducing the complexity of the actual determination operation. The complex logic is extracted and固化 (solidified) in the table structure.
Data Source
AI summary
An environment estimation device 1 includes: an information storage unit 11 configured to store base station information in which a serving timing at which a mobile terminal 2 is served in a radio communication range of a base station 3 and environment information indicating an environment of the base station 3 are correlated; an information acquiring unit 10 configured to acquire position information including position data of the mobile terminal 2 acquired by positioning and a positioning timing; and an estimation unit 13 configured to estimate, based on the positioning timing included in the position information of the mobile terminal 2 acquired by the information acquiring unit 10 and the base station information stored in the information storage unit 11, an environment of the mobile terminal 2 at a position indicated by the position data included in the position information.