Wi-Fi Radio Map Building Using Passive Terminal Address Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for building Wi-Fi radio maps, such as those using GPS and user-participated data collection, face challenges in accuracy and cost, especially when collecting Wi-Fi fingerprints from indoor APs, and require active user participation or long deployment times for appliance-based solutions.
Innovation Solution
A method that utilizes address data from mobile terminals to estimate Wi-Fi fingerprint collection positions, allowing for the creation of a Wi-Fi radio map without user input, by embedding a Wi-Fi fingerprint collection module in mobile devices and using a user address database to convert addresses to coordinates, thereby building a reliable Wi-Fi radio map.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If GPS signal is used for position locating, then satellite coverage is wide, but accuracy is low especially in interior locations
Solution Approach 1:
The invention segments the position locating system into two complementary parts: GPS for outdoor/macro location and Wi-Fi fingerprinting for indoor/micro location. This allows the system to leverage the wide coverage of GPS while achieving high accuracy through Wi-Fi based fingerprint matching, especially in interior locations where GPS fails.
2Reliability
If Skyhook's WPS method is used to build Wi-Fi signal map, then AP position data can be obtained, but cost and time are high and accuracy is limited
Solution Approach 1:
The invention transforms the map building process from an active, manual data collection method to a passive, automated system. Mobile terminals automatically collect Wi-Fi fingerprints and transmit them to the server without requiring user action or manual intervention. This self-service approach dramatically reduces the time and cost while maintaining data quality through automated filtering and validation algorithms.
3Loss of information
If user participation is required for location data input, then location data can be obtained, but user responsiveness is low and symbolic data is obtained
Solution Approach 1:
The system automatically collects location information from mobile terminals without requiring user input. The terminal device autonomously captures Wi-Fi fingerprints, determines location through fingerprint matching, and transmits data to the server. This eliminates the need for users to manually input location data, achieving both complete location information and maximum ease of operation.
4Productivity
If mobile terminals are used for Wi-Fi fingerprint collection, then collection effectiveness is maximized, but position information is not automatically obtained
Solution Approach 1:
The invention introduces a Wi-Fi fingerprint database as an intermediary that links mobile terminals to location information. When a terminal collects a Wi-Fi fingerprint, the system queries the database to retrieve corresponding location data, thereby automatically obtaining position information without requiring direct user input or additional sensors.
Data Source
AI summary
The present invention is related to method and device for building Wi-Fi radio map. Especially, it is related to device and method for building Wi-Fi radio map that is used to position locating service that utilizes Wi-Fi fingerprints that many, unspecified mobile terminals collect and provide. Specifically, the present invention provides, as methods for estimating position data for AP (200) using Wi-Fi fingerprints collected by mobile terminals (100), 1) method for estimating position data for AP (200) by linking Wi-Fi fingerprints and time data for collecting Wi-Fi signal, or 2) method for estimating position data for AP (200) through user address data comparison between Wi-Fi fingerprints without linking signal collection time data to Wi-Fi fingerprints. Accordingly, it has effects of epoch-making economic feasibility compared to prior art that requires huge cost in collecting Wi-Fi fingerprint like war driving.