Wi-Fi Indoor Positioning Using Motion-Based Virtual Reference Points
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Solution Overview
Problem
Existing Wi-Fi-based indoor positioning technologies require multiple Wi-Fi hotspot apparatuses as reference points, are labor and time-consuming, and suffer from environmental interference, leading to poor positioning precision.
Innovation Solution
A method using a single electronic device to determine a target device's location by moving along a predetermined track, obtaining Wi-Fi feature information and motion data, without relying on offline fingerprint databases, to form virtual reference points and improve precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple Wi-Fi hotspot apparatuses are used as reference points, then positioning coverage is improved, but device complexity and deployment cost increase
Solution Approach 1:
The target device itself performs positioning measurements by moving along a predetermined track and collecting Wi-Fi signal data. The device uses its own motion information (accelerometer, gyroscope, compass) to determine position without requiring external reference points, making the system self-sufficient and eliminating the need for multiple Wi-Fi hotspot apparatuses
Solution Approach 2:
Instead of having multiple fixed reference points emit signals for the target device to detect, the invention inverts the approach by having the target device actively move and collect signal data, then use its own motion trajectory to calculate position. This reverses the traditional active-passive relationship in positioning systems
2Measurement precision
If fingerprint-based positioning is used, then positioning precision is improved, but time and labor consumption increase
Solution Approach 1:
The system performs preliminary action by having the target device move along a predetermined track to collect Wi-Fi signal data and build a positioning model in advance. This pre-collected data is then used for rapid positioning without requiring repeated offline fingerprint database construction, significantly reducing time and labor consumption for subsequent positioning operations
Solution Approach 2:
The invention transitions from static fingerprint databases requiring extensive offline collection to a dynamic positioning approach where the device actively moves along a predetermined track to collect real-time signal data. This dynamic collection method adapts to the specific environment and reduces the need for extensive pre-collection of fingerprint data across multiple locations
3Ease of operation
If traditional Wi-Fi positioning methods are used, then implementation is simplified, but positioning precision deteriorates due to environmental interference
Solution Approach 1:
The invention introduces motion information (accelerometer, gyroscope, compass data) as an intermediary element that mediates between Wi-Fi signal data and position calculation. By combining signal strength data with the device's motion trajectory and orientation, the system compensates for environmental interference and improves positioning precision while maintaining implementation simplicity
Solution Approach 2:
The positioning solution combines multiple data sources (Wi-Fi signal strength, accelerometer data, gyroscope data, compass data) into a composite positioning model. This multi-source fusion approach is analogous to composite materials, where combining different types of data improves overall positioning precision while maintaining the simplicity of a unified implementation framework
Data Source
AI summary
An electronic device receives a first input operation performed by a user; determines a to-be-positioned target device and a predetermined moving track in response to the first input operation; and obtains WI-FI feature information of the target device or a WI-FI hotspot apparatus with a known geographical location and motion information of a first electronic device in a process in which the first electronic device moves along the predetermined moving track to determine and display location information of the target device such that the target device can be positioned using one electronic device, there is no need to be a plurality of known reference points, and an offline fingerprint database is not relied on.