Indoor Navigation Using Wireless and Acoustic Signal Strength
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Solution Overview
Problem
Existing indoor positioning and navigation technologies based on wireless communication have low accuracy and poor anti-interference performance, making it difficult for users to quickly find targets in large indoor spaces like shopping malls.
Innovation Solution
A navigation system comprising multiple signal sources that transmit wireless signals with position and power information, allowing mobile terminals to determine their position and route to a target signal source using signal strength and electronic maps, and optionally utilizing additional signals for improved accuracy and navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless communication technology is used for indoor positioning and navigation, then the system can be implemented in large indoor spaces like shopping malls and airports, but the positioning accuracy and anti-interference performance are low
Solution Approach 1:
The patent divides the indoor space into multiple regions with signal sources distributed throughout. Each signal source transmits independent signals, and the mobile terminal determines position by comparing signals from multiple sources. This segmentation approach improves positioning accuracy and anti-interference performance by not relying on a single wireless communication system.
Solution Approach 2:
The patent introduces acoustic signals as an intermediary medium for positioning. Acoustic signal sources transmit sound waves that can be detected by the mobile terminal's microphone. This intermediary approach provides a new channel for position determination that is less susceptible to wireless interference, thereby improving reliability and accuracy.
2Measurement precision
If multiple signal sources are deployed to improve positioning accuracy, then the navigation precision increases, but the system complexity and cost increase
Solution Approach 1:
The patent designs signal sources that can serve multiple functions: they can emit both wireless communication signals and acoustic signals, and can provide both positioning information and navigation guidance. This multi-functionality reduces the need for separate systems, thereby limiting the increase in system complexity while maintaining improved precision.
Solution Approach 2:
The mobile terminal itself performs the position determination and route planning functions using the received signals. The terminal processes the signal strength comparisons and calculates its position autonomously. This self-service approach reduces the complexity of the overall system by shifting processing responsibilities to the terminal rather than requiring a complex centralized system.
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
Enables accurate and efficient navigation within indoor environments by determining the position of mobile terminals and guiding them to target locations, such as electronic shelf labels, using signal strength and electronic maps, thereby improving user experience and reducing navigation errors.
Implementation Method 1
determine a distance Ri between the first signal source Bi and the mobile terminal according to a signal strength of the first wireless signal of the first signal source Bi which is received
Data Source
AI summary
The navigation system includes a plurality of first signal sources and a mobile terminal, each of the plurality of first signal sources is configured to transmit a first wireless signal; the mobile terminal is configured to receive the first wireless signal, determine a position of the mobile terminal according to the received first wireless signal, and determine a route from the position of the mobile terminal to a target first signal source to perform navigation, according to an electronic map, the received first wireless signal, the position of the mobile terminal, and the target first signal source.