Wireless Device Counting for Low-Cost Indoor Position Authentication
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Solution Overview
Problem
Existing technologies are unable to authenticate indoor positions effectively and incur high equipment costs for systems designed for this purpose.
Innovation Solution
An indoor position authentication method utilizing existing wireless communication systems, such as wireless LAN, to authenticate positions by counting the number of wireless devices that can communicate with each other, designating them as 'masters', and using this information to determine the user's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated signal transmitters and receivers are arranged in various places for indoor position authentication, then position authentication capability is achieved, but equipment cost increases significantly
Solution Approach 1:
The patent applies universality by enabling existing wireless devices (smartphones, tablets, laptops) to serve dual purposes: their original communication functions plus indoor position authentication. The terminal device uses its existing wireless communication capabilities to both communicate normally and perform position authentication by detecting wireless signals from multiple devices, eliminating the need for dedicated authentication hardware.
Solution Approach 2:
The patent implements self-service by allowing the terminal device to autonomously perform position authentication using its own wireless communication capabilities. The device automatically detects wireless signals from surrounding devices, calculates positions based on signal strengths, and determines its location without requiring external dedicated authentication equipment or manual intervention.
2Device complexity
If existing wireless communication systems are used for indoor position authentication, then equipment cost is reduced, but authentication reliability may be affected
Solution Approach 1:
The patent applies merging by combining multiple wireless signal detections into a unified position authentication process. The terminal device detects wireless signals from multiple different wireless devices, integrates the position information from each detection, and synthesizes a reliable location determination. This combination of multiple independent detections compensates for the lack of dedicated hardware, maintaining reliability while using existing systems.
Solution Approach 2:
The patent implements feedback by using signal strength measurements from detected wireless devices to continuously refine position calculations. The terminal device measures the strength of wireless signals, uses this feedback to determine distances to detected devices, and iteratively calculates its position based on the geometric relationships between multiple detected devices and its own location.
Data Source
AI summary
A plurality of wireless devices arranged indoors, and transmitting wireless signals for acquiring position information, are authenticated. A terminal device acquires position information on the basis of the wireless signals received from the authenticated wireless devices. From the terminal device, information regarding the number of the authenticated wireless devices which are transmission sources of the wireless signals used as a bases for acquiring the position information, is acquired. On the basis of the acquired information regarding the number of the wireless devices, the position information acquired by the terminal device is authenticated.