Microcell Beacons for Indoor Positioning Accuracy
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Solution Overview
Problem
Current position determination systems, such as hybrid GPS and cellular networks, face challenges in achieving precise location fixes in environments with severe GPS signal blockage, like indoor areas, where traditional methods result in reduced location fix yield and accuracy.
Innovation Solution
The implementation of microcell beacons using low-cost, mass-market electronics for wireless local area data communication (e.g., Bluetooth or WiFi) to broadcast site-specific location information, which is received by mobile stations and combined with GPS and cellular positioning data to enhance position determination accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional GPS and cellular positioning methods are used, then the system can provide location services, but the location fix yield and accuracy are reduced in indoor environments with severe GPS signal blockage
Solution Approach 1:
The patent introduces microcell beacons as intermediary transmitters that broadcast location information in indoor environments. These beacons act as mediators between the mobile station and the positioning system, providing reference signals that enable accurate location determination without requiring direct GPS satellite signals. The beacons transmit identification data that mobile stations use to calculate their position through trilateration, thereby improving location accuracy and fix yield in GPS-denied areas.
2Measurement precision
If microcell beacons are deployed to provide location information in indoor areas, then location accuracy improves, but the system complexity increases
Solution Approach 1:
The patent employs microcell beacons that function as simple, low-cost transmission devices. Each beacon is a relatively simple unit that broadcasts identification data without requiring complex processing capabilities. The beacons are deployed as discrete, inexpensive nodes throughout the indoor environment, and their simplicity reduces the overall system complexity compared to deploying fully functional communication infrastructure. The beacons' primary function is to transmit location reference information, which simplifies their design and reduces system complexity.
3Adaptability or versatility
If multiple positioning methods (GPS, cellular, microcell beacons) are combined, then location accuracy in diverse environments improves, but the device complexity and processing requirements increase
Solution Approach 1:
The patent implements a universal positioning approach where mobile stations are equipped with multiple receiving capabilities (GPS receiver, cellular communication interface, and microcell beacon receiver). The station's processing system is designed to universally handle different positioning methods by extracting location information from various sources (satellite signals, cellular tower data, and beacon transmissions) and integrating them through a unified position determination algorithm. This multi-functional design enables the same device to operate accurately in diverse environments without requiring separate specialized systems for each positioning method.
Data Source
AI summary
Methods and apparatuses for microcell beacon assisted position determination. In one embodiment, microcell beacons that are based on low cost, mass market electronics for wireless local area data communication (e.g., Bluetooth or WiFi) are used to broadcast to mobile stations location information and/or identification information, which can be used to look up for the location information, to improve the precision of position solutions in a wide area position determination system (e.g., a GPS system, an AFLT system, or a hybrid system). In one embodiment, the location information and/or the identification information are site specific; and, the distribution and the transmission strength of the microcell beacons are adjusted to prevent misidentification. In one embodiment, the microcell beacons have the transmission capability but not the receiving capability for wireless local area data communication; and, the mobile station has the receiving capability but not the transmission capability for wireless local area data communication.