Fixed Wireless CBSD Location Accuracy via Sensor Fusion
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Solution Overview
Problem
Current wireless devices lack the capability to provide accurate and reliable three-dimensional location information, especially in environments with physical obstacles or limited satellite access, leading to inconsistent and inadequate location-based services.
Innovation Solution
A method and system that determine a more precise location of fixed wireless devices by combining location information from multiple sources, including GPS, dead reckoning, network-provided data, and trilateration, using a processor to generate longitude, latitude, and altitude values, and sharing this information among grouped wireless devices to enhance location-based services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS is used to determine location, then location information can be obtained, but accuracy deteriorates in environments with physical obstacles or limited satellite access
Solution Approach 1:
The patent combines multiple location determination methods (GPS, dead reckoning, network-provided data, and trilateration) into a unified system that integrates their respective strengths. When GPS signal is available, it provides global positioning; when obscured by physical obstacles, dead reckoning maintains continuity using motion sensors; network-provided data supplements with cell tower triangulation; and trilateration using wireless signal strength provides additional spatial reference points. This merging resolves the contradiction by ensuring location accuracy is maintained across diverse environmental conditions.
Solution Approach 2:
The patent introduces intermediary systems and data sources that bridge the gap between GPS limitations and reliable location determination. Dead reckoning acts as an intermediary that continues location tracking using inertial sensors when GPS is blocked. Network-provided location data serves as an intermediary layer using cellular infrastructure. These intermediaries resolve the contradiction by providing alternative location determination paths when primary GPS-based methods fail.
2Measurement precision
If multiple location determination methods are combined, then location accuracy improves, but system complexity increases
Solution Approach 1:
The patent implements a dynamic location determination system that adapts its complexity based on environmental conditions and available resources. The system dynamically selects and weights different location methods: GPS is primary when satellites are visible; dead reckoning becomes dominant when GPS signal degrades; network-provided data and trilateration are activated based on wireless network availability. This dynamic adaptation resolves the contradiction by optimizing the balance between accuracy and complexity in real-time, rather than maintaining fixed high complexity regardless of conditions.
Solution Approach 2:
The patent changes operational parameters of the location system based on detected conditions. It monitors GPS signal quality, motion sensor data availability, and network connection status to adjust which location determination methods are active and their relative weighting. When GPS accuracy deteriorates, the system parameter changes to increase reliance on dead reckoning and trilateration. This parameter-based control resolves the contradiction by systematically managing complexity through conditional activation rather than always maintaining maximum system capability.
Data Source
AI summary
Methods, systems and devices for determining a more precise location of a fixed wireless device and providing an enhanced location based service (eLBS). A fixed wireless device may be configured to determine its approximate location (e.g., a current location waypoint, etc.), communicate with other fixed or mobile wireless devices to receive location information, and determine a more precise location of the fixed wireless device based on the approximate location and the received location information. The fixed wireless device may use the computed location information to provide a location based service and/or send the more precise location to another wireless device for use in providing a location based service.