Pedestrian Location Information Delivery Using Show Radius Thresholds
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Solution Overview
Problem
Existing mobile location-based information delivery systems for pedestrians face challenges in accurately determining user location, especially in obstructed areas, and fail to provide relevant information about multiple nearby points of interest without requiring visible displays or triggers, and often do not account for user preferences in multimedia output.
Innovation Solution
A system that uses a show radius parameter to list nearby points of interest, allowing users to select relevant information, even when their calculated location differs from their actual location, using a combination of GPS data, a database of point-of-interest information, and multimedia presentation devices like audio speakers or displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If GPS-based automatic information delivery is used for pedestrians, then information can be delivered automatically based on location, but location accuracy deteriorates in obstructed areas causing mismatch between calculated and actual location
Solution Approach 1:
The system delivers information proactively before the user actually reaches the point of interest, using a threshold distance parameter. This excessive action compensates for GPS location errors by ensuring information is delivered even when the calculated location is slightly off from the actual position.
Solution Approach 2:
The system performs preliminary actions by delivering information in advance when the user enters a threshold distance from a point of interest, rather than waiting for precise location matching. This preliminary delivery accounts for potential GPS inaccuracies in obstructed areas.
2Loss of information
If multiple pieces of information are delivered automatically based on visual orientation, then comprehensive information is provided, but user control deteriorates as user cannot select specific information
Solution Approach 1:
The system dynamically adapts between two modes: automatic delivery mode for comprehensive information and user-selective mode for controlled information. Users can switch between these modes based on their needs, allowing the system to be both comprehensive and user-controlled.
Solution Approach 2:
Instead of the system automatically selecting what information to deliver, the inversion allows users to manually select from available information when desired. This reverses the control paradigm while maintaining the capability for comprehensive information delivery when automatic mode is used.
3Measurement precision
If information is delivered only when user is within prescribed distance of point-of-interest, then precise location-based delivery is achieved, but relevance deteriorates when calculated location differs from actual location
Solution Approach 1:
The system uses a threshold distance that extends beyond the precise point-of-interest location to ensure information is delivered even when GPS location is slightly inaccurate. This excessive coverage prevents loss of relevant information.
Solution Approach 2:
The system provides a cushion of tolerance by using distance thresholds rather than precise coordinate matching. This beforehand cushioning accounts for potential GPS errors and ensures information relevance is maintained despite location inaccuracies.
Data Source
AI summary
A location-based multi-media information delivery system and control for pedestrian use is disclosed, designed especially for use in areas where it is not possible to determine a user's precise location. The system automatically provides a selection list of relevant information based on the user's calculated location. The system then delivers information via the appropriate output method, based on the user's selection. Also disclosed is a system that receives location information from various systems, including global positioning satellite systems and wireless local area network systems. The system may provide video, audio and visual information.