Navigation System Departure Time Calculation
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Solution Overview
Problem
Current navigation systems, such as PNDs, rely on users to estimate departure times based on coarse and often inaccurate information about road conditions, leading to unreliable arrival times at destinations.
Innovation Solution
A navigation system that connects to a server for real-time traffic data, calculates the most efficient route, and provides users with a recommended departure time to ensure arrival at a desired destination by considering current and historical traffic conditions, using GPS and mobile communication technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users rely on coarse and inaccurate information about road conditions, then the device complexity is reduced, but the reliability of arrival time is worsened
Solution Approach 1:
The patent introduces a server as an intermediary component that stores and provides real-time and historical traffic data. The navigation device communicates with this external server to obtain accurate traffic information without needing to store all data locally, thereby improving arrival time reliability while avoiding excessive device complexity
Solution Approach 2:
The system performs preliminary actions by pre-calculating travel times for multiple routes using historical traffic data and storing them on the server. When a user requests navigation, the system quickly retrieves pre-computed data and provides accurate departure time recommendations, improving reliability without requiring complex real-time calculations on the device
2Measurement precision
If real-time traffic data and historical travel patterns are integrated into navigation calculations, then the measurement precision of travel time is improved, but the loss of information is worsened
Solution Approach 1:
The patent segments traffic information into distinct components: real-time traffic data, historical travel patterns, and route-specific metrics. Each segment is processed and stored separately, allowing the system to retrieve only relevant information for specific routing decisions, thereby improving measurement precision while minimizing information loss through selective data management
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
This solution provides users with accurate and up-to-date information for determining the best departure time, reducing uncertainty and ensuring timely arrivals by integrating real-time traffic data and historical travel patterns into navigation calculations.
Implementation Method 1
PNDs of this type also include a GPS antenna by means of which satellite-broadcast signals, including location data, can be received and subsequently processed to determine a current location of the device
Implementation Method 2
The PND may also include electronic gyroscopes and accelerometers which produce signals that can be processed to determine the current angular and linear acceleration
Implementation Method 3
The PND may also include electronic gyroscopes and accelerometers which produce signals that can be processed to determine the current angular and linear acceleration
Data Source
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Figure 2
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AI summary
A navigation system comprises a processing resource (202) configured to receive destination data representative of a destination, to determine an expected travel time to the destination, and to determine a departure time in dependence upon the expected travel time to the destination, and an output device (206) for providing the departure time to a user.