Car Navigation Map Update Preview Mechanism
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Solution Overview
Problem
Users of conventional car navigation systems are uncertain about the cost and time required for updating map data, as they cannot preview the changes before downloading, leading to insecurity and inefficiency in the update process.
Innovation Solution
A method is introduced where the system allows users to request and receive outline difference data before downloading detailed updates, enabling them to preview the changes and feel more secure about the update process, involving a terminal and a server that exchange messages to deliver difference map data, with the server sending outline difference data first and then detailed data upon request.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all map data is updated in a batch at once, then the map data is updated to the newest version, but it takes considerable amounts of money and time
Solution Approach 1:
The patent segments the complete map data update into two parts: (1) delivery of difference map data containing only the updated portions, and (2) user preview of the update contents before final download. This segmentation allows the system to reduce update time and cost by transmitting only necessary data while maintaining complete update reliability through the preview mechanism that ensures users confirm the changes before full installation.
2Loss of time
If difference data is updated, then the update time and cost are reduced, but the user cannot preview the update contents and feels insecure
Solution Approach 1:
The patent implements preliminary action by requiring the terminal to display and confirm the difference map data contents before actually downloading the data to the storage unit. The update process is divided into stages: first displaying the difference data for user review and confirmation, then proceeding to download only after user approval. This preliminary review stage builds user confidence while maintaining the efficiency benefits of difference data updates.
3Productivity
If detailed difference data is delivered immediately, then the update process is fast, but the user cannot preview and may waste time downloading unnecessary data
Solution Approach 1:
The patent segments the data delivery process into two phases: first delivering and displaying difference map data for user preview, then delivering the complete detailed data only after user confirmation. This segmentation allows the system to prioritize user review time to prevent unnecessary downloads while maintaining fast update speeds for the actual data transmission phase.
4Reliability
If the system delivers only outline difference data first, then the user can preview changes, but the detailed data must be delivered separately
Solution Approach 1:
The patent segments the map data into difference map data (containing only updated portions) and complete detailed data. The delivery process is segmented into two stages: first delivering difference data for preview and confirmation, then delivering complete detailed data after user approval. This segmentation increases user confidence by enabling preview while managing complexity through a clear, sequential process with distinct phases for data delivery and user confirmation.
Data Source
AI summary
The present invention provides, in a car navigation system, a unit of notifying a user of the update contents of map data prior to the downloading of the map data. A vehicle-mounted terminal sets a difference update area in accordance with a selection made by a user and sends a difference update request to a map updating server. If an update mode in this case is “update after outline display”, the vehicle-mounted terminal downloads an outline update map from the map updating server. The outline update map is displayed on a display unit of a display. Here, when a download start button displayed on the display unit is depressed, the vehicle-mounted terminal downloads a detailed update map from the map updating server. The detailed update map is then displayed on the display unit of the display. Furthermore, an updating process is performed on the map data stored in a terminal DB.