Navigation System Bypass Route Using Longitude Latitude Coordinates
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Solution Overview
Problem
Existing navigation systems cannot effectively reset travel routes when traffic congestion or regulations occur ahead, as they rely on external center-side map data that may not match the vehicle's map data, making it difficult to specify roads to avoid.
Innovation Solution
A navigation system with a route providing device and navigation device that transmit route search requests including a destination and avoidance range specified by longitude and latitude, allowing the route providing device to identify and bypass roads, and transmit optimal route information back to the navigation device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If route search processing is performed on the center side using link numbers and node numbers, then an optimal travel route can be obtained, but the same road may not be specified between vehicle and center map data, making it impossible to accurately identify roads to be avoided
Solution Approach 1:
The patent changes the parameter used for road identification from link numbers and node numbers (center-side specific) to longitude and latitude coordinates (universal). This parameter change ensures that the avoidance range specified by the user can be accurately identified on both the vehicle side and center side without map data version inconsistencies, thereby resolving the contradiction between measurement precision and information loss.
2Ease of operation
If link number and node number are designated to specify road to be avoided, then route reset is possible, but map data version differences cause mismatch between vehicle and center side road identification
Solution Approach 1:
The patent makes the route avoidance specification universal by using longitude and latitude coordinates instead of center-side specific link numbers and node numbers. This allows the avoidance range to be consistently identified regardless of map data versions on different sides, maintaining both ease of operation and reliability simultaneously.
3Productivity
If center side performs route search with avoidance road specification, then bypass route can be provided, but inaccurate avoidance road identification occurs due to map data differences
Solution Approach 1:
By changing the identification parameter from center-specific link/node numbers to universal longitude-latitude coordinates, the system ensures that the avoidance range is accurately identified on the center side regardless of map data versions, thereby maintaining both productivity in providing bypass routes and measurement precision in identifying the avoidance range.
Data Source
AI summary
A navigation device includes: a search request transmitting unit to transmit a route search request including an avoidance range specified by using longitude and latitude; and a search result receiving unit to receive route information transmitted in response to the route search request. A route providing device includes a search request receiving unit to receive the route search request transmitted from the navigation device; an avoidance road identifying unit to identify a road corresponding to the avoidance range included in the route search request; a route search processing unit to determine an optimal route to reach a destination by bypassing the road corresponding to the avoidance range; and a search result transmitting unit to transmit, to the navigation device, the route information indicating the determined route.