Vehicle Navigation Route Segmentation for Low-Data Map Guidance

The patent segments the navigation data into two distinct levels: route network data (coarse-level topology and connectivity) and route segment information (detailed geometric and attribute data). The vehicle first receives and processes only the compact route network data to determine the overall path, then requests detailed route segment information only for specific segments along the determined route. This segmentation allows precise navigation while minimizing data transmission volume.

The patent extracts only the essential route network data (topology, connectivity, and basic route determination information) from the complete high-resolution map data and transmits this extracted subset to the vehicle. The detailed route segment information is extracted and transmitted only after the vehicle determines it needs that level of detail for specific route segments. This extraction approach enables navigation precision while reducing data transmission requirements.

The patent performs preliminary route determination using only the compact route network data before requesting detailed route segment information. The vehicle first processes the route network data to identify the optimal path and determine which route segments require detailed information. This preliminary action allows the system to request detailed information only for necessary segments, reducing overall data transmission time while maintaining navigation completeness.

The patent implements partial action by transmitting detailed route segment information only for specific segments along the determined route rather than for all route segments. The vehicle requests detailed information selectively based on its navigation needs, receiving exactly the amount of detailed information required without unnecessary data transmission and processing overhead.