PRE-CACHING OF NAVIGATION CONTENT BASED ON CELLULAR NETWORK COVERAGE

摘要

Embodiments are disclosed for caching navigation content. An example navigation system includes map data memory, a position sensor that determines the present location of the navigation system and provides a navigation system position signal indicative thereof, a wireless transmitter that transmits the navigation system position data, and a wireless receiver that receives cellular data including cellular white spot map data and cellular non-white spot map data in response to the transmitted navigation system position data and stores the received cellular white spot map data and the cellular non-white spot map data in the map data memory. The example navigation system also includes a processor that receives the navigation system position signal and forms a map image based upon received cellular white spot map data when the wireless receiver is not receiving cellular data.

主权项

1. A navigation system that caches map data associated with wireless white spots, the system comprising:
map data memory; a position sensor that determines a present location of the navigation system and provides navigation system position data indicative thereof; a wireless transmitter that transmits the navigation system position data; a wireless receiver that receives wireless data including wireless white spot map data and wireless non-white spot map data in response to the transmitted navigation system position data and stores the received wireless white spot map data and the wireless non-white spot map data in the map data memory; and a processor that receives the navigation system position signal and forms a map image based upon the received wireless white spot map data and the navigation system position data when the wireless receiver is not receiving the wireless data.