Navigation system client terminal, service terminal, and map data providing and responding method

Abstract

The invention discloses a client of a navigation system, a corresponding server, a method for providing map data of the client of the navigation system, and a matched server response method. The client comprises a storage module, a navigation module and a storage update module. When the storage module does not have the required map data, the client is used for downloading the map data, storing the map data in the storage module and providing the map data for the navigation module for navigation; the corresponding server comprises a data extraction request receiving module and is used for acquiring the content of the request by the client according to the data extraction request receiving module and sending the requested map data to a map data sending module of the client. As the storage update module is arranged in the client, when the required map data is not available in the client, the client can automatically download the required map data from the corresponding server, thus realizing the navigation function, allowing the client with inadequate map data to acquire the required map data from the server, and facilitating usage.

Description

technical field [0001] The present invention relates to the field of GPS navigation, and more specifically, relates to a navigation system client, a corresponding server, a method for providing map data of the navigation system client, and a method for responding to the server that cooperates with the navigation system. Background technique [0002] At present, the global positioning system (Global Positioning System, GPS) for vehicles is one of the important application directions of GPS navigation. The GPS antenna of the car GPS navigation system receives the data information transmitted by at least 3 of the 24 GPS satellites around the earth, combined with the electronic map stored in the car navigation terminal, the position coordinates determined by the GPS satellite signal and this match to determine the exact position of the navigation object in the electronic map. [0003] figure 1 Shows the structural composition of the existing navigation system: [0004] Descri...

AI Technical Summary

Problems solved by technology

This puts high demands on the hardware, making some terminal devices with small storage capacity, such as mobile phones with small storage capacity, unable to realize the navigation function, which limits the application of the navigation system

For example, although some existing smart phones support navigation functions, their storage ROM capacity is often only about 50 megabytes. Because the storage capacity is too small to accommodate all electronic maps, some existing navigation systems usually only save a few A small part of the map for regional navigation

But because the user has the possibility of navigating to all places in the People's Republic of China, this kind of navigation system with a small hardware storage capacity cannot navigate other areas other than the area supported by the map data in its storage module at all. Very inconvenient

Images