DOWNLOADING MAP SEGMENT(S) TO A CELL PHONE BASED UPON ITS GPS COORDINATES AND MOBILITY

• US 20070219713A1
• Filed: 05/18/2007
• Published: 09/20/2007
• Est. Priority Date: 01/26/2005
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Bennett, James, Karaoguz, Jeyhan
• Granted Patent: US 7,366,610 B2
• Time in Patent Office: Days
• US Class Current: 701/208
• CPC Class Codes: G01C 21/34 Route searching; Route guidance

Abstract

A wireless terminal displays its location and navigation information (map segment) on its display. The wireless terminal accesses a Global Positioning System (GPS) receiver of the wireless terminal to determine its location coordinates. The wireless terminal determines a maximum data size for navigation information to be downloaded. The wireless terminal sends a navigation information download request to a map server via a supporting wireless network infrastructure that includes the location coordinates and the maximum data size. The wireless terminal receives navigation information that has a data size no greater than the maximum data size and displays the navigation information on the display. The wireless terminal may display a map segment and an icon representing the wireless terminal at a location corresponding to the location coordinates of the wireless terminal with respect to the map segment. The wireless terminal may download a premises map from a premises map server.

Claims

1. A method for operating a wireless terminal to display a map segment on a display of the wireless terminal, the method comprising:

accessing a Global Positioning System (GPS) receiver of the wireless terminal to determine location coordinates of the wireless terminal;

determining a maximum data size for a map segment download;

selecting a level of detail for the map segment download;

sending a map segment download request to a server via a supporting wireless network infrastructure, the map segment download request including the location coordinates, the maximum data size, and the selected level of detail;

receiving a map segment corresponding to the location coordinates of the wireless terminal the map segment having a data size no greater than the maximum data size and a level of detail corresponding to the selected level of detail; and

displaying the map segment and an icon that represents the wireless terminal on the display, the icon displayed on the map segment at a location corresponding to the location coordinates of the wireless terminal.

2. The method of claim 1, wherein determining a maximum data size for a map segment download comprises:

determining a data size of currently available memory;

estimating a data size required for other application uses; and

based upon the size of the currently available memory and the data size required for other application uses, determining the maximum data size for the map segment download.

3. The method of claim 1, wherein determining a maximum data size for a map segment download comprises:

determining a data size of currently available memory;

estimating a data size required for other application uses;

determining a data size of prior map segment(s) that may be overwritten; and

based upon the size of the currently available memory, the data size required for other application uses, and a data size of prior map segment(s) that may be overwritten, determining the maximum data size for the map segment download.

4. The method of claim 1, further comprising:

determining a map segment downloading latency;

determining a rate of motion of the wireless terminal;

estimating a duration of time when future location coordinates of the wireless terminal will depart from a current map segment; and

when the map segment downloading latency compares unfavorably to the duration of time, sending a map segment download request to a map server via the supporting wireless network infrastructure.

5. The method of claim 4, wherein determining the map segment downloading latency comprises:

estimating a data download rate from a servicing map server;

estimating a data size of a map segment to be downloaded; and

determining the map segment downloading latency based upon the download rate and the data size.

6. The method of claim 1, wherein the map segment has geographic boundaries selected to meet the maximum data size.

7. A method for operating a Global Positioning System (GPS) enabled wireless terminal, the method comprising:

accessing a GPS receiver of the wireless terminal to determine location coordinates of the wireless terminal;

detecting entering of a premises based upon comparing the location coordinates to stored premises location coordinates;

establishing communications with a premises map server via a wireless link;

downloading a premises map from the premises map server, the premises map comprising;

a plurality of points of interest; and

GPS coordinates respective to the plurality of points of interest; and

displaying the premises map on the display.

8. The method of claim 7, further comprising displaying an icon that represents the wireless terminal along with the premises map on the display at a location corresponding to the location coordinates.

9. The method of claim 7, further comprising establishing wireless communications with a premises wireless access point by:

detecting the premises wireless access point;

querying the premises wireless access point to request access; and

receiving an access grant from the premises wireless access point.

10. The method of claim 9, further comprising:

discovering the premises map server based upon interaction with the premises wireless access point; and

sending a premises map download request to the premises map server.

11. The method of claim 7, further comprising:

determining an orientation of the wireless terminal with respect to a reference direction; and

orienting the premises map on the display based upon the orientation of the wireless terminal so that the premises map is displayed in a correct orientation with reference to mapped physical features.

12. The method of claim 7, further comprising:

determining a maximum data size for a premises map download; and

sending a premises map download request to the premises map server that includes the maximum data size.

13. The method of claim 12, wherein the premises map has a data size no greater than the maximum data size.

14. The method of claim 12, wherein the premises map has geographic boundaries selected to meet the maximum data size.

15. The method of claim 12, wherein the premises map has a level of detail that causes a data size of the premises map to be no greater than the maximum data size.

16. A method for operating a wireless terminal to display a map segment on a display of the wireless terminal, the method comprising:

accessing a Global Positioning System (GPS) receiver of the wireless terminal to determine location coordinates of the wireless terminal;

determining a map segment downloading latency;

determining a rate of motion of the wireless terminal;

based upon the rate of motion of the wireless terminal, estimating a duration of time when future location coordinates of the wireless terminal will depart from a current map segment;

when the map segment downloading latency compares unfavorably to the duration of time, sending a subsequent map segment download request to the map server via the supporting wireless network infrastructure that includes the location coordinates of the wireless terminal;

receiving a map segment in response to the map segment download request; and

displaying the map segment and an icon that represents the wireless terminal on the display, the icon displayed on the map segment at a location corresponding to the location coordinates of the wireless terminal.

17. The method of claim 16, wherein determining the map segment downloading latency comprises:

estimating a data download rate from a servicing map server;

estimating a data size of a map segment to be downloaded; and

determining the map segment downloading latency based upon the download rate and the data size.

18. The method of claim 16:

further comprising determining a direction of motion of the wireless terminal; and

wherein estimation the duration of time when future location coordinates of the wireless terminal will depart from the current map segment further considers the direction of motion of the wireless terminal.

19. The method of claim 16, further comprising:

determining a maximum data size for a map segment download; and

including the maximum data size with the map segment download request.

20. The method of claim 19, wherein determining a maximum data size for a map segment download comprises:

determining a data size of currently available memory;

estimating a data size required for other application uses; and

based upon the size of the currently available memory and the data size required for other application uses, determining the maximum data size for the map segment download.

21. The method of claim 19, wherein determining a maximum data size for a map segment download comprises:

determining a data size of currently available memory;

estimating a data size required for other application uses;

determining a data size of prior map segment(s) that may be overwritten; and

based upon the size of the currently available memory, the data size required for other application uses, and a data size of prior map segment(s) that may be overwritten, determining the maximum data size for the map segment download.

22. The method of claim 19, wherein the map segment has geographic boundaries selected to meet the maximum data size.

23. The method of claim 19, wherein the map segment has a level of detail that causes the data size of the map segment to be no greater than the maximum data size.

24. A wireless terminal comprising:

a wireless interface;

a user interface including a display;

a Global Positioning System (GPS) receiver; and

a processing unit communicatively coupled to the wireless interface, the user interfaces and the GPS receiver and operable to;

access a Global Positioning System (GPS) receiver of the wireless terminal to determine location coordinates of the wireless terminal;

determine a maximum data size for a map segment download;

select a level of detail for the map segment download;

send a map segment download request to a server via a supporting wireless network infrastructure, the map segment download request including the location coordinates, the maximum data size, and the selected level of detail;

receive a map segment corresponding to the location coordinates of the wireless terminal, the map segment having a data size no greater than the maximum data size and a level of detail corresponding to the selected level of detail; and

display the map segment and an icon that represents the wireless terminal on the display, the icon displayed on the map segment at a location corresponding to the location coordinates of the wireless terminal.

25. A wireless terminal comprising:

a wireless interface;

a user interface including a display;

a Global Positioning System (GPS) receiver; and

a processing unit communicatively coupled to the wireless interface, the user interfaces and the GPS receiver and operable to;

access a GPS receiver of the wireless terminal to determine location coordinates of the wireless terminal;

detect entering of a premises based upon comparing the location coordinates to stored premises location coordinates;

establish communications with a premises map server via a wireless link;

download a premises map from the premises map server, the premises map comprising;

a plurality of points of interest; and

GPS coordinates respective to the plurality of points of interest; and

display the premises map on the display.

26. A wireless terminal comprising:

a wireless interface;

a user interface including a display;

a Global Positioning System (GPS) receiver; and

a processing unit communicatively coupled to the wireless interface, the user interfaces and the GPS receiver and operable to;

access a Global Positioning System (GPS) receiver of the wireless terminal to determine location coordinates of the wireless terminal;

determine a map segment downloading latency;

determine a rate of motion of the wireless terminal;

based upon the rate of motion of the wireless terminal, estimate a duration of time when future location coordinates of the wireless terminal will depart from a current map segment;

when the map segment downloading latency compares unfavorably to the duration of time, send a subsequent map segment download request to the map server via the supporting wireless network infrastructure that includes the location coordinates of the wireless terminal;

receive a map segment in response to the map segment download request; and

display the map segment and an icon that represents the wireless terminal on the display, the icon displayed on the map segment at a location corresponding to the location coordinates of the wireless terminal.