Method and system for providing location updates
A method and system of updating location information of a portable computing device is disclosed. Location data is received from a positioning device. A voice link is utilized for communication between the portable computing device and a call center. A dual-tone multi-frequency signal is mapped to a pre-determined range of movement. The dual-tone multi-frequency signal is transmitted to the call center when a longitude measurement in the location data indicates a change in longitude that is within the pre-determined rage of movement. The dual-tone multi-frequency signal is transmitted as an indicator of longitude change of location of the portable computing device. In addition, the dual-tone multi-frequency signal is transmitted to the call center when a latitude measurement in the location data indicates a change in latitude that is within the pre-determined rage of movement. The dual-tone multi-frequency signal is transmitted as an indicator of latitude change of location of the portable computing device.
1. A method of updating location information of a portable computing device, comprising:
receiving location data from a positioning device;
communicating with a call center through a voice link;
mapping a dual-tone multi-frequency signal to a pre-determined range of movement;
transmitting to the call center the dual-tone multi-frequency signal when a longitude measurement in the location data indicates a change in longitude that is within the pre-determined range of movement, wherein the dual-tone multi-frequency signal is transmitted as an indicator of longitude change of location of the portable computing device; and
transmitting to the call center the dual-tone multi-frequency signal when a latitude measurement in the location data indicates a change in latitude that is within the pre-determined range of movement, wherein the dual-tone multi-frequency signal is transmitted as an indicator of latitude change of location of the portable computing device.
2. The method of claim 1 , wherein the dual-tone multi-frequency signal is transmitted through the voice link.
3. The method of claim 1 , wherein the positioning device is a ground positioning system device.
4. The method of claim 1 , wherein the call center is public safety answering point.
5. The method of claim 1 , wherein the portable computing device is a personal data assistant, a cellular telephone, a smart phone, or a laptop computer.
6. The method of claim 1 , wherein the pre-determined range of movement is 0 degrees to 0.0045 degrees.
7. The method of claim 1 , wherein the pre-determined range of movement is 0.0046 degrees to 0.0090 degrees.
8. The method of claim 1 , wherein the call center calculates a new location latitude of the portable computing device by adding an old location latitude of the portable computing device and the pre-determined range of movement corresponding to the dual-tone multi-frequency signal received.
9. The method of claim 1 , wherein the call center calculates a new location longitude of the portable computing device by adding an old location longitude of the portable computing device and the division of the pre-determined range of movement corresponding to the dual-tone multi-frequency signal received by the cosine of the old location longitude.
10. A portable computing device, comprising:
a positioning device that receives location data;
a memory module that stores a table that includes a dual-tone multi-frequency signal mapped to a pre-determined range of movement;
a voice communication transceiver that communicates with a call center through a voice link; and
a processor configured to determine when a longitude measurement in the location data indicates a change in longitude that is within the pre-determined range of movement, wherein the processor is further configured to transmit the dual-tone multi-frequency signal to the call center through the voice communication transceiver, the dual-tone multi-frequency signal being transmitted as an indicator of longitude change of location of the portable computing device, the processor being configured to determine when a latitude measurement in the location data indicates a change in latitude that is within the pre-determined range of movement, wherein the processor is further configured to transmit the dual-tone multi-frequency signal to the call center through the voice communication transceiver, the dual-tone multi-frequency signal being transmitted as an indicator of latitude change of location of the portable computing device.
11. The portable computing device of claim 10 , wherein the dual-tone multi-frequency signal is transmitted through the voice link.
12. The portable computing device of claim 10 , wherein the positioning device is a ground positioning system device.
13. The portable computing device of claim 10 , wherein the call center is public safety answering point.
14. The portable computing device of claim 10 , wherein the portable computing device is a personal data assistant, a cellular telephone, a smart phone, or a laptop computer.
15. The portable computing device of claim 10 , wherein the pre-determined range of movement is 0 degrees to 0.0045 degrees.
16. The portable computing device of claim 10 , wherein the pre-determined range of movement is 0.0046 degrees to 0.0090 degrees.
17. The portable computing device of claim 10 , wherein the call center calculates a new location latitude of the portable computing device by adding an old location latitude of the portable computing device and the pre-determined range of movement corresponding to the dual-tone multi-frequency signal received.
18. The portable computing device of claim 10 , wherein the call center calculates a new location longitude of the portable computing device by adding an old location longitude of the portable computing device and the division of the pre-determined range of movement corresponding to the dual-tone multi-frequency signal received by the cosine of the old location longitude.
19. A method of updating location information of a portable computing device, comprising:
receiving location data from a positioning device;
communicating with a call center through a data link;
mapping a movement indicator to a pre-determined range of movement;
transmitting to the call center the movement indicator in a first data packet when a longitude measurement in the location data indicates a change in longitude that is within the pre-determined range of movement, wherein the movement indicator indicates a longitude change of location of the portable computing device; and
transmitting to the call center the movement indicator in a second data packet when a latitude measurement in the location data indicates a change in latitude that is within the pre-determined range of movement, wherein the movement indicator indicates a latitude change of location of the portable computing device.
20. The method of claim 19 , wherein the movement indicator is transmitted through the data link.
21. The method of claim 19 , wherein the positioning device is a ground positioning system device.
22. The method of claim 19 , wherein the call center is public safety answering point.
23. The method of claim 19 , wherein the portable computing device is a personal data assistant, a cellular telephone, a smart phone, or a laptop computer.
24. The method of claim 19 , wherein the pre-determined range of movement is 0 degrees to 0.0045 degrees.
25. The method of claim 19 , wherein the pre-determined range of movement is 0.0046 degrees to 0.0090 degrees.
26. The method of claim 19 , wherein the call center calculates a new location latitude of the portable computing device by adding an old location latitude of the portable computing device and the pre-determined range of movement corresponding to the movement indicator received.
27. The method of claim 19 , wherein the call center calculates a new location longitude of the portable computing device by adding an old location longitude of the portable computing device and the division of the pre-determined range of movement corresponding to the movement indicator received by the cosine of the old location longitude.