Method and system for providing location updates
US7489939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2006 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Jun 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.