Method and System for Providing Location Updates

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 rage of movement, wherein the processor is further configured to transmit the dual-tone multi-frequency signal to the call canter 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 rage of movement, wherein the processor is further configured to transmit the dual-tone multi-frequency signal to the call canter 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.

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 rage 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 rage of movement, wherein the movement indicator indicates a latitude change of location of the portable computing device.