AT&T has deployed assisted GPS technology (A-GPS) within its wireless network to enhance existing and planned location-based services (LBS) used with A-GPS capable devices.
A-GPS technology gives capable devices a significant jump-start on identifying the user's initial location.
GPS devices search satellites each time they are turned on to determine starting latitude and longitude, a process that previously took as long as several minutes.
With A-GPS, AT&T's network speeds up that query by identifying nearby cell sites, helping the device more quickly hone in on the appropriate satellites. Assisted in this way, A-GPS capable devices can identify a user's initial location in fewer than 20 seconds, delivering greater convenience to customers using LBS.