A-GPS – Assisted Global Positioning System

Leveraging the global network of GPS satellites, TruePosition's SUPL A-GPS (Assisted Global Positioning System or Assisted GPS) platform allows carriers to provide high-performance location services without making significant changes to their infrastructure.

A-GPS "At-A-Glance"

• Secure User Plane A-GPS – A-GPS uses multiple satellite transmitters to triangulate a GPS-equipped phone or device, plus a SUPL Platform that enhances performance, accuracy, and quality by leveraging the carrier's existing wireless network
• SUPL server based A-GPS accuracy may vary from sub-10-meters to hundreds of meters
• Maximum Latency reduced to under 20 seconds
• Velocity information is also available

Assisted GPS (AGPS) - Highlights

• Combines GPS with an OMA-standard SUPL architecture, allowing it to interact with all compliant GPS-equipped mobile phones using TCP/IP over existing GPRS/EDGE and IP networks
• Requires no changes to the carrier's architecture; reuses existing services such as SMS and GPRS
• TruePosition also offers hybrid solutions, combining A-GPS with U-TDOA to both incorporate all non-GPS handsets as well as strengthen coverage in urban canyons, indoors, and wherever A-GPS does not calculate a location

Secure User Plane A-GPS

Combining the global network of GPS satellites with the TruePosition Secure User Plane for Location (SUPL) platform, TruePosition A-GPS provides a fast, reliable, and accurate platform for Location Based Services that locates GPS-enabled mobile phones.

With traditional GPS, a handset requires direct contact to at least three GPS satellites. Sometimes, it can take several minutes to collect enough satellite navigation data to determine a position. In addition, in areas with many tall buildings, the satellites' signals are often blocked or weakened resulting in unreliable GPS operation.

For these reasons, TruePosition offers both standalone A-GPS as well as hybrid solutions that combine A-GPS with network-based location systems (like Cell ID, Enhanced Cell ID, or U-TDOA). This allows the system to locate handsets without special GPS chipsets, as well as strengthen coverage and accuracy in urban canyons, indoors, and wherever A-GPS performance is less than optimal.