Methods presented above, based on signal propagation time measurement (U-TDOA,
E-OTD OTDOA) can be implemented by installing specific hardware and software on provider's side.
Test cases are defined for signaling conformance with GPS, A-GPS, and
E-OTD technologies.
The
E-OTD approach is based upon a sophisticated signal-processing algorithm that requires only a firmware modification to standard mobile handsets.
CPS will also provide
E-OTD software integration for Siemens handsets in anticipation of
E-OTD enabled location-based network equipment and handsets to the US and worldwide markets.
Based on the Enhanced Observed Time Difference (
E-OTD) method, Cursor offers high accuracy mobile location - up to 50m on GSM networks according to CPS.