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
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.