E-OTD

Enhanced Observed Time Difference (E-OTD) is a standard for the location of mobile telephones. The location method works by multilateration. The standardisation was first carried out for GSM by the GSM standard committees (T1P1.5 and ETIS) in LCS Release 98 and Release 99. The standardisation was continued for 3G and WCDMA mobile telephones by 3GPP. Because E-OTD requires a software modification to be included in the mobile phone, E-OTD positioning system has been less commonly used than the positioning system.

E-OTD

Enhanced Observed Time Difference (E-OTD) is a standard for the location of mobile telephones. The location method works by multilateration. The standardisation was first carried out for GSM by the GSM standard committees (T1P1.5 and ETIS) in LCS Release 98 and Release 99. The standardisation was continued for 3G and WCDMA mobile telephones by 3GPP. Because E-OTD requires a software modification to be included in the mobile phone, E-OTD positioning system has been less commonly used than the positioning system.