Analyzing call locations using advanced CDRs

This topic introduces the use of the advanced location information which is available from some CDRs.

Some operators provide call detail records with enhanced data that provides additional location and movement information. This additional information allows you to define the most likely location of a phone, and to track a phone's movements in more detail. This additional location information can be in the following formats:

• The estimated or triangulated call location of the phone based on a variety of technology measurements. The operator's CDR provides both the latitude and longitude of the call along with a confidence level. This confidence level can be provided either as a specific distance in meters or as a confidence level such as low, medium or high. For further information refer to Using call locations calculated from triangulated data.
• The distance the phone was from the tower, which is referred to as either TA (Timing Advance) or RTT (round trip time). This is helpful in narrowing down the call location. For further information refer to Using TA data.
• One or more handover (HO) sectors involved in the same call record. This is helpful as it helps you to track a phone's movements in more detail. For further information refer to Using handover data.

These advanced location information CDRs are uploaded to OSS-ESPA using the same method as standard CDRs. You can upload multiple CDRs to the same phone number, for example you may want to upload a normal CDR and an advanced TA CDR.

This feature requires option E7 Advanced CDRs. If you do not have this option this feature is not available.

The following table provides examples of what the different operator's formats provide:

		Provides estimated call location		Provides additional movement tracking
Operator format	Standard CDR call details	Call location (triangulated data)	TA data	Handover data
ATT CDR	Yes	No	No	Yes
ATT LocDBoR (ReportLoc_(Case ID).txt ) Formerly known as NELOS.	No	Yes, with confidence level a specified distance	No	No
ATT Timing Advance (ReportTA_(Case ID).txt )	No	No	Yes	No
Sprint RTT/PCMD (prior format)	Limited as origination and destination numbers are not defined in a standard format, only the call duration and RTT/TA measurements	Yes, but no confidence level	Yes	No
T-Mobile timing advance (TimingAdvance _(IMSI)_Date Range.xls)	No	Yes, with confidence level as high, medium and low, unknown	Yes	No
Verizon RTTM, RTTL, Nortix, Mevdort (prior formats)	Limited as origination and destination numbers are not defined in a standard format	Yes, with confidence level as high, medium and low, unknown	Yes	No
Verizon RTT report	No	No	Yes	No

For more details, refer to the individual topics.