Charging data record

For the phone equivalent, see Call detail record.

A Charging Data Record (CDR) is, in 3GPP parlance, a formatted collection of information about a chargeable event.

CDRs are used for user billing: a telecom provider transfer them from time to time in order to send bills to their users. CDRs are sent using the GTP' protocol.

Information on chargeable events includes time of call set-up, duration of the call, amount of data transferred, etc. A separate CDR is generated for each party to be charged.

Entries on CDRs use a {category, usage} syntax. Usage units can be bits (e.g. user downloaded a 1MB movie), seconds (e.g. user downloaded 1 minute of a movie), or other units (e.g. user downloaded 1 movie).

References

• 3gpp ts 32.240: Charging architecture and principles
• 3gpp ts 32.295: Charging Data Record (CDR) transfer
• 3gpp ts 32.297: Charging Data Record (CDR) file format and transfer
• 3gpp ts 32.298: Charging Data Record (CDR) parameter description