Cisco Cisco Packet Data Gateway (PDG)
GTPP Accounting Overview
▀ Triggers for Generation of Charging Records
▄ GTPP Interface Administration and Reference, StarOS Release 18
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Triggers for Generation of Charging Records
The following sections describe the triggers for the generation of partial and final CDRs.
ePDG-CDR Triggers
The ePDG will use the Charging Characteristics to determine whether to activate or deactivate CDR generation. The
Charging Characteristics are also used to set the coherent chargeable event conditions (e.g. time/volume limits that
trigger CDR generation or information addition). Multiple Charging Characteristics “profiles” are configured on the
ePDG to allow different sets of trigger values.
Charging Characteristics are also used to set the coherent chargeable event conditions (e.g. time/volume limits that
trigger CDR generation or information addition). Multiple Charging Characteristics “profiles” are configured on the
ePDG to allow different sets of trigger values.
ePDG-CDR Charging Information Addition
The “List of Traffic Data Volumes” attribute in the ePDG-CDR consists of a set of containers that are added when
specific trigger conditions are met, and identify the volume count per QoS, separated for uplink and downlink traffic, on
encountering that trigger condition.
specific trigger conditions are met, and identify the volume count per QoS, separated for uplink and downlink traffic, on
encountering that trigger condition.
The following table identifies the conditions that are supported to trigger ePDG-CDR charging information addition.
Table 9. Triggers for ePDG-CDR Charging Information Addition
Trigger
Conditions
Conditions
Description/Behavior
QoS Change
A change in the QoS will result that open “List of Traffic Data Volumes” containers being closed and added to the
CDR and new bearer specific container is opened. This can happen when P-GW initiates UBRequest to modify
the QoS for the session.
CDR and new bearer specific container is opened. This can happen when P-GW initiates UBRequest to modify
the QoS for the session.
Tariff Time
Change
Change
On reaching the Tariff Time Change open “List of Traffic Data Volumes” containers will be closed and added to
the CDR. Tariff-time change is for adding charging information to CDR during a particular tariff-time of day. For
example, in a day CDR can be generated at 10 AM and 8:30 PM.
the CDR. Tariff-time change is for adding charging information to CDR during a particular tariff-time of day. For
example, in a day CDR can be generated at 10 AM and 8:30 PM.
CDR Closure Open “List of Traffic Data Volumes” containers will be closed and added to the ePDG-CDR.
Volume container identifies the uplink/downlink volume since the closure of the last container. When Charging Event is
triggered by CDR Closure condition, this Change-Condition sub-field associated to the added volume container will be
omitted, except when CDR closure is due to “maximum number of charging condition changes”, where it will be
present with the original condition change.
triggered by CDR Closure condition, this Change-Condition sub-field associated to the added volume container will be
omitted, except when CDR closure is due to “maximum number of charging condition changes”, where it will be
present with the original condition change.
Triggers for ePDG-CDR Closure
The ePDG-CDR will be closed on encountering some trigger conditions.
The following table identifies the conditions that are supported to permit closure of the ePDG-CDR.