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▀ Rel. 9 Gx Interface
Important:
over Gx feature. This feature can be enabled as part of "Policy Interface" license.
Supported Standards
The Volume Reporting over Gx feature is based on the following standard:
3GPP TS 29.212 V9.5.0 (2010-06): 3rd Generation Partnership Project; Technical Specification Group Core Network
and Terminals; Policy and Charging Control over Gx reference point (Release 9).
Feature Overview
The Volume Reporting over Gx feature provides PCRF the capability to make real-time decisions based on the data
usage by subscribers.
Important:
Important:
supported. In 10.2 and later releases, it is supported.
Important:
the beginning.
Important:
by PCEF, but monitoring of usage will continue and be reported at the end of the session.
Important:
The following steps explain how Volume Reporting over Gx works:
1. PCEF after receiving the message from PCRF parses the usage monitoring related AVPs, and sends the
information to IMSA.
2. IMSA updates the information to ECS.
3. Once the ECS is updated with the usage monitoring information from PCRF, the PCEF (ECS) starts tracking the
data usage.
4. For session-level monitoring, the ECS maintains the amount of data usage.
5. For PCC rule monitoring, usage is monitored with the monitoring key as the unique identifier. Each node
maintains the usage information per monitoring key. When the data traffic is passed, the usage is checked
against the usage threshold values and reported as described in the Usage Reporting section.
6. The PCEF continues to track data usage after the threshold is reached and before a new threshold is provided by
the PCRF. If a new usage threshold is not provided by the PCRF in the acknowledgement of an IP-CAN
Session modification where its usage was reported, then usage monitoring does not continue in the PCEF for
that IP CAN session.
Usage Monitoring
▄ Cisco ASR 5x00 Packet Data Network Gateway Administration Guide
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In 12.0 and later releases, no separate license is required for Charging over Gx / Volume Reporting
Volume Reporting over Gx is applicable only for volume quota.
In release 10.0, only total data usage reporting is supported, uplink/downlink level reporting is not
The PCEF only reports the accumulated usage since the last report for usage monitoring and not from
If the usage threshold is set to zero (infinite threshold), no further threshold events will be generated
In 12.2 and later releases, usage reporting on bearer termination is supported.
Gx Interface Support
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