Cisco Cisco Packet Data Interworking Function (PDIF) Guía Para Resolver Problemas
Gx Interface Support
Rel. 7 Gx Interface ▀
Cisco ASR 5000 Series Enhanced Feature Configuration Guide ▄
OL-22982-01
Important:
Volume reporting over Gx is applicable only for volume quota.
Important:
Only total data usage reporting is supported. Uplink/Downlink level reporting is not supported in this
release.
Important:
The PCEF only reports the accumulated usage since the last report for usage monitoring and not from
the beginning.
Important:
If the usage threshold is set to zero (infinite threshold), no further threshold events will be generated
by PCEF, but monitoring of usage will continue and be reported at the end of the session.
Important:
Usage reporting on Bearer termination is not supported.
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
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
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.
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.
Session modification where its usage was reported, then usage monitoring does not continue in the PCEF for
that IP CAN session.
Usage Monitoring
Important:
In this release, the Usage-Monitoring-Informtion AVP is expected to be present without a new
threshold to disable the usage monitoring after usage reporting when the threshold is breached. If no Usage-Monitoring-
Informtion AVP is present in the CCA-U, the monitoring will continue with the old threshold value and the reporting
happens when the threshold is breached again.
Informtion AVP is present in the CCA-U, the monitoring will continue with the old threshold value and the reporting
happens when the threshold is breached again.
Usage Monitoring at Session Level: PCRF subscribes to the session-level volume reporting over Gx by sending
the Usage-Monitoring-Information AVP with the usage threshold level set in Granted-Service-Unit AVP and
Usage-Monitoring-Level AVP set to SESSION_LEVEL(0). After the AVPs are parsed by DPCA IMSA
updates the information to ECS. Once ECS is updated usage monitoring is started and constantly checked with
the usage threshold whenever the data traffic is present.
Usage-Monitoring-Level AVP set to SESSION_LEVEL(0). After the AVPs are parsed by DPCA IMSA
updates the information to ECS. Once ECS is updated usage monitoring is started and constantly checked with
the usage threshold whenever the data traffic is present.