Cisco Cisco Packet Data Gateway (PDG) Guida Alla Risoluzione Dei Problemi
Gx Interface Support
Rel. 7 Gx Interface ▀
Cisco ASR 5000 Series Enhanced Feature Configuration Guide ▄
OL-22982-01
trigger. If the PCRF does not provide a new usage threshold as a result of CCR from PCEF when the usage
threshold is reached, the usage monitoring is stopped at PCEF and no further usage status is reported.
threshold is reached, the usage monitoring is stopped at PCEF and no further usage status is reported.
IP CAN Session Termination: When the IP CAN session is terminated, the accumulated subscriber usage
information is reported to PCRF in the CCR-T from PCEF.
PCC Rule Removal: When the PCRF deactivates the last PCC rule associated with a usage monitoring key, the
PCEF sends a CCR with the data usage for that monitoring key. If the PCEF reports the last PCC rule
associated with a usage monitoring key is inactive, the PCEF reports the accumulated usage for that monitoring
key within the same CCR command if the Charging-Rule-Report AVP was included in a CCR command;
otherwise, if the Charging-Rule-Report AVP was included in an RAA command, the PCEF sends a new CCR
command to report accumulated usage for the usage monitoring key.
associated with a usage monitoring key is inactive, the PCEF reports the accumulated usage for that monitoring
key within the same CCR command if the Charging-Rule-Report AVP was included in a CCR command;
otherwise, if the Charging-Rule-Report AVP was included in an RAA command, the PCEF sends a new CCR
command to report accumulated usage for the usage monitoring key.
PCRF Requested Usage Report
Important:
PCRF Requested Usage Reporting is not supported in this release.
Revalidation Timeout: If usage monitoring and reporting is enabled and a revalidation timeout occurs, the PCEF
sends a CCR to request PCC rules and reports all accumulated usage for all enabled monitoring keys since the
last report (or since usage reporting was enabled if the usage was not yet reported) with the accumulated usage
at IP-CAN session level (if enabled) and at service data flow level (if enabled).
last report (or since usage reporting was enabled if the usage was not yet reported) with the accumulated usage
at IP-CAN session level (if enabled) and at service data flow level (if enabled).
Once the usage is reported, the usage counter is reset to zero. The PCEF continues to track data usage from the zero
value 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.
value 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.
How R7 Gx Works
This section describes how dynamic policy and charging control for subscribers works with Rel. 7 Gx interface support
in GPRS/UMTS networks.
in GPRS/UMTS networks.
The following figure and table explain the IMSA process between a system and IMS components that is initiated by the
UE.
UE.
In this example, the Diameter Policy Control Application (DPCA) is the Gx interface to the PCRF. The interface
between IMSA with PCRF is the Gx interface, and the interface between Session Manager (SessMgr) and Online
Charging Service (OCS) is the Gy interface. Note that the IMSA service and DPCA are part of SessMgr on the system
and separated in the figure for illustration purpose only.
between IMSA with PCRF is the Gx interface, and the interface between Session Manager (SessMgr) and Online
Charging Service (OCS) is the Gy interface. Note that the IMSA service and DPCA are part of SessMgr on the system
and separated in the figure for illustration purpose only.