Cisco Cisco Packet Data Gateway (PDG) Ratgeber Für Administratoren
Gx Interface Support
Rel. 8 Gx Interface ▀
Cisco ASR 5x00 Home Agent Administration Guide ▄
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Indication of IP-CAN Session Termination: When the IP-CAN session is being terminated the PCEF contacts the
PCRF.
Request of IP-CAN Session Termination: If the PCRF decides to terminate an IP-CAN session due to an internal
trigger or trigger from the SPR, the PCRF informs the PCEF. The PCEF acknowledges to the PCRF and
instantly removes/deactivates all the PCC rules that have been previously installed or activated on that IP-CAN
session.
instantly removes/deactivates all the PCC rules that have been previously installed or activated on that IP-CAN
session.
The PCEF applies IP-CAN specific procedures to terminate the IP-CAN session. The HA/PDSN sends a MIP
Revocation Request with the teardown indicator set to indicate that the termination of the entire IP-CAN
session is requested. Furthermore, the PCEF applies the “Indication of IP-CAN Session Termination”
procedure.
Revocation Request with the teardown indicator set to indicate that the termination of the entire IP-CAN
session is requested. Furthermore, the PCEF applies the “Indication of IP-CAN Session Termination”
procedure.
Use of the Supported-Features AVP during session establishment to inform the destination host about the
required and optional features that the origin host supports.
How it Works
This section describes how HA/PDSN Rel. 8 Gx Interface support works.
The following figure and table explain the IMS Authorization process between a system and IMS components that is
initiated by the UE.
initiated by the 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.
Important:
In 14.0 and later releases, the DPCA and the IMSA will be acting as one module within the Policy
Server interface application.