Cisco Cisco Packet Data Interworking Function (PDIF) Guía Para Resolver Problemas
Gx Interface Support
Rel. 6 Gx Interface ▀
Cisco ASR 5000 Series Enhanced Feature Configuration Guide ▄
OL-22982-01
Licensing
This feature requires the following license to be installed on the chassis:
[ 600-00-7585 ] Dynamic Policy Interface — license for IMS Authorization Service feature
Supported Standards
The Rel 6. Gx interface support is based on the following standards and request for comments (RFCs):
3GPP TS 29.210, Charging rule provisioning over Gx interface
RFC 3588, Diameter Base Protocol; September 2003
RFC 4006, Diameter Credit-Control Application; August 2005
In addition to the above RFCs and standards, IMS Authorization partially supports 3GPP TS 29.212 for Policy and
Charging Control over Gx reference point functionality.
Charging Control over Gx reference point functionality.
Supported Networks and Platforms
This feature is supported on all ASR 5000 Series Platforms with StarOS Release 8.0 or later running GGSN service for
the core network services.
the core network services.
How it Works
This section describes the IMS authorization and dynamic policy support in GPRS/UMTS networks.
The following figure and table explain the IMS authorization process between a system and IMS components that is
initiated by the MN.
initiated by the MN.
In the case of GGSN, the DPCA is the Gx interface to the Control and Charging Rule Function (CRF). In this context
CRF will act as Enhanced Policy Decision Function (E-PDF). The CRF may reside in Proxy-Call Session Control
Function (P-CSCF) or on stand-alone system.
CRF will act as Enhanced Policy Decision Function (E-PDF). The CRF may reside in Proxy-Call Session Control
Function (P-CSCF) or on stand-alone system.
The interface between IMSA with CRF is the Gx interface, and between Session Manager and Online Charging Service
(OCS) is the Gy interface.
(OCS) is the Gy interface.
Note that the IMS Authorization (IMSA) service and Diameter Policy Control Application (DPCA) are part of Session
Manager on the system, and separated in the following figure for illustration purpose only.
Manager on the system, and separated in the following figure for illustration purpose only.