Cisco ASR 5000 Series User Manual

IP Services Gateway Overview
Enhanced Feature Support ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Enhanced Feature Support
This section describes the enhanced features supported by IPSG.
IMS Authorization Service
To support roaming IMS subscribers in a GPRS/UMTS network, the IPSG must be able to charge only for the amount
of resources consumed by the particular IMS application and bandwidth used. The IPSG must also allow for the
provisioning and control of the resources used by the IMS subscriber. To facilitate this, the IPSG supports the R7 Gx
interface to a Policy Control and Charging Rule Function (PCRF).
For detailed information on the Gx Interface support, refer to the Gx Interface Support chapter of the System Enhanced
Feature Configuration Guide.
Note the following for IPSG:
Only single bearer/session concept is supported. Multiple bearer concept is not applicable.
Only PCRF binding is applicable. PCEF binding is not applicable.
The following figure shows the interface and basic message flow of the Gx interface.
Figure 116. PSG Message/Data Flow (RADIUS Server Mode - IMS Auth Service)
IPSG also supports IMS Authorization Service Session Recovery with the following limitations:
Active calls only

Cisco ASR 5000 Series Specifications

General

Brand	Cisco
Model	ASR 5000 Series
Category	Network Router
Language	English