Diameter Accounting And Credit Control - Cisco ASR 5000 series Product Overview

Enhanced Charging Service Overview

Diameter Accounting and Credit Control

The Diameter Credit Control Application (DCCA) is used to implement real-time online and/or offline charging and
credit control for a variety of services, such as network access, messaging services, and download services.
In addition to being a general solution for real-time cost and credit control, DCCA includes these features:
Real-time Rate Service Information: DCCA can verify when end subscribers' accounts are exhausted or
expired; or deny additional chargeable events.
Support for Multiple Services: DCCA supports the usage of multiple services within one subscriber session.
Multiple service support includes:
Gx Interface Support
Important:
The Gx interface is used in IMS deployment in GPRS/UMTS networks. Gx interface support on the system enables
wireless operators to intelligently charge the services accessed depending on the service type and parameters with rules.
It also provides support for IP Multimedia Subsystem (IMS) authorization in a GGSN service. The goal of the Gx
interface is to provide network-based QoS control as well as dynamic charging rules on a per bearer basis for an
individual subscriber. The Gx interface is in particular needed to control and charge multimedia applications.
Rel 6. Gx Interface: The provisioning of charging rules that are based on the dynamic analysis of flows used for the
IMS session is carried out over the Gx interface. The Rel. 6 Gx interface is located between the Access Gateway
functioning as Traffic Plane Function (TPF), and the Charging Rule Function (CRF). The GGSN/TPF acts as the client
where as the CRF contains the Diameter server functionality. Rel. 6 Gx interface is based on the Diameter base protocol
(DIABASE) and the Diameter Credit Control Application (DCCA) standard.
Rel. 7 Gx Interface: The Rel. 7 Gx interface enables policy-based admission control support (enforcing policy control
features like gating, bandwidth limiting, etc.,) and Flow-based Charging (FBC). This is accomplished via dynamically
provisioned Policy Control and Charging (PCC) rules. These PCC rules are used to identify service data flows and do
charging. Other parameters associated with the rules are used to enforce policy control.
The PCC architecture allows operators to perform service-based QoS policy, and flow-based charging control. In the
PCC architecture, this is accomplished mainly by the Policy and Charging Enforcement Function (PCEF)/GGSN and
the Policy and Charging Rules Function (PCRF).
Important:
Enhanced Feature Configuration Guide.
OL-22938-02
The ability to identify and process the service or group of services that are subject to different cost
structures.
Independent credit control of multiple services in a single credit control sub-session.
This feature is only available in GGSN/UMTS networks.
For more information on Gx interface support, see Gx Interface Support chapter of the System
Accounting Interfaces ▀
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