Cisco ASR 5000 Series, Обзор продукта

Страница: 315 / 992

GGSN Support in GPRS/UMTS Wireless Data Services
Features and Functionality - Optional Enhanced Feature Software ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Implement differentiated service profiles for different subscribers
Intelligently charge the services accessed depending on the service type and parameters
This interface is particularly suited to control and charge multimedia applications and IMS services. This interface
support is compliant to following standards:
3GPP TS 23.203 V7.6.0 (2008-03): 3rd Generation Partnership Project; Technical Specification Group Services
and System Aspects; Policy and charging control architecture (Release 7)
3GPP TS 29.210 V6.2.0 (2005-06): 3rd Generation Partnership Project; Technical Specification Group Core
Network and Terminals; Charging rule provisioning over Gx interface; (Release 6)
3GPP TS 29.212 V7.4.0 (2008-03): 3rd Generation Partnership Project; Technical Specification Group Core
Network and Terminals; Policy and Charging Control over Gx reference point (Release 7)
3GPP TS 29.213 V7.4.0 (2008-03): 3rd Generation Partnership Project; Technical Specification Group Core
Network and Terminals; Policy and Charging Control signalling flows and QoS parameter mapping; (Release
7)
RFC 3588, Diameter Base Protocol
RFC 4006, Diameter Credit-Control Application
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.
The goal of the Gx interface is to provide network based QoS control as well as dynamic charging rules on a per bearer
basis. The Gx interface is in particular needed to control and charge multimedia applications.
The Gx interface is located between the GGSN and the E-PDF / PCRF. It is a Diameter- based interface and provides
the functions provided earlier by the Gx and Go interfaces:
QoS control based on either a token-based or token-less mechanism. In the token-based mechanism, the E-PDF
or PCRF dynamically assign network resources to the different bearers used by the subscriber. These resource
assignments are transmitted in Tokens carried over the Gx interface. The authorization tokens are allocated by
the network (E-PDF/PCRF), hence the network is in full control of the mechanism since it only authorizes
resources. The token-less mechanism is for further study.
Dynamic rules for Flexible Bearer Charging. These dynamic charging rules are carried in the resource
assignment tokens and provide 5-tuple type charging rules that enables to implement a specific charging policy
for each subscriber bearer. These charging rules will be applied by the FBC function of the GGSN, and
produce the appropriate eG-CDRs or the appropriate messages on the Gy interface to the OCS.
Important:
For more information on Gx interface support, refer Gx Interface Support chapter in System
Enhanced Feature Configuration Guide .
Inter-Chassis Session Recovery
The ASR 5000 provides industry leading carrier class redundancy. The systems protects against all single points of
failure (hardware and software) and attempts to recover to an operational state when multiple simultaneous failures
occur.