Rel. 9 Gx Interface; P-Gw Rel. 9 Gx Interface Support; Introduction; Terminology And Definitions - Cisco ASR 5000 Administration Manual
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Gx Interface Support
Rel. 9 Gx Interface
Rel. 9 Gx interface support is available on the Cisco ASR chassis running StarOS 12.2 and later releases.
P-GW Rel. 9 Gx Interface Support
Introduction
The Gx reference point is located between the Policy and Charging Rules Function (PCRF) and the Policy and Charging
Enforcement Function (PCEF) on the Packet Data Network (PDN) Gateway (P-GW). The Gx reference point is used for
provisioning and removal of PCC rules from the PCRF to the PCEF and the transmission of traffic plane events from
the PCEF to the PCRF. The Gx reference point can be used for charging control, policy control, or both, by applying
AVPs relevant to the application.
The PCEF is the functional element that encompasses policy enforcement and flow based charging functionality. This
functional entity is located at the P-GW. The main functions include:
Control over the user plane traffic handling at the gateway and its QoS.
Service data flow detection and counting, as well as online and offline charging interactions.
For a service data flow that is under policy control, the PCEF shall allow the service data flow to pass through
the gateway if and only if the corresponding gate is open.
For a service data flow that is under charging control, the PCEF shall allow the service data flow to pass through
the gateway if and only if there is a corresponding active PCC rule and, for online charging, the OCS has
authorized the applicable credit with that charging key.
If requested by the PCRF, the PCEF shall report to the PCRF when the status of the related service data flow
changes.
In case the SDF is tunnelled at the BBERF, the PCEF shall inform the PCRF about the mobility protocol
tunnelling header of the service data flows at IP-CAN session establishment.
Terminology and Definitions
This section describes features and terminology pertaining to Rel. 9 Gx functionality.
Volume Reporting Over Gx
This section describes the 3GPP Rel. 9 Volume Reporting over Gx feature.
License Requirements
The Volume Reporting over Gx is a licensed Cisco feature. A separate feature license may be required. Contact your
Cisco account representative for detailed information on specific licensing requirements. For information on installing
and verifying licenses, refer to the Managing License Keys section of the Software Management Operations chapter in
the System Administration Guide.
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Cisco ASR 5000 IP Services Gateway Administration Guide ▄
Rel. 9 Gx Interface ▀
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