Cisco Cisco Packet Data Gateway (PDG) Guía Para Resolver Problemas
Gx Interface Support
▀ Rel. 7 Gx Interface
▄ Cisco ASR 5000 Series Enhanced Feature Configuration Guide
OL-22983-01
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)
7)
RFC 3588, Diameter Base Protocol; September 2003
RFC 4006, Diameter Credit-Control Application; August 2005
Terminology and Definitions
Policy Control
The process whereby the PCRF indicates to the PCEF how to control the IP-CAN bearer.
Policy control comprises the following functions:
Binding: Binding is the generation of an association between a Service Data Flow (SDF) and the IP CAN bearer
(for GPRS a PDP context) transporting that SDF.
The QoS demand in the PCC rule, as well as the SDF template are input for the bearer binding. The selected
bearer will have the same QoS Class as the one indicated by the PCC rule.
bearer will have the same QoS Class as the one indicated by the PCC rule.
Depending on the type of IP-CAN and bearer control mode, bearer binding can be executed either by the
PCRF, or both PCRF and PCEF.
PCRF, or both PCRF and PCEF.
For UE-only IP-CAN bearer establishment mode, the PCRF performs bearer binding. When the PCRF
performs bearer binding, it indicates the bearer (PDP context) by means of Bearer ID. The Bearer ID
uniquely identifies the bearer within the PDP session.
uniquely identifies the bearer within the PDP session.
For UE/NW IP-CAN bearer establishment mode, the PCRF performs the binding of the PCC rules for
user controlled services, while the PCEF performs the binding of the PCC rules for the network-
controlled services.
controlled services.
Gating Control: Gating control is the blocking or allowing of packets, belonging to an SDF, to pass through to
the desired endpoint. A gate is described within a PCC rule and gating control is applied on a per SDF basis.
The commands to open or close the gate leads to the enabling or disabling of the passage for corresponding IP
packets. If the gate is closed, all packets of the related IP flows are dropped. If the gate is opened, the packets
of the related IP flows are allowed to be forwarded.
The commands to open or close the gate leads to the enabling or disabling of the passage for corresponding IP
packets. If the gate is closed, all packets of the related IP flows are dropped. If the gate is opened, the packets
of the related IP flows are allowed to be forwarded.
Event Reporting: Event reporting is the notification of and reaction to application events to trigger new
behavior in the user plane as well as the reporting of events related to the resources in the Gateway (PCEF).
Event triggers may be used to determine which IP-CAN session modification or specific event causes
the PCEF to re-request PCC rules. Although event trigger reporting from PCEF to PCRF can apply for
an IP CAN session or bearer depending on the particular event, provisioning of event triggers will be
done at session level.
an IP CAN session or bearer depending on the particular event, provisioning of event triggers will be
done at session level.
The Event Reporting Function (ERF) receives event triggers from PCRF during the Provision of PCC
Rules procedure and performs event trigger detection. When an event matching the received event
trigger occurs, the ERF reports the occurred event to the PCRF. If the provided event triggers are
associated with certain parameter values then the ERF includes those values in the response back to
the PCRF. The Event Reporting Function is located in the PCEF.
trigger occurs, the ERF reports the occurred event to the PCRF. If the provided event triggers are
associated with certain parameter values then the ERF includes those values in the response back to
the PCRF. The Event Reporting Function is located in the PCEF.