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PDN Gateway Overview
▀ Network Deployment(s)
▄ Cisco ASR 5x00 Packet Data Network Gateway Administration Guide
36
Gx Interface
This signalling interface supports the transfer of policy control and charging rules information (QoS) between the Policy
and Charging Enforcement Function (PCEF) on the P-GW and a Policy and Charging Rules Function (PCRF) server
(3GPP TS 23.401).
Supported protocols
:
Transport Layer: TCP, SCTP
Network Layer: IPv4, IPv6
Data Link Layer: ARP
Physical Layer: Ethernet
For more information on the Gx interface, refer to
Dynamic Policy Charging Control (Gx Reference Interface)
in the
Features and Functionality - Base Software
section of this chapter.
Rf Interface
The Rf reference interface enables offline accounting functions on the P-GW in accordance with 3GPP Release 8 and
Release 9 specifications. The P-GW collects charging information for each mobile subscriber UE pertaining to the radio
network usage.
Supported protocols
:
Transport Layer: TCP
Network Layer: IPv4, IPv6
Data Link Layer: ARP
Physical Layer: Ethernet
For more information on Rf accounting, refer to the section in the
Features and Functionality - Base Software
section of
this chapter.
Gy Interface