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▀ How the PDN Gateway Works
Step
Description
3c
EAP authentication is completed between the UE and the 3GPP AAA. During this transaction, the HSGW receives the
subscriber profile from the AAA server.
4a
After receiving the subscriber profile, the HSGW sends the QoS profile in A11 Session Update Message to the eAN/PCF.
4b
The eAN/PCF responds with an A11 Session Update Acknowledgement (SUA).
5a
The UE initiates a PDN connection by sending a PPP-VSNCP-Conf-Req message to the HSGW. The message includes the
PDNID of the PDN, APN, PDN-Type=IPv6/[IPv4], PDSN-Address and, optionally, PCO options the UE is expecting from
the network.
5b
The HSGW sends a PBU to the P-GW.
5c
The P-GW processes the PBU from the HSGW, assigns an HNP for the connection and responds back to the HSGW with
PBA.
5d
The HSGW responds to the VSNCP Conf Req with a VSNCP Conf Ack.
5e
The HSGW sends a PPP-VSNCP-Conf-Req to the UE to complete PPP VSNCP negotiation.
5f
The UE completes VSNCP negotiation by returning a PPP-VSNCP-Conf-Ack.
6
The UE optionally sends a Router Solicitation (RS) message.
7
The HSGW sends a Router Advertisement (RA) message with the assigned Prefix.
PMIPv6 Lifetime Extension without Handover
This section describes the procedure of a session registration lifetime extension by the P-GW without the occurrence of
a handover.
Figure 10.
▄ Cisco ASR 5x00 Packet Data Network Gateway Administration Guide
90
PMIPv6 Lifetime Extension (without handover) Call Flow
PDN Gateway Overview
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