Cisco ASR 5000 Series User Manual

PDN Gateway Overview
How the PDN Gateway Works ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Figure 137. PMIPv6 Lifetime Extension (without handover) Call Flow
eAN/ePCF HSGW (MAG) P-GW (LMA)UE
PBU
5
3
Attached
1
Lifetime refresh trigger
2
New lifetime
4
PBA
Table 73. PMIPv6 Lifetime Extension (without handover) Call Flow Description
Step
Description
1
The UE is attached to the EPC and has a PDN connection with the P-GW where PDNID=x and an APN with assigned
HNP.
2
The HSGW MAG service registration lifetime nears expiration and triggers a renewal request for the LMA.
3
The MAG service sends a Proxy Binding Update (PBU) to the P-GW LMA service with the following attributes: Lifetime,
MNID, APN, ATT=HRPD, HNP.
4
The P-GW LMA service updates the Binding Cache Entry (BCE) with the new granted lifetime.
5
The P-GW responds with a Proxy Binding Acknowledgement (PBA) with the following attributes: Lifetime, MNID, APN.
PDN Connection Release Initiated by UE
This section describes the procedure of a session release by the UE.

Cisco ASR 5000 Series Specifications

General

Brand	Cisco
Model	ASR 5000 Series
Category	Network Router
Language	English