Cisco ASR 5000 Series - Page 418

HRPD Serving Gateway Overview
▀ Call/Session Procedure Flows
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
Figure 112. PDN Connection Release by the HSGW Call Flow
eAN/ePCF HSGW (MAG) P-GW (LMA)UE
PPP VSNCP-Term-Req
Attached
1
PPP VSNCP-Term-Ack
6
BRI
2
BRA
3
RA
PMIPv6 Tunnel
MAG Disconnect UE
5
7
4
Table 62. PDN Connection Release by the HSGW Call Flow Description
Step
Description
1
The UE is attached to the EPC and has a PDN connection with the P-GW for PDN-ID=x and APN with assigned HNP.
2
A PGW trigger causes a disconnect of the PDN connection for PDNID=x and the PGW sends a Binding Revocation
Indication (BRI) message to the HSGW with the following attributes: MNID, APN, HNP.
3
The HSGW responds to the BRI message with a Binding Revocation Acknowledgement (BRA) message with the sane
attributes (MNID, APN, HNP).
4
The HSGW MAG service triggers a disconnect of the UE PDN connection for PDNID=x.
5
The HSGW sends a PPP VSNCP-Term-Req with PDNID=x to the UE.
6
The UE acknowledges the receipt of the request with a VSNCP-Term-Ack (PDNID=x).