Cisco ASR 5000 series Product Overview page 418

▀ Call/Session Procedure Flows
Figure 112. PDN Connection Release by the HSGW Call Flow
UE eAN/ePCF
PPP VSNCP-Term-Req
PPP VSNCP-Term-Ack
6
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).
▄ Cisco ASR 5000 Series Product Overview
HSGW (MAG)
Attached
1
MAG Disconnect UE
4
5
RA
7
P-GW (LMA)
PMIPv6 Tunnel
BRI
2
BRA
3
HRPD Serving Gateway Overview
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