Cisco Cisco Packet Data Gateway (PDG) 관리자 가이드
Gx Interface Support
▀ Rel. 8 Gx Interface
▄ Cisco ASR 5x00 Home Agent Administration Guide
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Figure 18. HA/PDSN Rel. 8 Gx IMS Authorization Call Flow
Table 17. HA/PDSN Rel. 8 Gx IMS Authorization Call flow Description
Step
Description
1
UE (IMS subscriber) requests for MIP Registration Request.
2
SessMgr allocates an IP address to the UE.
3
SessMgr requests IMS Authorization, if IMSA is enabled for the subscriber.
IMSA service can either be configured in the subscriber template, or can be received from the AAA.
IMSA service can either be configured in the subscriber template, or can be received from the AAA.
4
IMSA allocates resources for the IP-CAN session, and selects the PCRF to contact based on the user's selection key (for
example, round-robin).
example, round-robin).
5
IMSA requests the DPCA module to issue an auth request to the PCRF.