Cisco Cisco Packet Data Interworking Function (PDIF) Guida Alla Risoluzione Dei Problemi
Gx Interface Support
▀ Rel. 7 Gx Interface
▄ Cisco ASR 5000 Series Enhanced Feature Configuration Guide
OL-22982-01
Figure 13. Rel. 7 Gx IMS Authorization Call Flow
UE
SessMgr
IMSA
DPCA
PCRF
ECSv2
OCS
1
2
3
5
4
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Table 10.
Rel. 7 Gx IMS Authorization Call flow Description
Step
Description
1
UE (IMS subscriber) requests for primary PDP context activation/creation.
2
SessMgr allocates an IP address to the UE.
3
SessMgr requests IMS Authorization, if IMSA is enabled for the APN.
4
IMSA allocates resources for the IP CAN session and the bearer, and selects the PCRF to contact based on the user's
selection key (ex msisdn).
selection key (ex msisdn).
5
IMSA requests the DPCA module to issue an auth request to the PCRF.