SS II komplet_2011-2012.pdf

Application level Registration (I)
Home A
HSS
SIP-AS
7
3 4
6
5. REGISTER
I-CSCF
S-CSCF
8. Unauthorized
2. REGISTER 9. Unauthorized
Subscriber S-CSCF
P-CSCF I-CSCF
The A UE S-CSCF I-CSCF P-CSCF initiates contacts
finds a SIP
the
S-CSCF the challenges I-CSCF downloads Registration HSS with allocated to find the
including the help to S-
this CSCF subscriber
of authentication DNS public user serving or user selects this vector ID and a
new subscriber.
for his this private S-CSCF subscriber user for ID this
user. from the HSS
P-CSCF
Visited A
1. REGISTER 10. Unauthorized
GGSN
SGSN
Radio Access Network
A
Matus Turcsany | © Ericsson AB 2010 | December 2011 | Page 57