SS II komplet_2011-2012.pdf

Application level Registration (II)
Home A
HSS
SIP-AS
13 14
1718. REGISTER
16
19. OK
15. REGISTER
I-CSCF
S-CSCF
20. OK
12. REGISTER 21. OK
Subscriber
S-CSCF
P-CSCF I-CSCF
The S-CSCF P-CSCF I-CSCF UE calculates contacts
informs finds the
authorizes the S-CSCF I-CSCF credentials HSS other with allocated that to Application the find and the this the help S- to S-
registration CSCF Servers this of re-DNS
initiates user serving about serving the and this the SIP the
informs subscriber. user's Registration. registration the The HSS
subscriber
sends the S-CSCF the
service profile
P-CSCF
Visited A
11. REGISTER 22. OK
GGSN
SGSN
Radio Access Network
A
Matus Turcsany | © Ericsson AB 2010 | December 2011 | Page 58