3GPP TS 24.228 -- IMS Signalling flows for Session Initiation
|
|
|
|
|
|
|
| Session Initiation: Non Hiding |
| |
|
| |
|
| |
|
| |
|
| |
|
|
|
|
| Session Initiation: Hiding |
| |
|
| |
|
| |
|
| |
|
| | |
|
|
|
|
| - |
Mobile Origination, located in home network
|
| - |
PSTN Termination performed by Home Network of Originator
|
| - |
CS Network Termination
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| - |
UE#1 builds an SDP offer containing bandwidth requirements and characteristics for
each set of codecs that it is capable of supporting for this session. It assigns local port numbers for
each possible media flow.
UE#1 is willing to establish a multimedia session comprising a
video stream and an audio stream. The video stream supports two codecs, either H.263 or MPEG-4
Visual. The audio stream supports the AMR codec.
|
| - |
Request-URI:
contains the international E.164 number from the user.
|
| - |
Via: contains the IPv6 address or FQDN (fully qualified domain name)
of the originating UE.
|
| - |
Route: contains the P-CSCF address learnt during P-CSCF discovery,
plus the elements from the
Service-Route header from registration. The P-CSCF URI contains the port number learnt
during the security agreement negotiation.
|
| - |
P-Preferred-Identity: the user provides a hint about the identity
to be used for this session.
|
| - |
P-Access-Network-Info: the UE provides the access-type and access-info,
related to the serving access.
|
| - |
Privacy: the user does not require privacy,
therefore the Privacy header is set to the value "none" as
specified in RFC 3325 and RFC 3323.
|
| - |
Security-Verify: Contains the security agreement
as represented by the received Security-Server header.
|
|
|
|
|
|
|
|
| - |
S-CSCF#1 validates the service profile of this subscriber and evaluates the initial filter criterias. For
this example, assume no Application Server involvement.
|
| - |
S-CSCF#1 performs an analysis of the destination address, and determines the destination is on the
PSTN. S-CSCF forwards the INVITE request to the BGCF in the local network.
|
|
|
|
|
|
|
|
| - |
P-Charging-Vector:
The S-CSCF passes this header to the BGCF for charging.
|
| - |
P-Charging-Function-Addresses:
The S-CSCF inserts this header to provide the charging function addresses to the BGCF.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
