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TS 23.218  CT1 ★
IP Multimedia (IM) Session Handling –
IM Call Model

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V15.0.0 (PDF)  2018/06  74 p.
V14.0.0  2017/03  76 p.
V13.0.0  2015/03  74 p.
V12.3.0  2013/09  75 p.
V11.6.0  2013/06  75 p.
V10.0.0  2011/03  68 p.
V9.2.0  2010/06  68 p.
V8.6.0  2010/03  68 p.
V7.10.0  2009/12  62 p.
V6.4.0  2006/06  59 p.
V5.9.0  2006/06  59 p.
Rapporteur:  Mr. Leis, Peter
This TS specifies the IP Multimedia (IM) Call Model for handling of an IP multimedia session origination and termination for an IP Multimedia subscriber.
This TS includes interactions between an Application Server and IP multimedia sessions.

full Table of Contents for  TS 23.218  Word version:   15.0.0

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1 Scope  2 References  3 Definitions and abbreviations  4 Architecture and information flows for IM multimedia session  5 Functional requirements of network entities  6 Functional requirements of serving CSCF and Transit Function  7 Functional requirements of HSS  8 Functional requirements of the MRFC  9 Generic IP multimedia session handling for SIP Application Servers  10 IP multimedia session handling with IM-SSF Application Server  11 IP multimedia session handling with an OSA-Service Capability Server  12 IP multimedia session handling with an Charging Server  13 Media resource broker (MRB)  A Scalability and deployment considerations for IP multimedia service provision  B Information flows for example services  C Example for Initial filter criteria triggering  D Change history 

 

1  Scope  Word-p. 7
2  References
3  Definitions and abbreviations  Word-p. 8
3.1  Definitions
3.2  Abbreviations  Word-p. 9
4  Architecture and information flows for IM multimedia session  Word-p. 11
4.0  Introduction [R7]
4.1  Architecture for a UE-originating IP multimedia session
4.2  Architecture for a UE-terminating IP multimedia session
4.3  Void
4.4  Void
4.5  Void
5  Functional requirements of network entities  Word-p. 12
5.1  Architecture for service provision for IP multimedia subsystem  Up
5.1.1  General [R11]
5.1.2  Provision of media resources [R11]  Word-p. 13
5.1.2A  Border control concepts for the ISC interface [R11]
5.1.3  Border control concepts for other interfaces [R11]  Word-p. 14
5.1A  IMS communication service identifier (ICSI) [R7]  Word-p. 15
5.1B  IMS Application Reference Identifier (IARI) [R7]  Word-p. 16
5.2  Service interaction with IP multimedia subsystem
5.2.1  Service Point Triggers (SPTs) [R8]
5.2.2  Filter Criteria [R8]
5.2.3  S-CSCF Filter Criteria processing [R8]  Word-p. 17
5.2.4  Transit Invocation Criteria [R11]  Word-p. 18
5.2.5  Transit Function Transit Invocation Criteria processing [R11]
6  Functional requirements of serving CSCF and Transit Function  Word-p. 20
6.1  Modes of operation of the S-CSCF and Transit Function
6.1.1  General overview of functional models and modes of operation of the S-CSCF
6.1.2  General overview of functional models and modes of operation of the Transit Function [R11]  Word-p. 21
6.2  Interfaces defined for S-CSCF and Transit Function  Word-p. 22
6.2.1  S-CSCF - CSCF (Mw) interface
6.2.2  S-CSCF - Application Server (ISC) interface
6.2.3  S-CSCF - HSS (Cx) interface  Up
6.2.4  S-CSCF - MRB (ISC) interface [R8]
6.2.5  S-CSCF - MRF (Mr) interface [R11]
6.2.6  Transit Function - Application Server (ISC) interface [R11]
6.3  S-CSCF handling of SIP registration
6.4  S-CSCF handling of UE-originating requests  Word-p. 23
6.4.1  S-CSCF handling of UE-originating requests, registered user [R7]
6.4.2  S-CSCF handling of UE-originating requests, unregistered user [R7]  Word-p. 24
6.5  S-CSCF handling of UE-terminating requests  Word-p. 25
6.5.1  S-CSCF handling of UE-terminating requests, registered user
6.5.2  S-CSCF handling of UE-terminating requests, unregistered user  Word-p. 26
6.5A  Transit Function handling of requests [R11]  Word-p. 27
6.5A.1  Transit Function handling of initial requests and standalone requests
6.6  S-CSCF and Transit Function handling of IP multimedia session release requests  Word-p. 28
6.6.0  Introduction [R7]
6.6.1  S-CSCF and Transit Function proxying release request
6.6.2  S-CSCF and Transit Function initiating release request
6.7  S-CSCF handling of subscription and notification  Word-p. 29
6.8  S-CSCF handling IMS charging
6.8A  Transit Function handling IMS charging [R11]  Word-p. 30
6.9  S-CSCF description of subscriber data  Word-p. 31
6.9.1  Application Server subscription information
6.9.2  Filter Criteria
6.9.2.0  Introduction [R7]
6.9.2.1  Application Server address
6.9.2.2  Default handling
6.9.2.3  Trigger point
6.9.2.4  iFC Priority
6.9.2.5  Service Information
6.9.2.6  Include Register Request [R8]  Word-p. 32
6.9.2.7  Include Register Response [R8]  Up
6.9.3  Authentication data
7  Functional requirements of HSS
7.1  Subscriber data related storage requirements for HSS
7.2  Interfaces defined for HSS
7.2.1  HSS - CSCF (Cx) interface
7.2.2  HSS - Application Server (Sh) interface  Word-p. 33
7.2.3  HSS - CSE interface
7.2.4  HSS - IM-SSF Application Server interface
7.3  Procedures during IP multimedia registration
7.4  Procedures during IP multimedia sessions  Up
8  Functional requirements of the MRFC
8.1  Functionality of the MRFC
8.1.1  Overview of MRFC Functionality
8.1.2  Tones and announcements  Word-p. 34
8.1.3  Ad-hoc conferences (multiparty calls)
8.1.4  Transcoding  Word-p. 35
8.2  Interfaces defined for MRFC
8.2.1  MRFC - S-CSCF (Mr) interface
8.2.2  Application Server - MRFC (Cr) interface [R8]
8.2.3  Application Server - MRFC (Mr') interface [R9]  Word-p. 36
8.2.4  MRB - MRFC (Mr') interface [R11]
8.2.5  MRB - MRFC (Cr) interface [R11]
9  Generic IP multimedia session handling for SIP Application Servers  Word-p. 37
9.1  Architecture
9.1.0  Introduction [R7]
9.1.1  Modes of operation between Application Server and S-CSCF  Word-p. 38
9.1.1.0  Introduction [R7]
9.1.1.1  Application Server acting as terminating UA, or redirect server
9.1.1.2  Application Server acting as originating UA  Word-p. 39
9.1.1.3  Application Server acting as a SIP proxy  Up
9.1.1.4  Application Server performing third party call control/ B2BUA mode
9.1.1.5  Application Server not involved or no longer involved  Word-p. 41
9.1.2  Modes of operation between Application Server and Transit Function [R11]
9.2  Interfaces defined for a SIP Application Server
9.2.1  S-CSCF - Application Server (ISC) interface
9.2.2  Application Server - HSS (Sh) interface
9.2.3  Application Server - SLF (Dh) interface [R6]
9.2.4  Application Server - MRFC (Cr) interface [R8]
9.2.5  Application Server - MRB interface (Rc) [R8]
9.2.6  Transit Function - Application Server (ISC) interface [R11]  Word-p. 42
9.3  Description of Application Server related subscriber data
9.3.1  Application server subscription information
9.3.1.0  Introduction [R7]
9.3.1.1  Service key
9.3.1.2  Service platform trigger points (STP)
9.3.1.3  Service scripts
9.4  Procedures for multimedia session handling with a SIP based Application Server
9.4.1  Application Server handling of UE-originating requests
9.4.2  Application Server handling of UE-terminating requests  Word-p. 43
9.4.3  Application Server handling of SIP registration  Up
9.4.4  Application Server handling of IP multimedia session release requests
9.4.4.1  Session release request terminated at the Application Server
9.4.4.2  Session release request proxied by the Application Server  Word-p. 44
9.4.4.3  Session release request initiated by the Application Server
9.4.5  Application server handling of IP multimedia charging  Word-p. 45
10  IP multimedia session handling with IM-SSF Application Server
11  IP multimedia session handling with an OSA-Service Capability Server
12  IP multimedia session handling with an Charging Server
13  Media resource broker (MRB) [R8]  Word-p. 46
13.0  General [R11]  Up
13.1  MRB Query Mode  Word-p. 47
13.2  MRB In-Line Mode  Word-p. 48
13.3  MRB knowledge of MRF resources and other information
A  Scalability and deployment considerations for IP multimedia service provision  Word-p. 49
B  Information flows for example services  Word-p. 51
B.1  Call forwarding example
B.1.1  Call forwarding through Application Servers
B.1.1.0  Introduction [R7]
B.1.1.1  Service activation and programming  Word-p. 52
B.1.1.2  Service invocation and control  Up
B.1.2  Assumptions  Word-p. 53
B.1.3  UE redirect based call flows
B.1.4  S-CSCF based redirect call flows  Word-p. 54
B.2  Announcement, conferencing and transcoding examples using MRFC  Word-p. 56
B.2.1  Example information flow for a UE-originating IP multimedia session that results in playing an announcement
B.2.2  Example information flow for a UE-originating IP multimedia ad-hoc conferencing session (multiparty call)  Word-p. 58
B.2.3  Example information flows for a UE-originating IP multimedia session that requires transcoding  Word-p. 60
B.3  Example information flows for a voicemail service  Word-p. 64
B.3.1  User out of coverage message recording
B.3.2  User IMS registers voice mail service plays back messages  Word-p. 66
C  Example for Initial filter criteria triggering  Word-p. 69
D  Change history  Word-p. 71

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