Content for TS 24.605 Word version: 18.0.0

1 Scope p. 6

The present document specifies the stage three Protocol Description of the Conference (CONF) service based on stage one and two of the ISDN CONF supplementary service. It provides the protocol details in the IP Multimedia (IM) Core Network (CN) subsystem based on the Session Initiation Protocol (SIP) and the Session Description Protocol (SDP).

The present document specifies centralized conferencing, using a conference focus, distributed conferencing is out of scope.

The present document does not cover the cases of :

cascading conference services; and
the support of the PSTN/ISDN conference service hosted in the PSTN.

The present document is applicable to User Equipment (UE) and Application Servers (AS) which are intended to support the CONF supplementary service.

2 References p. 6

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1]

TS 22.173: "IP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service and supplementary services; Stage 1".

[2]

TS 24.229: "Internet Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3".

[3] Void

[4] Void.

[5] Void.

[6] Void.

[7]

TS 24.147: "Conferencing using the IP Multimedia (IM) Core Network (CN) subsystem; Stage 3".

[8]

RFC 3891: "The SIP Replaces header".

[9] Void.

[10]

ETSI TS 183 043 V3.4.1 (2011-04):"Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IMS - based PSTN/ISDN Emulation; Stage 3 specification"

[11]

TS 24.628: "Common Basic Communication procedures using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".

[12]

TS 24.610: "Communication HOLD (HOLD) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".

[13]

RFC 7090 (April 2014): "Public Safety Answering Point (PSAP) Callback".

[14]

TS 24.166: "3GPP IMS Conferencing Management Object (MO)".

[15]

TS 23.003: "Numbering, addressing and identification".

[16]

RFC 3261 (June 2002): "SIP: Session Initiation Protocol".

3 Definitions and abbreviations p. 7

3.1 Definitions p. 7

For the purposes of the present document, the terms and definitions given in TS 22.173 and TS 24.147 apply.

3.2 Abbreviations p. 7

For the purposes of the present document, the following abbreviations apply:

ACR/CB

Anonymous Communication Rejection and Communication Barring

Application Server

CDIV

Communication DIVersion

CONF

CONFerence calling

Circuit Switch

ECT

Explicit Communication Transfer

HOLD

communication HOLD

IMS

IP Multimedia Subsystem

Internet Protocol

ISDN

Integrated Service Data Network

MCID

Malicious Communication IDentification

MGCF

Media Gateway Control Function

MiD

Multi-iDentity

MuD

Multi-Device

OIP

Originating Identification Presentation

OIR

Originating Identification Restriction

PSAP

Public Safety Answering Point

P-CSCF

Proxy CSCF

PSTN

Public Switched Telephone Network

SIP

Session Initiation Protocol

TIP

Terminating Identification Presentation

TIR

Terminating Identification Restriction

User Equipment