Content for TS 24.629 Word version: 18.0.0

1 Scope p. 6

The present document specifies the stage three (protocol description) of the Explicit Communication transfer (ECT) supplementary service, based on stage one and two of the ISDN ECT 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 is applicable to User Equipment (UE) and Application Servers (AS) which are intended to support the ECT 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 24.229: "Internet Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3".

[2]

RFC 3515: "The Session Initiation Protocol (SIP) Refer Method".

[3]

RFC 3892: "The Session Initiation Protocol (SIP) Referred-By Mechanism".

[4]

RFC 3891: "The Session Initiation Protocol (SIP) "Replaces" Header".

[5] Void.

[6]

RFC 3261: "SIP: Session Initiation Protocol".

[7]

TS 29.228: "IP Multimedia (IM) Subsystem Cx and Dx Interfaces; Signalling flows and message contents".

[7A]

TS 29.229: "Cx and Dx interfaces based on the Diameter protocol; Protocol details".

[8]

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

[9]

TS 24.605: "Conference (CONF) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".

[10]

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

[11]

ETSI TS 183 029 V2.5.0: "Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); PSTN/ISDN simulation services: Explicit Communication Transfer (ECT); Protocol specification".

[12]

TS 24.315: "IP Multimedia Subsystem (IMS) Operator Determined Barring (ODB); Stage 3".

[13]

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

[14]

RFC 6665: "SIP-Specific Event Notification".

[15]

RFC 4538: "Request Authorization through Dialog Identification in the Session Initiation Protocol (SIP)".

[16]

RFC 7647 (September 2015): "Clarifications for the Use of REFER with RFC6665".

3 Definitions and abbreviations p. 7

3.1 Definitions p. 7

For the purposes of the present document, the following terms and definitions apply:

ECT session identifier URI:

PSI created and inserted by an ECT AS that resolves to the AS itself

transferee:

party being transferred to the transfer target

transferor:

party initiating the transfer

transfer target:

party that the existing communication is transferred to

3.2 Abbreviations p. 7

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

ACR

Anonymous Communication Rejection

SIP Application Server

CDIV

Communication DIVersion

CONF

CONFerence

CSCF

Call Session Control Function

ECT

Explicit Communication Transfer

GRUU

Globally Routable User agent URI

HOLD

communication HOLD

IETF

Internet Engineering Task Force

IFC

Initial Filter Criteria

ISDN

Integrated Services Digital Network

MCID

Malicious Call IDentification

MGCF

Media Gateway Control Function

MiD

Multi-iDentity

MuD

Multi-Device

OCB

Outgoing Communication Barring

ODB

Operator Determined Barring

OIP

Originating Identification Presentation

OIR

Originating Identification presentation Restriction

PSAP

Public Safety Answering Point

PSTN

Public Switch Telephone Network

S-CSCF

Serving-CSCF

SIP

Session Initiation Protocol

TIP

Terminating Identification Presentation

TIR

Terminating Identification presentation Restriction

User Equipment