Content for TS 29.013 Word version: 18.0.0

1 Scope p. 4

The scope of the present document is to provide a specification for interworking between the ISDN Application Service Element (ASE) protocol for supplementary services and the Mobile Application Part (MAP) protocol on MAP D-interface protocol for handling of supplementary services within the digital cellular telecommunications system (Phase 2+). This version of the specification includes the interworking for the Call Completion to Busy Subscriber (CCBS) service between the ISDN CCBS-ASE and MAP.

The MAP protocol for CCBS service is specified in GSM 09.02 [6]. The ISDN CCBS-ASE protocol is specified in ETS 300 356 18 [9]. The ISDN CCBS-ASE protocol is also commonly referred to as the SSAP protocol in GSM 03.93 [3]. This specification clarifies the interworking within the HLR between these protocols for the Call Completion to Busy Subscriber (CCBS) service.

Clause 4 describes the mapping between MAP application layer messages and SSAP application layer messages.

Clause 5 describes the mapping between MAP message parameters and SSAP message parameters.

Clause 6 describes the dialogue handling on the SSAP interface.

Clause 7 describes the SCCP layer addressing for messages on the SSAP interface.

2 References p. 4

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.

[1]

GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms".

[2]

GSM 02.93: "Digital cellular telecommunications system (Phase 2+); Completion of calls to busy subscriber (CCBS) supplementary services - Stage 1".

[3]

GSM 03.93: "Digital cellular telecommunications system (Phase 2+); Technical Realisation of Completion of Calls to Busy Subscriber (CCBS); Stage 2".

[4]

GSM 04.80: "Digital cellular telecommunications system (Phase 2+); Mobile radio interface layer 3 supplementary services specification Formats and coding".

[5]

GSM 04.93: "Digital cellular telecommunications system (Phase 2+); Technical Realisation of Completion of Calls to Busy Subscriber (CCBS); Stage 3".

[6]

GSM 09.02: "Digital cellular telecommunications system (Phase 2+); Mobile Application Part (MAP) specification".

[7]

GSM 09.07 : "Digital cellular telecommunications system (Phase 2+); General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)".

[8]

ETS 300 102-1 (1990): "Integrated Services Digital Network (ISDN); User-network interface layer 3 specifications for basic call control".

[9]

ETS 300 356-18: "ISDN User Part (ISUP) version 2 for the international interface: Part 18: Completion of Calls to Busy Subscriber (CCBS) supplementary service".

[10]

ETS 300 358: "Integrated Services Digital Network (ISDN); Completion of Calls to Busy Subscriber (CCBS) supplementary service; Functional capabilities and information flows".

3 Definitions and abbreviations p. 5

3.1 Definitions p. 5

For the purposes of this specification, the following definitions apply:

SSAP:

Supplementary Service Application Part. SSAP is the protocol used for CCBS procedures on the interface between the originating and destination network. Communication across this interface is performed using SCCP Connectionless Signalling (Refer to ETS 300 358 [10]). The terms CCBS-ASE defined in ETS 300 356-18 [9] for the ISDN CCBS service and SSAP defined in GSM 03.93 [3] are the same and are used interchangeably in this specification. The SSAP interface is between the originating network entities (HLR A, OLE) and the destination network entities (HLR B, DLE).

3.2 Abbreviations p. 5

Abbreviations used in this specification are listed in GSM 01.04 [1].

For the purposes of this specification, the following abbreviations apply:

ASE

Application Service Element

CCBS

Call Completion to Busy Subscriber

DLE

Destination Local Exchange

ISDN

Integrated Services Digital Network

MAP

Mobile Application Part

OLE

Originating Local Exchange

SCCP

Signalling Connection Control Part

SSAP

Supplementary Service Application Part

Transaction Capabilities