TS 48.004
BSS-MSC Interface –
Layer 1 specification
V18.0.0 (PDF)
2024/03 9 p.
V17.0.0
2022/03 9 p.
V16.0.0
2020/06 9 p.
V15.0.0
2018/06 9 p.
V14.0.0
2017/03 9 p.
V13.0.0
2016/01 9 p.
V12.0.0
2014/09 9 p.
V11.0.0
2012/09 9 p.
V10.0.0
2011/04 9 p.
V9.0.0
2009/12 9 p.
V8.0.0
2008/12 9 p.
V7.0.0
2007/09 9 p.
V6.0.0
2005/02 9 p.
V5.0.1
2002/12 9 p.
V4.0.0
2001/05 9 p.
GSM Rel-99 v8.0.1
2002/06 9 p.
GSM Rel-98 v7.0.1
1999/08 8 p.
GSM Rel-97 v6.0.0
1998/10 8 p.
GSM Rel-96 v5.0.0
1996/10 9 p.
GSM Phase-2 v4.0.3
1994/09 9 p.
GSM Phase-1 v3.0.3
1992/02 5 p.
- Rapporteur:
- Mr. Andersen, Niels Peter Skov
Anemone Technology
Content for TS 48.004 Word version: 18.0.0
1 Scope p. 5
The present document defines the structure of the physical layer (layer 1) of the BSS-MSC interface for supporting traffic channels. Use of the physical layer for supporting Signalling System No.7 signalling links is covered in Technical Specification TS 48.006.
The physical layer is the lowest layer in the OSI Reference Model and it supports all functions required for transmission of bit streams on the physical medium.
For the present document only digital transmission will be considered, the use of analogue transmission is a national concern.
2 References p. 5
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]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
ITU-T Recommendation G.705: "Characteristics of plesiochronous digital hierarchy (PDH) equipment functional blocks".
[3]
ITU-T Recommendation G.709: "Interfaces for the Optical Transport Network (OTN)".
[4]
ITU-T Recommendation G.711: "Pulse Code Modulation (PCM) of voice frequencies".
[5]
ITU-T Recommendation G.732: "Characteristics of primary PCM multiplex equipment operating at 2 048 kbit/s".
[6]
TS 48.006: "Signalling transport mechanism specification for the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface".
[7]
ANSI T1.102-1993: "Digital Hierarchy - Electrical Interface".
[8]
ANSI T1.403.01-1999: "Title: Network and Customer Installation Interfaces - (ISDN) Primary Rate Layer 1 Electrical Interfaces Specification (Includes revision of ANSI T1.408-1990 and partial revision of ANSI T1.403-1995)".
[9]
ANSI T1.107-1995: "Digital Hierarchy - Formats Specifications".
[10]
TS 48.020: "Rate adaption on the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface".
3 Abbreviations p. 5
For the purposes of the present document, the abbreviations gieven in TR 21.905 apply.
4 Layer 1 Specification p. 6
All ITU-T recommendations referred to are Blue Book.
Layer 1 shall utilise digital transmission:
- at a rate of 2048 kbit/s with a frame structure of 32 x 64kbit/s time slots, as specified in ITU-T Recommendation G.705 clause 3 for E1 interface; or
- at a rate of 1544 kbit/s with a frame structure of 24 x 64 kbit/s time slots, as specified in T1.102 specification for T1 interface.
$ Change History p. 7
