1、 ETSI TS 148 054 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Base Station Controller - Base Transceiver Station (BSC - BTS) interface; Layer 1 structure of physical circuits (3GPP TS 48.054 version 14.0.0 Release 14) TECHNICAL SPECIFICATION GLOBAL SYSTEM FOR MOBILE
2、 COMMUNICATIONSRETSI ETSI TS 148 054 V14.0.0 (2017-04)13GPP TS 48.054 version 14.0.0 Release 14Reference RTS/TSGR-0648054ve00 Keywords GSM ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Associat
3、ion but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print v
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9、ned by the GSM Association. ETSI ETSI TS 148 054 V14.0.0 (2017-04)23GPP TS 48.054 version 14.0.0 Release 14Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publi
10、cly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI
11、Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or m
12、ay become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These sh
13、ould be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “m
14、ay“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 148 054 V1
15、4.0.0 (2017-04)33GPP TS 48.054 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Abbreviations . 5g34 Layer 1 specification 6g3Annex A (informative): Change History 7g3History 8g3ETSI ETSI TS 148 054
16、V14.0.0 (2017-04)43GPP TS 48.054 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should
17、the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater in
18、dicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 148 054 V14.0.
19、0 (2017-04)53GPP TS 48.054 version 14.0.0 Release 141 Scope The use and general aspects of the A-bis interface are given in 3GPP TS 48.051. The present document defines the structure of the physical layer (layer 1) of the BSC - BTS/TRX interface for supporting traffic channels and control channels.
20、Use of the physical layer for supporting link protocol is covered in 3GPP TS 48.056. 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. 2 References The following documents contain provision
21、s 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,
22、 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 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 48.0
23、20: “Rate adaption on the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface“. 3 3GPP TS 48.051: “Base Station Controller - Base Transceiver Station (BSC - BTS) interface; General aspects“. 4 3GPP TS 48.056: “Base Station Controller - Base Transceiver Station (BSC - BTS) in
24、terface; Layer 2 specification“.“. 5 3GPP TS 48.060: “In-band control of remote transcoders and rate adaptors for full rate traffic channels“. 6 3GPP TS 48.061: “In-band control of remote transcoders and rate adaptors for half rate traffic channels“. 7 ITU-T Recommendation G.703: “Physical/electrica
25、l characteristics of hierarchical digital interfaces“. 8 ITU-T Recommendation G.705: “Characteristics of plesiochronous digital hierarchy (PDH) equipment functional blocks“. 9 ITU-T Recommendation G.711: “Pulse Code Modulation (PCM) of voice frequencies“. 10 ITU-T Recommendation G.732: “Characterist
26、ics of primary PCM multiplex equipment operating at 2 048 kbit/s“. 11 ITU-T Recommendation I.460: “Multiplexing, rate adaption and support of existing interfaces“. 3 Abbreviations For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 apply. ETSI ETSI TS 148 054 V14.0.0
27、(2017-04)63GPP TS 48.054 version 14.0.0 Release 144 Layer 1 specification All the ITU-T recommendations referred to are Blue Book. Layer 1 shall utilize digital transmission at a rate of 2 048 kbit/s with a frame structure of 32 x 64 kbit/s time slots, as specified in ITU-T Recommendation G.705 clau
28、se 3 or at a rate of 64 kbit/s. The physical/electrical characteristics are defined in ITU-T Recommendation G.703. Synchronization at the BTS/TRX for the transmitted bit stream toward the BSC shall be derived from the received bit stream from the BSC. For transmission rate at 64 kbit/sec it shall be
29、 an interface as defined in ITU-T Recommendation G.703. For transmission rate at 2 048 kbit/s the functional characteristics are defined in ITU-T Recommendation G.732 clauses 2 and 3, and fault conditions should be treated in accordance with ITU-T Recommendation G.732 clause 4. The idle pattern must
30、 be transmitted on every timeslot that is not assigned to a channel, and to every timeslot of a channel that is not allocated to a call. The idle pattern shall be 01010100 for a 64 kbit/s channel and the 2-bit pattern 01 for 16 kbit/s channels. For 8 kbit/s channels, the idle pattern shall be consec
31、utive ones or zeros according to the corresponding idle pattern bit of a 16 kbit/s channel. If transcoders are located in BTS speech encoding shall be the A-law as defined in ITU-T Recommendation G.711. If speech transcoders are located in the BSC the speech, data and signalling channels will utiliz
32、e transmission rates of 8 kbit/s, 16 kbit/s or 64 kbit/s according to 3GPP TS 48.060 and 3GPP TS 48.061. They shall be rate adapted or multiplexed according to ITU-T Recommendation I.460 with fixed format, to fit into the physical interface. Data encoding is covered in 3GPP TS 48.020. In the case of
33、 a 2 048 kbit/sec circuit, multidrop solutions should be possible. Dynamic sharing of terrestrial 64 kbit/sec channels between BTS:s on a per-call basis must not be used. ETSI ETSI TS 148 054 V14.0.0 (2017-04)73GPP TS 48.054 version 14.0.0 Release 14Annex A (informative): Change History TSG # TSG Do
34、c. CR Rev Subject/Comment New January 2016 - - - Rel-13 version created based on v12.0.0 13.0.0 Change history Date Meeting TDoc CR Rev Cat Subject/Comment New version 2017-03 75 Version for Release 14 (frozen at TSG-75) 14.0.0 ETSI ETSI TS 148 054 V14.0.0 (2017-04)83GPP TS 48.054 version 14.0.0 Release 14History Document history V14.0.0 April 2017 Publication
