1、 ETSI TS 148 002 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Base Station System - Mobile-services Switching Centre (BSS - MSC) interface; Interface principles (3GPP TS 48.002 version 14.0.0 Release 14) TECHNICAL SPECIFICATION GLOBAL SYSTEM FOR MOBILE COMMUNICATION
2、SRETSI ETSI TS 148 002 V14.0.0 (2017-04)13GPP TS 48.002 version 14.0.0 Release 14Reference RTS/TSGR-0648002ve00 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 Association but non lu
3、cratif 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 versions of the
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9、 Association. ETSI ETSI TS 148 002 V14.0.0 (2017-04)23GPP TS 48.002 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 publicly available
10、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 Web server (ht
11、tps:/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 may become, ess
12、ential 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 should be interp
13、reted 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“, “may“, “need not
14、“, “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 148 002 V14.0.0 (2017-04
15、)33GPP TS 48.002 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope 6g32 References 7g33 Definitions and abbreviations . 7g34 Functional division between Base Station System (BSS) and MSC 8g34.1 Terrestrial channel managem
16、ent . 8g34.1.1 Terrestrial channel allocation 8g34.1.2 Blocking of terrestrial channels 9g34.2 Radio channel management 9g34.2.1 Channel configuration management . 9g34.2.2 Radio TCH management 9g34.2.2.1 Radio channel allocation . 9g34.2.2.2 TCH radio link supervision . 9g34.2.2.3 Frequency hopping
17、 management 9g34.2.2.4 Idle channel observation . 9g34.2.2.5 TCH power control . 10g34.2.2.6 TCH channel release . 10g34.2.3 BCCH CCCH management 10g34.2.3.1 Scheduling of BCCH and CCCH messages 10g34.2.4 DCCH Management . 10g34.2.4.1 DCCH link supervision . 10g34.2.4.2 DCCH channel release 10g34.2.
18、4.3 DCCH power control 10g34.2.4.4 Radio Channel Allocation . 10g34.3 Resource indication 10g34.4 Channel coding decoding . 10g34.5 Transcoding/rate adaptation . 11g34.6 Interworking function (data calls) 11g34.7 Measurement information 11g34.7.1 Measurement information reported from the MS . 11g34.
19、7.2 Uplink measurement information . 11g34.7.3 Traffic information . 11g34.8 Handover 11g34.8.1 Internal handover within one cell . 11g34.8.2 Internal handover between cells 11g34.8.3 External handover . 12g34.8.3.1 Recognition that a handover is required for a radio reason . 12g34.8.3.2 Recognition
20、 that a handover is required for a traffic reason . 12g34.8.3.3 Decision of Target Cell . 12g34.8.3.4 Execution 12g34.9 Mobility management . 12g34.10 Call control . 12g34.11 Security features . 12g34.11.1 User data confidentiality . 12g34.11.2 User identity confidentiality . 13g34.11.3 Signalling i
21、nformation confidentiality 13g34.11.4 Authentication of users . 13g34.12 Global Text Telephony . 13g34.13 NAS Node Selection Function . 13g35 Transcoder/rate adapter integration 13g3ETSI ETSI TS 148 002 V14.0.0 (2017-04)43GPP TS 48.002 version 14.0.0 Release 145.1 TDM based A-Interface 13g35.2 IP ba
22、sed A-Interface . 13g36 Multiplexing of common and dedicated control channels 14g37 Classes of signalling messages . 14g38 Support of services and features other than speech 14g38.1 Data services 14g38.2 Supplementary services 14g39 Interface structures . 14g310 Operation and maintenance 15g3Annex A
23、 (informative): Remote Mobile Switching Unit (RMSU) 16g3A.1 Introduction 16g3A.2 Functions provided by the RMSU 16g3A.3 General requirements . 16g3Annex B: (void) 17g3Annex C (informative): Change History 18g3History 19g3ETSI ETSI TS 148 002 V14.0.0 (2017-04)53GPP TS 48.002 version 14.0.0 Release 14
24、Foreword 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 the TSG modify the contents of the present document, it wi
25、ll 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 indicates TSG approved document under change control. y the
26、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 148 002 V14.0.0 (2017-04)63GPP TS 48.002 version 14.0.0 Release 141 Scop
27、e The present document gives the principles on which the detailed interface specifications in the rest of the 3GPP TS 48.0xx series of Technical Specifications are based. The set of fixed equipment accessed from the MSC through one particular instance of the interface will be later referred to as a
28、Base Station System (BSS). A BSS ensures the coverage of n cells, where n can be 1 or more. The function of a BSS may be further subdivided into a control function, performed by one Base Station Controller (BSC) and a transceiving function, performed by “n“ Base Transceiver Station equipments (BTS),
29、 one for each cell. However, the study of such a split is outside the scope of the 48.0xx series of Technical Specifications, where the BSS will be considered as a whole. The BSS-MSC interface defined in the 3GPP TS 48 series of Technical Specifications is designed to support a wide range of possibl
30、e architectures on both sides. Characteristics like location of the transcoders/rate adaptation to the MSS or inside the BSS (either physically integrated into the transceivers or very near to the MSC) or the use of traffic or signalling concentration at either side are left to the operators choice.
31、 Annex A to the present document contains guidance information concerning the use of remote mobile switching units, which for the purposes of the present document are considered as part of the MSC. The BSS-MSC interface is commonly called “A-Interface”. It is subdivided into the Control Plane (signa
32、lling) and the User Plane (traffic). Throughout this document the term “MSC” is used to reflect both planes of the Mobile Core Network, although in some architecture the Mobile Core Network is split into MSC-Server (MSC-S) and Media Gateway (MGW). Direct connection between two BSSs is not supported
33、by this A-Interface. This A-Interface may be based on - TDM using 1 or more 2 048 kbit/s digital transmission system interfaces. Each 2 048 kbit/s interface provides 31*64 kbit/s channels which can be used for traffic (User Plane) or signalling (Control Plane) as the operator requires, and/or - IP s
34、upporting User Plane and/or Control Plane (SIGTRAN).The signalling is layered, terminology similar to that in the OSI reference model is used in this series, however the layers referred to are not identical to the equivalently named layer in the OSI model. This A-Interface User Plane is defined at t
35、he boundary of the MSC and - in case of TDM, it has a per channel bit rate of 64 kbit/s, but the net radio path traffic channel is at a rate of less than 16 kbit/s. A speech transcoder or data rate adapter function is thus needed for the rate conversion. The interface is designed such that the trans
36、coding or rate adaptation function may be geographically situated at either the MSC site or the BSS site, however the transcoder is considered to be part of the BSS - in case of IP, it has a flexible channel bit rate, adapted to the payload size. The speech transcoding function can be part of either
37、 the BSS or the Core Network or can be omitted (transcoding free operation), allowing e.g. for use of both, PCM encoded speech and compressed speech, over the A-Interface. The data rate adapter function is always located inside the BSS, using a 64kbit/s unrestricted digital interface (Clearmode) ove
38、r IP. The A-Interface has been designed around the aims of 3GPP TS 48.001 allowing each component and the system as a whole to evolve. ETSI ETSI TS 148 002 V14.0.0 (2017-04)73GPP TS 48.002 version 14.0.0 Release 142 References The following documents contain provisions which, through reference in th
39、is 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
40、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 TS 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 23.009: “Handover procedures“. 3 3GP
41、P TS 23.910: “Circuit switched data bearer services“. 4 3GPP TS 43.020: “Security related network functions“. 5 3GPP TS 44.018: “Mobile radio interface layer 3 specification; Radio Resource Control Protocol“. 6 3GPP TS 48.001: Base Station System - Mobile services Switching Centre (BSS - MSC) interf
42、ace; General aspects“. 7 Void. 8 3GPP TS 48.006: “Signaling transport specification mechanism for the Base Station Subsystem Mobile-services Switching Centre (BSS - MSC) interface“. 9 3GPP TS 48.008: “Mobile-services Switching Centre Base Station System (MSC-BSS) interface; Layer 3 specification“. 1
43、0 Void. 11 Void. 12 Void. 13 Void. 14 Void. 15 Void. 16 Void. 17 Void. 18 3GPP TS 52.001: “Common aspects of GSM Network Management (NM)“. 19 3GPP TS 23.236: “ Intra-domain connection of Radio Access Network (RAN) nodes to multiple Core Network (CN) nodes “. 3 Definitions and abbreviations Abbreviat
44、ions used in the present document are listed in 3GPP TS 21.905. ETSI ETSI TS 148 002 V14.0.0 (2017-04)83GPP TS 48.002 version 14.0.0 Release 144 Functional division between Base Station System (BSS) and MSC Table 4: Functional split Item/Task BSS MSC,MGW,VLR,HLR Terrestrial Channel Management channe
45、l allocation X X blocking indication X X Radio channel management Radio channel configuration management X frequency hopping management X idle channel observation X power control X TCH management channel allocation (choice) X link supervision X channel release X X (Invoked by MSC) BCCH/CCCH manageme
46、nt scheduling of messages X DCCH management link supervision X channel release X X (Invoked DCCH allocation X by MSC Radio resource indication report status of idle channels X Channel coding decoding MSC defines on the basis of call type X call type Speech Transcoding X X Data rate adaptation X Inte
47、rworking Function (data calls) X Measurements reported from MS X uplink X traffic X Handoverinternal (within one cell)if provided X MSC informed internal (between cells) if provided X MSC informed external recognition radio reason X external recognition traffic reason X X decision X X execution X Mo
48、bility Management authentication X location updating X paging X DRX paging (scheduling) X Call control X User data encryption X Key and permitted algorithms from MSC Signalling element encryption X Key and permitted algorithms from MSC NNSF (NAS Node Selection Function) X 4.1 Terrestrial channel man
49、agement 4.1.1 Terrestrial channel allocation Terrestrial channel allocation will be handled in the following manner. ETSI ETSI TS 148 002 V14.0.0 (2017-04)93GPP TS 48.002 version 14.0.0 Release 14In case of TDM links, the link between the MSC and the BSS will be considered by the BSS and the MSC as a route on “n“ circuits. Within this route, certain of the circuits may not be able to support all types of traffic (e.g., data calls or half rate connections). This can be managed, according to the configuration, ei
