1、 ETSI TR 123 910 V4.9.1 (2005-06)Technical Report Universal Mobile Telecommunications System (UMTS);Circuit switched data bearer services(3GPP TR 23.910 version 4.9.1 Release 4)ETSI ETSI TR 123 910 V4.9.1 (2005-06) 1 3GPP TR 23.910 version 4.9.1 Release 4 Reference RTR/TSGC-0323910v491 Keywords UMTS
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6、ssion. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade M
7、arks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TR 123 910 V4.9.1 (2005-06) 2 3GPP TR 23.910 version 4.9.1 Release 4 Intellectual Property Rights IPRs e
8、ssential 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 for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or poten
9、tially 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 (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried o
10、ut 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, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI 3rd Generation Partn
11、ership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI id
12、entities can be found under http:/webapp.etsi.org/key/queryform.asp . ETSI ETSI TR 123 910 V4.9.1 (2005-06) 3 3GPP TR 23.910 version 4.9.1 Release 4 Contents Intellectual Property Rights2 Foreword.2 Foreword.4 1 Scope 5 2 References 5 3 Definitions and abbreviations.6 3.1 Definitions6 3.2 Abbreviati
13、ons .6 4 General .7 4.1 Limited set of UMTS PLMN connection models.7 4.1.1 Transparent data7 4.1.2 Non-transparent data.9 5 Bearer Capabilities for UMTS Data Services 9 5.1 Bearer Capabilities for UMTS Data Services.9 5.1.1 Transparent Data.9 5.1.2 Non-Transparent Fax 10 5.1.3 NT Data 10 5.1.4 Trans
14、parent Data for Support of Multimedia10 5.2 BC-IE to RAB QoS Mapping.10 5.2.1 Non-transparent services, including Fax.11 5.2.2 Transparent Data, including Multimedia 11 6 Iu and Nb User Plane12 6.1 NT services.12 6.2 T services12 6.2.1 Avoidance of delay at RNC 12 6.2.2 Recovery from the loss of ATM
15、 cells.12 7 RLC 13 8 Initial Synchronisation and resynchronisation .13 8.1 Modem services (3.1 kHz audio)13 8.1.1 Transparent Case 13 8.1.2 Non-Transparent Case 13 8.2 Digital services.14 8.2.1 Transparent case .14 8.2.2 Non-Transparent case .14 8.3 Loss of synchronisation14 9 Call Control14 10 Hand
16、over Issues .14 10.1 Signalling issues.14 10.1.1 Loss of BC Information during Handover from GSM to UMTS14 10.1.2 Handover from UMTS to GSM 14 10.2 User Plane 15 10.2.1 Handover from UMTS to GSM 15 10.2.2 Handover from GSM to UMTS 15 10.2.2.1 Frame layout for the different transparent user rates.15
17、10.2.2.2 A-TRAU frame format 16 10.2.3 Handover within 3G PLMNs18 10.2.4 Handover for 56 kbit/s 18 Annex A: Change history 19 History 20 ETSI ETSI TR 123 910 V4.9.1 (2005-06) 4 3GPP TR 23.910 version 4.9.1 Release 4 Foreword This Technical Report (TR) has been produced by the 3rdGeneration Partnersh
18、ip 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 will be re-released by the TSG with an identifying change of release date and an increase
19、 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 second digit is incremented for all changes of substance, i.e. technical enhancements,
20、corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TR 123 910 V4.9.1 (2005-06) 5 3GPP TR 23.910 version 4.9.1 Release 4 1 Scope The present document provides an overview of the architecture and issues related to t
21、he provision of Circuit Switch Bearer Services in a 3G mobile network. 2 References 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, vers
22、ion 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
23、 document in the same Release as the present document. 1 3GPP TS 43.010: “GSM Public Land Mobile Network (PLMN) connection types“. 2 3GPP TR 21.905: “Vocabulary for 3GPP Specifications “. 3 3GPP TS 22.100: “UMTS phase 1“. 4 3GPP TS 22.002: “Circuit Bearer Services (BS) supported by a Public Land Mob
24、ile Network (PLMN)“. 5 3GPP TS 22.101: “Service principles“. 6 3GPP TS 22.105: “Services and service capabilities“. 7 3GPP TS 23.002: “Network architecture“. 8 3GPP TS 23.034: “High Speed Circuit Switched Data (HSCSD) -Stage 2“. 9 3GPP TS 23.101: “General UMTS Architecture“. 10 3GPP TS 23.107: “Qual
25、ity of Service (QoS), concept and architecture“. 11 3GPP TS 24.022: “Radio Link Protocol (RLP) for circuit switched bearer and teleservices “. 12 3GPP TS 25.322: “Radio Link Control (RLC) protocol specification“. 13 3GPP TS 25.415: “UTRAN Iu Interface user plane protocols“. 14 3GPP TS 27.001: “Gener
26、al on Terminal Adaption Functions (TAF) for Mobile Station (MS)“. 15 3GPP TS 29.007: “General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)“. 16 ITU-T Recommendation V.90: “A d
27、igital modem and analogue modem pair for use on the Public Switched Telephone Network (PSTN) at data signalling rates of up to 56 000 bit/s downstream and up to 33 600 bit/s upstream“. 17 ITU-T Recommendation T.30 “Procedures for document facsimile transmission in the general switched telephone netw
28、ork“. 18 3GPP TS 44.021: “Rate adaption on the Mobile Station - Base Station System (MS - BSS) interface“. 19 3GPP TS 48.020: “Rate adaption on the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface“. 20 ITU-T Recommendation I.366.1: “Segmentation and Reassembly Service Spe
29、cific Convergence Sublayer for the AAL type 2“. ETSI ETSI TR 123 910 V4.9.1 (2005-06) 6 3GPP TR 23.910 version 4.9.1 Release 4 21 ITU-T Recommendation Q.2630.1: “AAL type 2 signalling protocol (Capability Set 1)“. 22 3GPP TS 29.415: “Customized Applications for Mobile network Enhanced Logic (CAMEL)
30、Phase 3; CAMEL Application Part (CAP) specification“. 23 ITU-T Recommendation I.363.2: “B-ISDN ATM Adaptation Layer specification : Type 2 AAL“. 24 ITU-T Recommendation I.460: “Multiplexing, rate adaption and support of existing interfaces“. 25 ITU-T Recommendation I.366.2: “AAL type 2 service speci
31、fic convergence sublayer for narrow-band services“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, terms and definitions given in 3GPP TR 21.905 2 apply. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AAL2 ATM
32、 Adaptation Layer 2 AIUR Air Interface User Rate ATM Asynchronous Transmission Mode BC Bearer CapabilityBS Bearer Service BSSMAP Base Station System Mobile Application Protocol CE Connection Element CN Core Network CS Circuit Switched CT Circuit DCE Data Communication Equipment DTE Data Terminal Equ
33、ipment DTX Discontinuous Transmission IE Information Element ITC Information Transfer Capability IWF Interworking Function MAP Mobile Application Protocol MSC Mobile Services Switching Centre MT Mobile Termination NT Non-transparent QoS Quality of Service RAB Radio Access Bearer RDI Restricted Digit
34、al Information RLC Radio link control RLP Radio link protocol RNL Radio Network Layer SAP Service Access Point SSCS Service Specific Convergence Sublayer SDU Service Data Unit T Transparent TAF Terminal Adaption Function TE Terminal UDI Unrestricted Digital Information UE User Equipment UP User Plan
35、e VLR Visiting Location Register WAIUR Wanted Air Interface User Rate ETSI ETSI TR 123 910 V4.9.1 (2005-06) 7 3GPP TR 23.910 version 4.9.1 Release 4 4 General CS data services in UMTS (UMTS Bearer Services) are build on services provided by the Access Network. These Radio Access Bearer Services are
36、invoked through the RNL-SAP provided by the Iu User Plane to the Non-access stratum on the Core Network side, and the corresponding SAP provided by the RLC to the Non-access stratum on the Terminal side. Transport within the CN (the CN Bearer services) is outside the scope of the present document. I
37、nterworking with External Bearer services is within the scope of the present document. (see figure 1). TE MT UTRANCN IuEDGENODECNGatewayTEUMTSEnd-to-End ServiceTE/MT LocalBearerUMTS Bearer Service ExternalBearerRadio Access Bearer Service CN BearerServiceBackboneBearerIu BearerServiceRadioBearerUTRA
38、FDD/TDDServicePhysicalBearerServiceFigure 1: Service architecture 4.1 Limited set of UMTS PLMN connection models 4.1.1 Transparent data Figure 2 shows the connection model for synchronous transparent CS data. In general all the user data bits are conveyed between the MT and the IWF as they are recei
39、ved from the TE. This implies that the RLC SDU/ Iu UP frame is transparent. Figure 3 shows the connection model for asynchronous transparent CS data. The rate adaptation function RA0 from 3GPP TS 44.021 18 (adapted to the RLC SDU size) is used for converting between asynchronous data and a synchrono
40、us bit stream. End-to-end flow control is not applicable in UMTS, thus no status bits are conveyed over RAN/UTRAN (see 3GPP TS 27.001 14). ETSI ETSI TR 123 910 V4.9.1 (2005-06) 8 3GPP TR 23.910 version 4.9.1 Release 4 I/Fcct I/Fcct CDMA CDMA MAC Iu UP Iu UP MAC ATM ATM Modem Codec ISDN TA R I/F Uu I
41、u TE MT RNC MSC/IWF Transparent Synchronous Data RLC RLC AAL2 AAL2 No IWF Figure 2: Connection model for Synchronous T CS data I/Fcct I/Fcct CDMA CDMA MAC Iu UP Iu UP MAC ATM ATM Modem Codec ISDN TA R I/F Uu Iu TE MT RNC MSC/IWF Transparent Asynchronous Data RLC RLC AAL2 AAL2 RA0 RA0 Figure 3: Conne
42、ction model for Asynchronous T CS data ETSI ETSI TR 123 910 V4.9.1 (2005-06) 9 3GPP TR 23.910 version 4.9.1 Release 4 4.1.2 Non-transparent data Figure 4 shows the connection model for asynchronous non-transparent CS data. I/Fcct I/Fcct CDMA CDMA MAC Iu UP Iu UP MAC ATM ATM Modem Codec ISDN TA R I/F
43、 Uu Iu TE MT RNC MSC/IWF Non-transparent Asynchronous Data RLC RLC AAL2 AAL2 L2R RLP L2R RLP Figure 4: Connection model for Asynchronous NT CS data 5 Bearer Capabilities for UMTS Data Services The UMTS bearer services are described by the UMTS BC-IE. Five services (or services categories) are curren
44、tly distinguishable from the UMTS BC-IE: - Speech. - Transparent Data for support of Multimedia. - Transparent Data. - Non-transparent Fax. - Non-transparent data. Speech is currently not in the scope of the present document. Each UMTS bearer service is supported by a Radio Access Bearers (RAB). The
45、 RABs in turn are described by the QoS parameters. There may be one or several RAB candidates for supporting a UMTS bearer service. The possible candidates are described by a mapping of the BC-IE to RAB QoS described in subclause 5.2. 5.1 Bearer Capabilities for UMTS Data Services 5.1.1 Transparent
46、Data This service is distinguished by the following BC-IE parameters: - ITC = UDI or 3.1 kHz audio or Other ITC = RDI. - CE = transparent. For this service the FNUR at the setup is restricted to: - 64 kbit/s, in case ITC = UDI. ETSI ETSI TR 123 910 V4.9.1 (2005-06) 103GPP TR 23.910 version 4.9.1 Rel
47、ease 4 - 56 kbit/s in case ITC = UDI or Other ITC = RDI. - 28,8 kbit/s, in case ITC = 3,1 kHz audio. NOTE: ITU-T Recommendation V.90 16 is not supported in transparent mode, because asymmetric user rates are not supported in transparent mode. 5.1.2 Non-Transparent Fax This service is distinguished b
48、y the following BC-IE parameters: - ITC = Fax Group 3 (ITU-T Recommendation T.30 17). - CE = non-transparent. WAIUR shall not be more than 28.8 kbit/s. The possible AIURs are limited to 14,4 kbit/s and 28,8 kbit/s. 5.1.3 NT Data This service is distinguished by the following BC-IE parameters: - ITC
49、= UDI or 3.1 kHz audio or Other ITC = RDI. - CE = non-transparent. The possible AIURs are limited to 14,4 kbit/s, 28,8 kbit/s and 57,6 kbit/s. 5.1.4 Transparent Data for Support of Multimedia This service is distinguished by the following BC-IE parameters: - ITC = UDI or 3.1 kHz audio or Other ITC = RDI. - CE = transparent. - Other rate adaptation = H.223 and H.245. For this service the FNUR at the setup is restricted to: - 64 kbit/s, in case ITC = UDI. - 56 kbit/s in case Other ITC = RDI. - 33,6 kbit/s, in case
