TR 143 903 V8 3 0 Digital cellular telecommunications

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3GPP TR 43 903 version 8 3 0 Release 8 1 ETSI TR 143 903 V8 3 0 2009 02. DTR TSGG 0043903v830,650 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 lucratif enregistr e la,Sous Pr fecture de Grasse 06 N 7803 88. Important notice, Individual copies of the present document can be downloaded from. http www etsi org, The present document may be made available in more than one electronic version or in print In any case of existing or.
perceived difference in contents between such versions the reference version is the Portable Document Format PDF. In case of dispute the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive. within ETSI Secretariat, Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at. http portal etsi org tb status status asp, If you find errors in the present document please send your comment to one of the following services. http portal etsi org chaircor ETSI support asp,Copyright Notification. No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2009. All rights reserved,TM TM TM TM, DECT PLUGTESTS UMTS TIPHON the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered. for the benefit of its Members, 3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE is a Trade Mark of ETSI currently being registered. for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. 3GPP TR 43 903 version 8 3 0 Release 8 2 ETSI TR 143 903 V8 3 0 2009 02. Intellectual 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 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 http webapp etsi org IPR home asp, 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 essential to the present document. This Technical Report TR 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 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, 3GPP TR 43 903 version 8 3 0 Release 8 3 ETSI TR 143 903 V8 3 0 2009 02. Intellectual Property Rights 2,Foreword 2,Foreword 5. Introduction 5,2 References 6,3 Definitions symbols and abbreviations 7.
3 1 Definitions 7,3 2 Symbols 8,3 3 Abbreviations 9. 4 Requirements 9,5 Overview 10,5 1 Background 10,5 2 Architecture 11. 5 2 1 Legacy Architecture 11,5 2 2 PCM encoded speech G 711 over IP 12. 5 2 3 Compressed speech over IP 13,5 2 4 Example Deployment Scenarios 15. 5 3 Functional Impacts 19,5 3 1 G 711 and compressed speech over IP 19.
5 3 2 Support for Data and Fax Services 20,5 3 3 Functional Impacts for Migration 20. 6 Study Results User Plane 20,6 1 User Plane Principles 20. 6 1 1 Transport network User Plane for A over IP 20. 6 1 1 1 PCM coded speech G 711 over IP 20,6 1 1 2 Compressed speech and data fax over IP 21. 6 1 2 Transport network Control Plane for A over IP 21. 6 1 3 Potential impact on the Nb and Nc interfaces 21. 6 2 Payload Formats 21,6 2 1 Existing TRAU Frames for Speech 21. 6 2 2 RTP profiles for speech 25, 6 2 2 1 RTP profiles for G 711 encoded speech on the A over IP interface 25.
6 2 2 2 RTP profiles for compressed speech on the A over IP 25. 6 2 2 3 RTP profiles for compressed speech on Nb interface 26. 6 2 3 RTP profiles for data and fax calls 26, 6 2 3 1 RTP profiles for data and fax calls with rate adaptation in BSS 26. 6 2 3 2 RTP profiles for data and fax calls with rate adaptation in CN 26. 6 3 Transport Layer 27,6 3 1 Link Layer and Physical Layer 27. 6 3 2 UDP and IP 27,6 3 3 RTP 27,6 3 4 RTCP 27,6 3 5 IP Multiplexing 27. 6 4 Handover Procedure User Plane 28,6 4 1 Alternative 1 28. 6 4 1 1 General Handover Procedure 28, 6 4 1 2 Intra BSC Handover to a compatible target cell 28.
6 4 1 3 Intra BSC Handover to an incompatible target cell 28. 6 4 1 4 Inter BSC Handover 28,6 4 2 Alternative 2 28. 6 5 Time Alignment 28, 3GPP TR 43 903 version 8 3 0 Release 8 4 ETSI TR 143 903 V8 3 0 2009 02. 6 5 1 Introduction 28,6 5 2 Time Alignment principles 29. 6 5 3 Time Alignment performances evaluation 30,6 5 4 Proposed implementation 31. 6 5 5 Summary 32,7 Study Results Control Plane 33,7 1 Control Plane Principles 33.
7 1 1 Exchange of Transport Layer Information 33, 7 1 2 Need for a Call Identifier for IP based calls 34. 7 1 3 Exchange of Codec Information 35, 7 1 3 1 Exchange of Codec Information at Call Establishment 35. 7 1 3 2 Exchange of Codec Information at Handover 37. 7 1 4 Location of Transcoder Resource in BSS or CN 38. 7 1 5 Exchange of RTP Parameters 38,7 2 Signalling Messages 40. 7 2 1 BSSMAP 40,7 2 1 1 Assignment Request 40,7 2 1 2 Assignment Complete 40. 7 2 1 3 Handover Required 41,7 2 1 4 Handover Request 42.
7 2 1 5 Handover Request Acknowledge 43,7 2 1 6 Handover Performed 43. 7 2 1 7 Complete Layer 3 Information 44,7 2 1 8 BSC SCL and MSC PCL 44. 7 2 1 9 Speech Codec Chosen 45,7 2 1 10 Speech Codec Used 45. 7 2 1 11 Circuit Switched Data Codec CSD Dummy Codec 45. 7 2 2 DTAP 46,7 2 3 VGCS VBS Protocol 46,7 2 4 H 248 Protocol 46. 7 3 Procedures 46,7 3 1 Codec Negotiation at Call Setup 46.
7 3 2 Codec Negotiation at Handover 48, 7 3 2 1 Intra BSC Handover to a Compatible Target Cell 49. 7 3 2 2 Intra BSC Handover to an Incompatible Target Cell 49. 7 3 2 3 Inter BSC Handover 52, 7 3 3 Codec Re Negotiation after Inter BSC Handover 54. 7 4 Impacts on the A Interface Control Plane 56,7 4 1 New Information Element BSC SCL 56. 7 4 2 New Information Element MSC PCL 58, 7 4 3 New Information Element Speech Codec Chosen 59. 7 4 4 New Information Element Speech Codec Used 59. 8 Informative Network Design Issues 60,8 1 Solution 1 60.
8 2 Solution 2 60,9 Expected impacts to existing specifications 60. 10 Summary and Conclusion 60,Annex A informative Change history 62. History 63, 3GPP TR 43 903 version 8 3 0 Release 8 5 ETSI TR 143 903 V8 3 0 2009 02. This Technical Report 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 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,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 corrections. updates etc, z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction, The present document captures the results of the feasibility study for introducing support for A interface over IP. 3GPP TR 43 903 version 8 3 0 Release 8 6 ETSI TR 143 903 V8 3 0 2009 02. The present document contains the result from the study of introduction of support for A interface over IP High level. areas that are studied are e g potential placement of transcoders in the core network effective bandwidth utilisation at. the A interface impact on call related messages payload formats. The following items shall be covered in the study, In the target solution it is wanted to transfer compressed speech as far as possible end to end to achieve. efficient transport and speech quality The possibility to free GERAN from handling all kind of transcoders. shall be studied and the architecture might place Codecs in the core network. Impacts changes on current A interface procedures resulting from placing transcoders in the core network as. well as in the BSS shall be studied e g impacts on the assignment and handover procedures. In addition to allow compressed speech over the A interface the study shall provide further solution for. effective bandwidth utilisation at the A interface which means it shall describe multiplexing of RTP flows and. how this will be negotiated between the BSS and CN nodes. The study shall describe a solution for true end to end Codec negotiation which considers on a call basis the. preference situation of the radio network, It shall be studied how call related messages have to be adapted e g transfer of Codec related information. identification of calls sessions, The study shall describe the wanted payload formats and other relevant user plane parameters like.
packetization time etc,2 References, The following documents contain provisions which through reference in this text constitute provisions of the present. 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 3GPP TR 21 905 Vocabulary for 3GPP Specifications. 2 3GPP TS 23 205 Bearer independent circuit switched core network. 3 3GPP TS 25 415 UTRAN Iu Interface User Plane Protocols. 4 3GPP TS 48 006 Signaling Transport Mechanism Specification for the Base Station System. Mobile services Switching Centre BSS MSC Interface. 5 3GPP TS 23 002 Network architecture Release 8, 6 3GPP TS 48 008 Mobile Switching Centre Base Station System MSC BSS interface. Layer 3 specification, 7 3GPP TS 48 060 In band control for remote transcoders and rate adaptors for.
full rate traffic channels, 8 3GPP TS 48 061 In band control for remote transcoders and rate adaptors for. half rate traffic channels, 9 3GPP TS 26 103 Speech Codec list for GSM and UMTS. 3GPP TR 43 903 version 8 3 0 Release 8 7 ETSI TR 143 903 V8 3 0 2009 02. 10 3GPP TS 29 802 G MSC S G MSC S Nc Interface based on the SIP I protocol. 11 3GPP TS 23 153 Out of band transcoder control Stage 2. 12 3GPP TS 23 231 SIP I based circuit switched core network Stage 2. 13 3GPP TS 29 414 Core network Nb data transport and transport signalling. 14 3GPP TS 25 415 UTRAN Iu interface user plane protocols. 15 3GPP TS 29 415 Core Network Nb Interface User Plane Protocols. 16 3GPP TS 28 062 Inband Tandem Free Operation TFO of speech codecs Service description. 17 3GPP TS 26 093 Mandatory speech codec speech processing functions Adaptive Multi Rate. AMR speech codec Source controlled rate operation, 18 IETF RFC 4040 RTP Payload Format for a 64 kbit s Transparent Call. 19 IETF RFC 3551 RTP Profile for Audio and Video Conferences with Minimal Control. 20 IETF RFC 768 User Datagram Protocol,21 IETF RFC 791 Internet Protocol. 22 IETF RFC 792 Internet Control Message Protocol, 23 IETF RFC 2460 Internet Protocol Version 6 IPv6 Specification.
24 IETF RFC 4443 Internet Control Message Protocol ICMPv6 for the Internet Protocol Version 6. IPv6 Specification, 25 IETF RFC 4867 RTP Payload Format and File Storage Format for the Adaptive Multi Rate. AMR and Adaptive Multi Rate Wideband AMR WB Audio Codecs. 3 Definitions symbols and abbreviations,3 1 Definitions. For the purposes of the present document the terms and definitions given in TR 21 905 1 and the following apply A. term defined in the present document takes precedence over the definition of the same term if any in TR 21 905 1. example text used to clarify abstract rules by applying them literally. For the sake of easy explanation the following short terms are defined. Legacy MSC Server,The Legacy MSC server does not support AoIP. Legacy MGW,The Legacy MGW does not support AoIP,Legacy BSS. The Legacy BSS does not support AoIP,New MSC Server.
The New MSC Server supports only the AoIP interface. Legacy BSSes are not supported by a New MSC Server. Upgraded MSC Server, The Upgraded MSC Server supports both the TDM A interface and the IP A interface Both kinds of interfaces could. work simultaneously for different BSSs It is claimed by some companies e g Ericsson that it is necessary to support. ETSI TR 143 903 V8 3 0 2009 02 Technical Report Digital cellular telecommunications system Phase 2 A interface over IP study AINTIP 3GPP TR 43 903 version 8 3 0 Release 8

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