1、 ETSI TS 126 454 V14.0.0 (2017-04) Universal Mobile Telecommunications System (UMTS); LTE; Codec for Enhanced Voice Services (EVS); Interface to Iu, Uu, Nb and Mb (3GPP TS 26.454 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 126 454 V14.0.0 (2017-04)13GPP TS 26.454 version 14.0.0 R
2、elease 14Reference RTS/TSGS-0426454ve00 Keywords LTE,UMTS 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 lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Import
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9、 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 for ETSI members and non-members, and can be found in ETSI SR 000 3
10、14: “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 (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigat
11、ion, 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. Foreword This Technical Specificati
12、on (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 interpreted as being references to the corresponding ETSI deliverables. T
13、he 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“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as
14、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 126 454 V14.0.0 (2017-04)33GPP TS 26.454 version 14.0.0 Release 14Contents Intellectual Pro
15、perty Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope 6g32 References 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 General . 8g35 RAB aspects . 9g36 Iu Interface User Plane (RAN-CN) 10g36.1 Frame structure on the Iu UP transport protoco
16、l 10g36.1.1 General 10g36.1.2 Initialisation 10g36.1.3 Time Alignment Procedure . 11g36.2 Mapping of the bits. 11g36.3 Frame handlers . 13g36.3.0 General 13g36.3.1 Handling of frames from TC to Iu interface (downlink) . 14g36.3.1.0 General 14g36.3.1.1 Frame Quality Classification . 14g36.3.1.2 Frame
17、 size . 14g36.3.1.3 Codec Mode Indication . 14g36.3.1.4 EVS Codec Mode Request and Rate Control Command in downlink 14g36.3.1.5 Optional internal 8 bits CRC . 14g36.3.1.6 Mapping of Speech or SID bits . 14g36.3.2 Handling of frames from Iu interface to TC (uplink) . 14g36.3.2.0 General 14g36.3.2.1 F
18、rame Quality Classification . 15g36.3.2.2 Frame Type . 15g36.3.2.3 Codec Mode Indication . 15g36.3.2.4 EVS Codec Mode Request and Rate Control Procedure . 15g36.3.2.5 Optional internal 8 bits CRC . 17g36.3.2.6 Speech and SID bits 17g37 Uu Interface User Plane (UE-RAN) . 17g37.1 General . 17g37.2 Det
19、ermination of the local EVS encoding mode 19g37.3 Generation of UL EVS-CMR for the remote media-sender . 21g37.4 Interworking in case of the EVS Channel Aware Mode 21g38 Nb Interface User Plane (CN-CN) of a BICC-based CS Core Network (NbF) 21g38.0 General . 21g38.1 Frame structure on the Nb UP trans
20、port protocol . 22g38.1.0 General 22g38.1.1 Initialisation 22g38.1.2 Time Alignment Procedure . 22g38.1.3 SID Frame Generation 22g38.1.4 Rate and Mode Control and CMR-Only frames . 22g38.2 Mapping of the EVS bits 22g38.2.1 Mapping for EVS Speech and SID frames . 22g38.2.2 Mapping for EVS-CMR 22g3ETS
21、I ETSI TS 126 454 V14.0.0 (2017-04)43GPP TS 26.454 version 14.0.0 Release 148.3 Frame handlers . 22g39 Nb Interface User Plane (CN-CN) of a SIP-I-based CS Core Network (NboIP) 23g39.1 General . 23g39.2 Frame Structure 23g39.2.0 General 23g39.2.1 Initialisation 23g39.2.2 Time Alignment Procedure . 23
22、g39.2.3 SID Frame Generation 23g39.2.4 Rate and Mode Control and CMR-Only frames . 23g39.3 RTP Packing for EVS on Nb for SIP-I . 23g310 Mb Interface User Plane . 24g310.1 Overview 24g310.2 RTP packing on the Mb Interface 24g310.3 Rate and mode control for EVS on Mb 25g311 Interworking between MGW Te
23、rminations . 25g311.1 Interworking between different EVS Configurations . 25g311.1.0 General 25g311.1.1 Interworking between EVS Bottom Up Configurations . 26g311.1.2 Interworking between Single Band Configurations 26g311.1.3 Interworking between Bottom Up and Single Band Configurations 27g311.1.4 I
24、nterworking between Bottom Up and Non-Bottom Up Configurations 27g311.2 Handling of Speech and SID payload. 27g311.2.1 Handling of Speech and SID payload during the call . 27g311.2.1.1 Repacking between Iu and Nb (BICC) 27g311.2.1.2 Repacking between Iu and Nb (SIP-I) . 27g311.2.1.2.1 General 27g311
25、.2.1.2.2 Repacking from Iu to Nb (SIP-I) . 28g311.2.1.2.3 Repacking from Nb (SIP-I) to Iu . 28g311.2.1.3 Repacking between Nb (BICC) and Mb . 28g311.2.1.3.1 General 28g311.2.1.3.2 Repacking from Nb (BICC) to Mb with one frame per RTP packet . 28g311.2.1.3.3 Repacking from Mb with one frame per RTP p
26、acket to Nb (BICC) . 28g311.2.2 Handling of Speech and SID payload at call setup . 28g311.3 Filtering and Modification of EVS-CMR by the MGW . 28g311.3.0 General 28g311.3.1 Maximum Mode Control for EVS in general . 29g311.3.2 Maximum Mode Control for the EVS Channel Aware mode . 29g311.3.3 Maximum M
27、ode Control for the EVS Variable Bit Rate mode 29g311.3.4 Maximum Mode Control for Handover 29g311.4 Interworking between Nb and Mb 30g311.4.1 Interworking for EVS Rate Control 30g311.4.1.1 General 30g311.4.1.2 RTP on Mb contains one Speech or one SID frame . 30g311.4.1.3 RTP on Mb contains N Speech
28、 or SID frames . 31g311.4.2 Interworking for Discontinuous Transmission 31g311.5 Interworking between EVS and AMR-WB 31g311.6 Interworking for the EVS Channel Aware Mode . 32g311.6.1 Introduction. 32g311.6.2 Removal of Jitter in direction PS to CS 33g311.6.3 Removal of Jitter in direction CS to PS 3
29、4g3Annex A (informative): Change history . 35g3History 36g3ETSI ETSI TS 126 454 V14.0.0 (2017-04)53GPP TS 26.454 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to conti
30、nuing 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 where: x the first digit: 1 pre
31、sented 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 o
32、nly changes have been incorporated in the document. ETSI ETSI TS 126 454 V14.0.0 (2017-04)63GPP TS 26.454 version 14.0.0 Release 141 Scope The Enhanced Voice Services (EVS) Codec is specified in Technical Specifications 3GPP TS 26.441 11 to TS 26.451 19. The generic frame format for 3G CS networks i
33、s specified in TS 26.453 19. The allowed EVS Configurations of the UMTS_EVS Codec Type are specified in TS 26.103 20. The present document specifies the mapping of the EVS generic frame format (3GPP TS 26.453 19) to the Iu Interface (3GPP TS 25.415 4) and the Uu Interface, including handling of the
34、EVS-CMR by the UE and the Iu-terminating MGW. The present document specifies also the mapping to the Nb Interface in a BICC-based circuit switched core network. (3GPP TS 29.415 7) and the Nb-Interface in a SIP-I-based circuit switched core network (3GPP TS 23.231 3). The present document specifies a
35、lso the interworking of different EVS Configurations on the terminations of the MGW and the interworking between EVS and AMR-WB on the terminations of the MGW. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document
36、. - 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 (incl
37、uding 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 TR 41.001: “GSM Specification set“. 3 3GPP TS 23.231: “SIP-I based circuit-switched cor
38、e network; Stage 2“. 4 3GPP TS 25.415: “Iu Interface CN-UTRAN User plane Protocols“. 5 3GPP TS 29.163: “Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks“ 6 3GPP TS 29.414: “Core network Nb data transport and transport signalling“. 7 3GPP TS 2
39、9.415: “Core Network Nb Interface User Plane Protocols“. 8 IETF RFC 3550 (2003): “RTP: A Transport Protocol for Real-Time Applications“, H. Schulzrinne, S. Casner, R. Frederick and V. Jacobson. 9 IETF RFC 4733 (2006): “RTP Payload for DTMF Digits, Telephony Tones, and Telephony Signals“, H. Schulzri
40、nne and T. Taylor. 10 3GPP TS 25.133: “Requirements for support of radio resource management (FDD)“. 11 3GPP TS 26.441: “Codec for Enhanced Voice Services (EVS); General overview“. 12 3GPP TS 26.445: “Codec for Enhanced Voice Services (EVS); Detailed algorithmic description“. 13 3GPP TS 26.446: “Cod
41、ec for Enhanced Voice Services (EVS); Adaptive Multi-Rate - Wideband (AMR-WB) backward compatible functions“. 14 3GPP TS 26.447: “Codec for Enhanced Voice Services (EVS); Error concealment of lost packets“. 15 3GPP TS 26.448: “Codec for Enhanced Voice Services (EVS); Jitter buffer management“. ETSI
42、ETSI TS 126 454 V14.0.0 (2017-04)73GPP TS 26.454 version 14.0.0 Release 1416 3GPP TS 26.449: “Codec for Enhanced Voice Services (EVS); Comfort Noise Generation (CNG) aspects“. 17 3GPP TS 26.450: “Codec for Enhanced Voice Services (EVS); Discontinuous Transmission (DTX)“. 18 3GPP TS 26.451: “Codec fo
43、r Enhanced Voice Services (EVS); Voice Activity Detection (VAD)“. 19 3GPP TS 26.453: “Codec for Enhanced Voice Services (EVS); Speech codec frame structure“. 20 3GPP TS 26.103: “Speech codec list for GSM and UMTS“. 21 3GPP TS 26.114: “IP Multimedia Subsystem (IMS); Multimedia Telephony; Media handli
44、ng and interaction“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in 3GPP 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 3GPP TR
45、 21.905 1. Active EVS-CMR: EVS-CMR containing the requested (maximum) bit rate, (maximum) audio bandwidth and the major operation mode. DL EVS-CMR: the most recent successfully in downlink (DL) received codec mode request, relevant for encoding at the local UE. EVS Configuration for Iu: The MSC sele
46、cts the EVS configuration for Iu and informs the MGW and the RNC in RAB Assignment. EVS Configuration for Uu: The RNC selects the EVS configuration for Uu. EVS Configuration for UE: The UE deducts the EVS configuration for UE from the Radio Bearer Configuration, i.e. the Set of TFCs. EVS Configurati
47、on for Nb: The MSC selects the EVS configuration for Nb and informs the MGW. major operation mode: This is either an EVS Primary mode of operation or an EVS AMR-WB IO mode of operation. Set of available rates: Rates of the EVS Configuration for UE, constrained further by RNC allowed TFCs and further
48、 constrained by the UE autonomous rate. UE autonomous rate: Maximum bit rate set by UE transport layer to optimize uplink performance (frame loss rate) if the TX power limit is reached. UL EVS-CMR: EVS-CMR sent by the UE in uplink (UL); relevant for encoding at the remote media-sender (e.g. remote U
49、E or remote CN Transcoder), requesting the (maximum) codec mode to be used on the local DL to the UE. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 1. BICC Bearer Independent Call Control CN Core Network CMR Codec Mode Request (for AMR and AMR-WB, often also used for EVS) DL Downlink EVS Enhance
