1、 ETSI TS 126 454 V15.0.0 (2018-07) Universal Mobile Telecommunications System (UMTS); LTE; Codec for Enhanced Voice Services (EVS); Interface to Iu, Uu, Nb and Mb (3GPP TS 26.454 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 126 454 V15.0.0 (2018-07)13GPP TS 26.454 version 15.0.0 R
2、elease 15Reference RTS/TSGS-0426454vf00 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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13、ion of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may
14、 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.o
15、rg/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 described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “
16、must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 126 454 V15.0.0 (2018-07)33GPP TS 26.454 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope 6g32 References 6g33 D
17、efinitions 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 protocol 10g36.1.1 General 10g36.1.2 Initialisation 10g36.1.3 Time Alignment Procedure . 11g36.2 Mapping of
18、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 size . 14g36.3.1.3 Codec Mode Indication . 14g36.3.1.4 EVS Codec Mode Request and Rate Control Comma
19、nd 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 Frame Quality Classification . 14g36.3.2.2 Frame Type . 15g36.3.2.3 Codec Mode Indication . 15g36.3.2.
20、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 Determination of the local EVS encoding mode 18g37.3 Generation of UL EVS-CMR for the remote media-sende
21、r . 20g37.4 Interworking in case of the EVS Channel Aware Mode 20g38 Nb Interface User Plane (CN-CN) of a BICC-based CS Core Network (NbF) 20g38.0 General . 20g38.1 Frame structure on the Nb UP transport protocol . 21g38.1.0 General 21g38.1.1 Initialisation 21g38.1.2 Time Alignment Procedure . 21g38
22、.1.3 SID Frame Generation 21g38.1.4 Rate and Mode Control and CMR-Only frames . 21g38.2 Mapping of the EVS bits 21g38.2.1 Mapping for EVS Speech and SID frames . 21g38.2.2 Mapping for EVS-CMR 21g38.3 Frame handlers . 21g3ETSI ETSI TS 126 454 V15.0.0 (2018-07)43GPP TS 26.454 version 15.0.0 Release 15
23、9 Nb Interface User Plane (CN-CN) of a SIP-I-based CS Core Network (NboIP) 21g39.1 General . 21g39.2 Frame Structure 22g39.2.0 General 22g39.2.1 Initialisation 22g39.2.2 Time Alignment Procedure . 22g39.2.3 SID Frame Generation 22g39.2.4 Rate and Mode Control and CMR-Only frames . 22g39.3 RTP Packin
24、g for EVS on Nb for SIP-I . 22g310 Mb Interface User Plane . 22g310.1 Overview 22g310.2 RTP packing on the Mb Interface 23g310.3 Rate and mode control for EVS on Mb 23g311 Interworking between MGW Terminations . 24g311.1 Interworking between different EVS Configurations . 24g311.1.0 General 24g311.1
25、.1 Interworking between EVS Bottom Up Configurations . 25g311.1.2 Interworking between Single Band Configurations 25g311.1.3 Interworking between Bottom Up and Single Band Configurations 25g311.1.4 Interworking between Bottom Up and Non-Bottom Up Configurations 26g311.2 Handling of Speech and SID pa
26、yload. 26g311.2.1 Handling of Speech and SID payload during the call . 26g311.2.1.1 Repacking between Iu and Nb (BICC) 26g311.2.1.2 Repacking between Iu and Nb (SIP-I) . 26g311.2.1.2.1 General 26g311.2.1.2.2 Repacking from Iu to Nb (SIP-I) . 26g311.2.1.2.3 Repacking from Nb (SIP-I) to Iu . 26g311.2.
27、1.3 Repacking between Nb (BICC) and Mb . 27g311.2.1.3.1 General 27g311.2.1.3.2 Repacking from Nb (BICC) to Mb with one frame per RTP packet . 27g311.2.1.3.3 Repacking from Mb with one frame per RTP packet to Nb (BICC) . 27g311.2.2 Handling of Speech and SID payload at call setup . 27g311.3 Filtering
28、 and Modification of EVS-CMR by the MGW . 27g311.3.0 General 27g311.3.1 Maximum Mode Control for EVS in general . 27g311.3.2 Maximum Mode Control for the EVS Channel Aware mode . 28g311.3.3 Maximum Mode Control for the EVS Variable Bit Rate mode 28g311.3.4 Maximum Mode Control for Handover 28g311.4
29、Interworking between Nb and Mb 28g311.4.1 Interworking for EVS Rate Control 28g311.4.1.1 General 28g311.4.1.2 RTP on Mb contains one Speech or one SID frame 29g311.4.1.3 RTP on Mb contains N Speech or SID frames 29g311.4.2 Interworking for Discontinuous Transmission 30g311.5 Interworking between EVS
30、 and AMR-WB 30g311.6 Interworking for the EVS Channel Aware Mode . 30g311.6.1 Introduction. 30g311.6.2 Removal of Jitter in direction PS to CS 31g311.6.3 Removal of Jitter in direction CS to PS 32g3Annex A (informative): Change history . 33g3History 34g3ETSI ETSI TS 126 454 V15.0.0 (2018-07)53GPP TS
31、 26.454 version 15.0.0 Release 15Foreword This Technical Specification has been produced by the 3rdGeneration 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 content
32、s 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 indicates TSG approved docum
33、ent 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 126 454 V15.0.0 (2018-07)63GPP TS 26.454
34、 version 15.0.0 Release 151 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 is specified in TS 26.453 19. The allowed EVS Configurations of the UMTS_EVS Codec Type are specified in T
35、S 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 EVS-CMR by the UE and the Iu-terminating MGW. The present document specifies also the mapping to the Nb I
36、nterface 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 also the interworking of different EVS Configurations on the terminations of the MGW and the interworking
37、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. - References are either specific (identified by date of publication, edition number, version number, et
38、c.) 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
39、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 core network; Stage 2“. 4 3GPP TS 25.415: “Iu Interface CN-UTRAN User plane Protocols“. 5 3GPP TS 29.163: “I
40、nterworking 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 29.415: “Core Network Nb Interface User Plane Protocols“. 8 IETF RFC 3550 (2003): “RTP: A Transport Protoc
41、ol 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. Schulzrinne and T. Taylor. 10 3GPP TS 25.133: “Requirements for support of radio resource management (FDD)“. 11 3
42、GPP 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: “Codec for Enhanced Voice Services (EVS); Adaptive Multi-Rate - Wideband (AMR-WB) backward compatible functio
43、ns“. 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 ETSI TS 126 454 V15.0.0 (2018-07)73GPP TS 26.454 version 15.0.0 Release 1516 3GPP TS 26.449: “Codec for E
44、nhanced 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 for Enhanced Voice Services (EVS); Voice Activity Detection (VAD)“. 19 3GPP TS 26.453: “Codec for Enhanced
45、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 handling and interaction“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present docu
46、ment, 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 21.905 1. Active EVS-CMR: EVS-CMR containing the requested (maximum) bit rate, (maximum) audio bandwidth
47、 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 selects the EVS configuration for Iu and informs the MGW and the RNC in RAB Assignment. EVS Configuration for
48、 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 Configuration for Nb: The MSC selects the EVS configuration for Nb and informs the MGW. major operation mode: This i
49、s 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 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 UE or remote CN Transcoder)
