1、 ETSI TR 126 935 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Packet Switched (PS) conversational multimedia applications; Performance characterisation of default codecs (3GPP TR 26.935 version 15.0.0 Release 1
2、5) TECHNICAL REPORT ETSI ETSI TR 126 935 V15.0.0 (2018-07)13GPP TR 26.935 version 15.0.0 Release 15Reference RTR/TSGS-0426935vf00 Keywords GSM,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 7
3、42 C Association but non lucratif 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 a
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9、emarks registered and owned by the GSM Association. ETSI ETSI TR 126 935 V15.0.0 (2018-07)23GPP TR 26.935 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaini
10、ng 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 Secretaria
11、t. Latest updates are available on the ETSI Web server (https:/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
12、 ETSI Web server) which are, or may be, or may become, essential to the present document. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the p
13、roperty of ETSI, and conveys no right to use or reproduce any trademark and/or tradename. Mention 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 Report (TR) has be
14、en 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 refer
15、ence 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 “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
16、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 TR 126 935 V15.0.0 (2018-07)33GPP TR 26.935 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal
17、verbs terminology 2g3Foreword . 6g31 Scope 7g32 References 7g33 Abbreviations . 8g33.1 Abbreviations . 8g34 General Overview. 9g34.1 Introduction 9g34.2 Tests over DCH radio channels 9g34.3 Tests over HSDPA/EUL radio channels 10g35 Test bed and test plan for Phase 1 10g35.1 Test methodology . 10g35.
18、2 Test arrangement 11g35.2.1 Description of the testing system 11g35.2.2 Network simulator 12g35.2.3 UMTS simulator choices 13g35.2.3.1 RAB and protocols 13g35.2.3.2 Description of the RLC implementation . 14g35.2.3.3 Physical Layer Implementation . 15g35.2.4 Headsets and Sound Card . 16g35.2.5 Test
19、 environment 17g35.2.6 Calibration and test conditions monitoring . 17g35.2.6.1 Speech level 17g35.2.6.2 Delay. 17g35.3 Test conditions for AMR-NB codec . 17g35.4 Test conditions for AMR-WB codec 19g36 Test bed and test plan for Phase 2 20g36.1 Test arrangement 20g36.1.1 Description of the proposed
20、testing system 20g36.1.2 Network simulator 21g36.1.3 Calibration and test conditions monitoring . 22g36.2 Test Conditions 22g37 Analysis of test results for DCH channels for Phase 1 and 2 . 23g37.1 Conversation Tests . 23g37.2 Experimental Design and Statistical Procedures 24g37.3 Narrowband Test -
21、Symmetric conditions (Set 1) 25g37.4 Narrowband Test Asymmetric Conditions (Set 2) . 31g37.5 Wideband Test Symmetric Conditions (Set 3) 33g37.6 Wideband Test Asymmetric Conditions (Set 4) 38g37.7 Phase 2 - ITU-T Codec Tests (Set 5) 41g37.8 Summary of Test Result Analysis 44g38 Performance characteri
22、sation of VoIMS over HSDPA/EUL channels 44g38.A Listening only tests . 44g38.A.1 Test methodology for listening only tests . 44g38.A.2 Test arrangement 44g38.A.3 Jitter buffer implementations 45g38.A.3.1 Fixed JBM . 45g38.A.3.2 Adaptive JBM . 45g38.A.4 Network conditions . 45g38.A.5 Listening experi
23、ments. 46g3ETSI ETSI TR 126 935 V15.0.0 (2018-07)43GPP TR 26.935 version 15.0.0 Release 158.A.6 Test Results . 47g38.A.7 Delay analysis . 52g38.A.8 Listening only test conclusions 58g38.B Conversation Tests . 58g38.B.1 Introduction. 58g38.B.2 The Test Plan 58g38.B.3 Cross-check of Test Lab Results .
24、 60g38.B.4 Test Results . 60g38.B.4.1 Mean Scores by Experiment and by Test Lab . 60g38.B.4.2 Subject Consistency Measures for Test Labs 64g38.B.4.3 Multivariate Analysis of Variance (MANOVA) . 64g38.B.4.3.1 MANOVA Results and Statistics 65g38.B.4.3.2 Composite Scores Conversational Quality . 67g38.
25、B.4.3.3 Conversational Quality by Experimental Factors 69g38.B.5 Conversation tests conclusions . 73g39 Conclusions 73g39.1 Tests over DCH radio channels 73g39.2 Tests over HSDPA/EUL radio channels; listening only tests . 73g39.3 Tests over HSDPA/EUL radio channels; conversation tests 73g39.4 Genera
26、l consideration . 73g3Annex A: Conversation test composite dependent variable scores by condition and Lab 74g3Annex B: Instructions to subjects . 76g3Annex C: Example Scenarios for the conversation test 77g3Annex D: Test Plan for the AMR Narrow-Band Packet Switched Conversation Test 79g3Annex E: Tes
27、t Plan for the AMR Wide-Band Packet Switched Conversation Test 96g3Annex F: Test plan for Packet Switched Conversation Tests for Comparison of Quality Offered by Different Speech Coders . 113g3Annex G: Test Plan for Global Analysis of PSS Conversation Tests. 125g3Annex H: Test Plan for Performance c
28、haracterisation of VoIMS over HSDPA/EUL channels; listening only tests . 130g3H.1 Introduction 130g3H.2 Listening only test conditions. 130g3H.3 End-to-end delay analysis 131g3H.4 Listening only experiments 131g3H.5 Test material processing . 132g3Annex I: Illustrative scheme for jitter buffer manag
29、ement 134g3I.1 Pseudo code 134g3I.2 Verification against the minimum performance requirements . 139g3I.2.1 Delay performance . 140g3I.2.2 JBM induced error concealment operations . 143g3Annex J: Test processing for listening only tests 144g3J.1 Speech preparation . 144g3J.2 Pre-processing 144g3J.3 P
30、rocessing of speech/background noise signal . 144g3J.4 Up and Down-Sampling, Rounding and Scaling . 145g3ETSI ETSI TR 126 935 V15.0.0 (2018-07)53GPP TR 26.935 version 15.0.0 Release 15J.5 Processing for Direct Conditions . 146g3J.6 Processing for MNRU conditions 146g3J.7 Processing of voice over IMS
31、 over HSPA . 146g3J.8 Post-processing . 147g3J.9 Test conditions . 147g3Annex K: Radio network simulation for HSDPA/EUL performance characterization 149g3Annex L: Test Plan for the AMR NB/WB Conversation Test in UMTS over HSDPA/EUL 153g3L.1 Introduction 153g3L.2 General Information . 153g3L.2.1 Perm
32、anent Documents 153g3L.2.2 Key Acronyms 153g3L.2.3 Contacts 154g3L.2.4 Participants . 154g3L.3 Test Methodology 155g3L.3.1 Introduction 155g3L.3.2 Test Design . 156g3L.3.2.1 Description of the Test Bed 156g3L.3.2.2 Transmission System 157g3L.3.2.3 Radio Access Bearers . 157g3L.3.2.4 Test environment
33、 158g3L.3.3 Test Conditions 158g3L.4 Test Procedure 163g3L.4.1 Time Projection 163g3L.4.2 Instructions to the Subjects . 164g3L.4.3 Test Materials . 165g3L.4.4 Deliverables 165g3L.4.5 Data Analysis . 165g3L.5 Working Document for the Performance Characterization of VoIMS over HSDPA/EDCH. 165g3L.5.1
34、Introduction 165g3L.5.2 System Overview . 166g3L.5.3 Radio Access Bearers . 167g3L.5.4 Delay 170g3L.5.5 RN Simulator 172g3L.5.6 Core Network . 173g3L.5.7 VoIP Client . 173g3L.5.8 Interfaces 175g3L.5.8.1 Interface 1 . 176g3L.5.8.2 Interface 2 . 176g3L.5.8.3 Interface 3 . 176g3L.5.9 Simulated HSPA Air
35、-Interface . 177g3L.5.9.1 General Description 177g3L.5.9.2 Error-Delay Profiles . 177g3L.5.A.1 Network Parameters 181g3L.5.A.2 Traffic Assumptions (example: AMR 7.95) 182g3L.5.A.3 Other Assumptions 183g3L.5.A.4 Simulation Methodology . 184g3Bibliography . 184g3Annex M: Change history 185g3History 18
36、6g3ETSI ETSI TR 126 935 V15.0.0 (2018-07)63GPP TR 26.935 version 15.0.0 Release 15Foreword This Technical Report 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 a
37、pproval. 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 presented to TSG for information; 2 presented to TSG for approval;
38、 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. ETSI ETSI T
39、R 126 935 V15.0.0 (2018-07)73GPP TR 26.935 version 15.0.0 Release 151 Scope The present document provides information on the performances of default speech codecs in packet switched conversational multimedia applications. The codecs under test are AMR-NB (Adaptive Multi-Rate Narrowband) and AMR-WB (
40、Adaptive Multi-Rate Wideband). In addition, several ITU-T codecs (G.723.1, G.729, G.722 and G.711) are included in the testing. Experimental test results from the speech quality testing are reported to illustrate the behaviour of these codecs. The results give information of the performance of PS co
41、nversational multimedia applications under various operating and transmission conditions (e.g., considering radio transmission errors, IP packet losses, end-to-end delays, and several types of background noise). The performance results can be used e.g. as guidance for network planning and to appropr
42、iately adjust the radio network parameters. 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, etc.) or non-
43、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
44、 Release as the present document 1 ITU-T Recommendation P.800: “Methods for Subjective Determination of Transmission Quality“. 2 ITU-T Recommendation P.831: “Subjective performance evaluation of network echo cancellers“. 3 ITU-T Recommendation G.711: “Pulse code modulation (PCM) of voice frequencies
45、“. 4 ITU-T Recommendation G.729: “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear-prediction (CS-ACELP)“. 5 ITU-T Recommendation G.723.1: “Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s“. 6 ITU-T Recommendation G.722: “7 k
46、Hz audio-coding within 64 kbit/s“. 7 IETF RFC 1889: “RTP: A Transport Protocol for Real-Time Applications“. 8 IETF RFC 3267: “Real-Time Transport Protocol (RTP) Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) Adaptive Multi-Rate Wideband (AMR-WB) Audio Codecs“. 9 3GPP TS 34.
47、121: “Terminal Conformance Specification, Radio Transmission and Reception (FDD)“ (downlink). 10 3GPP TS 25.141: “ Base Station (BS) conformance testing (FDD)“ (uplink). 11 3GPP TR 25.853 “Delay budget within the access stratum“. 12 3GPP TS 26.235: “Packet switched conversational multimedia applicat
48、ions; Default codecs“. 13 3GPP TS 26.071: “AMR speech Codec; General description“. 14 3GPP TS 26.171: “AMR speech codec, wideband; General description“. 15 3GPP TS 25.322: “Radio Link Control (RLC) protocol specification“. 16 IETF RFC 3095: “RObust Header Compression (ROHC): Framework and four profi
49、les: RTP, UDP, ESP, and uncompressed“. ETSI ETSI TR 126 935 V15.0.0 (2018-07)83GPP TR 26.935 version 15.0.0 Release 1517 3GPP TS 34.108: “Common test environments for User Equipment (UE) conformance testing“. 18 ETSI TR 101 112: “Universal Mobile Telecommunications System (UMTS); Selection procedures for the choice of radio transmission technologies of the UMTS“ (UMTS 30.03 v3.1.0). 19 3GPP TS 26.114 : “IP Multimedia Subsystem (IMS); Multimedia Telephony; Media handling and interaction“ 20 ITU-T Recommendation P.805 (P.CONV): “Su
