ETSI EG 202 057-2-2011 Speech and multimedia Transmission Quality (STQ) User related QoS parameter definitions and measurements Part 2 Voice telephony Group 3 fax modem data servic_1.pdf

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1、 ETSI EG 202 057-2 V1.3.2 (2011-04)ETSI Guide Speech and multimedia Transmission Quality (STQ);User related QoS parameter definitions and measurements;Part 2: Voice telephony, Group 3 fax,modem data services and SMSETSI ETSI EG 202 057-2 V1.3.2 (2011-04) 2Reference REG/STQ-00149-2 Keywords data, fax

2、, modem, QoS, quality, user, voice 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 Important notice Individual c

3、opies 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 Forma

4、t (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 st

5、atus 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 exc

6、ept as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2011. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI regist

7、ered 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. 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 a

8、re Trade Marks registered and owned by the GSM Association. ETSI ETSI EG 202 057-2 V1.3.2 (2011-04) 3Contents Intellectual Property Rights 5g3Foreword . 5g31 Scope 7g32 References 7g32.1 Normative references . 7g32.2 Informative references 8g33 Definitions and abbreviations . 9g33.1 Definitions 9g33

9、.2 Abbreviations . 11g34 General considerations . 12g34.1 Services covered . 12g34.2 Use of the parameters . 12g34.3 Reporting for different classes of customers 12g34.4 Non standard levels of QoS 13g34.5 Reporting for directly - and indirectly-serviced customers 13g34.6 Data processing issues 13g34

10、.7 Data collection period 13g34.8 Sampling and test calls . 14g34.9 Comparability of measurements . 14g34.10 Publication of QoS parameters . 14g35 QoS parameters for voice, data and fax services accessed via the PTN and SMS . 14g35.1 Unsuccessful call ratio 16g35.1.1 Definition 16g35.1.2 Application

11、 . 16g35.1.3 Measurement and statistics . 16g35.1.4 Further considerations. 17g35.2 Call set up time . 18g35.2.1 Definition 18g35.2.2 Application . 18g35.2.3 Measurement and statistics . 18g35.2.4 Further considerations. 19g35.3 Speech connection quality 20g35.3.1 General considerations 20g35.3.2 Ev

12、aluation methods. 21g35.3.2.1 Methods based on intrusive measurements . 21g35.3.2.2 Methods based on non-intrusive measurements 22g35.3.2.3 Methods based on the usage of the E model . 22g35.3.3 Practical Implementation of parametrical model 23g35.3.3.1 Results . 24g35.3.3.2 Further considerations .

13、24g35.3.4 Application . 24g35.4 Fax connection quality . 24g35.4.1 Definition 24g35.4.2 Application . 25g35.4.3 Measurement and statistics . 25g35.5 Data rate of dial-up access to the Internet 25g35.5.1 Definition 25g35.5.2 Application . 26g35.5.3 Measurement and statistics . 26g35.5.4 Further consi

14、derations. 26g35.6 Short Message Service (SMS) QoS parameters . 27g35.6.1 Successful SMS Ratio . 27g35.6.1.1 Definition 27g3ETSI ETSI EG 202 057-2 V1.3.2 (2011-04) 45.6.1.2 Application 27g35.6.1.3 Measurement and statistics . 27g35.6.1.4 Further considerations . 28g35.6.2 Completion Rate for SMS . 2

15、8g35.6.2.1 Definition 28g35.6.2.2 Application 28g35.6.2.3 Measurement and statistics . 28g35.6.3 End-to-End delivery time for SMS . 28g35.6.3.1 Definition 28g35.6.3.2 Application 29g35.6.3.3 Measurement and statistics . 29g3Annex A: Combination of weekly or monthly results . 30g3Annex B: Further exp

16、lanation of “X % of“ 31g3Annex C: Decision about the success of a call attempt . 32g3Annex D: Relationship between the accuracy of the estimator of the unsuccessful call ratio and the number of calls to be observed . 34g3D.1 Theory 34g3D.2 Guidance . 36g3Annex E: Method of calculating the number of

17、observations required for measures of time 38g3Annex F: Standardized test chart for fax connection quality 39g3Annex G: Guidance on the selection of representative samples and test calls 42g3G.1 Specific considerations for determining measurement locations and their distribution for voice quality me

18、asurements . 42g3Annex H: Application examples of measurement location determination 45g3H.1 Example for France 45g3H.2 Example for Switzerland 47g3Annex I: Calculation of the Design figure of merit for speech quality 49g3I.1 The reference terminals 49g3I.2 The network performance characteristics .

19、49g3I.2.1 Questions for fixed operators . 50g3I.2.2 Questions for mobile operators 52g3I.2.3 Treatment of echo . 56g3I.3 Calculating the end-to-end performance 56g3I.4 Terminals 58g3Annex J: Bibliography 59g3History 60g3ETSI ETSI EG 202 057-2 V1.3.2 (2011-04) 5Intellectual Property Rights IPRs essen

20、tial 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 potential

21、ly 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 b

22、y 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 ETSI Guide (EG) has been produced by ETSI Technical Committee Speech and

23、 multimedia Transmission Quality (STQ). The present document is part 2 of a multi-part deliverable covering Speech and multimedia Transmission Quality (STQ); User related QoS parameter definitions and measurements, as identified below: Part 1: “General“; Part 2: “Voice telephony, Group 3 fax, modem

24、data services and SMS“; Part 3: “QoS parameters specific to Public Land Mobile Networks (PLMN)“; Part 4: “Internet access“. EG 202 057-1 i.5 contains general user related QoS parameter definitions and measurement methods that can be applied to any service. EG 202 057-2 (the present document) contain

25、s user related QoS parameter definitions and measurement methods for voice, Group 3 fax, modem data services and SMS accessed via the public telecommunication network. The data parameters are specified for the case where an ITU-T Recommendations V.90 i.24 and V.92 i.25, compliant modem is used since

26、 this kind of modem is in common use. EG 202 057-3 i.6 contains user related QoS parameter definitions and measurement methods specific to public land mobile networks (PLMN). EG 202 057-4 i.7 contains user related QoS parameter definitions and measurement methods specific to Internet access. The pre

27、sent document takes into account as far as practicable the following eight principles: 1) QoS parameters should be easily understood by the public, and be useful and important to them. 2) All parameters are applicable at the network termination point (where appropriate). 3) Where measurements are po

28、ssible they should be made on the customers premises, using in-service lines. NOTE: Literally principles 2 and 3 imply that all measurements should be carried out at the NTP, which would require co-operation by users and be excessively intrusive, as it would require many visits to the premises of us

29、ers. Measurements at the subscriber side of the local exchange (e.g. at the MDF or other possible connection point/distribution frame in the access network) generally give an adequate representation of the quality that would be perceived at the NTP for the parameters defined in the present document,

30、 and so this approach is used because it is more practicable and meets the underlying objectives of these principles. 4) To be as realistic as possible, real traffic rather than test calls should be used as a basis of the measurements, wherever possible. ETSI ETSI EG 202 057-2 V1.3.2 (2011-04) 65) P

31、arameters should be capable of verification by independent organizations. This verification might be made by direct measurements or by audit of service providers measurements. 6) The accuracy of QoS values should be set to a level consistent with measurement methods being as simple as possible with

32、costs as low as possible. 7) The parameters are designed for both statistical and individual application. The statistical values should be derived by the application of a simple statistical function to the individual values. The statistical function should be specified in this multi-part deliverable

33、. This multi-part deliverable should also contain guidelines on how statistically significant samples should be selected. 8) The statistical functions should be designed so QoS figures from different service providers can be compared easily by users and in particular consumers. ETSI ETSI EG 202 057-

34、2 V1.3.2 (2011-04) 71 Scope The present document contains definitions and measurement methods for a range of user perceivable Quality of Service (QoS) parameters. The purpose of these parameters is to define objective and comparable measures of the QoS delivered to users/customers for use by users/c

35、ustomers. The present document applies to any telecommunication service, however, some parameters may have a limited application. The present document is intended to provide a menu from which individual items can be selected. There is no obligation to use any or all of the parameters. The QoS parame

36、ters are related primarily to services and service features and not to the technology used to provide the services. Therefore the parameters should be capable of use when the services are provided on new technologies such as IP and ATM or other packet switched technologies as well as on circuit swit

37、ched technologies. The establishment of target values for QoS is beyond the scope of the present document. The QoS parameters listed in the present document are also not intended to assess the complete QoS of a telecommunication service. The present document provides a set of QoS parameters that cov

38、ers specific user related QoS aspects rather than a complete list of QoS parameters. This set has been chosen to address areas where monitoring of QoS is likely to be most worthwhile, i.e. the areas that are most likely to be affected by any QoS problems. If stakeholders wish to examine other QoS as

39、pects they are recommended to follow the general approach of the present document - as far as practicable - as a basis for the development of definitions and measurement methods for new specific QoS parameters. The set of QoS parameters is designed to be understood by the users of various telecommun

40、ications services. Sub-sets of these parameters can be selected for use in different circumstances. For example a specific parameter might be relevant for many users in some countries or markets but the same parameter might not be of relevance in others. Therefore stakeholders - users, customers, re

41、gulators, service providers, network operators and other parties interested in the use of QoS parameters - should decide in co-operation, which parameters and which measures should be used in their particular situation. This decision should take account of: The precise purpose for which they will be

42、 used. The general level of quality achieved by most operators/providers. The degree to which the parameters will provide a reliable comparison of performance. The cost of measuring and reporting each parameter. 2 References References are either specific (identified by date of publication and/or ed

43、ition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected lo

44、cation might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the pres

45、ent document. Not applicable. ETSI ETSI EG 202 057-2 V1.3.2 (2011-04) 82.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 ETSI EG 201 769: “Speech Processin

46、g, Transmission and Quality Aspects (STQ); QoS parameter definitions and measurements; Parameters for voice telephony service required under the ONP Voice Telephony Directive 98/10/EC“. i.2 ETSI ETS 300 905: “Digital cellular telecommunications system (Phase 2+) (GSM); Teleservices supported by a GS

47、M Public Land Mobile Network (PLMN) (GSM 02.03)“. i.3 ETSI EN 300 659 (all parts) : “Access and Terminals (AT); Analogue access to the Public Switched Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related) services“. i.4 ETSI EG 201 377-1: “Speech processing

48、, Transmission and Quality aspects (STQ); Specification and measurement of speech transmission quality; Part 1: Introduction to objective comparison measurement methods for one-way speech quality across networks“. i.5 ETSI EG 202 057-1: “Speech Processing, Transmission and Quality Aspects (STQ); Use

49、r related QoS parameter definitions and measurements; Part 1: General“. i.6 ETSI EG 202 057-3: “Speech Processing, Transmission and Quality Aspects (STQ); User related QoS parameter definitions and measurements; Part 3: QoS parameters specific to Public Land Mobile Networks (PLMN)“. i.7 ETSI EG 202 057-4: “Speech Processing, Transmission and Quality Aspects (STQ); User related QoS parameter definitions and measurements; Part 4: Internet access“. i.8 ETSI TR 101 949: “Speech Processing, Transmission and Quality Aspects (STQ); QoS parameter d