1、 ETSI EG 202 057-3 V1.1.1 (2005-04)ETSI Guide Speech Processing, Transmission and Quality Aspects (STQ);User related QoS parameter definitions and measurements;Part 3: QoS parameters specific toPublic Land Mobile Networks (PLMN)ETSI ETSI EG 202 057-3 V1.1.1 (2005-04) 2 Reference DEG/STQ-00031 Keywor
2、ds mobile, QoS, quality, user 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 copies
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6、s authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMan
7、d the TIPHON logo are Trade Marks currently being registered by ETSI 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. ETSI ETSI EG 202 057-3 V1.1.1 (2005-04) 3 Contents Intellectual Property Rights4 Fore
8、word.4 1 Scope 6 2 References 7 3 Definitions and abbreviations.7 3.1 Definitions7 3.2 Abbreviations .7 4 General considerations .8 4.1 Services covered.8 4.2 Use of the parameters .8 4.3 Reporting for different classes of customers 9 4.4 Differences in levels of QoS.9 4.5 Reporting for directly and
9、 indirectly served customers9 4.6 Data processing issues9 4.7 Data collection period 9 4.8 Sampling and test calls .9 4.9 Comparability of measurements.9 4.10 Publication of QoS parameters.10 5 The use of drive round tests versus measurements based on network element counters .10 6 QoS parameters sp
10、ecific to PLMNs .11 6.1 General .11 6.2 Considerations on drive-round tests .12 6.3 Considerations on measurements based on network element counters 12 6.4 QoS parameters 12 6.4.1 Unsuccessful call ratio for telephony12 6.4.1.1 Definition 12 6.4.1.2 Measurement and statistics .13 6.4.2 Dropped call
11、ratio .13 6.4.2.1 Definition 13 6.4.2.2 Measurement and statistics .13 Annex A (informative): Design of drive round surveys 14 Annex B (informative): Measurements based on network element counters .15 B.1 Service accessibility: Unsuccessful call ratio.15 B.2 Service retainability: Dropped calls rati
12、o.15 Annex C (informative): Bibliography.17 History 18 ETSI ETSI EG 202 057-3 V1.1.1 (2005-04) 4 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 availa
13、ble 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
14、 (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,
15、or may become, essential to the present document. Foreword This ETSI Guide (EG) has been produced by ETSI Technical Committee Speech Processing, Transmission and Quality Aspects (STQ). The present document is part 3 of a multi-part deliverable covering Speech Processing, Transmission and Quality Asp
16、ects (STQ); User related QoS parameter definitions and measurements, as identified below: Part 1: “General“; Part 2: “Voice telephony, Group 3 fax and modem data services“; Part 3: “QoS parameters specific to Public Land Mobile Networks (PLMN)“. Part 1 contains general user related QoS parameter def
17、initions and measurement methods that can be applied to any service. The present document contains user related QoS parameter definitions and measurement methods for voice, data and fax services accessed via the public telecommunication network. Part 2 contains user related QoS parameter definitions
18、 and measurement methods for voice, data and fax services accessed via the public telecommunication network. The data parameters are specified for the case where a V.9x series modem is used since this kind of modem is in common use. Part 3 (the present document) contains user related QoS parameter d
19、efinitions and measurement methods specific to public mobile telecommunication networks (PLMN). The present 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 param
20、eters are applicable at the network termination point (where appropriate). 3) Where measurements are possible they should be made on the customers premises, using in-service lines. NOTE: Literally principles 2 and 3 imply that all measurements must be carried out at the NTP. However, the NTP in PLMN
21、s is not precisely defined. Other methods must be used to achieve an adequate representation of the quality that would be perceived at the NTP for the parameters defined in the present document. 4) To be as realistic as possible, real traffic rather than test calls should be used as a basis of the m
22、easurements, wherever possible. 5) Parameters 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 metho
23、ds being as simple as possible with costs as low as possible. ETSI ETSI EG 202 057-3 V1.1.1 (2005-04) 5 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 value
24、s. The statistical function should be specified in the standard. The present document 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
25、users and in particular consumers. ETSI ETSI EG 202 057-3 V1.1.1 (2005-04) 6 1 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 o
26、f the QoS delivered to users/customers for use by users/customers. The present document applies to any telecommunication service however some parameters may have a limited application. The Guide is intended to provide a menu from which individual items can be selected. There is no obligation to use
27、any or all of the parameters. The QoS parameters 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 packet switched technologies as
28、 well as on circuit switched technologies. The establishment of target values for QoS is outside 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 o
29、f QoS parameters that covers 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 wis
30、h to examine other QoS aspects 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 us
31、ers of various telecommunications 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 stakeholde
32、rs - users, customers, regulators, service providers, network operators and other parties interested in the use of QoS parameters - should decide in co-operation, which parameters should be used in their particular situation. This decision should take account of: - The precise purpose for which they
33、 will be used. - The general level of quality achieved by most operators. - The degree to which the parameters will provide a reliable comparison of performance. - The cost of measuring and reporting each parameter. Part 1 contains general user related QoS parameter definitions and measurement metho
34、ds that can be applied to any telecommunications service. The QoS parameters in part 1 are focused on non call related QoS aspects. Additional parts of the present document will contain service specific user related QoS parameter definitions and measurement methods. Part 2 contains user related QoS
35、parameter definitions and measurement methods for voice, data and fax services accessed via public telecommunication networks. The QoS parameters in part 2 are focused on call related QoS aspects. The data parameters are specified for the case where a V.9x series modem is used. Part 3 (the present d
36、ocument) contains user related QoS parameter definitions and measurement methods specific to Public Land Mobile Networks (PLMN). The present document includes the parameters unsuccessful call ratio and dropped call ratio even though they would logically be covered in part 2. The reasons for their in
37、clusion in the present document are: - These parameters are more important for mobile networks than the other call related parameters covered in part 2 and their inclusion makes the present document more self contained. - Dropped call ratio is not included in part 2 because when part 2 was written t
38、he main focus was on fixed networks where this parameter is much less important than in mobile networks. ETSI ETSI EG 202 057-3 V1.1.1 (2005-04) 7 The parameters in the present document apply to call related services but not to Internet access provided by GPRS or later technologies. For some of the
39、parameters in the present document, alternative measurement methods are given based either on drive round tests and or on network element counters. Each method has its own advantages and disadvantages and the results of one approach are not comparable with the results of the other approach, and ther
40、efore, if comparability is needed, operators and regulators should decide which approach should be used in their country and all network operators should use the same approach. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the
41、 present document. References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not fou
42、nd to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 ETSI TS 102 250: “Speech Processing, Transmission and Quality Aspects (STQ); QoS aspects for popular services in GSM and 3G networks“. 3 Definitions and abbreviations 3.1 Definitions For the pur
43、poses of the present document, the following term and definition applies: mobile service: The term mobile service is used for various telecommunication services when access via a PLMN is provided. NOTE: Since the purpose of the present document is to formulate definitions for QoS parameters, these d
44、efinitions are given in the main body of the text and are not repeated here. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: GPRS General Packet Radio Service ISDN Integrated Services Digital Network NTP Network Termination Point PLMN Public Land Mobile
45、 Network PSTN Public Switched Telephone Network QoS Quality of Service ETSI ETSI EG 202 057-3 V1.1.1 (2005-04) 8 4 General considerations 4.1 Services covered The present document applies exclusively to call related services provided on mobile networks, but not to Internet access provided by GPRS or
46、 later technologies. The parameters are end-user/customer and end-to-end orientated and are not intended to address the quality of interconnection services explicitly. Where test calls are made the numbers called may be chosen to include or exclude interconnection depending on the purposes of the te
47、sts. In many cases the provider of telecommunications services to the customer may depend on other providers for part of the service. An example is an international call where several service providers are normally involved. In such cases the provider of the service to the customer is responsible fo
48、r all elements for which it receives payment from the customer. In order to provide satisfactory QoS, this service provider will need to try to ensure that adequate QoS is provided by the other interconnected service providers. QoS figures for the responsible service provider will reflect both its o
49、wn capability and that of the interconnected service providers. 4.2 Use of the parameters Quality of service parameters are used for various purposes including: Specifying the level of quality of service in customer telecommunication service contracts or in the description or terms and conditions of the service. Comparing the quality of service of different service providers. Comparing the quality of service aspects of different service offers. Preparing long term studies on the quality of service aspects of a specific service. Care should be taken, however, o
