1、 ETSI TR 136 904 V12.0.0 (2016-01) LTE; Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Derivation of test tolerances for User Equipment (UE) radio reception conformance tests (3GPP TR 36.904 version 12.0.0 Release 12) floppy3TECH
2、NICAL REPORT ETSI ETSI TR 136 904 V12.0.0 (2016-01)13GPP TR 36.904 version 12.0.0 Release 12Reference RTR/TSGR-0536904vc00 Keywords LTE 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
3、 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 and/or print vers
4、ions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a spe
5、cific 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 status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find error
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7、t as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2016. All rights reserved. D
8、ECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GS
9、M Association. ETSI ETSI TR 136 904 V12.0.0 (2016-01)23GPP TR 36.904 version 12.0.0 Release 12Intellectual 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
10、 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 (h
11、ttps:/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 ETSI Web server) which are, or may be, or may become, es
12、sential to the present document. Foreword This Technical Report (TR) 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
13、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.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “wi
14、ll“, “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). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 136 904 V12.0.0 (2016-01)33GPP
15、 TR 36.904 version 12.0.0 Release 12Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definitions 5g33.2 Symbols 5g33.3 Abbreviations . 5g34 General Principles 6
16、g34.1 Principle of Superposition 6g34.2 Sensitivity analysis . 6g34.3 Statistical combination of uncertainties 6g34.4 Correlation between uncertainties 7g34.4.1 Uncorrelated uncertainties 7g34.4.2 Positively correlated uncertainties 7g34.4.3 Negatively correlated uncertainties . 8g34.4.4 Treatment o
17、f uncorrelated uncertainties . 9g34.4.5 Treatment of positively correlated uncertainties with adverse effect 9g34.4.6 Treatment of positively correlated uncertainties with beneficial effect 9g34.4.7 Treatment of negatively correlated uncertainties 9g35 Grouping of test cases defined in TS 36.521-1 9
18、g36 Determination of Test System Uncertainties 10g36.1 General . 10g36.2 Uncertainty figures . 11g37 Determination of Test Tolerances 11g37.1 General . 11g3Annex A: Derivation documents 12g3Annex B: Change History 13g3History 14g3ETSI ETSI TR 136 904 V12.0.0 (2016-01)43GPP TR 36.904 version 12.0.0 R
19、elease 12Foreword 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 approval. Should the TSG modify the contents of the present document, it w
20、ill 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 document under change control. y the
21、 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. Introduction ETSI ETSI TR 136 904 V12.0.0 (2016-01)53GPP TR 36.904 version 12.0.0 Re
22、lease 121 Scope The present document specifies a general method used to derive Test Tolerances for UE radio reception conformance tests in 3GPP TS 36.521-1 2, and establishes a system for relating the Test Tolerances to the measurement uncertainties of the Test System. The test cases which have been
23、 analysed to determine Test Tolerances are included as .zip files. The present document is applicable from Release 10 up to the release indicated on the front page of the present Terminal conformance specifications. 2 References The following documents contain provisions which, through reference in
24、this text, constitute provisions of the present document. - 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 appl
25、ies. 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 Release as the present document. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 36.521-1: “User Equipment (U
26、E) conformance specification, Radio transmission and reception Part 1: conformance testing“. 3 ETSI ETR 273-1-2: “Improvement of radiated methods of measurement (using test sites) and evaluation of the corresponding measurement uncertainties; Part 1: Uncertainties in the measurement of mobile radio
27、equipment characteristics; Sub-part 2: Examples and annexes“. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in TR 21.905 1 and the following apply. A term defined in the present document takes precedence over the de
28、finition of the same term, if any, in TR 21.905 1. Other definitions used in the present document are listed in 3GPP TS 36.521-1 2. 3.2 Symbols Symbols used in the present document are listed in 3GPP TR 21.905 1, 3GPP TS 36.521-1 2. 3.3 Abbreviations For the purposes of the present document, the abb
29、reviations given in TR 21.905 1 apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 1. Other abbreviations used in the present document are listed in 3GPP TS 36.521-1 2. ETSI ETSI TR 136 904 V12.0.0 (2016-01)63GPP
30、 TR 36.904 version 12.0.0 Release 124 General Principles 4.1 Principle of Superposition For multi-cell tests there are several cells each generating various Physical channels. In general cells are combined along with AWGN, so the signal and noise seen by the UE may be determined by more than one cel
31、l. Since several cells may contribute towards the overall power applied to the UE, a number of test system uncertainties affect the signal and noise seen by the UE. The aim of the superposition method is to vary each controllable parameter of the test system separately, and to establish its effect o
32、n the critical parameters as seen by the UE receiver. The superposition principle then allows the effect of each test system uncertainty to be added, to calculate the overall effect. The contributing test system uncertainties shall form a minimum set for the superposition principle to be applicable.
33、 4.2 Sensitivity analysis A change in any one channel level or channel ratio generated at source does not necessarily have a 1:1 effect at the UE. The effect of each controllable parameter of the test system on the critical parameters as seen by the UE receiver shall therefore be established. As a c
34、onsequence of the sensitivity scaling factors not necessarily being unity, the test system uncertainties cannot be directly applied as test tolerances to the critical parameters as seen by the UE. EXAMPLE: In many of the tests described, the s / Iotis one of the critical parameters at the UE. Scalin
35、g factors are used to model the sensitivity of the s / Iotto each test system uncertainty. When the scaling factors have been determined, the superposition principle then allows the effect of each test system uncertainty to be added, to give the overall variability in the critical parameters as seen
36、 at the UE. There are often constraints on several parameters at the UE. The aim of the sensitivity analysis, together with the acceptable test system uncertainties, is to ensure that the variability in each of these parameters is controlled within the limits necessary for the specification to apply
37、. The test has then been conducted under valid conditions. 4.3 Statistical combination of uncertainties The acceptable uncertainties of the test system are specified as the measurement uncertainty tolerance interval for a specific measurement that contains 95% of the performance of a population of t
38、est equipment, in accordance with 3GPP TS 36.521-1 2 clause F.1. In the UE radio reception conformance tests covered by the present document, the Test System shall enable the stimulus signals in the test case to be adjusted to within the specified range, with an uncertainty not exceeding the specifi
39、ed values. The method given in the present document combines the acceptable uncertainties of the test system, to give the overall variability in the critical parameters as seen at the UE. Since the process does not add any new uncertainties, the method of combination should be chosen to maintain the
40、 same tolerance interval for the combined uncertainty as is already specified for the contributing test system uncertainties. The basic principle for combining uncertainties is in accordance with ETR 273-1-2 3. In summary, the process requires 3 steps: a) Express the value of each contributing uncer
41、tainty as a one standard deviation figure, from knowledge of its numeric value and its distribution. b) Combine all the one standard deviation figures as root-sum-squares, to give the one standard deviation value for the combined uncertainty. c) Expand the combined uncertainty by a coverage factor,
42、according to the tolerance interval required. Provided that the contributing uncertainties have already been obtained using this method, using a coverage factor of 2, further stages of combination can be achieved by performing step b) alone, since steps a) and c) simply divide by 2 and multiply by 2
43、 respectively. The root-sum-squares method is therefore used to maintain the same tolerance interval for the combined uncertainty as is already specified for the contributing test system uncertainties. In some cases where correlation between contributing uncertainties has an adverse effect, the meth
44、od is modified in accordance with clause 4.4.5 of the present document. ETSI ETSI TR 136 904 V12.0.0 (2016-01)73GPP TR 36.904 version 12.0.0 Release 12In each analysis, the uncertainties are assumed to be uncorrelated, and are added result root-sum-square unless otherwise stated. The combination of
45、uncertainties is performed using dB values for simplicity. It has been shown that using dB uncertainty values gives a slightly worse combined uncertainty result than using linear values for the uncertainties. The analysis method therefore errs on the safe side. 4.4 Correlation between uncertainties
46、The statistical (root-sum-square) addition of uncertainties is based on the assumption that the uncertainties are independent of each other. For realisable test systems, the uncertainties may not be fully independent. The validity of the method used to add uncertainties depends on both the type of c
47、orrelation and on the way in which the uncertainties affect the test requirements. Clauses 4.4.1 to 4.4.3 give examples to illustrate different types of correlation. Clauses 4.4.4 to 4.4.7 show how the scenarios applicable to multi-cell RRM tests are treated. 4.4.1 Uncorrelated uncertainties The gra
48、ph shows an example of two test system uncertainties, A and B, which affect a test requirement. Each sample from a population of test systems has a specific value of error in parameter A, and a specific value of error in parameter B. Each dot on the graph represents a sample from a population of tes
49、t systems, and is plotted according to its error values for parameters A and B. Error inparameter AError inparameter BFigure 4.4.1.1: Example of two test system uncertainties affecting a test requirement It can be seen that a positive value of error in parameter A, for example, is equally likely to occur with either a positive or a negative value of error in parameter B. This is expected when two parameters are uncorrelated, such as two uncertainties which arise from different and unrelated parts of the test system. 4.4.2 Positively correlated un
