ETSI TR 137 902 V12.1.0 (2015-02)

Universal Mobile Telecommunications System (UMTS); LTE; Measurements of User Equipment (UE) radio performances for LTE/UMTS terminals; Total Radiated Power (TRP) and Total Radiated Sensitivity (TRS) test methodology (3GPP TR 37.902 version 12.1.0 Release 12)

RTR/TSGR-0437902vc10

General Information

• Status: Published
• Publication Date: 03-Feb-2015
• Technical Committee: 3GPP RAN 4 - Specification for radio performance
• Current Stage: 12 - Completion
• Completion Date: 04-Feb-2015

Standards Content (Sample)

TECHNICAL REPORT
Universal Mobile Telecommunications System (UMTS);
LTE;
Measurements of User Equipment (UE)
radio performances for LTE/UMTS terminals;
Total Radiated Power (TRP)
and Total Radiated Sensitivity (TRS) test methodology
(3GPP TR 37.902 version 12.1.0 Release 12)

3GPP TR 37.902 version 12.1.0 Release 12 1 ETSI TR 137 902 V12.1.0 (2015-02)

Reference
RTR/TSGR-0437902vc10
Keywords
LTE,UMTS
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© European Telecommunications Standards Institute 2015.
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3GPP TR 37.902 version 12.1.0 Release 12 2 ETSI TR 137 902 V12.1.0 (2015-02)
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 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 Secretariat. Latest updates are available on the ETSI Web
server (http://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, essential 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 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", "may not", "need", "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).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
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3GPP TR 37.902 version 12.1.0 Release 12 3 ETSI TR 137 902 V12.1.0 (2015-02)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 4
Introduction . 4
1 Scope . 5
2 References . 5
3 Definitions, symbols and abbreviations . 5
3.1 Definitions . 5
3.2 Symbols . 5
3.3 Abbreviations . 6
4 General . 6
4.1 Scope . 7
4.2 Device Under Test definition . 8
5 Measurement environment condition . 8
5.1 Chamber environment constraints . 8
5.2 Positioning Requirements and Coordinate system . 8
5.3 DUT Test Positions and Phantom Specifications . 8
5.3.1 Phantom Specifications . 8
5.3.2 DUT Test Positions . 8
6 Measurement parameters . 8
6.1 Definition of the Total Radiated Power . 8
6.2 Definition of Total Radiated Sensitivity . 9
6.2.1 Total Radiated Sensitivity . 9
6.2.2 Alternate measurement parameter . 9
6.3 Sampling grid and independent samples . 9
6.4 Measurement frequencies . 9
7 Measurement procedure – transmitter performance . 15
7.1 General measurement arrangements . 16
7.2 Procedure for radiated power measurement . 16
7.3 Calibration measurement . 17
8 Measurement procedure – receiver performance . 17
8.1 General measurement arrangements . 17
8.2 Procedure for radiated sensitivity measurement . 17
8.3 Calibration measurement . 18
Annex A: System Parameters. 19
A.1 Definition and applicability . 19
A.2 Establishing the connection . 19
A.3 Uplink RB allocation for reference sensitivity . 19
Annex B: Measurement Uncertainty . 21
Annex C: Anechoic chamber specifications and validation method. 22
Annex D: Reverberation chamber specifications and validation method . 23
Annex E: Change history . 24
History . 25

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3GPP TR 37.902 version 12.1.0 Release 12 4 ETSI TR 137 902 V12.1.0 (2015-02)
Foreword
rd
This Technical Report has been produced by the 3 Generation 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 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 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.
Introduction
In this technical report, the needed modifications to measurement parameters for LTE devices will be studied and
applicability of the existing measurement procedures, e.g. TRP and TRS will be evaluated for LTE devices with
multiple receive antennas TDD-LTE and FDD-LTE terminals (as it is expected that the same issues are applicable
independent of RAT). As UMTS devices with multiple receive antennas are still needing test methodology, it is easy to
extend to this study item contribution to UMTS terminals with, due to similar situation and technical issue. UMTS TRP
and TRS test methods should also be updated in the same way.
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1 Scope
The present document is a Technical Report of the Study Item for OTA TRP and TRS requirement of LTE terminals,
which was approved at TSG RAN #55 [2]. The report provides the measurement procedure of Over The Air TRP and
TRS requirements for LTE terminals. It will make a simple extension to the UE OTA TRP and TRS test methods
TS34.114[3] for LTE UE with multiple receive antennas, without considering all of the aspects associated with spatial
channels. The work should utilise the existing environments in TR25.914[4]. The results of the UE OTA test method
with Head and Hand Phantoms study item can be considered later on once finalized. The report also provides some
future extensions and work items after LTE TRP and TRS methods mature.
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-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
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] RP-120412, "New study item proposal: Measurements of radio performances for LTE terminals -
conformance testing methodology".
[3] 3GPP TS 34.114: "User Equipment (UE) / Mobile Station (MS) Over The Air (OTA) antenna
performance".
[4] 3GPP TR 25.914: "Measurements of radio performances for UMTS terminals in speech mode".
[5] 3GPP TS 36.101: "Evolved Universal Terrestrial Radio Access (E-UTRA) User Equipment (UE)
radio transmission and reception".
[6] 3GPP TS 36.521-1: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment
(UE) conformance specification; Radio transmission and reception; Part 1: conformance testing".
[7] RP-120368, "Verification of radiated multi-antenna reception performance of UEs in LTE/UMTS
WID".
3 Definitions, symbols and abbreviations
3.1 Definitions
Void
3.2 Symbols
For the purposes of the present document, the following symbols apply:
θ Zenith angle in the spherical co-ordinate system
φ Azimuth angle in the spherical co-ordinate system
Ω Solid angle defined at the phase centre of the DUT
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Gψ(θ,φ,f) Antenna gain pattern in the ψ-polarization as function of the spherical co-ordinates and the carrier
frequency
F Carrier frequency
Ptr Transmitted power
Qψ(θ,φ,f) Angular power distribution in the ψ-polarization as function of the spherical co-ordinates and the
carrier frequency
dB decibel
dBm dB referenced to one milliwatt
m meter
mm millimetre
kbps kilobit per second
ms millisecond
MHz megahertz
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following apply. An
abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in
TR 21.905 [1].
3G 3rd Generation
3GPP 3G Partnership Project
3-D Three Dimensional
16QAM 16 Quadrature Amplitude Modulation
A-MPR Additional Maximum Power Reduction
BS Base Station
CN Core Network
DL Downlink
DUT Device Under Test
ETSI European Telecommunications Standards Institute
E-UTRA Evolved Universal Terrestrial Radio Access
LME Laptop Mounted Equipment
LEE Laptop Embedded Equipment
LTE Long Term Evolution
MPR Maximum Power Reduction
MS Mobile Station
NB Node B
QoS Quality of Service
QPSK Quadrature Phase Shift Keying (modulation)
RAB Radio Access Bearer
RAN Radio Access Network
RB Resource Block
RF Radio Frequency
Rx Receiver
RBstart RB number where a RB allocation begins within the channel
SAM Specific Anthropomorphic Mannequin
Tx Transmitter
TRP Total Radiated Power
TRS Total Radiated Sensitivity (also: Total Isotropic Sensitivity)
UL Uplink
UE User Equipment
UTRA Universal Terrestrial Radio Access

4 General
The present document is a Technical Report of the Study Item for OTA TRP and TRS requirement of LTE terminals,
which was approved at TSG RAN #55 [2]. The report provides the measurement procedure of Over The Air TRP and
TRS requirements for LTE terminals. It will make a simple extension to the UE OTA TRP and TRS test methods TR
25.914[4] for LTE UE with multiple receive antennas, without considering all of the aspects associated with spatial
channels. The work should utilise the existing environments in TR 25.914[4]. The results of the UE OTA test method
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3GPP TR 37.902 version 12.1.0 Release 12 7 ETSI TR 137 902 V12.1.0 (2015-02)
with Head and Hand Phantoms study item can be considered later on once finalized. The report also provides some
future extensions and work items after LTE TRP and TRS methods mature.
4.1 Scope
The measurement procedure explained in this document applies to all LTE devices, which are already satisfied the
standard 3GPP LTE RF minimum performance requirements and conformance testing defined in 3GPP TS 36.101:
Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception[5] and
3GPP TS 36.521-1: Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) conformance
specification; Radio transmission and reception; Part 1: conformance testing[6], respectively.
The testing methodology applies to any 4G LTE handset, USB-dongle and LEE etc, with internal or external antenna.
3GPP TR 25.914[4] has done many meaningful studies for evaluating antenna performance of UMTS and GSM
terminals. In this document, the majority work will be focus on the LTE TRP and TRS test. A simple test methodology
for LTE devices without channel emulator will be studied.
The radio tests considered here are:
1. The measurement of the radiated output power (TRP)
2. The measurement of the radiated sensitivity (TRS)
The test procedure described in this document measures the performance of the transmitter and the receiver, including
the antenna and also the effects of the user.
The purpose of this document is to serve as a standard test procedure for radio performance testing of 4G LTE mobile
terminals. It is the intention that this procedure is going to be used by test houses, network operators, mobile terminal
and antenna manufacturers, research institutes etc. The motivation for the development of this document is the lack of
standards in this area in 3GPP.
During RAN4 #62bis following proposal were agreed.
Proposal 1: LTE TRP test method is the same for all LTE UEs independent of release, including e.g. LTE CA,
UL TX Div or UL MIMO capable UEs
Proposal 2: LTE TRS test method is the same for all LTE UEs independent of release, including e.g. LTE CA,
UL TX Div or UL MIMO capable UEs
Proposal 3: In the first phase re-use test environments including phantoms available already in TS34.114 for
LTE TPR and TRS purposes as well. Once new methods like hand phantom based test environments are
defined for UTRA TRP and TRS, then also LTE TRP and TRS testing should be extended to these additional
environments.
During RAN4 #63 following proposal were agreed.
WF 1: Select one channel bandwidth per band for TRP and TRS tests for LTE FDD and TDD. Default channel
bandwidth is 10 MHz but another bandwidth can be considered on case by case basis.
WF2: For TRS select the reference measurement channel configuration for LTE FDD and TDD as defined for
the conducted REFSENS minimum requirements and adopt UL allocation per band as defined in 36.101 Table
7.3.1-2 [5]. TRS is measured on low, mid and high channel.
WF3: For TRP select the UL reference measurement channel configuration as in conductive maximum output
power test and the UL allocation for LTE FDD and TDD per band as shown in a table 1 below. Bands that are
not covered in Table 1 will be addressed as well.
WF4: Select combined LTE TRS measurement in order to make the test method available for all LTE devices
starting from Release 8. (Note: further enhancements for radiated UE receiver verifications are developed
under the MIMO OTA WI in RP-120368 [7] and therefore combined LTE TRS test method may eventually be
revisited.)
WF5: Given that existing TRP and TRS measurement procedures for UMTS terminals in speech mode specify
two alternate testing methodologies (i.e. anechoic and reverb) [4], the standardization of two TRP/TRS testing
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methodologies for LTE UEs may be one eventual outcome, and RAN4 shall take the view to avoid differences
in the absolute test results.
4.2 Device Under Test definition
Handset: the UE/MS used under the "Speech mode" or 'Browsing mode' conditions that correspond to predefined
positions (see Chapter 5.1.6 in [4] for 'Speech mode' and Chapter 5.1.7 in [4] for 'Browsing mode') for voice or data
application when the handset is held close to the user.
Laptop Embedded Equipment : the equipment with a wireless device embedded inside, e.g. notebook and tablet .The
corresponding predefined positions for 'data mode' application are defined in Chapter 5.3.1 in [4] for notebooks and
Chapter 5.3.2 in [4] for tablets.
Laptop Mounted Equipment : the plug-in type device that host on the laptop, e.g. USB-dongle, that correspond to
predefined positions (see Chapter 5.1.4 in [4]) for 'data mode' application.
5 Measurement environment condition
5.1 Chamber environment constraints
Chamber environment constraints shall be the same as described in TR25.914[4] unless otherwise defined in this TR.
This TR only defines differences compared to TR25.914[4].
5.2 Positioning Requirements and Coordinate system
Positioning Requirements and Coordinate system shall be the same as described in TR25.914[4] unless otherwise
defined in this TR. This TR only defines differences compared to TR25.914[4].
5.3 DUT Test Positions and Phantom Specifications
5.3.1 Phantom Specifications
Phantom Specifications shall be the same as described in TR25.914[4] unless otherwise defined in this TR. This TR
only defines differences compared to TR25.914[4].
5.3.2 DUT Test Positions
DUT Test Positions shall be the same as described in TR25.914[4] unless otherwise defined in this TR. This TR only
defines differences compared to TR25.914[4].
6 Measurement parameters
Measurement parameters shall be the same as described in TR25.914[4] unless otherwise defined in this TR. This TR
only defines differences compared to TR25.914[4].
6.1 Definition of the Total Radiated Power
This definition will be used to calculate the TRP value of LTE DUT. See section 6.1 and E.2.1 in TR25.914[4].
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6.2 Definition of Total Radiated Sensitivity
6.2.1 Total Radiated Sensitivity
This definition will be used to calculate the TRS value of LTE DUT. See section 6.5 and E.2.2 in TR25.914[4].
6.2.2 Alternate measurement parameter
6.3 Sampling grid and independent samples
For the anechoic chamber based measurement procedures the measurement of TRP is basically based on the
measurement of the spherical radiation pattern of the Device Under Test . The power radiated by the DUT is sampled in
far field in a group of points located on a spherical surface enclosing the DUT. The samples of TRP are taken using a
constant sample step of 15° both in theta (θ) and phi (φ) directions.
The measurement of TRS is basically based on the measurement of the spherical sensitivity pattern of the Device Under
Test. The sensitivity values of the DUT at a predefined BLER level are sampled in far field in a group of points located
on a spherical surface enclosing the DUT. The samples of TRS are taken using a constant sample step of 30° both in
theta (θ) and phi (φ) directions.
All the samples are taken with two orthogonal linear polarizations, θ - and ϕ -polarisations. It is also possible to
measure some other polarisation components, if it is possible to recover θ - and ϕ -polarisations from the measured
data by some technique.
For the reverberation chamber based measurement procedures the measurement of TRP is basically based on sampling
the radiated power of the Device-Under-Test for a discrete number of field combinations in the chamber. The average
value of these statistically distributed samples is proportional to the Total Radiated Power, and by calibrating the
average power transfer function in the chamber, an absolute value of the TRP can be obtained. The samples of TRP are
taken so that a minimum of 100 independent Rayleigh faded samples are measured, as per section 5.1.3 in TS34.114[3].
The measurement of TRS is basically based on searching for the lowest power received by the Device Under Test for a
discrete number of field combinations in the chamber. The power received by the DUT at each discrete field
combination that provides a BLER which is better than the specified target BLER level shall be averaged with other
such measurements using different field combinations. By calibrating the average power transfer function, an absolute
value of the TRS can be obtained when the linear values of all
...