ETSI TS 102 250-4 V2.3.1 (2019-11)

Speech and multimedia Transmission Quality (STQ); QoS aspects for popular services in mobile networks; Part 4: Requirements for Quality of Service measurement equipment

RTS/STQ-00224-4m

General Information

• Status: Published
• Publication Date: 11-Nov-2019
• Technical Committee: STQ MOBILE - STQ Mobile
• Current Stage: 12 - Completion
• Due Date: 09-Nov-2019
• Completion Date: 12-Nov-2019

Standards Content (Sample)

TECHNICAL SPECIFICATION
Speech and multimedia Transmission Quality (STQ);
QoS aspects for popular services in mobile networks;
Part 4: Requirements for Quality of Service
measurement equipment

2 ETSI TS 102 250-4 V2.3.1 (2019-11)

Reference
RTS/STQ-00224-4m
Keywords
3G, GSM, network, QoS, service, speech
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture 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 versions 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 prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
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
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except 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.

© ETSI 2019.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners. ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 ETSI TS 102 250-4 V2.3.1 (2019-11)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Overview . 9
4.1 General Aspects . 9
4.2 Considerations on trigger points . 10
5 General requirements . 11
5.1 General requirement for data logging . 11
5.2 Overview . 11
5.3 Required information for logging . 11
5.3.1 Information on Measurement Setup . 11
5.3.1.1 General Information . 11
5.3.1.2 Information on User Equipment in use . 12
5.3.1.3 Information on Store-And-Forward Setups . 12
5.3.1.4 Information on Data Test Setups . 13
5.3.2 Measurement Data . 13
5.3.3 Status Information . 13
5.3.4 Trigger Points . 13
5.3.5 QoS Parameters . 13
5.4 Test-UE . 13
5.5 Antennas . 13
5.6 Controller/processor/storage. 14
5.7 Man Machine Interface (MMI) . 14
5.7.1 Local Controlled Systems . 14
5.7.2 Remote Controlled Systems . 14
5.8 Time sources . 14
5.9 Environmental conditions . 14
6 Fixed QoS Test-equipment (FQT) . 15
6.1 General . 15
6.2 Controller . 15
6.3 Time-sources . 15
6.4 Environmental conditions . 15
6.5 FQT for Telephony Measurements. 15
6.5.1 Common Aspects . 15
6.5.2 Telephony Speech . 15
6.5.3 Telephony Video . 16
6.6 FQT for store-and-forward services . 16
6.6.1 Overview and Common Aspects . 16
6.7 FQT for Data Measurements . 16
7 Mobile QoS Test-equipment (MQT) . 16
7.1 General . 16
7.2 Controller . 16
7.3 Geographical positioning . 17
ETSI
4 ETSI TS 102 250-4 V2.3.1 (2019-11)
7.3.1 Format of geographical co-ordinates . 17
7.3.2 Accuracy . 17
7.4 Time-sources . 17
7.5 Environmental conditions . 17
7.6 MQT for Telephony Measurements . 17
7.6.1 Common Aspects . 17
7.6.2 Telephony Speech . 18
7.6.3 Telephony Video: . 18
7.7 MQT for store-and-forward services . 18
7.8 MQT for Data Measurements . 18
7.8.1 Common Aspects . 18
7.8.2 MQT for FTP . 18
7.8.3 MQT for E-Mail . 18
7.8.4 MQT for HTTP . 18
7.8.5 MQT for WAP . 19
7.8.6 MQT for streaming services . 19
8 Mobile based measurement equipment . 19
Annex A (informative): QoS parameter export . 20
A.1 Overview . 20
A.2 XML Bodies . 20
A.2.1 . 20
A.2.2 Configuration . 22
A.2.2.1 . 22
A.2.2.2 . 22
A.2.2.3 . 22
A.2.2.4 . 23
A.2.2.5 . 23
A.2.3 Measurement Results . 24
A.2.3.1 . 24
A.2.3.2 . 24
A.2.3.3 . 25
A.2.3.4 . 25
A.2.3.5 . 26
A.2.4 Data Dictionary . 27
A.2.4.1 Overview . 27
A.2.4.2 GPS . 27
A.2.4.3 GSM. 28
A.2.4.4 UMTS . 29
A.2.4.5 Layer 3 Message PDU Types . 31
A.2.4.6 HSDPA . 33
A.2.4.7 HSUPA . 34
A.3 Schema . 38
A.4 Example . 38
Annex B (informative): RF COMBINER . 39
B.1 What is blocking? . 39
B.2 Which parameters have an impact on the effect of blocking? . 39
B.3 The Standards . 39
B.4 The Situation . 40
B.4.1 One test mobile transmits, the other one receives . 40
B.4.2 Antennas on the roof of a car . 40
B.4.3 Conclusion . 40
B.5 Possible Solutions . 41
B.5.1 Overview - Attenuators . 41
B.5.2 Recommendations . 41
ETSI
5 ETSI TS 102 250-4 V2.3.1 (2019-11)
B.5.2.1 Benchmarking tests . 41
B.5.2.2 Coverage tests . 41
B.5.3 Other equipment involved . 41
B.5.3.1 Scanners . 41
B.5.3.2 GPS receiver 1,2/1,5 GHz . 41
B.5.3.3 Risk for Scanner and GPS receiver . 41
B.5.4 Mixed Service GSM/WCDMA . 41
Annex C (informative): Bibliography . 42
History . 43

ETSI
6 ETSI TS 102 250-4 V2.3.1 (2019-11)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (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 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 property 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 Specification (TS) has been produced by ETSI Technical Committee Speech and multimedia
Transmission Quality (STQ).
The present document is part 4 of a multi-part deliverable. Full details of the entire series can be found in part 1 [2].
Modal verbs terminology
In the present document "shall", "shall not", "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 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.
Introduction
All the defined quality of service parameters and their computations are based on field measurements. That indicates
that the measurements were made from users point of view (full End-to-end perspective, taking into account the needs
of testing).
It is assumed that the end user can handle his user equipment and the services he wants to use (operability is not
evaluated at this time). For the purpose of measurement it is assumed that:
• the service is not barred for any reason;
• routing is defined correctly without errors; and
• the target subscriber equipment is ready to process the service request.
Speech and video quality values measured should only be applied by calls ended successfully for statistical analysis.
However, measured values from calls ended unsuccessfully (dropped) should be available for additional evaluations and
therefore, need to be stored.
Further preconditions may apply when reasonable.
ETSI
7 ETSI TS 102 250-4 V2.3.1 (2019-11)
1 Scope
The present document defines the minimum requirements of QoS measurement equipment for digital wireless networks
in the way that the values and trigger-points needed to compute the QoS parameter as defined in ETSI TS 102 250-2 [3]
can be measured following the procedures defined in ETSI TS 102 250-3 [4].
Test-equipment fulfilling the specified minimum requirements, will allow performing the proposed measurements in a
reliable and reproducible way.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition 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 location might be found at
https://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.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 100 910: "Digital cellular telecommunications system (Phase 2+); Radio Transmission
and Reception (3GPP TS 05.05)".
[2] ETSI TS 102 250-1: "Speech and multimedia Transmission Quality (STQ); QoS aspects for
popular services in mobile networks; Part 1: Assessment of Quality of Service".
[3] ETSI TS 102 250-2: "Speech and multimedia Transmission Quality (STQ); QoS aspects for
popular services in mobile networks; Part 2: Definition of Quality of Service parameters and their
computation".
[4] ETSI TS 102 250-3: " Speech and multimedia Transmission Quality (STQ); QoS aspects for
popular services in mobile networks; Part 3: Typical procedures for Quality of Service
measurement equipment".
[5] ETSI TS 102 250-5: "Speech and multimedia Transmission Quality (STQ); QoS aspects for
popular services in mobile networks; Part 5: Definition of typical measurement profiles".
[6] Void.
[7] Void.
[8] ETSI ETS 300 607-1: "Digital cellular telecommunications system (Phase 2) (GSM); Mobile
Station (MS) conformance specification; Part 1: Conformance specification; (GSM 11.10-1
version 4.28.1)".
[9] ETSI TS 125 101: "Universal Mobile Telecommunications System (UMTS); User Equipment
(UE) radio transmission and reception (FDD) (3GPP TS 25.101)".
[10] ETSI TS 127 007: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; AT command set for User Equipment (UE) (3GPP
TS 27.00".
[11] ETSI TS 127 005: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Use of Data Terminal Equipment - Data Circuit
terminating Equipment (DTE-DCE) interface for Short Message Service (SMS) and Cell
Broadcast Service (CBS) (3GPP TS 27.005)".
ETSI
8 ETSI TS 102 250-4 V2.3.1 (2019-11)
[12] ETSI EN 300 392-5: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D) and Direct
Mode Operation (DMO); Part 5: Peripheral Equipment Interface (PEI)".
[13] Void.
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
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 TR 102 581: "Speech Processing, Transmission and Quality Aspects (STQ); A Study on the
Minimum Additional Required Attenuation on the Antenna Path of the Field Test Equipment".
3 Definition of terms, symbols and abbreviations
3.1 Terms
Void.
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
rd
3GPP 3 Generation Partnership Project
CI Cell Identity
CTR Controller
FQT Fixed QoS Test equipment
FTP File Transfer Protocol
GPS General Positioning System
GSM Global System for Mobile communication
HTTP HyperText Transfer Protocol
IMAP Internet Message Access Protocol
IMEI International Mobile Equipment Identity
IMSI International Mobile Station Identifier
IP Internet Protocol
ISDN International Subscriber Digital Network
LAC Location Area Code
LC Local Control
MCC Mobile Country Code
MMI Man Machine Interface
MNC Mobile Network Code
MQT Mobile QoS Test equipment
MQT-LC Mobile QoS Test equipment Local Control
MQT-RC Mobile QoS Test equipment Remote Control
MSC Mobile Switching Centre
MSN Mobile Station Number
ETSI
9 ETSI TS 102 250-4 V2.3.1 (2019-11)
PC Personal Computer
PDN Packet Data Network
PMN Public Mobile Network
POP3 Post Office Protocol version 3
PROC Processor
PSTN Public Switching Telephone Network
PWR Power Supply
QoS Quality of Service
QSI Quality Sequence Indicator
RC Remote Control
RF Radio Frequency
RNC Radio Network Controller
SIM Subscriber Identity Module
SMS Short Message Service
SMSC Short Message Service Centre
SMTP Simple Mail Transfer Protocol
TCP Transmission Control Protocol
TETRA TErrestrial Trunked RAdio
TS TimeSlot
UE User Equipment
UMTS Universal Mobile Telecommunications System
UTC Coordinated Universal Time
WAP Wireless Application Protocol
WCDMA Wide band Code Division Multiple Access
WGS-84 World Geodetic System 1984
XML eXtended Mark-up Language
4 Overview
4.1 General Aspects
All tests are based on emulation of a typical user using services provided in a public mobile network (PMN). All of the
services to be tested (see ETSI TS 102 250-2 [3]) can be emulated by the Mobile QoS Test-equipment (MQT) which
can be installed in a vehicle, can be carried around by a pedestrian or is installed for semi-stationary use (e.g. office
environment).
Test scenarios need to distinguish the following principal user cases.
1) User-to-user services (typically telephony).
2) Store-and-forward services (e.g. SMS).
3) Information services (e.g. accessing the internet or FTP download).
4) Push services.
ETSI
10 ETSI TS 102 250-4 V2.3.1 (2019-11)

Figure 1: QoS test scenario overview
Some of the services require test-equipment connected to a non-mobile network emulating the counterpart of the typical
mobile user or the host offering the service. This part will be called Fixed QoS Test-equipment (FQT). The FQT may be
connected via a public network (PSTN, ISDN, PDN) or via a network internal connection point (e.g. at MSC). The FQT
for type 3) and 4) services could be composed as a (virtual) Internet Service Provider.
Below, requirements will be described on a per scenario basis. Those requirements not belonging to a specific scenario,
e.g. antenna requirements will be grouped together.
Depending on how far the MQT can be automated, the following subtypes are distinguished:
• MQT-LC: local control and operation; or
• MQT-RC: remote control and operation.
Although the same type of classification (-LC or -RC) can be made for FQT, most of the FQT are remote controlled.
4.2 Considerations on trigger points
Without loss of generality it can be assumed that any feasible test equipment will contain some kind of communication
terminal (UE) which may be a special type (e.g. a Trace Phone) or a standard UE. Also, it can be assumed that each
such device will provide information from different communication layers, from Application Layer (close to the user
interface) down to lower layers, e.g. operating-system events, TCP/IP layer, or Layer 3 signalling information, which is
used as trigger points for QOS PARAMETERS processing.
When considering the event chain, action is typically triggered by some emulated user action which finally causes some
action on the air interface. This process of event propagation is deterministic, allowing some kind of mapping between
layers, in the limits of available information, but will inevitably be associated with some communication and processing
delay in each stage.
Therefore, choice of the layer to get trigger point information from determines the view expressed in a QOS
PARAMETERS. Generally, choosing lower-level events such as Layer 3 gives a more network-centric view, while
events on higher levels tend to produce views more user-related. From this, the following guidelines result:
• Within the same QoS PARAMETERS, the source layer for events used as trigger points should be the same.
• In benchmarking, all networks under test should be tested using the same type of UE, and QOS
PARAMETERS for all networks under test should use trigger points from the same layer.
• When changing the source layer for a given trigger point, changes in QOS PARAMETERS should be
expected, and respective calibration measurements should be taken to assess influence on QOS
PARAMETERS both quantitatively and qualitatively.
ETSI
11 ETSI TS 102 250-4 V2.3.1 (2019-11)
5 General requirements
5.1 General requirement for data logging
The measurement system shall provide means to collect and store reliably all relevant measurement data. Additionally
all configuration parameters have to be stored to be able to reproduce the test.
The system has to provide means to detect and sort out invalid measurement cycles to avoid misrepresenting statistics.
The evaluation of the measured values is typically done during post processing. Measurement cycles which are removed
from the measured data have to be reported.
5.2 Overview
The typical components of the Mobile QoS Test-equipment (MQT) will be as illustrated in Figure 2.

(1) Test-UE: User equipment emulating the typical user device (1…n).
(2) Antenna: Test-UE antenna or external antenna.
(3) Controller: Controls all the active parts in MQT.
(4) Processor: Controlling the Test-UE and Pre-processing measurement data.
Optionally the tasks of the processor can be moved into controller.
(5) Storage: Storage of measurement data and programs.
(6) MMI:  Man Machine Interface for control and configuration of a MQT-LC or for diagnostics in
case of a MQT-RC.
(7) PS:  Positioning System (GPS or Indoor Navigation).
(8) PWR:  Power Supply.
Figure 2: Typical components of the mobile QoS test-equipment (MQT)
5.3 Required information for logging
5.3.1 Information on Measurement Setup
5.3.1.1 General Information
Measurement setup needs to be reproduced if necessary. This requires that the configuration of the measurement
equipment, with which the measurement has been done needs to be recorded.
ETSI
12 ETSI TS 102 250-4 V2.3.1 (2019-11)
NOTE: However, the measurement results not only depend on the configuration of the measurement equipment,
also other circumstances like day of the week and time of day influence the measurement results
considerably.
The following list is considered to be a required minimum.
Information automatically collected:
• Versions of measurement equipment:
- Hardware Version.
- Software Version of Measurement Application.
- Operating System Version (Operation System and Service Pack).
• Date, time of day (UTC time + time zone).
Manually entered information:
• User.
• Comment.
• Any other information on test case control parameters, which is required to re-run the test case under the same
conditions, but cannot be collected automatically.
5.3.1.2 Information on User Equipment in use
For the setup of the User Equipment in use, the following list of parameters is required as a minimum:
Information automatically collected:
• Type of User Equipment.
• Firmware version.
• Unique UE ID (e.g. IMEI, Serial Number, MAC, etc.).
• IMSI (configuration of SIM card can have a significant influence on the measurement result).
• Software Version of driver for operating system, if used.
• All settings of the control software.
Manually entered information:
• Antenna:
- Type.
- Extra attenuation.
- Total Cable loss (Cables, RF combiners, etc.).
5.3.1.3 Information on Store-And-Forward Setups
The following information has to be logged:
• Number of Service Centre.
• Access Parameters.
• Transmitted Message, Video and/or Audio.
• Timeout Values.
ETSI
13 ETSI TS 102 250-4 V2.3.1 (2019-11)
5.3.1.4 Information on Data Test Setups
For Data Tests the following list represents the minimum required parameters.
Information automatically collected:
• Any stack parameter configuration or difference to the standard of the used operating system, e.g. information
about TCP stack parameter changes.
• Servers.
• All settings of the control software concerning the Data Test Setup, e.g. FTP Settings.
5.3.2 Measurement Data
Each measured item has to be stored with the corresponding timestamp.
Additional to the trigger points as specified in ETSI TS 102 250-2 [3], the measurement equipment shall collect the
following list of data:
• Network ID (MCC, MNC, CI, LAC), respective data items with a rate sufficient to track the User Equipments
behaviour.
5.3.3 Status Information
The system has to record information about the status and progress of the current measurement.
5.3.4 Trigger Points
The system has to record all necessary trigger points. See ETSI TS 102 250-2 [3].
5.3.5 QoS Parameters
If possible, QoS Parameters shall be calculated during the measurement and be shown on the MMI.
For test cases on distributed systems the calculation process for QoS Parameters has to be done in a post process.
5.4 Test-UE
Basic requirements on the Test-UE:
• Compliant to corresponding specifications (e.g. 3GPP, TETRA).
• For usage of the AT interface for trigger point measurements, the UE has to be conform to the corresponding
specifications, e.g. ETSI TS 127 007 [10] and ETSI TS 127 005 [11] for 3GPP, and ETSI EN 300 392-5 [12]
for TETRA.
• Remote controllable to initiate the QoS tests with required parameter settings.
• Test UE delivers the necessary data, which is required for the QoS test.
• For benchmark tests only User Equipments with the same capabilities can be used. (e.g. max. number of TS
allowed, best type of speech codec, etc.).
• Depending on the test case additional requirements may be relevant.
5.5 Antennas
Depending on the test case, the Test-UE's own antenna or an external antenna has to be used.
ETSI
14 ETSI TS 102 250-4 V2.3.1 (2019-11)
Where applicable, the antennas have to be arranged in a well-defined fixed way with a minimum distance to each other
reducing RF-influence on an acceptable level in an equal radio environment. The coupling loss between 2 UEs should
be minimum 40,5 dB (as specified in clause 2 of ETSI TS 100 910 [1]).
NOTE 1: Certain types of system integration will not allow satisfying these requirements, due to the limitation of
space (e.g. backpack system). However, the antennas should be mounted on pre-determined points of the
system which guarantee a minimum RF-influence.
External antennas are typically used for measurements in vehicles (car, train, ship). Two RF scenarios can be defined
for vehicles:
1) User with car kit and external antenna:
- Car mounted antenna with no extra attenuation has to be used.
2) User without car kit, using the User Equipment only (In-car use):
- Internal antenna of User Equipment can be used.
NOTE 2: Simulation without body loss.
or
- External antenna connected with an overall attenuation of approximately 13 dB (cable loss plus extra
attenuation) should be used.
NOTE 3: More information about antenna attenuation is to be found in ETSI TR 102 581 [i.1].
5.6 Controller/processor/storage
The performance of the unit should be high enough and have no measurable impact on the correctness of the data
collection. If the unit runs out of any resources it shall inform the user on the MMI.
5.7 Man Machine Interface (MMI)
5.7.1 Local Controlled Systems
The MMI has to allow full operation of the system by the operator. The main functionalities can be monitored and the
operator is alerted in case of main failures. Some basic failure diagnostic is possible.
5.7.2 Remote Controlled Systems
An MMI can be connected to perform basic tests and some failure diagnostics. Unattended systems should provide
means to generate alarms upon operational faults in the system.
5.8 Time sources
The clocks on the measurement systems have to be synchronized periodically. The required accuracy of the timestamps
of the measurement item is:
• Relative: 20 ms.
• Absolute: 250 ms.
5.9 Environmental conditions
The measurement system has to meet at least the minimal environmental conditions requirements defined in clauses 6.4
and 7.5.
ETSI
15 ETSI TS 102 250-4 V2.3.1 (2019-11)
6 Fixed QoS Test-equipment (FQT)
6.1 General
Depending on the test-scenarios defined in clause 4 of the present document, there will be different requirements for the
FQT and MQT.
6.2 Controller
The performance of the unit should be high enough and have no measurable impact on the correctness of the data
collection.
6.3 Time-sources
See clause 5.8.
6.4 Environmental conditions
The FQT has to meet the following environmental conditions:
• Temperature: 5 °C to 40 °C.
• Humidity: maximum 90 %.
6.5 FQT for Telephony Measurements
6.5.1 Common Aspects
For the user-to-user services different FQTs can be used. Also the connection point to the network can vary between an
ISDN or PSTN line and a direct link at the MSC/RNC.
However, the used type of server and the connection have to be stored in the final measurement result.
The topology of the distributed system (MQT and FQT) results in the necessity of merging the measurement results
made on the FQT and on the MQT. The result will be merged on the time base.
A unique identifier has to be included in measurement files to be able to identify what files belong to the same
measurements. This identifier has to be generated automatically by the measurement system.
6.5.2 Telephony Speech
Calculating Telephony QoS parameters including speech quality requires a counterpart on the fixed network. This is
typically a PC which is connected to the PSTN. An application on the PC answers the incoming calls from the MQT or
generates calls to the MQT.
A FQT application for Telephony Speech Service handles the CS connections of the speech calls, like an answering
machine. It controls 1 to n MSN(s). Each MSN has its own profile for incoming or outgoing calls. The FQT application
has to have the following capabilities:
• Auto answering of incoming calls.
• Speech Quality Assessment of the incoming speech calls (uplink).
• Providing speech samples for the downlink.
• Generating MT calls.
ETSI
16 ETSI TS 102 250-4 V2.3.1 (2019-11)
6.5.3 Telephony Video
For telephony video different types of connection points are available:
• ISDN line/direct connection at MSC/RNC.
• UMTS User Equipment with video telephony application.
• UMTS User Equipment used as modem with a video telephony stack on the PC.
A FQT application for Telephony Video handles the CS connections of the video calls. It controls 1 to n connection
points. Each connection point has its own profile for incoming calls. The FQT application has to have the following
capabilities:
• Auto answering of incoming video calls.
• Providing speech/video samples for the downlink.
6.6 FQT for store-and-forward services
6.6.1 Overview and Common Aspects
Store and forward services typically transports information between two User Equipments. Therefore the typical
difference between MQT and FQT does not apply for store-and-forward services. The quality of store-and-forward
services depend on one side on the RF coverage and on the other side, much more than other services, on the network
internal infrastructure like the SMSC.
The measurement system shall be able to measure all specified QoS Parameters using User Equipments only.
A general problem is that the A-party does not get a confirmation if the message was received successfully to the
B-party. Also the network internal infrastructure can change the order of messages. The B-party of the measurement
system has to be able to handle this effect.
6.7 FQT for Data Measurements
The FQT is the measurement server as the physical machine plus the service application.
It shall serve the service requests from the MQT in order to achieve the QoS parameter defined ETSI TS 102 250-2 [3].
The server has to support the user profiles defined in ETSI TS 102 250-5 [5].
It has to be ensured, that the highest possible throughput on the measurement server is higher th
...