ETSI TS 102 250-7 V1.1.1 (2009-10)

Speech and multimedia Transmission Quality (STQ); QoS aspects for popular services in GSM and 3G networks; Part 7: Network based Quality of Service measurements

DTS/STQ-00127m

General Information

• Status: Published
• Publication Date: 13-Oct-2009
• Technical Committee: STQ MOBILE - STQ Mobile
• Current Stage: 12 - Completion
• Due Date: 21-Oct-2009
• Completion Date: 14-Oct-2009

Standards Content (Sample)

ETSI TS 102 250-7 V1.1.1 (2009-10)
Technical Specification


Speech and multimedia Transmission Quality (STQ);
QoS aspects for popular services in GSM and 3G networks;
Part 7: Network based Quality of Service measurements

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2 ETSI TS 102 250-7 V1.1.1 (2009-10)



Reference
DTS/STQ-00127m
Keywords
3G, GSM, network, QoS, service, speech
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© European Telecommunications Standards Institute 2009.
All rights reserved.

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ETSI

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3 ETSI TS 102 250-7 V1.1.1 (2009-10)
Contents
Intellectual Property Rights . 4
Foreword . 4
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 7
4 Network Measurement Basics . 8
4.1 Point of Control and Observation (PCO) . 8
4.2 Point of Recording (POR) . 8
5 Measuring QoS Parameters in the Network . 8
5.1 General Overview. 8
5.2 Service Accessibility QoS Parameters . 9
5.3 Service Retainability QoS Parameters . 9
5.4 Service Integrity QoS Parameters . 9
5.4.1 Media Quality Parameters . 10
5.4.2 Response Time Parameters . 10
5.4.3 Data Rate Parameters . 10
6 Comparing Network and End-point Test Measurements . 10
Annex A (informative): The concept of QoE reporting . 12
Annex B (informative): Examples of Network Based QoS Measurements . 13
B.1 Accessability and Retainability Parameters . 13
B.2 Media Quality Parameters . 14
B.3 Response Time Parameters . 14
B.4 Data Rate Parameters . 15
Annex C (informative): 3GPP SA5 "UE Management" . 17
Annex D (informative): Bibliography . 18
History . 19

ETSI

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4 ETSI TS 102 250-7 V1.1.1 (2009-10)
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://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, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Speech and multimedia
Transmission Quality (STQ).
The present document is part 7 of a multi-part deliverable covering the QoS aspects for popular services in GSM and
3G networks, as identified below:
Part 1: "Identification of Quality of Service criteria";
Part 2: "Definition of Quality of Service parameters and their computation";
Part 3: "Typical procedures for Quality of Service measurement equipment";
Part 4: "Requirements for Quality of Service measurement equipment";
Part 5: "Definition of typical measurement profiles";
Part 6: "Post processing and statistical methods";
Part 7: "Network based Quality of Service measurements".
Part 1 identifies QoS aspects for popular services in GSM and 3G networks. For each service chosen QoS indicators are
listed. They are considered to be suitable for the quantitative characterization of the dominant technical QoS aspects as
experienced from the end-customer perspective.
Part 2 defines QoS parameters and their computation for popular services in GSM and 3G networks. The technical QoS
indicators, listed in part 1, are the basis for the parameter set chosen. The parameter definition is split into three parts:
the abstract definition which contains a generic description of the parameter, the abstract equation and the respective
trigger points. Only measurement methods not dependent on any infrastructure provided are described in the present
document. The harmonized definitions given in the present document are considered as the prerequisites for comparison
of QoS measurements and measurement results.
Part 3 describes typical procedures used for QoS measurements over GSM and 3G networks, along with settings and
parameters for such measurements.
Part 4 defines the minimum requirements of QoS measurement equipment for GSM and 3G networks in the way that
the values and trigger points needed to compute the QoS parameter as defined in part 2 can be measured following the
procedures defined in part 3. Test equipment fulfilling the specified minimum requirements will allow to perform the
proposed measurements in a reliable and reproducible way.
Part 5 specifies test profiles which are required to enable benchmarking of different GSM or 3G networks both within
and outside national boundaries. These profiles are necessary for comparing "like-for-like" performance in case that a
specific set of tests is carried out by different customers.
ETSI

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5 ETSI TS 102 250-7 V1.1.1 (2009-10)
Part 6 describes procedures to be used for statistical calculations in the field of QoS measurement of GSM and 3G
networks using probing systems.
Part 7 describes how Quality of Service measurements should be done inside the network without direct access to the
end point terminal.
Introduction
Measurements of service performance can be done either with an end-point test measurement tool, ether stationary or
mobile drive test, or inside the network itself. The measurements should always be done from an end-user perspective,
independent of the measurement point. Obviously a measurement done inside the network might not give exactly the
same result as a measurement done in the end-point with a test tool.
However, also the network measurement can give valuable information about service performance as the end-user
perceives it. It is also possible to take more samples of the service performance with a network based measurement than
with an end-point test tool. The service performance measurements discussed presented in the present document shall
all be based on standardized protocols and interfaces.
The quality of service parameters in TS 102 250-2 [1] are initially specified for an end-point test tool measurement
scenario. However, the parameters can be reused for network based measurements with some limitations and minor
changes.
ETSI

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6 ETSI TS 102 250-7 V1.1.1 (2009-10)
1 Scope
The present document specifies how the quality of service parameters, listed in TS 102 250-2 [1], should be used for
measurements done inside a network, in contrary to measurements done in the end-point with a test tool. A test tool can
be either stationary or a drive test tool. The measurements of the QoS parameters according to the present document
should be done using standardized interfaces and protocols. This is done to ensure that all measurements in a
multi-vendor network can be compared.
2 References
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location 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 indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI TS 102 250-2: "Speech and multimedia Transmission Quality (STQ); QoS aspects for
popular services in GSM and 3G networks; Part 2: Definition of Quality of Service parameters and
their computation".
[2] Void.
[3] ETSI TS 126 234: "Universal Mobile Telecommunications System (UMTS); LTE; Transparent
end-to-end Packet-switched Streaming Service (PSS); Protocols and codecs (3GPP TS 26.234)".
[4] ETSI TS 126 346: "Universal Mobile Telecommunications System (UMTS); LTE; Multimedia
Broadcast/Multicast Service (MBMS); Protocols and codecs (3GPP TS 26.346)".
[5] ETSI TS 126 114: "Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia
Subsystem (IMS); Multimedia telephony; Media handling and interaction (3GPP TS 26.114)".
[6] ITU-T Recommendation P.564: "Conformance testing for voice over IP transmission quality
assessment models".
[7] ITU-T Recommendation P.862.1: "Mapping function for transforming P.862 raw result scores to
MOS-LQO".
[8] Void.
ETSI

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7 ETSI TS 102 250-7 V1.1.1 (2009-10)
[9] ETSI TS 124 008: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Mobile radio interface Layer 3 specification; Core
network protocols; Stage 3 (3GPP TS 24.008 Release 8)".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
Not applicable.
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
drive test tool: end-point test tool which is designed to be moved around, i.e. by walking or driving a car
end-point test tool: typically especially designed mobile which uses active test calls to collect measurements
stationary tool: end-point test tool which is installed in a fixed location
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
rd
3G 3 Generation
3GPP Third Generation Partnership Project
ACK Acknowledgement
FTP File Transfer Protocol
Gn Interface between GSN nodes
GPRS General Packet Radio Service
GSM Global System for Mobile communications
GSN GPRS Support Node
Iub Interface between RNC and Node B
MO Mobile-Originated
MT Mobile-Terminated
PCO Point of Control and Observation
PoC Push to talk over Cellular
POR Point of Recording
QoE Quality of Experience
QoS Quality of Service
RNC Radio Network Controller
RRC Radio Resource Control
SGSN Serving GPRS Support Node
TCP Transmission Control Protocol
UE User Equipment
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8 ETSI TS 102 250-7 V1.1.1 (2009-10)
4 Network Measurement Basics
4.1 Point of Control and Observation (PCO)
The Point of Control and Observation (from now on called "point of observation" or PCO) is the location where the
measurement is actually performed. The location can be either inside the network or in the end-point. The
measurements should be done using standardized interfaces and protocols.
Possible points of observation for QoS parameters covered in the present document are:
• Inside nodes in the network (RNC, base station, switch, etc.)
• Observations in the terminal:
- End-point test tool; or
- Measurements that are reported back from the terminal to the network
PCO in network node
or at network node
POR in a network node and
interface
PCO in mobile data is reported from a PCO in
(can be multiple PCO) a terminal
Higher
layer
Network node
Network node
Node B
RRC
RLC/MAC
L1

Figure 1: Points of Observation, Points of Recording and Measurement Reporting
4.2 Point of Recording (POR)
The point of recording (POR) is where the QoS parameters are recorded. The POR can be the same as the PCO or
another point inside the terminal or the network. If the PCO and the POR are not the same, the measurement data must
be reported from the PCO to the POR. Examples of such reporting are described in annex A.
5 Measuring QoS Parameters in the Network
5.1 General Overview
The quality of service measurements should be done as much as possible in the same way inside the network as they are
done in the end-point with a test tool. Many types of measurements can be done with the same trigger points (for
instance, the reception of a certain protocol message) independent of the point of measurement, but the measurement
result might differ slightly depending on where in the call or transmission chain the PCO is located.
ETSI

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9 ETSI TS 102 250-7 V1.1.1
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