ETSI TS 102 250-3 V2.2.1 (2011-04)

Speech and Multimedia Transmission and Quality (STQ); QoS aspects for popular services in mobile networks; Part 3: Typical procedures for Quality of Service measurement equipment

RTS/STQ-00178m

General Information

• Status: Published
• Publication Date: 28-Apr-2011
• Technical Committee: STQ MOBILE - STQ Mobile
• Current Stage: 12 - Completion
• Due Date: 29-Apr-2011
• Completion Date: 29-Apr-2011

Standards Content (Sample)

Technical Specification
Speech and multimedia Transmission Quality (STQ);
QoS aspects for popular services in mobile networks;
Part 3: Typical procedures for Quality of Service
measurement equipment
2 ETSI TS 102 250-3 V2.2.1 (2011-04)

Reference
RTS/STQ-00178m
Keywords
3G, GSM, network, QoS, service, speech
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3 ETSI TS 102 250-3 V2.2.1 (2011-04)
Contents
Intellectual Property Rights . 6
Foreword . 6
Introduction . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 8
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 9
4 Aim of measurement . 10
5 Classification of services . 10
5.1 Classification guidelines . 10
5.2 General structure of service descriptions . 11
6 General aspects for all types of services. 11
6.1 Set-up and control . 11
6.2 Phase and result classification . 11
6.2.1 Phase and result classification for direct services . 12
6.2.2 Phase and result classification for store-and-forward services . 12
7 Telephony measurements . 13
7.1 General aspects . 13
7.1.1 Transaction definition and transaction types. 13
7.1.2 Parameter overview . 13
7.1.3 Additional transaction result definitions . 14
7.1.4 Content quality . 14
7.1.5 Verification of usable two-way connection . 15
7.2 Speech telephony . 15
7.2.1 Transaction definition and transaction types for speech telephony . 15
7.2.2 Parameter overview for speech telephony . 15
7.2.3 Additional transaction results for speech telephony . 15
7.2.4 Content quality for speech telephony. 15
7.2.5 Verification of usable two-way connection for speech telephony . 15
7.3 Video telephony . 15
7.3.1 Transaction definition and transaction types for video telephony . 15
7.3.2 Parameter overview for video telephony . 16
7.3.3 Additional transaction result definitions for video telephony . 16
7.3.4 Content quality for video telephony . 16
7.3.5 Verification of usable two-way connection for video telephony . 16
7.3.6 Call setup considerations for MTSI calls . 16
7.4 Group Call . 17
7.4.1 Transaction definition and transaction types for group calls . 17
7.4.2 Parameter overview for group calls . 17
7.4.3 Additional transaction result definitions for group calls . 17
7.4.4 Content quality for group calls . 18
7.4.5 Verification of usable connection for group calls . 18
8 Store-and-forward services measurement . 18
8.1 General aspects . 18
8.1.1 Transaction phase and parameter overview . 18
8.1.2 Additional transaction result definitions . 18
8.1.3 Content quality for Store-and-Forward Services . 19
8.2 SMS measurements . 19
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4 ETSI TS 102 250-3 V2.2.1 (2011-04)
8.2.1 General aspects of SMS measurements . 19
8.2.2 Transaction definitions and transaction types for SMS . 19
8.2.3 Testing mode for SMS-MT . 20
8.2.4 Testing mode for SMS-MO . 20
8.2.5 Transaction phase and parameter overview for SMS. 20
8.2.6 Possible transaction results for SMS . 20
8.2.7 Content quality for SMS . 21
8.3 MMS . 21
8.3.1 General aspects of MMS measurements . 21
8.3.2 Transaction definitions and transaction types for MMS . 21
8.3.3 Transaction phase and parameter overview for MMS . 22
8.3.4 Additional transaction result definitions for MMS . 22
8.3.5 Content quality for MMS . 23
8.4 E-Mail . 23
8.4.1 Transaction definitions for E-Mail . 23
8.4.1.1 Protocols . 23
8.4.1.2 Reference content . 23
8.4.1.3 Content integrity . 24
8.4.1.4 Push functionality . 24
8.4.1.5 Header only download . 24
8.4.1.6 Timeouts . 24
8.4.1.7 General requirements and limitations. 24
8.4.2 Transaction scenarios for e-mail . 24
8.4.2.1 Upload scenario . 25
8.4.2.2 Download scenario . 25
8.4.2.3 End-to-end scenario with IMAP4 . 26
8.5 SDS . 27
9 Data measurements. 27
9.1 Common aspects . 27
9.1.1 Transaction definition and transaction types for data measurements . 27
9.1.2 Server types . 27
9.1.3 Test data content . 28
9.1.4 Transaction phase and parameter overview . 28
9.1.4.1 General . 28
9.1.4.2 Packet-switched access . 29
9.1.4.3 Circuit-switched access . 29
9.1.5 Possible transaction results . 29
9.1.6 Content quality . 30
9.1.7 Content integrity . 30
9.2 FTP . 30
9.2.1 Transaction definition and transaction types for FTP . 30
9.2.2 Transaction phase and parameter overview for FTP . 30
9.2.3 Possible transaction results for FTP . 30
9.2.4 Content quality for FTP . 30
9.2.5 Content integrity for FTP . 30
9.3 HTTP . 30
9.3.1 Transaction definition and transaction types for HTTP . 30
9.3.2 Transaction phase and parameter overview for HTTP. 31
9.3.3 Possible transaction results for HTTP . 31
9.3.4 Content quality for HTTP . 31
9.3.5 Content integrity for HTTP . 31
9.4 E-mail . 31
9.5 WAP . 31
9.5.1 Transaction definition and transaction types for WAP . 31
9.5.2 Transaction phase and parameter overview for WAP . 32
9.5.3 Possible transaction results for WAP . 33
9.5.4 Content quality for WAP . 33
9.5.5 Content integrity for WAP . 34
9.6 Streaming Video . 34
9.6.1 Transaction definition and transaction types for streaming video . 34
9.6.2 Transaction phase and parameter overview for streaming video . 34
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5 ETSI TS 102 250-3 V2.2.1 (2011-04)
9.6.3 Possible transaction results for Streaming Video. 34
9.6.4 Content quality for Streaming Video . 34
9.6.5 Content integrity for Streaming video . 34
9.7 Media Download . 35
9.7.1 Transaction definition and types for Media Download . 35
9.7.1.1 OMA network elements . 35
9.7.1.2 OMA download use cases . 36
9.7.1.2.1 Combined OMA download use case . 36
9.7.1.2.2 Separate OMA download use case . 37
9.7.1.3 DRM use cases . 38
9.7.1.3.1 Combined delivery DRM use case . 38
9.7.1.3.2 Separate delivery DRM use case . 38
9.7.2 Transaction phase and parameter overview for Media Download . 39
9.7.2.1 Overview of basic parameters for Media Download . 39
9.7.2.2 Media Download subphases . 40
9.7.2.3 Combined OMA download and combined delivery DRM use case. 41
9.7.2.4 Separate OMA download and combined delivery DRM use case . 41
9.7.2.5 Combined OMA download and separate delivery DRM use case . 41
9.7.2.6 Separate OMA download and separate delivery DRM use case . 42
9.7.2.7 Additional information about parameters for Media Download . 42
9.7.2.8 Recommended Testing Method for Media Download . 42
9.7.3 Possible transaction results for Media Download . 42
9.7.4 Content quality for Media Download . 42
9.7.5 Content integrity for Media Download . 42
History . 44

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6 ETSI TS 102 250-3 V2.2.1 (2011-04)
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 3 of a multi-part deliverable covering the QoS aspects for popular services in mobile
networks, as identified below:
Part 1: "Assessment of Quality of Service";
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 builds an umbrella document for this multi-part deliverable. It summarizes the basics of Quality of Service,
always seen from the user's perspective. Differences to Quality of Experience (QoE) are also discussed. In extension to
generic definitions, specific definitions for this multi-part deliverable are stated here. Furthermore, it gives guidance to
assure that QoS assessments can be conducted in a meaningful way and proposes an according process.
Part 2 defines QoS parameters and their computation for popular services in mobile networks. The parameter definition
is split into several parts. It contains an abstract definition which gives a generic description of the parameter, an
abstract equation and the corresponding user and technical trigger points.
The harmonized definitions given in part 2 are considered as prerequisites for the comparison of QoS measurements and
measurement results.
The present document describes the measurement procedures needed to perform the measurements of QoS parameters
in line with the definitions given in part 2, applying the test profiles defined in part 5.
Part 4 defines the minimum requirements of QoS measurement equipment for mobile 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 performing the
proposed measurements in a reliable and reproducible way.
Part 5 specifies typical measurement profiles which are required to enable benchmarking of different mobile networks
both within and outside national boundaries.
Part 6 describes procedures to be used for statistical calculations in the field of QoS measurement of mobile 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.
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7 ETSI TS 102 250-3 V2.2.1 (2011-04)

Introduction
The present document describes the measurement procedures needed to perform the measurements of QoS parameters
in line with the definitions given in part 2 [i.5], applying the test profiles defined in part 5 [3].
The aim of standardization of QoS measurements is to ensure that measurements done at different times and with
different equipment produce comparable results. To reach this goal, not only computation rules have to be standardized.
Since the result of measurements will depend on the way these measurements are performed, well-defined procedure
definitions are also required to ensure comparable data.
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8 ETSI TS 102 250-3 V2.2.1 (2011-04)
1 Scope
The present document describes typical procedures used for QoS measurements on mobile communication networks,
along with settings and parameters for such measurements.
Where possible, existing ITU-T or ETSI definitions are referenced. In some cases ITU-T or ETSI definitions do not
exist or are considered too generic, then a more service and mobile network specific definition is chosen.
2 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
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 necessary for the application of the present document.
[1] ITU-T Recommendation P.56: "Objective measurement of active speech level".
[2] ETSI TS 102 250-1: "Speech Processing, Transmission and Quality Aspects (STQ); QoS aspects
for popular services in GSM and 3G networks; Part 1: Identification of Quality of Service criteria".
[3] ETSI TS 102 250-5: "Speech and multimedia Transmission Quality Aspects (STQ); QoS aspects
for popular services in GSM and 3G networks; Part 5: Definition of typical measurement profiles".
2.2 Informative references
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] IETF RFC 3501: "Internet message access protocol - version 4rev1".
[i.2] IETF RFC 2177: "IMAP4 IDLE command".
[i.3] IETF RFC 2821: "Simple Mail Transfer Protocol".
[i.4] IETF RFC 1939: "Post Office Protocol - Version 3".
[i.5] 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".
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9 ETSI TS 102 250-3 V2.2.1 (2011-04)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
A-party: in direct transactions, the party initiating the transaction (calling party)
NOTE: In store-and-forward transactions, the party sending content.
B-party: in direct transactions, the termination or counterpart of a transaction
NOTE: In store-and-forward transactions, the party receiving content.
content: entirety of information transferred within a transaction, seen from the user's perspective
NOTE: In case of services requiring entrance procedures (e.g. server login with FTP), information flow to
achieve the state of being able to transfer actual user data is not counted as content.
EXAMPLE: Single text message in SMS service; single multimedia message consisting of video, audio, and
text components in MMS service.
direct transaction: real-time transaction between two entities
maximum expected delivery time: for store-and-forward services, this defines the time span within which a message
shall be received by the B-party to rate the transaction successful from the user's perspective
service family: group of services having main characteristics in common
EXAMPLE: Speech and Video Telephony, as well as SMS and MMS, are assumed to form a service family.
store-and forward transaction: transaction where information is sent from one party A to another party B using an
entity C to store information sent from A and attempting to deliver it to B
transaction: single, complete, typical usage of a particular service
NOTE 1: At the beginning of each clause describing a particular service or family of services, the typical
transaction for this particular service is described.
NOTE 2: Each type of transaction has parameters. The sum of all parameters describes the transaction completely.
A parameter set is assumed to be complete if, under constant outer conditions, all transactions using this
parameter set provide the same result.
transaction result: set (list) of possible outcomes for a particular transaction
NOTE: Services belonging to the same service family share the same set of transaction results.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AOV Angles Of View
APN Access Point Name
CS Circuit Switched
CSD Circuit Switched Data
DNS Domain Name Server
DRM Digital Rights Management
FTP File Transfer Protocol
GGSN Gateway GPRS Support Node
GPRS General Packet Radio Service
GW Gateway
HTTP Hyper Text Transfer Protocol
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10 ETSI TS 102 250-3 V2.2.1 (2011-04)
IP Internet Protocol
MEDT Maximum Expected Delivery Time
MMS Multimedia Messaging Service
MO Mobile Originated
MOF Mobile Originated to Fixed
MOM Mobile Originated to Mobile
MS Mobile Station
MT Mobile Terminated
MTM Mobile Terminated, originator is also a Mobile unit
MTU Maximum Transmission Unit
NAT Network Address Translation
PC Personal Computer
PDP Packet Data Protocol
PDU Packet Data Unit
POP3 Post Office Protocol Version 3
PS Packet Switched
PSD Packet Switched Data
QoS Quality of Service
RTP Realtime Transport Protocol
S&F Store and Forward
SDS Short Data Service
SMS Short Message Service
SMSC Short Message Service Centre
TCP/IP Transmission Control Protocol/Internet Protocol
UDP User Datagram Protocol
UE User Equipment
URI Uniform Resource Identifier
URL Uniform Resource Locator
WAP Wireless Access Protocol
WAP Wireless Application Protocol
XHTML eXtensible Hyper Text Markup Language
4 Aim of measurement
The aim of measurements described in the present document is to assess the network under test for its Quality of
Service (QoS) parameters as defined in TS 102 250-2 [i.5]. This is, to determine the network quality for the respective
transactions from the user's view.
5 Classification of services
5.1 Classification guidelines
For the purpose of the present document, services are classified using what is considered to be their dominating
property. The first distinction is made between direct and store-and-forward services:
• Direct-transaction services are services where there is - in the user's perception - a direct end-to-end
connection.
• Store-and-forward services are services where content is stored in the network and delivered to the recipient at
a later point in time.
As a technically usable differentiation, a service is considered to be direct if it is possible to decide on end-to-end
content transfer success from the initiating party (A-party) of the connection within the scope of the transaction itself.
NOTE: e-Mail is a special case since it has both aspects of direct and of store and forward services. In the present
document, it is, as in part 2 [i.5] of this multi-part deliverable, treated in the clause on store and forward
services.
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11 ETSI TS 102 250-3 V2.2.1 (2011-04)
5.2 General structure of service descriptions
In the following, each service family description will contain the following structural elements:
• A general part defining:
- the basic transaction definition and if applicable, transaction types;
- a description of the transaction phase combined with a table of parameters governing transaction
behaviour in this phase;
- a description of all possible outcomes of a single transaction;
- a description of content quality measurement definitions (if applicable).
• In case there are service-dependent differences, a service-dependent part having the same structure as above.
6 General aspects for all types of services
6.1 Set-up and control
Measurements should be conducted in a way that user behaviour is realistically modelled. Parameters and settings
which have substantial influence on results need to be under control of the measurement equipment.
The testcase design (configuration and user profile) - to the degree necessary to fully reproduce the test - shall be part of
the measurement documentation.
It is assumed that for all types of services under test, a testcase consists of a number of single identical transactions. The
measurement equipment and control must ensure that the starting conditions are the same for each transaction. This
includes, among other things, that pause times are sufficiently long that the equipment is in a stable (idle) state again.
The parameter "guard time" sets a minimum value for the pause between transactions.
It is assumed that all QoS-relevant transaction parameters are recorded for proper post-processing and are kept constant
during measurements. If a measurement contains more than one parameter set, evaluation shall be made for each
parameter set separately.
6.2 Phase and result classification
In order to ensure common wording, the following clause defines terms and definitions for service measurements.
It is assumed that each transaction can be described at least by one seamless sequence of phases. There may exist
several Angles Of View (AOV), each leading to a different phase description.
EXAMPLE: Internet services (as described by its QoS parameters defined in TS 102 250-2 [i.5] model A
and B). AOV differ here by different assumptions on start of service usage. Each AOV, however,
is a consistent description by seamlessly connected phases.
Phases may be further described having sub-phases.
Pauses between transactions are not explicitly mentioned in this picture, but are relevant with respect to parameter
reporting. Typically, there is a minimum pause (guard time) ensuring that the system under test is in a stable starting
condition for the next test. Values are technology-dependent.
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12 ETSI TS 102 250-3 V2.2.1 (2011-04)
6.2.1 Phase and result classification for direct services
A direct transaction consists of two top-level phases: service access and service usage.
Table 1: General phase definitions for direct services
Phase Sub-phase Definition
Service access All steps leading to the technical ability to perform actual
user-perspective content transport between A- and
B-party. Service access may consist of different sub-
phases, e.g. Network access, IP service access and
Internet access. The availability of these sub-phases
actually depends on the particular service.
Network access Basic access to the network under test. Successful
network access is assumed when the UE is able to do as
much basic communication with the network as is
necessary to initiate the next phase in the service access
procedure.
IP service access Basic access to the generic packet-data transfer
capabilities the particular service is based upon.
Internet access Basic access to those internet services the service is
meant to provide.
Service usage Content transfer between A- and B-party.

A direct transaction may have one of the following overall results.
Table 2: General result classification for direct services
Result Definition
Failed Phase of service usage not reached.
Successful or failed service access may be broken down into diagnostic
sub-categories. The general name-forming rule is: result.
Example: Network access failed
Completed Data-transfer transactions: All content intended to be transferred has been
successfully transferred.
Conversational transactions: The intended transaction duration has been reached.
Dropped/Cut-off Service usage was ended before completion.
NOTE: If a transaction being in the service usage phase is stopped due to some timeout or due to other criteria
by the measurement system, e.g. to enhance test rate, this shall be treated as a dropped transaction.
This behaviour has to be recorded by the measurement system.

6.2.2 Phase and result classification for store-and-forward services
A store-and-forward transaction consists of two top-level phases: content sending and content delivery.
Table 3: General phase definitions for store-and-forward services
Phase Sub-phase Definition
Content sending All steps required to transfer the content to the network,
up to the point where the network is able to start delivery.
This phase is completed when there is nothing more the
A-party can/needs to do to transfer content to the
B-party. It is assumed that the A-party gets information
sufficient to judge if sending has been successful or not.
Content delivery All steps to transfer the content from the network to the
B-party. Delivery may consist of two main sub-phases:
notification and retrieval.
Notification (optional) Information to the B-party that content is ready for
transfer.
Retrieval/Delivery Transport of content from network to B-party.

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13 ETSI TS 102 250-3 V2.2.1 (2011-04)
A Store-and-forward transaction may have one of the following overall results.
Table 4: General result classification for store-and-forward services
Result Sub-category Definition
Completed Content was successfully transferred from A- to B-party.
Failed Content was not successfully transferred from A- to B-party.
Depending on particular services and available information, there may be a number
of possible sub-categories for this result.
Undelivered Content was successfully sent to the network, but was never (or: not within a
desired period of time, see note) delivered or retrieved.
Send failed Content was not successfully delivered to the network.
Lost Content was successfully sent to the network, but notification was never received by
the B-party. Diagnostic sub-category in case notification can/shall be technically
identified within the delivery process.
Timeout The transaction was completed, but the content delivery time was above a given
threshold.
7 Telephony measurements
This clause deals with telephony services. In general, the term "content" will be used throughout this clause for the
information flow exchanged between participating users during a call. Depending on the type of service, content can be
audio or audio and video.
7.1 General aspects
7.1.1 Transaction definition and transaction types
The basic transaction for telephony testing is equivalent to a single call to a counterpart extension.
7.1.2 Parameter overview
Table 5: Parameter overview for telephony measurements
Phase Parameters
Service Access Call counterpart. This includes the type of equipment (dedicated unit, unique identifier
(e.g. called party number), automatic answer with taped message, etc.).
Call type.
Time-out value
Service Usage Call duration.
Content flow direction: This is an inner parameter for a transaction. Basically, all
combinations of uplink/downlink dynamics are possible:
- Uplink only;
- Downlink only;
- Conversational (alternating uplink and downlink). This is the recommended
standard testing mode. Other testing modes are considered to be used only for
special purposes;
- "Duplex" (uplink and downlink flow simultaneously).
Codec settings.
Algorithm and scale used for speech quality evaluation.
Call clear-down Guard time.
Pause Pause duration. For current UEs, a pause time of at least 15 seconds (guard time) is
recommended.
However, this duration may be adjusted to local conditions or special testing goals, but
this must be reported.
If the pause duration is too short, side effects may occur, resulting in all kinds of
transient effects and distortions in measurement data. It should be made certain that
all the QoS parameters to be measured are not affected by the pause time.

The last transaction within a measurement sequence does not require a pause.
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14 ETSI TS 102 250-3 V2.2.1 (2011-04)
7.1.3 Additional transaction result definitions
For call set-up assessment beyond QoS data acquisition, typically a state model driven by suitable trigger-events
information combined with information from the call control engine is being used. This state model may also be used to
determine timing information for each phase.
Service usability, i.e. presence of a usable two-way connection, shall be verified by a procedure based on content test
transmissions within a given time window. If within this time window no connection can be verified, the setup attempt
shall be con
...