ETSI TS 102 250-3 V2.4.1 (2019-11)

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

RTS/STQ-00224-3m

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 3: Typical procedures for Quality of Service
measurement equipment
2 ETSI TS 102 250-3 V2.4.1 (2019-11)

Reference
RTS/STQ-00224-3m
Keywords
3G, GSM, network, QoS, service, speech
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3 ETSI TS 102 250-3 V2.4.1 (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 . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Aim of measurement . 9
5 Classification of services . 10
5.1 Classification guidelines . 10
5.2 General structure of service descriptions . 10
6 General aspects for all types of services. 10
6.1 Set-up and control . 10
6.2 Phase and result classification . 11
7 Telephony measurements . 11
7.1 General aspects . 11
7.1.1 Transaction definition and transaction types. 11
7.1.2 Parameter overview . 12
7.1.3 Additional transaction result definitions . 12
7.1.4 Content quality . 13
7.1.5 Verification of usable two-way connection . 13
7.2 Speech telephony . 13
7.2.1 Transaction definition and transaction types for speech telephony . 13
7.2.2 Parameter overview for speech telephony . 14
7.2.3 Additional transaction results for speech telephony . 14
7.2.4 Content quality for speech telephony. 14
7.2.5 Verification of usable two-way connection for speech telephony . 14
7.3 Video telephony . 14
7.3.1 Transaction definition and transaction types for video telephony . 14
7.3.2 Parameter overview for video telephony . 14
7.3.3 Additional transaction result definitions for video telephony . 15
7.3.4 Content quality for video telephony . 15
7.3.5 Verification of usable two-way connection for video telephony . 15
7.3.6 Call setup considerations for MTSI calls . 15
7.4 Group Call . 15
7.4.1 Transaction definition and transaction types for group calls . 15
7.4.2 Parameter overview for group calls . 16
7.4.3 Additional transaction result definitions for group calls . 16
7.4.4 Content quality for group calls . 16
7.4.5 Verification of usable connection for group calls . 16
8 Store-and-forward services measurement . 17
8.1 Transaction description . 17
8.1.1 General aspects - Transaction phase and parameter overview . 17
8.1.2 Additional transaction result definitions . 18
8.1.3 Content quality for Store-and-Forward Services . 18
8.2 SMS measurements . 18
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4 ETSI TS 102 250-3 V2.4.1 (2019-11)
8.2.1 General aspects of SMS measurements . 18
8.2.2 Transaction definitions and transaction types for SMS . 19
8.2.3 Testing mode for SMS-MT . 19
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 . 20
8.3 MMS . 20
8.3.1 General aspects of MMS measurements . 20
8.3.2 Transaction definitions and transaction types for MMS . 20
8.3.3 Transaction phase and parameter overview for MMS . 21
8.3.4 Additional transaction result definitions for MMS . 22
8.3.5 Content quality for MMS . 22
8.4 E-Mail . 22
8.4.1 Transaction definitions for E-Mail . 22
8.4.1.1 Overview and Protocols . 22
8.4.1.2 Reference content . 23
8.4.1.3 Content integrity . 23
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 Overview and Upload scenario . 24
8.4.2.2 Download scenario . 25
8.4.2.3 End-to-end scenario with IMAP4 . 26
8.5 SDS . 27
8.5.1 General aspects of SDS measurements . 27
8.5.2 Transaction phase and parameter overview for SDS . 28
8.5.3 Possible transaction results for SDS . 28
8.5.4 Content quality for SDS . 28
9 Data measurements. 28
9.1 Common aspects . 28
9.1.1 Transaction definition and transaction types for data measurements . 28
9.1.2 Server types . 28
9.1.3 Test data content . 29
9.1.4 Transaction phase and parameter overview . 29
9.1.4.1 General . 29
9.1.4.2 Packet-switched access . 30
9.1.4.3 Circuit-switched access . 30
9.1.4.4 Direct Services . 30
9.1.5 Possible transaction results . 31
9.1.6 Content quality . 31
9.1.7 Content integrity . 31
9.2 FTP . 32
9.2.1 Transaction definition and transaction types for FTP . 32
9.2.2 Transaction phase and parameter overview for FTP . 32
9.2.3 Possible transaction results for FTP . 32
9.2.4 Content quality for FTP . 32
9.2.5 Content integrity for FTP . 32
9.3 HTTP . 32
9.3.1 Transaction definition and transaction types for HTTP . 32
9.3.2 Transaction phase and parameter overview for HTTP. 32
9.3.3 Possible transaction results for HTTP . 32
9.3.4 Content quality for HTTP . 33
9.3.5 Content integrity for HTTP . 33
9.4 E-mail . 33
9.5 WAP . 33
9.5.1 Transaction definition and transaction types for WAP . 33
9.5.2 Transaction phase and parameter overview for WAP . 34
9.5.3 Possible transaction results for WAP . 35
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5 ETSI TS 102 250-3 V2.4.1 (2019-11)
9.5.4 Content quality for WAP . 35
9.5.5 Content integrity for WAP . 36
9.6 Streaming Video . 36
9.6.1 Transaction definition and transaction types for streaming video . 36
9.6.2 Transaction phase and parameter overview for streaming video . 36
9.6.3 Possible transaction results for Streaming Video. 36
9.6.4 Content quality for Streaming Video . 36
9.6.5 Content integrity for Streaming video . 36
9.7 Media Download . 37
9.7.1 Overall description . 37
9.7.1.1 Transaction definition and types for Media Download - OMA network elements . 37
9.7.1.2 OMA download use cases . 38
9.7.1.2.1 Combined OMA download use case . 38
9.7.1.2.2 Separate OMA download use case . 39
9.7.1.3 DRM use cases . 40
9.7.1.3.1 Combined delivery DRM use case . 40
9.7.1.3.2 Separate delivery DRM use case . 40
9.7.2 Transaction phase and parameter overview for Media Download . 41
9.7.2.1 Overview of basic parameters for Media Download . 41
9.7.2.2 Media Download subphases . 42
9.7.2.3 Combined OMA download and combined delivery DRM use case. 43
9.7.2.4 Separate OMA download and combined delivery DRM use case . 43
9.7.2.5 Combined OMA download and separate delivery DRM use case . 43
9.7.2.6 Separate OMA download and separate delivery DRM use case . 44
9.7.2.7 Additional information about parameters for Media Download . 44
9.7.2.8 Recommended Testing Method for Media Download . 44
9.7.3 Possible transaction results for Media Download . 44
9.7.4 Content quality for Media Download . 44
9.7.5 Content integrity for Media Download . 44
Annex A (informative): Bibliography . 45
History . 46

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6 ETSI TS 102 250-3 V2.4.1 (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
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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 3 of a multi-part deliverable. Full details of the entire series can be found in part 1 [4].
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
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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7 ETSI TS 102 250-3 V2.4.1 (2019-11)
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
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
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at .
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
[1] Recommendation ITU-T P.56: "Objective measurement of active speech level".
[2] Void.
[3] 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".
[4] 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".
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] 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 mobile networks; Part 2: Definition of Quality of Service parameters and their
computation".
[i.6] ETSI TS 100 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 2: Air Interface (AI)".
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8 ETSI TS 102 250-3 V2.4.1 (2019-11)
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms 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: time within a message has to 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 Symbols
Void.
3.3 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
FR Failure Rate
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9 ETSI TS 102 250-3 V2.4.1 (2019-11)
FTP File Transfer Protocol
GC Group Call
GGSN Gateway GPRS Support Node
GSM Global System for Mobile communications
HTML Hyper Text Markup Language
HTTP Hyper Text Transfer Protocol
ICMP Internet Control Management Protocol
IP Internet Protocol
MEDT Maximum Expected Delivery Time
MMS Multimedia Messaging Service
MOF Mobile Originated to Fixed
MOM Mobile Originated to Mobile
MT Mobile Terminated
MTM Mobile Terminated, originator is also a Mobile unit
MTSI Multimedia Telephony over IMS
MTU Maximum Transmission Unit
NAT Network Address Translation
OMA Open Media Access
OS Operating System
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
SDP Service Delivery Platform
SDS Short Data Service
SDS-TL Short Data Service Transport Layer
SMS Short Message Service
SMSC Short Message Service Centre
SMS-MO SMS Mobile Originated
SMS-MT SMS Mobile Terminated
SMTP Simple Mail Transfer Protocol
TCP/IP Transmission Control Protocol/Internet Protocol
TETRA Terrestrial Trunked Radio
UDP User Datagram Protocol
UE User Equipment
URL Uniform Resource Locator
WAP Wireless Application Protocol
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 ETSI TS 102 250-2 [i.5]. This is to determine the network quality for the
respective transactions from the user's view.
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10 ETSI TS 102 250-3 V2.4.1 (2019-11)
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.
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 shall 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.
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11 ETSI TS 102 250-3 V2.4.1 (2019-11)
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 ETSI 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.
Depending on the used radio access technology the duration of required pauses may differ significantly.
However, this duration may be adjusted to local conditions or special testing goals, but this shall 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.
Tables 1 to 4 void
7 Telephony measurements
7.1 General aspects
7.1.1 Transaction definition and transaction types
Clause 7 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.
The basic transaction for telephony testing is equivalent to a single call to a counterpart extension.
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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.
The last transaction within a measurement sequence does not require a pause.
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 considered as failed and the call attempt be terminated.
A call is active only as long as both sides consider it to be active. A call is therefore considered to be dropped if either
side detects a dropped call.
Above definitions lead to the following decision tree for the outcome of a call (figure 1 includes the end-of-call cases).
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13 ETSI TS 102 250-3 V2.4.1 (2019-11)
Call Attempt
Access Failure
Successful network access
Setup Failure
Setup Success
Dropped Call
Call not dropped
Completed Call
Figure 1: Telephony measurement outcome
7.1.4 Content quality
For content quality assessment, data is generated at the receiving end. For downlink content, data storage is therefore
straightforward; quality-assessment data is simply included with other data items making up the result file. For uplink
content, at some point in time results from the involved B-parties have to be combined with the data from the
originating A-party.
For assessing content quality of complete transmitted speech samples, at least the following methods are possible:
• Real-time assessment (streaming mode), where the quality assessment algorithm continuously outputs the
defined quality measures.
• "Offline" assessment, where content is first recorded in some way and later being processed.
Data processing shall make sure that only such content quality data is used which lies inside the "connection active"
time window and is in line with one of the defined content quality parameters.
7.1.5 Verification of usable two-way connection
Only calls with a valid two-way end-to-end information connection shall be considered for content quality assessment
(valid calls).
A non-valid call shall be treated like a dropped call, with a modifier indicating this particular cause.
7.2 Speech telephony
7.2.1 Transaction definition and transaction types for speech telephony
See clause 7.1.1.
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14 ETSI TS 102 250-3 V2.4.1 (2019-11)
7.2.2 Parameter overview for speech telephony
See clause 7.1.2.
7.2.3 Additional transaction results for speech telephony
See clause 7.1.3.
7.2.4 Content quality for speech telephony
See clause 7.1.4.
7.2.5 Verification of usable two-way connection for speech telephony
This shall be verified by a procedure based on audio test transmissions within a given time window. If within this time
window no audio connection can be verified, the setup attempt shall be considered to be failed and the call attempt be
terminated.
NOTE: To make sure an audio connection is valid, it is assumed that an appropriate kind of data analysis on
audio flow is performed (see Recommendation ITU-T P.56 [1]).
7.3 Video telephony
7.3.1 Transaction definition and transaction types for video telephony
The basic transaction for video telephony testing is equivalent to a single call to a counterpart extension.
Due to existing usage and hardware, typical video calls will be between UEs, so no further call types are distinguished.
Unlike other services, it is currently assumed that video-call testing will require a high degree of abstraction in the sense
that testing-system architectures may differ quite thoroughly from those found in "real connections". At the time of
writing, there are no known terminal-based protocol stacks delivering data necessary for testing or QoS assessment.
Therefore, it is assumed that PC-based implementations of video protocol stacks will have to be used, where the UE
serves only as the modem part of the connection.
It is further assumed that typical tests will use data which serve as load and carry diagnostic data at the same time.
7.3.2 Parameter overview for video telephony
NOTE: Content flow will typically be governed by the video protocol and is assumed to involve simulta
...