ETSI TS 186 025-2 V2.1.1 (2011-01)

Telecommunications and Internet Converged Services and Protocols for Advanced Networking (TISPAN); IMS/PES Performance Benchmark; Part 2: Subsystem Configurations and Benchmarks

DTS/TISPAN-06053-2-NGN-R2

General Information

• Status: Published
• Publication Date: 25-Jan-2011
• Technical Committee: TISPAN 6 - TISPAN Testing
• Current Stage: 12 - Completion
• Due Date: 26-Jan-2011
• Completion Date: 26-Jan-2011

Standards Content (Sample)

Technical Specification
Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
IMS/PES Performance Benchmark
Part 2: Subsystem Configurations and Benchmarks

2 ETSI TS 186 025-2 V2.1.1 (2011-01)

Reference
DTS/TISPAN-06053-2-NGN-R2
Keywords
IMS, ISDN, PSTN, performance
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ETSI
3 ETSI TS 186 025-2 V2.1.1 (2011-01)
Contents
Intellectual Property Rights . 5
Foreword . 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 . 8
4 System Under Test (SUT) . 8
5 Use cases . 10
5.1 ISDN Use cases . 10
5.1.1 ISDN - ISDN Use case 1 . 10
5.1.1.1 ISDN - ISDN Scenario 1.1 Basic call with BC= speech - enblock sending . 10
5.1.1.2 ISDN - ISDN Scenario 1.2 Basic call with BC= speech - enblock sending . 10
5.1.1.3 ISDN - ISDN Scenario 1.3 Basic call - overlap sending with BC= speech . 10
5.1.1.4 ISDN - ISDN Scenario 1.4 Basic call with BC= 3,1 KHz audio - Fax with 33,6 kbit/s . 10
5.1.1.5 ISDN - ISDN Scenario 1.5 Basic call with BC= 3,1 KHz audio - Fax with 14,4 kbit/s . 11
5.1.1.6 ISDN - ISDN Scenario 1.6 Basic call with BC= 3,1 kHz with PI#3 . 11
5.1.1.7 ISDN - ISDN Scenario 1.7 Basic call with BC= 3,1 kHz with PI#3 . 11
5.1.1.8 ISDN - ISDN Scenario 1.8 Basic call with BC= 3,1 kHz - Modem V.32 bis (4,8 kbit/s, 9,6 kbit/s
14,4 kbit/s) . 11
5.1.1.9 ISDN - ISDN Scenario 1.9 Basic call with BC= 3,1 kHz - Modem V.34 (up to 33,6 kbit/s) . 11
5.1.1.10 ISDN - ISDN Scenario 1.10 Basic call with BC= UDI - enblock sending . 11
5.1.1.11 ISDN - ISDN Scenario 1.11 Basic call with BC= UDI - enblock sending . 11
5.1.1.12 ISDN - ISDN Scenario 1.12 - called user is user determined user busy . 11
5.1.1.13 ISDN - ISDN Scenario 1.13 - no answer from the called user . 11
5.1.2 ISDN- PSTN Use case 2 . 11
5.1.2.1 ISDN - PSTN Scenario 2.1 Basic call with BC= speech - enblock sending . 11
5.1.2.2 ISDN - PSTN Scenario 2.2 Basic call with BC= speech - enblock sending . 12
5.1.2.3 ISDN - PSTN Scenario 2.3 Basic call - overlap sending with BC= speech . 12
5.1.2.4 ISDN - PSTN Scenario 2.4 Basic call with BC= 3,1 KHz audio - Fax with 33,6 kbit/s . 12
5.1.2.5 ISDN - PSTN Scenario 2.5 Basic call with BC= 3,1 KHz audio - Fax with 14,4 kbit/s . 12
5.1.2.6 ISDN - PSTN Scenario 2.6 Basic call with BC= 3,1 kHz - Modem V.32 bis (4,8 kbit/s, 9,6 kbit/s
14,4 kbit/s) . 12
5.1.2.7 ISDN - PSTN Scenario 2.7 Basic call with BC= 3,1 kHz - Modem V.34 (up to 33,6 kbit/s) . 12
5.1.2.8 ISDN - PSTN Scenario 2.8 - called user is user determined user busy . 12
5.1.2.9 ISDN - PSTN Scenario 2.9- no answer from the called user . 12
5.1.3 PSTN - ISDN Use Case 3 . 12
5.1.3.1 PSTN - ISDN Scenario 3.1 Basic call. The call is released from the calling user . 12
5.1.3.2 PSTN - ISDN Scenario 3.2 Basic call The call is released from the called user . 12
5.1.3.3 PSTN - ISDN Scenario 3.3 Basic call with BC= 3,1 KHz audio - Fax with 33,6 kbit/s . 13
5.1.3.4 PSTN - ISDN Scenario 3.4 Basic call with BC= 3,1 KHz audio - Fax with 14,4 kbit/s . 13
5.1.3.5 PSTN - ISDN Scenario 3.5 Basic call with BC= 3,1 KHz audio - Modem V.90 . 13
5.1.3.6 PSTN - ISDN Scenario 3.6 - called user is user determined user busy . 13
5.1.3.7 PSTN - ISDN Scenario 3.7 - no answer from the called user . 13
5.1.4 PSTN - PSTN Use case 4 . 13
5.1.4.1 PSTN - PSTN Scenario 4.1 Basic call. The call is released from the calling user . 13
5.1.4.2 PSTN - PSTN Scenario 4.2 Basic call The call is released from the called user. . 13
5.1.4.3 PSTN - PSTN Scenario 4.3 Basic call with Fax with 33,6 kBit/s (Super G3 Fax) . 13
5.1.4.4 PSTN - PSTN Scenario 4.4 Basic call with Fax with 14,4 kBit/s . 13
5.1.4.5 PSTN - PSTN Scenario 4.5 Basic call with BC= 3,1 KHz audio - Modem V.34 (up to
33,6 kbit/s) . 13
ETSI
4 ETSI TS 186 025-2 V2.1.1 (2011-01)
5.1.4.6 PSTN - PSTN Scenario 4.6 Basic call with BC= 3,1 KHz audio - Modem V.32 bis (4,8 kbit/s,
9,6 kbit/s 14,4 kbit/s) . 14
5.1.4.7 PSTN - PSTN Scenario 4.7 - called user is user busy . 14
5.1.4.8 PSTN - ISDN Scenario 4.8 - no answer from the called user . 14
5.2 Metrics and design objectives . 14
5.2.1 Delay probability - non-ISDN or mixed (ISDN - non-ISDN) environment . 14
5.2.2 Speech quality analysis . 18
5.3 Call Profiler Traffic Patterns . 19
5.3.1 Saw Tooth . 19
5.3.2 Blast . 20
5.3.3 Rolling Blast . 20
5.3.4 Ramp . 20
5.3.5 Steady Call Rate . 20
5.3.6 Poisson Distribution . 20
5.4 Load Concepts and Definitions . 21
5.4.1 Processor Load . 21
5.4.2 Reference Call and Workload Factors . 21
Annex A (informative): Calls flows . 23
Annex B (informative): Load profiles examples . 30
Annex C (informative): Load traffic calculation . 31
C.1 General . 31
C.2 Calculation base on originated/ terminated traffic . 31
C.3 ITU-T load definitions. 32
C.3.1 Reference loads . 32
C.3.1.1 Reference load on incoming interexchange circuits . 32
C.3.1.2 Reference load on subscriber lines (originating traffic) . 32
C.4 High load reserve . 33
C.5 Overload . 33
Annex D (informative): Test reports . 34
D.1 Example of a Call Detail report . 34
D.2 Example of a call summary report . 35
D.3 Example of a voice summary report . 35
D.4 Example of a voice quality detail report. 36
Annex E (informative): Bibliography . 37
History . 38

ETSI
5 ETSI TS 186 025-2 V2.1.1 (2011-01)
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 Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN).
The present document is part 2 of a multi-part deliverable covering the IMS/NGN Performance Benchmark, as
identified below:
Part 1: "Core Concepts";
Part 2: "Subsystem Configurations and Benchmarks";
Part 3: "Traffic Sets and Traffic Profiles";
Part 4: "Reference Load network quality parameters".
ETSI
6 ETSI TS 186 025-2 V2.1.1 (2011-01)
1 Scope
The present document is for an initial release of a PSTN/ISDN Emulation Sub-system (PES) performance benchmark.
The same tests can be used also for legacy PSTN/ISDN networks or for inter-working tests between PSTN/ISDN
emulation subsystem and legacy PSTN and ISDN. The metrics measured and reported are for performance of this
subsystem under a communications application load.
The present document is the second part of the multi-part deliverable which consists of four parts.
TS 186 025-1 [1] contains the overall benchmark descriptions, architectures, processes, and information models that are
common to all specific benchmarking scenarios.
The present document contains the specific benchmarking use-cases and scenarios, along with scenario specific
metrics and design objectives. It also defines the SUT configuration parameters. This part also contains any
required extensions to the overall descriptions present in the present document, if necessary for the specific
scenario.
TS 186 025-3 [i.1] defines an initial benchmark test through the specification of a traffic set, traffic-time profile and
benchmark test procedure.
TS 186 025-4 [i.2] defines Reference Load network quality parameters for the use cases defined in the present
document.
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] ETSI TS 186 025-1: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); IMS/PES Performance Benchmark Part 1: Core Concepts".
[2] ITU-T Recommendation Q.543: "Digital exchange performance design objective".
[3] ETSI TS 183 036: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); ISDN/SIP interworking; Protocol specification".
[4] ETSI TS 124 229: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; IP multimedia call control protocol based on Session
Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 (3GPP TS 24.229 )".
[5] ETSI TS 183 043: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); IMS-based PSTN/ISDN Emulation; Stage 3 specification".
ETSI
7 ETSI TS 186 025-2 V2.1.1 (2011-01)
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] ETSI TS 186 025-3: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); IMS/PES Performance Benchmark Part 3 : Traffic Sets and
Traffic Profiles".
[i.2] ETSI TS 186 025-4: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); IMS/PES Performance Benchmark; Part 4: Reference Load
network quality parameters".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
background load: workload applied to an SUT during a benchmark test, for the purpose of consuming SUT resources
during a benchmark test and changing the traffic intensity at which the capacity of the SUT is reached
benchmark report: document generated at the conclusion of a test procedure containing the metrics measured during
the execution of the test and/or computed from the data collected in the benchmark log
benchmark test: procedure by which a test system interacts with a System Under Test to measure its behaviour and
produce a benchmark report
configuration: specification of a subset of IMS/PES architectural elements and metrics for which collection of
benchmark tests can be defined
design objective: probabilistic model of delay and failure requirements for SUT, associated with a use-case, specified
by threshold values and probabilities for delay and scenario failure.
idle load: load that is not dependent on the traffic or other external activities
maximum capacity: maximum processor load that a processor can handle without rejecting new calls
metric: performance measurement of SUT reported in a benchmark report
parameter: attribute of a SUT, test system, system load, or traffic set whose value is set externally and prior to a
benchmark test, and whose value affects the behaviour of the benchmark test
processor load: part of time the processor executes work, normally expressed in percent
NOTE: The processor load consists of Idle load, Traffic load and Usage load.
Reference Call (RC): basic ISUP to ISUP call connected through two MGW in the same MGC domain
test parameters: parameters whose values determine the behaviour of a benchmark test
test procedure: specification of the steps to be performed by a benchmark test
test scenario: specific path through a use-case, whose implementation by a test system creates a system load
test system: collection of hardware and software which presents a system load to a system under test and collects data
on the system under test's performance, from which metrics can be computed
traffic load: load that results from handling traffic events that are directly related to calls; this load varies with the
traffic intensity
traffic-time profile: evolution of the average scenario over a time interval
ETSI
8 ETSI TS 186 025-2 V2.1.1 (2011-01)
traffic set: mixture of traffic scenarios
usage load: load that is reserved for the administrations operation and maintenance activities during busy hour
workload: number of reference calls per second (RC/s)
NOTE: It is calculated by multiplying calls per second by its corresponding WLF.
workload factor: traffic load for different types of calls in relation to the traffic load of the reference call (ISUP call)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
APS Attempts Per Second
BC Bearer Capability
BHCA Busy Hour Call Attempts
CLIP Calling Line Identification Presentation
CW Communication Waiting
DO Design Objective
IMS IP Multimedia Subsystem
ISDN Integrated Services Digital Network
MCID Malicious Communication Identification
MGC Media GateWay Controler
MGW Media GateWay
MHT Mean Holding Time
NGN Next Generation Networks
PES PSTN/ISDN Emulation Sub-system
PIXIT Protocol Implementation eXtra Information for Testing
PSTN Public Switched Telecommunications Network
RC Reference Call
SAPS Session Attempts Per Second
SUT System Under Test
UDI Unrestricted Digital Information
WLF WorkLoad Factor.
4 System Under Test (SUT)
The IMS/PES performance benchmark covers benchmark tests for the PSTN/ISDN Emulation Sub-system (PES), The
same tests can be used also for legacy PSTN/ISDN networks or for inter-working tests between PSTN/ISDN emulation
subsystem and legacy PSTN and ISDN. The following functional entities appear to be necessary from the perspective of
specifying information flows and ensuring the interoperability of services.
• Access Gateway Analogue line function
• Access Gateway BRI function
• Access Gateway PRI function
• Residential Gateway Analogue line function
• Residential Gateway BRI function
• Trunk Gateway function
• Access Call Server function
• Transit Call Server function
• Packet Handler Gateway function
• Media Gateway Controller function
ETSI
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9 ETSI TS 186 025-2 V2.1.1 (2011-01)
• Media Server Control Function
• Customer Location function
• IN Access Subsystem
• SIP Server Access Function
• Trunk Signalling Gateway
The Functional Architecture is shown in figure 1 in such a way that it can be seen that multiple implementation
architectures are possible. There are some fundamental points that should not be missed however. The first of these is
that we have gateways that convert legacy interfaces such as national analogue PSTN Z reference points and ISDN S or
T reference points into NGN interfaces. These are usually thought of as being H.248 interfaces but that is not the only
interface that can be used. Depending on the service set MGCP or interfaces carrying suitable information in SIP can be
used. The key point is that the information flow can carry the stimulus information traditionally needed in national
PSTNs to carry both line and register signalling from customers as well as specialised service signalling.
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ETSI
10 ETSI TS 186 025-2 V2.1.1 (2011-01)
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Figure 2: AGCF/VGW session processing model
5 Use cases
This clause defines a set of basic use cases which can be provided simultaneously. Described are ISDN - ISDN, ISDN -
PSTN and PSTN-PSTN use cases. They can be handled by the PSTN/ISDN emulation subsystem, by the legacy
PSTN/ISDN or as inter-working between PSTN/ISDN emulation subsystem and legacy PSTN and ISDN. Described are
user equipment actions.
5.1 ISDN Use cases
5.1.1 ISDN - ISDN Use case 1
5.1.1.1 ISDN - ISDN Scenario 1.1 Basic call with BC= speech - enblock sending
This use case represents the case when the call establishment using en-bloc sending is performed correctly. The call is
released from the calling user.
5.1.1.2 ISDN - ISDN Scenario 1.2 Basic call with BC= speech - enblock sending
This scenario represents the case when the call establishment using en-bloc sending is performed correctly. The call is
released from the called user.
5.1.1.3 ISDN - ISDN Scenario 1.3 Basic call - overlap sending with BC= speech
This scenario represents the case when the call establishment using overlap sending is performed correctly. The call is
released from the calling user.
5.1.1.4 ISDN - ISDN Scenario 1.4 Basic call with BC= 3,1 KHz audio - Fax with
33,6 kbit/s
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are not activated. The call is released from the calling user.
ETSI
11 ETSI TS 186 025-2 V2.1.1 (2011-01)
5.1.1.5 ISDN - ISDN Scenario 1.5 Basic call with BC= 3,1 KHz audio - Fax with
14,4 kbit/s
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are not activated. The call is released from the calling user.
5.1.1.6 ISDN - ISDN Scenario 1.6 Basic call with BC= 3,1 kHz with PI#3
This scenario represents the case when in the active call state (N10) the 3,1 kHz transfer is performed correctly. The call
is released from the calling user.
5.1.1.7 ISDN - ISDN Scenario 1.7 Basic call with BC= 3,1 kHz with PI#3
This scenario represents the case when in the active call state (N10) the 3,1 kHz transfer is performed correctly The call
is released from the called user.
5.1.1.8 ISDN - ISDN Scenario 1.8 Basic call with BC= 3,1 kHz - Modem V.32 bis
(4,8 kbit/s, 9,6 kbit/s 14,4 kbit/s)
This scenario represents the case when in the active call state (N10) the 3,1 kHz transfer is performed correctly The call
is released from the calling user.
5.1.1.9 ISDN - ISDN Scenario 1.9 Basic call with BC= 3,1 kHz - Modem V.34 (up to
33,6 kbit/s)
This scenario represents the case when in the active call state (N10) the 3,1 kHz transfer is performed correctly The call
is released from the calling user.
5.1.1.10 ISDN - ISDN Scenario 1.10 Basic call with BC= UDI - enblock sending
This scenario represents the case when the call establishment using en-bloc sending is performed correctly. The call is
released from the calling user.
5.1.1.11 ISDN - ISDN Scenario 1.11 Basic call with BC= UDI - enblock sending
This scenario represents the case when the call establishment using en-bloc sending is performed correctly. The call is
released from the called user.
5.1.1.12 ISDN - ISDN Scenario 1.12 - called user is user determined user busy
This scenario represents the case, when the called user is user determined user busy the network initiate call clearing to
the calling user with cause value # 17.
5.1.1.13 ISDN - ISDN Scenario 1.13 - no answer from the called user
This scenario represents the case when there is no answer from the called user ("no user responding"), the network
initiate call clearing to the calling user with the cause value # 18.
5.1.2 ISDN- PSTN Use case 2
5.1.2.1 ISDN - PSTN Scenario 2.1 Basic call with BC= speech - enblock sending
This scenario represents the case when the call establishment using en-bloc sending is performed correctly. The call is
released from the calling user.
ETSI
12 ETSI TS 186 025-2 V2.1.1 (2011-01)
5.1.2.2 ISDN - PSTN Scenario 2.2 Basic call with BC= speech - enblock sending
This scenario represents the case when the call establishment using en-bloc sending is performed correctly. The call is
released from the called user.
5.1.2.3 ISDN - PSTN Scenario 2.3 Basic call - overlap sending with BC= speech
This scenario represents the case when the call establishment using overlap sending. The call is released from the
calling user. The call is released from the calling user.
5.1.2.4 ISDN - PSTN Scenario 2.4 Basic call with BC= 3,1 KHz audio - Fax with
33,6 kbit/s
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are not activated. The call is released from the called user.
5.1.2.5 ISDN - PSTN Scenario 2.5 Basic call with BC= 3,1 KHz audio - Fax with
14,4 kbit/s
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are not activated. The call is released from the called user.
5.1.2.6 ISDN - PSTN Scenario 2.6 Basic call with BC= 3,1 kHz - Modem V.32 bis
(4,8 kbit/s, 9,6 kbit/s 14,4 kbit/s)
This scenario represents the case when in the active call state (N10) the 3,1 kHz transfer is performed correctly The call
is released from the calling user.
5.1.2.7 ISDN - PSTN Scenario 2.7 Basic call with BC= 3,1 kHz - Modem V.34 (up
to 33,6 kbit/s)
This scenario represents the case when in the active call state (N10) the 3,1 kHz transfer is performed correctly The call
is released from the calling user.
5.1.2.8 ISDN - PSTN Scenario 2.8 - called user is user determined user busy
This scenario represents the case, when the called user is user determined user busy. the network initiates call clearing
to the calling user with cause value # 17.
5.1.2.9 ISDN - PSTN Scenario 2.9- no answer from the called user
This scenario represents the case when there is no answer from the called user ("no user responding"), the network
initiates call clearing to the calling user with the cause value # 18.
5.1.3 PSTN - ISDN Use Case 3
5.1.3.1 PSTN - ISDN Scenario 3.1 Basic call. The call is released from the calling
user
This scenario represents the case when the call establishment is performed correctly. The call is released from the
calling user.
5.1.3.2 PSTN - ISDN Scenario 3.2 Basic call The call is released from the called
user
This scenario represents the case when the call establishment is performed correctly. The call is released from the called
user.
ETSI
13 ETSI TS 186 025-2 V2.1.1 (2011-01)
5.1.3.3 PSTN - ISDN Scenario 3.3 Basic call with BC= 3,1 KHz audio - Fax with
33,6 kbit/s
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are not activated.
5.1.3.4 PSTN - ISDN Scenario 3.4 Basic call with BC= 3,1 KHz audio - Fax with
14,4 kbit/s
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are deactivated.
5.1.3.5 PSTN - ISDN Scenario 3.5 Basic call with BC= 3,1 KHz audio - Modem V.90
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are not activated.
5.1.3.6 PSTN - ISDN Scenario 3.6 - called user is user determined user busy
This scenario represents the case, when the called user is user determined user busy the network initiate call clearing to
the calling user.
5.1.3.7 PSTN - ISDN Scenario 3.7 - no answer from the called user
This scenario represents the case when there is no answer from the called user ("no user responding"), the network
initiate call clearing to the calling user.
5.1.4 PSTN - PSTN Use case 4
5.1.4.1 PSTN - PSTN Scenario 4.1 Basic call. The call is released from the calling
user
This scenario represents the case when the call establishment is performed correctly. The call is released from the
calling user.
5.1.4.2 PSTN - PSTN Scenario 4.2 Basic call The call is released from the called user.
This scenario represents the case when the call establishment is performed correctly. The call is released from the called
user.
5.1.4.3 PSTN - PSTN Scenario 4.3 Basic call with Fax with 33,6 kBit/s (Super G3
Fax)
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are deactivated.
5.1.4.4 PSTN - PSTN Scenario 4.4 Basic call with Fax with 14,4 kBit/s
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly. The echo cancellers in the GW are activated.
5.1.4.5 PSTN - PSTN Scenario 4.5 Basic call with BC= 3,1 KHz audio - Modem V.34
(up to 33,6 kbit/s)
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are deactivated.
ETSI
14 ETSI TS 186 025-2 V2.1.1 (2011-01)
5.1.4.6 PSTN - PSTN Scenario 4.6 Basic call with BC= 3,1 KHz audio - Modem V.32
bis (4,8 kbit/s, 9,6 kbit/s 14,4 kbit/s)
This scenario represents the case when in the active call state (N10) the Fax transfer on the media and B-channels is
performed correctly and the echo cancellers in the GW are activated.
5.1.4.7 PSTN - PSTN Scenario 4.7 - called user is user busy
This scenario represents the case, when the called user is user determined user busy the network initiate call clearing to
the calling user.
5.1.4.8 PSTN - ISDN Scenario 4.8 - no answer from the called user
This scenario represents the case when there is no answer from the called user ("no user responding"), the network
initiate call clearing to the calling user.
5.2 Metrics and design objectives
5.2.1 Delay probability - non-ISDN or mixed (ISDN - non-ISDN)
environment
This clause defines delay parameters related to non-ISDN environment and mixed (ISDN - non-ISDN) environment.
The values will be defined in TS 186 025-4 [i.2].
ETSI
15 ETSI TS 186 025-2 V2.1.1 (2011-01)
Table 1: delay parameters related to non-ISDN environment
and mixed (ISDN - non-ISDN) environment
Short description Parameter Q.543 [2] IMS equivalent
Detailed description
Local exchange call request delay - originating outgoing and internal traffic connections
ANALOGUE clause 2.3.2.1 [2] Home network -
SUBSCRIBER LINES For ANALOGUE SUBSCRIBER LINES, PES [5]
local exchange call call request delay is defined as the For ANALOGUE SUBSCRIBER LINES
request delay - interval from the instant when the off- connected to the AGCF or VGW
originating outgoing hook condition is recognizable at the Call request delay is defined as the interval
and internal traffic subscriber line interface of the exchange from the instant when the off-hook
connections until the exchange begins to apply dial condition is recognizable at the subscriber
tone to the line. The call request delay line interface of the AGCF/VGW until the
interval is assumed to correspond to the AGCF/VGW begins to apply dial tone to
period at the beginning of a call attempt the line. The call request delay interval is
during which the exchange is unable to assumed to correspond to the period at the
receive any call address information from beginning of a call attempt during which the
the subscriber. AGCF/VGW is unable to receive any call
address information from the subscriber.
ISDN SUBSCRIBER clause 2.3.2.2 [2] Home network
LINES Local exchange call request delay - ISDN [3]
local exchange call Call request delay is defined as the Call request delay is defined as the interval
request delay - interval from the instant at which the from the instant at which the SETUP
Overlap sending SETUP message has been received from message has been received from the
the subscriber signalling system until the subscriber signalling system until the
SETUP ACKNOWLEDGE message is SETUP ACKNOWLEDGE message is
passed back to the subscriber signalling passed back to the subscriber signalling
system IMS [4]- Call request delay is defined as
the interval from the instant at which the
INVITE message has been received from
the SIP subscriber until the 100 Trying is
passed back to the subscriber.
ISDN SUBSCRIBER clause 2.3.2.3 [2] Home network -
LINES For DIGITAL SUBSCRIBER LINES using ISDN [3]
local exchange call en-bloc sending, call request delay is For ISDN using en-bloc sending, call
request delay- defined as the interval from the instant at request delay is defined as the interval
Enblock sending which the SETUP message is received from the instant at which the SETUP
from the subscriber signalling system message is received from the subscriber
until the CALL PROCEEDING message signalling system until the CALL
is passed back to the subscriber PROCEEDING message is passed back to
signalling system. the subscriber signalling system.
IMS [4]
Call request delay is defined as the interval
from the instant at which the INIVITE
message is received from the subscriber
until the call 183 Session progress is
passed back to the SIP subscriber.
Alerting sending delay for terminating traffic (the users are in different locations, controlled by different
S-CSCF/P-CSCF)
ANALOGUE clause 2.3.6.1 [2] PES [5]
SUBSCRIBER LINES For calls terminating on ANALOGUE For calls terminating on ANALOGUE
Alerting sending SUBSCRIBER LINES, alerting sending SUBSCRIBER LINES, alerting sending
Delay for terminating delay is defined as the interval from the delay is defined as the interval from the
traffic instant when the last digit is available for instant when the last digit is available for
processing in the exchange until the processing in the exchange until the ringing
ringing tone is sent backwards toward the tone is sent backwards toward the calling
calling user. user.
ETSI
16 ETSI TS 186 025-2 V2.1.1 (2011-01)
Short description Parameter Q.543 [2] IMS equivalent
Detailed description
ISDN SUBSCRIBER clause 2.3.6.1.2 [2] ISDN [3]
LINES For calls termining on DIGITAL For calls termining on ISDN, the alerting
Alerting sending SUBSCRIBER LINES, the alerting sending delay is defined as the interval
Delay for terminating sending delay is defined as the interval from the instant that an ALERTING
traffic from the instant that an ALERTING message is received from the digital
message is received from the digital subscriber line signalling to the instant at
subscriber line signalling system to the which an 180 Ringing or ringing tone is
instant at which an ADDRESS sent backward toward the calling user
COMPLETE message is passed to the IMS [5]
interexchange signalling system or Call request delay is defined as the interval
ringing tone is sent backward toward the from the instant at which the 180 Ringing is
calling user. received from the terminating subscriber
until the 180 Ringing is passed back to the
originating SIP subscriber.
Alerting sending delay for internal traffic (the users are in same locations,
controlled by same S-CSCF/P-CSCF)
ANALOGUE clause 2.3.6.2 [2] PES [5]
SUBSCRIBER LINES
Alerting sending For calls terminating on ANALOGUE For calls terminating on ANALOGUE
Delay for internal SUBSCRIBER LINES, alerting sending SUBSCRIBER LINES, alerting sending
traffic delay is defined as the interval from the delay is defined as the interval from the
instant that the signalling information is instant that the signalling information is
available for processing in the exchange available for processing in the exchange
until ringing tone is applied to an until ringing tone is applied to an
ANALOGUE calling subscriber. ANALOGUE calling subscriber.
ISDN SUBSCRIBER clause 2.3.6.2 [2] ISDN [3]
LINES  For calls terminating on ISDN, alerting
Alerting sending For calls terminating on DIGITAL sending delay is defined as the interval
Delay for Internal SUBSCRIBER LINES, alerting sending from the instant that an ALERTING
traffic delay is defined as the interval from the message is sent to a ISDN user.
instant that an ALERTING message is IMS [4]
sent to a DIGITAL calling subscriber line Call request delay is defined as the interval
signalling system. from the instant at which the 180 Ringing is
received from the s
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