Mar del Plata, Argentina, 2 September 2009

InternationalTelecommunicationUnion

Mar del Plata, Argentina, 2 September 2009

Model networks as an instrument for global interoperability

Denis AndreevRapporteur of Q.10/11 ITU-T

Director of Technopark Central Research Telecommunication Institute

(ZNIIS)

Seminar on ITU-T hot topics for Standardization

(Mar del Plata, Argentina, 2 September 2009)

InternationalTelecommunicationUnionMar del Plata, Argentina, 2 September 2009 22

Reasons of necessity of NGN testing

Growth of the manufactured equipment nomenclature and software which realize NGN functionality and appear a lot of unify equipment (router with gateway functionality and etc.)Appear of new set of services which is realized without changes of network and independent of technologiesAbsence of guarantee quality of network performance compare with exist TDM network

Mar del Plata, Argentina, 2 September 2009


Purpose of NGN testing

NGN technologies harmonization, global principle on implementation and operation of NGN networks and usages


Exist situation ITU-T on area testing standardization

Present time

Conformance testingConformance testing which are included which are included protocols and interfaces testing protocols and interfaces testing (TTCN 1 (TTCN 1 (X.292-1995), TTCN 2 (X.292-1998), TTCN 3 (Z.140-(X.292-1995), TTCN 2 (X.292-1998), TTCN 3 (Z.140-2003)2003)

TSS&TP, PICS/PIXIT proformas for different protocols TSS&TP, PICS/PIXIT proformas for different protocols testing)testing)

FutureNGN based on the functional entity

which interwork with some protocols

Interoperability testingInteroperability testing (Q.3901)


Purposes ITU-T on testing standardization area

WTSA-08 Resolution 76“Global Interoperability”

Interoperability of technical means (TM) which realize the basic NGN functionality (Y.2012, Y.2010)NGN Services InteroperabilityQoS Interoperability


The approach of NGN testing

Functional Interop. testing – verification the functionality on TM (EUT) and system-network solutions (NUT) different vendors for compatibility in accordance with basic ITU-T Recs.Service testing – testing the services on scenarios “end-to-end” include call flow testing and testing with exist provider’s operation systems (Billing, OSS/BSS and etc.)QoS testing – testing the QoS parameters and RACF functionality


ITU-T Rec. Q.3900 as a global approach of testing

Purpose – determination Model network as a basic solution for NGN testing Model network – a network which simulates the capabilities similar to those available in present telecommunication networks, has a similar architecture and functionality and uses the same telecommunication equipment

Contents of Q.3900Classification of NGN TM regarding the NGN functionality (Y.2012)Determination of testing proceduresRequirements to Model network


Architecture of Model Network (Rec.Q.3900)

ACEAS

BS

MS MeS

Application stratum

PS MGC IMS

Session&Service Control stratum

SG MGW

Transport stratum

NGN-IADLegacy TE

Access stratumTNE

IP ATM SDH

Management system

Management stratum

Model Network

PSTN/ISDN PSN

PLMN3G/GSM

Internet


Classification of NGN TM (Rec. Q.3900)

9

Call Session Control SystemMedia Gateway Controller (MGC) S3, S7, S9, S10, S12

T10, T11, T12, T13

Proxy Server SIP (PS) S2, S3, S7, S11, S12

T10, T11, T12, T13

IP Multimedia Subsystem (IMS) S1, S3, S6, S7, S8, S10, S12, S13

T10, T11, T12, T13, T14, T15, T16, T17

Voice and signaling transmit systemMedia Gateway (GW) T7, T8

Signaling Gateway (SG) T8, T9

Transport Network Environment (TNE)

T5, T6, T8

Application serversApplication Server (AS) S4, S5, S6, S14, S15

Media server (MS) S4, S5, S6, S14, S15

Messaging Server (MeS) S4, S5, S6, S14, S15


Joint ZNIIS-ITU-D Project (ITTC)

Purpose – to create an International Telecommunication Testing Centre (ITTC) for testing new technologies, include NGN and train telecom specialists from developing countries

First resultsTesting the NGN system networks solutions on interoperability in accordance with ITU-T Rec. Q.3901:IMS and SoftswitchBBA


ITTC tasks

11

To search and removal problems and difficulties in TM before realizing it on the “live” network

To solve the interoperability TM different vendors

To save experience for implementation it on the activity of different telecom players

To verify NGN services and preparation the recommendations for implementing it on the exist networks


ITTC practical Model network


Global problems on functional Interoperability(ITTC ITU-ZNIIS joint project - CIS08-02)

Tariffication data lost in emergency situation in case of geographic redundancy

Absence of statistical data about IP characteristics sessions

Absence the QoS parameters and total layer for session and subscriber in tariffication data

IMS does not interop Absence of “Ring-back tone” Absence the possibility of T.38 realizing Problems with modem connection Different content of head field in SIP for IMS solutions Different syntax of parameters which are used in SIP

IMS


ITU-T (common services requirements – determination services and delivery content)

Y.2271 – common requirements and contents of services NGN rel.1

Y.2012, Y.2201 – requirements to voice services and instant messages

OMA-PoC – requirements to Push to Talk service (Push over cellular)

F.703, F.724 (VideoTel), F.733 (MMconf) – requirements to multimedia services

ETSI (requirements to additional data which is included in signaling protocols parameters for implementing each of services)

The set of supplementary services – TIP/TIR, OIP/OIR, HOLD, MWI и т.д.

Standardization services - exist situation


The global problems


The basic reasons of problems


The global standardization approach of NGN services


• Service definition, common service characteristics and service providing principle, in point of view operator and customer include: short description of service with imagine form of service (message, voice transmission and etc.), principle of location service in telecom networks and rules of customer’s access to the service, principle of service control procedure: activation, configure, unsubscribing, statistic and tariffication data

• Network requirements for providing service, include requirements to: numbering, identification, subscriber’s profile control, type of codec, parameters of QoS, security, and interworking with exist operators systems (accouting, law full intercept and etc.)

• Architecture requirements and requirements to functional elements, which are used for service realizing

• Equipment’s functional requirements

• Service scenario requirements

• Signaling protocols requirements for realizing service (call flow)

The scope of NGN service requirements template (ITU-T Rec.NGN_service)


Detail verification syntaxes of signaling protocols in the different equipment trough sending the messages with determined parameters

Service test specifications based on the TTCN-3

Example of ETSI service test specification

“Terminating Identification Presentation (TIR)”

The ETSI approach for service testing (TISPAN 06)


Detail verification syntaxes of signaling protocols in the different equipment trough sending the messages with determined parameters with TTCN-3 (like in ETSI)

Functional testing services (testing the functionality of equipment which is used for implementing services) include logic testing ("end-to-end")

Verification services with existing operators systems:

Accounting system Statistic system Operation and management system

The new approach of service testing (WP4/11 Q.10/11 Service test specification)


The real plans of service testing in ITTC

Home

PSTN

(495) XXX-XXXX

PLMN

(9XX) XXX-XXXX

Office

VoIP network

(499) XXX-XXXX

UAN

07:00 – 08:0019:00 – 22:00

08:00 – 09:0018:00 – 19:00

09:00 – 18:00

8-80X-XXX-XXXX

(495) XXX-XXXX

Incoming call to UAN customer

12:15

Home network

(495) XXX-XXXX

UPT

8-80X-XXX-XXXX

(495) XXX-XXXX

Инициация входящего вызов к абоненту с UPT

Visit network

(812) XXX-XXXX

UPT

Outgoing call from UPT subscriber

CLIPNumber of UPT subscriber

80Х-ХХХ-ХХХХ


History of testing research area in ITU-T

WTSA-04 (Brasilia, Oct. 2004)Creation of Q.8/11 “NGN test specification”

WTSA-08 (RSA, Dec.08)Creation WP4/11 “Test specifications”Continuation of Q.8/11 “Protocol Test Specifications for

NGN”Creation of new questionsQ.9/11 “Monitoring parameters for NGN protocols”Q.10/11 “Service test specification for NGN”Q.11/11 “QoS tests specification for NGN”Q.12/11 “NID and USN test specification”


The achievement results SG11 under responsibility of testingQQ..3900 3900 Methods of testing and model network Methods of testing and model network

architecture for NGN technical means testing as architecture for NGN technical means testing as applied to public telecommunication networks applied to public telecommunication networks (approved 09/06)(approved 09/06)

Q.3901 Q.3901 Integral testing. Tests and services' Integral testing. Tests and services' distribution for NGN technical means testing in distribution for NGN technical means testing in the model and operator networks the model and operator networks (approved (approved 01/08)01/08)

QQ.3902 .3902 Parameters to be monitored in the Parameters to be monitored in the process of operation when introducing NGN in process of operation when introducing NGN in PSTN PSTN (approved 01/08)(approved 01/08)

Q.3903 Q.3903 Formalized presentation of testing Formalized presentation of testing results results (approved 09/08)(approved 09/08)

Handbook on NGN technical means testing Handbook on NGN technical means testing as as applied to NGN technologies to be introduced on applied to NGN technologies to be introduced on PSTN networks PSTN networks (on development)(on development)


Plans of WP4/11 ITU-T

IMS TM and NUT testing (Draft Rec.Q.3904)

IMS/PES benchmarking

BBA testing (fixed, WiFi, WiMax) (Draft Rec.Q.3906.1, Rec.Q.3906.2 and Rec.Q.3906.3)

NIT between protocols NGN and TDM

“end-to-end” NGN testing (TS1, TS2) (Draft Rec.Q.3915)

NGN supplementary services testing (TIP/TIR, OIP/OIR, HOLD etc)

IPTV testing

NACF and RACF testing

QoS testing


KNOWLEDGE

DATABASE

с ZNIIS

Compliant to ITU-T Recommendation Q.3903


Virtual repository

Possibility for creation of dedicated area with restricted access to Knowledge Database for storing of different information of Administrations and operators (methodologies, testing reports, network schemes, normative documents and etc.)

Existence of virtual constructor of testing methodic, for development of these documents in the automatic mode using powerful set of libraries of tests of functionalities, conformance and interworking of different technical means, system and network solutions, protocols and services of NGN

Collection and distribution of testing results in the worldwide mode


On the preparation meeting for Council-09 on the

questions of WTSA-08 Resolution #76 implementation,

placed in Geneva (Switzerland) July 20-21 2009, Russian

Administration delegation has contributed initiative on

creation of international virtual labs based on Knowledge

Database of ITTC project for carrying out of remote

trainings of specialists from developing countries on the

questions of building, development, standardization and

testing of NGN

Virtual labs


Virtual Lab facilities

Virtual labs, providing the following functions:

− access of specialists from developing countries to the equipment management systems, installed on the ITTC Model Network through Knowledge Database website

− Performing of required network configurations

− Remote testing with further development of reports in the automatic mode

− Existence of GUI for Knowledge Database

− Remote trainings for specialists from developing countries on theoretical and practical skills of work with NGN equipment (implementation of WTSA-08 Res.76)


Consequence of Global interoperability

Global approach of network interworkingAppear transparent mechanisms for roaming and nomadism in the fixed and wireless networksAbsence the association of services with physical network infrastructureSubscriber freedom and possibility to satisfy a lot of information miracles


Resume for Model networks usages

• To find and solve disagreements in the equipment realization before introduction into the live network

• Solving compatibility issues and interchangeability of equipment from different vendors

• Accumulation of experience in part of solving compatibility problems on current operator netwroks

• Maintenance of new services and development procedures of its introduction into the live networks


Reducing of digital gap by sharing experience of introduction and maintenance of new technologies, implemented on the operators networks from developed countries, on the worldwide telecommunication market

Using ITTC as the effective mean of gathering experience and consolidation of high-level specialists and experts in the field of introductions, testing, standardization and maintenance of new telecommunication technologies

Performance of regional initiatives and private initiative projects for network operators in part of development qualifying standards, which determine entire approaches and rules in part of introduction of new technologies on the operator networks

Resume on implementing ITTC activities


Denis AndreevDenis Andreev

Rapporteur of Q.10 WP4/11Director of Technopark ZNIISCentral Science Research Telecommunication Institute (ZNIIS), Moscow

Tel: +7-495-368-8745Mob: +7-495-647-9603Fax: +7-495-368-9105Email: [email protected] cc: [email protected]

Thank you for attention

Documents

Mar del Plata, Argentina, 2 September 2009