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)
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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
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Purpose of NGN testing
NGN technologies harmonization, global principle on implementation and operation of NGN networks and usages
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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)
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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
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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
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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
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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
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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
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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
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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
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ITTC practical Model network
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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
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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
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The global problems
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The basic reasons of problems
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The global standardization approach of NGN services
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• 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)
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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)
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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)
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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
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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”
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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)
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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
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KNOWLEDGE
DATABASE
с ZNIIS
Compliant to ITU-T Recommendation Q.3903
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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
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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
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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)
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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
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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
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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
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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
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