1. NGN interoperability 20th CJK UNIOT-WG 2010.11.24-26 TTC
Hideo HIMENO
Kaoru KENYOSHI 1

2. Summary
SG11 promotes to develop new handbook and draft Recommendations for NGN interoperability for NGN services.
SG16 are developing the series of the draft Recommendations for IPTV conformance testing.
The ITU-T IPTV interop events were held in Geneva (July 2010) and Singapore (September 2010).
Developing countries request ITU-T to provide global standard to improve NGN interoperability.
The interoperability would progress by improving the quality of the recommendations in ITU-T as the guidance to the developing countries.
The IOT events give the feedback and contribute to improve the accuracy of the recommendations.

3. Highlight of Current Activities
Nature of document
The draft guideline document “Handbook of testing” is developed on Q6/SG11. This draft will be consented at Jan.2011.
Due to the Q6/11 and WG4/11 joint meeting held at last NGN- GSI meeting(Sep.2010), it decided that the draft recommendation “Q.NGN interoperability” should be integrated with Handbook of testing.
On next SG11 meeting(Jan.2011), Q6 member will discuss that Handbook vs Q.NGN interoperability.
Service signaling protocol specification
It was regarded that IMS NGN service signaling service specification don’t exist on last meeting.
It was decided that these specifications will be developed in Q2,Q3/11.

4. Handbook of Testing
The Handbook goal is the assistance to Administrations and operator companies for the interoperability problems decision during NGN technical means and services implementation. The interoperability considering as a Global metric, including technical means interoperability, services interoperability, Quality of Services (QoS) classes and parameters interoperability. The NGN is the heterogeneous network and Global interoperability is the main problem in the NGN implementation process. The Handbook could be used vendors too.
The ITU-T was developed the new testing methodology for supporting Global Interoperability at Study Period – the model network (Recommendation Q.3900, September 2006). This methodology is supported by Recommendation Set Q.3901, Q.3903, Q.3904, Q under ITU-T activities and the International Telecommunication Testing Center project under ITU-D activities now.

5. Handbook vs Q.NGN Interoperability
Item
Handbook
NGN IOP Framework
Reference
X.290 series
Q.3900 series
Q.3401、Q.3402(Protocol set 1)
Scope
Function, Load and stress, Conformance, interconnecting, Service, End to End, QoS, mobility
Service(VoIP, IPTV, Video Phone)
QoS, Security, Transport
Target
Logical function block on the inside network
Product connected at UNI, SNI on external network
Interface
FEs I/F
Service testing is Not described
External I/F：UNI,NNI,ANI,SNI
Internal I/F：FEs I/F,Mx,Rx,Nx,Ex
Methodology
TTCN-3
Refer to Q.3900 series
Not TTCN-3
Refer to X.290 methodology

6. Fig. 5.1 Testing process architecture.
Adjustment for Handbook of testing
Testing procedures
The testing process shall incorporate two main levels responsible for NGN Technical means (TM) testing (NＡGN TM local testing, EUT-Equipment Under Test) and testing of comprehensive NGN solutions and the telecommunication services implemented with the aid of them (Network Under Test – NUT). The testing process structure is shown in Figure 5.1 in accordance with Recommendation Q.3900.
Level 1
NGN TM local testing
Level 2
NUT testing
1.1 Functional testing
2.1 Functional testing
1.2 Load&Stress testing
2.2 Interconnect testing
1.3 Conformance testing
2.3 Service testing
2.4 End-to-End testing
2.5 QoS testing
2.6 Mobility & Roaming testing
Q.NGN Interoperability maybe be belonged to “Service testing” and /or End-to-End testing.
Fig. 5.1 Testing process architecture.

7. A note in the meeting report of WP4/11
During the meeting it was discussed that ITU-T SG11 has specified the protocol specifications between the NGN components (UNI and NNI Profiles), but not the service specifications with the exception of RACS (User Network Interface - UNI). The networks and user profiles, define protocol specifications, some headers and refer to IETF protocols. Headers and protocols without service requirements can not be tested. Therefore, no interoperability tests can be provided at this moment. One possibility would be to adapt the existing IMS NGN service specifications including the existing test specification to ITU-T NGN. Other working parties are invited to provide inputs for service aspects of interoperability testing.
SG11 should study the requirements and protocol specifications for each service in order to develop the service test specifications.

8. Status of Service Protocol Specification on SG11
Service protocol specifications should be developed to promote the NGN IOP testing specifications.
SG11 had been developing service protocol specifications before.
(Sep.2009 Q2 Meeting Report)
Because Q.CDIV, Q.CONF, Q.ECT, Q.hold, and Q.OIP/OIR did not received any contribution before this meeting, the meeting agreed that these work items are canceled.
Rec.of Supplementary services　(Q.3600-Q.3649 : Service and session control protocols – supplementary services)　
Q.3610: Signalling requirements and protocol profiles for customized ring-back tone service (CRBT)
Q.3611: Signalling requirements and protocol profiles for NGN customized ringing tone service (CRT)
Q Suppl. 60: Service flows for customized multimedia ring- back tone (CRBT) and customized multimedia ringing tone (CRT) services

9. Missing IMS NGN service specifications in ITU-T
Development of IOP testing specification needs signaling protocol spec
External Interface
Internal Interface
UNI
NNI
ANI
SNI Mx Rx Nx Ex …
VoIP
Basic call
Q.3402
Q.3401
N/A
PSTN/ISDN simulation services defined in ITU-T Rec. Q.2211
OIP/OIR
TIP/TIR
MCID, ACR
CDIV, HOLD
CB, CCBS
CW, MWI
CONF, AOC
ECT, RC
UPT
CRBT/CRT
IPTV
Broadcast services
(Linear TV)
H.701
H.721
H.740
H.750
H.761
H.762
H.770
on-demand service
(VoD)
advertising services
Video Phone

10. Status of ITU-T, TISPAN, 3GPP IMS services signaling protocol spec
Targeting services to start developing from next ITU-T SG11 meeting
ITU-T
TISPAN
3GPP
OIP
Originating identification presentation － TS TS
OIR
Originating identification restriction
TIP
Terminating identification presentation TS TS
TIR
Terminating identification restriction
MCID
Malicious communication identification TS TS
ACR
Anonymous communication rejection TS TS
CDIV
Communication diversion TS TS
HOLD
Communication hold TS TS CB
Communication barring
CCBS
Completion of communication to busy subscriber TS TS CW
Communication waiting TS TS
MWI
Message waiting indication TS TS
CONF
Conference TS TS
AOC
Advice of charge TS TS
ECT
Explicit communication transfer TS TS RC
Reverse charging
UPT
Universal personal telecommunication
CRBT
Customized ring-back tone
Q.3610
CRT
Customized ringing tone
Q.3611

11. Discussion on how to develop IMS NGN Service Protocol Specifications
Option 1 : Referring TISPAN or 3GPP specification
Development of one service protocol set, pointing to and modifying to TISPAN or 3GPP specifications.
Option 2 : Based on TISPAN or 3GPP specification
Development of each service protocol specification, referring to and modifying TISPAN or 3GPP specifications.
Option 3 : Original service specification
Try to develop new original service supplement service protocol specifications. (ex. CCSA / TTA / TTC spec to ITU-T)

12. Challenge
Protocol specifications are not developed in SG11 therefore no interoperability tests can be provided for PSTN/ISDN simulation services.
Accelerate the on going study for VoIP conformance testing and initiate the new work item for VoIP interoperability testing.
Harmonization and/or integration of separate discussions in Q.5/SG13 and Q.8, 9,10/SG11 relating to physical architecture for NGN interoperability.
Let's discuss and develop the video phone and FMC interoperability testing specification as the future step.