1. Jean-Yves Cochennec Vice Chair ITU-T SG13
Session 5 NGN and Internet : redundant or complementary ? Conclusions & Recommendations
Jean-Yves Cochennec
Vice Chair ITU-T SG13
4/27/2019

2. Presentations in Session 5
NGcN in Korea - Chae Sub Lee, Korea Telecom
Presentation 2 :
Current technical directions in IETF (with emphasis on wireless) - James Kempf, DoCoMo Labs USA
Presentation 3 :
An operator's view on NGN (commonalities and differences with the Internet) - Bruno Chatras, France Telecom R&D
4/27/2019

3. Overview of issues in session 5 (1)
There is a general consensus that the Internet will be a basic element for implementing NGN (the debate redundant/complementary seems to be over)
It is further recommended to rely on Internet technology rather than Internet philosophy (debate : location of intelligence, suggestion : “intelligence from the network where appropriate”)
On the other hand the IETF sees “NGN not fundamentally different from the always morphing Internet”
So, now the question would better be :
How the Internet should evolve to meet NGN requirements ?
4/27/2019

4. Overview of issues in the session (2)
Ongoing activities in the IETF still keep the same line (“standardize technology that does not differentiate between real-time and data traffic”),
The IETF covers areas where standards are expected for NGN (transport, security, emergency etc), but not all (billing, lawful interception)
However, there is a concern that evolutions of the Internet lead to a proliferation of new protocols difficult to manage for implementers and operators
4/27/2019

5. Overview of issues in the session (3)
Two major (and difficult !) issues are clearly identified for NGN standardization : Interoperability issues and Regulatory issues
Interoperability issues are everywhere :
Interworking with legacy networks
Interworking inherent to newly defined/deployed protocols (the example of SIP is stressed with its too many profiles)
Interoperability between networks elements and networks domains
Regulatory issues are inherent to a basic requirement of NGN which is to provide open interfaces, but they are sometimes hidden behind technologies or new services (for example portability and "private television broadcasting" have been cited)
4/27/2019

6. Recommendations from session 5
1. The IP-based networks will be the backbone of NGN
2. Interoperability is the key issue in NGN
Standard bodies should be aware that evolutions and completion of the IP-based networks should take into account NGN guidelines in order to solve interoperability issues
...which means we have to provide them very quickly !
The standardization of NGN does need close collaboration between SDOs, all actors have to actively collaborate : service providers, network operators, equipment manufacturers
4/27/2019