SG13 thanks the IETF IAB for its liaison statement contained in SG13 TD
GEN 0050 regarding Y.2015, Y.FAid-loc-split and Y.ipv6split.
1) Status of Recommendation ITU-T Y.2015:
In recognizing the responsibility of the IETF with respect to IP
related matters, the draft Recommendation Y.2015 has been extensively
revised. The revisions have been made on the basis of input from
experts who participate in the IETF.
It should be noted, however, that Y.2015 is not solely concerned with
subjects under the jurisdiction of IETF, as it concerns IMS-based
systems which include network-based functionalities associated with the
architectures of 3rd Generation Mobile Services and other NGN
application service contexts.
The revisions made allow a number of different mapping possibilities,
which we believe accommodate a wide range of possible services and
solutions. The thrust of the document remains requirements oriented,
requirements which reflect the wishes of ITU-T members, including
network operators. We do not believe that Y.2015 conflicts in any way
with IETF work, and we would indeed appreciate any guidance on
solutions developed by the IETF that could be deployed to meet some or
all of the requirements specified therein for particular contexts of
interest to the IETF.
Accordingly, we attach a copy of Y.2015 which was approved by ITU-T
SG13 in its January 2009 meeting and look forward to your guidance on
how these requirements could be realized, in the context of your
2) Status of draft Recommendation ITU-T Y.FAid-loc-split:
With respect to Y.FAid-loc-split under development in Q.5/13,
("Functional Architecture of id-loc-split in NGN") we are not yet in a
position to provide any documentation as the process is still in its
very formative stages. The IAB-ITU-T-NGN Liaison for the IAB (Ms
Monique Morrow) offered some helpful suggestions as to how we might
proceed by identifying specific cases to be covered and proposed that a
subsequent gap analysis could be prepared. As soon as we have something
concrete available we will forward this for your consideration. In the
meantime any information you feel might be useful to us regarding
existing and/or emerging solutions would be welcome.
3) Status of draft Recommendation ITU-T Y.ipv6split:
Draft Recommendation ITU-T Y.ipv6split is being developed by Q7/13
which was former Q9/13 under last study periods in ITU-T.
For the last study period, SG13 has published 4 Recommendations which
were mainly focused on what requirements of IPv6 for the NGN are and
Q7/13 had sent LS to IETF three times on Aug. 2005(TD57Rev.1), Jan.
2006(TD111) and Jan. 2008(TD463Rev.1) respectively for letting you know
of our work in advance.
In this regards, Q7/13 would like to inform you that we decided to
develop a draft Recommendation titled Framework of ID/LOC separation in
IPv6-based NGN (Y.ipv6split) at its previous meeting in Sept., 2008.
The main scope of this draft Recommendation is entirely identifying the
requirement issues of ID/Locator separation from the NGN’s point of
view, rather than developing any specific IP protocol itself. So, we,
Q7/13, believe that there is not the overlapping with IETF activities.
Because its draft Recommendation is still in the beginning stage, we,
Q7/13, would like to send it later for your guidance on how this
requirement could be realized.
4) Collaboration between ITU-T SG13 and IETF
Since we are at the start of a new study period we would like to
solicit the help of the IETF, and enter into a period of continuous
collaboration with the IETF for the whole of this study period on this
subject based on our respective meetings and respective outputs as they
To enhance collaboration between ITU-T SG13 and IETF, SG13 agreed to
appoint Mr. Igor Faynberg (USA, Alcatel-Lucent) as a liaison rapporteur
Attachment: TD 23 (PLEN/13) (Recommendation ITU-T Y.2015)