Hi, Paul:

I am glad to hear from you.

I do not think that we can decide among ourselves only (e.g., Ad Hoc H.323 Mobility Group).

It is a bigger issue than H.323 Annex H, and few very few people understand what is going on. It affects the life of the entire ITU-T for all questions of all SGs.

I am writing contributions probably for the SG16 plenary session to discus all issues related to each question especially that WP 2 handles. Let me provide some insights here:

WP2 has questions for H.320, H.324, H.321, H.323, and others. Each question has its own architectural functional entities. For example, H.323 has its terminals, GKs/BEs, GWs, MCUs. etc. Similarly, each question has its own entities.

Each application also needs to support mobility, QOS, billing, directory, security/authentication, accounting, etc.

Now the challenge is that if the support of mobility, QOS, billing, directory, etc. are protocol specific (e.g., H.323, H.320, H.321), then these extensions belong to the respective protocols. For example, the mobility support of the H.323 terminals, GKs, BEs, and GWs that needs the extension of H.323 protocol (i.e., H.323 base spec,H.225.0 [RAS, Q.931, Annex G], H.245) rightly belongs to Q.13/16. Similar is the case with other applications (e.g., H.3230, H.324, H.321, IMT-2000 applications).

Please note carefully: we are now adding some value-added functional entities for mobility like VLF, HLF, AuF, etc. But protocols for these need not to be the application (protocol) specific. That is, the communications between the VLF <-> HLF, HLF <-> AuF, etc. can be independent of any application protocols (e.g., H.323, H.320, H.324, H.321, IMT-2000, etc.). These are common protocols that can be developed independent of H.323, H.320, H.324, or H.321 protocol. In other words, all applications can use the same set of common protocols for VLF, HLF, and AuF communications. In this respect, we made an attempt to use IMT-2000's VLF, HLF, and AuF related protocols for the same purpose (I guess that you had been one of the lead persons for that liaison activity).

In otherworlds, we wanted to avoid to develop separate VLF, HLF, and AuF protocols for each application, that is, one VLF/HLF/Auf protocol for H.323, another VLF/HLF/AuF protocol for IMT-2000, and so on. This has been the duplication of the same thing and creating a nightmare for interoperability. More importantly, it defeats the very purpose for developing of "common standards" for which the ITU is so much dedicated.

The same example is not only true for mobility, this is also true for QOS, billing, directory, security/authentication, accounting.

I have the same problem with the QOS for which Q.13/16 is working in H.323 Annex N.

My company (AT&T) is working for almost for all SGs, and is participating in almost in all standard bodies. We are using all of those standards for providing services worldwide. So, the biggest problem that I have is to analyze what all those activities mean when services are provided combining all those standards together. I cannot just sit idle and let things go "wild" creating a mess when it comes to provides services including all applications and services. AT&T's networks not only support fixed H.323, H.320, and other services, we also support mobile applications (wireless, wire-line).

It is a very serious matter from my company point of view. Had it been a trivial matter, I would not raise the alarm like this. It has very serious consequences for the entire ITU as well. I cannot just let this go like a loose canon. We need to shape the event for the common benefit of all. It is not that only the Ad Hoc mobility group of H.323 Annex H. It is the future of the 21st century standard works and process that are in stake.

My earnest desire is to write contributions to explain all those things so that all delegates throughout the world can analyze what is at stake. New ideas are needed to face the challenge of the future standard works.

I am glad that I have the opportunity to work in H.323 Annex H to visualize the greater problems. Now it is time to shape it to meet the future challenge although I know that it is not easy, but let me give a try: To show what belongs to where and how the extensions need to be done, not only for Annex H (mobility), but also for Annex N (QOS), accounting, security, and others.

In the end, I like to count on the support of the people like yourself!

In the meantime, if you have any suggestions, please send via emails so that all of us of SG16 folks throughout the world can participate in exchanging views.

Best regards, Radhika R. Roy AT&T rrroy@att.com +1 732 420 1580

-----Original Message----- From: Reddy, Paul K [mailto:paul.k.reddy@intel.com] Sent: Thursday, September 07, 2000 1:21 PM To: Roy, Radhika R, ALCOO; ITU-SG16@mailbag.cps.intel.com Subject: RE: H.323 Mobility: Enterprise vs. Mobile Carrier - Mandate of Q. 13/1 6

Hi Radhika,

We as ITU-T SG16 Q13/Q14 group agreed on the H.323 Annex H Terms of Reference, which includes scope of H.323 Annex H. Now, you are proposing a different scope for H.323 Annex H on this reflector.

I propose that we plan to have H.323 Mobility Adhoc group conference call discussion on your proposal instead of exchanging emails on this open reflector and come to some consensus on your proposal and then take a contribution to SG16 Q13/Q14 Rapporteurs meeting in Geneva. We as H.323 Mobility Adhoc group choose Mr. Markku Korpi as Chairman of the Adhoc group, I request Mr. Korpi to setup a conference call to discuss your proposal.

I am willing to sponsor the Conference Call Bridge, I propose that we can have conference call on Monday September 11, 2000 from 7:00 AM to 9:00 AM (Pacific Standard Time). Please let me know your availability all other members who wants to participate, so that I can make the Conference call bridge arrangements.

regards, Paul

Paul K. Reddy Intel Corporation Office Phone# +1 (503)-264-9896 Mobile Phone# +1 (503)-807-9564 Email: paul.k.reddy@intel.com

-----Original Message----- From: Roy, Radhika R, ALCOO [mailto:rrroy@att.com] Sent: Thursday, September 07, 2000 7:38 AM To: ITU-SG16@mailbag.cps.intel.com Subject: Re: H.323 Mobility: Enterprise vs. Mobile Carrier - Mandate of Q. 13/1 6

Hi, Everyone (including all Rapporteurs and WP2 Chairman):

Again, it speaks for itself as it has been mentioned earlier.

As if, few folks want to create their own charter, push the boundaries of each question so that they are the ONLY people who can decide what need to be addressed in each question no matter what happens to other questions in a given WP or SG or across the whole ITU-T.

They are the people who are afraid of seeing the BIG picture of the ITU-T how one question relates to others to achieve a very narrow goal. Some of these people even participated in the joint meeting of SG16 and SG11 to see how SG11 is addressing the HLF, VLF, AuF, etc. for mobility so that no duplicate work is done elsewhere. Now they are turning their back. Why?

Is the norm of the ITU process?

It appears that some people do not need address any technical points, as if, they create their own mandate.

It may create a good discussion in the upcoming SG16 meeting in the plenary and general session.

Again, the proposal for H.323 Annex H has been repeated as follows:

1. First, finish the extension of the existing H.323 base specs, and H.225.0 (RAS, Q.931, Annex G)to support mobility among the H.323 entities: Terminals, GKs, BEs, and GWs. (see the contributions that are being made so far).

2. Second, develop a clear mandate whether the backend protocols like VLF <-> HLF, VLF <-> AuF, HLF <-> AuF, etc. are the charter of Q.13/16 only, or these protocols need to be worked with other SGs. (see the contributions that are being made so far).

3. Third, any protocols that re being used between VLF <-> HLF, VLF <-> AuF, HLF <-> AuF, etc. MUST not be termed as H.225.0 Annex G or its extension because these are separate protocols and serve completely different purposes although may useful properties (e.g., hopcount, etc.) of the Annex G protocol can be used for these protocols.

Let us focus on the charter and mandate of Q.13/16: This is item 1 only.

Hope that the WP2 Chairman will have time to review the whole thing with true satisfaction in the light of all questions of all SGs within the ITU.

Best regards, Radhika R. Roy AT&T rrroy@att.com +1 732 420 1580

-----Original Message----- From: Jaakko Sundquist [mailto:jaakko.sundquist@nokia.com] Sent: Thursday, September 07, 2000 5:11 AM To: ITU-SG16@MAILBAG.INTEL.COM Subject: Re: H.323 Mobility: Enterprise vs. Mobile Carrier - Mandate of Q. 13/1 6

I guess you mean that you agree with all 4 points, not just the fourth point, right (i.e. I guess there's a typo)?

-Jaakko

p.s. I didn't want to send this to the list...

-----Original Message----- From: EXT Reddy, Paul K [mailto:paul.k.reddy@INTEL.COM] Sent: 07. September 2000 1:41 To: ITU-SG16@mailbag.cps.intel.com Subject: Re: H.323 Mobility: Enterprise vs. Mobile Carrier - Mandate of Q. 13/1 6

Hi Everyone,

I agree with Mr. Jaakko Sundquist, Editor of H.323 Annex H, who made 4 point in this email.

regards, Paul Reddy Editor of H.246 Annex E.1, Annex E.2

Paul K. Reddy Roaming Services Capability Manager Mobile Data Services Area of Opportunity Applications and Services Lab Intel's Architecture Labs Intel Corporation Office Phone# +1 (503)-264-9896 Mobile Phone# +1 (503)-807-9564 Email: paul.k.reddy@intel.com

-----Original Message----- From: Roy, Radhika R, ALCOO [mailto:rrroy@ATT.COM] Sent: Wednesday, September 06, 2000 9:33 AM To: ITU-SG16@MAILBAG.INTEL.COM Subject: Re: H.323 Mobility: Enterprise vs. Mobile Carrier - Mandate of Q. 13/1 6

Hi, Everyone (including all Rapporteurs and WP 2 Chairman):

Again, it is interesting to see how a very narrow view can create serious problems not only for a simple Annex, but also for the whole question, for the whole study group, and for all other study groups of the ITU-T.

Time and again, it has been said that let us work within the mandate of Q.13/16 first and contributions had been made to clarify those points. Everything has been ignored just because few folks want to do something almost working like a close group without seeing the BIG picture of all questions of all SGs of the ITU-T. In fact, some joint meetings were also initiated between SG16 and SG11 to see how the HLFs, VLFs, and AuFs related protocols are being addressed elsewhere.

Still, they are pushing the same thing just because few folks brought some contributions. Objections were put via contributions, emails, and verbal discussions. Even there is not a single editorial note in the document related to those things.

A simple example will reveal the fact. We have discussed that there are serious problems to use GRQ messages to discover the GKs in mobile environment. Many contributions, emails, and verbal explanations have been provided. If you look into the present H.323 Annex H write-up, you will see that, as if, GRQ is the "Nirvana" for discovering the GK in mobile environment. Not a single word has been used even as an editorial note whether some members have raised the questions that there are problems need to be addressed for GRQs. The way the GRQ section has been written, it is a generic one and is nothing do with mobility. Rather, it suits to be added in the base H.323 spec. Many more examples can be given for each technical issue.

This Annex has NOT done its first important task how to extend the H.323 signaling messages (RAS, Q.931, Annex G) to solve the mobility problems for the H.323 entities (Terminals, GKs, BEs, GWs). In fact, it is the mandate of Q.13/16. Contributions are there, but everything has been ignored.

Rather, Annex H has focused in some areas for which it has NOT got the mandate: Communications between VLFs <-> HLFs, VLFs <-> AuFs, HLF <-> AuFs, etc. These work items are not the charter of Q.13./16 alone. These are the areas for the joint work with all other questions of all SGs that deal with mobility. (In another example, even if H.320, H.321, or H.324 wants to be used by mobile users, they can also use HLFs, VLFs, AuFs, etc. Similarly, all other mobile applications of all other SGs can also use these HLFs, VLFs, AuFs, etc. Take the case of AuF, it can also be used by the fixed user. There is nothing fency about this.)

(More importantly, these additional entities have raised serious concerns: How does a GK/BE play a role in the overall process while "wild" suggestions have been made to use the Annex G protocol as well? It has created a "dangerous" mechanism to "by-pass" the very need of GKs/BEs. In fact, some members have boasted that they even do not see any need to go via GKs or BEs anymore so far mobility is concerned. As if, a "bomb " is about to be placed to break the very foundation of H.323 in the name of extending of H.323 for mobility.)

More can be written for each technical issue, if needed. If one likes to see some of those points, please see the contributions that were submitted in the last Q.13/16 Portland meeting.

Again, I am repeating the proposal for H.323 Annex H:

1. First, finish the extension of the existing H.323 base

specs, and H.225.0 (RAS, Q.931, Annex G)to support mobility among the H.323 entities: Terminals, GKs, BEs, and GWs. (see the contributions that are being made so far).

2. Second, develop a clear mandate whether the backend

protocols like VLF <-> HLF, VLF <-> AuF, HLF <-> AuF, etc. are the charter of Q.13/16 only, or these protocols need to be worked with other SGs. (see the contributions that are being made so far).

3. Third, any protocols that re being used between VLF <->

HLF, VLF <-> AuF, HLF <-> AuF, etc. MUST not be termed as H.225.0 Annex G or its extension because these are separate protocols and serve completely different purposes although may useful properties (e.g., hopcount, etc.) of the Annex G protocol can be used for these protocols.

It is very important to note that only item 1 is within the charter of Q.13/16 (H.323). All other items need to be addressed in the light of all mobility works of all questions of all SGs of the ITU by the working party chair and others.

(My personal view is this: Let H.323 Annex H be scoped for item 1 only for now as a first step. It will also take a good amount of time to finish it. People are waiting to see that this happens first.

To include other items, it may take a long time to have stable texts working with all SGs. This will then constitue the second step.)

Best regards, Radhika R. Roy AT&T

-----Original Message----- From: Jaakko Sundquist [mailto:jaakko.sundquist@NOKIA.COM] Sent: Wednesday, September 06, 2000 8:08 AM To: ITU-SG16@MAILBAG.INTEL.COM Subject: Re: H.323 Mobility: Enterprise vs. Mobile Carrier - Mandate of Q. 13/1 6

Mr. Roy & other parties interested in H.323 Annex H,

I found your posting addressing such general level issues that I think it is better to write a whole new mail as a response instead of responding to your claims and comments point by point...

First of all you question the mandate of Annex H and its relation to the H.323 protocols. I find it very odd that you, without any real arguments to support for it, restrict the H.323 recommendations and thus also Annex H to handle ONLY the H.323 entities that have been defined prior to Annex H. The first real work that we got done for Annex H was to identify the functionalities that were (are) needed for Mobility Management and that were missing from H.323. This is how we (in an ad hoc meeting in Red Bank, in which you yourself was also present) came up with the four new H.323 (functional) entities: HLF, VLF, AuF and IWF. Thus we have defined NEW H.323 entities that were NOT present prior to Annex H. If it is illegal for us to define new H.323 entities (as you seem to claim), I can't see how the Border Element ever got defined, since it was not defined prior to the H.225 Annex G.

Second, you seem to have defined the HLF, VLF and AuF as back-end services. This is NOT how I see them. I see back-end services as services that are NOT defined in the H.323 series recommendations, but that may be used by gatekeepers. In other words, back-end services or the functionalities they provide do NOT have any real definition in H.323, nor is it illegal to define new entities to H.323 that provide same kind of functionalities that could be achieved by using some back-end service. The back-end services that are used in some implementations of the H.323 system can undoubtedly be used for similar purposes as the new functional entities of Annex H are, but this does not make the new entities back-end services. Furthermore, the whole point (or mandate) of Annex H is to make recommendations that allow for different manufacturer's equipment to be used in different parts of the (mobility enhanced) H.323 system and still allow the users/terminals to move around in the network. Thus, in my opinion, it is one of the most important issues of Annex H to define, how the HLF, VLF and AuF communicate with each other. By just stating that they are back-end services we would in essence NOT define this, since back-end services are NOT defined in H.323.

Third, the protocol(s) that are used between the HLF, VLF and AuF are still and open issue. The reason, why the H.225 Annex G protocol is used in the present draft is that it is the only protocol that has been seriously mentioned for this purpose. (Not only by the editor, but in various contributions as well, although the editor takes full responsibility of the current text in the draft.) It has been identified that the H.225 Annex H protocol already has the functionality for locating a User with a certain aliasAddress. Really roughly said, this functionality is "half" of the functionality that is needed for Mobility Management, the other half being the location updating procedures (which are not really addressed by the protocol yet). This is why the protocol is being considered for the Annex H usage. However, I would really like to see contributions suggesting other (preferably existing) protocols as well. Intel's contribution APC-1902, was the first one of this kind. These contributions should, however, state clearly how the suggested protocols should be used, if there is any ambiguity. I.e. just stating: "Use Mobile IP" is not enough (I'm not trying to refer to the APC-1902 with this comment), but information flows for the needed Mobility Management procedures should be presented (these include at least the location updating procedures, call establishment procedures, call termination procedures and unregistration procedures).

Fourth, the needed enhancements of the RAS, Q.931, etc. protocols will be provided by finishing the information flows on chapter 10. I admit that not much of this has yet been done, but on the other hand, at least so far I have found that there is not too much that has to be done with respect to these protocols. (There will probably be certain message fields that will be mandatory for Mobile Terminals that are optional in H.323 normally, etc., but I don't see a need for too many new message fields or messages.)

Last, but not least, we a really in a hurry, if we want to get the Annex H determined in November. This is why I suggest that the interested parties provide the contributions describing the usage of other protocols as the Mobility Management protocols of Annex H as soon as possible. Also it would be very nice, if these contributions were made modeling the chapter 10 of the current draft, so that incorporating them to the annex would be as fast as possible.

I'm still a bit in the middle of the process of digesting the information I have gotten about the Annex H work in Portland, but I'll try to send a mail summarizing (what I think is) our current situation later this week (probably on Friday). I will also make a "cleaner" version of the TD-42a as the "starting point" for our interim work before Geneva (this new draft will not contain any other than editorial changes compared to TD-42a).

---

Jaakko Sundquist * +358 50 3598281 * Audere est Facere! jaakko.sundquist@nokia.com *

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