Hi, Jaakko:

Contributions are there: D.354, MD-017, and MD-018.

These contributions explain why home/visiting/visited/target zone/GK/network address (Network point of attachment) is needed.

I am so sorry to see that you even failed to mention yesterday's email that I sent to Steve where again all benefits were mentioned (7+ points). Is that something missed by any chance?

You have pointed out some benefits of home domain in the contest of HLF. These HLF/VLF benefits are coming from the classical type of networking - primarily from the circuit-switched world. There are benefits are almost insginificant unless home/visiting/visited/target zone/GK/network address ainformation is stored in the HLF/VLF as appropriate. It is a NEW world known as packet-switching. Therefore, I do NOT thing people will be achieve the actual benefits unless HLF/VLF is populated with those additional information to manage mobility in the context of home/visited/target domain.

If people like to derive benefits of the new woprld, they new to have additional options (please just read the email that was sent by me to Steve. If you miss it, please let me know. I will send you a copy).

If someone like yourself do not see the benefits, you are free NOT to use those options. No one will force you to use it. If the users of a service provide like to have those OPTIONS why should it NOT given?

So, the people who DO NOT like to use those OPTIONs, we like to see why they are opposing it. So, it is their trun to write contributions why they actually oppose those concepts.

So, we would request to use those terms home as suggested (unless it is expalined in bring contributions why they oppose those terms).

Best regards, Radhika R. Roy AT&T

-----Original Message----- From: Jaakko Sundquist [SMTP:jaakko.sundquist@nokia.com] Sent: Tuesday, April 18, 2000 10:06 AM To: ITU-SG16@MAILBAG.INTEL.COM Subject: Re: 17 April Mobility Conf call notes

Hi Radhika & Laurent,

See my comments embedded...

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The contributions and explanations have been provided why "Home" is needed in the same context of "Home" domain.

The Home Administrative Domain came about because it seemed a good idea to bind the subscription of a User to some administrative entity (such as an operator). At the same time we have defined the HLF as the only place in which location information about the user can always be found (albeit clearer definitions about this information are still needed). Thus the domain containing the HLF of the user was in effect defined as the Home Administrative Domain of the user.

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If we do not accept the "home" for GK, zone and home network address, we have serious problems to accept the word "home" in any place of mobility whether it is "home" Adm domain.

I do not follow your reasoning above at all. Concidering a home GK or zone, I can understand that they may be needed if the service execution is done in the "home" of the user, i.e. all calls for a user would be controlled by the same GK, namely the home GK of the user. For service execution in the Visited Administrative Domain, I do not see any reason, why the concept of a home GK would be needed. Furthermore, if a concept is not definitely needed, I will not want to define it. I also feel we need to examine and define the "service execution in the home environment" or "virtual home environment" model better, so that everyone understands, what it is all about. As for the need for a home Network Point of Attachment, I am waiting for your contribution that clarifies, why we would need it.

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I have very a serious objection with your idea that the word home should not be used. If it is so, let us NOT use "home" anywhere in the document.

The point is that so far, if I understand Laurent correctly, neither he or I have accepted the concepts of home GK or home Network Point of Attachment. Those are the terms that we would not like to see in the picture.

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It is an OPTION to use "home". If anyone does NOT like it, they may NOT use it. Time and again, it has been shown why it is needed.

It will be very difficult to make any meaningful progress unless we are in consistent in defining term terms.

I like to see contributions explaining why "Home" should NOT be used.

I do not want to see contributions telling what terms SHOULD NOT be defined, I want to see contributions telling why some terms SHOULD be defined. So far I haven't seen such contributions on home NPoA and I'm still not sure about the home GK either.

-Jaakko