Re: New Version Notification for draft-koodli-ipv6-in-mobile-networks-02

[Rajeev Koodli <rkoodli@cisco.com>]

Hi Jouni,

>>> Does the on-demand IPv4 PDN management here imply establishing and tearing
>>> down IPv4 PDN connections based on the IPv4 use?
>> 
>> Not necessarily. This is typically based on session (PDN/PDP) timers on the
>> network side. 
> 
> We have seen mobiles trying to be too clever here as well (not for preserving
> IPv4 addresses but battery). However, the outcome will be more or less the
> same if the document encourages establishing and tearing down connections "in
> a clever way". 

The document is not proposing any cleaver ways. This is tied to PDN/PDP
session management. Whether we like it or not, session timers can clean up
state.


>> The MN does not have to do any signaling.
> 
> I am not concerned about MN doing IP layer signaling, that's peanuts. I am
> worried about the signaling caused by the MN playing around with the PDN
> connection that is then seen between core network nodes as signaling bursts.
> This is an issue especially with pre-LTE stuff, which seems to be the part
> that would actually get affected by recommendation of on-demand IPV4
> connection management.. Even if the draft targets for the LTE, majority of the
> networks will be mix of 3G and LTE for a long time. Some text explaining pros
> and cons/side effects would actually be all that is needed.

Could you explain the signaling bursts?

Agree on the comment about LTE and 3G coexistence.

>> 
>> As you know, Deferred Address Allocation is specified in 3GPP.
>> The above is an issue for Deferred Address Allocation procedure for split-UE
>> case in 3GPP. AFAIK, there has been no discussion of the split-UE case
>> addressing. Are you aware of anything, specifically how Deferred Address
>> Allocation would be used in split-UE case?
> 
> Not really.. that's why this document could/should actually make a clear
> distinction which of the recommended models/approaches apply where.

So, the issue here is really about getting some clarity on split-UE in 3GPP,
right? Currently, the document does not differentiate the cases, but I could
some text in the next version.

>> Separately, I wonder how prevalent is/will-be the UE-as-a-modem model..
> 
> As for data volumes that will probably be the dominant. Also, notebooks with
> cellular broadband access seem to be and become increasingly popular..

I would think that dongles, built-in laptop models would be more prevalent..

Thanks,

-Rajeev


> 
> - Jouni
> 
>> 
>>> 
>>> IMHO the draft should discuss side effects and constrains in more detail
>>> related to the on-demand IPv4 PDN connection and address management before
>>> suggesting them as a general guideline.
>> 
>> I would be glad to add more text, based on the WG discussion and consensus.
>> 
>> Before I do that, I would like to know whether there is interest in having
>> this as a WG document :-)
>> 
>> Regards,
>> 
>> -Rajeev
>> 
>> 
>> 
>>> 
>>> - Jouni
>>> 
>>> On Apr 16, 2010, at 1:04 AM, Rajeev Koodli wrote:
>>> 
>>>> 
>>>> Hello folks,
>>>> 
>>>> I was asked at the Anaheim meeting to clarify the intended audience for
>>>> this
>>>> ID, which I have done in the Introduction; this document can be a useful
>>>> reference for service providers and network designers.
>>>> This ID does not propose any new protocols or suggest any new protocol
>>>> work.
>>>> 
>>>> I also got a good review from Mohamed Boucadier (thanks!) which I have
>>>> addressed. 
>>>> 
>>>> It seemed there was good interest that this ID is useful.
>>>> 
>>>> So, Chairs: how do we proceed?
>>>> 
>>>> Thanks,
>>>> 
>>>> -Rajeev
>>>> 
>>>> http://tools.ietf.org/html/draft-koodli-ipv6-in-mobile-networks-02
>>>> 
>>>> 
>>>> 
>>>> ------ Forwarded Message
>>>> From: IETF I-D Submission Tool <idsubmission@ietf.org>
>>>> Date: Tue, 13 Apr 2010 16:30:59 -0700 (PDT)
>>>> To: Rajeev Koodli <rkoodli@cisco.com>
>>>> Subject: New Version Notification for
>>>> draft-koodli-ipv6-in-mobile-networks-02
>>>> 
>>>> 
>>>> A new version of I-D, draft-koodli-ipv6-in-mobile-networks-02.txt has been
>>>> successfully submitted by Rajeev Koodli and posted to the IETF repository.
>>>> 
>>>> Filename:  draft-koodli-ipv6-in-mobile-networks
>>>> Revision:  02
>>>> Title:   Mobile Networks Considerations for IPv6 Deployment
>>>> Creation_date:  2010-04-14
>>>> WG ID:   Independent Submission
>>>> Number_of_pages: 15
>>>> 
>>>> Abstract:
>>>> Mobile Internet access from smartphones and other mobile devices is
>>>> accelerating the exhaustion of IPv4 addresses.  IPv6 is widely seen
>>>> as crucial for the continued operation and growth of the Internet,
>>>> and in particular, it is critical in mobile networks.  This document
>>>> discusses the issues that arise when deploying IPv6 in mobile
>>>> networks.  Hence, this document can be a useful reference for service
>>>> providers and network designers.
>>>> 
>>>> 
>>>> 
>>>> The IETF Secretariat.
>>>> 
>>>> 
>>>> 
>>>> ------ End of Forwarded Message
>>>> 
>>>> 
>>> 
>> 
>