Next Generation Transition (ngtrans)

Jonne.Soininen | 1 May 2002 21:43

RE: I-D ACTION:draft-soininen-ngtrans-3gpp-cases-00.txt

Hi Pekka,

thank you for you comments. Some answers/comments bellow:

> -----Original Message-----
> From: ext Pekka Savola [mailto:pekkas <at> netcore.fi]
> 
> 
> > A URL for this Internet-Draft is:
> > 
http://www.ietf.org/internet-drafts/draft-soininen-ngtrans-3gpp-cases-00.txt

A few comments:

Abstract  

   This document describes different scenarios in Third Generation
   Partnership Project (3GPP) defined packet network, i.e. General 
   Packet Radio Service (GPRS) [...]

==> If you only consider GPRS, why name the document '3GPP Networks'?

JSo: GPRS is the name of the packet switched side of the 3GPP System. Thus, the only part of the 3GPP System
that is really applicable in this context. (The 'other part' would be cirquit switched domain of 3GPP, but
that does not seem relevant.)

==> It is not absolutely clear to me why UMTS would not require some 
transitional mechanisms too (e.g. IPv6 -> IPv4).  However, I don't know 
the architecture well enough to really comment on it.

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Pekka Savola | 2 May 2002 08:11

Re: RE: I-D ACTION:draft-soininen-ngtrans-3gpp-cases-00.txt

On Wed, 1 May 2002 Jonne.Soininen <at> nokia.com wrote:
> ==> If you only consider GPRS, why name the document '3GPP Networks'?
> 
> JSo: GPRS is the name of the packet switched side of the 3GPP System.
> Thus, the only part of the 3GPP System that is really applicable in this
> context. (The 'other part' would be cirquit switched domain of 3GPP, but
> that does not seem relevant.)

Ok.  People associate the name 'GPRS' with something else, though..

> ==> you're making assumptions how GPRS network would be built?  Would it
> be possible that GPRS network would be v4-only (except for GGSN), but UE's
> IPv6-only?  Again, this might just be my lack of knowledge on 3GPP 
> networks.
> 
> JSo: It was tried not to make assumptions. However, rather just document
> what the possibilitites are. Now that I read the wording again, it might
> not be very clear: In this scenario, the UE and the GGSN are the only
> IPv6 capable equipment in the network. (GGSN is the default router for
> the UE, and thus, the first node in the network that the UE sees.)
> Everything else is IPv4.

GGSN being the default router ie. the first-hop router, certainly 
clarifies this scenario.

--

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords

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