Subject: RE: phone device

From: <[email-masked]>
Date: Sat, 8 Nov 2003 00:52:13 +0200

Hi, itojun!

I try to clarify this a little bit:

- 3GPP2 CDMA2000 standards currently support Simple IPv4, Mobile IPv4 and Simple IPv6 modes. Both Mobile IPv4 and Simple IPv4 modes are currently deployed in commercial networks. Mobile IPv6 mode will (most probably) be specified by the end of 2004, so commercial deployments are expected (probably) in ~2005. There is a PPP link between a 3GPP2 mobile and its "default router" PDSN (Packet Data Serving Node); all modes can in theory be (simultaneously) run on that PPP link. So IPv4 mode can be used when communicating with v4 peer nodes, and IPv6 mode can be used when communicating with IPv6 peer nodes (of course, depending on network support). If the network only supports IPv4 (which is the case today), IPv6-in-IPv4 tunneling (e.g. ISATAP) in the mobile is one alternative.

- 3GPP networks support both IPv4 and IPv6 by supporting IPv4 and IPv6 type of PDP contexts, starting from 3GPP Rel99 networks. IPv4 is deployed in current GPRS networks and IPv6 deployment is coming in the networks. I'm not making any advertisements, but this is an example of a 3GPP phone that supports both IPv6 and IPv4 types of PDP contexts http://www.nokia.com/nokia/0,,47550,00.html . A good basic principle is to use IPv4 PDP contexts when talking to IPv4 peer nodes and IPv6 PDP contexts when talking to IPv6 peer nodes. So that environment is a dual stack environment.  For further information, see RFC 3314, RFC 3574 and draft-ietf-v6ops-3gpp-analysis-07.txt

- What comes to *IMS specifications*, 3GPP Release 5 (/ Release 6) IMS is a SIP-based  *IPv6-only network domain* and its transition scenarios are analysed in RFC3574 / draft-ietf-v6ops-3gpp-analysis-07.txt  / IMS scenario 1&2. In the IMS case, communications with (external) IPv4(-only) SIP nodes need a translator solution.

Did that clarify or cause more confusion?

BR,
	-Juha W.-

-----Original Message-----
From: [email-masked] [mailto:[email-masked]]On
Behalf Of ext [email-masked]
Sent: 08 November, 2003 00:07
To: [email-masked]
Subject: phone device

	i have been told that 3GPP/3GPP2 network will be IPv6 only, and we need
	twists to support connection from 3GPP/3GPP2 handset to IPv4 server
	(such as yahoo).  http://press.nokia.com/PR/200311/923684_5.html
	introduces CDMA phone with dual-stack support.  i'm wondering what is
	the difference in 3GPP/3GPP2 statement i saw in the mailing list,
	and the nokia phone.

itojun