Subject: RE: [Mip4] Call origination

From: "Arunkumar Sivaraman" <[email-masked]>
Date: Fri, 21 Jul 2006 12:04:04 +0530

Pete,

  Thanks for your response.

My question below:

> Network System: CDMA 2000
> 
> Scenario 1: MN in home network, powers on.
> 
> Doubts:
> 
>    1. Does the MN get an ip address through normal IPCP procedures or
>       through MIP RRQ with NAi extension to the HA.
>    2. What parameter sent by the MN makes the PDSN/HA send an agent
>       advertisement with 'H' bit set.
>    3. Does (2) happen,at all, when MN is in home network?
>    4. Protocol call flow in this scenario.

Call setup for cdma2000 links is described in 3GPP2 publication
X.S0011, which is TIA-835.  You can find a copy here:

http://www.3gpp2.org/Public_html/specs/X.S0011-002-D_v1.0_060301.pdf

To use Mobile IP, the MN does not negotiate an address with
IPCP and instead leaves out the IP address configuration option
entirely.  The MN subsequently gets an agent advertisement
and registers via the PDSN.  The MN sets the home agent and
home address fields to zero, and includes the NAI extension
along with a Challenge-response extension.

[ARUN]:  When you say the PDSN sends the agent advt, does it set the 'F'
& 'R' bit. Going by your answer for the second question it looks like,
the PDSN(acting as FA) will always force the mobile to register with it
even when the MN is in its home network.

1. Is there a possible scenario in cdma 2000 networks, when the PDSN
sends an agent advt with 'h' bit on (can the PDSN respond on behalf of
the HA with the 'h' bit set agent advt. If yes, what parameter sent by
the MN makes the PDSN take this decision). 
2. Or is this possibility only when the HA is co-located with the PDSN
functionality. 

================================================================

> Scenario 2: MN, having active call, hands off to a foreign network,
for 
> the first time.
> 
>  
> 
> Doubts:
> 
>    1. Can the mobile in this scenario move into the foreign network
with
>       a ZERO HA address value?
>    2. If (1) ain't possible, other than static provisioning is there
any
>       other way for the mobile to acquire a HA address, while it is
>       active in its home n/w?
>    3. Is the MN-FA authentication values provisioned in MN, or can
they
>       be constructed on the fly?
In a cdma2000 network the MN is never "at home" so the above scenario
doesn't happen.

[ARUN]: This is like the condition of the MN "always being away from
home" but why is this done in cdma 2000 n/w(s).

regards,
 
Arunkumar Sivaraman,
Airvana India Pvt. Ltd.,
Ph: +91-80-41348788.
 
"Work is something I do between weekends."

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