Re: pmipv4 of WiMAX forum (Re: [Mip4]Questionaboutdraft-leung-mip4-proxy-mode)

[Jun AWANO <[e-mail]>]

Hi Tsuda-san,

O.K. Tsuda-san.
I think I couldn't pick up all of differences.
But I try to enumerate them.

The differences are as following.

1. Terminologies
  draft-leung-mip4-proxy-mode says
  LMA,MAG,PRRQ,PRRP.
  But WiMAX spec doesn't use such terminologies.
  Just, HA, FA & PMIP Client, RRQ, RRP,respectively.

2. New extensions
  draft-leung-mip4-proxy-mode defines new MIPv4 extensions,
  Proxy Mobile IPv4 Mode Extension and PMIPv4 Per-Node
  Authentication Method Extension. And enfocing to use them.
  But WiMAX spec doesn't support them.

3. New error codes
  draft-leung-mip4-proxy-mode defines new error codes,
  PMIP_UNSUPPORTED and PMIP_DISALLOWED.
  But WiMAX spec doesn't use them.

4. How to use Registration Revocation
  When a MN moves to a new MAG.
  Registration Revocation message is sent to the
  previous MAG according to draft-leung-mip4-proxy-mode.
  I'm not sure it's different or not.
  But at least WiMAX spec doesn't say explicitly that
  a LMA(HA) uses Registration Revocation in this case.

5. Processing Proxy Registration Request
  Whole sentence described at "8.1.  Processing Proxy
  Registration Requests" is different from WiMAX spec.
  A HA specified in WiMAX performs as per RFC3344.
  So the HA doesn't perform like described at "8.1.".
  i.e. The HA doen't use Sequence Number and doesn't
  send error RRP like described at "8.1.".

6. Moving to a New MAG
  I think draft-leung-mip4-proxy-mode assumes that
  the MAG which sends RRQ on behalf of a MN is relocated
  when the MN has moved to a new MAG.
  But In WiMAX spec, PMIP client which sends RRQ on behalf
  of a MN is anchored even when the MN has moved to a new FA.
  Are you following the proceeding of netlmm WG?
  And do you know Ajoy's PMIPv6 draft?
  http://tools.ietf.org/wg/netlmm/draft-singh-netlmm-protocol-03.txt
  The MAG described in the draft is anchored while moving.
  The PMIP client specified in WiMAX is similar to it.
  So, WiMAX PMIP client isn't required to transfer any MN's
  contexts(e.g. MN-HA key) when the MN has moved.

Best Regard,
Jun


Yoshi Tsuda (yotsuda) wrote:
> Hi Awano-san,
> 
>  What do you think the major technical differences between current
>  Kent's draft and the current WiMAX spec?
>  You know, most people in this MIP4 mailinglist doesn't have enough
>  time to check the specific WiMAX spec.  So, we would appreciate,
>  if you point out the MIPv4-related technical differences instead of
> just
>  saying different.
>  
> Thanks in advance.
> -Yoshi
> 
>> -----Original Message-----
>> From: Kent Leung (kleung) 
>> Sent: Friday, July 27, 2007 9:31 AM
>> To: Jun AWANO; mip4
>> Subject: RE: pmipv4 of WiMAX forum (Re: 
>> [Mip4]Questionaboutdraft-leung-mip4-proxy-mode)
>>
>> Let me clarify that we will be updating our draft, 
>> draft-leung-mip4-proxy-mode, accordingly to address the gaps.
>>
>> Kent 
>>
>> -----Original Message-----
>> From: Kent Leung (kleung)
>> Sent: Friday, July 27, 2007 9:29 AM
>> To: Jun AWANO; mip4
>> Subject: RE: pmipv4 of WiMAX forum (Re: [Mip4]
>> Questionaboutdraft-leung-mip4-proxy-mode)
>>
>> Hi Jun.
>>
>> We are working with WiMAX Forum members to address the 
>> technical gaps in the draft.  Currently, we are collecting 
>> the review comments and will update the draft accordingly.
>>
>> Kent 
>>
>> -----Original Message-----
>> From: Jun AWANO [mailto:[e-mail]]
>> Sent: Thursday, July 26, 2007 7:23 PM
>> To: mip4
>> Subject: pmipv4 of WiMAX forum (Re: [Mip4] Question
>> aboutdraft-leung-mip4-proxy-mode)
>>
>> Hi, kent
>>
>> Please let me ask about your draft.
>>
>> Your draft says,
>> "This document describes WiMAX Forum and 3GPP2 solution  for 
>> the base Proxy Mobile IPv4 function which enables  another 
>> entity to provide mobility support on behalf of  an unaltered 
>> and mobility-unaware IPv4 device."
>>
>> But, I think that the PMIPv4 described in your draft seems 
>> different from the one specified in WiMAX Forum spec (WiMAX 
>> Forum Network Architechture stage2/3).
>>
>> Do you plan to change the PMIPv4 spec of WiMAX Forum to match 
>> your draft?
>>
>> Best Regards,
>> Jun
>>
>>
>> --
>> Mip4 mailing list: [e-mail]
>>     Web interface: https://www1.ietf.org/mailman/listinfo/mip4
>>      Charter page: http://www.ietf.org/html.charters/mip4-charter.html
>> Supplemental site: http://www.mip4.org/
>>
> 
> 


-- 
-----------------------------------------------
Jun AWANO <[e-mail]>
NEC System Platforms Research Laboratories
Tel:[phone], FAX:[phone]


-- 
Mip4 mailing list: [e-mail]
    Web interface: https://www1.ietf.org/mailman/listinfo/mip4
     Charter page: http://www.ietf.org/html.charters/mip4-charter.html
Supplemental site: http://www.mip4.org/