Re: [multimob] MLD HLD Message

Hi Alvaro,

 Just to clarify that 3GPP also uses DSMIP6 which is a "MIPv6 with IPv4
support". I agree that it is better to focus first on solutions for
MIPv6 and PMIPv6. These solutions could be extended later.

Best Regards

Desire

> -----Original Message-----
> From: multimob-bounces@ietf.org 
> [mailto:multimob-bounces@ietf.org] On Behalf Of 
> multimob-request@ietf.org
> Sent: May 16, 2008 9:08 AM
> To: multimob@ietf.org
> Subject: multimob Digest, Vol 13, Issue 4
> 
> Hi,
>  
> Just some comments: I read the draft about multicast and 
> HMIPv6 and I have a doubt about if HMIPv6 is a succcesful 
> technology or not.
>  
> I am not a Mobile IP expert, but from what I know:
>  
> 1. 3GPP2 (USA) uses Mobile IP but not HMIPv6 2. 3GPP (Europe) 
> uses something similar to Proxy Mobile IP draft and still 
> doesn't support Mobile IP 3. IMS (IP Multimedia Subsytem) is 
> expecting the Proxy Mobile IPv6 draft to reach RFC status. 
> This technology is considered "critical" for IMS. IMS is 
> based on IPv6 but I think it still doesn't support Mobile IP 
> ( I am not sure about this) Both 3GPP and 3GPP2 are going to 
> implement IMS
>  
> Of course, Mobile IP can be used not only in Mobile Phones. 
> It can be used with WIFI, Wimax or other wireless 
> technologies. But I think it's better one solution for 
> muticast Mobile IP that could be also used with 3GPP, 3GPP2 and IMS.
>  
> So, my doubts are
>  
> is HMIPv6 a successful technology?
> is it really being implemented by ISP?
>  
> Best regards
> 
> Alvaro
>  
> 
> ________________________________
> 
> De: multimob-bounces@ietf.org en nombre de Hitoshi Asaeda 
> Enviado el: jue 15/05/2008 19:16
> Para: sarikaya@ieee.org; behcetsarikaya@yahoo.com
> CC: multimob@ietf.org
> Asunto: Re: [multimob] MLD HLD Message
> 
> 
> 
> >   We had a discussion on where MLD/IGMP Hold message needs to be 
> > specified. There are two options: either it is specified in 
> MLD/IGMP 
> > Mobile draft or in individual protocol extension draft(s) for 
> > HMIP/MIP, etc.
> >
> >   Please post your opinions.
> 
> Maybe I should clarify.
> 
> I sent a mail to the multimob ML on Apr.14.
> 
> Thomas proposed MLD hold message in;
> http://tools.ietf.org/html/draft-schmidt-waehlisch-mhmipv6
> 
> It assumes the use of MLD hold message with HMIP6.
> On the other hand, MLD hold message might be useful for fast 
> handover scenario in general, because MLD hold asks to the 
> upstream mrouter or proxy (i.e. MAPs or HA) to keep join 
> state during MN's movement and recover the multicast session 
> after MN's movement.
> 
> On the other hand, one may think that MLD hold state is not 
> mandatory as the general MLD extension, because the fast 
> handover would be much faster than the time of membership 
> expiration maintained by MLD. This means even if MN does not 
> send any MLD message to his upstream router or proxy, he can 
> recover the multicast session quickly since he can move to 
> the new mobile network very fast (i.e. faster than MLD 
> expiration time).
> I don't know if it's always true or not.
> 
> So now, I'd like to hear your opinions.
> If MLD hold is useful especially (or only) for HMIP, then MLD 
> hold specification would be kept in the above HMIP draft.
> If it is useful to propose it as the MLD extension as the 
> general function, I'm happy to work for defining the 
> specification in the MLD extension draft with Thomas.
> 
> Thank you for your input.
> --
> Hitoshi Asaeda
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> multimob@ietf.org
> https://www.ietf.org/mailman/listinfo/multimob
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