RE: [mobile-ip] Re: hmip and mobile routers

["Hesham Soliman (ERA)" <Hesham.Soliman@era.ericsson.se>]

        I think we agree that the two drafts are solving two different
        scenarios for the same problem.


> This question is addressed in my draft "Mobile Networks Support in
> Mobile" IPv6
> 
>(http://search.ietf.org/internet-drafts/draft-ernst-mobileip-v6-network-01.txt).
>    
> 
> In this draft, the mobility of the network is completely transparent to
> all nodes located in the mobile network.     Following your instance,
> the train is a mobile network and the gateway between the train and the
> Internet is a mobile router.    The Mobile Router obtains a new care-of
> address at each new point of attachment to the Internet.    There are
> basically 2 kinds of nodes in this mobile network:  permanently fixed
> ones (TV screens, sensors, on-board computers, seats, ...) and mobile
> ones.    Mobile ones may be composed of those belonging to the train
> (the ticket-collector ?), and some entering and leaving the train
> (Passengers, PDAs, Mobile Phones).
> 
> In this proposal, Passengers get a care-of address when they enter the
> train (obvious), but they don't need to acquire a new care-of address
> every time the train is reachable from a new care-of address.     IP
> mobility of the network is therefore hidden to them.
> 
> I do see a benefit for Passengers to operate HMIP.   In this case, the
> MAP would be located in the Mobile Router.
> 
        => The benefit is receiving route optimised packets. Having 
        said that, not every device on earth will have a MIP implementation
        so as I said earlier, this is valid fo devices that are fixed. 
        However for MNs other optimisations in HMIPv6 are proposed.



> I agree with Mickael that the HMIP draft does not elaborate much about
> this special case, but I must also advocate that it is not the object of
> the HMIP draft to discuss about it.   As I see it, the HMIP draft only
> outline one instance where HMIP could be used: mobile nodes visiting a
> mobile network and I agree with this.   
> 
        => We do support both for "HMIP MNs or routers". 

        Regards,
        Hesham