[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [RRG] Scaling, Mobility & 228 mapping changes a second
Jumping in...
On 27 feb 2008, at 12:54, Robin Whittle wrote:
So I think that as long as the radio networks provide the same
care-of address, I am not convinced any "Mobile IP" techniques are
needed to provide the care-of address addresses the MN needs for
this Ivip approach to global mobility.
The point that mobility can be solved regionally by simply tunneling
to a "stability provider" is a good one. Especially if you consider
that you'll do frequent handovers from various cheap and fast fixed
networks to lower and more expensive mobile networks within a region.
(I.e., walking out the door, getting coffee in a coffee shop, that
could be your home network, 3G, coffee shop network.) Obviously this
only works if all these networks have decent interconnection within
the region. This is probably true for regions in the order of 1000 km.
However, when in your story you arrived in Heathrow my long-term
scepticism of network layer mobility came back in full force. Why
would you need to retain the same address after flying to the opposite
end of the globe? You can't realistically expect sessions to stay up
throughout the trip, and obviously the trip takes more than long
enough to allow for updating even rather slow mapping services. This
means that you could just as easily update your DNS record to point to
your regionally-mobile address in England when you land.
So intra-regional mobility could be done using tunneling, extra-
regional mobility is unnecessary, the DNS can handle it.
Now let's see what the other messages about mobility have to say...
--
to unsubscribe send a message to rrg-request@psg.com with the
word 'unsubscribe' in a single line as the message text body.
archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg