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Re: [RRG] Why delaying initial packets matters
Regarding mobility support of a reactive mapping system: It would
work
for local mobility within an edge network. But not for global
mobility.
Could you expand on this? Assuming a pull system something along
the lines
of what I described to Robin, why wouldn't it work for global
mobility?
David,
I should have been more specific, and maybe we are even on the same
page.
It is possible to use the indirection between edge and transit addresses
as a tool for global mobility support, but alone it is insufficient.
Three
more components are needed:
(1) Localized mobility support within an edge network, because the
address
indirection alone tracks host mobility only at the granularity
of edge
networks, not access links.
(2) Dynamic and per-host mappings between edge and transit addresses,
because the mapping for a single edge address changes when a
mobile
host moves to another edge network
(3) Trust relationships between edge networks so that a mobile host's
mapping can be changed by (or based on information of) a visited
edge
network
Item (1) could be realized through, e.g., Hierarchical Mobile IPv6 or
Proxy
Mobile IPv6. Item (2) could be realized through pull systems for
mapping
resolution. Push systems would likely create an unsuitably high
amount of
state as well as signaling and processing overhead if they were to
provide
the required fine-granularity and dynamism.
I analyzed the feasibility of mobility support through address
indirection
also in my paper on Six/One Router [1], section 3.5. The analysis
considers
mobility support through address indirection in general where
possible, and
looks at Six/One Router specifically only where necessary.
[1] http://users.piuha.net/chvogt/pub/2008/vogt-2008-six-one-router.pdf
- Christian
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