transparent tcp improvements

["Karl Jonas" <[e-mail]>]

Dear Experts,

I browsed through your mailing list archive, looked at a couple
of referenced docs, looking for the following solution to the
long-delay problem:

having a mobile device attached to a long-delay wireless link,
I would like to improve tcp's performance by sending early ACKs
from a box at the 'end' of the terrestrial network towards the
tcp sender in the terrestrial network:

mobile -- (long delay wireless link) -- tcp box -- (terrestrial nw) --
sender

The idea is that tcp's slow start / congestion avoidance mechanism
will handle the situation in the terrestrial nw correctly, and
transmission will not suffer from the long delay link.

The 'tcp box' must monitor tcp sesssions, generate acks towards the
sender (possibly drop acks from the mobile?), and of course buffer
tcp data that it has ack'ed to the sender, but which has not been
ack'ed by the mobile yet.

Since this is a very simple idea, I am sure that it has been
implemented and evaluated.

Please send me any reference to such an approach (I could not find one
yet).

Note that I am not interested in split-tcp, snoop, i-tcp or similar
approaches that are non-transparent to the sender/receiver, or that
need a modification on the mobile terminal side of the wireless link.


Thanks for your help (please reply (also) to my address [e-mail])


Karl


--
Prof. Dr. Karl Jonas            EMail: [e-mail]

University of Applied Science   FhG FOKUS CC SATCom
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