[e2e] Is the end to end paradigm appropriate for congestion control?
emmanuel.lochin at isae.fr
Wed Nov 13 04:58:19 PST 2013
On 13/11/2013 12:18, Detlef Bosau wrote:
> Nevertheless, depending on the MAC scheme, in some cases no more than
> one packet may reside on the line. (On ring systems, of course, there
> may be several tokens/frames in flight.)
> However. As long as a receiver cannot accept the data, putting it on the
> line does not make any sense. (As in TCP: Flow control dominates
> congestion control.) More drastically spoken: The line capacity is of
> secondary interest, the primary interest is the next hop's capacity.
> Wouldn't it make sense to - at least experimental - consider a
> concatenated hop by hop flow control system?
> What would be the major problems in such a design?
Such idea has already been proposed at the IETF'73 see
and I found the meeting minutes here:
It seems that this might introduce problem for secure communications in
particular when using IPSec.
> Am 12.11.2013 23:44, schrieb Richard Bennett:
>> The arithmetic on the size of bits on a network is pretty interesting.
>> At 1 Mpbs, a bit is 300m long, at 1 Gbps it's .3m, etc. So those old
>> ring systems never had more than one token circulating at a time, but
>> I saw 100 presentations that showed several in the network at the same
>> On 11/11/2013 11:19 PM, Jon Crowcroft wrote:
>>> and of course, any LAN tech has to start receiveing bits before you
>>> finish sending them.... (unless you choose the cambridge ring model
>>> with 16 bit minipackets - a precursor to atm)
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