[e2e] ECN vs. source quench
David P. Reed
dpreed at reed.com
Fri Apr 23 19:34:38 PDT 2004
At 08:18 PM 4/23/2004, Black_David at emc.com wrote:
>ECN for UDP - really?? How is it reflected back to the source
>and what does the source do with it?
Protocols implemented on top of UDP can make use of ECN information to do
their own (presumably "tcp compatible") congestion control, using whatever
control loops they implement on top of UDP.
For example, a "digital fountain" can rate-control its transmission source
to back off when congestion is encountered, even though "digital fountains"
As I said, ECN is an IP layer function and has nothing to do with TCP in
particular - all it does is tell the endpoint about impending congestion
conditions the IP datagram encountered as it traversed the routers along
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