[Iccrg] Meeting agenda

Wesley Eddy weddy at grc.nasa.gov
Thu Sep 14 19:59:12 BST 2006


On Sat, Sep 09, 2006 at 11:07:15AM -0700, Lachlan Andrew wrote:
> 
> A crude approach would be to respond to a loss rate  X  and corruption
> rate  Y  the same way as to  X ((X + 2Y) / (X+Y))  loss with no
> corruption.  For  X << Y  (an uncongested lossy link), this gives
> "loss" rate 2X and hence high potential throughput, but deferring to
> those with less loss.  If  X >> Y (a congested link) it gives  "loss"
> rate X+Y, treating corruption as loss.
> 
> This can be implemented by a lookup table, the same way as HS-TCP is.

In CETEN, we acheived something similar to this by varying the
multiplicative decrease factor between 1/2 and 1, as a function of the
ratio of the corruption loss rate to the total loss rate:

http://www.icir.org/mallman/papers/ceten-ccr-oct2004.ps
http://www.icir.org/mallman/papers/eten-comnet.ps

The idea behind CETEN was to get around the thorny issue of determining
whether particular losses are due to congestion or corruption and to
utilize only a network-provided estimate for the probability of a
corruption loss.

-- 
Wesley M. Eddy
Verizon Federal Network Systems



More information about the Iccrg mailing list