The currently accepted best formula for TCP performance as a function
of packet loss is given in the following paper:
Padhye, J., Firoiu, V., Towsley, D., and Kurose, J., Modeling TCP
Throughput: a Simple Model and its Empirical Validation, UMASS
CMPSCI Tech Report TR98-008, Feb. 1998.
The URL is:
ftp://gaia.cs.umass.edu/pub/Padhye-Firoiu98:TCP-throughput.ps.Z
You can find a compilation of other papers on the subject on the TCP
Friendly website:
http://www.psc.edu/networking/tcp_friendly.html
You will need to do the same calculation Fred showed to convert BER to
packet loss rates. I think you will find that BER at 1E-8 is the
highest acceptable, and for fast links you might find 1E-12 to be
desirable.
--Jamshid
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