Re: [IMRG] directing the discussion

[Olav.Kvittem at uninett.no]

nwnetworks at dial.pipex.com said:
> congestion; until the advent of wireless, 'everyone knew' that packet loss
> was due to congestion and not to CRC checks; I have looked periodically for
> papers to support this and do not see them; and is wireless quite different,
> if so by how much? 

Not exactly research, but here are some observations :
a characteristic of WLANs seem to be not packet loss but variable delay due
to retransmission. Layer 2 is restransmitting unicast. Multicast
is not retransmitted and we do see big loss rates.

In our MAN-WAN we have statistics showing a consistent high loss/retransmission 
rates in the order of 10s of percents and accordingly highly variable roundtrips times.

regards
  Olav



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