Iljitsch van Beijnum <[EMAIL PROTECTED]> writes: > I think there is some middle ground between 25000 and 10 ms.
10ms is the middle ground. That's enough for a bunch of retransmits on modern hardware. Coupled with aggressive FEC, that's more than enough time. > But the problem with sharing the airwaves is that you can't be > sure how long it's going to take to deliver packets. Actually, the speed of light is remarkably deterministic. If the network is so loaded that you can't send a packet in that period, you should drop so that all the TCPs back off. > The difference between first try @ 11 Mbps and having to retry > several times @ 1 Mbps can easily be a factor 40. None the less, it ends up being much lower by orders of magnitude than what the standards currently permit. The packet dumps I got from the 802.11b networks during the worst periods at IETF revealed what you would readily expect -- that TCP collapses badly when the underlying network does something very dumb. By the way, it would also be a good idea if the standard did proper power control of the mobile stations. -- Perry E. Metzger [EMAIL PROTECTED]
