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084f2db8c6 For flows of size bigger than 5, the first 5 packets are colored in red, and the remaining packets are colored in blue: Figure 3: Packets from long flows. At the bottleneck link (link between node 1 and node 2), a differentiated dropping scheme is employed. Figure 5 shows packets generated from the two sessions, after some packets are dropped: Figure 5: Red packets are generated faster than blue packets. here. On the contrary, in the session from node 4 to node 6, only 4 packets are transmitted in each flow. This is achieved by: $ns duplex-link $n(1) $n(2) 700Kb 25ms RED/myRIO $ns duplex-link-op $n(1) $n(2) orient right Queue/RED/myRIO set gentle true Queue/RED/myRIO set thresh 1 Queue/RED/myRIO set maxthresh 15 Queue/RED/myRIO set weight 10 Queue/RED/myRIO set setbit false set redq [[$ns link $n(1) $n(2)] queue] $redq set qweight [expr 1.0/2] $redq set linterm [expr 4.0] $ns queue-limit $n(1) $n(0) 30 Notice that to obtain a more drastic effect of size-aware differentiation, we choose a relatively high ratio between long and short flow packet dropping rate (weight is set to 10). Proc. ns-2. an illustrative scenario. BU CS Technical Report TR-2002-09.
When congestion happens, low priority packets are dropped at a faster rate (on average 10 times faster) than that for high priority packets. That is the basic scheme of our size-aware scheduling. Therefore, all flows in this session are long according to our definition. 403 Forbidden.. Once the count exceeds a certain threshold (in this case 5), the remaining packets from the corresponding flow are identified as long flow packets. Differentiated Control of Web Traffic: A Numerical Analysis. GM:sigmetrics02.