#FIG 3.1 Landscape Center Inches 1200 2 2 4 0 6 -1 7 0 0 -1 0.000 0 0 7 0 0 5 12300 9450 12300 150 225 150 225 9450 12300 9450 2 2 0 6 -1 7 0 0 -1 0.000 0 0 -1 0 0 5 1050 2100 2625 2100 2625 3300 1050 3300 1050 2100 2 2 0 6 -1 7 0 0 -1 0.000 0 0 -1 0 0 5 6975 2100 8550 2100 8550 3300 6975 3300 6975 2100 2 2 0 6 -1 7 0 0 -1 0.000 0 0 -1 0 0 5 4050 2100 5625 2100 5625 3300 4050 3300 4050 2100 2 1 1 6 -1 7 0 0 -1 14.000 0 0 -1 1 0 2 1 0 6.00 360.00 720.00 2625 2700 3975 2700 2 1 1 6 -1 7 0 0 -1 14.000 0 0 -1 1 0 2 1 0 6.00 360.00 720.00 5700 2700 6975 2700 4 0 -1 0 0 16 20 0.0000 4 255 4110 7950 9225 BRIMS:Promise of the Internet\001 4 0 -1 0 0 16 20 0.0000 4 315 1830 525 9300 May 29, 1997\001 4 0 -1 0 0 16 18 0.0000 4 210 5850 975 825 The Classic Sender-Channel-Receiver Picture:\001 4 0 -1 0 0 16 18 0.0000 4 210 900 1350 2850 Source\001 4 0 -1 0 0 16 18 0.0000 4 210 1005 4275 2850 Channel\001 4 0 -1 0 0 16 18 0.0000 4 210 540 7350 2850 Sink\001 4 0 -1 0 0 16 18 0.0000 4 270 4320 1050 4575 How is signal on channel modified?\001 4 0 -1 0 0 16 18 0.0000 4 270 1980 1050 5235 i) by attenuation\001 4 0 -1 0 0 16 18 0.0000 4 270 2310 1050 5565 ii) by interference (\001 4 0 -1 0 0 16 18 0.0000 4 270 5055 3225 5250 (transfer function depends on frequency)\001 4 0 -1 0 0 16 18 0.0000 4 270 7710 3375 5625 random changes introduces to signal by adding in some signal)\001 4 0 -1 0 0 16 18 0.0000 4 270 2490 1050 4905 1. In analog network\001 4 0 -1 0 0 16 18 0.0000 4 210 1575 1125 6150 2. In Internet\001 4 0 -1 0 0 16 18 0.0000 4 270 2010 1125 6480 i) by packet loss\001 4 0 -1 0 0 16 18 0.0000 4 270 210 1125 6810 ii)\001 4 0 -1 0 0 16 18 0.0000 4 270 4905 3225 6450 caused by queue overload (congestion)\001 4 0 -1 0 0 16 18 0.0000 4 270 7320 1425 6825 by packet delay caused by bursts of our, and other sources\001 4 0 -1 0 0 16 18 0.0000 4 270 8055 1125 7950 How can we modify coding scheme to look like analog signal, and\001 4 0 -1 0 0 16 18 0.0000 4 270 5625 1125 8280 queueing scheme to look like analog channel?\001 4 0 -1 0 0 16 18 0.0000 4 270 7545 1125 8940 How can we modify routing to look like graceful degradation?\001