Analysis of Quality of Service in Wimax networks

4.2.1 Results for video traffic over Best Effort Service Flow 
Figure 26 shows the variation of throughput for video traffic over BE service 
flow. As the number of nodes increases the throughput steadily increases. The sample 
video streams at 64kbps. The throughput for one node is very close to 64 kbps. For 10 
nodes the throughput is observed to be 576kbps

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Throughput
0
100
200
300
400
500
600
700
1
2
3
4
5
10
Num ber of Nodes
kb
p
s
 
Figure 26 Throughput with number of nodes for BE service flows 
Figure 27 shows the variation of packet loss as the number of nodes streaming 
video over BE service flow increases. As the number of packets being transmitted goes 
up with increase number of nodes generating the traffic, the packet loss percentage goes 
up as well. 
Service Flow Type: Best Effort (BE)
Traffic Type: Video 
Video Parameters:64kbps H.263 

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PacketLoss
0
1
2
3
4
5
6
7
1
2
3
4
5
10
Num ber of Nodes
%
 
Figure 27 Packet Loss with number of nodes for BE service flows 
Average Jitter
0
0.001
0.002
0.003
0.004
0.005
0.006
1
2
3
4
5
10
Number of Nodes
seco
n
d
s
 
Figure 28 Average Jitter with number of nodes for BE service flows 
Service Flow Type: Best Effort (BE)
Traffic Type: Video 
Video Parameters:64kbps H.263 
Service Flow Type: Best Effort (BE)
Traffic Type: Video 
Video Parameters:64kbps H.263 

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Figure 28 shows the variation of average jitter for BE service flow. The average 
jitter increases as the number of nodes increase. The value of jitter is very low at for a 
single node and increases as the number of nodes with streaming video traffic increases. 
Average Delay
0
0.0005
0.001
0.0015
0.002
0.0025
0.003
1
2
3
4
5
10