Analysis of Quality of Service in Wimax networks

Number of nodes
seco
n
d
s
 
Figure 32 Average Jitter with number of nodes for rtPS service flows 
Average Delay
0.0037
0.0038
0.0039
0.004
0.0041
0.0042
0.0043
0.0044
0.0045
0.0046
0.0047
0.0048
1
2
3
4
5
10
Num ber of nodes
se
co
n
d
s
 
Figure 33 Average Delay with number of nodes for rtPS service flows 
Service Flow Type: Real Time Polling Service (rtPS) 
Traffic Type: Video 
Video Parameters:64kbps H.263 
Service Flow Type: Real Time Polling Service (rtPS) 
Traffic Type: Video 
Video Parameters:64kbps H.263 

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61
Figure 32 shows the variation of average jitter for rtPS service flow. The average 
jitter increases as the number of nodes increase. Figure 33 shows variation of average 
delay for rtPS service flow. 
4.2.3 Results for video traffic over Unsolicited Grant Service Flow 
The following section presents results obtained during the UGS service flow 
analysis. 
Throughput
0
100
200
300
400
500
600
700
1
2
3
4
5
10
Num ber of nodes
kb
p
s
 
Figure 34 Throughput with number of nodes for UGS service flows 
Service Flow Type: Unsolicited Grant Service (UGS)
Traffic Type: Video 
Video Parameters:64kbps H.263 

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62
Figure 34 shows the variation of throughput for UGS service flow, as the number 
of nodes increases. Similar to earlier cases, the throughput steadily increases as the 
number of nodes increase. 
PacketLoss
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
1
2
3
4
5
10