Nt1310 Unit 5 Simulation Report

Satisfactory Essays
VI. SIMULATION EXPERIMENTS AND RESULTS In this section we explain our simulation framework for assessing the performance of our proposed QoS-based CR-WMSNs routing protocol. Afterwards we describe different simulation results representing the efficiency of the proposed QoS-based MAC protocol. A. Simulation Framework Our CR-WMSNs simulator has been developed based on OPNET [31]. Before discussing to the simulation results, we would like to have a glimpse of the assumptions and major parameters: 1) OPNET simulator[31] is used to generate 100 sensor nodes for a CR-WMSNs. Initially, the connectivity of the CR-WMSNs is kept as 0.7. The capacity of the network links is assumed to be Poisson distribution with mean 100 kbps. Every sensor is assumed to…show more content…
The video streaming traffic is considered to have 176 × 144 pixel resolution and an average Exponential inter-arrival with 10 frames/sec as specified with H.264 [32]. The non-real-time (NRT) and Best Effort (BE) data traffic are assumed to be long range Pareto distribution with heavy tails. The total size of files for NRT and BE data traffic are taken same as the overall size for video traffic. 3) The classification of traffic is performed based on the ToS field of IP packets. γ is kept proportional to the IP-ToS. The up scaling factor γup and down scaling factor γdown are considered as follows: (a) γup = 20 and γdown = 20 for video streaming (b) γup = 20p2 and γdown = 10p2 for NRT traffic and (c) γup = 40 and γdown = 10 for BE traffic. The active time for video streaming traffic and NRT traffic are taken as 4 and 2 times of the active time for BE traffic. 4) In our simulation CWmin and CWmax are taken to be 64 and 128 for BE traffic respectively, which corresponds to Prlower f = 0.05 and Prupper f = 0.40. We have set the corresponding values for the video streaming traffic to be 25% of the BE
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