1. TFAS-NS2 Trace File Analyzer for Ad Hoc Routing Protocols Simulation with NS2
Speaker
Dr. Saloua CHETTIBI
Lecturer at University of Jijel
Reasercher at MISC Laboratory, University of Contantine 2
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2. Ntic’15 Outlines Mobile Ad hoc Networks & Routing
Evaluation of ad hoc Routing Protocols performance
NS-2 Simulation Process
TFAS-NS2 : a Tool for the post-simulation phase
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3. I. Mobile Ad hoc Networks & Routing
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4. Ntic’15 Routing: Important
16/05/2018
Routing: Important
Routing Protocol
Topological information
Routing Algo
Physical and data link layer
(Wi-Fi, Bluetooth, Zigbee)
Network Layer
IP Protocol
Transport Layer
TCP UDP
Application and Middleware
Routing: Forwarding Data Trafic on a Network Topology
Layered Model of Wireless Ad hoc Net.
,Conti and Giordano, 2013.
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5. Routing: Difficult task!
Decentralized architecture
Frequent topology changes
Limited Bandwidth
Limited Energy ressources
Adaptivity
Robustness
Efficiency
Scalability
NS2
Quantifying routing protocols performance is commonly done by extensive simulation
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6. II. Evaluation of Routing Protocols performance
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7. Performance Evaluation : Important!
Routing policy proposal
Performance Evaluation
Interpretation and conclusions
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8. Performance Study: Methodology
One would like to study the performance of one or several routing protocols
under different conditions of :
Nodes mobility
Network density
Data traffic
Maximum velocity
Number of nodes
Number of connections
Pause time
Network scale
Packet sent rate
To obtain one result per metric for a given scenario, simulation should be
repeated several times with random generated mobility scripts.
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9. III. NS-2 Simulation Process
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10. Ntic’15 Simulation Process : NS-2
Simulation Process. T. Issariyakul and E. Hossain , 2009.

11. Simulation: configuration script
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12. Post Simulation: File with .nam extension
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13. Ntic’15 Post Simulation: File with .tr extension
Records timed events concerning both nodes and packets.
Relevant information for network performance analysis should be extracted from trace file with .tr extension.
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14. Extracting performance measures: AWK Scripts
Scripts for measuring performance metrics should be written.
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15. Extracting performance measures: AWK Scripts
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16. Extracting performance measures: Statistics & Graphics
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17. Ntic’15 What is the problem? This procedure is both complex and slow:
Users need to write AWK scripts.
Users need to learn/use several languages and tools.
Exporting results from one tool to another is hard and time consuming.
What Students generally do?
Only two or three metrics are implemented …
For statistics: only the mean is presented.
Partial study…
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18. Performance Evaluation : Important!
Routing policy proposal
Performance Evaluation
Interpretation and conclusions
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19. IV. TFAS-NS2: a Tool for the post-simulation phase!
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20. Ntic’15 FTAS-NS2 solution
Facilitate and speed-up the task of performance measures extraction:
Users do not need to write AWK scripts.
Users do not need to learn/use several languages and tools.
No results exporting from one tool to another...
What Students must do?
By using NS2 conjointly with STFA-NS2 tool, Ad hoc routing protocols designers have only to concentrate on the interpretation of the obtained results.
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21. TFAS-NS2: Implemented Performance Metrics
Packet Delivery Ratio (PDR)
Packet Loss Ratio (PLR)
Average end to end Delay (AD)
Average Jitter (AJ)
Normalized Routing Overhead (NRO)
Activity Concentration (AC)
Standard Deviation of Consumed Energy among all nodes (SDCE):
Minimal Residual Energy Ratio (MRER)
Active Nodes Number (ANN)
Average of Residual Energies (ARE)
Network LifeTime (NLT): time until K% of network nodes exhaust all their batteries. Note that K is a variable parameter fixed by the user(eg. time to first node energy depletion).
…….We can define composite metrics (eg. Energy efficiency)
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22. Ntic’15 TFAS-NS2: Statistical Measures and Graphics
For each metric, the following statistical measures are calculated:
Mean
First, second and third quartiles (Q1, Q2 et Q3)
Standard deviation
Confidence interval of the mean
Three types of graphics are generated by STFA-NS2:
Line graphs with or without confidence intervals
Histograms with or without confidence intervals
Box-plots.
Also, statistics can be saved as text files.
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23. TFAS-NS2: First Interface
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24. TFAS-NS2: Second Interface
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28. TFAS-NS2: Now
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29. TFAS-NS2: Perspectives
More Mobility Models
Statictical Tests
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30. Thanks!
Any question?
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