AODV is a reactive routing protocol where it is based on distance vector. It uses the destination number to determine the freshness of routes. AODV minimizes the broadcasts by creating routes on-demand. Due to on-demand manner in AODV, AODV won't check the route in the periodic interval. It just checks the route whenever it has any request to the destination path. Link failure can happen if the node or destination nodes move to the other random position with a random speed. It is important to get an optimum speed interval so that the node cannot move too fast or too slow in the network and cause a link failure to the destination.

1. An Evaluation of
MANET Performance
Using AODV By
Varying Mobility Speed
and Pause Time

2. 2
Assalamualaikum !
Name : Nurul Hidayah Binti Ibrahim
Course : Bachelor of Science Computer
(Computer Network Security) with Honors
Matric Number : BTBL16044069
Supervisor : Dr. Nor Aida Binti Mahiddin

3. ‘’
Contents
1. Objective
2. Problem Statement
3. Mobility Model
4. AODV Overview
5. Performance Evaluation Metrics
6. Code & Implementation
7. Result
8. Conclusion
3

4. 1.
OBJECTIVE
4

5. OBJECTIVE
▣ To study the AODV routing protocol in MANET
▣ To simulate AODV routing protocol in
OMNet++
▣ To evaluate the difference of node mobility
and pause time in AODV
5

6. 2.
PROBLEM
STATEMENT
6

7. PROBLEM STATEMENT
▣ Due to on demand manner in AODV , AODV
won’t check route in periodic interval .
▣ Link failure cause the node need to
rebroadcast the RREQ to get a new route to
the destination .
7

8. 3.
MOBILITY
MODEL
• TYPES OF
MOBILITY
MODEL
• RANDOM
WAY-POINT
(RWP)
8

9. MOBILITY MODEL
9
TYPES OF
MOBILITY MODEL
Random
Temporal
Dependency
Spatial
Dependency
Geographic
Constraint

10. RWP MODEL
▣ One of Random
model
▣ Movement of
RWP model is
shown below
10

11. RWP MODEL (CONT..)
11
Choose random
destination
point
Choose random
speed within
[0,Vmax]
Move to
destination
point
Reach
destination
point
Pause

12. 4.
AODV
OVERVIEW
• AODV MESSAGE
• AODV ROUTE
DISCOVERY
• AODV ROUTE
MAINTENANCE
12

13. 13
AODV MESSAGE
1. HELLO
2. RREQ
3. RREP
4. RRER

14. 14

15. 15
AODV ROUTE DISCOVERY

16. AODV ROUTE DISCOVERY (CONT..)
16
SN check route
entry
No information of
DN
Broadcast RREQ
Create Reverse
Path
IN/DN receive
RREQ
IN check route
entry
No information of
DN
IN broadcast
RREQ
Repeat
broadcast until IN
have information
of DN
Or DN receive
RREQ
IN/DN reply
RREP in unicast
using the reverse
path
SN send packets
to DN

17. 17
AODV ROUTE MAINTENANCE

18. AODV ROUTE MAINTENANCE (CONT..)
18
SN re-establish new route
RERR relayed until reach SN
Upstream node broadcast RERR to other neighbors
Upstream node notice the breakage
Link breakage due the nodes is out of transmission range

19. 5.
PERFORMANCE
EVALUATION
METRICS
• PERFORMANCE
METRICS
• SIMULATION
PARAMETER
19

20. PERFORMANCE METRICS
20
Packet
Delay
Throughput
Packet
Delivery
Ratio (PDR)

21. SIMULATION PARAMETER
21
Parameter Specification
Simulation Area 1000x1000
Transmission Range 250m
Number of Nodes 60
Simulation Time Limit 900s
Speed
VSM (1m/s) , SM (5m/s) ,
MFM (20m/s) , FM (40M/S)
Pause Time 0,10,20,30,40,50

22. 6.
CODE &
IMPLEMENTATION
• VERY SLOW
MOBILITY (VSM)
• SLOW MOBILITY
(SM)
• MODERATE FAST
MOBILITY (MFM)
• FAST MOBILITY
(FM)
22

23. CODE
*.host[*].wlan[*].radio.transmissionRange = 250m
sim-time-limit = 900s
**.host[*].mobility.speed = uniform (0mps, 1mps) //VSM
**.host[*].mobility.speed = uniform (0mps, 5mps) //SM
**.host[*].mobility.speed = uniform (0mps, 20mps) //MFM
**.host[*].mobility.speed = uniform (0mps, 40mps) //FM
23

24. IMPLEMENTATION
24

25. 7.
RESULT
• THROUGHPUT
• PACKET DELAY
• PACKET
DELIVERY RATIO
(PDR)
25

26. 26
THROUGHPUT
The ratio of total number of received
packets with duration of simulation
time

27. 27

28. 28
PACKET DELAY
An average of time taken for the packet
sent to the destination node from the
source node.

29. 29

30. 30
PDR
The ratio between the total number
of received packets and the total
number of sent packets

31. 31

32. 8.
CONCLUSION
32

33. 33
CONCLUSION
▣ VSM has the best performance
despite of having long pause
time
▣ FM is better with long pause
time as the nodes are
travelling in high speed
▣ So that it can minimize the
link breakage

34. 34
Thanks!
References
1. Moudni, H., Er-rouidi, M., Mouncif, H., & El Hadadi, B.
(2016, May). Performance analysis of AODV routing
protocol in MANET under the influence of routing
attacks. In 2016 International Conference on Electrical
and Information Technologies (ICEIT) (pp. 536-542).
IEEE.
2.Dwivedi, P., & Gupta, S. (2016). A Survey on Route
Maintenance and Attacks in AODV Routing
Protocol. International Journal of Computer
Applications Germany, 133(9), 23-24.
3.Nayak, P., & Vathasavai, B. (2016). Impact of random
mobility models for reactive routing protocols over
MANET. International Journal of Simulation--
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4.Rajasekar, S., & Subramani, A. (2016). A review on
routing protocols for mobile Adhoc
5.Asma Ahmed, A. Hanan, & Izzeldi Osman. (2015,
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10(2).