1. Study of performance of regular TCP in MANETs (using simulator).
Mobile Computing
Study of performance of regular TCP in MANETs (using simulator).
Presented by
Vishal Prajapati
Ajitav Sahoo
Balamurali A R
Date

2. ____________________________________
Agenda
Topics
Introduction Problem Statement Experimental Setup Results Conclusion

3. Introduction_____________________________
Emerging wireless ad hoc networks find their most important applications in mobile, multihop scenarios where there is no wired infrastructure.
MANET : A group of mobile devices communicating using their wireless radio in absence of any network infrastructure.
TCP is widely used over internet and is highly optimized for performance on wired networks.
Use of TCP/IP in MANET is a certainty because it provides seamless integration with fixed infrastructure.

4. Study of performance of regular TCP in MANETs
Project Definition________________________________
Study of performance of regular TCP in MANETs
(using simulator)
The performance of TCP in terms of following parameters was studied:
Variation of Throughput in wireless (Static MANET) and wired Network
Variation of Throughput with respect to mobility and its reaction to different Routing protocol.
Variation of Throughput and fairness with different flow channel.
Variation of Good put with respect to different TCP variant.
Variation of Throughput with respect to multiple hop count.
Variation of Throughput with respect to TCP window Size.

5. Expremental Setup_______________________________
We have made all over experiments in following scenario design
The scenario size = 3000 X 1500 m
The TCP variant = TCP Tahoe (Default)
Routing protocol = DSR
Noise factor = 0
Path loss = Free Space
Hop count and # of Nodes varying according to experiment requirement.
Distance between two nodes 300 to 350 m.

6. Variation of Throughput in wireless (Static MANET) and wired Network
Result – 1______________________________________
Variation of Throughput in wireless (Static MANET) and wired Network

7. Result – 2______________________________________
Variation of Throughput with respect to mobility and its reaction to different Routing protocol.

8. Variation of Throughput and fairness with different flow channel.
Result – 3______________________________________
Variation of Throughput and fairness with different flow channel.

9. Variation of Good put with respect to different TCP variant.
Result – 4______________________________________
Variation of Good put with respect to different TCP variant.

10. Variation of Throughput with respect to multiple hop count.
Result – 5______________________________________
Variation of Throughput with respect to multiple hop count.

11. Variation of Throughput with respect to TCP window Size.
Result – 6______________________________________
Variation of Throughput with respect to TCP window Size.

12. Conclusion_____________________________________
Due to high mobility, the predictability of TCP is not ensured in wireless.
TCP would react in the same manner as though it is a congestion related problem for packet loss.
In Multi-Hop topology , throughput is drastically reduced and keeps on reducing as the hop count increases.
Regular Variants of TCP are not able to solve the issue of throughput in MANET
TCP cannot guarantee a fair allocation of channel in case of multiple flows.