1. How bad TCP suffers from packet losses and delays over wireless ad hoc network May Zin Oo, Mazliza Othman Faculty of Computer Science & Information Technology University of Malaya Malaysia 3rd to 5th April

3. Applying TCP (Transport Layer Protocol) to Ad hoc network

4. TCP Variants for Ad hoc network

5. Ad hoc routing protocols

6. Simulation Methodology

7. Experimental results from simulations

9. The wireless devices can communicate each other without using central access points in peer-to-peer fashion , but these are within range of each other.

10. Decentralized wireless network

12. To provide flow control, congestion control & avoidance, in-order and reliable end-to-end delivery of data packet in the wired networks.

13. Applying TCP to ad hoc environment,

14. TCP has to face many problems such as packet losses due to congestion and node mobility, wireless high bit errors, and so on.

15. Because of these problems, the following TCP versions were intended for wireless environment:

17. Slow start,

18. Use at the beginning of a transfer or after timeout

19. Start from minimum window size

20. Increase window size exponentially

21. Congestion avoidance,

22. Increase congestion window size by MSS/cwnd bytes for each ACK received.

23. Increase window size linearly

24. In our simulation, I will analysis the following TCP variants.

25. NewReno

26. Vegas

28. Ad Hoc Routing Protocols

29. Ad Hoc Routing Protocols

32. We have analyzed

33. Packet loss rates (%)

34. Data transfer rate

36. Packet loss rate (%) measurement of AODV Figure 3 Figure 4

37. Packet loss rate (%) measurement of DSR Figure 5 Figure 6

39. Comparison of data transfer rate in mobile environment Figure 9 Figure 10

41. This is because DSDV maintains all possible routes to the destination.

43. Vegas over DSDV and AODV routing in both environment and