ARQ Protocols

1. ARQ Protocols Prof. Anish Goel

2. Automatic Repeat Request (ARQ) 2 ARQ Protocols Anish Goel

3. Stop-and-Wait ARQ 3 ARQ Protocols Anish Goel

4. S&W ARQ - Sequence Numbers 4 ARQ Protocols Anish Goel

5. S&W ARQ - Sequence Numbers in ACK 5 ARQ Protocols Anish Goel

6. 1-Bit Sequence Numbering suffices for Stop-and-Wait ARQ 6 ARQ Protocols Anish Goel

7. Stop-and-Wait ARQ 7 ARQ Protocols Anish Goel

8. Applications of Stop-and-Wait ARQ 8 ARQ Protocols Anish Goel

9. Stop-and-Wait Efficiency 9 ARQ Protocols Anish Goel

10. Stop-and-Wait Model 10 ARQ Protocols Anish Goel

11. Stop & Wait Efficiency on Error-free channel 11 ARQ Protocols Anish Goel

12. Example: Impact of Delay-Bandwidth Product on Transmission Efficiency 12 ARQ Protocols Anish Goel

13. Stop and Wait Efficiency in Channel with Errors 13 ARQ Protocols Anish Goel

14. Example: Impact of Bit Error Rate on Transmission Efficiency 14 ARQ Protocols Anish Goel

15. Go-Back-N (GBN) 15 ARQ Protocols Anish Goel

16. Go-Back-N ARQ 16 ARQ Protocols Anish Goel

17. S&W timeout and GBN window size long enough to cover round trip time 17 ARQ Protocols Anish Goel

18. Go-Back-N with Timeout 18 ARQ Protocols Anish Goel

19. Go-Back-N Transmitter & Receiver 19 ARQ Protocols Anish Goel

20. Sliding Window Operation 20 ARQ Protocols Anish Goel

21. Maximum Allowable Window Size is Ws = 2m-1 21 ARQ Protocols Anish Goel

22. ACK Piggybacking in Bidirectional GBN 22 ARQ Protocols Anish Goel

23. Required Timeout & Window Size for Bidirectional GBN 23 ARQ Protocols Anish Goel

24. Applications of Go-Back-N ARQ 24 ARQ Protocols Anish Goel

25. Required Window Size for Delay-Bandwidth 25 ARQ Protocols Anish Goel

26. Efficiency of Go-Back-N 26 ARQ Protocols Anish Goel

27. Example: Impact of Bit Error Rate on GBN 27 ARQ Protocols Anish Goel

28. Selective Repeat ARQ 28 ARQ Protocols Anish Goel

29. Selective Repeat ARQ 29 ARQ Protocols Anish Goel

30. Selective Repeat ARQ 30 ARQ Protocols Anish Goel

31. Send & Receive Windows 31 ARQ Protocols Anish Goel

32. What size Ws and Wr allowed? 32 ARQ Protocols Anish Goel

33. Ws + Wr = 2m is maximum allowed 33 ARQ Protocols Anish Goel

34. Why Ws + Wr = 2m works 34 ARQ Protocols Anish Goel

35. Applications of Selective Repeat ARQ 35 ARQ Protocols Anish Goel

36. Efficiency of Selective Repeat 36 ARQ Protocols Anish Goel

37. Example: Impact of Bit Error Rate on Selective Repeat 37 ARQ Protocols Anish Goel

38. Comparison of ARQ Efficiencies 38 ARQ Protocols Anish Goel

39. ARQ Efficiencies 39 ARQ Protocols Anish Goel