This document discusses different types of Automatic Repeat Request (ARQ) protocols. It covers stop-and-wait ARQ, go-back-N ARQ, and selective repeat ARQ. For each protocol, it describes the basic mechanism, window sizes, efficiency, and examples of how error rates affect efficiency. It also provides a comparison of the efficiencies of the different ARQ protocols.

1. ARQ ProtocolsProf. Anish Goel

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

3. Stop-and-Wait ARQ3 ARQ Protocols Anish Goel

4. S&W ARQ - Sequence Numbers4 ARQ Protocols Anish Goel

5. S&W ARQ - Sequence Numbers in ACK5 ARQ Protocols Anish Goel

6. 1-Bit Sequence Numbering suffices for Stop-and-Wait ARQ6 ARQ Protocols Anish Goel

7. Stop-and-Wait ARQ7 ARQ Protocols Anish Goel

8. Applications of Stop-and-Wait ARQ8 ARQ Protocols Anish Goel

9. Stop-and-Wait Efficiency9 ARQ Protocols Anish Goel

10. Stop-and-Wait Model10 ARQ Protocols Anish Goel

11. Stop & Wait Efficiency on Error-free channel11 ARQ Protocols Anish Goel

12. Example: Impact of Delay-Bandwidth Product on Transmission Efficiency12 ARQ Protocols Anish Goel

13. Stop and Wait Efficiency in Channel with Errors13 ARQ Protocols Anish Goel

14. Example: Impact of Bit Error Rate on Transmission Efficiency14 ARQ Protocols Anish Goel

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

16. Go-Back-N ARQ16 ARQ Protocols Anish Goel

17. S&W timeout and GBN window size long enough to cover round trip time17 ARQ Protocols Anish Goel

18. Go-Back-N with Timeout18 ARQ Protocols Anish Goel

19. Go-Back-N Transmitter & Receiver19 ARQ Protocols Anish Goel

20. Sliding Window Operation20 ARQ Protocols Anish Goel

21. Maximum Allowable Window Size is Ws = 2m-121 ARQ Protocols Anish Goel

22. ACK Piggybacking in Bidirectional GBN22 ARQ Protocols Anish Goel

23. Required Timeout & Window Size for Bidirectional GBN23 ARQ Protocols Anish Goel

24. Applications of Go-Back-N ARQ24 ARQ Protocols Anish Goel

25. Required Window Size for Delay-Bandwidth25 ARQ Protocols Anish Goel

26. Efficiency of Go-Back-N26 ARQ Protocols Anish Goel

27. Example: Impact of Bit Error Rate on GBN27 ARQ Protocols Anish Goel

28. Selective Repeat ARQ28 ARQ Protocols Anish Goel

29. Selective Repeat ARQ29 ARQ Protocols Anish Goel

30. Selective Repeat ARQ30 ARQ Protocols Anish Goel

31. Send & Receive Windows31 ARQ Protocols Anish Goel

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

33. Ws + Wr = 2m is maximum allowed33 ARQ Protocols Anish Goel

34. Why Ws + Wr = 2m works34 ARQ Protocols Anish Goel

35. Applications of Selective Repeat ARQ35 ARQ Protocols Anish Goel

36. Efficiency of Selective Repeat36 ARQ Protocols Anish Goel

37. Example: Impact of Bit Error Rate on Selective Repeat37 ARQ Protocols Anish Goel

38. Comparison of ARQ Efficiencies38 ARQ Protocols Anish Goel

39. ARQ Efficiencies39 ARQ Protocols Anish Goel