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Medium Access Control

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Medium Access Control

Medium Access Control

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Transcript

  • 1. Medium Access ControlProtocols
    Prof. Anish Goel
    Acknowledgement: This Lecture has been borrowed from Prof. Heechang Kim, Adjunct Prof. at NJIT, USA
  • 2. Contents
    Multiple Access Communications
    Random Access
    Scheduling
    Medium Access Control Protocols Anish Goel
    2
  • 3. Multiple Access Communications
    3
    Medium Access Control Protocols Anish Goel
  • 4. Approaches to Media Sharing
    4
    Medium Access Control Protocols Anish Goel
  • 5. Channelization: Satellite
    5
    Medium Access Control Protocols Anish Goel
  • 6. Scheduling: Polling
    6
    Medium Access Control Protocols Anish Goel
  • 7. Scheduling: Token-Passing
    7
    Medium Access Control Protocols Anish Goel
  • 8. Random Access
    8
    Medium Access Control Protocols Anish Goel
  • 9. Selecting a Medium Access Control
    9
    Medium Access Control Protocols Anish Goel
  • 10. Delay-Bandwidth Product
    10
    Medium Access Control Protocols Anish Goel
  • 11. Two-Station MAC Example
    11
    Medium Access Control Protocols Anish Goel
  • 12. Efficiency of Two-Station Example
    12
    Medium Access Control Protocols Anish Goel
  • 13. Typical Delay-Bandwidth Products
    13
    Medium Access Control Protocols Anish Goel
  • 14. MAC protocol features
    14
    Medium Access Control Protocols Anish Goel
  • 15. MAC Performance
    15
    Medium Access Control Protocols Anish Goel
  • 16. Normalized Delay versus Load
    16
    Medium Access Control Protocols Anish Goel
  • 17. Dependence on normalized delay bandwidth product
    17
    Medium Access Control Protocols Anish Goel
  • 18. ALOHA Random Access Scheme
    18
    Medium Access Control Protocols Anish Goel
  • 19. ALOHA Model
    19
    Medium Access Control Protocols Anish Goel
  • 20. Abramson’s Assumption
    20
    Medium Access Control Protocols Anish Goel
  • 21. Throughput of ALOHA
    21
    Medium Access Control Protocols Anish Goel
  • 22. Slotted ALOHA (reduce collision)
    22
    Medium Access Control Protocols Anish Goel
  • 23. Throughput of Slotted ALOHA
    23
    Medium Access Control Protocols Anish Goel
  • 24. Carrier Sensing Multiple Access (CSMA)
    24
    Medium Access Control Protocols Anish Goel
  • 25. CSMA Options
    25
    Medium Access Control Protocols Anish Goel
  • 26. 1-Persistent CSMA Throughput
    26
    Medium Access Control Protocols Anish Goel
  • 27. Non-Persistent CSMA Throughput
    27
    Medium Access Control Protocols Anish Goel
  • 28. CSMA with Collision Detection (CSMA/CD)
    28
    Medium Access Control Protocols Anish Goel
  • 29. CSMA/CD reaction time
    29
    Medium Access Control Protocols Anish Goel
  • 30. CSMA-CD Model (1 persistent)
    30
    Medium Access Control Protocols Anish Goel
  • 31. Contention Resolution
    31
    Medium Access Control Protocols Anish Goel
  • 32. CSMA/CD Throughput
    32
    Medium Access Control Protocols Anish Goel
  • 33. CSMA-CD Application: Ethernet
    33
    Medium Access Control Protocols Anish Goel
  • 34. Throughput for Random Access MACs
    34
    Medium Access Control Protocols Anish Goel
  • 35. Scheduling for Medium Access Control
    35
    Medium Access Control Protocols Anish Goel
  • 36. Reservation System Options
    36
    Medium Access Control Protocols Anish Goel
  • 37. Basic Reservation System
    37
    Medium Access Control Protocols Anish Goel
  • 38. Example
    38
    Medium Access Control Protocols Anish Goel
  • 39. Efficiency of Reservation Systems
    39
    Medium Access Control Protocols Anish Goel
  • 40. Random Access Reservation Systems
    40
    Medium Access Control Protocols Anish Goel
  • 41. Polling Systems
    41
    Medium Access Control Protocols Anish Goel
  • 42. Polling System Options
    42
    Medium Access Control Protocols Anish Goel
  • 43. Application: Token-Passing Rings
    Medium Access Control Protocols Anish Goel
    43
  • 44. Methods of Token Reinsertion
    Medium Access Control Protocols Anish Goel
    44
  • 45. Comparison of MAC approaches
    45
    Medium Access Control Protocols Anish Goel
  • 46. Comparison of MAC approaches
    46
    Medium Access Control Protocols Anish Goel