Medium Access Control
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Medium Access Control

Medium Access Control

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Medium Access Control Medium Access Control Presentation Transcript

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